filesystem: strip exec flag and add nowrite flag to archives

pk3dir now disallows executables, which shouldn't be a problem for anybody.
Revised FS_Path command output.

.cirrus.yml

@@ -1,32 +0,0 @@
-task:
-  name: freebsd-14-amd64
-  freebsd_instance:
-    image_family: freebsd-14-3
-  setup_script:
-    - pkg update
-    - pkg install -y pkgconf git sdl2 python freetype2 libvorbis opusfile bzip2 libbacktrace libogg libvorbis
-    - git submodule update --init --recursive
-  test_script:
-    - ./scripts/cirrus/build_freebsd.sh
-
-task:
-  name: freebsd-15-amd64
-  freebsd_instance:
-    image_family: freebsd-15-0-amd64-zfs
-  setup_script:
-    - pkg update
-    - pkg install -y pkgconf git sdl2 python freetype2 libvorbis opusfile bzip2 libbacktrace libogg libvorbis
-    - git submodule update --init --recursive
-  test_script:
-    - ./scripts/cirrus/build_freebsd.sh
-
-#task:
-#  name: freebsd-16-amd64
-#  freebsd_instance:
-#    image_family: freebsd-16-0-snap
-#  setup_script:
-#    - pkg update
-#    - pkg install -y pkgconf git sdl2 python freetype2 libvorbis opusfile bzip2 libbacktrace libogg libvorbis
-#    - git submodule update --init --recursive
-#  test_script:
-#    - ./scripts/cirrus/build_freebsd.sh

3rdparty/libbacktrace/wscript

@@ -20,10 +20,10 @@ int main (void) {
 }'''
 
 FRAGMENT_GETPAGESIZE='''#include <unistd.h>
-int main(void) { return getpagesize() }'''
+int main(void) { return getpagesize(); }'''
 
 FRAGMENT_GETEXECNAME='''#include <stdlib.h>
-int main(void) { return getexecname() != 0 }'''
+int main(void) { return getexecname() != 0; }'''
 
 FRAGMENT_STRNLEN='''#include <string.h>
 int main(int argc, char **argv) { return (int)strnlen(argv[0], 10); }'''
@@ -120,8 +120,8 @@ def configure(conf):
 		check_frag(FRAGMENT_SYNC, ' __sync extensions', 'HAVE_SYNC_FUNCTIONS'),
 		check_frag(FRAGMENT_GETPAGESIZE, ' getpagesize function', 'HAVE_DECL_GETPAGESIZE'),
 		check_frag(FRAGMENT_STRNLEN, ' strnlen function', 'HAVE_DECL_STRNLEN'),
-		check_frag(FRAGMENT_DL_ITERATE_PHDR % 'link.h', ' dl_iterate_phdr function in link.h', 'HAVE_DL_ITERATE_PHDR', after_tests=['link.h']),
-		check_frag(FRAGMENT_DL_ITERATE_PHDR % 'sys/link.h', ' dl_iterate_phdr function in sys/link.h', 'HAVE_DL_ITERATE_PHDR', after_tests=['sys/link.h']),
+		check_frag(FRAGMENT_DL_ITERATE_PHDR % 'link.h', ' dl_iterate_phdr function in link.h', 'HAVE_DL_ITERATE_PHDR_LINK_H', after_tests=['link.h']),
+		check_frag(FRAGMENT_DL_ITERATE_PHDR % 'sys/link.h', ' dl_iterate_phdr function in sys/link.h', 'HAVE_DL_ITERATE_PHDR_SYS_LINK_H', after_tests=['sys/link.h']),
 		check_frag(FRAGMENT_FCNTL, 'fnctl function', 'HAVE_FCNTL'),
 		check_frag(FRAGMENT_GETEXECNAME, 'getexecname function','HAVE_GETEXECNAME'),
 		check_frag(FRAGMENT_GETIPINFO, '_Unwind_GetIPInfo function', 'HAVE_GETIPINFO'),
@@ -137,6 +137,9 @@ def configure(conf):
 		msg='Checking for in parallel'
 	)
 
+	if conf.is_defined('HAVE_DL_ITERATE_PHDR_LINK_H') or conf.is_defined('HAVE_DL_ITERATE_PHDR_SYS_LINK_H'):
+		conf.define('HAVE_DL_ITERATE_PHDR', 1)
+
 	conf.env[DEFKEYS].sort()
 
 	conf.write_config_header()
@@ -181,7 +184,8 @@ def build(bld):
 
 	task = bld.stlib(
 		source = ['libbacktrace/' + i for i in sources],
-		target = 'backtrace',
+		# while we're using upstream libbacktrace, sometimes compiler picks up it's own version that isn't built with required options
+		target = 'backtrace_custom',
 		features = 'frandomseed' if bld.env.HAVE_FRANDOM_SEED else '',
 		use = 'EXTRAFLAGS lzma z zstd',
 		includes = '. libbacktrace/',

Documentation/development/engine-porting-guide.md

@@ -22,7 +22,7 @@ The other yet unsupported configuration is the big endian.
 
 2) Open `public/build.h` file. Add appropriate checks for your operating system and/or CPU architecture. It shouldn't be hard.
 
-Also, you'll need to build [Half-Life SDK](https://github.com/FWGS/hlsdk-xash3d/). It has same `public/build.h` so reflect changes into it. Note that to be compatible with HLSDK proprietary license, it's relicensed as public domain under [Unlicense](https://unlicense.org).
+Also, you'll need to build [Half-Life SDK](https://github.com/FWGS/hlsdk-portable/). It has same `public/build.h` so reflect changes into it. Note that to be compatible with HLSDK proprietary license, it's relicensed as public domain under [Unlicense](https://unlicense.org).
 
 We have a library naming scheme that allows us and game creators to distribute binaries for different platforms in one archive. Read `Documentation/extensions/library-naming.md` for more information.
 

Documentation/extensions/litwater.md

@@ -0,0 +1,19 @@
+## Lightmapped water
+
+Xash3D FWGS supports lightmapped water, as an extension. It adds three new cvars and new worldspawn key values.
+
+### For level designers:
+
+If you're a level designer and intend to make your level to have lightmapped water, you can put these keyvalues to worldspawn entity description (always first entity in entities list):
+
+| Key                    | Value   | Description |
+| ---------------------- | ------- | ----------- |
+| `_litwater`            | integer | Set to any non-zero value to enable lightmapped water. Overrides `gl_litwater_force` cvar value. |
+| `_litwater_minlight`   | integer | Minimal lightmap value water surface will receive. Helps to avoid too dark areas when water isn't properly lit. If not set, defaults to zero. |
+| `_litwater_scale`      | float   | Scales up lightmap value for water surfaces. If not set, defaults to 1.0. |
+
+### For players:
+
+Some of the maps already have computed lightmap for water surfaces and sometimes water has been properly lit but the support hasn't been declared by the level designer.
+
+As a player, you can enable it in `Video options` menu or through console with `gl_litwater_force` cvar. There are also `gl_litwater_minlight` and `gl_litwater_scale` cvars that function similar to keys above. The default values has been set to `192` and `1.25` respectively to slightly avoid issues with maps that wasn't intended to have lightmapped water.

Documentation/extensions/steam-broker.md

@@ -1,8 +1,139 @@
-# Steam broker protocol
-`sb_connect <ip:port> <server's steam id> <secure> <challenge>` - used for obtaining auth ticket during connection to GoldSrc server
+# Steam API Broker Protocol Specification
 
-`sb_disconnect <ip:port> <challenge>` - used for signaling broker about disconnecting from GoldSrc server
+## Overview
 
-`sb_gamedir <gamedir>` - used for signaling broker about game startup and for announcing started mod, so broker could choose proper AppID for Steam API initialization
+Due to proprietary nature of Steamworks SDK, it cannot be run on same amount
+of platforms supported by Xash3D FWGS, neither we can link library directly due to
+GNU GPLv3 license. 
 
-`sb_terminate` - used for signaling broker about game shutdown, ideally broker should be terminated too (and later restarted automatically and waiting for sb_gamedir message)
+However, here comes the broker, by running it (in trusted
+network, preferrably) on a machine that has Steam client installed, the
+engine can communicate with it, acquiring needed information to log-in into
+Steam protected multiplayer servers.
+
+## Key Characteristics
+
+Broker uses a simple TCP-based binary protocol with the following properties:
+
+- Single active session per connection: once a session is activated, the broker will reject all other TCP connections until the session is terminated.
+- All messages follow a consistent structure with a header, length, and payload: this is called a "frame".
+- Stateful interactions: commands affect the session state, and certain commands are only valid in specific states.
+- Numeric parameters are encoded in little-endian format for compatibility with majority of platforms.
+---
+
+## Frame Format
+
+All communication uses a fixed frame structure:
+
+| Field | Size | Type | Description |
+|-------|------|------|-------------|
+| Header | 4 bytes | ASCII | Frame start signature |
+| Length | 2 bytes | uint16_t (LE) | Size of payload in bytes |
+| Payload | N bytes | Binary | Command string or response data |
+
+**Notes**:
+- Header must be exactly `SBRK` (`53 42 52 4B` in hexadecimal form)
+- Maximum frame size: soft limit is 4096 bytes, hard limit is 65535 bytes (due to uint16_t usage)
+
+---
+
+## Session Lifecycle
+
+```
+┌──────────────┐
+│     IDLE     │ ← Initial state, accepts new TCP connections
+└──────────────┘
+       │ sb_gamedir
+       ↓
+┌──────────────┐
+│    ACTIVE    │ ← Session established, rejecting all of other TCP connections
+└──────────────┘
+       │ sb_connect
+       ↓
+┌──────────────┐
+│    ACTIVE    │ ← Client getting auth ticket to connect to game server
+└──────────────┘
+       │ sb_disconnect
+       ↓
+┌──────────────┐
+│     ...      │ ← Client announcing disconnect from game server, could connect somewhere again
+└──────────────┘
+       │ 
+       ↓
+┌──────────────┐
+│    ACTIVE    │ ← Client shutting down game, terminating broker to reset Steam client state
+└──────────────┘
+       │ sb_terminate
+       ↓
+┌──────────────┐
+│  RESTARTING  │
+└──────────────┘
+```
+
+---
+
+## Commands
+
+All commands listed below are meant to be sent from client to broker as payload of a frame. The broker will parse the command string and respond accordingly.
+
+### Session activation
+
+Activates the session and signaling game startup.
+
+**Format**: `sb_gamedir <gamedir>`
+
+**Response**: None
+
+---
+
+### Authentication ticket request
+
+Requests authentication ticket for a game server.
+
+**Precondition**: Session must be active
+
+**Format**: `sb_connect <ip:port> <server_steamid> <secure> <challenge>`
+
+**Parameters**:
+
+| Name | Description |
+|------|------------------|
+| `<ip:port>` | Game server address (e.g., `127.0.0.1:27015`) |
+| `<server_steamid>` | Server SteamID |
+| `<secure>` | 0 = insecure, 1 = secure |
+| `<challenge>` | Random value for reply prevention |
+
+
+**Response Format**:
+
+| Field | Size | Type | Description |
+|-------|------|------|-------------|
+| Header | 11 bytes | string | `"sb_connect\n"` |
+| Challenge | 4 bytes | int32_t (LE) | Echo of challenge from request |
+| SteamID | 8 bytes | uint64_t (LE) | Client SteamID from configuration |
+| Size | 4 bytes | uint32_t (LE) | Length of ticket in bytes |
+| Ticket | N bytes | - | Authentication ticket data |
+
+---
+
+### Server disconnection announcement
+
+Notifies broker of disconnection from game server.
+
+**Precondition**: Session must be active
+
+**Format**: `sb_disconnect <ip:port> <challenge>`
+
+**Response**: None
+
+---
+
+### Session termination
+
+Signaling game shutdown to broker and resetting Steam client state.
+
+**Format**: `sb_terminate`
+
+**Response**: None
+
+---

Documentation/not-supported-mod-list-and-reasons-why.md

@@ -4,7 +4,7 @@
 |----							|-------			|---------------						|----------------------
 |Area 51						|Update 1			|Uses outdated BSP31 map format and custom HLFX SDK libraries.	|You can try [this tool](https://hlfx.ru/forum/showthread.php?threadid=5250) to convert maps but there no warranty if it works.
 |Arrange Mod: Rebirth					|v150				|No idea yet.							|
-|Blue Shift						|The latest steam release	|Uses vgui2 library which xash3d does not support.		|Recreated source code here: https://github.com/FWGS/hlsdk-xash3d/tree/bshift.
+|Blue Shift						|The latest steam release	|Uses vgui2 library which xash3d does not support.		|Recreated source code here: https://github.com/FWGS/hlsdk-portable/tree/bshift.
 |Counter Strike						|Beta 6.5-			|Uses an old WON HL 1.0.0.16- interface.			|
 |							|1.4				|Has encrypted blob instead of normal client.dll.		|You can try [this tool](https://aluigi.altervista.org/papers/hldlldec.zip) to decrypt client.dll but there no warranty if it works.
 |							|1.5				|Has encrypted blob instead of normal client.dll.		|Decrypted blob here: https://csm.dev/threads/cs-1-5-client-dll-decrypted-patched-for-usage.38845.
@@ -15,6 +15,6 @@
 |Half-Life: Extended					|Day One demo			|Uses many hooks to GoldSource engine and version check.	|Just wait new version or use more old version.
 |Icon of Hell						|Beta 0.99			|Uses outdated BSP31 map format and paranoia 2 libraries.	|You can try [this tool](https://hlfx.ru/forum/showthread.php?threadid=5250) to convert maps and use Paranoia 2: The Savior 1.51 libraries but there no warranty if it works.
 |Paranoia 2: The Savior					|All builds older 1.51		|Uses an old renderer interface and engine features.		|
-|Rebellion						|1.0				|Uses an old WON HL 1.0.0.16- interface.			|Recreated source code here: https://github.com/FWGS/hlsdk-xash3d/tree/rebellion.
+|Rebellion						|1.0				|Uses an old WON HL 1.0.0.16- interface.			|Recreated source code here: https://github.com/FWGS/hlsdk-portable/tree/rebellion.
 |Sven-Coop						|5.0+				|Uses custom GoldSrc engine.					|
 |Time Shadows						|Beta 0.1			|Uses Direct3D renderer.					|

android/app/src/main/AndroidManifest.xml

@@ -57,6 +57,7 @@
 		android:label="@string/app_name"
 		android:roundIcon="@mipmap/ic_launcher"
 		android:theme="@style/Theme.App"
+		android:networkSecurityConfig="@xml/network_security_config"
 		android:usesCleartextTraffic="true"
 		android:requestLegacyExternalStorage="true">
 		<activity
@@ -68,6 +69,15 @@
 				<category android:name="android.intent.category.LAUNCHER" />
 			</intent-filter>
 		</activity>
+		<provider
+			android:name="androidx.core.content.FileProvider"
+			android:authorities="${applicationId}.fileprovider"
+			android:exported="false"
+			android:grantUriPermissions="true">
+			<meta-data
+				android:name="android.support.FILE_PROVIDER_PATHS"
+				android:resource="@xml/provider_paths" />
+		</provider>
 		<activity
 			android:name=".XashActivity"
 			android:alwaysRetainTaskState="true"

android/app/src/main/java/su/xash/engine/MainActivity.kt

@@ -1,6 +1,7 @@
 package su.xash.engine
 
 import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment
@@ -8,6 +9,11 @@ import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.navigateUp
 import androidx.navigation.ui.setupActionBarWithNavController
 import su.xash.engine.databinding.ActivityMainBinding
+import su.xash.engine.util.CrashReports
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
 
 class MainActivity : AppCompatActivity() {
 	private lateinit var binding: ActivityMainBinding
@@ -27,9 +33,36 @@ class MainActivity : AppCompatActivity() {
 		navController = navHostFragment.navController
 		appBarConfiguration = AppBarConfiguration(navController.graph)
 		setupActionBarWithNavController(navController, appBarConfiguration)
+
+		CrashReports.prune(this)
+		showPendingCrashReport()
 	}
 
 	override fun onSupportNavigateUp(): Boolean {
 		return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()
 	}
+
+	private fun showPendingCrashReport() {
+		val pending = CrashReports.pendingFile(this)
+		if (!pending.exists() || pending.length() == 0L)
+			return
+
+		val historyDir = CrashReports.historyDir(this).apply { mkdirs() }
+		val ts = SimpleDateFormat("yyyyMMdd-HHmmss", Locale.US).format(Date())
+		val archived = File(historyDir, "crash-$ts.log")
+		if (!pending.renameTo(archived)) {
+			// fall back to in-place read if move failed; still consume the file
+			archived.writeText(pending.readText())
+			pending.delete()
+		}
+
+		val content = archived.readText()
+		AlertDialog.Builder(this)
+			.setTitle(R.string.crash_dialog_title)
+			.setView(CrashReports.buildContentView(this, content))
+			.setPositiveButton(R.string.crash_send_to_developers) { _, _ -> CrashReports.sendByEmail(this, content) }
+			.setNeutralButton(R.string.crash_share) { _, _ -> CrashReports.share(this, archived) }
+			.setNegativeButton(R.string.crash_dismiss, null)
+			.show()
+	}
 }

android/app/src/main/java/su/xash/engine/XashActivity.java

@@ -15,6 +15,7 @@ import org.libsdl.app.SDLActivity;
 
 import su.xash.engine.util.AndroidBug5497Workaround;
 
+import java.io.File;
 import java.util.Arrays;
 import java.util.List;
 
@@ -123,6 +124,10 @@ public class XashActivity extends SDLActivity {
 	// TODO: REMOVE LATER, temporary launchers support?
 	@Override
 	protected String[] getArguments() {
+		File crashDir = new File(getFilesDir(), "crashes");
+		crashDir.mkdirs();
+		nativeSetenv("XASH3D_CRASH_DIR", crashDir.getAbsolutePath());
+
 		String gamedir = getIntent().getStringExtra("gamedir");
 		if (gamedir == null) gamedir = "valve";
 		nativeSetenv("XASH3D_GAME", gamedir);
@@ -130,6 +135,14 @@ public class XashActivity extends SDLActivity {
 		String gamelibdir = getIntent().getStringExtra("gamelibdir");
 		if (gamelibdir != null) nativeSetenv("XASH3D_GAMELIBDIR", gamelibdir);
 
+		String rodir = System.getenv("XASH3D_RODIR");
+		if (rodir == null) {
+			// FIXME: we are using rodir as a supplier for downloaded game libraries
+			rodir = getFilesDir().getAbsolutePath() + "/gamelibs";
+			nativeSetenv("XASH3D_RODIR", rodir);
+		}
+		Log.i(TAG, "XASH3D_RODIR = " + rodir);
+
 		String pakfile = getIntent().getStringExtra("pakfile");
 		if (pakfile != null) nativeSetenv("XASH3D_EXTRAS_PAK2", pakfile);
 

android/app/src/main/java/su/xash/engine/model/Game.kt

@@ -6,14 +6,19 @@ import android.content.pm.PackageInfo
 import android.content.pm.PackageManager
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
+import android.view.LayoutInflater
+import android.widget.TextView
 import androidx.core.net.toUri
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.google.android.material.progressindicator.LinearProgressIndicator
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.launch
 import su.xash.engine.R
 import su.xash.engine.XashActivity
 import java.io.File
 import java.io.FileInputStream
-import java.util.Arrays
-import android.util.Log
 
 class Game(val ctx: Context, val basedir: File, val gameInfoFile: File) {
 	private var iconName = "game.ico"
@@ -52,7 +57,7 @@ class Game(val ctx: Context, val basedir: File, val gameInfoFile: File) {
 	fun startEngine(ctx: Context) {
 		val packageNames = getPackageNamesForGameDir(basedir.name)
 		var externalGame = false
-		var commandLineArgs = "";
+		var commandLineArgs = ""
 
 		if (basedir.name != defaultGameDir)
 			commandLineArgs += "-game ${basedir.name} "
@@ -68,17 +73,18 @@ class Game(val ctx: Context, val basedir: File, val gameInfoFile: File) {
 			}
 		}
 
-		commandLineArgs += pref.getString("arguments", "-console -log")
+		commandLineArgs += pref.getString("arguments", "-console -log") ?: ""
 
-		var packageName: String? = null
-		var gameLibDir: String? = null
 		if (externalGame && packageNames != null) {
+			var packageName: String? = null
+			var gameLibDir: String? = null
+
 			for (pn in packageNames) {
 				gameLibDir = try {
 					getGameLibDir(ctx, pn)
-				} catch(e: PackageManager.NameNotFoundException) {
+				} catch (e: PackageManager.NameNotFoundException) {
 					null
-				} catch(e: Exception) {
+				} catch (e: Exception) {
 					e.printStackTrace()
 					null
 				}
@@ -99,12 +105,95 @@ class Game(val ctx: Context, val basedir: File, val gameInfoFile: File) {
 						ctx.startActivity(intent)
 					}
 					show()
-
-					return
 				}
+				return
+			}
+
+			launchEngine(ctx, commandLineArgs, packageName = packageName, gameLibDir = gameLibDir)
+			return
+		}
+
+		if (packageNames == null) {
+			// Unknown game — try to use downloaded libraries from hlsdk-mega-build
+			val downloader = GameLibDownloader(ctx)
+			val args = commandLineArgs
+
+			if (downloader.isDownloaded(basedir.name)) {
+				downloader.logExistingLibs(basedir.name)
+				launchEngine(ctx, args)
+				return
+			}
+
+			val scope = CoroutineScope(Dispatchers.Main + SupervisorJob())
+			scope.launch {
+				when (val r = downloader.lookupBuild(basedir.name)) {
+					is GameLibDownloader.Lookup.Available -> showDownloadDialog(ctx, downloader, args)
+					is GameLibDownloader.Lookup.NotInManifest -> launchEngine(ctx, args)
+					is GameLibDownloader.Lookup.Error -> showManifestErrorDialog(ctx, args, r.cause)
+				}
+			}
+			return
+		}
+
+		launchEngine(ctx, commandLineArgs)
+	}
+
+	private fun showDownloadDialog(ctx: Context, downloader: GameLibDownloader, commandLineArgs: String) {
+		val view = LayoutInflater.from(ctx).inflate(R.layout.dialog_download_progress, null)
+		val progressBar = view.findViewById<LinearProgressIndicator>(R.id.downloadProgress)
+		val statusText = view.findViewById<TextView>(R.id.downloadStatus)
+
+		val dialog = MaterialAlertDialogBuilder(ctx)
+			.setTitle(R.string.downloading_game_libs)
+			.setView(view)
+			.setCancelable(true)
+			.setNegativeButton(android.R.string.cancel) { d, _ -> d.dismiss() }
+			.create()
+
+		dialog.show()
+
+		val scope = CoroutineScope(Dispatchers.Main + SupervisorJob())
+		val job = scope.launch {
+			val result = downloader.download(basedir.name) { progress ->
+				progressBar.isIndeterminate = false
+				progressBar.progress = (progress * 100).toInt()
+				statusText.text = ctx.getString(R.string.download_progress, (progress * 100).toInt())
+			}
+
+			if (!dialog.isShowing) return@launch
+
+			dialog.dismiss()
+
+			if (result.isSuccess) {
+				launchEngine(ctx, commandLineArgs)
+			} else {
+				MaterialAlertDialogBuilder(ctx)
+					.setTitle(R.string.download_failed)
+					.setMessage(result.exceptionOrNull()?.message
+						?: ctx.getString(R.string.download_error))
+					.setPositiveButton(android.R.string.ok, null)
+					.show()
 			}
 		}
 
+		dialog.setOnDismissListener { job.cancel() }
+	}
+
+	private fun showManifestErrorDialog(ctx: Context, commandLineArgs: String, cause: Throwable) {
+		MaterialAlertDialogBuilder(ctx)
+			.setTitle(R.string.manifest_error_title)
+			.setMessage(ctx.getString(R.string.manifest_error_message, cause.message ?: cause.javaClass.simpleName))
+			.setPositiveButton(R.string.launch_anyway) { _, _ -> launchEngine(ctx, commandLineArgs) }
+			.setNegativeButton(android.R.string.cancel, null)
+			.show()
+	}
+
+	private fun launchEngine(
+		ctx: Context,
+		commandLineArgs: String,
+		packageName: String? = null,
+		gameLibDir: String? = null
+	) {
 		ctx.startActivity(Intent(ctx, XashActivity::class.java).apply {
 			flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
 
@@ -113,13 +202,8 @@ class Game(val ctx: Context, val basedir: File, val gameInfoFile: File) {
 			putExtra("usevolume", pref.getBoolean("use_volume_buttons", false))
 			putExtra("basedir", basedir.parent)
 
-			if (gameLibDir != null) {
-				putExtra("gamelibdir", gameLibDir)
-			}
-
-			if (packageName != null) {
-				putExtra("package", packageName)
-			}
+			if (gameLibDir != null) putExtra("gamelibdir", gameLibDir)
+			if (packageName != null) putExtra("package", packageName)
 		})
 	}
 
@@ -152,9 +236,6 @@ class Game(val ctx: Context, val basedir: File, val gameInfoFile: File) {
 		if (mobileHacksGames.any { it.equals(gamedir, ignoreCase = true) })
 			return arrayOf("su.xash.engine")
 
-        // return if (mDbEntry != null) {
-        //    mDbEntry.getPackageName()
-        // } else null
 		return null
 	}
 

android/app/src/main/java/su/xash/engine/model/GameLibDownloader.kt

@@ -0,0 +1,373 @@
+package su.xash.engine.model
+
+import android.content.Context
+import android.os.Build
+import android.util.Log
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ensureActive
+import kotlinx.coroutines.withContext
+import org.json.JSONObject
+import java.io.File
+import java.io.FileOutputStream
+import java.io.IOException
+import java.net.HttpURLConnection
+import java.net.URL
+import java.security.MessageDigest
+import java.util.zip.ZipInputStream
+import kotlin.coroutines.coroutineContext
+
+class GameLibDownloader(private val context: Context) {
+
+	private val prefs get() = context.getSharedPreferences("gamelib_metadata", Context.MODE_PRIVATE)
+
+	// converts Android's ABI to library-suffix's arch names
+	fun getArch(): String? {
+		for (abi in Build.SUPPORTED_ABIS) {
+			when (abi) {
+				"arm64-v8a" -> return "arm64"
+				"armeabi-v7a" -> return "armv7l"
+				"x86_64" -> return "amd64"
+				"x86" -> return "i386"
+			}
+		}
+		return null
+	}
+
+	fun getLibsBaseDir(): File = File(context.filesDir, "gamelibs")
+
+	fun isDownloaded(gamedir: String): Boolean {
+		val dir = File(getLibsBaseDir(), gamedir)
+		if (dir.isDirectory && dir.list()?.isNotEmpty() == true)
+			return true
+
+		// zips extract to the case used in the manifest (e.g. "CAd"); the user's
+		// folder name might differ in case, so do a case-insensitive lookup too.
+		val base = getLibsBaseDir()
+		val match = base.listFiles()?.firstOrNull {
+			it.isDirectory && it.name.equals(gamedir, ignoreCase = true)
+		}
+		return match != null && (match.list()?.isNotEmpty() == true)
+	}
+
+	data class ManifestEntry(
+		val modKey: String,
+		val platformArch: String,
+		val filename: String,
+		val sha256: String,
+		val sourceJson: String?
+	)
+
+	data class SourceInfo(
+		val url: String?,
+		val branch: String?,
+		val commit: String?
+	)
+
+	private fun manifestCacheFile(): File = File(context.cacheDir, "hlsdk-manifest.json")
+
+	private suspend fun fetchManifest(): JSONObject? = fetchManifestOrError().first
+
+	private suspend fun fetchManifestOrError(): Pair<JSONObject?, Throwable?> {
+		val cacheFile = manifestCacheFile()
+		var connection: HttpURLConnection? = null
+		try {
+			connection = URL(MANIFEST_URL).openConnection() as HttpURLConnection
+			connection.connectTimeout = 10000
+			connection.readTimeout = 15000
+			connection.instanceFollowRedirects = true
+			connection.connect()
+
+			if (connection.responseCode != HttpURLConnection.HTTP_OK) {
+				val err = IOException("HTTP ${connection.responseCode} fetching manifest")
+				Log.w(TAG, "Manifest fetch failed: ${err.message}")
+				val cached = readCachedManifest(cacheFile)
+				return if (cached != null) cached to null else null to err
+			}
+
+			val text = connection.inputStream.bufferedReader().use { it.readText() }
+			val json = JSONObject(text)
+			val versionError = checkManifestVersion(json)
+			if (versionError != null) {
+				Log.w(TAG, "Manifest rejected: ${versionError.message}")
+				return null to versionError
+			}
+			cacheFile.writeText(text)
+			return json to null
+		} catch (e: Exception) {
+			Log.w(TAG, "Manifest fetch failed: ${e.message}")
+			val cached = readCachedManifest(cacheFile)
+			return if (cached != null) cached to null else null to e
+		} finally {
+			connection?.disconnect()
+		}
+	}
+
+	private fun readCachedManifest(cacheFile: File): JSONObject? {
+		if (!cacheFile.exists())
+			return null
+		val json = try {
+			JSONObject(cacheFile.readText())
+		} catch (_: Exception) {
+			return null
+		}
+		return if (checkManifestVersion(json) == null) json else null
+	}
+
+	private fun checkManifestVersion(json: JSONObject): IOException? {
+		if (!json.has("version"))
+			return IOException("Manifest missing 'version' field")
+		val v = json.opt("version")
+		if (v !is Int || v != MANIFEST_VERSION)
+			return IOException("Unsupported manifest version: $v (expected $MANIFEST_VERSION)")
+		return null
+	}
+
+	private fun lookupEntry(manifest: JSONObject, gamedir: String): ManifestEntry? {
+		val arch = getArch() ?: return null
+		val platformArch = "android-$arch"
+		val mods = manifest.optJSONObject("mods") ?: return null
+
+		// Find mod key case-insensitively
+		var modKey: String? = null
+		val keys = mods.keys()
+		while (keys.hasNext()) {
+			val k = keys.next()
+			if (k.equals(gamedir, ignoreCase = true)) {
+				modKey = k
+				break
+			}
+		}
+		if (modKey == null)
+			return null
+
+		val builds = mods.optJSONObject(modKey)?.optJSONObject("builds") ?: return null
+		val build = builds.optJSONObject(platformArch) ?: return null
+		val filename = build.optString("filename", "")
+		val sha256 = build.optString("sha256", "")
+		if (filename.isEmpty() || sha256.isEmpty())
+			return null
+
+		val sourceJson = build.optJSONObject("source")?.toString()
+		return ManifestEntry(modKey, platformArch, filename, sha256.lowercase(), sourceJson)
+	}
+
+	fun getSourceInfo(gamedir: String): SourceInfo? {
+		val raw = prefs.getString("${gamedir}_source", null) ?: return null
+		return try {
+			val o = JSONObject(raw)
+			SourceInfo(
+				url = o.optString("url").ifEmpty { null },
+				branch = o.optString("branch").ifEmpty { null },
+				commit = o.optString("commit").ifEmpty { null },
+			)
+		} catch (_: Exception) {
+			null
+		}
+	}
+
+	fun getDownloadTime(gamedir: String): Long =
+		prefs.getLong("${gamedir}_download_time", 0L)
+
+	sealed class Lookup {
+		data class Available(val entry: ManifestEntry) : Lookup()
+		object NotInManifest : Lookup()
+		data class Error(val cause: Throwable) : Lookup()
+	}
+
+	suspend fun lookupBuild(gamedir: String): Lookup {
+		return withContext(Dispatchers.IO) {
+			val (manifest, error) = fetchManifestOrError()
+			if (manifest == null)
+				return@withContext Lookup.Error(error ?: IOException("Failed to fetch manifest"))
+			val entry = lookupEntry(manifest, gamedir)
+				?: return@withContext Lookup.NotInManifest
+			Lookup.Available(entry)
+		}
+	}
+
+	suspend fun isUpdateAvailable(gamedir: String): Boolean {
+		return withContext(Dispatchers.IO) {
+			val manifest = fetchManifest() ?: return@withContext false
+			val entry = lookupEntry(manifest, gamedir) ?: return@withContext false
+			val storedSha = prefs.getString("${gamedir}_sha256", null)
+			storedSha == null || !storedSha.equals(entry.sha256, ignoreCase = true)
+		}
+	}
+
+	private fun urlForFilename(filename: String): String = "$RELEASE_BASE_URL/$filename"
+
+	private suspend fun tryDownload(
+		url: String,
+		dest: File,
+		onProgress: (Float) -> Unit
+	): Exception? {
+		var connection: HttpURLConnection? = null
+		try {
+			connection = URL(url).openConnection() as HttpURLConnection
+			connection.connectTimeout = 10000
+			connection.readTimeout = 30000
+			connection.instanceFollowRedirects = true
+			connection.connect()
+
+			val code = connection.responseCode
+			if (code !in 200..299)
+				return IOException("HTTP $code: $url")
+
+			val total = connection.contentLengthLong
+			var downloaded = 0L
+
+			connection.inputStream.use { input ->
+				FileOutputStream(dest).use { output ->
+					val buffer = ByteArray(65536)
+					while (true) {
+						coroutineContext.ensureActive()
+						val read = input.read(buffer)
+						if (read < 0)
+							break
+						output.write(buffer, 0, read)
+						downloaded += read
+						if (total > 0) {
+							val progress = downloaded.toFloat() / total
+							withContext(Dispatchers.Main) { onProgress(progress) }
+						}
+					}
+				}
+			}
+
+			return null
+		} catch (e: Exception) {
+			return e
+		} finally {
+			connection?.disconnect()
+		}
+	}
+
+	suspend fun download(gamedir: String, onProgress: (Float) -> Unit): Result<Unit> {
+		return withContext(Dispatchers.IO) {
+			val manifest = fetchManifest()
+				?: return@withContext Result.failure(IOException("Failed to fetch manifest"))
+
+			val entry = lookupEntry(manifest, gamedir)
+				?: return@withContext Result.failure(IOException("No build for '$gamedir' on ${getArch() ?: "this arch"}"))
+
+			val url = urlForFilename(entry.filename)
+			val tempFile = File(context.cacheDir, entry.filename)
+
+			try {
+				coroutineContext.ensureActive()
+				Log.i(TAG, "Downloading $url -> ${tempFile.absolutePath}")
+				val error = tryDownload(url, tempFile, onProgress)
+				if (error != null)
+					return@withContext Result.failure(error)
+
+				val actualSha = computeSHA256(tempFile)
+				Log.i(TAG, "Downloaded ${tempFile.length()} bytes, SHA-256: $actualSha (expected ${entry.sha256})")
+
+				if (!actualSha.equals(entry.sha256, ignoreCase = true))
+					return@withContext Result.failure(IOException("SHA-256 mismatch: expected ${entry.sha256}, got $actualSha"))
+
+				val destDir = getLibsBaseDir()
+				destDir.mkdirs()
+				val destCanon = destDir.canonicalPath
+
+				// Remove any prior install (possibly under a differently-cased dir) so we
+				// don't leave behind .so files from an older build.
+				destDir.listFiles()?.forEach {
+					if (it.isDirectory && it.name.equals(entry.modKey, ignoreCase = true))
+						it.deleteRecursively()
+				}
+
+				Log.i(TAG, "Extracting to ${destDir.absolutePath}")
+
+				val extractedFiles = mutableListOf<String>()
+				ZipInputStream(tempFile.inputStream()).use { zip ->
+					var zipEntry = zip.nextEntry
+					while (zipEntry != null) {
+						coroutineContext.ensureActive()
+						if (!zipEntry.isDirectory) {
+							val outFile = File(destDir, zipEntry.name)
+							if (!outFile.canonicalPath.startsWith(destCanon + File.separator))
+								throw SecurityException("Zip path traversal: ${zipEntry.name}")
+							outFile.parentFile?.mkdirs()
+							FileOutputStream(outFile).use { zip.copyTo(it) }
+							// ZipInputStream doesn't restore Unix permissions; shared libraries
+							// need the execute bit so dlopen can mmap them with PROT_EXEC
+							if (outFile.name.endsWith(".so"))
+								outFile.setExecutable(true, false)
+							extractedFiles.add("  ${outFile.absolutePath} (${outFile.length()} bytes, executable: ${outFile.canExecute()})")
+						}
+						zip.closeEntry()
+						zipEntry = zip.nextEntry
+					}
+				}
+
+				Log.i(TAG, "Extracted ${extractedFiles.size} files:")
+				extractedFiles.forEach { Log.i(TAG, it) }
+
+				prefs.edit()
+					.putString("${gamedir}_sha256", entry.sha256)
+					.putString("${gamedir}_filename", entry.filename)
+					.putString("${gamedir}_source", entry.sourceJson)
+					.putLong("${gamedir}_download_time", System.currentTimeMillis())
+					.apply()
+
+				Result.success(Unit)
+			} catch (e: Exception) {
+				// Best-effort: rewinding to a clean state on failure
+				File(getLibsBaseDir(), entry.modKey).deleteRecursively()
+				Result.failure(e)
+			} finally {
+				tempFile.delete()
+			}
+		}
+	}
+
+	fun logExistingLibs(gamedir: String) {
+		val gameDir = File(getLibsBaseDir(), gamedir)
+		val resolved = if (gameDir.exists()) {
+			gameDir
+		} else {
+			getLibsBaseDir().listFiles()?.firstOrNull {
+				it.isDirectory && it.name.equals(gamedir, ignoreCase = true)
+			}
+		}
+
+		if (resolved == null) {
+			Log.i(TAG, "Game libs dir does not exist for $gamedir")
+			return
+		}
+
+		Log.i(TAG, "Existing game libs under ${resolved.absolutePath}:")
+		resolved.walkTopDown().filter { it.isFile }.forEach {
+			Log.i(TAG, "  ${it.absolutePath} (${it.length()} bytes)")
+		}
+		val storedSha = prefs.getString("${gamedir}_sha256", null)
+		val downloadTime = prefs.getLong("${gamedir}_download_time", 0L)
+		Log.i(TAG, "Archive SHA-256: $storedSha")
+		if (downloadTime > 0L)
+			Log.i(TAG, "Downloaded at: ${java.util.Date(downloadTime)}")
+	}
+
+	private fun computeSHA256(file: File): String {
+		val digest = MessageDigest.getInstance("SHA-256")
+		file.inputStream().use { input ->
+			val buffer = ByteArray(65536)
+			while (true) {
+				val read = input.read(buffer)
+				if (read < 0)
+					break
+				digest.update(buffer, 0, read)
+			}
+		}
+		return digest.digest().joinToString("") { "%02x".format(it) }
+	}
+
+	companion object {
+		private const val TAG = "GameLibDownloader"
+		private const val RELEASE_BASE_URL =
+			"https://github.com/FWGS/hlsdk-mega-build/releases/download/continuous"
+		private const val MANIFEST_URL =
+			"$RELEASE_BASE_URL/manifest.json"
+		private const val MANIFEST_VERSION = 1
+	}
+}

android/app/src/main/java/su/xash/engine/ui/settings/AppSettingsPreferenceFragment.kt

@@ -1,6 +1,8 @@
 package su.xash.engine.ui.settings
 
 import android.os.Bundle
+import androidx.navigation.fragment.findNavController
+import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import su.xash.engine.R
 
@@ -8,5 +10,10 @@ class AppSettingsPreferenceFragment() : PreferenceFragmentCompat() {
 	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
 		preferenceManager.sharedPreferencesName = "app_preferences";
 		setPreferencesFromResource(R.xml.app_preferences, rootKey);
+
+		findPreference<Preference>("crash_logs")?.setOnPreferenceClickListener {
+			findNavController().navigate(R.id.action_appSettingsFragment_to_crashLogsFragment)
+			true
+		}
 	}
 }

android/app/src/main/java/su/xash/engine/ui/settings/CrashLogsFragment.kt

@@ -0,0 +1,66 @@
+package su.xash.engine.ui.settings
+
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.preference.Preference
+import androidx.preference.PreferenceFragmentCompat
+import su.xash.engine.R
+import su.xash.engine.util.CrashReports
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+class CrashLogsFragment : PreferenceFragmentCompat() {
+	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+		preferenceScreen = preferenceManager.createPreferenceScreen(requireContext())
+		populate()
+	}
+
+	override fun onResume() {
+		super.onResume()
+		populate()
+	}
+
+	private fun populate() {
+		val ctx = requireContext()
+		preferenceScreen.removeAll()
+
+		val files = CrashReports.historyDir(ctx).listFiles()?.sortedByDescending { it.lastModified() } ?: emptyList()
+
+		if (files.isEmpty()) {
+			preferenceScreen.addPreference(Preference(ctx).apply {
+				setTitle(R.string.crash_logs_empty)
+				isSelectable = false
+			})
+			return
+		}
+
+		val fmt = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US)
+		files.forEach { file ->
+			preferenceScreen.addPreference(Preference(ctx).apply {
+				title = fmt.format(Date(file.lastModified()))
+				summary = file.name
+				setOnPreferenceClickListener {
+					showCrashLog(file)
+					true
+				}
+			})
+		}
+	}
+
+	private fun showCrashLog(file: File) {
+		val ctx = requireContext()
+		val content = file.readText()
+		AlertDialog.Builder(ctx)
+			.setTitle(file.name)
+			.setView(CrashReports.buildContentView(ctx, content))
+			.setPositiveButton(R.string.crash_send_to_developers) { _, _ -> CrashReports.sendByEmail(ctx, content) }
+			.setNeutralButton(R.string.crash_share) { _, _ -> CrashReports.share(ctx, file) }
+			.setNegativeButton(R.string.crash_log_delete) { _, _ ->
+				file.delete()
+				populate()
+			}
+			.show()
+	}
+}

android/app/src/main/java/su/xash/engine/ui/settings/GameSettingsPreferenceFragment.kt

@@ -1,11 +1,17 @@
 package su.xash.engine.ui.settings
 
+import android.content.Intent
 import android.os.Bundle
+import androidx.core.net.toUri
 import androidx.preference.ListPreference
+import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.SwitchPreferenceCompat
 import su.xash.engine.R
 import su.xash.engine.model.Game
+import su.xash.engine.model.GameLibDownloader
+import java.text.DateFormat
+import java.util.Date
 
 class GameSettingsPreferenceFragment(val game: Game) : PreferenceFragmentCompat() {
 	override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
@@ -26,6 +32,8 @@ class GameSettingsPreferenceFragment(val game: Game) : PreferenceFragmentCompat(
 			enableYaPBBots.isVisible = true
 		}
 
+		populateDownloadedBuildInfo()
+
 		val separatePackages = findPreference<SwitchPreferenceCompat>("separate_libraries")!!
 		val clientPackage = findPreference<ListPreference>("client_package")!!
 		val serverPackage = findPreference<ListPreference>("server_package")!!
@@ -43,4 +51,43 @@ class GameSettingsPreferenceFragment(val game: Game) : PreferenceFragmentCompat(
 			true
 		}
 	}
+
+	private fun populateDownloadedBuildInfo() {
+		val downloader = GameLibDownloader(requireContext())
+		val source = downloader.getSourceInfo(game.basedir.name) ?: return
+		val downloadedAt = downloader.getDownloadTime(game.basedir.name)
+
+		val urlPref = findPreference<Preference>("source_url")!!
+		urlPref.isVisible = true
+		urlPref.summary = source.url ?: "—"
+		urlPref.isEnabled = source.url != null
+		urlPref.setOnPreferenceClickListener {
+			source.url?.let {
+				startActivity(Intent(Intent.ACTION_VIEW, it.toUri()))
+			}
+			true
+		}
+
+		val branchPref = findPreference<Preference>("source_branch")!!
+		branchPref.isVisible = true
+		branchPref.summary = source.branch ?: "—"
+
+		val commitPref = findPreference<Preference>("source_commit")!!
+		commitPref.isVisible = true
+		commitPref.summary = source.commit ?: "—"
+		commitPref.isEnabled = source.commit != null && source.url != null
+		commitPref.setOnPreferenceClickListener {
+			// FIXME: GitHub-styled URL!
+			val target = "${source.url!!.trimEnd('/')}/commit/${source.commit}"
+			startActivity(Intent(Intent.ACTION_VIEW, target.toUri()))
+			true
+		}
+
+		val timePref = findPreference<Preference>("downloaded_at")!!
+		timePref.isVisible = true
+		timePref.summary = if (downloadedAt > 0L)
+			DateFormat.getDateTimeInstance().format(Date(downloadedAt))
+		else
+			"—"
+	}
 }

android/app/src/main/java/su/xash/engine/util/CrashReports.kt

@@ -0,0 +1,80 @@
+package su.xash.engine.util
+
+import android.content.Context
+import android.content.Intent
+import android.graphics.Typeface
+import android.net.Uri
+import android.util.TypedValue
+import android.view.View
+import android.widget.ScrollView
+import android.widget.TextView
+import androidx.core.content.FileProvider
+import su.xash.engine.BuildConfig
+import su.xash.engine.R
+import java.io.File
+
+object CrashReports {
+	private const val PREFS = "crash_reports"
+	private const val KEY_LAST_VERSION = "last_version_code"
+	private const val MAX_AGE_MS = 30L * 24L * 60L * 60L * 1000L // 30 days
+
+	private const val D = "9c8d9e8c97bf9988988cd1989e86"
+
+	fun pendingFile(ctx: Context): File = File(ctx.filesDir, "crashes/crash.log")
+	fun historyDir(ctx: Context): File = File(ctx.filesDir, "crashes/history")
+
+	// wipe everything on app update; otherwise drop logs older than 30 days
+	fun prune(ctx: Context) {
+		val prefs = ctx.getSharedPreferences(PREFS, Context.MODE_PRIVATE)
+		val lastVersion = prefs.getInt(KEY_LAST_VERSION, -1)
+		val currentVersion = BuildConfig.VERSION_CODE
+
+		if (lastVersion != currentVersion) {
+			historyDir(ctx).listFiles()?.forEach { it.delete() }
+			pendingFile(ctx).delete()
+			prefs.edit().putInt(KEY_LAST_VERSION, currentVersion).apply()
+			return
+		}
+
+		val cutoff = System.currentTimeMillis() - MAX_AGE_MS
+		historyDir(ctx).listFiles()?.forEach { f ->
+			if (f.lastModified() < cutoff) f.delete()
+		}
+	}
+
+	fun sendByEmail(ctx: Context, content: String) {
+		val addr = D.chunked(2) { (it.toString().toInt(16) xor 0xFF).toChar() }.joinToString("")
+		val intent = Intent(Intent.ACTION_SENDTO).apply {
+			data = Uri.fromParts("mailto", addr, null)
+			putExtra(Intent.EXTRA_SUBJECT, ctx.getString(R.string.crash_email_subject))
+			putExtra(Intent.EXTRA_TEXT, content)
+		}
+		if (intent.resolveActivity(ctx.packageManager) != null) {
+			ctx.startActivity(intent)
+		}
+	}
+
+	fun buildContentView(ctx: Context, content: String): View {
+		val pad = (16 * ctx.resources.displayMetrics.density).toInt()
+		val text = TextView(ctx).apply {
+			text = content
+			typeface = Typeface.MONOSPACE
+			setTextIsSelectable(true)
+			setTextSize(TypedValue.COMPLEX_UNIT_SP, 12f)
+			setPadding(pad, pad, pad, pad)
+		}
+		return ScrollView(ctx).apply { addView(text) }
+	}
+
+	fun share(ctx: Context, file: File) {
+		val authority = "${BuildConfig.APPLICATION_ID}.fileprovider"
+		val uri = FileProvider.getUriForFile(ctx, authority, file)
+		val intent = Intent(Intent.ACTION_SEND).apply {
+			type = "text/plain"
+			putExtra(Intent.EXTRA_SUBJECT, ctx.getString(R.string.crash_email_subject))
+			putExtra(Intent.EXTRA_STREAM, uri)
+			addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+		}
+		ctx.startActivity(Intent.createChooser(intent, ctx.getString(R.string.crash_share)))
+	}
+}

android/app/src/main/res/layout/dialog_download_progress.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="match_parent"
+	android:layout_height="wrap_content"
+	android:orientation="vertical"
+	android:paddingHorizontal="24dp"
+	android:paddingBottom="8dp">
+
+	<com.google.android.material.textview.MaterialTextView
+		android:id="@+id/downloadStatus"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:text="@string/downloading" />
+
+	<com.google.android.material.progressindicator.LinearProgressIndicator
+		android:id="@+id/downloadProgress"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="16dp"
+		android:indeterminate="true" />
+
+</LinearLayout>

android/app/src/main/res/layout/fragment_game_settings.xml

@@ -16,8 +16,9 @@
 	<androidx.fragment.app.FragmentContainerView
 		android:id="@+id/settingsFragment"
 		android:layout_width="match_parent"
-		android:layout_height="wrap_content"
+		android:layout_height="0dp"
 		app:layout_constraintTop_toBottomOf="@id/gameCard"
+		app:layout_constraintBottom_toBottomOf="parent"
 		tools:layout="@android:layout/list_content">
 
 	</androidx.fragment.app.FragmentContainerView>

android/app/src/main/res/navigation/nav_graph.xml

@@ -22,5 +22,13 @@
 	<fragment
 		android:id="@+id/appSettingsFragment"
 		android:name="su.xash.engine.ui.settings.AppSettingsFragment"
-		android:label="@string/app_settings" />
+		android:label="@string/app_settings">
+		<action
+			android:id="@+id/action_appSettingsFragment_to_crashLogsFragment"
+			app:destination="@id/crashLogsFragment" />
+	</fragment>
+	<fragment
+		android:id="@+id/crashLogsFragment"
+		android:name="su.xash.engine.ui.settings.CrashLogsFragment"
+		android:label="@string/crash_logs" />
 </navigation>

android/app/src/main/res/raw/isrgrootx1.pem

@@ -0,0 +1,31 @@
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----

android/app/src/main/res/values-ru/strings.xml

@@ -23,4 +23,27 @@
 	<string name="game_apk_required">Требуется APK с игровыми библиотеками</string>
 	<string name="game_apk_message">Чтобы запустить эту игру, нужно установить дополнительный APK</string>
 	<string name="game_apk_install">Скачать</string>
+	<string name="crash_dialog_title">Xash3D FWGS аварийно завершился в прошлый раз</string>
+	<string name="crash_send_to_developers">Отправить разработчикам</string>
+	<string name="crash_share">Поделиться</string>
+	<string name="crash_dismiss">Закрыть</string>
+	<string name="crash_logs">Журналы сбоев</string>
+	<string name="crash_logs_empty">Нет сохранённых журналов сбоев</string>
+	<string name="crash_log_delete">Удалить</string>
+	<string name="downloading_game_libs">Загрузка игровых библиотек</string>
+	<string name="downloading">Загрузка…</string>
+	<string name="download_progress">Загрузка… %1$d%%</string>
+	<string name="download_failed">Ошибка загрузки</string>
+	<string name="download_error">Произошла ошибка при загрузке игровых библиотек.</string>
+	<string name="update_available">Доступно обновление</string>
+	<string name="update_available_message">Доступна более новая версия игровых библиотек. Загрузить обновление?</string>
+	<string name="update_download">Обновить</string>
+	<string name="update_skip">Пропустить</string>
+	<string name="manifest_error_title">Не удалось связаться с сервером игровых библиотек</string>
+	<string name="manifest_error_message">Не удалось загрузить манифест сборок:\n\n%1$s\n\nИгровые библиотеки сейчас недоступны для загрузки. Можно запустить движок и без них, но он, скорее всего, не найдёт игровые DLL.</string>
+	<string name="launch_anyway">Запустить всё равно</string>
+	<string name="source_repo">Репозиторий исходников</string>
+	<string name="source_branch">Ветка</string>
+	<string name="source_commit">Коммит</string>
+	<string name="downloaded_at">Загружено</string>
 </resources>

android/app/src/main/res/values/strings.xml

@@ -24,4 +24,28 @@
 	<string name="game_apk_required">Game code APK required</string>
 	<string name="game_apk_message">To launch this game, you need additional APK installed</string>
 	<string name="game_apk_install">Download</string>
+	<string name="crash_dialog_title">Xash3D FWGS crashed last time</string>
+	<string name="crash_send_to_developers">Send to developers</string>
+	<string name="crash_share">Share</string>
+	<string name="crash_dismiss">Dismiss</string>
+	<string name="crash_logs">Crash logs</string>
+	<string name="crash_logs_empty">No crash logs recorded</string>
+	<string name="crash_log_delete">Delete</string>
+	<string name="crash_email_subject" translatable="false">Xash3D FWGS crash report</string>
+	<string name="downloading_game_libs">Downloading Game Libraries</string>
+	<string name="downloading">Downloading…</string>
+	<string name="download_progress">Downloading… %1$d%%</string>
+	<string name="download_failed">Download Failed</string>
+	<string name="download_error">An error occurred while downloading game libraries.</string>
+	<string name="update_available">Update Available</string>
+	<string name="update_available_message">A newer version of the game libraries is available. Download the update?</string>
+	<string name="update_download">Update</string>
+	<string name="update_skip">Skip</string>
+	<string name="manifest_error_title">Cannot reach game library server</string>
+	<string name="manifest_error_message">Failed to download the build manifest:\n\n%1$s\n\nGame libraries cannot be downloaded right now. You can launch the engine anyway, but it likely won\'t find the game DLLs.</string>
+	<string name="launch_anyway">Launch anyway</string>
+	<string name="source_repo">Source repository</string>
+	<string name="source_branch">Branch</string>
+	<string name="source_commit">Commit</string>
+	<string name="downloaded_at">Downloaded</string>
 </resources>

android/app/src/main/res/xml/app_preferences.xml

@@ -11,4 +11,8 @@
 		app:key="use_icons"
 		app:layout="@layout/switch_preference"
 		app:title="@string/preferences_use_icons" />
+
+	<Preference
+		app:key="crash_logs"
+		app:title="@string/crash_logs" />
 </PreferenceScreen>

android/app/src/main/res/xml/game_preferences.xml

@@ -46,4 +46,28 @@
 		app:title="@string/preferences_server_package"
 		app:useSimpleSummaryProvider="true"
 		app:isPreferenceVisible="false" />
+
+	<Preference
+		app:key="source_url"
+		app:layout="@layout/edit_text_preference"
+		app:title="@string/source_repo"
+		app:isPreferenceVisible="false" />
+
+	<Preference
+		app:key="source_branch"
+		app:layout="@layout/edit_text_preference"
+		app:title="@string/source_branch"
+		app:isPreferenceVisible="false" />
+
+	<Preference
+		app:key="source_commit"
+		app:layout="@layout/edit_text_preference"
+		app:title="@string/source_commit"
+		app:isPreferenceVisible="false" />
+
+	<Preference
+		app:key="downloaded_at"
+		app:layout="@layout/edit_text_preference"
+		app:title="@string/downloaded_at"
+		app:isPreferenceVisible="false" />
 </PreferenceScreen>

android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+	<base-config>
+		<trust-anchors>
+			<certificates src="system"/>
+			<certificates src="@raw/isrgrootx1"/>
+		</trust-anchors>
+	</base-config>
+</network-security-config>

android/app/src/main/res/xml/provider_paths.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+	<files-path name="crashes" path="crashes/" />
+</paths>

common/com_image.h

@@ -87,6 +87,7 @@ typedef enum
 	IL_LOAD_PLAYER_DECAL = BIT(7), // special mode for player decals
 	IL_KTX2_RAW = BIT(8), // renderer can consume raw KTX2 files (e.g. ref_vk)
 	IL_ALLOW_WAD3_LUMA = BIT(9), // allow usage of luma textures in wad3 (tilde textures)
+	IL_HOST_ENDIAN = BIT(10), // buffer is already in host endian, skip byte-swapping
 } ilFlags_t;
 
 // goes into rgbdata_t->encode

common/q_client.h

@@ -22,6 +22,9 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #ifndef QUAKE_CLIENT_H
 #define QUAKE_CLIENT_H
 
+#include <stdint.h>
+#include "xash3d_types.h"
+
 // Definitions originally taken from Quake, modified for binary compatibility
 
 typedef struct usercmd_s

common/xash3d_types.h

@@ -243,7 +243,10 @@ typedef int qboolean;
 #define Swap32Store( x ) ( x = Swap32( x ))
 #define Swap16Store( x ) ( x = Swap16( x ))
 
-#ifdef XASH_BIG_ENDIAN
+#define LittleFourCC( a, b, c, d ) (((uint32_t)( d ) << 24 ) | ((uint32_t)( c ) << 16 ) | ((uint32_t)( b ) << 8 ) | (uint32_t)( a ))
+#define BigFourCC( a, b, c, d )    (((uint32_t)( a ) << 24 ) | ((uint32_t)( b ) << 16 ) | ((uint32_t)( c ) << 8 ) | (uint32_t)( d ))
+
+#if XASH_BIG_ENDIAN
 	#define LittleLong( x )    Swap32( x )
 	#define LittleShort( x )   Swap16( x )
 	#define LittleLongSW( x )  Swap32Store( x )
@@ -252,6 +255,7 @@ typedef int qboolean;
 	#define BigLong( x )  ( x )
 	#define BigShort( x ) ( x )
 	#define BigFloat( x ) ( x )
+	#define HostFourCC( a, b, c, d ) BigFourCC( a, b, c, d )
 #else
 	#define LittleLong( x )  ( x )
 	#define LittleShort( x )  ( x )
@@ -261,6 +265,7 @@ typedef int qboolean;
 	#define BigLong( x )  Swap32( x )
 	#define BigShort( x ) Swap16( x )
 	#define BigFloat( x ) SwapFloat( x )
+	#define HostFourCC( a, b, c, d ) LittleFourCC( a, b, c, d )
 #endif
 
 #endif // XASH_TYPES_H

engine/client/cl_efx.c

@@ -1239,8 +1239,8 @@ particle spray
 void GAME_EXPORT R_Blood( const vec3_t org, const vec3_t ndir, int pcolor, int speed )
 {
 	vec3_t		pos, dir, vec;
-	float		pspeed = speed * 3.0f;
 	int		i, j;
+	int		pspeed = speed * 3;
 	particle_t	*p;
 
 	VectorNormalize2( ndir, dir );
@@ -1250,7 +1250,7 @@ void GAME_EXPORT R_Blood( const vec3_t org, const vec3_t ndir, int pcolor, int s
 		VectorAddScalar( org, COM_RandomFloat( -3.0f, 3.0f ), pos );
 		VectorAddScalar( dir, COM_RandomFloat( -0.06f, 0.06f ), vec );
 
-		for( j = 0; j < 7; j++ )
+		for( j = 0; j < 8; j++ )
 		{
 			p = R_AllocParticle( NULL );
 			if( !p ) return;
@@ -1262,6 +1262,8 @@ void GAME_EXPORT R_Blood( const vec3_t org, const vec3_t ndir, int pcolor, int s
 			VectorAddScalar( pos, COM_RandomFloat( -1.0f, 1.0f ), p->org );
 			VectorScale( vec, pspeed, p->vel );
 		}
+
+		pspeed -= speed;
 	}
 }
 
@@ -1333,10 +1335,7 @@ void GAME_EXPORT R_BloodStream( const vec3_t org, const vec3_t ndir, int pcolor,
 			p->color = pcolor + COM_RandomLong( 0, 9 );
 			p->type = pt_4x_slowgrav;
 
-			p->org[0] = org[0] + COM_RandomFloat( -1.0f, 1.0f );
-			p->org[1] = org[1] + COM_RandomFloat( -1.0f, 1.0f );
-			p->org[2] = org[2] + COM_RandomFloat( -1.0f, 1.0f );
-
+			VectorAddScalar( org, COM_RandomFloat( -1.0f, 1.0f ), p->org );
 			VectorCopy( dir, p->vel );
 			p->vel[2] -= arc;
 

engine/client/cl_font.c

@@ -17,6 +17,20 @@ GNU General Public License for more details.
 #include "filesystem.h"
 #include "client.h"
 #include "qfont.h"
+#include "swaplib.h"
+
+le_struct_begin( charinfo_swap )
+	le_struct_field( charinfo, startoffset )
+	le_struct_field( charinfo, charwidth )
+le_struct_end();
+
+le_struct_begin( qfont_swap )
+	le_struct_field( qfont_t, width )
+	le_struct_field( qfont_t, height )
+	le_struct_field( qfont_t, rowcount )
+	le_struct_field( qfont_t, rowheight )
+	le_struct_array_child( qfont_t, fontinfo, charinfo_swap, NUM_GLYPHS )
+le_struct_end();
 
 qboolean CL_FixedFont( cl_font_t *font )
 {
@@ -130,6 +144,7 @@ qboolean Con_LoadVariableWidthFont( const char *fontname, cl_font_t *font, float
 	}
 
 	memcpy( &src, pfile, sizeof( src ));
+	le_struct_swap( qfont_swap, &src );
 	Mem_Free( pfile );
 
 	font->hFontTexture = CL_LoadFontTexture( fontname, texFlags, &font_width );

engine/client/cl_main.c

@@ -1174,7 +1174,7 @@ static void CL_SendConnectPacket( connprotocol_t proto, int challenge )
 	else
 	{
 		const char *qport = Cvar_VariableString( "net_qport" );
-		int extensions = Host_IsLocalGame() ? 0 : NET_EXT_SPLITSIZE;
+		int extensions = adrtype == NA_LOOPBACK ? 0 : NET_EXT_SPLITSIZE;
 		string key;
 
 		ID_GetMD5ForAddress( key, adr, sizeof( key ));
@@ -1385,6 +1385,10 @@ static void CL_CreateResourceList( void )
 	cl.num_resources = 0;
 	memset( rgucMD5_hash, 0, sizeof( rgucMD5_hash ));
 
+	ClearBits( cl_logofile.flags, FCVAR_CHANGED );
+	ClearBits( cl_logocolor.flags, FCVAR_CHANGED );
+	ClearBits( cl_logoext.flags, FCVAR_CHANGED );
+
 	// sanitize cvar value
 	if( Q_strcmp( cl_logoext.string, "bmp" ) && Q_strcmp( cl_logoext.string, "png" ))
 		Cvar_DirectSet( &cl_logoext, "bmp" );
@@ -1400,7 +1404,6 @@ static void CL_CreateResourceList( void )
 	if( !fp )
 		return;
 
-	MD5_HashFile( rgucMD5_hash, szFileName, NULL );
 	nSize = FS_FileLength( fp );
 
 	if( nSize != 0 )
@@ -1409,6 +1412,7 @@ static void CL_CreateResourceList( void )
 
 		if( pNewResource )
 		{
+			MD5_HashFile( rgucMD5_hash, szFileName, NULL );
 			SetBits( pNewResource->ucFlags, RES_CUSTOM );
 			memcpy( pNewResource->rgucMD5_hash, rgucMD5_hash, 16 );
 			HPAK_AddLump( false, hpk_custom_file.string, pNewResource, NULL, fp );
@@ -1418,6 +1422,42 @@ static void CL_CreateResourceList( void )
 	FS_Close( fp );
 }
 
+/*
+==================
+CL_CheckLogoChanged
+
+==================
+*/
+static void CL_CheckLogoChanged( void )
+{
+	player_info_t	*player;
+	int		i;
+
+	if( cls.state != ca_active )
+		return;
+
+	if( !FBitSet( cl_logofile.flags | cl_logocolor.flags | cl_logoext.flags, FCVAR_CHANGED ))
+		return;
+
+	CL_CreateResourceList();
+
+	if( cl.num_resources == 0 )
+		return;
+
+	player = &cl.players[cl.playernum];
+	COM_ClearCustomizationList( &player->customdata, true );
+
+	for( i = 0; i < cl.num_resources; i++ )
+	{
+		resource_t *pResource = &cl.resourcelist[i];
+
+		if( !COM_CreateCustomization( &player->customdata, pResource, cl.playernum, 0, NULL, NULL ))
+			Con_Printf( "Unable to create custom decal\n" );
+	}
+
+	CL_SendResourceList( cl.resourcelist, cl.num_resources );
+}
+
 static qboolean CL_StringToProtocol( const char *s, connprotocol_t *proto )
 {
 	if( !Q_stricmp( s, "current" ) || !Q_strcmp( s, "49" ))
@@ -2543,7 +2583,7 @@ static void CL_ServerList( netadr_t from, sizebuf_t *msg )
 			MSG_ReadBytes( msg, servadr.ip, sizeof( servadr.ip ));	// 4 bytes for IP
 			NET_NetadrSetType( &servadr, NA_IP );
 		}
-		servadr.port = MSG_ReadShort( msg );			// 2 bytes for Port
+		MSG_ReadBytes( msg, &servadr.port, sizeof( servadr.port ));	// 2 bytes for Port, in network byte order
 
 		// list is ends here
 		if( !servadr.port )
@@ -2584,10 +2624,6 @@ static void CL_ConnectionlessPacket( netadr_t from, sizebuf_t *msg )
 		Con_Reportf( "%s: %s : %s\n", __func__, NET_AdrToString( from ), c );
 
 	// server connection
-	if( !Q_strcmp( c, "sb_connect" ))
-	{
-		SteamBroker_HandlePacket( from, msg );
-	}
 	if( !Q_strcmp( c, S2C_GOLDSRC_CONNECTION ) || !Q_strcmp( c, S2C_CONNECTION ))
 	{
 		CL_ClientConnect( cls.legacymode, c, from );
@@ -2818,7 +2854,7 @@ static void CL_ReadPackets( void )
 	// hot precache and downloading resources
 	if( cls.signon == SIGNONS && cl.lastresourcecheck < host.realtime )
 	{
-		double checktime = Host_IsLocalGame() ? 0.1 : 1.0;
+		double checktime = Host_IsLocalClient() ? 0.1 : 1.0;
 
 		if( !cls.dl.custom && cl.resourcesneeded.pNext != &cl.resourcesneeded )
 		{
@@ -2920,12 +2956,6 @@ void CL_ProcessFile( qboolean successfully_received, const char *filename )
 	{
 		if( filename[0] != '!' )
 			Con_Printf( "processing %s\n", filename );
-
-		if( !Q_strnicmp( filename, DEFAULT_DOWNLOADED_DIRECTORY, sizeof( DEFAULT_DOWNLOADED_DIRECTORY ) - 1 ))
-		{
-			// skip "downloaded/" part to avoid mismatch with needed resources list
-			filename += sizeof( DEFAULT_DOWNLOADED_DIRECTORY ) - 1;
-		}
 	}
 	else if( !successfully_received )
 	{
@@ -3589,6 +3619,9 @@ void Host_ClientBegin( void )
 	// finalize connection process if needs
 	CL_CheckClientState();
 
+	// check if logo cvars changed and re-upload if needed
+	CL_CheckLogoChanged();
+
 	// tell the client.dll about client data
 	CL_UpdateClientData();
 
@@ -3684,15 +3717,16 @@ void CL_Init( void )
 
 	COM_GetCommonLibraryPath( LIBRARY_CLIENT, libpath, sizeof( libpath ));
 
-	if( !CL_LoadProgs( libpath ))
-		Host_Error( "can't initialize %s: %s\n", libpath, COM_GetLibraryError( ));
-
 	S_Init();	// init sound
 	Voice_Init( VOICE_DEFAULT_CODEC, 3, true ); // init voice (do not open the device)
 
 	ID_Init();
 	SteamBroker_Init();
 
+	// client must be always initialized last so it can fetch all cvars
+	if( !CL_LoadProgs( libpath ))
+		Host_Error( "can't initialize %s: %s\n", libpath, COM_GetLibraryError( ));
+
 	cls.build_num = 0;
 	cls.initialized = true;
 	cl.maxclients = 1; // allow to drawing player in menu

engine/client/cl_steam.c

@@ -16,6 +16,8 @@ GNU General Public License for more details.
 #include <inttypes.h>
 #include "common.h"
 #include "client.h"
+#include "net_ws.h"
+#include "net_ws_private.h"
 
 // What is a broker?
 // From Wikipedia, the free encyclopedia:
@@ -31,16 +33,53 @@ GNU General Public License for more details.
 // network, preferrably) on a machine that has Steam client installed, the
 // engine can communicate with it, acquiring needed information to log-in into
 // Steam protected multiplayer servers.
+
+// Protocol constants
+#define SBRK_FRAME_HEADER			"SBRK"
+#define SBRK_FRAME_HEADER_SIZE		(sizeof(SBRK_FRAME_HEADER) - 1)
+#define SBRK_FRAME_LENGTH_SIZE		2
+#define SBRK_RESPONSE_HEADER		"sb_connect\n"
+#define SBRK_RESPONSE_HEADER_SIZE	(sizeof(SBRK_RESPONSE_HEADER) - 1)
+#define SBRK_MAX_FRAME_SIZE			4096
+#define SBRK_CONNECT_TIMEOUT		10.0
+#define SBRK_CONNECT_RETRY_DELAY	5.0
+#define SBRK_TICKET_SIZE_MAX 		2048
+
 static CVAR_DEFINE_AUTO( cl_steam_broker_addr, "127.0.0.1:27420", FCVAR_ARCHIVE, "address of steam broker instance" );
 
-static struct
+typedef enum
+{
+	SBRK_STATE_IDLE,
+	SBRK_STATE_CONNECTING,
+	SBRK_STATE_CONNECTED,
+	SBRK_STATE_GAMESHUTDOWN
+} sbrk_state_t;
+
+typedef struct
 {
 	netadr_t adr;
+	int socket;
+	sbrk_state_t state;
 	int challenge;
 	netadr_t serveradr;
-	qboolean announced;
-	qboolean addr_initialized;
-} broker;
+	double connection_timeout;
+	double idle_cycle_timeout;
+	uint8_t rx_buffer[SBRK_MAX_FRAME_SIZE + 64];
+	uint8_t tx_buffer[SBRK_MAX_FRAME_SIZE + 64];
+	uint32_t rx_buffer_pos;
+	uint32_t tx_buffer_pos;
+} steam_broker_t;
+
+static steam_broker_t broker;
+
+static void SteamBroker_SetState( sbrk_state_t new_state )
+{
+	if( broker.state != new_state )
+	{
+		// we also may logging transitions if needed
+		broker.state = new_state;
+	}
+}
 
 static qboolean SteamBroker_UpdateBrokerAddress( void )
 {
@@ -52,28 +91,387 @@ static qboolean SteamBroker_UpdateBrokerAddress( void )
 	return true;
 }
 
+static void SteamBroker_CloseSocket( void )
+{
+	if( NET_IsSocketValid( broker.socket ))
+	{
+		closesocket( broker.socket );
+		broker.socket = INVALID_SOCKET;
+	}
+	broker.rx_buffer_pos = 0;
+	broker.tx_buffer_pos = 0;
+}
+
+static void SteamBroker_Disconnect( void )
+{
+	SteamBroker_CloseSocket();
+	SteamBroker_SetState( SBRK_STATE_IDLE );
+}
+
+static qboolean SteamBroker_ConnectImpl( void )
+{
+	int addr_family;
+	struct sockaddr_storage addr = { 0 };
+
+	if( NET_NetadrType( &broker.adr ) == NA_IP )
+	{
+		addr_family = AF_INET;
+	}
+	else if( NET_NetadrType( &broker.adr ) == NA_IP6 )
+	{
+		addr_family = AF_INET6;
+	}
+	else
+	{
+		Con_Printf( S_ERROR "%s: unsupported broker address type for %s\n", __func__, cl_steam_broker_addr.string );
+		return false;
+	}
+
+	broker.socket = socket( addr_family, SOCK_STREAM, IPPROTO_TCP );
+	if( !NET_IsSocketValid( broker.socket ))
+	{
+		Con_Printf( S_ERROR "%s: failed to create socket\n", __func__ );
+		return false;
+	}
+
+	if( !NET_MakeSocketNonBlocking( broker.socket ))
+	{
+		Con_Printf( S_ERROR "%s: failed to set non-blocking mode, error %s\n", __func__, NET_ErrorString( ));
+		SteamBroker_CloseSocket();
+		return false;
+	}
+
+	NET_NetadrToSockadr( &broker.adr, &addr );
+
+	int result = connect( broker.socket, (struct sockaddr *)&addr, NET_SockAddrLen( &addr ));
+	if( NET_IsSocketError( result ))
+	{
+		int err = WSAGetLastError();
+		if( err != WSAEWOULDBLOCK && err != WSAEALREADY && err != WSAEINPROGRESS )
+		{
+			Con_Printf( S_ERROR "%s: failed to connect to broker at %s with error %s\n", __func__, cl_steam_broker_addr.string, NET_ErrorString( ));
+			SteamBroker_CloseSocket();
+			return false;
+		}
+	}
+
+	broker.connection_timeout = Platform_DoubleTime() + SBRK_CONNECT_TIMEOUT;
+	SteamBroker_SetState( SBRK_STATE_CONNECTING );
+	return true;
+}
+
+static qboolean SteamBroker_SendFrame( const char *payload, size_t payload_size )
+{
+	if( payload_size > SBRK_MAX_FRAME_SIZE )
+	{
+		Con_Printf( S_WARN "%s: payload too large (%zu > %u)\n", __func__, payload_size, SBRK_MAX_FRAME_SIZE );
+		return false;
+	}
+
+	uint8_t frame[SBRK_MAX_FRAME_SIZE + 6];
+	sizebuf_t sb;
+
+	MSG_Init( &sb, "SteamBroker_SendFrame", frame, sizeof( frame ));
+
+	MSG_WriteBytes( &sb, SBRK_FRAME_HEADER, SBRK_FRAME_HEADER_SIZE );
+	MSG_WriteShort( &sb, payload_size );
+	MSG_WriteBytes( &sb, payload, payload_size );
+
+	size_t frame_size = MSG_GetRealBytesWritten( &sb );
+	int sent = send( broker.socket, (const char *)frame, frame_size, 0 );
+	if( NET_IsSocketError( sent ))
+	{
+		int err = WSAGetLastError();
+		if( err != WSAEWOULDBLOCK && err != WSAEALREADY )
+		{
+			Con_Printf( S_ERROR "%s: send error %s\n", __func__, NET_ErrorString( ));
+			SteamBroker_Disconnect( );
+			return false;
+		}
+		sent = 0;
+	}
+
+	// bufferize unsent data for deferred sending
+	size_t unsent = frame_size - sent;
+	if( unsent > 0 )
+	{
+		size_t available = sizeof( broker.tx_buffer ) - broker.tx_buffer_pos;
+		if( available < unsent )
+		{
+			Con_Printf( S_ERROR "%s: transmit buffer overflow (%zu > %zu)\n", __func__, unsent, available );
+			SteamBroker_Disconnect( );
+			return false;
+		}
+
+		memcpy( broker.tx_buffer + broker.tx_buffer_pos, frame + sent, unsent );
+		broker.tx_buffer_pos += unsent;
+	}
+
+	return true;
+}
+
+static qboolean SteamBroker_ProcessFrame( void )
+{
+	if( broker.rx_buffer_pos < SBRK_FRAME_HEADER_SIZE + SBRK_FRAME_LENGTH_SIZE )
+		return false;
+
+	sizebuf_t sb;
+	MSG_Init( &sb, "SteamBroker_ProcessFrame", broker.rx_buffer, broker.rx_buffer_pos );
+
+	// verify frame header
+	char header[SBRK_FRAME_HEADER_SIZE];
+	if( !MSG_ReadBytes( &sb, header, SBRK_FRAME_HEADER_SIZE ))
+		return false;
+
+	if( memcmp( header, SBRK_FRAME_HEADER, SBRK_FRAME_HEADER_SIZE ) != 0 )
+	{
+		Con_Printf( S_ERROR "%s: invalid frame header\n", __func__ );
+		SteamBroker_Disconnect( );
+		return false;
+	}
+
+	uint16_t payload_size = MSG_ReadShort( &sb );
+	uint32_t frame_size = SBRK_FRAME_HEADER_SIZE + SBRK_FRAME_LENGTH_SIZE + payload_size;
+
+	if( MSG_GetNumBytesLeft( &sb ) < payload_size )
+		return false; // need more data
+
+	char response_header[SBRK_RESPONSE_HEADER_SIZE];
+	if( MSG_ReadBytes( &sb, response_header, SBRK_RESPONSE_HEADER_SIZE ))
+	{
+		if( memcmp( response_header, SBRK_RESPONSE_HEADER, SBRK_RESPONSE_HEADER_SIZE ) == 0 )
+		{
+			int32_t challenge = MSG_ReadLong( &sb );
+			if( broker.challenge != challenge )
+			{
+				Con_Printf( S_ERROR "%s: challenge mismatch\n", __func__ );
+			}
+			else
+			{
+				uint64_t steam_id;
+				MSG_ReadBytes( &sb, &steam_id, sizeof( steam_id ));
+				uint32_t ticket_size = MSG_ReadDword( &sb );
+				uint8_t ticket_data[SBRK_TICKET_SIZE_MAX];
+
+				if( ticket_size > SBRK_TICKET_SIZE_MAX )
+				{
+					Con_Printf( S_ERROR "%s: ticket size exceeds limit (%u)\n", __func__, ticket_size );
+				}
+				else if( MSG_ReadBytes( &sb, ticket_data, ticket_size ))
+				{
+					Con_Printf( "%s: SteamID: %"PRIu64", ticket: [%d, %d, %d, %d...]\n", __func__, steam_id, ticket_data[0], ticket_data[1], ticket_data[2], ticket_data[3] );
+
+					memcpy( cls.steamid, &steam_id, sizeof( cls.steamid ));
+					CL_SendGoldSrcConnectPacket( broker.serveradr, broker.challenge, ticket_data, ticket_size );
+					cls.broker_wait = false;
+				}
+				else
+				{
+					Con_Printf( S_ERROR "%s: failed to read ticket data\n", __func__ );
+				}
+			}
+		}
+	}
+	
+	// remove processed frame from buffer
+	memmove( broker.rx_buffer, broker.rx_buffer + frame_size, broker.rx_buffer_pos - frame_size );
+	broker.rx_buffer_pos -= frame_size;
+
+	return true;
+}
+
+static void SteamBroker_HandleDataTx( void )
+{
+	if( broker.tx_buffer_pos == 0 )
+		return;
+
+	int sent = send( broker.socket, (const char *)broker.tx_buffer, broker.tx_buffer_pos, 0 );
+	if( NET_IsSocketError( sent ))
+	{
+		int err = WSAGetLastError();
+		if( err != WSAEWOULDBLOCK && err != WSAEALREADY )
+		{
+			Con_Printf( S_ERROR "%s: send error %s\n", __func__, NET_ErrorString( ));
+			SteamBroker_Disconnect( );
+		}
+		return;
+	}
+
+	if( sent > 0 )
+	{
+		// remove sent data from buffer
+		memmove( broker.tx_buffer, broker.tx_buffer + sent, broker.tx_buffer_pos - sent );
+		broker.tx_buffer_pos -= sent;
+	}
+}
+
+static void SteamBroker_HandleDataRx( void )
+{
+	int available = sizeof( broker.rx_buffer ) - broker.rx_buffer_pos;
+	if( available <= 0 )
+	{
+		Con_Printf( S_ERROR "%s: receive buffer overflow\n", __func__ );
+		SteamBroker_Disconnect( );
+		return;
+	}
+
+	int received = recv( broker.socket, (char *)broker.rx_buffer + broker.rx_buffer_pos, available, 0 );
+	if( NET_IsSocketError( received ))
+	{
+		int err = WSAGetLastError();
+		if( err != WSAEWOULDBLOCK && err != WSAEALREADY )
+		{
+			Con_Printf( S_ERROR "%s: recv error %s\n", __func__, NET_ErrorString( ));
+			SteamBroker_Disconnect( );
+		}
+		return;
+	}
+
+	if( received == 0 )
+	{
+		Con_Printf( S_NOTE "%s: connection closed by broker\n", __func__ );
+		SteamBroker_Disconnect( );
+		return;
+	}
+
+	broker.rx_buffer_pos += received;
+
+	while( SteamBroker_ProcessFrame( ));
+}
+
+static void SteamBroker_UpdateIdle( void )
+{
+	if( broker.idle_cycle_timeout < Platform_DoubleTime( ))
+	{
+		if( SteamBroker_UpdateBrokerAddress( ))
+		{
+			SteamBroker_ConnectImpl( );
+		}
+		else
+		{
+			Con_Printf( S_ERROR "%s: failed to resolve broker address \"%s\"\n", __func__, cl_steam_broker_addr.string );
+		}
+		broker.idle_cycle_timeout = Platform_DoubleTime() + SBRK_CONNECT_RETRY_DELAY;
+	}
+}
+
+void SteamBroker_AnnounceGameStart( const char *gamedir )
+{
+	if( Q_stricmp( cl_ticket_generator.string, "steam" ) != 0 )
+		return;
+
+	if( broker.state != SBRK_STATE_CONNECTED )
+		return;
+
+	// sb_gamedir <gamedir>
+	char buf[512];
+	int len = Q_snprintf( buf, sizeof( buf ), "sb_gamedir %s", gamedir );
+
+	if( len > 0 )
+		SteamBroker_SendFrame( buf, len );
+}
+
+void SteamBroker_AnnounceGameShutdown( void )
+{
+	if( Q_stricmp( cl_ticket_generator.string, "steam" ) != 0 )
+		return;
+
+	if( broker.state != SBRK_STATE_CONNECTED )
+		return;
+
+	SteamBroker_SendFrame( "sb_terminate", sizeof( "sb_terminate" ) - 1 );
+}
+
+static void SteamBroker_UpdateConnecting( void )
+{
+	if( Platform_DoubleTime() > broker.connection_timeout )
+	{
+		Con_Printf( S_WARN "%s: connection to %s timed out\n", __func__, cl_steam_broker_addr.string );
+		SteamBroker_Disconnect();
+		return;
+	}
+
+	fd_set writefds;
+	FD_ZERO( &writefds );
+	FD_SET( broker.socket, &writefds );
+
+	struct timeval tv;
+	tv.tv_sec = 0;
+	tv.tv_usec = 0;
+
+#if XASH_WIN32
+	int select_result = select( 0, NULL, &writefds, NULL, &tv );
+#else
+	int select_result = select( broker.socket + 1, NULL, &writefds, NULL, &tv );
+#endif
+	if( select_result == SOCKET_ERROR )
+	{
+		Con_Printf( S_ERROR "%s: select() failed\n", __func__ );
+		SteamBroker_Disconnect();
+		return;
+	}
+
+	if( FD_ISSET( broker.socket, &writefds ))
+	{
+		// socket is writable - connection established or failed
+		int err = 0;
+		socklen_t err_len = sizeof( err );
+		if( NET_IsSocketError( getsockopt( broker.socket, SOL_SOCKET, SO_ERROR, (char *)&err, &err_len )))
+		{
+			Con_Printf( S_ERROR "%s: getsockopt() failed\n", __func__ );
+			SteamBroker_Disconnect();
+			return;
+		}
+		else if( err != 0 )
+		{
+			Con_Printf( S_ERROR "%s: connection failed with error %d\n", __func__, err );
+			SteamBroker_Disconnect();
+			return;
+		}
+		else
+		{
+			broker.connection_timeout = 0;
+			Con_Printf( S_NOTE "%s: connected to broker at %s\n", __func__, cl_steam_broker_addr.string );
+			SteamBroker_SetState( SBRK_STATE_CONNECTED );
+			SteamBroker_AnnounceGameStart( GI->gamefolder );
+		}
+	}
+}
+
+static void SteamBroker_UpdateConnected( void )
+{
+	SteamBroker_HandleDataTx( );
+	SteamBroker_HandleDataRx( );
+}
+
 qboolean SteamBroker_InitiateGameConnection( netadr_t serveradr, int challenge )
 {
 	// only ipv4 supported
 	if( NET_NetadrType( &serveradr ) != NA_IP )
 		return false;
 
+	if( broker.state != SBRK_STATE_CONNECTED )
+	{
+		Con_Printf( S_WARN "%s: broker not connected\n", __func__ );
+		return false;
+	}
+
 	broker.challenge = challenge;
 	broker.serveradr = serveradr;
 
-	// sb_connect <ip:port> <server's steam id> <secure> <challenge>
-	// the message calls
+	// sb_connect <ip:port> <server_steamid> <secure> <challenge>
 	char buf[512];
-	int len = Q_snprintf( buf, sizeof( buf ), "sb_connect %s %"PRIu64" %s %d", NET_AdrToString( serveradr ), cls.server_steamid, cls.vac2_secure ? "true" : "false", broker.challenge );
+	int len = Q_snprintf( buf, sizeof( buf ), "sb_connect %s %"PRIu64" %d %d", NET_AdrToString( serveradr ), cls.server_steamid, cls.vac2_secure ? 1 : 0, challenge );
 
-	NET_SendPacket( NS_CLIENT, len, buf, broker.adr );
+	if( !SteamBroker_SendFrame( buf, len ))
+		return false;
 
 	return true;
 }
 
 void SteamBroker_TerminateGameConnection( void )
 {
-	if( NET_NetadrType( &cls.serveradr ) != NA_IP )
+	if( broker.state != SBRK_STATE_CONNECTED )
 		return;
 
 	if( Q_stricmp( cl_ticket_generator.string, "steam" ) != 0 )
@@ -83,109 +481,52 @@ void SteamBroker_TerminateGameConnection( void )
 	char buf[512];
 	int len = Q_snprintf( buf, sizeof( buf ), "sb_disconnect %s %d", NET_AdrToString( cls.serveradr ), broker.challenge );
 
-	NET_SendPacket( NS_CLIENT, len, buf, broker.adr );
-}
-
-void SteamBroker_AnnounceGameStart( const char *gamedir )
-{
-	if( Q_stricmp( cl_ticket_generator.string, "steam" ) != 0 )
-		return;
-
-	NET_Config( true, true ); // initialize sockets to be able to send packets to broker
-
-	char buf[512];
-	int len = Q_snprintf( buf, sizeof( buf ), "sb_gamedir %s", gamedir );
-
-	NET_SendPacket( NS_CLIENT, len, buf, broker.adr );
-}
-
-void SteamBroker_AnnounceGameShutdown( netadr_t broker_addr )
-{
-	NET_SendPacket( NS_CLIENT, sizeof( "sb_terminate" ) - 1, "sb_terminate", broker_addr );
+	SteamBroker_SendFrame( buf, len );
 }
 
 void SteamBroker_Frame( void )
 {
+	if( FBitSet( cl_steam_broker_addr.flags | cl_ticket_generator.flags, FCVAR_CHANGED ))
+	{
+		ClearBits( cl_ticket_generator.flags, FCVAR_CHANGED );
+		ClearBits( cl_steam_broker_addr.flags, FCVAR_CHANGED );
+
+		if( broker.state != SBRK_STATE_IDLE )
+		{
+			SteamBroker_Disconnect();
+		}
+
+		// reinitialize address
+		NET_NetadrSetType( &broker.adr, NA_UNDEFINED );
+	}
+
 	if( Q_stricmp( cl_ticket_generator.string, "steam" ) != 0 )
 		return;
 
-	qboolean restart = FBitSet( cl_steam_broker_addr.flags|cl_ticket_generator.flags, FCVAR_CHANGED );
-
-	if( !broker.addr_initialized )
+	// update state machine
+	switch( broker.state )
 	{
-		if( !SteamBroker_UpdateBrokerAddress( ))
-		{ 
-			Con_Printf( "%s: failed to resolve broker address \"%s\"\n", __func__, cl_steam_broker_addr.string );
-			return;
-		}
-		else
-		{
-			broker.addr_initialized = true;
-		}
+	case SBRK_STATE_IDLE:
+		SteamBroker_UpdateIdle( );
+		break;
+	case SBRK_STATE_CONNECTING:
+		SteamBroker_UpdateConnecting( );
+		break;
+	case SBRK_STATE_CONNECTED:
+		SteamBroker_UpdateConnected( );
+		break;
+	case SBRK_STATE_GAMESHUTDOWN:
+		// do nothing, just wait for game shutdown
+		break;
 	}
-
-	if( restart )
-	{
-		broker.announced = false;
-		ClearBits( cl_ticket_generator.flags, FCVAR_CHANGED );
-		ClearBits( cl_steam_broker_addr.flags, FCVAR_CHANGED );
-	}
-
-	if( !broker.announced )
-	{
-		netadr_t previous_addr = broker.adr;
-		if( !SteamBroker_UpdateBrokerAddress( ))
-		{ 
-			Con_Printf( "%s: failed to resolve broker address \"%s\"\n", __func__, cl_steam_broker_addr.string );
-		}
-		else
-		{
-			if( restart )
-			{
-				// terminate old steam broker if instance address has changed
-				SteamBroker_AnnounceGameShutdown( previous_addr ); 
-			}
-			SteamBroker_AnnounceGameStart( GI->gamefolder );
-		}
-		broker.announced = true;
-	}
-}
-
-void SteamBroker_HandlePacket( netadr_t from, sizebuf_t *msg )
-{
-	// message format
-	// sb_connect\n<4 byte challenge><8 byte steamid><unsigned 4 byte len><len bytes ticket>
-	int challenge;
-	uint32_t len;
-	uint8_t ticket[2048]; // 2048 bytes according to SDK docs
-
-	if( !NET_CompareAdr( from, broker.adr ))
-		return;
-
-	challenge = MSG_ReadLong( msg );
-
-	if( broker.challenge != challenge ) // TODO: print error
-		return;
-
-	MSG_ReadBytes( msg, cls.steamid, sizeof( cls.steamid ));
-
-	len = MSG_ReadDword( msg );
-	if( len > sizeof( ticket )) // TODO: print error, proceed without ticket?
-		return;
-
-	MSG_ReadBytes( msg, ticket, len );
-
-	Con_Printf( "%s: SteamID: %"PRIu64", ticket: [%d, %d, %d, %d...]\n", __func__, *(uint64_t *)cls.steamid, ticket[0], ticket[1], ticket[2], ticket[3] );
-
-	CL_SendGoldSrcConnectPacket( broker.serveradr, challenge, ticket, len );
-
-	cls.broker_wait = false;
 }
 
 void SteamBroker_Init( void )
 {
-	broker.announced = false;
-	broker.addr_initialized = false;
+	broker.state = SBRK_STATE_IDLE;
+	broker.socket = INVALID_SOCKET;
+	broker.rx_buffer_pos = 0;
+	broker.tx_buffer_pos = 0;
 	Cvar_RegisterVariable( &cl_steam_broker_addr );
 	NET_NetadrSetType( &broker.adr, NA_UNDEFINED );
 }
@@ -195,5 +536,6 @@ void SteamBroker_Shutdown( void )
 	if( Q_stricmp( cl_ticket_generator.string, "steam" ) != 0 )
 		return;
 
-	SteamBroker_AnnounceGameShutdown( broker.adr );
+	SteamBroker_AnnounceGameShutdown( );
+	SteamBroker_SetState( SBRK_STATE_GAMESHUTDOWN );
 }

engine/client/client.h

@@ -761,6 +761,7 @@ void CL_AddToResourceList( resource_t *pResource, resource_t *pList );
 void CL_RemoveFromResourceList( resource_t *pResource );
 void CL_MoveToOnHandList( resource_t *pResource );
 void CL_ClearResourceLists( void );
+void CL_SendResourceList( const resource_t *list, int count );
 
 //
 // cl_debug.c
@@ -1207,8 +1208,7 @@ void CL_GetSecuredClientAPI( CL_EXPORT_FUNCS F );
 void SteamBroker_Init( void );
 void SteamBroker_Shutdown( void );
 void SteamBroker_Frame( void );
-void SteamBroker_HandlePacket( netadr_t from, sizebuf_t *msg );
-int SteamBroker_InitiateGameConnection( netadr_t serveradr, int challenge );
+qboolean SteamBroker_InitiateGameConnection( netadr_t serveradr, int challenge );
 void SteamBroker_TerminateGameConnection( void );
 
 //

engine/client/dll_int/cl_game.c

@@ -4132,6 +4132,7 @@ qboolean CL_LoadProgs( const char *name )
 	clgame.dllFuncs.pfnInit();
 
 	CL_InitStudioAPI();
+	S_InitSoundAPI();
 
 	return true;
 }

engine/client/dll_int/cl_gameui.c

@@ -188,7 +188,7 @@ void UI_ShowConnectionWarning( void )
 	if( cls.state != ca_connected )
 		return;
 
-	if( Host_IsLocalClient() )
+	if( Host_IsLocalClient( ))
 		return;
 
 	if( ++cl.lostpackets == 8 )

engine/client/dll_int/cl_render.c

@@ -172,8 +172,8 @@ intptr_t CL_RenderGetParm( const int parm, const int arg, const qboolean checkRe
 			return cl.local.waterlevel;
 		case PARM_LOCAL_HEALTH:
 			return cl.local.health;
-		case PARM_LOCAL_GAME:
-			return Host_IsLocalGame();
+		case PARM_SINGLEPLAYER_GAME:
+			return Host_IsSinglePlayerGame();
 		case PARM_NUMENTITIES:
 			return pfnNumberOfEntities();
 		case PARM_GET_CLIENT_PTR:

engine/client/dll_int/ref_common.c

@@ -496,61 +496,57 @@ static void CL_FillTriAPI( triangleapi_t *dst )
 	ref.dllFuncs.R_FillTriAPI( dst );
 }
 
-static const byte dottexture[8][8] =
-{
-	{ 0, 1, 1, 0, 0, 0, 0, 0 },
-	{ 1, 1, 1, 1, 0, 0, 0, 0 },
-	{ 1, 1, 1, 1, 0, 0, 0, 0 },
-	{ 0, 1, 1, 0, 0, 0, 0, 0 },
-	{ 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ 0, 0, 0, 0, 0, 0, 0, 0 },
-};
-
 static void R_CreateBuiltinTextures( void )
 {
-	uint	data4x4[16];
-	uint	data16x16[256];
-	byte	particle[8 * 8 * 4];
-	int	x, y;
-
 	// default checkerboard
-	for( y = 0; y < 16; y++ )
+	uint data16x16[256];
+	for( int y = 0; y < 16; y++ )
 	{
-		for( x = 0; x < 16; x++ )
+		for( int x = 0; x < 16; x++ )
 		{
 			if(( y < 8 ) ^ ( x < 8 ))
-				data16x16[y * 16 + x] = 0xFFFF00FF;
+				data16x16[y * 16 + x] = HostFourCC( 255, 0, 255, 255 );
 			else
-				data16x16[y * 16 + x] = 0xFF000000;
+				data16x16[y * 16 + x] = HostFourCC( 0, 0, 0, 255 );
 		}
 	}
-	ref.dllFuncs.GL_CreateTexture( REF_DEFAULT_TEXTURE, 16, 16, data16x16, TF_COLORMAP );
+	ref.dllFuncs.GL_CreateTexture( REF_DEFAULT_TEXTURE, 16, 16, data16x16, 0 );
 
 	// particle texture
-	memset( particle, 0, sizeof( particle ));
-	for( x = 0; x < 8; x++ )
+	uint particle[64];
+	for( int y = 0; y < 8; y++ )
 	{
-		for( y = 0; y < 8; y++ )
+		for( int x = 0; x < 8; x++ )
+			particle[y * 8 + x] = HostFourCC( 255, 255, 255, 0 ); // fill it with invisible white
+	}
+
+	// a1ba: moved one pixel down and to the right to make it look better with linear interpolation
+	// set to 0 to make it look like in goldsrc
+	const int corner = 1;
+	for( int y = corner; y < 4 + corner; y++ )
+	{
+		for( int x = corner; x < 4 + corner; x++ )
 		{
-			if( dottexture[x][y] )
-				particle[( y * 8 + x ) * 4 + 3] = 255;
+			if(( x == corner || x == 3 + corner ) && ( y == corner || y == 3 + corner ))
+				continue;
+
+			particle[y * 8 + x] = HostFourCC( 255, 255, 255, 255 );
 		}
 	}
-	ref.dllFuncs.GL_CreateTexture( REF_PARTICLE_TEXTURE, 8, 8, particle, TF_CLAMP );
+	ref.dllFuncs.GL_CreateTexture( REF_PARTICLE_TEXTURE, 8, 8, particle, TF_CLAMP|TF_HAS_ALPHA );
 
 	// solid colors
+	uint data4x4[16];
 	memset( data4x4, 0xFF, sizeof( data4x4 ));
-	ref.dllFuncs.GL_CreateTexture( REF_WHITE_TEXTURE, 4, 4, data4x4, TF_COLORMAP );
+	ref.dllFuncs.GL_CreateTexture( REF_WHITE_TEXTURE, 4, 4, data4x4, 0 );
 
-	for( x = 0; x < 16; x++ )
-		data4x4[x] = 0xFF7F7F7F;
-	ref.dllFuncs.GL_CreateTexture( REF_GRAY_TEXTURE, 4, 4, data4x4, TF_COLORMAP );
+	for( int x = 0; x < 16; x++ )
+		data4x4[x] = HostFourCC( 127, 127, 127, 255 );
+	ref.dllFuncs.GL_CreateTexture( REF_GRAY_TEXTURE, 4, 4, data4x4, 0 );
 
-	for( x = 0; x < 16; x++ )
-		data4x4[x] = 0xFF000000;
-	ref.dllFuncs.GL_CreateTexture( REF_BLACK_TEXTURE, 4, 4, data4x4, TF_COLORMAP );
+	for( int x = 0; x < 16; x++ )
+		data4x4[x] = HostFourCC( 0, 0, 0, 255 );
+	ref.dllFuncs.GL_CreateTexture( REF_BLACK_TEXTURE, 4, 4, data4x4, 0 );
 }
 
 static qboolean R_LoadProgs( const char *name )

engine/client/input/in_joy.c

@@ -68,6 +68,7 @@ static CVAR_DEFINE_AUTO( joy_gyro_roll, "0.0", FCVAR_ARCHIVE | FCVAR_FILTERABLE,
 static CVAR_DEFINE_AUTO( joy_gyro_pitch_deadzone, "0.5", FCVAR_ARCHIVE | FCVAR_FILTERABLE, "gyroscope pitch axis deadzone (deg/s)" );
 static CVAR_DEFINE_AUTO( joy_gyro_yaw_deadzone, "0.5", FCVAR_ARCHIVE | FCVAR_FILTERABLE, "gyroscope yaw axis deadzone (deg/s)" );
 static CVAR_DEFINE_AUTO( joy_gyro_roll_deadzone, "0.5", FCVAR_ARCHIVE | FCVAR_FILTERABLE, "gyroscope roll axis deadzone (deg/s)" );
+static CVAR_DEFINE_AUTO( joy_gyro_enable, "1", FCVAR_ARCHIVE | FCVAR_FILTERABLE, "enables aiming with gamepad gyroscope" );
 static CVAR_DEFINE_AUTO( joy_debug, "0", 0, "visualize gamepad axes and buttons" );
 
 // stores the latest instantaneous gyroscope rotation rates (in rad/s) from platform input
@@ -340,7 +341,7 @@ void Joy_FinalizeMove( float *fw, float *side, float *dpitch, float *dyaw )
 	*dpitch += joy_pitch.value * (float)joyaxis[JOY_AXIS_PITCH].val/(float)SHRT_MAX * host.realframetime;
 	*dyaw   -= joy_yaw.value   * (float)joyaxis[JOY_AXIS_YAW  ].val/(float)SHRT_MAX * host.realframetime;
 
-	if( joy_have_gyro.value && (int)joy_calibrated.value == JOY_CALIBRATED )
+	if( joy_gyro_enable.value && joy_have_gyro.value && (int)joy_calibrated.value == JOY_CALIBRATED )
 	{
 		float pitch_speed = joy_gyro_speed[0] * ( 180.0f / M_PI );
 		float yaw_speed   = joy_gyro_speed[1] * ( 180.0f / M_PI );
@@ -596,6 +597,7 @@ void Joy_Init( void )
 	Cvar_RegisterVariable( &joy_have_gyro );
 	Cvar_RegisterVariable( &joy_calibrated );
 	Cvar_RegisterVariable( &joy_enable );
+	Cvar_RegisterVariable( &joy_gyro_enable );
 
 	Cvar_RegisterVariable( &joy_gyro_pitch );
 	Cvar_RegisterVariable( &joy_gyro_yaw );

engine/client/parse/cl_parse.c

@@ -705,13 +705,35 @@ CL_ParseResourceRequest
 
 ==================
 */
-static void CL_ParseResourceRequest( sizebuf_t *msg )
+void CL_SendResourceList( const resource_t *list, int count )
 {
 	byte	buffer[MAX_INIT_MSG];
-	int	i, arg, nStartIndex;
 	sizebuf_t	sbuf;
+	int	i;
 
 	MSG_Init( &sbuf, "ResourceBlock", buffer, sizeof( buffer ));
+	MSG_BeginClientCmd( &sbuf, clc_resourcelist );
+	MSG_WriteShort( &sbuf, count );
+
+	for( i = 0; i < count; i++ )
+	{
+		MSG_WriteString( &sbuf, list[i].szFileName );
+		MSG_WriteByte( &sbuf, list[i].type );
+		MSG_WriteShort( &sbuf, list[i].nIndex );
+		MSG_WriteLong( &sbuf, list[i].nDownloadSize );
+		MSG_WriteByte( &sbuf, list[i].ucFlags );
+
+		if( FBitSet( list[i].ucFlags, RES_CUSTOM ))
+			MSG_WriteBytes( &sbuf, list[i].rgucMD5_hash, 16 );
+	}
+
+	Netchan_CreateFragments( &cls.netchan, &sbuf );
+	Netchan_FragSend( &cls.netchan );
+}
+
+static void CL_ParseResourceRequest( sizebuf_t *msg )
+{
+	int	arg, nStartIndex;
 
 	arg = MSG_ReadLong( msg );
 	nStartIndex = MSG_ReadLong( msg );
@@ -719,31 +741,10 @@ static void CL_ParseResourceRequest( sizebuf_t *msg )
 	if( cl.servercount != arg )
 		return;
 
-	if( nStartIndex < 0 && nStartIndex > cl.num_resources )
+	if( nStartIndex < 0 || nStartIndex >= cl.num_resources )
 		return;
 
-	MSG_BeginClientCmd( &sbuf, clc_resourcelist );
-	MSG_WriteShort( &sbuf, cl.num_resources );
-
-	for( i = nStartIndex; i < cl.num_resources; i++ )
-	{
-		MSG_WriteString( &sbuf, cl.resourcelist[i].szFileName );
-		MSG_WriteByte( &sbuf, cl.resourcelist[i].type );
-		MSG_WriteShort( &sbuf, cl.resourcelist[i].nIndex );
-		MSG_WriteLong( &sbuf, cl.resourcelist[i].nDownloadSize );
-		MSG_WriteByte( &sbuf, cl.resourcelist[i].ucFlags );
-
-		if( FBitSet( cl.resourcelist[i].ucFlags, RES_CUSTOM ))
-			MSG_WriteBytes( &sbuf, cl.resourcelist[i].rgucMD5_hash, 16 );
-	}
-
-	// a1ba: useless check? MSG_BeginClientCmd and MSG_WriteShort will always
-	// write to the buffer
-	// if( MSG_GetNumBytesWritten( &sbuf ) > 0 )
-	{
-		Netchan_CreateFragments( &cls.netchan, &sbuf );
-		Netchan_FragSend( &cls.netchan );
-	}
+	CL_SendResourceList( &cl.resourcelist[nStartIndex], cl.num_resources - nStartIndex );
 }
 
 /*

engine/client/sound.h

@@ -99,6 +99,7 @@ void SX_RoomFX( portable_samplepair_t *paint, int num_samples );
 void SX_ClearState( void );
 
 qboolean S_Init( void );
+qboolean S_InitSoundAPI( void );
 void S_Shutdown( void );
 void S_SoundList_f( void );
 void S_SoundInfo_f( void );

engine/client/sound/s_main.c

@@ -1948,7 +1948,7 @@ static const sound_api_t gSoundAPI = {
 S_InitSoundAPI
 ================
 */
-static qboolean S_InitSoundAPI( void )
+qboolean S_InitSoundAPI( void )
 {
 	// make sure what sound functions is cleared
 	memset( &clgame.soundFuncs, 0, sizeof( clgame.soundFuncs ));
@@ -1967,6 +1967,9 @@ static qboolean S_InitSoundAPI( void )
 		memset( &clgame.soundFuncs, 0, sizeof( clgame.soundFuncs ));
 	}
 
+	if( clgame.soundFuncs.pfnS_Init )
+		clgame.soundFuncs.pfnS_Init( &snd );
+
 	return false;
 }
 
@@ -2030,17 +2033,15 @@ qboolean S_Init( void )
 	S_InitSounds ();
 	VOX_Init ();
 
-	S_InitSoundAPI();
-
-	if( clgame.soundFuncs.pfnS_Init )
-		clgame.soundFuncs.pfnS_Init( &snd );
-
 	return true;
 }
 
-// =======================================================================
-// Shutdown sound engine
-// =======================================================================
+/*
+============
+S_Shutdown
+
+============
+*/
 void S_Shutdown( void )
 {
 	if( !snd.initialized ) return;

engine/client/sound/s_mix.c

@@ -233,7 +233,7 @@ static int VOX_MixChannelToBuffer( portable_samplepair_t *pbuf, channel_t *chan,
 
 static int S_MixNormalChannels( portable_samplepair_t *dst, int end, int rate )
 {
-	const qboolean local = Host_IsLocalGame();
+	const qboolean sp = Host_IsSinglePlayerGame();
 	const qboolean ingame = CL_IsInGame();
 	const int num_samples = ( end - snd.paintedtime ) / ( SOUND_DMA_SPEED / rate );
 
@@ -261,7 +261,7 @@ static int S_MixNormalChannels( portable_samplepair_t *dst, int end, int rate )
 			{
 				// play, playvol
 			}
-			else if(( cls.key_dest == key_menu || cl.paused ) && !FBitSet( ch->flags, FL_CHAN_LOCAL_SOUND ) && local )
+			else if(( cls.key_dest == key_menu || cl.paused ) && !FBitSet( ch->flags, FL_CHAN_LOCAL_SOUND ) && sp )
 			{
 				// play only local sounds, keep pause for other
 				continue;

engine/client/sound/s_vox.c

@@ -403,11 +403,11 @@ static qboolean VOX_ParseWordParams( char *psz, voxword_t *pvoxword, voxword_t *
 
 		command = *psz++;
 
-		if( !isdigit( *psz ))
+		if( !isdigit((byte)*psz ))
 			break;
 
 		memset( sznum, 0, sizeof( sznum ));
-		for( i = 0; i < sizeof( sznum ) - 1 && isdigit( *psz ); i++, psz++ )
+		for( i = 0; i < sizeof( sznum ) - 1 && isdigit((byte)*psz ); i++, psz++ )
 			sznum[i] = *psz;
 
 		i = Q_atoi( sznum );

engine/client/soundlib/snd_ogg_vorbis.c

@@ -157,7 +157,7 @@ qboolean Sound_LoadOggVorbis( const char *name, const byte *buffer, fs_offset_t
 	SetBits( sound.flags, SOUND_RESAMPLE );
 	Sound_ScanVorbisComments( &vorbisFile );
 
-	while(( ret = ov_read( &vorbisFile, (char *)sound.wav + written, sound.size - written, 0, sound.width, 1, &section )) != 0 )
+	while(( ret = ov_read( &vorbisFile, (char *)sound.wav + written, sound.size - written, XASH_BIG_ENDIAN, sound.width, 1, &section )) != 0 )
 	{
 		if( ret < 0 )
 		{
@@ -232,7 +232,7 @@ int Stream_ReadOggVorbis( stream_t *stream, int needBytes, void *buffer )
 
 		if( !stream->buffsize )
 		{
-			stream->pos = ov_read( &ctx->vf, (char *)stream->temp, OUTBUF_SIZE, 0, stream->width, 1, &section );
+			stream->pos = ov_read( &ctx->vf, (char *)stream->temp, OUTBUF_SIZE, XASH_BIG_ENDIAN, stream->width, 1, &section );
 			if( stream->pos == 0 )
 			{
 				break; // end of file

engine/client/soundlib/snd_wav.c

@@ -152,6 +152,8 @@ static qboolean StreamFindNextChunk( file_t *file, const char *name, int *last_c
 		if( FS_Read( file, &iff_chunk_len, sizeof( iff_chunk_len )) != sizeof( iff_chunk_len ))
 			return false;
 
+		iff_chunk_len = LittleLong( iff_chunk_len );
+
 		if( iff_chunk_len < 0 )
 			return false;	// didn't find the chunk
 
@@ -317,6 +319,15 @@ qboolean Sound_LoadWAV( const char *name, const byte *buffer, fs_offset_t filesi
 
 	memcpy( sound.wav, buffer + (iff_dataPtr - buffer), sound.size );
 
+	// swap 16-bit samples from little endian to native
+	if( sound.width == 2 )
+	{
+		short *p = (short *)sound.wav;
+		int count = sound.size / 2;
+		for( int i = 0; i < count; i++ )
+			p[i] = LittleShort( p[i] );
+	}
+
 	// now convert 8-bit sounds to signed
 	if( sound.width == 1 )
 	{
@@ -394,6 +405,7 @@ stream_t *Stream_OpenWAV( const char *filename )
 	FS_Read( file, chunkName, 4 );
 
 	FS_Read( file, &t, sizeof( t ));
+	t = LittleShort( t );
 	if( t != 1 )
 	{
 		Con_DPrintf( S_ERROR "%s: %s not a microsoft PCM format\n", __func__, filename );
@@ -402,14 +414,15 @@ stream_t *Stream_OpenWAV( const char *filename )
 	}
 
 	FS_Read( file, &t, sizeof( t ));
-	sound.channels = t;
+	sound.channels = LittleShort( t );
 
 	FS_Read( file, &sound.rate, sizeof( int ));
+	sound.rate = LittleLong( sound.rate );
 
 	FS_Seek( file, 6, SEEK_CUR );
 
 	FS_Read( file, &t, sizeof( t ));
-	sound.width = t / 8;
+	sound.width = LittleShort( t ) / 8;
 
 	sound.loopstart = 0;
 
@@ -423,7 +436,7 @@ stream_t *Stream_OpenWAV( const char *filename )
 	}
 
 	FS_Read( file, &sound.samples, sizeof( int ));
-	sound.samples = ( sound.samples / sound.width ) / sound.channels;
+	sound.samples = ( LittleLong( sound.samples ) / sound.width ) / sound.channels;
 
 	// at this point we have valid stream
 	stream = Mem_Calloc( host.soundpool, sizeof( stream_t ));
@@ -458,6 +471,14 @@ int Stream_ReadWAV( stream_t *stream, int bytes, void *buffer )
 	stream->pos += bytes;
 	FS_Read( stream->file, buffer, bytes );
 
+	if( stream->width == 2 )
+	{
+		short *p = (short *)buffer;
+		int count = bytes / 2;
+		for( int i = 0; i < count; i++ )
+			p[i] = LittleShort( p[i] );
+	}
+
 	return bytes;
 }
 

engine/common/cmd.c

@@ -615,8 +615,11 @@ void Cmd_TokenizeString( const char *text )
 		if( !*text )
 			return;
 
-		if( cmd_argc == 1 )
-			 cmd_args = text;
+		switch( cmd_argc )
+		{
+		case 0: cmd_args = "";   break;
+		case 1: cmd_args = text; break;
+		}
 
 		text = COM_ParseFileSafe( (char*)text, cmd_token, sizeof( cmd_token ), PFILE_IGNOREBRACKET, NULL, NULL );
 

engine/common/com_strings.h

@@ -58,8 +58,8 @@ GNU General Public License for more details.
 // path to saved games
 #define DEFAULT_SAVE_DIRECTORY	"save/"
 
-// path to download games
-#define DEFAULT_DOWNLOADED_DIRECTORY "downloaded/"
+// goldsrc compatible suffix for downloads directory
+#define DEFAULT_DOWNLOADED_DIRECTORY_SUFFIX "_downloads"
 
 // path to user mod directory
 #define DEFAULT_CUSTOM_DIRECTORY "custom/"

engine/common/common.c

@@ -227,7 +227,7 @@ qboolean LZSS_IsCompressed( const byte *source, size_t input_len )
 
 	phdr = (const lzss_header_t *)source;
 
-	if( phdr && phdr->id == LZSS_ID )
+	if( phdr && phdr->id == LittleLong( LZSS_ID ))
 		return true;
 	return false;
 }
@@ -241,8 +241,8 @@ uint LZSS_GetActualSize( const byte *source, size_t input_len )
 
 	phdr = (const lzss_header_t *)source;
 
-	if( phdr && phdr->id == LZSS_ID )
-		return phdr->size;
+	if( phdr && phdr->id == LittleLong( LZSS_ID ))
+		return LittleLong( phdr->size );
 
 	return 0;
 }
@@ -296,8 +296,8 @@ static byte *LZSS_CompressNoAlloc( lzss_state_t *state, byte *pInput, int input_
 		return NULL;
 
 	// set LZSS header
-	header->id = LZSS_ID;
-	header->size = input_length;
+	header->id = LittleLong( LZSS_ID );
+	header->size = LittleLong( input_length );
 
 	// create the compression work buffers, small enough (~64K) for stack
 	state->hash_table = (lzss_list_t *)alloca( 256 * sizeof( lzss_list_t ));
@@ -967,8 +967,8 @@ static void Test_LZSS( void )
 	ASAN_POISON_MEMORY_REGION( poison3, sizeof( poison3 ));
 #endif
 
-	hdr->size = sizeof( in ) - sizeof( *hdr );
-	hdr->id = LZSS_ID;
+	hdr->size = LittleLong( sizeof( in ) - sizeof( *hdr ));
+	hdr->id = LittleLong( LZSS_ID );
 
 	memset( in + sizeof( *hdr ), 0xff, sizeof( in ) - sizeof( *hdr ));
 	result = LZSS_Decompress( in, out, sizeof( in ), sizeof( out ));
@@ -978,18 +978,18 @@ static void Test_LZSS( void )
 	result = LZSS_Decompress( in, out, sizeof( in ), sizeof( out ));
 	TASSERT_EQi( result, 0 );
 
-	hdr->size = 1;
-	hdr->id = LZSS_ID;
+	hdr->size = LittleLong( 1 );
+	hdr->id = LittleLong( LZSS_ID );
 	result = LZSS_Decompress( in, out, sizeof( in ), sizeof( out ));
 	TASSERT_EQi( result, 0 );
 
-	hdr->size = 999;
-	hdr->id = LZSS_ID;
+	hdr->size = LittleLong( 999 );
+	hdr->id = LittleLong( LZSS_ID );
 	result = LZSS_Decompress( in, out, sizeof( in ), sizeof( out ));
 	TASSERT_EQi( result, 0 );
 
-	hdr->size = sizeof( in ) - sizeof( *hdr );
-	hdr->id = 0xa1ba;
+	hdr->size = LittleLong( sizeof( in ) - sizeof( *hdr ));
+	hdr->id = LittleLong( 0xa1ba );
 	result = LZSS_Decompress( in, out, sizeof( in ), sizeof( out ));
 	TASSERT_EQi( result, 0 );
 

engine/common/common.h

@@ -852,13 +852,15 @@ static inline connprotocol_t CL_Protocol( void )
 }
 #endif
 
-static inline qboolean Host_IsLocalGame( void )
+// true in singleplayer only but not specific to local game
+static inline qboolean Host_IsSinglePlayerGame( void )
 {
 	if( SV_Active( ))
 		return SV_GetMaxClients() == 1 ? true : false;
 	return CL_GetMaxClients() == 1 ? true : false;
 }
 
+// true when both server and client running on the same host
 static inline qboolean Host_IsLocalClient( void )
 {
 	return CL_Initialized( ) && SV_Initialized( ) ? true : false;

engine/common/host.c

@@ -513,7 +513,7 @@ static double Host_CalcFPS( void )
 	{
 		fps = CL_GetDemoFramerate();
 	}
-	else if( Host_IsLocalGame( ))
+	else if( Host_IsSinglePlayerGame( ))
 	{
 		if( !gl_vsync.value )
 			fps = host_maxfps.value;
@@ -642,9 +642,10 @@ static qboolean Host_FilterTime( double time )
 	oldtime = host.realtime;
 
 	// NOTE: allow only in singleplayer while demos are not active
-	if( host_framerate.value > 0.0f && Host_IsLocalGame() && !CL_IsPlaybackDemo() && !CL_IsRecordDemo( ))
+	if( host_framerate.value > 0.0f && Host_IsSinglePlayerGame() && !CL_IsPlaybackDemo() && !CL_IsRecordDemo( ))
 		host.frametime = bound( MIN_FRAMETIME, host_framerate.value * scale, MAX_FRAMETIME );
-	else host.frametime = bound( MIN_FRAMETIME, host.frametime, MAX_FRAMETIME );
+	else
+		host.frametime = bound( MIN_FRAMETIME, host.frametime, MAX_FRAMETIME );
 
 	return true;
 }
@@ -833,7 +834,7 @@ static uint32_t Host_CheckBugcomp( void )
 	if( !Sys_CheckParm( "-bugcomp" ))
 		return 0;
 
-	if( Sys_GetParmFromCmdLine( "-bugcomp", args ) && isalpha( args[0] ))
+	if( Sys_GetParmFromCmdLine( "-bugcomp", args ) && isalpha((byte)args[0] ))
 	{
 		Q_splitstr( args, '+', &flags, Host_CheckBugcomp_splitstr_handler );
 	}
@@ -909,9 +910,7 @@ static qboolean Host_CollectX86Libraries( ECommonLibraryType lib_type,
 
 static void Host_CheckGameLibraries( void )
 {
-// on Android, game libraries are loaded from APKs and are invisible to FS_FileExists,
-// so the check cannot work there; iOS is handled via Platform_LibraryExists -> IOS_LibraryExists
-#if !defined( XASH_INTERNAL_GAMELIBS ) && !XASH_ANDROID
+#if !defined( XASH_INTERNAL_GAMELIBS )
 	struct
 	{
 		const char *name;
@@ -935,6 +934,11 @@ static void Host_CheckGameLibraries( void )
 		if( !COM_StringEmpty( libs[i].override ))
 			continue;
 
+#if XASH_ANDROID
+		if( libs[i].type == LIBRARY_CLIENT )
+			continue;
+#endif
+
 		if( libs[i].type == LIBRARY_SERVER )
 		{
 			// missing server library is only critical when singleplayer is available

engine/common/http/net_http_xash.c

@@ -101,6 +101,13 @@ static int HTTP_FileResolveNS( httpfile_t *file );
 static int HTTP_FileSendRequest( httpfile_t *file );
 static int HTTP_FileDecompress( httpfile_t *file );
 
+static const char *HTTP_DownloadPath( char *buf, size_t buflen, const char *path, qboolean incomplete )
+{
+	Q_snprintf( buf, buflen, "../%s" DEFAULT_DOWNLOADED_DIRECTORY_SUFFIX "/%s%s",
+		GI->gamefolder, path, incomplete ? ".incomplete" : "" );
+	return buf;
+}
+
 /*
 ==============
 HTTP_FreeFile
@@ -110,7 +117,7 @@ Skip to next server/file
 */
 static void HTTP_FreeFile( httpfile_t *file, qboolean error )
 {
-	char incname[MAX_SYSPATH + 64]; // plus downloaded/ plus .incomplete
+	char incname[MAX_SYSPATH + 64]; // plus ../{gamedir}_downloads/ plus .incomplete
 	qboolean was_open = false;
 
 	file->blocktime = 0;
@@ -132,7 +139,7 @@ static void HTTP_FreeFile( httpfile_t *file, qboolean error )
 
 	file->socket = -1;
 
-	Q_snprintf( incname, sizeof( incname ), DEFAULT_DOWNLOADED_DIRECTORY "%s.incomplete", file->path );
+	HTTP_DownloadPath( incname, sizeof( incname ), file->path, true );
 
 	if( error )
 	{
@@ -149,7 +156,9 @@ static void HTTP_FreeFile( httpfile_t *file, qboolean error )
 		if( http_autoremove.value == 1 ) // remove broken file
 		{
 			Con_Printf( S_ERROR "no servers to download %s\n", file->path );
+			FS_AllowDirectPaths( true );
 			FS_Delete( incname );
+			FS_AllowDirectPaths( false );
 		}
 		else // autoremove disabled, keep file
 		{
@@ -161,14 +170,18 @@ static void HTTP_FreeFile( httpfile_t *file, qboolean error )
 	{
 		if( file->compressed )
 		{
+			FS_AllowDirectPaths( true );
 			FS_Delete( incname );
+			FS_AllowDirectPaths( false );
 		}
 		else
 		{
 			// Success, rename and process file
 			char name[MAX_SYSPATH];
-			Q_snprintf( name, sizeof( name ), DEFAULT_DOWNLOADED_DIRECTORY "%s", file->path );
+			HTTP_DownloadPath( name, sizeof( name ), file->path, false );
+			FS_AllowDirectPaths( true );
 			FS_Rename( incname, name );
+			FS_AllowDirectPaths( false );
 		}
 	}
 
@@ -195,9 +208,13 @@ static int HTTP_FileQueue( httpfile_t *file )
 	}
 
 	Con_Reportf( "HTTP: Starting download %s from %s:%d\n", file->path, file->server->host, file->server->port );
-	Q_snprintf( name, sizeof( name ), DEFAULT_DOWNLOADED_DIRECTORY "%s.incomplete", file->path );
+	HTTP_DownloadPath( name, sizeof( name ), file->path, true );
 
-	if( !( file->file = FS_Open( name, "wb+", true )))
+	FS_AllowDirectPaths( true );
+	file->file = FS_Open( name, "wb+", true );
+	FS_AllowDirectPaths( false );
+
+	if( !file->file )
 	{
 		Con_Printf( S_ERROR "HTTP: cannot open %s!\n", name );
 		HTTP_FreeFile( file, true );
@@ -249,9 +266,6 @@ static int HTTP_FileResolveNS( httpfile_t *file )
 
 static int HTTP_FileCreateSocket( httpfile_t *file )
 {
-	uint mode = 1;
-	int res;
-
 	file->socket = socket( file->addr.ss_family, SOCK_STREAM, IPPROTO_TCP );
 
 	if( file->socket < 0 )
@@ -261,33 +275,13 @@ static int HTTP_FileCreateSocket( httpfile_t *file )
 		return 0;
 	}
 
-	if( ioctlsocket( file->socket, FIONBIO, (void *)&mode ) < 0 )
+	if( !NET_MakeSocketNonBlocking( file->socket ))
 	{
-		Con_Printf( S_ERROR "%s: ioctl() returned %s\n", __func__, NET_ErrorString());
+		Con_Printf( S_ERROR "%s: failed to make socket non-blocking, error %s\n", __func__, NET_ErrorString());
 		HTTP_FreeFile( file, true );
 		return 0;
 	}
 
-#if XASH_LINUX
-
-	res = fcntl( file->socket, F_GETFL, 0 );
-
-	if( res < 0 )
-	{
-		Con_Printf( S_ERROR "%s: fcntl( F_GETFL ) returned %s\n", __func__, NET_ErrorString());
-		HTTP_FreeFile( file, true );
-		return 0;
-	}
-
-	// SOCK_NONBLOCK is not portable, so use fcntl
-	if( fcntl( file->socket, F_SETFL, res | O_NONBLOCK ) < 0 )
-	{
-		Con_Printf( S_ERROR "%s: fcntl( F_SETFL ) returned %s\n", __func__, NET_ErrorString());
-		HTTP_FreeFile( file, true );
-		return 0;
-	}
-#endif
-
 	http.active_count++;
 	file->pfn_process = HTTP_FileConnect;
 	return 1;
@@ -481,7 +475,7 @@ static int HTTP_FileDecompress( httpfile_t *file )
 	data_in = Mem_Malloc( host.mempool, compressed_len + 1 );
 	data_out = Mem_Malloc( host.mempool, decompressed_len + 1 );
 
-	Q_snprintf( name, sizeof( name ), DEFAULT_DOWNLOADED_DIRECTORY "%s", file->path );
+	HTTP_DownloadPath( name, sizeof( name ), file->path, false );
 
 	memset( &decompress_stream, 0, sizeof( decompress_stream ));
 	decompress_stream.total_in = decompress_stream.avail_in = compressed_len;
@@ -506,7 +500,9 @@ static int HTTP_FileDecompress( httpfile_t *file )
 
 	if( zlib_result == Z_OK || zlib_result == Z_STREAM_END )
 	{
+		FS_AllowDirectPaths( true );
 		g_fsapi.WriteFile( name, data_out, decompressed_len );
+		FS_AllowDirectPaths( false );
 		HTTP_FreeFile( file, false );
 	}
 	else HTTP_FreeFile( file, true );

engine/common/imagelib/img_bmp.c

@@ -16,6 +16,24 @@ GNU General Public License for more details.
 #include "imagelib.h"
 #include "xash3d_mathlib.h"
 #include "img_bmp.h"
+#include "swaplib.h"
+
+le_struct_begin( bmp_swap )
+	le_struct_field( bmp_t, fileSize )
+	le_struct_field( bmp_t, reserved0 )
+	le_struct_field( bmp_t, bitmapDataOffset )
+	le_struct_field( bmp_t, bitmapHeaderSize )
+	le_struct_field( bmp_t, width )
+	le_struct_field( bmp_t, height )
+	le_struct_field( bmp_t, planes )
+	le_struct_field( bmp_t, bitsPerPixel )
+	le_struct_field( bmp_t, compression )
+	le_struct_field( bmp_t, bitmapDataSize )
+	le_struct_field( bmp_t, hRes )
+	le_struct_field( bmp_t, vRes )
+	le_struct_field( bmp_t, colors )
+	le_struct_field( bmp_t, importantColors )
+le_struct_end();
 
 /*
 =============
@@ -41,6 +59,7 @@ qboolean Image_LoadBMP( const char *name, const byte *buffer, fs_offset_t filesi
 
 	buf_p = (byte *)buffer;
 	memcpy( &bhdr, buf_p, sizeof( bmp_t ));
+	le_struct_swap( bmp_swap, &bhdr );
 	buf_p += BI_FILE_HEADER_SIZE + bhdr.bitmapHeaderSize;
 
 	// bogus file header check
@@ -282,7 +301,8 @@ qboolean Image_LoadBMP( const char *name, const byte *buffer, fs_offset_t filesi
 				}
 				break;
 			case 16:
-				shortPixel = *(word *)buf_p, buf_p += 2;
+				shortPixel = buf_p[0] | (buf_p[1] << 8);
+				buf_p += 2;
 				*pixbuf++ = blue = (shortPixel & ( 31 << 10 )) >> 7;
 				*pixbuf++ = green = (shortPixel & ( 31 << 5 )) >> 2;
 				*pixbuf++ = red = (shortPixel & ( 31 )) << 3;
@@ -396,7 +416,9 @@ qboolean Image_SaveBMP( const char *name, rgbdata_t *pix )
 	hdr.colors = ( pixel_size == 1 ) ? 256 : 0;
 	hdr.importantColors = 0;
 
+	le_struct_swap( bmp_swap, &hdr );
 	FS_Write( pfile, &hdr, sizeof( bmp_t ));
+	le_struct_swap( bmp_swap, &hdr );
 
 	pbBmpBits = Mem_Malloc( host.imagepool, cbBmpBits );
 

engine/common/imagelib/img_dds.c

@@ -16,6 +16,49 @@ GNU General Public License for more details.
 #include "imagelib.h"
 #include "xash3d_mathlib.h"
 #include "img_dds.h"
+#include "swaplib.h"
+
+le_struct_begin( dds_pixf_swap )
+	le_struct_field( dds_pixf_t, dwSize )
+	le_struct_field( dds_pixf_t, dwFlags )
+	le_struct_field( dds_pixf_t, dwFourCC )
+	le_struct_field( dds_pixf_t, dwRGBBitCount )
+	le_struct_field( dds_pixf_t, dwRBitMask )
+	le_struct_field( dds_pixf_t, dwGBitMask )
+	le_struct_field( dds_pixf_t, dwBBitMask )
+	le_struct_field( dds_pixf_t, dwABitMask )
+le_struct_end();
+
+le_struct_begin( dds_caps_swap )
+	le_struct_field( dds_caps_t, dwCaps1 )
+	le_struct_field( dds_caps_t, dwCaps2 )
+	le_struct_field( dds_caps_t, dwCaps3 )
+	le_struct_field( dds_caps_t, dwCaps4 )
+le_struct_end();
+
+le_struct_begin( dds_swap )
+	le_struct_field( dds_t, dwIdent )
+	le_struct_field( dds_t, dwSize )
+	le_struct_field( dds_t, dwFlags )
+	le_struct_field( dds_t, dwHeight )
+	le_struct_field( dds_t, dwWidth )
+	le_struct_field( dds_t, dwLinearSize )
+	le_struct_field( dds_t, dwDepth )
+	le_struct_field( dds_t, dwMipMapCount )
+	le_struct_field( dds_t, dwAlphaBitDepth )
+	le_struct_array( dds_t, dwReserved1, 10 )
+	le_struct_child( dds_t, dsPixelFormat, dds_pixf_swap )
+	le_struct_child( dds_t, dsCaps, dds_caps_swap )
+	le_struct_field( dds_t, dwTextureStage )
+le_struct_end();
+
+le_struct_begin( dds_dxt10_swap )
+	le_struct_field( dds_header_dxt10_t, dxgiFormat )
+	le_struct_field( dds_header_dxt10_t, resourceDimension )
+	le_struct_field( dds_header_dxt10_t, miscFlag )
+	le_struct_field( dds_header_dxt10_t, arraySize )
+	le_struct_field( dds_header_dxt10_t, miscFlags2 )
+le_struct_end();
 
 static qboolean Image_CheckDXT3Alpha( dds_t *hdr, byte *fin )
 {
@@ -295,6 +338,7 @@ qboolean Image_LoadDDS( const char *name, const byte *buffer, fs_offset_t filesi
 		return false;
 
 	memcpy( &header, buffer, sizeof( header ));
+	le_struct_swap( dds_swap, &header );
 
 	if( header.dwIdent != DDSHEADER )
 		return false; // it's not a dds file, just skip it
@@ -315,6 +359,7 @@ qboolean Image_LoadDDS( const char *name, const byte *buffer, fs_offset_t filesi
 	if( header.dsPixelFormat.dwFourCC == TYPE_DX10 )
 	{
 		memcpy( &header2, buffer + sizeof( header ), sizeof( header2 ));
+		le_struct_swap( dds_dxt10_swap, &header2 );
 		headersOffset += sizeof( header2 );
 	}
 

engine/common/imagelib/img_ktx2.c

@@ -16,6 +16,34 @@ GNU General Public License for more details.
 #include "imagelib.h"
 #include "xash3d_mathlib.h"
 #include "img_ktx2.h"
+#include "swaplib.h"
+
+le_struct_begin( ktx2_header_swap )
+	le_struct_field( ktx2_header_t, vkFormat )
+	le_struct_field( ktx2_header_t, typeSize )
+	le_struct_field( ktx2_header_t, pixelWidth )
+	le_struct_field( ktx2_header_t, pixelHeight )
+	le_struct_field( ktx2_header_t, pixelDepth )
+	le_struct_field( ktx2_header_t, layerCount )
+	le_struct_field( ktx2_header_t, faceCount )
+	le_struct_field( ktx2_header_t, levelCount )
+	le_struct_field( ktx2_header_t, supercompressionScheme )
+le_struct_end();
+
+le_struct_begin( ktx2_index_swap )
+	le_struct_field( ktx2_index_t, dfdByteOffset )
+	le_struct_field( ktx2_index_t, dfdByteLength )
+	le_struct_field( ktx2_index_t, kvdByteOffset )
+	le_struct_field( ktx2_index_t, kvdByteLength )
+	le_struct_field( ktx2_index_t, sgdByteOffset )
+	le_struct_field( ktx2_index_t, sgdByteLength )
+le_struct_end();
+
+le_struct_begin( ktx2_level_swap )
+	le_struct_field( ktx2_level_t, byteOffset )
+	le_struct_field( ktx2_level_t, byteLength )
+	le_struct_field( ktx2_level_t, uncompressedByteLength )
+le_struct_end();
 
 static void Image_KTX2Format( uint32_t ktx2_format )
 {
@@ -125,6 +153,7 @@ static qboolean Image_KTX2Parse( const ktx2_header_t *header, const byte *buffer
 	}
 
 	memcpy( &index, buffer + KTX2_IDENTIFIER_SIZE + sizeof( ktx2_header_t ), sizeof( index ));
+	le_struct_swap( ktx2_index_swap, &index );
 
 	for( mip = 0; mip < header->levelCount; ++mip )
 	{
@@ -134,6 +163,7 @@ static qboolean Image_KTX2Parse( const ktx2_header_t *header, const byte *buffer
 
 		ktx2_level_t level;
 		memcpy( &level, levels_begin + mip * sizeof( level ), sizeof( level ));
+		le_struct_swap( ktx2_level_swap, &level );
 
 		if( mip_size != level.byteLength )
 		{
@@ -159,6 +189,7 @@ static qboolean Image_KTX2Parse( const ktx2_header_t *header, const byte *buffer
 	{
 		ktx2_level_t level;
 		memcpy( &level, levels_begin + mip * sizeof( level ), sizeof( level ));
+		le_struct_swap( ktx2_level_swap, &level );
 		memcpy( image.rgba + cursor, buffer + level.byteOffset, level.byteLength );
 		cursor += level.byteLength;
 	}
@@ -180,6 +211,7 @@ qboolean Image_LoadKTX2( const char *name, const byte *buffer, fs_offset_t files
 	}
 
 	memcpy( &header, buffer + KTX2_IDENTIFIER_SIZE, sizeof( header ));
+	le_struct_swap( ktx2_header_swap, &header );
 
 	image.width = header.pixelWidth;
 	image.height = header.pixelHeight;

engine/common/imagelib/img_tga.c

@@ -16,6 +16,16 @@ GNU General Public License for more details.
 #include "imagelib.h"
 #include "xash3d_mathlib.h"
 #include "img_tga.h"
+#include "swaplib.h"
+
+le_struct_begin( tga_swap )
+	le_struct_field( tga_t, colormap_index )
+	le_struct_field( tga_t, colormap_length )
+	le_struct_field( tga_t, x_origin )
+	le_struct_field( tga_t, y_origin )
+	le_struct_field( tga_t, width )
+	le_struct_field( tga_t, height )
+le_struct_end();
 
 /*
 =============
@@ -44,10 +54,10 @@ qboolean Image_LoadTGA( const char *name, const byte *buffer, fs_offset_t filesi
 	targa_header.colormap_index = buf_p[0] + buf_p[1] * 256;		buf_p += 2;
 	targa_header.colormap_length = buf_p[0] + buf_p[1] * 256;		buf_p += 2;
 	targa_header.colormap_size = *buf_p;				buf_p += 1;
-	targa_header.x_origin = *(short *)buf_p;			buf_p += 2;
-	targa_header.y_origin = *(short *)buf_p;			buf_p += 2;
-	targa_header.width = image.width = *(short *)buf_p;		buf_p += 2;
-	targa_header.height = image.height = *(short *)buf_p;		buf_p += 2;
+	targa_header.x_origin = buf_p[0] + buf_p[1] * 256;		buf_p += 2;
+	targa_header.y_origin = buf_p[0] + buf_p[1] * 256;		buf_p += 2;
+	targa_header.width = image.width = buf_p[0] + buf_p[1] * 256;	buf_p += 2;
+	targa_header.height = image.height = buf_p[0] + buf_p[1] * 256;	buf_p += 2;
 	targa_header.pixel_size = *buf_p++;
 	targa_header.attributes = *buf_p++;
 	if( targa_header.id_length != 0 ) buf_p += targa_header.id_length;	// skip TARGA image comment
@@ -284,6 +294,7 @@ qboolean Image_SaveTGA( const char *name, rgbdata_t *pix )
 
 	out = buffer;
 
+	le_struct_swap( tga_swap, &targa_header );
 	memcpy( out, &targa_header, sizeof( tga_t ) );
 	out += sizeof( tga_t );
 

engine/common/imagelib/img_utils.c

@@ -285,66 +285,34 @@ int Image_ComparePalette( const byte *pal )
 
 static void Image_SetPalette( const byte *pal, uint *d_table )
 {
-	byte	rgba[4];
-	uint uirgba; // TODO: palette looks byte-swapped on big-endian
-	int	i;
-
-	// setup palette
 	switch( image.d_rendermode )
 	{
 	case LUMP_NORMAL:
-		for( i = 0; i < 256; i++ )
-		{
-			memcpy( rgba, &pal[i * 3], 3 );
-			rgba[3] = 0xFF;
-			memcpy( &uirgba, rgba, sizeof( uirgba ));
-			d_table[i] = uirgba;
-		}
+		for( int i = 0; i < 256; i++ )
+			d_table[i] = HostFourCC( pal[i * 3 + 0], pal[i * 3 + 1], pal[i * 3 + 2], 0xFF );
 		break;
 	case LUMP_TEXGAMMA:
-		for( i = 0; i < 256; i++ )
+		for( int i = 0; i < 256; i++ )
 		{
-			rgba[0] = TextureToGamma( pal[i * 3 + 0] );
-			rgba[1] = TextureToGamma( pal[i * 3 + 1] );
-			rgba[2] = TextureToGamma( pal[i * 3 + 2] );
-			rgba[3] = 0xFF;
-			memcpy( &uirgba, rgba, sizeof( uirgba ));
-			d_table[i] = uirgba;
+			d_table[i] = HostFourCC(
+				TextureToGamma( pal[i * 3 + 0] ),
+				TextureToGamma( pal[i * 3 + 1] ),
+				TextureToGamma( pal[i * 3 + 2] ),
+				0xFF );
 		}
 		break;
 	case LUMP_GRADIENT:
-		for( i = 0; i < 256; i++ )
-		{
-			rgba[0] = pal[765];
-			rgba[1] = pal[766];
-			rgba[2] = pal[767];
-			rgba[3] = i;
-			memcpy( &uirgba, rgba, sizeof( uirgba ));
-			d_table[i] = uirgba;
-		}
+		for( int i = 0; i < 256; i++ )
+			d_table[i] = HostFourCC( pal[765], pal[766], pal[767], i );
 		break;
 	case LUMP_MASKED:
-		for( i = 0; i < 255; i++ )
-		{
-			rgba[0] = pal[i*3+0];
-			rgba[1] = pal[i*3+1];
-			rgba[2] = pal[i*3+2];
-			rgba[3] = 0xFF;
-			memcpy( &uirgba, rgba, sizeof( uirgba ));
-			d_table[i] = uirgba;
-		}
+		for( int i = 0; i < 255; i++ )
+			d_table[i] = HostFourCC( pal[i * 3 + 0], pal[i * 3 + 1], pal[i * 3 + 2], 0xFF );
 		d_table[255] = 0;
 		break;
 	case LUMP_EXTENDED:
-		for( i = 0; i < 256; i++ )
-		{
-			rgba[0] = pal[i*4+0];
-			rgba[1] = pal[i*4+1];
-			rgba[2] = pal[i*4+2];
-			rgba[3] = pal[i*4+3];
-			memcpy( &uirgba, rgba, sizeof( uirgba ));
-			d_table[i] = uirgba;
-		}
+		for( int i = 0; i < 256; i++ )
+			d_table[i] = HostFourCC( pal[i * 4 + 0], pal[i * 4 + 1], pal[i * 4 + 2], pal[i * 4 + 3] );
 		break;
 	}
 }

engine/common/imagelib/img_wad.c

@@ -19,6 +19,43 @@ GNU General Public License for more details.
 #include "studio.h"
 #include "sprite.h"
 #include "qfont.h"
+#include "swaplib.h"
+
+le_struct_begin( charinfo_swap )
+	le_struct_field( charinfo, startoffset )
+	le_struct_field( charinfo, charwidth )
+le_struct_end();
+
+le_struct_begin( qfont_swap )
+	le_struct_field( qfont_t, width )
+	le_struct_field( qfont_t, height )
+	le_struct_field( qfont_t, rowcount )
+	le_struct_field( qfont_t, rowheight )
+	le_struct_array_child( qfont_t, fontinfo, charinfo_swap, NUM_GLYPHS )
+le_struct_end();
+
+le_struct_begin( lmp_swap )
+	le_struct_field( lmp_t, width )
+	le_struct_field( lmp_t, height )
+le_struct_end();
+
+le_struct_begin( mip_swap )
+	le_struct_field( mip_t, width )
+	le_struct_field( mip_t, height )
+	le_struct_array( mip_t, offsets, 4 )
+le_struct_end();
+
+le_struct_begin( dwadinfo_swap )
+	le_struct_field( dwadinfo_t, ident )
+	le_struct_field( dwadinfo_t, numlumps )
+	le_struct_field( dwadinfo_t, infotableofs )
+le_struct_end();
+
+le_struct_begin( dlumpinfo_swap )
+	le_struct_field( dlumpinfo_t, filepos )
+	le_struct_field( dlumpinfo_t, disksize )
+	le_struct_field( dlumpinfo_t, size )
+le_struct_end();
 
 /*
 ============
@@ -98,6 +135,7 @@ qboolean Image_LoadFNT( const char *name, const byte *buffer, fs_offset_t filesi
 		return false;
 
 	memcpy( &font, buffer, sizeof( font ));
+	le_struct_swap( qfont_swap, &font );
 
 	// last sixty four bytes - what the hell ????
 	size = sizeof( qfont_t ) - 4 + ( font.height * font.width * QCHAR_WIDTH ) + sizeof( short ) + 768 + 64;
@@ -120,7 +158,8 @@ qboolean Image_LoadFNT( const char *name, const byte *buffer, fs_offset_t filesi
 
 	fin = buffer + sizeof( font ) - 4;
 	pal = fin + (image.width * image.height);
-	numcolors = *(short *)pal, pal += sizeof( short );
+	numcolors = pal[0] | (pal[1] << 8);
+	pal += sizeof( short );
 
 	if( numcolors == 768 || numcolors == 256 )
 	{
@@ -305,6 +344,7 @@ qboolean Image_LoadLMP( const char *name, const byte *buffer, fs_offset_t filesi
 	{
 		fin = (byte *)buffer;
 		memcpy( &lmp, fin, sizeof( lmp ));
+		le_struct_swap( lmp_swap, &lmp );
 		image.width = lmp.width;
 		image.height = lmp.height;
 		rendermode = LUMP_NORMAL;
@@ -337,7 +377,7 @@ qboolean Image_LoadLMP( const char *name, const byte *buffer, fs_offset_t filesi
 			}
 		}
 		pal = fin + pixels;
-		numcolors = *(short *)pal;
+		numcolors = pal[0] | (pal[1] << 8);
 		if( numcolors != 256 ) pal = NULL; // corrupted lump ?
 		else pal += sizeof( short );
 	}
@@ -397,6 +437,8 @@ qboolean Image_LoadMIP( const char *name, const byte *buffer, fs_offset_t filesi
 		return false;
 
 	memcpy( &mip, buffer, sizeof( mip ));
+	if( !Image_CheckFlag( IL_HOST_ENDIAN ))
+		le_struct_swap( mip_swap, &mip );
 	image.width = mip.width;
 	image.height = mip.height;
 
@@ -411,7 +453,7 @@ qboolean Image_LoadMIP( const char *name, const byte *buffer, fs_offset_t filesi
 		// half-life 1.0.0.1 mip version with palette
 		fin = (byte *)buffer + mip.offsets[0];
 		pal = (byte *)buffer + mip.offsets[0] + (((image.width * image.height) * 85)>>6);
-		numcolors = *(short *)pal;
+		numcolors = pal[0] | (pal[1] << 8);
 		if( numcolors != 256 ) pal = NULL; // corrupted mip ?
 		else pal += sizeof( short ); // skip colorsize
 
@@ -472,7 +514,7 @@ qboolean Image_LoadMIP( const char *name, const byte *buffer, fs_offset_t filesi
 				// three checks here: check if we can load luma, check the texture name and, finally,
 				// validate that palette isn't NULL
 				if( Image_CheckFlag( IL_ALLOW_WAD3_LUMA )
-					&& ( mip.name[0] == '~' || ( mip.name[0] == '+' && isdigit( mip.name[1] ) && mip.name[2] == '~' ))
+					&& ( mip.name[0] == '~' || ( mip.name[0] == '+' && isdigit((byte)mip.name[1] ) && mip.name[2] == '~' ))
 					&& pal != NULL )
 				{
 					SetBits( image.flags, IMAGE_HAS_LUMA );
@@ -596,24 +638,23 @@ Image_LoadWAD
 */
 qboolean Image_LoadWAD( const char *name, const byte *buffer, fs_offset_t filesize )
 {
-	const dwadinfo_t    *header;
-	const dlumpinfo_t   *lumps;
+	dwadinfo_t whdr;
 	const unsigned char *mipdata;
 	int i, j;
 
 	if( !buffer || filesize < sizeof( dwadinfo_t ))
 		return false;
 
-	header = (const dwadinfo_t *)buffer;
-	if( header->numlumps <= 0 || header->infotableofs <= 0 || header->infotableofs >= (int)filesize )
+	memcpy( &whdr, buffer, sizeof( whdr ));
+	le_struct_swap( dwadinfo_swap, &whdr );
+	if( whdr.numlumps <= 0 || whdr.infotableofs <= 0 || whdr.infotableofs >= (int)filesize )
 		return false;
 
-	lumps = (const dlumpinfo_t *)((const unsigned char *)buffer + header->infotableofs );
-
-	for( i = 0; i < header->numlumps; ++i )
+	for( i = 0; i < whdr.numlumps; ++i )
 	{
 		const unsigned char *pixels, *palette, *use_palette;
 		unsigned char grad_palette[256 * 3];
+		dlumpinfo_t lump;
 		int mip_size;
 		mip_t mip;
 		uint32_t      width, height, offset0;
@@ -623,16 +664,20 @@ qboolean Image_LoadWAD( const char *name, const byte *buffer, fs_offset_t filesi
 		float t;
 		byte  idx;
 
-		if( lumps[i].type != TYP_MIPTEX && lumps[i].type != TYP_PALETTE )
+		memcpy( &lump, buffer + whdr.infotableofs + i * sizeof( dlumpinfo_t ), sizeof( lump ));
+		le_struct_swap( dlumpinfo_swap, &lump );
+
+		if( lump.type != TYP_MIPTEX && lump.type != TYP_PALETTE )
 			continue;
 
 		// get lump data and validate
-		mipdata = (const unsigned char *)buffer + lumps[i].filepos;
-		mip_size = lumps[i].disksize;
-		if( lumps[i].filepos < 0 || lumps[i].filepos + mip_size > (int)filesize )
+		mipdata = (const unsigned char *)buffer + lump.filepos;
+		mip_size = lump.disksize;
+		if( lump.filepos < 0 || lump.filepos + mip_size > (int)filesize )
 			continue;
 
 		memcpy( &mip, mipdata, sizeof( mip ));
+		le_struct_swap( mip_swap, &mip );
 		width = mip.width;
 		height = mip.height;
 
@@ -652,7 +697,7 @@ qboolean Image_LoadWAD( const char *name, const byte *buffer, fs_offset_t filesi
 		use_palette = palette;
 
 		// handle gradient palette
-		if( lumps[i].type == TYP_PALETTE )
+		if( lump.type == TYP_PALETTE )
 		{
 			// gradient palette
 			const unsigned char *frontColorPtr = palette + 255 * 3;
@@ -755,12 +800,16 @@ qboolean Image_SaveWAD( const char *name, rgbdata_t *pix )
 	header.ident = IDWAD3HEADER;
 	header.numlumps = 1;
 
+	le_struct_swap( dwadinfo_swap, &header );
 	FS_Write( f, &header, sizeof( header ));
+	le_struct_swap( mip_swap, &miptex );
 	FS_Write( f, &miptex, sizeof( mip_t ));
+	le_struct_swap( mip_swap, &miptex );
 	FS_Write( f, pix->buffer, m0size );
 	FS_Write( f, mip1_data, m1size );
 	FS_Write( f, mip2_data, m2size );
 	FS_Write( f, mip3_data, m3size );
+	palette_size = LittleShort( palette_size );
 	FS_Write( f, &palette_size, sizeof( short ));
 
 	if( lump_type == TYP_PALETTE )
@@ -793,10 +842,11 @@ qboolean Image_SaveWAD( const char *name, rgbdata_t *pix )
 	lump.type = (char)lump_type;
 	lump.attribs = 0;
 	Q_strncpy( lump.name, "tempdecal", sizeof( lump.name ));
+	le_struct_swap( dlumpinfo_swap, &lump );
 	FS_Write( f, &lump, sizeof( lump ));
 
 	FS_Seek( f, offsetof( dwadinfo_t, infotableofs ), SEEK_SET );
-	infotableofs32 = (int)infotableofs;
+	infotableofs32 = LittleLong((int)infotableofs );
 	FS_Write( f, &infotableofs32, sizeof( int ));
 
 	FS_Close( f );

engine/common/lib_common.c

@@ -327,7 +327,7 @@ static char *COM_GetItaniumName( const char * const in_name )
 	{
 		// parse symbol length marker
 		len = 0;
-		for( ; isdigit( *f ) && remaining > 0; f++, remaining-- )
+		for( ; isdigit((byte)*f ) && remaining > 0; f++, remaining-- )
 			len = len * 10 + ( *f - '0' );
 
 		// sane value
@@ -344,7 +344,7 @@ static char *COM_GetItaniumName( const char * const in_name )
 		if( *f == 'E' )
 			break;
 
-		if( !isdigit( *f ) || remaining <= 0 )
+		if( !isdigit((byte)*f ) || remaining <= 0 )
 			goto invalid_format;
 	}
 

engine/common/mod_bmodel.c

@@ -23,6 +23,7 @@ GNU General Public License for more details.
 #include "enginefeatures.h"
 #include "client.h"
 #include "server.h"			// LUMP_ error codes
+#include "swaplib.h"
 #include "ref_common.h"
 #if defined( HAVE_OPENMP )
 #include <omp.h>
@@ -165,35 +166,188 @@ typedef enum
 	LOADLUMP_BSPX,     // ... from BSPX data
 } loadlump_source_t;
 
-#define LUMP_SAVESTATS  BIT( 0 )
-#define LUMP_TESTONLY   BIT( 1 )
-#define LUMP_SILENT     BIT( 2 )
-#define LUMP_BSP30EXT   BIT( 3 ) // extra marker for Mod_LoadLump
-#define LUMP_BSPX       BIT( 4 )
+#define LUMP_SAVESTATS   BIT( 0 )
+#define LUMP_BSHIFT_SWAP BIT( 1 )
+#define LUMP_SILENT      BIT( 2 )
+#define LUMP_BSP30EXT    BIT( 3 ) // extra marker for Mod_LoadLump
+#define LUMP_BSPX        BIT( 4 )
 
 typedef struct
 {
-	int          lumpnumber;
+	const int    lumpnumber;
 
 	// BSPX
 	const char   lumpname[24];
 
-	int          flags;
+	const int    flags;
 	const size_t mincount;
 	const size_t maxcount;
 	const int    entrysize;
 	const int    entrysize32; // extended size (0 if not available)
 	const char   *loadname;
-	const void   **dataptr;
-	size_t       *count;
+	const size_t dataofs;  // offsetof into dbspmodel_t for data pointer
+	const size_t countofs; // offsetof into dbspmodel_t for count/size
+#if XASH_BIG_ENDIAN // do not waste memory on little endian
+	const swap_struct_def_t *swap;
+	const size_t swaplen;
+	const swap_struct_def_t *swap32;
+	const size_t swaplen32;
+#endif
 } mlumpinfo_t;
 
+// all these macros are ugly af
+#if XASH_BIG_ENDIAN
+	#define LUMP_SWAP( x )       .swap = x, .swaplen = ARRAYSIZE( x )
+	#define LUMP_SWAP32( x, y )  .swap = x, .swaplen = ARRAYSIZE( x ), .swap32 = y, .swaplen32 = ARRAYSIZE( y )
+#else
+	#define LUMP_SWAP( x )
+	#define LUMP_SWAP32( x, y )
+#endif
+
+le_struct_begin( dlump_swap )
+	le_struct_field( dlump_t, fileofs )
+	le_struct_field( dlump_t, filelen )
+le_struct_end();
+
+le_struct_begin( dheader_swap )
+	le_struct_field( dheader_t, version )
+	le_struct_array_child( dheader_t, lumps, dlump_swap, HEADER_LUMPS )
+le_struct_end();
+
+le_struct_begin( dextrahdr_swap )
+	le_struct_field( dextrahdr_t, id )
+	le_struct_field( dextrahdr_t, version )
+	le_struct_array_child( dextrahdr_t, lumps, dlump_swap, EXTRA_LUMPS )
+le_struct_end();
+
+le_struct_begin( dbspx_hdr_swap )
+	le_struct_field( dbspx_hdr_t, id )
+	le_struct_field( dbspx_hdr_t, numlumps )
+	// flexible array member omitted
+le_struct_end();
+
+le_struct_begin( dbspx_lump_swap )
+	le_struct_field( dbspx_lump_t, fileofs )
+	le_struct_field( dbspx_lump_t, filelen )
+le_struct_end();
+
+le_struct_begin( dplane_swap )
+	le_struct_array( dplane_t, normal, 3 )
+	le_struct_field( dplane_t, dist )
+	le_struct_field( dplane_t, type )
+le_struct_end();
+
+le_struct_begin( dvertex_swap )
+	le_struct_array( dvertex_t, point, 3 )
+le_struct_end();
+
+le_struct_begin( dnode_swap )
+	le_struct_field( dnode_t, planenum )
+	le_struct_array( dnode_t, children, 2 )
+	le_struct_array( dnode_t, mins, 3 )
+	le_struct_array( dnode_t, maxs, 3 )
+	le_struct_field( dnode_t, firstface )
+	le_struct_field( dnode_t, numfaces )
+le_struct_end();
+
+le_struct_begin( dnode32_swap )
+	le_struct_field( dnode32_t, planenum )
+	le_struct_array( dnode32_t, children, 2 )
+	le_struct_array( dnode32_t, mins, 3 )
+	le_struct_array( dnode32_t, maxs, 3 )
+	le_struct_field( dnode32_t, firstface )
+	le_struct_field( dnode32_t, numfaces )
+le_struct_end();
+
+le_struct_begin( dtexinfo_swap )
+	le_struct_array( dtexinfo_t, vecs[0], 4 )
+	le_struct_array( dtexinfo_t, vecs[1], 4 )
+	le_struct_field( dtexinfo_t, miptex )
+	le_struct_field( dtexinfo_t, flags )
+	le_struct_field( dtexinfo_t, faceinfo )
+le_struct_end();
+
+le_struct_begin( dface_swap )
+	le_struct_field( dface_t, planenum )
+	le_struct_field( dface_t, side )
+	le_struct_field( dface_t, firstedge )
+	le_struct_field( dface_t, numedges )
+	le_struct_field( dface_t, texinfo )
+	le_struct_field( dface_t, lightofs )
+le_struct_end();
+
+le_struct_begin( dface32_swap )
+	le_struct_field( dface32_t, planenum )
+	le_struct_field( dface32_t, side )
+	le_struct_field( dface32_t, firstedge )
+	le_struct_field( dface32_t, numedges )
+	le_struct_field( dface32_t, texinfo )
+	le_struct_field( dface32_t, lightofs )
+le_struct_end();
+
+le_struct_begin( dclipnode_swap )
+	le_struct_field( dclipnode_t, planenum )
+	le_struct_array( dclipnode_t, children, 2 )
+le_struct_end();
+
+le_struct_begin( dclipnode32_swap )
+	le_struct_field( dclipnode32_t, planenum )
+	le_struct_array( dclipnode32_t, children, 2 )
+le_struct_end();
+
+le_struct_begin( dleaf_swap )
+	le_struct_field( dleaf_t, contents )
+	le_struct_field( dleaf_t, visofs )
+	le_struct_array( dleaf_t, mins, 3 )
+	le_struct_array( dleaf_t, maxs, 3 )
+	le_struct_field( dleaf_t, firstmarksurface )
+	le_struct_field( dleaf_t, nummarksurfaces )
+le_struct_end();
+
+le_struct_begin( dleaf32_swap )
+	le_struct_field( dleaf32_t, contents )
+	le_struct_field( dleaf32_t, visofs )
+	le_struct_array( dleaf32_t, mins, 3 )
+	le_struct_array( dleaf32_t, maxs, 3 )
+	le_struct_field( dleaf32_t, firstmarksurface )
+	le_struct_field( dleaf32_t, nummarksurfaces )
+le_struct_end();
+
+le_struct_begin( dedge_swap )
+	le_struct_array( dedge_t, v, 2 )
+le_struct_end();
+
+le_struct_begin( dedge32_swap )
+	le_struct_array( dedge32_t, v, 2 )
+le_struct_end();
+
+le_struct_begin( dmodel_swap )
+	le_struct_array( dmodel_t, mins, 3 )
+	le_struct_array( dmodel_t, maxs, 3 )
+	le_struct_array( dmodel_t, origin, 3 )
+	le_struct_array( dmodel_t, headnode, MAX_MAP_HULLS )
+	le_struct_field( dmodel_t, visleafs )
+	le_struct_field( dmodel_t, firstface )
+	le_struct_field( dmodel_t, numfaces )
+le_struct_end();
+
+le_struct_begin( dfaceinfo_swap )
+	le_struct_field( dfaceinfo_t, texture_step )
+	le_struct_field( dfaceinfo_t, max_extent )
+	le_struct_field( dfaceinfo_t, groupid )
+le_struct_end();
+
+le_struct_begin( mip_swap )
+	le_struct_field( mip_t, width )
+	le_struct_field( mip_t, height )
+	le_struct_array( mip_t, offsets, 4 )
+le_struct_end();
+
 world_static_t     world;
-static dbspmodel_t srcmodel;
 static loadstat_t  loadstat;
 static model_t     *worldmodel;
 static byte        g_visdata[(MAX_MAP_LEAFS+7)/8];	// intermediate buffer
-static mlumpinfo_t srclumps[HEADER_LUMPS] =
+static const mlumpinfo_t srclumps[HEADER_LUMPS] =
 {
 	{
 		.lumpnumber  = LUMP_ENTITIES,
@@ -201,8 +355,8 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.maxcount    = MAX_MAP_ENTSTRING,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "entities",
-		.dataptr     = (const void **)&srcmodel.entdata,
-		.count       = &srcmodel.entdatasize,
+		.dataofs     = offsetof( dbspmodel_t, entdata ),
+		.countofs    = offsetof( dbspmodel_t, entdatasize ),
 	},
 	{
 		.lumpnumber  = LUMP_PLANES,
@@ -210,8 +364,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.maxcount    = MAX_MAP_PLANES,
 		.entrysize   = sizeof( dplane_t ),
 		.loadname    = "planes",
-		.dataptr     = (const void **)&srcmodel.planes,
-		.count       = &srcmodel.numplanes,
+		.dataofs     = offsetof( dbspmodel_t, planes ),
+		.countofs    = offsetof( dbspmodel_t, numplanes ),
+		LUMP_SWAP( dplane_swap )
 	},
 	{
 		.lumpnumber  = LUMP_TEXTURES,
@@ -219,24 +374,25 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.maxcount    = MAX_MAP_MIPTEX,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "textures",
-		.dataptr     = (const void **)&srcmodel.textures,
-		.count       = &srcmodel.texdatasize,
+		.dataofs     = offsetof( dbspmodel_t, textures ),
+		.countofs    = offsetof( dbspmodel_t, texdatasize ),
 	},
 	{
 		.lumpnumber  = LUMP_VERTEXES,
 		.maxcount    = MAX_MAP_VERTS,
 		.entrysize   = sizeof( dvertex_t ),
 		.loadname    = "vertexes",
-		.dataptr     = (const void **)&srcmodel.vertexes,
-		.count       = &srcmodel.numvertexes,
+		.dataofs     = offsetof( dbspmodel_t, vertexes ),
+		.countofs    = offsetof( dbspmodel_t, numvertexes ),
+		LUMP_SWAP( dvertex_swap )
 	},
 	{
 		.lumpnumber  = LUMP_VISIBILITY,
 		.maxcount    = MAX_MAP_VISIBILITY,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "visibility",
-		.dataptr     = (const void **)&srcmodel.visdata,
-		.count       = &srcmodel.visdatasize,
+		.dataofs     = offsetof( dbspmodel_t, visdata ),
+		.countofs    = offsetof( dbspmodel_t, visdatasize ),
 	},
 	{
 		.lumpnumber  = LUMP_NODES,
@@ -246,8 +402,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize32 = sizeof( dnode32_t ),
 		.loadname    = "nodes",
 		.flags       = CHECK_OVERFLOW,
-		.dataptr     = (const void **)&srcmodel.nodes,
-		.count       = &srcmodel.numnodes,
+		.dataofs     = offsetof( dbspmodel_t, nodes ),
+		.countofs    = offsetof( dbspmodel_t, numnodes ),
+		LUMP_SWAP32( dnode_swap, dnode32_swap )
 	},
 	{
 		.lumpnumber  = LUMP_TEXINFO,
@@ -256,8 +413,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize   = sizeof( dtexinfo_t ),
 		.loadname    = "texinfo",
 		.flags       = CHECK_OVERFLOW,
-		.dataptr     = (const void **)&srcmodel.texinfo,
-		.count       = &srcmodel.numtexinfo,
+		.dataofs     = offsetof( dbspmodel_t, texinfo ),
+		.countofs    = offsetof( dbspmodel_t, numtexinfo ),
+		LUMP_SWAP( dtexinfo_swap )
 	},
 	{
 		.lumpnumber  = LUMP_FACES,
@@ -267,8 +425,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize32 = sizeof( dface32_t ),
 		.loadname    = "faces",
 		.flags       = CHECK_OVERFLOW,
-		.dataptr     = (const void **)&srcmodel.surfaces,
-		.count       = &srcmodel.numsurfaces,
+		.dataofs     = offsetof( dbspmodel_t, surfaces ),
+		.countofs    = offsetof( dbspmodel_t, numsurfaces ),
+		LUMP_SWAP32( dface_swap, dface32_swap )
 	},
 	{
 		.lumpnumber  = LUMP_LIGHTING,
@@ -277,8 +436,8 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize   = sizeof( byte ),
 		.loadname    = "lightmaps",
 		.flags       = 0,
-		.dataptr     = (const void **)&srcmodel.lightdata,
-		.count       = &srcmodel.lightdatasize,
+		.dataofs     = offsetof( dbspmodel_t, lightdata ),
+		.countofs    = offsetof( dbspmodel_t, lightdatasize ),
 	},
 	{
 		.lumpnumber  = LUMP_CLIPNODES,
@@ -288,8 +447,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize32 = sizeof( dclipnode32_t ),
 		.loadname    = "clipnodes",
 		.flags       = 0,
-		.dataptr     = (const void **)&srcmodel.clipnodes,
-		.count       = &srcmodel.numclipnodes,
+		.dataofs     = offsetof( dbspmodel_t, clipnodes ),
+		.countofs    = offsetof( dbspmodel_t, numclipnodes ),
+		LUMP_SWAP32( dclipnode_swap, dclipnode32_swap )
 	},
 	{
 		.lumpnumber  = LUMP_LEAFS,
@@ -299,8 +459,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize32 = sizeof( dleaf32_t ),
 		.loadname    = "leafs",
 		.flags       = CHECK_OVERFLOW,
-		.dataptr     = (const void **)&srcmodel.leafs,
-		.count       = &srcmodel.numleafs,
+		.dataofs     = offsetof( dbspmodel_t, leafs ),
+		.countofs    = offsetof( dbspmodel_t, numleafs ),
+		LUMP_SWAP32( dleaf_swap, dleaf32_swap )
 	},
 	{
 		.lumpnumber  = LUMP_MARKSURFACES,
@@ -310,8 +471,8 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize32 = sizeof( dmarkface32_t ),
 		.loadname    = "markfaces",
 		.flags       = 0,
-		.dataptr     = (const void **)&srcmodel.markfaces,
-		.count       = &srcmodel.nummarkfaces,
+		.dataofs     = offsetof( dbspmodel_t, markfaces ),
+		.countofs    = offsetof( dbspmodel_t, nummarkfaces ),
 	},
 	{
 		.lumpnumber  = LUMP_EDGES,
@@ -321,8 +482,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize32 = sizeof( dedge32_t ),
 		.loadname    = "edges",
 		.flags       = 0,
-		.dataptr     = (const void **)&srcmodel.edges,
-		.count       = &srcmodel.numedges,
+		.dataofs     = offsetof( dbspmodel_t, edges ),
+		.countofs    = offsetof( dbspmodel_t, numedges ),
+		LUMP_SWAP32( dedge_swap, dedge32_swap )
 	},
 	{
 		.lumpnumber  = LUMP_SURFEDGES,
@@ -331,8 +493,8 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize   = sizeof( dsurfedge_t ),
 		.loadname    = "surfedges",
 		.flags       = 0,
-		.dataptr     = (const void **)&srcmodel.surfedges,
-		.count       = &srcmodel.numsurfedges,
+		.dataofs     = offsetof( dbspmodel_t, surfedges ),
+		.countofs    = offsetof( dbspmodel_t, numsurfedges ),
 	},
 	{
 		.lumpnumber  = LUMP_MODELS,
@@ -341,8 +503,9 @@ static mlumpinfo_t srclumps[HEADER_LUMPS] =
 		.entrysize   = sizeof( dmodel_t ),
 		.loadname    = "models",
 		.flags       = CHECK_OVERFLOW,
-		.dataptr     = (const void **)&srcmodel.submodels,
-		.count       = &srcmodel.numsubmodels,
+		.dataofs     = offsetof( dbspmodel_t, submodels ),
+		.countofs    = offsetof( dbspmodel_t, numsubmodels ),
+		LUMP_SWAP( dmodel_swap )
 	},
 };
 
@@ -354,8 +517,8 @@ static const mlumpinfo_t extlumps[EXTRA_LUMPS] =
 		.maxcount    = MAX_MAP_LIGHTING,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "deluxmaps",
-		.dataptr     = (const void **)&srcmodel.deluxdata,
-		.count       = &srcmodel.deluxdatasize,
+		.dataofs     = offsetof( dbspmodel_t, deluxdata ),
+		.countofs    = offsetof( dbspmodel_t, deluxdatasize ),
 	},
 	{
 		.lumpnumber  = LUMP_FACEINFO,
@@ -364,8 +527,9 @@ static const mlumpinfo_t extlumps[EXTRA_LUMPS] =
 		.entrysize   = sizeof( dfaceinfo_t ),
 		.loadname    = "faceinfos",
 		.flags       = CHECK_OVERFLOW,
-		.dataptr     = (const void **)&srcmodel.faceinfo,
-		.count       = &srcmodel.numfaceinfo,
+		.dataofs     = offsetof( dbspmodel_t, faceinfo ),
+		.countofs    = offsetof( dbspmodel_t, numfaceinfo ),
+		LUMP_SWAP( dfaceinfo_swap )
 	},
 	{
 		.lumpnumber  = LUMP_SHADOWMAP,
@@ -373,8 +537,8 @@ static const mlumpinfo_t extlumps[EXTRA_LUMPS] =
 		.maxcount    = MAX_MAP_LIGHTING / 3,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "shadowmap",
-		.dataptr     = (const void **)&srcmodel.shadowdata,
-		.count       = &srcmodel.shadowdatasize,
+		.dataofs     = offsetof( dbspmodel_t, shadowdata ),
+		.countofs    = offsetof( dbspmodel_t, shadowdatasize ),
 	},
 };
 
@@ -385,16 +549,16 @@ static const mlumpinfo_t bspxlumps[] =
 		.maxcount    = MAX_MAP_LIGHTING,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "rgblighting",
-		.dataptr     = (const void **)&srcmodel.rgblightdata,
-		.count       = &srcmodel.rgblightdatasize,
+		.dataofs     = offsetof( dbspmodel_t, rgblightdata ),
+		.countofs    = offsetof( dbspmodel_t, rgblightdatasize ),
 	},
 	{
 		.lumpname    = "LIGHTINGDIR",
 		.maxcount    = MAX_MAP_LIGHTING,
 		.entrysize   = sizeof( byte ),
 		.loadname    = "lightingdir",
-		.dataptr     = (const void **)&srcmodel.deluxdata,
-		.count       = &srcmodel.deluxdatasize,
+		.dataofs     = offsetof( dbspmodel_t, deluxdata ),
+		.countofs    = offsetof( dbspmodel_t, deluxdatasize ),
 	},
 };
 
@@ -593,7 +757,7 @@ Mod_LoadLump
 generic loader
 =================
 */
-static void Mod_LoadLump( const void *in, const mlumpinfo_t *info, mlumpstat_t *stat, int flags, loadlump_source_t source, const void *bspx_data )
+static void Mod_LoadLump( const void *in, const mlumpinfo_t *info, mlumpstat_t *stat, int flags, loadlump_source_t source, const void *bspx_data, dbspmodel_t *bmod )
 {
 	int     version = ((const dheader_t *)in)->version, i;
 	size_t  numelems, real_entrysize;
@@ -604,7 +768,16 @@ static void Mod_LoadLump( const void *in, const mlumpinfo_t *info, mlumpstat_t *
 	case LOADLUMP_STANDARD:
 	{
 		const dheader_t *header = in;
-		l = header->lumps[info->lumpnumber];
+		int lumpnumber = info->lumpnumber;
+
+		if( FBitSet( flags, LUMP_BSHIFT_SWAP ))
+		{
+			if( lumpnumber == LUMP_ENTITIES )
+				lumpnumber = LUMP_PLANES;
+			else if( lumpnumber == LUMP_PLANES )
+				lumpnumber = LUMP_ENTITIES;
+		}
+		l = header->lumps[lumpnumber];
 		break;
 	}
 	case LOADLUMP_BSP30EXT:
@@ -671,7 +844,7 @@ static void Mod_LoadLump( const void *in, const mlumpinfo_t *info, mlumpstat_t *
 	}
 
 	// bmodels not required the visibility
-	if( !FBitSet( flags, LUMP_TESTONLY ) && !world.loading && info->lumpnumber == LUMP_VISIBILITY )
+	if( info->lumpnumber == LUMP_VISIBILITY && !world.loading && bmod )
 		SetBits( flags, LUMP_SILENT ); // shut up warning
 
 	// fill the stats for world
@@ -749,15 +922,33 @@ static void Mod_LoadLump( const void *in, const mlumpinfo_t *info, mlumpstat_t *
 		}
 	}
 
-	if( FBitSet( flags, LUMP_TESTONLY ))
-		return; // don't fill the intermediate struct
+	// if no bmod is passed, we are only testing if BSP lumps are not corrupted
+	if( !bmod )
+		return;
+
+	byte *data = (byte *)in + l.fileofs;
 
 	// all checks are passed, store pointers
-	if( info->dataptr )
-		*info->dataptr = (void *)((byte *)in + l.fileofs);
+	*(byte **)((byte *)bmod + info->dataofs) = data;
+	*(size_t *)((byte *)bmod + info->countofs) = numelems;
 
-	if( info->count )
-		*info->count = numelems;
+	// finally, process the data
+#if XASH_BIG_ENDIAN
+	const swap_struct_def_t *swap = real_entrysize == info->entrysize32 ? info->swap32 : info->swap;
+	size_t swaplen = real_entrysize == info->entrysize32 ? info->swaplen32 : info->swaplen;
+
+	if( swap )
+	{
+		for( size_t j = 0; j < numelems; j++ )
+			swap_struct_( swap, swaplen, data + j * real_entrysize );
+	}
+	// some lumps don't need a swapdef, as all needed data in the lump info
+	else if( real_entrysize > 1 )
+	{
+		for( size_t j = 0; j < numelems; j++ )
+			swap_field_( data + j * real_entrysize, real_entrysize );
+	}
+#endif
 }
 
 /*
@@ -2216,6 +2407,9 @@ static void Mod_LoadEntities( model_t *mod, const dbspmodel_t *bmod )
 	world.wadlist = NULL;
 	world.wadcount = 0;
 
+	world.litwater_minlight = -1;
+	world.litwater_scale = -1.0f;
+
 	// parse all the wads for loading textures in right ordering
 	while(( pfile = COM_ParseFile( pfile, token, sizeof( token ))) != NULL )
 	{
@@ -2259,6 +2453,15 @@ static void Mod_LoadEntities( model_t *mod, const dbspmodel_t *bmod )
 				Mem_Free( world.generator );
 				world.generator = copystring( token );
 			}
+			else if( !Q_stricmp( keyname, "_litwater" ))
+			{
+				if( Q_atoi( token ) != 0 )
+					SetBits( world.flags, FWORLD_HAS_LITWATER );
+			}
+			else if( !Q_stricmp( keyname, "_litwater_minlight" ))
+				world.litwater_minlight = Q_atoi( token );
+			else if( !Q_stricmp( keyname, "_litwater_scale" ))
+				world.litwater_scale = Q_atof( token );
 		}
 		return;	// all done
 	}
@@ -2535,6 +2738,7 @@ static void Mod_InitSkyClouds( model_t *mod, const mip_t *mt, texture_t *tx, qbo
 		if( custom_palette )
 			size += sizeof( short ) + 768;
 
+		Image_SetForceFlags( IL_HOST_ENDIAN );
 		r_sky = FS_LoadImage( texname, (byte *)mt, size );
 	}
 	else
@@ -2717,7 +2921,7 @@ static void Mod_LoadTextureData( model_t *mod, dbspmodel_t *bmod, int textureInd
 		const size_t size = Mod_CalculateMipTexSize( mipTex, usesCustomPalette );
 
 		Q_snprintf( texName, sizeof( texName ), "#%s:%s.mip", loadstat.name, mipTex->name );
-		Image_SetForceFlags( texture_force_flags );
+		Image_SetForceFlags( texture_force_flags | IL_HOST_ENDIAN );
 		texture->gl_texturenum = ref.dllFuncs.GL_LoadTexture( texName, (byte *)mipTex, size, txFlags );
 	}
 
@@ -2750,7 +2954,7 @@ static void Mod_LoadTextureData( model_t *mod, dbspmodel_t *bmod, int textureInd
 
 		Q_snprintf( texName, sizeof( texName ), "#%s:%s_luma.mip", loadstat.name, mipTex->name );
 
-		Image_SetForceFlags( texture_force_flags );
+		Image_SetForceFlags( texture_force_flags | IL_HOST_ENDIAN );
 
 		if( mipTex->offsets[0] > 0 )
 		{
@@ -2975,6 +3179,24 @@ static void Mod_LoadTextures( model_t *mod, dbspmodel_t *bmod )
 
 	lump = bmod->textures;
 
+#if XASH_BIG_ENDIAN
+	if( lump )
+	{
+		lump->nummiptex = LittleLong( lump->nummiptex );
+
+		for( int i = 0; i < lump->nummiptex; i++ )
+		{
+			lump->dataofs[i] = LittleLong( lump->dataofs[i] );
+
+			if( lump->dataofs[i] >= 0 )
+			{
+				mip_t *mt = (mip_t *)((byte *)lump + lump->dataofs[i]);
+				le_struct_swap( mip_swap, mt );
+			}
+		}
+	}
+#endif
+
 	if( bmod->texdatasize < 1 || !lump || lump->nummiptex < 1 )
 	{
 		// no textures
@@ -3845,6 +4067,103 @@ static int Mod_LumpLooksLikeEntities( const char *lump, const size_t lumplen )
 	return Q_memmem( lump, lumplen, "\"classname\"", sizeof( "\"classname\"" ) - 1 ) != NULL ? 1 : 0;
 }
 
+static void Mod_SwapBSPLumps( byte *mod_base, size_t bufferlen )
+{
+	dheader_t *header = (dheader_t *)mod_base;
+
+	le_struct_swap( dheader_swap, header );
+
+	// BSP30ext pass
+	if( header->version == HLBSP_VERSION && bufferlen > sizeof( *header ) + sizeof( dextrahdr_t ))
+	{
+		dextrahdr_t *ext = (dextrahdr_t *)( mod_base + sizeof( *header ));
+
+		if( ext->id == LittleLong( IDEXTRAHEADER ))
+			le_struct_swap( dextrahdr_swap, ext );
+	}
+}
+
+/*
+=================
+CRC32_MapFile
+
+compute CRC for the map lump data
+=================
+*/
+qboolean CRC32_MapFile( dword *crcvalue, const char *filename, qboolean multiplayer )
+{
+	byte headbuf[sizeof( dheader_t )];
+	char buffer[1024];
+	int i, num_bytes, lumplen;
+	dheader_t *header;
+	file_t *f;
+
+	if( !crcvalue )
+		return false;
+
+	// always calc same checksum for singleplayer
+	if( multiplayer == false )
+	{
+		*crcvalue = (('H'<<24)+('S'<<16)+('A'<<8)+'X');
+		return true;
+	}
+
+	f = FS_Open( filename, "rb", false );
+	if( !f )
+		return false;
+
+	num_bytes = FS_Read( f, headbuf, sizeof( headbuf ));
+
+	if( num_bytes != sizeof( headbuf ))
+	{
+		FS_Close( f );
+		return false;
+	}
+
+	header = (dheader_t *)headbuf;
+	le_struct_swap( dheader_swap, header );
+
+	switch( header->version )
+	{
+	case Q1BSP_VERSION:
+	case HLBSP_VERSION:
+	case QBSP2_VERSION:
+		break;
+	default:
+		FS_Close( f );
+		return false;
+	}
+
+	CRC32_Init( crcvalue );
+
+	for( i = LUMP_PLANES; i < HEADER_LUMPS; i++ )
+	{
+		lumplen = header->lumps[i].filelen;
+		FS_Seek( f, header->lumps[i].fileofs, SEEK_SET );
+
+		while( lumplen > 0 )
+		{
+			if( lumplen >= sizeof( buffer ))
+				num_bytes = FS_Read( f, buffer, sizeof( buffer ));
+			else
+				num_bytes = FS_Read( f, buffer, lumplen );
+
+			if( num_bytes > 0 )
+			{
+				lumplen -= num_bytes;
+				CRC32_ProcessBuffer( crcvalue, buffer, num_bytes );
+			}
+
+			if( FS_Eof( f ))
+				break;
+		}
+	}
+
+	FS_Close( f );
+
+	return true;
+}
+
 /*
 =================
 Mod_FindEndOfBSPFile
@@ -3889,20 +4208,26 @@ Mod_FindBSPX
 find BSPX header position, returns -1 on error
 =================
 */
-static fs_offset_t Mod_FindBSPX( const byte *mod_base, size_t bufferlen )
+static fs_offset_t Mod_FindBSPX( byte *mod_base, size_t bufferlen )
 {
 	fs_offset_t max_offset = Mod_FindEndOfBSPFile( mod_base, bufferlen );
-	const dbspx_hdr_t *bspx_header;
 
 	max_offset = ALIGN( max_offset, 4 ); // force 32-bit boundary
 
 	if( max_offset + sizeof( dbspx_hdr_t ) > bufferlen )
 		return -1;
 
-	bspx_header = (const dbspx_hdr_t *)( mod_base + max_offset );
+	dbspx_hdr_t *bspx_header = (dbspx_hdr_t *)( mod_base + max_offset );
+
 	if( bspx_header->id != LittleLong( IDBSPXHEADER ))
 		return -1;
 
+	bspx_header->id = LittleLong( bspx_header->id );
+	bspx_header->numlumps = LittleLong( bspx_header->numlumps );
+
+	for( int i = 0; i < bspx_header->numlumps; i++ )
+		le_struct_swap( dbspx_lump_swap, &bspx_header->lumps[i] );
+
 	Con_DPrintf( "Found valid BSPX signature at %lld\n", (long long)max_offset );
 	return max_offset;
 }
@@ -3918,22 +4243,19 @@ static qboolean Mod_LoadBmodelLumps( model_t *mod, byte *mod_base, size_t buffer
 {
 	dheader_t   *header = (dheader_t *)mod_base;
 	int         *extident = (int *)(mod_base + sizeof( dheader_t ));
-	dbspmodel_t *bmod = &srcmodel;
 	char        wadvalue[2048];
 	size_t      len = 0;
 	int         i, stat_index = 0, ret, flags = 0;
 	fs_offset_t bspx_header_offset;
 
 	// always reset the intermediate struct
-	memset( bmod, 0, sizeof( *bmod ));
 	memset( &loadstat, 0, sizeof( loadstat ));
 
 	Q_strncpy( loadstat.name, mod->name, sizeof( loadstat.name ));
 	wadvalue[0] = '\0';
 
-	// restore default lump numbers
-	srclumps[0].lumpnumber = LUMP_ENTITIES;
-	srclumps[1].lumpnumber = LUMP_PLANES;
+	// byte-swap BSP header and lump directory from little-endian
+	Mod_SwapBSPLumps( mod_base, bufferlen );
 
 	switch( header->version )
 	{
@@ -3947,8 +4269,7 @@ static qboolean Mod_LoadBmodelLumps( model_t *mod, byte *mod_base, size_t buffer
 			 Mod_LumpLooksLikeEntities( mod_base + header->lumps[LUMP_PLANES].fileofs, header->lumps[LUMP_PLANES].filelen ))
 		{
 			// blue-shift swapped lumps
-			srclumps[0].lumpnumber = LUMP_PLANES;
-			srclumps[1].lumpnumber = LUMP_ENTITIES;
+			SetBits( flags, LUMP_BSHIFT_SWAP );
 		}
 		break;
 	case Q1BSP_VERSION:
@@ -3962,6 +4283,7 @@ static qboolean Mod_LoadBmodelLumps( model_t *mod, byte *mod_base, size_t buffer
 		return false;
 	}
 
+	dbspmodel_t *bmod = Mem_Calloc( mod->mempool, sizeof( *bmod ));
 	bmod->version = header->version;	// share up global
 	if( isworld )
 	{
@@ -3974,17 +4296,17 @@ static qboolean Mod_LoadBmodelLumps( model_t *mod, byte *mod_base, size_t buffer
 
 	// loading base lumps
 	for( i = 0; i < ARRAYSIZE( srclumps ); i++, stat_index++ )
-		Mod_LoadLump( mod_base, &srclumps[i], &worldstats[stat_index], flags, LOADLUMP_STANDARD, NULL );
+		Mod_LoadLump( mod_base, &srclumps[i], &worldstats[stat_index], flags, LOADLUMP_STANDARD, NULL, bmod );
 
 	// loading extralumps
 	for( i = 0; i < ARRAYSIZE( extlumps ); i++, stat_index++ )
-		Mod_LoadLump( mod_base, &extlumps[i], &worldstats[stat_index], flags, LOADLUMP_BSP30EXT, NULL );
+		Mod_LoadLump( mod_base, &extlumps[i], &worldstats[stat_index], flags, LOADLUMP_BSP30EXT, NULL, bmod );
 
 	// loading bspx lumps
 	if( bspx_header_offset >= 0 )
 	{
 		for( i = 0; i < ARRAYSIZE( bspxlumps ); i++, stat_index++ )
-			Mod_LoadLump( mod_base, &bspxlumps[i], &worldstats[stat_index], flags, LOADLUMP_BSPX, mod_base + bspx_header_offset );
+			Mod_LoadLump( mod_base, &bspxlumps[i], &worldstats[stat_index], flags, LOADLUMP_BSPX, mod_base + bspx_header_offset, bmod );
 	}
 
 	if( !bmod->isworld ) // a1ba: why world excluded here?
@@ -3992,6 +4314,7 @@ static qboolean Mod_LoadBmodelLumps( model_t *mod, byte *mod_base, size_t buffer
 		if( loadstat.numerrors )
 		{
 			Con_DPrintf( "%s: %i error(s), %i warning(s)\n", __func__, loadstat.numerrors, loadstat.numwarnings );
+			Mem_Free( bmod );
 			return false; // there were errors, we can't load this map
 		}
 
@@ -4056,6 +4379,7 @@ static qboolean Mod_LoadBmodelLumps( model_t *mod, byte *mod_base, size_t buffer
 		Con_Reportf( "Wad files required to run the map: \"%s\"\n", wadvalue );
 	}
 
+	Mem_Free( bmod );
 	return true;
 }
 
@@ -4098,7 +4422,7 @@ qboolean Mod_TestBmodelLumps( file_t *f, const char *name, byte *mod_base, size_
 {
 	dheader_t   *header = (dheader_t *)mod_base;
 	int         *extident = (int *)( mod_base + sizeof( dheader_t ));
-	int         i, flags = LUMP_TESTONLY, stat_index = 0;
+	int         i, flags = 0, stat_index = 0;
 
 	// always reset the intermediate struct
 	memset( &loadstat, 0, sizeof( loadstat_t ));
@@ -4111,9 +4435,8 @@ qboolean Mod_TestBmodelLumps( file_t *f, const char *name, byte *mod_base, size_
 	if( buffersize < sizeof( *header ))
 		return false;
 
-	// restore default lump numbers
-	srclumps[0].lumpnumber = LUMP_ENTITIES;
-	srclumps[1].lumpnumber = LUMP_PLANES;
+	// byte-swap BSP header and lump directory from little-endian
+	Mod_SwapBSPLumps( mod_base, buffersize );
 
 	switch( header->version )
 	{
@@ -4136,11 +4459,7 @@ qboolean Mod_TestBmodelLumps( file_t *f, const char *name, byte *mod_base, size_
 					return false;
 
 				if( ret )
-				{
-					// blue-shift swapped lumps
-					srclumps[0].lumpnumber = LUMP_PLANES;
-					srclumps[1].lumpnumber = LUMP_ENTITIES;
-				}
+					SetBits( flags, LUMP_BSHIFT_SWAP );
 			}
 		}
 		break;
@@ -4156,15 +4475,15 @@ qboolean Mod_TestBmodelLumps( file_t *f, const char *name, byte *mod_base, size_
 	}
 
 	// get entities lump to caller
-	*entities = header->lumps[srclumps[0].lumpnumber];
+	*entities = header->lumps[FBitSet( flags, LUMP_BSHIFT_SWAP ) ? LUMP_PLANES : LUMP_ENTITIES];
 
 	// loading base lumps
 	for( i = 0; i < ARRAYSIZE( srclumps ); i++, stat_index++ )
-		Mod_LoadLump( mod_base, &srclumps[i], &worldstats[stat_index], flags, LOADLUMP_STANDARD, NULL );
+		Mod_LoadLump( mod_base, &srclumps[i], &worldstats[stat_index], flags, LOADLUMP_STANDARD, NULL, NULL );
 
 	// loading extralumps
 	for( i = 0; i < ARRAYSIZE( extlumps ); i++, stat_index++ )
-		Mod_LoadLump( mod_base, &extlumps[i], &worldstats[stat_index], flags, LOADLUMP_BSP30EXT, NULL );
+		Mod_LoadLump( mod_base, &extlumps[i], &worldstats[stat_index], flags, LOADLUMP_BSP30EXT, NULL, NULL );
 
 	// FIXME: BSPX testing
 

engine/common/mod_local.h

@@ -124,6 +124,10 @@ typedef struct world_static_s
 
 	wadentry_t   *wadlist;
 	int          wadcount;
+
+	// lightmapped water extra info
+	float        litwater_scale;
+	int          litwater_minlight;
 } world_static_t;
 
 #ifndef REF_DLL
@@ -181,7 +185,7 @@ void Mod_PrintWorldStats_f( void );
 //
 // mod_studio.c
 //
-void Mod_LoadStudioModel( model_t *mod, const void *buffer, qboolean *loaded );
+void Mod_LoadStudioModel( model_t *mod, void *buffer, size_t buffersize, qboolean *loaded );
 void Mod_InitStudioAPI( void );
 void Mod_InitStudioHull( void );
 void Mod_ResetStudioAPI( void );
@@ -191,13 +195,14 @@ void Mod_StudioGetAttachment( const edict_t *e, int iAttachment, float *org, flo
 void Mod_GetBonePosition( const edict_t *e, int iBone, float *org, float *ang );
 hull_t *Mod_HullForStudio( model_t *m, float frame, int seq, vec3_t ang, vec3_t org, vec3_t size, byte *pcnt, byte *pbl, int *hitboxes, edict_t *ed );
 void *R_StudioGetAnim( studiohdr_t *m_pStudioHeader, model_t *m_pSubModel, mstudioseqdesc_t *pseqdesc );
+void Mod_SwapStudioSeqGroupAnims( studiohdr_t *phdr, mstudioseqdesc_t *pseq, byte *buf );
 int Mod_HitgroupForStudioHull( int index );
 void Mod_ClearStudioCache( void );
 
 //
 // mod_sprite.c
 //
-void Mod_LoadSpriteModel( model_t *mod, const void *buffer, size_t buffersize, qboolean *loaded );
+void Mod_LoadSpriteModel( model_t *mod, void *buffer, size_t buffersize, qboolean *loaded );
 void Mod_SpriteLoadTextures( model_t *mod, const void *buffer );
 void Mod_SpriteUnloadTextures( void *data );
 

engine/common/mod_sprite.c

@@ -18,7 +18,168 @@ GNU General Public License for more details.
 #include "sprite.h"
 #include "studio.h"
 #include "mod_local.h"
+#include "swaplib.h"
 
+le_struct_begin( dsprite_q1_swap )
+	le_struct_field( dsprite_q1_t, ident )
+	le_struct_field( dsprite_q1_t, version )
+	le_struct_field( dsprite_q1_t, type )
+	le_struct_field( dsprite_q1_t, boundingradius )
+	le_struct_array( dsprite_q1_t, bounds, 2 )
+	le_struct_field( dsprite_q1_t, numframes )
+	le_struct_field( dsprite_q1_t, beamlength )
+	le_struct_field( dsprite_q1_t, synctype )
+le_struct_end();
+
+le_struct_begin( dsprite_hl_swap )
+	le_struct_field( dsprite_hl_t, ident )
+	le_struct_field( dsprite_hl_t, version )
+	le_struct_field( dsprite_hl_t, type )
+	le_struct_field( dsprite_hl_t, texFormat )
+	le_struct_field( dsprite_hl_t, boundingradius )
+	le_struct_array( dsprite_hl_t, bounds, 2 )
+	le_struct_field( dsprite_hl_t, numframes )
+	le_struct_field( dsprite_hl_t, facetype )
+	le_struct_field( dsprite_hl_t, synctype )
+le_struct_end();
+
+le_struct_begin( dspriteframe_swap )
+	le_struct_array( dspriteframe_t, origin, 2 )
+	le_struct_field( dspriteframe_t, width )
+	le_struct_field( dspriteframe_t, height )
+le_struct_end();
+
+static byte *Mod_SwapSpriteFrame( byte *p, byte *end, int bytes )
+{
+	dspriteframe_t frame;
+
+	if( p + sizeof( frame ) > end )
+		return NULL;
+
+	memcpy( &frame, p, sizeof( frame ));
+	le_struct_swap( dspriteframe_swap, &frame );
+#if XASH_BIG_ENDIAN
+	memcpy( p, &frame, sizeof( frame ));
+#endif
+	p += sizeof( frame );
+
+	// skip pixel data
+	if( p + frame.width * frame.height * bytes > end )
+		return NULL;
+
+	p += frame.width * frame.height * bytes;
+	return p;
+}
+
+static byte *Mod_SwapSpriteGroup( byte *p, byte *end, int bytes )
+{
+	dspritegroup_t *group;
+
+	if( p + sizeof( *group ) > end )
+		return NULL;
+
+	group = (dspritegroup_t *)p;
+	group->numframes = LittleLong( group->numframes );
+	p += sizeof( *group );
+
+	// swap intervals
+	int numframes = group->numframes;
+
+	if( p + numframes * sizeof( dspriteinterval_t ) > end )
+		return NULL;
+
+	for( int i = 0; i < numframes; i++ )
+	{
+		dspriteinterval_t *interval = (dspriteinterval_t *)p;
+		interval->interval = LittleFloat( interval->interval );
+		p += sizeof( *interval );
+	}
+
+	// swap each frame in the group
+	for( int i = 0; i < numframes; i++ )
+	{
+		p = Mod_SwapSpriteFrame( p, end, bytes );
+		if( !p )
+			return NULL;
+	}
+
+	return p;
+}
+
+static qboolean Mod_SwapSprite( void *buffer, size_t buffersize, int *out_version )
+{
+	byte *end = (byte *)buffer + buffersize;
+	int version, numframes, bytes;
+	byte *p;
+
+	if( buffersize < sizeof( dsprite_t ))
+		return false;
+
+	// peek at ident + version before full swap
+	version = LittleLong(((dsprite_t *)buffer)->version );
+
+	switch( version )
+	{
+	case SPRITE_VERSION_Q1:
+	case SPRITE_VERSION_32:
+		if( buffersize < sizeof( dsprite_q1_t ))
+			return false;
+		le_struct_swap( dsprite_q1_swap, buffer );
+		numframes = ((dsprite_q1_t *)buffer)->numframes;
+		p = (byte *)buffer + sizeof( dsprite_q1_t );
+		break;
+	case SPRITE_VERSION_HL:
+	{
+		if( buffersize < sizeof( dsprite_hl_t ))
+			return false;
+		le_struct_swap( dsprite_hl_swap, buffer );
+		numframes = ((dsprite_hl_t *)buffer)->numframes;
+		p = (byte *)buffer + sizeof( dsprite_hl_t );
+
+		// HL sprites have a palette count (short) + palette data
+		if( p + sizeof( short ) > end )
+			return false;
+
+		short numi = LittleShort( *(short *)p );
+		*(short *)p = numi;
+		p += sizeof( short ) + numi * 3;
+		break;
+	}
+	default:
+		return false;
+	}
+
+	*out_version = version;
+	bytes = ( version == SPRITE_VERSION_32 ) ? 4 : 1;
+
+	// swap all frames
+	for( int i = 0; i < numframes && p && p < end; i++ )
+	{
+		dframetype_t *frametype;
+
+		if( p + sizeof( *frametype ) > end )
+			return false;
+
+		frametype = (dframetype_t *)p;
+		frametype->type = LittleLong( frametype->type );
+		p += sizeof( *frametype );
+
+		switch( frametype->type )
+		{
+		case FRAME_SINGLE:
+			p = Mod_SwapSpriteFrame( p, end, bytes );
+			break;
+		case FRAME_GROUP:
+		case FRAME_ANGLED:
+			p = Mod_SwapSpriteGroup( p, end, bytes );
+			break;
+		default:
+			return false;
+		}
+	}
+
+	return true;
+}
 
 /*
 ====================
@@ -27,46 +188,18 @@ Mod_LoadSpriteModel
 load sprite model
 ====================
 */
-void Mod_LoadSpriteModel( model_t *mod, const void *buffer, size_t buffersize, qboolean *loaded )
+void Mod_LoadSpriteModel( model_t *mod, void *buffer, size_t buffersize, qboolean *loaded )
 {
-	const dsprite_t *pin = buffer;
 	msprite_t *psprite;
 	char poolname[MAX_VA_STRING];
+	int version;
 
 	if( loaded )
 		*loaded = false;
 
-	if( buffersize < sizeof( dsprite_t ))
+	if( !Mod_SwapSprite( buffer, buffersize, &version ))
 	{
-		Con_DPrintf( S_ERROR "%s: %s have incorrect file size %zu should be greater than %zu (%s)\n", __func__, mod->name, buffersize, sizeof( dsprite_t ), "basic header" );
-		return;
-	}
-
-	if( pin->ident != IDSPRITEHEADER )
-	{
-		Con_DPrintf( S_ERROR "%s: %s has wrong id (0x%x should be 0x%x)\n", __func__, mod->name, pin->ident, IDSPRITEHEADER );
-		return;
-	}
-
-	switch( pin->version )
-	{
-	case SPRITE_VERSION_Q1:
-	case SPRITE_VERSION_32:
-		if( buffersize < sizeof( dsprite_q1_t ))
-		{
-			Con_DPrintf( S_ERROR "%s: %s have incorrect file size %zu should be greater than %zu (%s)\n", __func__, mod->name, buffersize, sizeof( dsprite_q1_t ), "q1 header" );
-			return;
-		}
-		break;
-	case SPRITE_VERSION_HL:
-		if( buffersize < sizeof( dsprite_hl_t ))
-		{
-			Con_DPrintf( S_ERROR "%s: %s have incorrect file size %zu should be greater than %zu (%s)\n", __func__, mod->name, buffersize, sizeof( dsprite_hl_t ), "hl header" );
-			return;
-		}
-		break;
-	default:
-		Con_DPrintf( S_ERROR "%s: %s has wrong version number (%i should be %i, %i or %i)\n", __func__, mod->name, pin->version, SPRITE_VERSION_Q1, SPRITE_VERSION_32, SPRITE_VERSION_HL );
+		Con_DPrintf( S_ERROR "%s: %s is not a valid sprite\n", __func__, mod->name );
 		return;
 	}
 
@@ -74,9 +207,9 @@ void Mod_LoadSpriteModel( model_t *mod, const void *buffer, size_t buffersize, q
 	Q_snprintf( poolname, sizeof( poolname ), "^2%s^7", mod->name );
 	mod->mempool = Mem_AllocPool( poolname );
 
-	if( pin->version == SPRITE_VERSION_Q1 || pin->version == SPRITE_VERSION_32 )
+	if( version == SPRITE_VERSION_Q1 || version == SPRITE_VERSION_32 )
 	{
-		const dsprite_q1_t *pinq1 = buffer;
+		dsprite_q1_t *pinq1 = buffer;
 		size_t size;
 
 		if( pinq1->numframes == 0 )
@@ -106,9 +239,9 @@ void Mod_LoadSpriteModel( model_t *mod, const void *buffer, size_t buffersize, q
 		mod->mins[2] = -pinq1->bounds[1] * 0.5f;
 		mod->maxs[2] = pinq1->bounds[1] * 0.5f;
 	}
-	else // if( pin->version == SPRITE_VERSION_HL )
+	else // if( version == SPRITE_VERSION_HL )
 	{
-		const dsprite_hl_t *pinhl = buffer;
+		dsprite_hl_t *pinhl = buffer;
 		size_t size;
 
 		if( pinhl->numframes == 0 )

engine/common/mod_studio.c

@@ -19,6 +19,7 @@ GNU General Public License for more details.
 #include "r_studioint.h"
 #include "library.h"
 #include "ref_common.h"
+#include "swaplib.h"
 
 typedef int (*STUDIOAPI)( int, sv_blending_interface_t**, server_studio_api_t*,  float (*transform)[3][4], float (*bones)[MAXSTUDIOBONES][3][4] );
 
@@ -58,6 +59,151 @@ static int			cache_current;
 static int			cache_current_hull;
 static int			cache_current_plane;
 
+le_struct_begin( studiohdr_swap )
+	le_struct_field( studiohdr_t, ident )
+	le_struct_field( studiohdr_t, version )
+	le_struct_field( studiohdr_t, length )
+	le_struct_array( studiohdr_t, eyeposition, 3 )
+	le_struct_array( studiohdr_t, min, 3 )
+	le_struct_array( studiohdr_t, max, 3 )
+	le_struct_array( studiohdr_t, bbmin, 3 )
+	le_struct_array( studiohdr_t, bbmax, 3 )
+	le_struct_field( studiohdr_t, flags )
+	le_struct_field( studiohdr_t, numbones )
+	le_struct_field( studiohdr_t, boneindex )
+	le_struct_field( studiohdr_t, numbonecontrollers )
+	le_struct_field( studiohdr_t, bonecontrollerindex )
+	le_struct_field( studiohdr_t, numhitboxes )
+	le_struct_field( studiohdr_t, hitboxindex )
+	le_struct_field( studiohdr_t, numseq )
+	le_struct_field( studiohdr_t, seqindex )
+	le_struct_field( studiohdr_t, numseqgroups )
+	le_struct_field( studiohdr_t, seqgroupindex )
+	le_struct_field( studiohdr_t, numtextures )
+	le_struct_field( studiohdr_t, textureindex )
+	le_struct_field( studiohdr_t, texturedataindex )
+	le_struct_field( studiohdr_t, numskinref )
+	le_struct_field( studiohdr_t, numskinfamilies )
+	le_struct_field( studiohdr_t, skinindex )
+	le_struct_field( studiohdr_t, numbodyparts )
+	le_struct_field( studiohdr_t, bodypartindex )
+	le_struct_field( studiohdr_t, numattachments )
+	le_struct_field( studiohdr_t, attachmentindex )
+	le_struct_field( studiohdr_t, studiohdr2index )
+	le_struct_field( studiohdr_t, numtransitions )
+	le_struct_field( studiohdr_t, transitionindex )
+le_struct_end();
+
+le_struct_begin( mstudiobone_swap )
+	le_struct_field( mstudiobone_t, parent )
+	le_struct_field( mstudiobone_t, unused )
+	le_struct_array( mstudiobone_t, bonecontroller, 6 )
+	le_struct_array( mstudiobone_t, value, 6 )
+	le_struct_array( mstudiobone_t, scale, 6 )
+le_struct_end();
+
+le_struct_begin( mstudiobonecontroller_swap )
+	le_struct_field( mstudiobonecontroller_t, bone )
+	le_struct_field( mstudiobonecontroller_t, type )
+	le_struct_field( mstudiobonecontroller_t, start )
+	le_struct_field( mstudiobonecontroller_t, end )
+	le_struct_field( mstudiobonecontroller_t, unused )
+	le_struct_field( mstudiobonecontroller_t, index )
+le_struct_end();
+
+le_struct_begin( mstudiobbox_swap )
+	le_struct_field( mstudiobbox_t, bone )
+	le_struct_field( mstudiobbox_t, group )
+	le_struct_array( mstudiobbox_t, bbmin, 3 )
+	le_struct_array( mstudiobbox_t, bbmax, 3 )
+le_struct_end();
+
+le_struct_begin( mstudioseqgroup_swap )
+	// should we even swap seqgroup?
+	le_struct_field( mstudioseqgroup_t, unused )
+	le_struct_field( mstudioseqgroup_t, unused2 )
+le_struct_end();
+
+le_struct_begin( mstudioseqdesc_swap )
+	le_struct_field( mstudioseqdesc_t, fps )
+	le_struct_field( mstudioseqdesc_t, flags )
+	le_struct_field( mstudioseqdesc_t, activity )
+	le_struct_field( mstudioseqdesc_t, actweight )
+	le_struct_field( mstudioseqdesc_t, numevents )
+	le_struct_field( mstudioseqdesc_t, eventindex )
+	le_struct_field( mstudioseqdesc_t, numframes )
+	le_struct_field( mstudioseqdesc_t, weightlistindex )
+	le_struct_field( mstudioseqdesc_t, iklockindex )
+	le_struct_field( mstudioseqdesc_t, motiontype )
+	le_struct_field( mstudioseqdesc_t, motionbone )
+	le_struct_array( mstudioseqdesc_t, linearmovement, 3 )
+	le_struct_field( mstudioseqdesc_t, autolayerindex )
+	le_struct_field( mstudioseqdesc_t, keyvalueindex )
+	le_struct_array( mstudioseqdesc_t, bbmin, 3 )
+	le_struct_array( mstudioseqdesc_t, bbmax, 3 )
+	le_struct_field( mstudioseqdesc_t, numblends )
+	le_struct_field( mstudioseqdesc_t, animindex )
+	le_struct_array( mstudioseqdesc_t, blendtype, 2 )
+	le_struct_array( mstudioseqdesc_t, blendstart, 2 )
+	le_struct_array( mstudioseqdesc_t, blendend, 2 )
+	le_struct_field( mstudioseqdesc_t, seqgroup )
+	le_struct_field( mstudioseqdesc_t, entrynode )
+	le_struct_field( mstudioseqdesc_t, exitnode )
+	le_struct_field( mstudioseqdesc_t, animdescindex )
+le_struct_end();
+
+le_struct_begin( mstudioevent_swap )
+	le_struct_field( mstudioevent_t, frame )
+	le_struct_field( mstudioevent_t, event )
+	le_struct_field( mstudioevent_t, unused )
+le_struct_end();
+
+le_struct_begin( mstudioattachment_swap )
+	le_struct_field( mstudioattachment_t, flags )
+	le_struct_field( mstudioattachment_t, bone )
+	le_struct_array( mstudioattachment_t, org, 3 )
+le_struct_end();
+
+le_struct_begin( mstudiobodyparts_swap )
+	le_struct_field( mstudiobodyparts_t, nummodels )
+	le_struct_field( mstudiobodyparts_t, base )
+	le_struct_field( mstudiobodyparts_t, modelindex )
+le_struct_end();
+
+le_struct_begin( mstudiotexture_swap )
+	le_struct_field( mstudiotexture_t, flags )
+	le_struct_field( mstudiotexture_t, width )
+	le_struct_field( mstudiotexture_t, height )
+	le_struct_field( mstudiotexture_t, index )
+le_struct_end();
+
+le_struct_begin( mstudiomodel_swap )
+	le_struct_field( mstudiomodel_t, unused )
+	le_struct_field( mstudiomodel_t, unused2 )
+	le_struct_field( mstudiomodel_t, nummesh )
+	le_struct_field( mstudiomodel_t, meshindex )
+	le_struct_field( mstudiomodel_t, numverts )
+	le_struct_field( mstudiomodel_t, vertinfoindex )
+	le_struct_field( mstudiomodel_t, vertindex )
+	le_struct_field( mstudiomodel_t, numnorms )
+	le_struct_field( mstudiomodel_t, norminfoindex )
+	le_struct_field( mstudiomodel_t, normindex )
+	le_struct_field( mstudiomodel_t, blendvertinfoindex )
+	le_struct_field( mstudiomodel_t, blendnorminfoindex )
+le_struct_end();
+
+le_struct_begin( mstudiomesh_swap )
+	le_struct_field( mstudiomesh_t, numtris )
+	le_struct_field( mstudiomesh_t, triindex )
+	le_struct_field( mstudiomesh_t, skinref )
+	le_struct_field( mstudiomesh_t, numnorms )
+	le_struct_field( mstudiomesh_t, unused )
+le_struct_end();
+
+le_struct_begin( mstudioanim_swap )
+	le_struct_array( mstudioanim_t, offset, 6 )
+le_struct_end();
+
 /*
 ====================
 Mod_InitStudioHull
@@ -404,6 +550,38 @@ static void Mod_StudioCalcRotations( int boneused[], int numbones, const byte *p
 }
 
 
+void Mod_SwapStudioSeqGroupAnims( studiohdr_t *phdr, mstudioseqdesc_t *pseq, byte *buf )
+{
+	mstudioanim_t *panim = (mstudioanim_t *)( buf + pseq->animindex );
+	int numanims = pseq->numblends * phdr->numbones;
+
+	for( int j = 0; j < numanims; j++, panim++ )
+	{
+		le_struct_swap( mstudioanim_swap, panim );
+
+		for( int k = 0; k < 6; k++ )
+		{
+			if( panim->offset[k] == 0 )
+				continue;
+
+			mstudioanimvalue_t *panimvalue = (mstudioanimvalue_t *)((byte *)panim + panim->offset[k] );
+
+			int frames = pseq->numframes;
+			while( frames > 0 )
+			{
+				int valid = panimvalue->num.valid;
+				int total = panimvalue->num.total;
+
+				for( int l = 1; l <= valid; l++ )
+					panimvalue[l].value = LittleShort( panimvalue[l].value );
+
+				panimvalue += valid + 1;
+				frames -= total;
+			}
+		}
+	}
+}
+
 /*
 ====================
 StudioGetAnim
@@ -412,17 +590,10 @@ StudioGetAnim
 */
 void *R_StudioGetAnim( studiohdr_t *m_pStudioHeader, model_t *m_pSubModel, mstudioseqdesc_t *pseqdesc )
 {
-	mstudioseqgroup_t	*pseqgroup;
-	cache_user_t	*paSequences;
-	fs_offset_t	filesize;
-	byte		*buf;
-
-	pseqgroup = (mstudioseqgroup_t *)((byte *)m_pStudioHeader + m_pStudioHeader->seqgroupindex) + pseqdesc->seqgroup;
 	if( pseqdesc->seqgroup == 0 )
 		return ((byte *)m_pStudioHeader + pseqdesc->animindex);
 
-	paSequences = (cache_user_t *)m_pSubModel->submodels;
-
+	cache_user_t *paSequences = (cache_user_t *)m_pSubModel->submodels;
 	if( paSequences == NULL )
 	{
 		paSequences = (cache_user_t *)Mem_Calloc( com_studiocache, MAXSTUDIOGROUPS * sizeof( cache_user_t ));
@@ -432,23 +603,31 @@ void *R_StudioGetAnim( studiohdr_t *m_pStudioHeader, model_t *m_pSubModel, mstud
 	// check for already loaded
 	if( !Mod_CacheCheck(( cache_user_t *)&( paSequences[pseqdesc->seqgroup] )))
 	{
-		string	filepath, modelname, modelpath;
-
+		string modelname;
 		COM_FileBase( m_pSubModel->name, modelname, sizeof( modelname ));
+
+		string modelpath;
 		COM_ExtractFilePath( m_pSubModel->name, modelpath );
 
 		// NOTE: here we build real sub-animation filename because stupid user may rename model without recompile
+		string filepath;
 		Q_snprintf( filepath, sizeof( filepath ), "%s/%s%i%i.mdl", modelpath, modelname, pseqdesc->seqgroup / 10, pseqdesc->seqgroup % 10 );
 
-		buf = FS_LoadFile( filepath, &filesize, false );
-		if( !buf || !filesize ) Host_Error( "%s: can't load %s\n", __func__, filepath );
-		if( IDSEQGRPHEADER != *(uint *)buf ) Host_Error( "%s: %s is corrupted\n", __func__, filepath );
+		fs_offset_t filesize;
+		byte *buf = FS_LoadFile( filepath, &filesize, false );
+		if( !buf || !filesize )
+			Host_Error( "%s: can't load %s\n", __func__, filepath );
+		if( LittleLong( IDSEQGRPHEADER ) != *(uint *)buf )
+			Host_Error( "%s: %s is corrupted\n", __func__, filepath );
 
 		Con_Printf( "loading: %s\n", filepath );
 
 		paSequences[pseqdesc->seqgroup].data = Mem_Calloc( com_studiocache, filesize );
 		memcpy( paSequences[pseqdesc->seqgroup].data, buf, filesize );
 		Mem_Free( buf );
+
+		Mod_SwapStudioSeqGroupAnims( m_pStudioHeader, pseqdesc,
+			(byte *)paSequences[pseqdesc->seqgroup].data );
 	}
 
 	return ((byte *)paSequences[pseqdesc->seqgroup].data + pseqdesc->animindex);
@@ -690,7 +869,6 @@ static void Mod_StudioComputeBounds( void *buffer, vec3_t mins, vec3_t maxs, qbo
 	vec3_t		bone_mins, bone_maxs;
 	vec3_t		vert_mins, vert_maxs;
 	int		vert_count, bone_count;
-	int		bodyCount = 0;
 	vec3_t		pos, *pverts;
 
 	vert_count = bone_count = 0;
@@ -706,18 +884,16 @@ static void Mod_StudioComputeBounds( void *buffer, vec3_t mins, vec3_t maxs, qbo
 	// each body part has nummodels variations so there are as many total variations as there
 	// are in a matrix of each part by each other part
 	for( i = 0; i < pstudiohdr->numbodyparts; i++ )
-		bodyCount += pbodypart[i].nummodels;
-
-	// The studio models we want are vec3_t mins, vec3_t maxsight after the bodyparts (still need to
-	// find a detailed breakdown of the mdl format).  Move pointer there.
-	m_pSubModel = (mstudiomodel_t *)(&pbodypart[pstudiohdr->numbodyparts]);
-
-	for( i = 0; i < bodyCount; i++ )
 	{
-		pverts = (vec3_t *)((byte *)pstudiohdr + m_pSubModel[i].vertindex);
+		m_pSubModel = (mstudiomodel_t *)((byte *)pstudiohdr + pbodypart[i].modelindex);
 
-		for( j = 0; j < m_pSubModel[i].numverts; j++ )
-			Mod_StudioBoundVertex( bone_mins, bone_maxs, &vert_count, pverts[j] );
+		for( j = 0; j < pbodypart[i].nummodels; j++ )
+		{
+			pverts = (vec3_t *)((byte *)pstudiohdr + m_pSubModel[j].vertindex);
+
+			for( k = 0; k < m_pSubModel[j].numverts; k++ )
+				Mod_StudioBoundVertex( bone_mins, bone_maxs, &vert_count, pverts[k] );
+		}
 	}
 
 	pbones = (mstudiobone_t *)((byte *)pstudiohdr + pstudiohdr->boneindex);
@@ -820,26 +996,120 @@ static int Mod_StudioBodyVariations( model_t *mod )
 	return count;
 }
 
+static qboolean Mod_SwapStudioModel( const char *name, void *buffer, size_t buffersize )
+{
+	studiohdr_t *phdr = buffer;
+	byte *mod_base = buffer;
+
+	if( buffersize < sizeof( studiohdr_t ))
+		return false;
+
+	le_struct_swap( studiohdr_swap, phdr );
+
+	if( phdr->ident != IDSTUDIOHEADER || phdr->version != STUDIO_VERSION )
+		return false;
+
+#if XASH_BIG_ENDIAN
+	if( phdr->studiohdr2index > 0 && phdr->studiohdr2index < phdr->length )
+	{
+		Con_Printf( S_ERROR "byteswapping extended studio model \"%s\" is unsupoprted\n", name );
+		return false;
+	}
+#endif
+
+	for( int i = 0; i < phdr->numbones; i++ )
+		le_struct_swap( mstudiobone_swap, (mstudiobone_t *)( mod_base + phdr->boneindex ) + i );
+
+	for( int i = 0; i < phdr->numbonecontrollers; i++ )
+		le_struct_swap( mstudiobonecontroller_swap, (mstudiobonecontroller_t *)( mod_base + phdr->bonecontrollerindex ) + i );
+
+	for( int i = 0; i < phdr->numhitboxes; i++ )
+		le_struct_swap( mstudiobbox_swap, (mstudiobbox_t *)( mod_base + phdr->hitboxindex ) + i );
+
+	for( int i = 0; i < phdr->numseqgroups; i++ )
+		le_struct_swap( mstudioseqgroup_swap, (mstudioseqgroup_t *)( mod_base + phdr->seqgroupindex ) + i );
+
+	for( int i = 0; i < phdr->numattachments; i++ )
+	{
+		mstudioattachment_t *pattach = (mstudioattachment_t *)( mod_base + phdr->attachmentindex ) + i;
+		le_struct_swap( mstudioattachment_swap, pattach );
+		le_array_swap((float *)pattach->vectors, 3 * 3 );
+	}
+
+	for( int i = 0; i < phdr->numtextures; i++ )
+		le_struct_swap( mstudiotexture_swap, (mstudiotexture_t *)( mod_base + phdr->textureindex ) + i );
+
+	for( int i = 0; i < phdr->numbodyparts; i++ )
+		le_struct_swap( mstudiobodyparts_swap, (mstudiobodyparts_t *)( mod_base + phdr->bodypartindex ) + i );
+
+	for( int i = 0; i < phdr->numseq; i++ )
+	{
+		mstudioseqdesc_t *pseq = (mstudioseqdesc_t *)( mod_base + phdr->seqindex ) + i;
+		le_struct_swap( mstudioseqdesc_swap, pseq );
+
+		for( int j = 0; j < pseq->numevents; j++ )
+			le_struct_swap( mstudioevent_swap, (mstudioevent_t *)( mod_base + pseq->eventindex ) + j );
+
+		if( pseq->seqgroup != 0 )
+			continue;
+
+		Mod_SwapStudioSeqGroupAnims( phdr, pseq, mod_base );
+	}
+
+	for( int i = 0; i < phdr->numbodyparts; i++ )
+	{
+		mstudiobodyparts_t *pbodypart = (mstudiobodyparts_t *)( mod_base + phdr->bodypartindex ) + i;
+
+		for( int j = 0; j < pbodypart->nummodels; j++ )
+		{
+			mstudiomodel_t *pmodel = (mstudiomodel_t *)( mod_base + pbodypart->modelindex ) + j;
+			le_struct_swap( mstudiomodel_swap, pmodel );
+
+			le_array_swap((float *)( mod_base + pmodel->vertindex ), pmodel->numverts * 3 );
+			le_array_swap((float *)( mod_base + pmodel->normindex ), pmodel->numnorms * 3 );
+
+			for( int k = 0; k < pmodel->nummesh; k++ )
+			{
+				mstudiomesh_t *pmesh = (mstudiomesh_t *)( mod_base + pmodel->meshindex ) + k;
+				le_struct_swap( mstudiomesh_swap, pmesh );
+
+				short *ptricmds = (short *)( mod_base + pmesh->triindex );
+				short n;
+				while(( n = LittleShort( *ptricmds )))
+				{
+					*ptricmds++ = n;
+					int count = abs( n ) * 4;
+					for( int l = 0; l < count; l++, ptricmds++ )
+						*ptricmds = LittleShort( *ptricmds );
+				}
+				*ptricmds = 0;
+			}
+		}
+	}
+
+	short *pskinref = (short *)( mod_base + phdr->skinindex );
+	for( int i = 0; i < phdr->numskinfamilies * phdr->numskinref; i++ )
+		pskinref[i] = LittleShort( pskinref[i] );
+
+	return true;
+}
+
 /*
 =================
 R_StudioLoadHeader
 =================
 */
-static studiohdr_t *R_StudioLoadHeader( model_t *mod, const void *buffer )
+static studiohdr_t *R_StudioLoadHeader( model_t *mod, void *buffer, size_t buffersize )
 {
-	byte		*pin;
-	studiohdr_t	*phdr;
-	int		i;
+	studiohdr_t *phdr;
 
-	if( !buffer ) return NULL;
+	if( !buffer )
+		return NULL;
 
-	pin = (byte *)buffer;
-	phdr = (studiohdr_t *)pin;
-	i = phdr->version;
-
-	if( i != STUDIO_VERSION )
+	if( !Mod_SwapStudioModel( mod->name, buffer, buffersize ))
 	{
-		Con_Printf( S_ERROR "%s has wrong version number (%i should be %i)\n", mod->name, i, STUDIO_VERSION );
+		phdr = (studiohdr_t *)buffer;
+		Con_Printf( S_ERROR "%s has wrong version number (%i should be %i)\n", mod->name, phdr->version, STUDIO_VERSION );
 		return NULL;
 	}
 
@@ -867,7 +1137,7 @@ static studiohdr_t *Mod_MaybeTruncateStudioTextureData( model_t *mod )
 Mod_LoadStudioModel
 =================
 */
-void Mod_LoadStudioModel( model_t *mod, const void *buffer, qboolean *loaded )
+void Mod_LoadStudioModel( model_t *mod, void *buffer, size_t buffersize, qboolean *loaded )
 {
 	char poolname[MAX_VA_STRING];
 	studiohdr_t	*phdr;
@@ -879,7 +1149,7 @@ void Mod_LoadStudioModel( model_t *mod, const void *buffer, qboolean *loaded )
 	mod->mempool = Mem_AllocPool( poolname );
 	mod->type = mod_studio;
 
-	phdr = R_StudioLoadHeader( mod, buffer );
+	phdr = R_StudioLoadHeader( mod, buffer, buffersize );
 	if( !phdr || phdr->length < sizeof( studiohdr_t )) // garbage value in length
 		return;	// bad model
 
@@ -888,9 +1158,10 @@ void Mod_LoadStudioModel( model_t *mod, const void *buffer, qboolean *loaded )
 	{
 		studiohdr_t *thdr;
 		void *buffer2;
+		fs_offset_t size2_len;
 
-		buffer2 = FS_LoadFile( Mod_StudioTexName( mod->name ), NULL, false );
-		thdr = R_StudioLoadHeader( mod, buffer2 );
+		buffer2 = FS_LoadFile( Mod_StudioTexName( mod->name ), &size2_len, false );
+		thdr = R_StudioLoadHeader( mod, buffer2, size2_len );
 
 		if( thdr != NULL )
 		{

engine/common/model.c

@@ -347,7 +347,7 @@ model_t *Mod_LoadModel( model_t *mod, qboolean crash )
 	switch( *(uint *)buf )
 	{
 	case LittleLong( IDSTUDIOHEADER ):
-		Mod_LoadStudioModel( mod, buf, &loaded );
+		Mod_LoadStudioModel( mod, buf, length, &loaded );
 		break;
 	case LittleLong( IDSPRITEHEADER ):
 		Mod_LoadSpriteModel( mod, buf, length, &loaded );
@@ -608,6 +608,31 @@ void GAME_EXPORT Mod_LoadCacheFile( const char *filename, cache_user_t *cu )
 	cu->data = Mem_Malloc( com_studiocache, size );
 	memcpy( cu->data, buf, size );
 	Mem_Free( buf );
+
+	// this handles when studio model renderer tries to load sequence files on it's own
+	// which is what they always do in HLSDK
+#if XASH_BIG_ENDIAN
+	if( size >= sizeof( int ) && LittleLong( IDSEQGRPHEADER ) == *(uint *)cu->data )
+	{
+		studiohdr_t *phdr = (studiohdr_t *)REF_GET_PARM( PARM_GET_STUDIO_HDR, 0 );
+		if( !phdr )
+			return;
+
+		mstudioseqdesc_t *pseq = (mstudioseqdesc_t *)((byte *)phdr + phdr->seqindex );
+
+		for( int i = 0; i < phdr->numseq; i++ )
+		{
+			if( pseq[i].seqgroup == 0 )
+				continue;
+
+			mstudioseqgroup_t *pgrp = (mstudioseqgroup_t *)((byte *)phdr + phdr->seqgroupindex ) + pseq[i].seqgroup;
+
+			// assuming filename passes seqgroup's name
+			if( !Q_stricmp( pgrp->name, filename ))
+				Mod_SwapStudioSeqGroupAnims( phdr, &pseq[i], (byte *)cu->data );
+		}
+	}
+#endif
 }
 
 /*

engine/common/net_buffer.c

@@ -321,8 +321,10 @@ void MSG_WriteUBitLong( sizebuf_t *sb, uint curData, int numbits )
 	}
 
 	iCurBitMasked = iCurBit & 31;
-	((uint32_t *)sb->pData)[iDWord] &= BitWriteMasks[iCurBitMasked][nBitsLeft-1];
-	((uint32_t *)sb->pData)[iDWord] |= curData << iCurBitMasked;
+	uint32_t dword = LittleLong(((uint32_t *)sb->pData)[iDWord] );
+	dword &= BitWriteMasks[iCurBitMasked][nBitsLeft-1];
+	dword |= curData << iCurBitMasked;
+	((uint32_t *)sb->pData)[iDWord] = LittleLong( dword );
 
 	// did it span a dword?
 	nBitsWritten = 32 - iCurBitMasked;
@@ -334,8 +336,10 @@ void MSG_WriteUBitLong( sizebuf_t *sb, uint curData, int numbits )
 		curData >>= nBitsWritten;
 
 		iCurBitMasked = iCurBit & 31;
-		((uint32_t *)sb->pData)[iDWord+1] &= BitWriteMasks[iCurBitMasked][nBitsLeft-1];
-		((uint32_t *)sb->pData)[iDWord+1] |= curData << iCurBitMasked;
+		uint32_t dword2 = LittleLong(((uint32_t *)sb->pData)[iDWord+1] );
+		dword2 &= BitWriteMasks[iCurBitMasked][nBitsLeft-1];
+		dword2 |= curData << iCurBitMasked;
+		((uint32_t *)sb->pData)[iDWord+1] = LittleLong( dword2 );
 	}
 	sb->iCurBit += numbits;
 }
@@ -396,7 +400,8 @@ qboolean MSG_WriteBits( sizebuf_t *sb, const void *pData, int nBits )
 	// read dwords.
 	while( nBitsLeft >= 32 )
 	{
-		MSG_WriteUBitLong( sb, *(( uint32_t *)pOut ), 32 );
+		uint32_t dword = *((uint32_t *)pOut);
+		MSG_WriteUBitLong( sb, LittleLong( dword ), 32 );
 
 		pOut += sizeof( uint32_t );
 		nBitsLeft -= 32;
@@ -519,7 +524,7 @@ void MSG_WriteDword( sizebuf_t *sb, uint val )
 
 void MSG_WriteFloat( sizebuf_t *sb, float val )
 {
-	MSG_WriteBits( sb, &val, sizeof( val ) << 3 );
+	MSG_WriteUBitLong( sb, FloatAsUint( val ), sizeof( val ) << 3 );
 }
 
 qboolean MSG_WriteBytes( sizebuf_t *sb, const void *pBuf, int nBytes )
@@ -593,7 +598,7 @@ uint MSG_ReadUBitLong( sizebuf_t *sb, int numbits )
 
 	// Read the current dword.
 	idword1 = sb->iCurBit >> 5;
-	dword1 = ((uint *)sb->pData)[idword1];
+	dword1 = LittleLong(((uint *)sb->pData)[idword1] );
 	dword1 >>= ( sb->iCurBit & 31 );	// get the bits we're interested in.
 
 	sb->iCurBit += numbits;
@@ -608,7 +613,7 @@ uint MSG_ReadUBitLong( sizebuf_t *sb, int numbits )
 	else
 	{
 		int	nExtraBits = sb->iCurBit & 31;
-		uint	dword2 = ((uint *)sb->pData)[idword1+1] & ExtraMasks[nExtraBits];
+		uint	dword2 = LittleLong(((uint *)sb->pData)[idword1+1] ) & ExtraMasks[nExtraBits];
 
 		// no need to mask since we hit the end of the dword.
 		// shift the second dword's part into the high bits.
@@ -633,7 +638,8 @@ qboolean MSG_ReadBits( sizebuf_t *sb, void *pOutData, int nBits )
 	// read dwords.
 	while( nBitsLeft >= 32 )
 	{
-		*((uint32_t *)pOut) = MSG_ReadUBitLong( sb, 32 );
+		uint32_t dword = MSG_ReadUBitLong( sb, 32 );
+		*((uint32_t *)pOut) = LittleLong( dword );
 		pOut += sizeof( uint32_t );
 		nBitsLeft -= 32;
 	}
@@ -790,11 +796,7 @@ uint MSG_ReadDword( sizebuf_t *sb )
 
 float MSG_ReadFloat( sizebuf_t *sb )
 {
-	float	ret;
-
-	MSG_ReadBits( sb, &ret, sizeof( ret ) << 3 );
-
-	return ret;
+	return UintAsFloat( MSG_ReadUBitLong( sb, sizeof( float ) << 3 ));
 }
 
 qboolean MSG_ReadBytes( sizebuf_t *sb, void *pOut, int nBytes )

engine/common/net_chan.c

@@ -617,7 +617,10 @@ void Netchan_AddBufferToList( fragbuf_t **pplist, fragbuf_t *pbuf )
 		if( id1 > id2 )
 		{
 			// insert here
-			pbuf->next = n->next;
+			// pbuf->next = n->next;
+
+			// a1ba: this seems to be incorrect insertion, as `n` gets removed from list and effectively leaked
+			pbuf->next = n;
 			pprev->next = pbuf;
 			return;
 		}
@@ -1237,20 +1240,24 @@ qboolean Netchan_CopyFileFragments( netchan_t *chan, sizebuf_t *msg )
 		return false;
 	}
 
-	if( filename[0] != '!' )
-	{
-		string temp_filename;
-		Q_snprintf( temp_filename, sizeof( temp_filename ), DEFAULT_DOWNLOADED_DIRECTORY "%s", filename );
-		Q_strncpy( filename, temp_filename, sizeof( filename ));
-	}
-
 	Q_strncpy( chan->incomingfilename, filename, sizeof( chan->incomingfilename ));
 
-	if( filename[0] != '!' && FS_FileExists( filename, false ))
+	if( filename[0] != '!' )
 	{
-		Con_Printf( S_ERROR "can't download %s, already exists\n", filename );
-		Netchan_FlushIncoming( chan, FRAG_FILE_STREAM );
-		return true;
+		string write_path;
+		Q_snprintf( write_path, sizeof( write_path ), "../%s" DEFAULT_DOWNLOADED_DIRECTORY_SUFFIX "/%s", GI->gamefolder, filename );
+		Q_strncpy( filename, write_path, sizeof( filename ));
+
+		FS_AllowDirectPaths( true );
+		qboolean exists = FS_FileExists( filename, false );
+		FS_AllowDirectPaths( false );
+
+		if( exists )
+		{
+			Con_Printf( S_ERROR "can't download %s, already exists\n", filename );
+			Netchan_FlushIncoming( chan, FRAG_FILE_STREAM );
+			return true;
+		}
 	}
 
 	// create file from buffers
@@ -1314,14 +1321,14 @@ qboolean Netchan_CopyFileFragments( netchan_t *chan, sizebuf_t *msg )
 		Host_Error( "%s: BZ2 compression is not supported for server", __func__ );
 #endif
 	}
-	else if( chan->use_lzss && LZSS_IsCompressed( buffer, nsize + 1 ))
+	else if( chan->use_lzss && LZSS_IsCompressed( buffer, nsize ))
 	{
 		byte *uncompressedBuffer;
 
-		uncompressedSize = LZSS_GetActualSize( buffer, nsize + 1 ) + 1;
+		uncompressedSize = LZSS_GetActualSize( buffer, nsize );
 		uncompressedBuffer = Mem_Calloc( net_mempool, uncompressedSize );
 
-		nsize = LZSS_Decompress( buffer, uncompressedBuffer, nsize + 1, uncompressedSize );
+		nsize = LZSS_Decompress( buffer, uncompressedBuffer, nsize, uncompressedSize );
 		Mem_Free( buffer );
 		buffer = uncompressedBuffer;
 	}
@@ -1336,8 +1343,9 @@ qboolean Netchan_CopyFileFragments( netchan_t *chan, sizebuf_t *msg )
 	}
 	else
 	{
-		// g-cont. it's will be stored downloaded files directly into game folder
+		FS_AllowDirectPaths( true );
 		FS_WriteFile( filename, buffer, nsize );
+		FS_AllowDirectPaths( false );
 		Mem_Free( buffer );
 	}
 

engine/common/net_ws.c

@@ -99,6 +99,7 @@ typedef struct
 	int		sequence_number;
 	int		ip_sockets[NS_COUNT];
 	int		ip6_sockets[NS_COUNT];
+	qboolean		rr_state[NS_COUNT];
 	qboolean		initialized;
 	qboolean		threads_initialized;
 	qboolean		configured;
@@ -132,7 +133,7 @@ static CVAR_DEFINE_AUTO( net6_address, "0", FCVAR_PRIVILEGED|FCVAR_READ_ONLY, "c
 
 static void NET_ClearLagData( qboolean bClient, qboolean bServer );
 
-static inline qboolean NET_IsSocketError( int retval )
+qboolean NET_IsSocketError( int retval )
 {
 #if XASH_WIN32 || XASH_DOS4GW
 	return retval == SOCKET_ERROR ? true : false;
@@ -141,7 +142,7 @@ static inline qboolean NET_IsSocketError( int retval )
 #endif
 }
 
-static inline qboolean NET_IsSocketValid( int socket )
+qboolean NET_IsSocketValid( int socket )
 {
 #if XASH_WIN32 || XASH_DOS4GW
 	return socket != INVALID_SOCKET;
@@ -150,6 +151,24 @@ static inline qboolean NET_IsSocketValid( int socket )
 #endif
 }
 
+qboolean NET_MakeSocketNonBlocking( int socket_fd )
+{
+#if XASH_LINUX
+	int res = fcntl( socket_fd, F_GETFL, 0 );
+	if( NET_IsSocketError( res ))
+		return false;
+
+	// SOCK_NONBLOCK is not portable, so use fcntl
+	if( NET_IsSocketError( fcntl( socket_fd, F_SETFL, res | O_NONBLOCK )))
+		return false;
+#else
+	uint mode = 1;
+	if( NET_IsSocketError( ioctlsocket( socket_fd, FIONBIO, (void*)&mode )))
+		return false;
+#endif
+	return true;
+}
+
 void NET_NetadrToIP6Bytes( uint8_t *ip6, const netadr_t *adr )
 {
 	memcpy( &ip6[0], adr->ip6_0, 2 );
@@ -177,7 +196,7 @@ static int NET_NetadrIP6Compare( const netadr_t *a, const netadr_t *b )
 NET_NetadrToSockadr
 ====================
 */
-static void NET_NetadrToSockadr( netadr_t *a, struct sockaddr_storage *s )
+void NET_NetadrToSockadr( netadr_t *a, struct sockaddr_storage *s )
 {
 	netadrtype_t type = NET_NetadrType( a );
 
@@ -214,7 +233,7 @@ static void NET_NetadrToSockadr( netadr_t *a, struct sockaddr_storage *s )
 NET_SockadrToNetAdr
 ====================
 */
-static void NET_SockadrToNetadr( const struct sockaddr_storage *s, netadr_t *a )
+void NET_SockadrToNetadr( const struct sockaddr_storage *s, netadr_t *a )
 {
 	if( s->ss_family == AF_INET )
 	{
@@ -1330,70 +1349,60 @@ NET_QueuePacket
 queue normal and lagged packets
 ==================
 */
-static qboolean NET_QueuePacket( netsrc_t sock, netadr_t *from, byte *data, size_t *length )
+static qboolean NET_QueuePacket( int net_socket, netsrc_t sock, netadr_t *from, byte *data, size_t *length )
 {
 	byte		buf[NET_MAX_FRAGMENT];
-	int		ret, protocol;
-	int		net_socket;
+	int		ret;
 	WSAsize_t	addr_len;
 	struct sockaddr_storage	addr = { 0 };
 
 	*length = 0;
 
-	for( protocol = 0; protocol < 2; protocol++ )
+	if( !NET_IsSocketValid( net_socket ))
+		return NET_LagPacket( false, sock, from, length, data );
+
+	addr_len = sizeof( addr );
+	ret = recvfrom( net_socket, buf, sizeof( buf ), 0, (struct sockaddr *)&addr, &addr_len );
+
+	NET_SockadrToNetadr( &addr, from );
+
+	if( !NET_IsSocketError( ret ))
 	{
-		switch( protocol )
+		if( ret < NET_MAX_FRAGMENT )
 		{
-		case 0: net_socket = net.ip_sockets[sock]; break;
-		case 1: net_socket = net.ip6_sockets[sock]; break;
-		}
-
-		if( !NET_IsSocketValid( net_socket ))
-			continue;
-
-		addr_len = sizeof( addr );
-		ret = recvfrom( net_socket, buf, sizeof( buf ), 0, (struct sockaddr *)&addr, &addr_len );
-
-		NET_SockadrToNetadr( &addr, from );
-
-		if( !NET_IsSocketError( ret ))
-		{
-			if( ret < NET_MAX_FRAGMENT )
-			{
-				// Transfer data
-				memcpy( data, buf, ret );
-				*length = ret;
+			// Transfer data
+			memcpy( data, buf, ret );
+			*length = ret;
 
 #if !XASH_DEDICATED
-				// check for split message
-				if( sock == NS_CLIENT && *(int *)data == NET_HEADER_SPLITPACKET )
-					return NET_GetLong( data, ret, length, CL_GetSplitSize( ), CL_Protocol( ));
+			// check for split message
+			if( sock == NS_CLIENT && *(int *)data == NET_HEADER_SPLITPACKET )
+				return NET_GetLong( data, ret, length, CL_GetSplitSize( ), CL_Protocol( ));
 #endif
 
-				// lag the packet, if needed
-				return NET_LagPacket( true, sock, from, length, data );
-			}
-			else
-			{
-				Con_Reportf( "%s: oversize packet from %s\n", __func__, NET_AdrToString( *from ));
-			}
+			// lag the packet, if needed
+			return NET_LagPacket( true, sock, from, length, data );
 		}
 		else
 		{
-			int	err = WSAGetLastError();
+			Con_Reportf( "%s: oversize packet from %s\n", __func__, NET_AdrToString( *from ));
+		}
+	}
+	else
+	{
+		int	err = WSAGetLastError();
 
-			switch( err )
-			{
-			case WSAEWOULDBLOCK:
-			case WSAECONNRESET:
-			case WSAECONNREFUSED:
-			case WSAEMSGSIZE:
-			case WSAETIMEDOUT:
-				break;
-			default:	// let's continue even after errors
-				Con_DPrintf( S_ERROR "%s: %s from %s\n", __func__, NET_ErrorString(), NET_AdrToString( *from ));
-				break;
-			}
+		switch( err )
+		{
+		case WSAEWOULDBLOCK:
+		case WSAECONNRESET:
+		case WSAECONNREFUSED:
+		case WSAEMSGSIZE:
+		case WSAETIMEDOUT:
+			break;
+		default:	// let's continue even after errors
+			Con_DPrintf( S_ERROR "%s: %s from %s\n", __func__, NET_ErrorString(), NET_AdrToString( *from ));
+			break;
 		}
 	}
 
@@ -1420,7 +1429,20 @@ qboolean NET_GetPacket( netsrc_t sock, netadr_t *from, byte *data, size_t *lengt
 	}
 	else
 	{
-		return NET_QueuePacket( sock, from, data, length );
+		// Round-robin the socket to prevent constant activity on one starving the other.
+		int i = net.rr_state[sock];
+		int net_socket = i ? net.ip_sockets[sock] : net.ip6_sockets[sock];
+
+		if( NET_QueuePacket( net_socket, sock, from, data, length ))
+		{
+			net.rr_state[sock] = !i;
+			return true;
+		}
+
+		// try the other one before giving up
+		net_socket = i ? net.ip6_sockets[sock] : net.ip_sockets[sock];
+		net.rr_state[sock] = !i;
+		return NET_QueuePacket( net_socket, sock, from, data, length );
 	}
 }
 
@@ -1591,7 +1613,7 @@ static int NET_IPSocket( const char *net_iface, int port, int family )
 		return INVALID_SOCKET;
 	}
 
-	if( NET_IsSocketError( ioctlsocket( net_socket, FIONBIO, (void*)&_true )))
+	if( !NET_MakeSocketNonBlocking( net_socket ))
 	{
 		struct timeval timeout;
 
@@ -1994,6 +2016,7 @@ void NET_Init( void )
 		net.lagdata[i].next = &net.lagdata[i];
 		net.ip_sockets[i]  = INVALID_SOCKET;
 		net.ip6_sockets[i] = INVALID_SOCKET;
+		net.rr_state[i] = false;
 	}
 
 #if XASH_WIN32

engine/common/net_ws.h

@@ -74,6 +74,9 @@ void NET_SendPacket( netsrc_t sock, size_t length, const void *data, netadr_t to
 void NET_SendPacketEx( netsrc_t sock, size_t length, const void *data, netadr_t to, size_t splitsize );
 void NET_IP6BytesToNetadr( netadr_t *adr, const uint8_t *ip6 );
 void NET_NetadrToIP6Bytes( uint8_t *ip6, const netadr_t *adr );
+qboolean NET_IsSocketError( int retval );
+qboolean NET_IsSocketValid( int socket );
+qboolean NET_MakeSocketNonBlocking( int socket_fd );
 
 static inline qboolean NET_IsLocalAddress( netadr_t adr )
 {

engine/common/net_ws_private.h

@@ -101,3 +101,5 @@ static inline socklen_t NET_SockAddrLen( const struct sockaddr_storage *addr )
 }
 
 net_gai_state_t NET_StringToSockaddr( const char *s, struct sockaddr_storage *sadr, qboolean nonblocking, int family );
+void NET_NetadrToSockadr( netadr_t *a, struct sockaddr_storage *s );
+void NET_SockadrToNetadr( const struct sockaddr_storage *s, netadr_t *a );

engine/common/soundlib/snd_utils.c

@@ -84,37 +84,37 @@ void Sound_Shutdown( void )
 
 uint GAME_EXPORT Sound_GetApproxWavePlayLen( const char *filepath )
 {
-	string    name;
-	file_t    *f;
-	wavehdr_t wav;
-	size_t    filesize;
-	uint      msecs;
-
+	string name;
 	Q_strncpy( name, filepath, sizeof( name ));
 	COM_FixSlashes( name );
 
-	f = FS_Open( name, "rb", false );
+	file_t *f = FS_Open( name, "rb", false );
 	if( !f )
 		return 0;
 
+	wavehdr_t wav;
 	if( FS_Read( f, &wav, sizeof( wav )) != sizeof( wav ))
 	{
 		FS_Close( f );
 		return 0;
 	}
 
-	filesize = FS_FileLength( f );
-	filesize -= 128; // magic number from GoldSrc, seems to be header size
+	// magic number from GoldSrc, seems to be header size
+	size_t filesize = FS_FileLength( f ) - 128;
 
 	FS_Close( f );
 
 	// is real wav file ?
-	if( wav.riff_id != RIFFHEADER || wav.wave_id != WAVEHEADER || wav.fmt_id != FORMHEADER )
+	if( wav.riff_id != LittleLong( RIFFHEADER ) || wav.wave_id != LittleLong( WAVEHEADER ) || wav.fmt_id != LittleLong( FORMHEADER ))
 		return 0;
 
-	if( wav.nAvgBytesPerSec >= 1000 )
-		msecs = (uint)((float)filesize / ((float)wav.nAvgBytesPerSec / 1000.0f));
-	else msecs = (uint)(((float)filesize / (float)wav.nAvgBytesPerSec) * 1000.0f);
+	int avgBytes = LittleLong( wav.nAvgBytesPerSec );
+	uint msecs;
+
+	if( avgBytes >= 1000 )
+		msecs = (uint)((float)filesize / ((float)avgBytes / 1000.0f));
+	else
+		msecs = (uint)(((float)filesize / (float)avgBytes) * 1000.0f);
 
 	return msecs;
 }

engine/common/sys_con.c

@@ -61,6 +61,8 @@ SYSTEM LOG
 */
 int Sys_LogFileNo( void )
 {
+	if( !s_ld.logfile )
+		return -1;
 	return s_ld.logfileno;
 }
 
@@ -84,7 +86,7 @@ void Sys_InitLog( void )
 
 	if( Sys_CheckParm( "-log" ))
 	{
-		if( !Sys_GetParmFromCmdLine( "-log", s_ld.log_path ) || !isalnum( s_ld.log_path[0] ))
+		if( !Sys_GetParmFromCmdLine( "-log", s_ld.log_path ) || !isalnum((byte)s_ld.log_path[0] ))
 			Q_strncpy( s_ld.log_path, "engine.log", sizeof( s_ld.log_path ));
 
 		COM_DefaultExtension( s_ld.log_path, ".log", sizeof( s_ld.log_path ));
@@ -104,7 +106,17 @@ void Sys_InitLog( void )
 	// create log if needed
 	if( s_ld.log_active )
 	{
-		s_ld.logfile = fopen( s_ld.log_path, mode );
+		const char *basedir = getenv( "XASH3D_BASEDIR" );
+
+		if( !COM_StringEmptyOrNULL( basedir ) && s_ld.log_path[0] != '/' )
+		{
+			char fullpath[MAX_SYSPATH];
+			Q_snprintf( fullpath, sizeof( fullpath ), "%s/%s", basedir, s_ld.log_path );
+			s_ld.logfile = fopen( fullpath, mode );
+		}
+
+		if( !s_ld.logfile )
+			s_ld.logfile = fopen( s_ld.log_path, mode );
 
 		if ( !s_ld.logfile )
 		{

engine/platform/android/lib_android.c

@@ -22,41 +22,69 @@ GNU General Public License for more details.
 
 void *ANDROID_LoadLibrary( const char *path )
 {
-	const char *libdir[2], *name = COM_FileWithoutPath( path );
-	char fullpath[MAX_SYSPATH];
+	const char *name = COM_FileWithoutPath( path );
 	void *handle;
 
-	libdir[0] = getenv( "XASH3D_GAMELIBDIR" ); // TODO: remove this once distributing games from APKs will be deprecated
-	libdir[1] = NULL; // TODO: put here data directory where libraries will be downloaded to
+	Con_Reportf( "%s: loading \"%s\" (name: \"%s\")\n", __func__, path, name );
 
-	for( int i = 0; i < ARRAYSIZE( libdir ); i++ )
+	// TODO: remove this once distributing games from APKs will be deprecated
+	const char *gamelibdir = getenv( "XASH3D_GAMELIBDIR" );
+	if( !COM_StringEmptyOrNULL( gamelibdir ))
 	{
-		// this is an APK directory, get base path
-		const char *p = i == 0 ? name : path;
+		char fullpath[MAX_SYSPATH];
+		Q_snprintf( fullpath, sizeof( fullpath ), "%s/%s", gamelibdir, name );
 
-		if( !libdir[i] )
-			continue;
-
-		Q_snprintf( fullpath, sizeof( fullpath ), "%s/%s", libdir[i], p );
+		Con_Reportf( "%s: trying APK path \"%s\"\n", __func__, fullpath );
 
 		handle = dlopen( fullpath, RTLD_NOW );
-
 		if( handle )
 		{
-			Con_Reportf( "%s: loading library %s successful\n", __func__, fullpath );
+			Con_Reportf( "%s: loaded from APK path\n", __func__ );
 			return handle;
 		}
 
+		Con_Reportf( "%s: APK path failed: %s\n", __func__, dlerror() );
 		COM_PushLibraryError( dlerror() );
 	}
 
-	// find in system search path, that includes our APK
+	// try VFS
+	dll_user_t *hInst = FS_FindLibrary( path, false );
+	if( hInst )
+	{
+		Con_Reportf( "%s: VFS found \"%s\"\n", __func__, hInst->fullPath );
+		if( !hInst->custom_loader )
+		{
+			char libpath[MAX_SYSPATH];
+			Q_strncpy( libpath, hInst->fullPath, sizeof( libpath ));
+			Mem_Free( hInst );
+
+			handle = dlopen( libpath, RTLD_NOW );
+			if( handle )
+			{
+				Con_Reportf( "%s: loaded from VFS path\n", __func__ );
+				return handle;
+			}
+			Con_Reportf( "%s: VFS dlopen failed: %s\n", __func__, dlerror() );
+			COM_PushLibraryError( dlerror() );
+		}
+		else
+		{
+			Con_Reportf( "%s: VFS entry has custom loader, skipping\n", __func__ );
+			COM_PushLibraryError( "custom loader not available on Android" );
+			Mem_Free( hInst );
+		}
+	}
+
+	// find in system search path (APK's LD_LIBRARY_PATH)
+	Con_Reportf( "%s: trying LD_LIBRARY_PATH for \"%s\"\n", __func__, name );
 	handle = dlopen( name, RTLD_NOW );
 	if( handle )
 	{
-		Con_Reportf( "%s: loading library %s from LD_LIBRARY_PATH successful\n", __func__, name );
+		Con_Reportf( "%s: loaded from LD_LIBRARY_PATH\n", __func__ );
 		return handle;
 	}
+
+	Con_Reportf( "%s: all paths failed for \"%s\"\n", __func__, path );
 	COM_PushLibraryError( dlerror() );
 
 	return NULL;

engine/platform/platform.h

@@ -225,11 +225,13 @@ static inline void Sys_RestoreCrashHandler( void )
 static inline qboolean Platform_LibraryExists( const char *name, qboolean gamedironly )
 {
 #if XASH_ANDROID
-	// sorry, unimplemented
-	return false;
-#else
-	return g_fsapi.FileExists( name, gamedironly );
+	// when libs come from a separate APK (cs16client, tf15client, …) we can't see them
+	// from the VFS; trust the launcher.
+	if( !COM_StringEmptyOrNULL( getenv( "XASH3D_GAMELIBDIR" )))
+		return true;
 #endif
+	// FIXME: use FS_FindLibrary
+	return g_fsapi.FileExists( name, gamedironly );
 }
 
 

engine/platform/posix/crash_libbacktrace.c

@@ -27,15 +27,10 @@ static qboolean enable_libbacktrace;
 
 static void Sys_BacktraceError( void *data, const char *msg, int errnum )
 {
-	if( errnum < 0 )
-	{
-		Con_Printf( S_ERROR "no symbol info, no libbacktrace\n" );
-		return;
-	}
+	Con_Printf( S_ERROR "libbacktrace: %s (%d)\n", msg, errnum );
 
-	Con_Printf( S_ERROR "libbacktrace error: %s (%d)\n", msg, errnum );
-
-	enable_libbacktrace = false;
+	if( errnum > 0 )
+		enable_libbacktrace = false;
 }
 
 struct print_data
@@ -45,8 +40,16 @@ struct print_data
 	int len;
 	int idx;
 	int logfd;
+	qboolean skip_wrappers;
 };
 
+static qboolean Sys_IsCrashHandlerFrame( const char *name )
+{
+	if( !name )
+		return false;
+	return !Q_strcmp( name, "Sys_Crash" ) || !Q_strcmp( name, "Sys_CrashDetailsLibbacktrace" );
+}
+
 static void Sys_AppendPrint( struct print_data *pd, const char *fmt, ... )
 {
 	va_list va;
@@ -58,13 +61,10 @@ static void Sys_AppendPrint( struct print_data *pd, const char *fmt, ... )
 
 	if( len > 0 )
 	{
-		char ch = '\n';
-
-		write( pd->logfd, pd->message, len );
-		write( pd->logfd, &ch, 1 );
+		if( pd->logfd >= 0 )
+			write( pd->logfd, pd->message, len );
 
 		write( STDERR_FILENO, pd->message, len );
-		write( STDERR_FILENO, &ch, 1 );
 
 		pd->message += len;
 		pd->len += len;
@@ -84,6 +84,13 @@ static void Sys_BacktracePrintSyminfo( void *data, uintptr_t pc, const char *sym
 	Dl_info dlinfo = { 0 };
 	const char *module_name;
 
+	if( pd->skip_wrappers )
+	{
+		if( Sys_IsCrashHandlerFrame( symname ))
+			return;
+		pd->skip_wrappers = false;
+	}
+
 	if( dladdr((void *)pc, &dlinfo ))
 		module_name = dlinfo.dli_fname;
 	else module_name = NULL;
@@ -110,6 +117,13 @@ static int Sys_BacktracePrintFull( void *data, uintptr_t pc, const char *filenam
 	Dl_info dlinfo = { 0 };
 	const char *module_name;
 
+	if( pd->skip_wrappers )
+	{
+		if( Sys_IsCrashHandlerFrame( function ))
+			return 0;
+		pd->skip_wrappers = false;
+	}
+
 	if( dladdr((void *)pc, &dlinfo ))
 		module_name = dlinfo.dli_fname;
 	else module_name = NULL;
@@ -136,12 +150,13 @@ int Sys_CrashDetailsLibbacktrace( int logfd, char *message, int len, size_t max_
 	struct print_data pd =
 	{
 		.message = message + len,
-		.message_size = sizeof( message ) - len,
+		.message_size = max_len - len,
 		.logfd = logfd,
 		.len = len,
+		.skip_wrappers = true,
 	};
 
-	backtrace_full( g_bt_state, 1, Sys_BacktracePrintFull, Sys_BacktracePrintError, &pd );
+	backtrace_full( g_bt_state, 0, Sys_BacktracePrintFull, Sys_BacktracePrintError, &pd );
 
 	return pd.len;
 }

engine/platform/posix/crash_posix.c

@@ -15,65 +15,86 @@ GNU General Public License for more details.
 
 #include "common.h"
 
-// while this is mostly POSIX-compatible functions
-// the contents of ucontext_t is platform-dependent
-// before adding new OS here, check platform.h
-#define _XOPEN_SOURCE 1 // required for ucontext
 #if XASH_FREEBSD || XASH_NETBSD || XASH_OPENBSD || XASH_ANDROID || XASH_LINUX || XASH_APPLE
-#ifndef XASH_OPENBSD
-	#include <ucontext.h>
-#endif
 #include <signal.h>
 #include <sys/mman.h>
+#if XASH_ANDROID
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <android/log.h>
+#endif
 #include "library.h"
 #include "input.h"
 #include "crash.h"
 
+#if XASH_ANDROID
+static char crashlog_path[MAX_OSPATH];
+#endif
+
 static qboolean have_libbacktrace = false;
+static char crash_message[8192];
 
 static void Sys_Crash( int signal, siginfo_t *si, void *context )
 {
-	char message[8192];
-	int len, logfd, i = 0;
-	qboolean detailed_message = false;
-
 	// safe actions first, stack and memory may be corrupted
-	len = Q_snprintf( message, sizeof( message ), "Ver: " XASH_ENGINE_NAME " " XASH_VERSION " (build %i-%s-%s, %s-%s)\n",
+	int len = Q_snprintf( crash_message, sizeof( crash_message ), "Ver: " XASH_ENGINE_NAME " " XASH_VERSION " (build %i-%s-%s, %s-%s)\n",
 		Q_buildnum(), g_buildcommit, g_buildbranch, Q_buildos(), Q_buildarch() );
 
 #if !XASH_FREEBSD && !XASH_NETBSD && !XASH_OPENBSD && !XASH_APPLE
-	len += Q_snprintf( message + len, sizeof( message ) - len, "Crash: signal %d errno %d with code %d at %p %p\n", signal, si->si_errno, si->si_code, si->si_addr, si->si_ptr );
+	len += Q_snprintf( crash_message + len, sizeof( crash_message ) - len, "Crash: signal %d errno %d with code %d at %p %p\n", signal, si->si_errno, si->si_code, si->si_addr, si->si_ptr );
 #else
-	len += Q_snprintf( message + len, sizeof( message ) - len, "Crash: signal %d errno %d with code %d at %p\n", signal, si->si_errno, si->si_code, si->si_addr );
+	len += Q_snprintf( crash_message + len, sizeof( crash_message ) - len, "Crash: signal %d errno %d with code %d at %p\n", signal, si->si_errno, si->si_code, si->si_addr );
 #endif
 
-	write( STDERR_FILENO, message, len );
+	write( STDERR_FILENO, crash_message, len );
+
+#if XASH_ANDROID
+	__android_log_write( ANDROID_LOG_FATAL, "Xash", crash_message );
+#endif
 
 	// now get log fd and write trace directly to log
-	logfd = Sys_LogFileNo();
-	write( logfd, message, len );
+	int logfd = Sys_LogFileNo();
+	if( logfd >= 0 )
+		write( logfd, crash_message, len );
 
 #if HAVE_LIBBACKTRACE
+	qboolean detailed_message = false;
 	if( have_libbacktrace && !detailed_message )
 	{
-		len = Sys_CrashDetailsLibbacktrace( logfd, message, len, sizeof( message ));
+		len = Sys_CrashDetailsLibbacktrace( logfd, crash_message, len, sizeof( crash_message ));
 		detailed_message = true;
 	}
 #endif // HAVE_LIBBACKTRACE
 
+#if XASH_ANDROID
+	// also write to a dedicated crash report file the Java side picks up on next launch
+	if( crashlog_path[0] )
+	{
+		int crashfd = open( crashlog_path, O_WRONLY|O_CREAT|O_TRUNC, 0644 );
+		if( crashfd >= 0 )
+		{
+			write( crashfd, crash_message, len );
+			close( crashfd );
+		}
+	}
+
+	// JNI/SDL calls aren't safe from a signal handler on Android
+	_exit( 128 + signal );
+#else
 #if !XASH_DEDICATED
 	IN_SetMouseGrab( false );
 #endif
 	host.status = HOST_CRASHED;
 
 	// put MessageBox as Sys_Error
-	Platform_MessageBox( "Xash Error", message, false );
+	Platform_MessageBox( "Xash Error", crash_message, false );
 
 	// log saved, now we can try to save configs and close log correctly, it may crash
 	if( host.type == HOST_NORMAL )
 		CL_Crashed();
 
 	Sys_Quit( "crashed" );
+#endif // XASH_ANDROID
 }
 
 static struct sigaction old_segv_act;
@@ -89,6 +110,22 @@ void Sys_SetupCrashHandler( const char *argv0 )
 		.sa_flags = SA_SIGINFO | SA_ONSTACK,
 	};
 
+#if XASH_ANDROID
+	const char *crashdir = getenv( "XASH3D_CRASH_DIR" );
+
+	if( !COM_StringEmptyOrNULL( crashdir ))
+		Q_snprintf( crashlog_path, sizeof( crashlog_path ), "%s/crash.log", crashdir );
+
+	// unblock the engine/SDL_main thread just in case
+	sigset_t set;
+	sigemptyset( &set );
+	sigaddset( &set, SIGSEGV );
+	sigaddset( &set, SIGABRT );
+	sigaddset( &set, SIGBUS );
+	sigaddset( &set, SIGILL );
+	pthread_sigmask( SIG_UNBLOCK, &set, NULL );
+#endif
+
 #if HAVE_LIBBACKTRACE
 	have_libbacktrace = Sys_SetupLibbacktrace( argv0 );
 #endif // HAVE_LIBBACKTRACE
@@ -97,7 +134,6 @@ void Sys_SetupCrashHandler( const char *argv0 )
 	sigaction( SIGABRT, &act, &old_abrt_act );
 	sigaction( SIGBUS,  &act, &old_bus_act );
 	sigaction( SIGILL,  &act, &old_ill_act );
-
 }
 
 void Sys_RestoreCrashHandler( void )

engine/platform/sdl1/s_sdl1.c

@@ -106,7 +106,7 @@ qboolean SNDDMA_Init( void )
 
 	memset( &desired, 0, sizeof( desired ) );
 	desired.freq     = SOUND_DMA_SPEED;
-	desired.format   = AUDIO_S16LSB;
+	desired.format   = AUDIO_S16SYS;
 	desired.samples  = 1024;
 	desired.channels = 2;
 	desired.callback = SDL_SoundCallback;
@@ -119,7 +119,7 @@ qboolean SNDDMA_Init( void )
 		return false;
 	}
 
-	if( obtained.format != AUDIO_S16LSB )
+	if( obtained.format != AUDIO_S16SYS )
 	{
 		Con_Printf( "SDL audio format %d unsupported.\n", obtained.format );
 		goto fail;

engine/platform/sdl2/s_sdl2.c

@@ -123,7 +123,7 @@ qboolean SNDDMA_Init( void )
 
 	memset( &desired, 0, sizeof( desired ) );
 	desired.freq     = SOUND_DMA_SPEED;
-	desired.format   = AUDIO_S16LSB;
+	desired.format   = AUDIO_S16SYS;
 	desired.samples  = 1024;
 	desired.channels = 2;
 	desired.callback = SDL_SoundCallback;
@@ -136,7 +136,7 @@ qboolean SNDDMA_Init( void )
 		return false;
 	}
 
-	if( obtained.format != AUDIO_S16LSB )
+	if( obtained.format != AUDIO_S16SYS )
 	{
 		Con_Printf( "SDL audio format %d unsupported.\n", obtained.format );
 		goto fail;
@@ -277,7 +277,7 @@ qboolean VoiceCapture_Init( void )
 
 	SDL_zero( wanted );
 	wanted.freq = voice.samplerate;
-	wanted.format = AUDIO_S16LSB;
+	wanted.format = AUDIO_S16SYS;
 	wanted.channels = VOICE_PCM_CHANNELS;
 	wanted.samples = voice.frame_size;
 	wanted.callback = SDL_SoundInputCallback;

engine/ref_api.h

@@ -72,7 +72,8 @@ GNU General Public License for more details.
 //     Moved RenderAPI and TriAPI filling to renderer via R_FillRenderAPI and R_FillTriAPI
 //     Moved detail textures parsing and cinematic texture management to engine
 //     Moved creation of default textures to the engine
-#define REF_API_VERSION 15
+// 16. RefGetParm return type changed from int to intptr_t.
+#define REF_API_VERSION 16
 
 #define TF_SKY		(TF_SKYSIDE|TF_NOMIPMAP|TF_ALLOW_NEAREST)
 #define TF_FONT		(TF_NOMIPMAP|TF_CLAMP|TF_ALLOW_NEAREST)
@@ -104,6 +105,7 @@ GNU General Public License for more details.
 #define FWORLD_CUSTOM_SKYBOX BIT( 1 )
 #define FWORLD_WATERALPHA    BIT( 2 )
 #define FWORLD_HAS_DELUXEMAP BIT( 3 )
+#define FWORLD_HAS_LITWATER  BIT( 4 )
 
 // special rendermode for screenfade modulate
 // (probably will be expanded at some point)
@@ -328,7 +330,7 @@ typedef enum
 	PARM_WATER_LEVEL       = -8, // cl.local.water_level
 	PARM_GET_WORLD_PTR     = -9, // world
 	PARM_LOCAL_HEALTH      = -10, // cl.local.health
-	PARM_LOCAL_GAME        = -11,
+	PARM_SINGLEPLAYER_GAME = -11, // was PARM_LOCAL_GAME
 	PARM_NUMENTITIES       = -12, // local game only
 	PARM_GET_MOVEVARS_PTR  = -13, // clgame.movevars
 	PARM_GET_PALETTE_PTR   = -14, // clgame.palette
@@ -342,6 +344,7 @@ typedef enum
 	PARM_GET_LIGHTSTYLES_PTR = -20,
 	PARM_GET_DLIGHTS_PTR = -21,
 	PARM_GET_ELIGHTS_PTR = -22,
+	PARM_GET_STUDIO_HDR = -23, // current m_pStudioHeader in renderer
 
 	// implemented by ref_dll
 
@@ -598,7 +601,7 @@ typedef struct ref_interface_s
 	void (*CL_DrawBeams)( int fTrans , BEAM *beams );
 
 	// Xash3D Render Interface
-	int			(*RefGetParm)( int parm, int arg );	// generic
+	intptr_t		(*RefGetParm)( int parm, int arg );	// generic
 
 	// detail texture scale
 	void	(*R_GetDetailScaleForTexture)( int texture, float *xScale, float *yScale );

engine/server/server.h

@@ -252,6 +252,7 @@ typedef struct sv_client_s
 	double userinfo_penalty;
 
 	double overflow_warn_time;
+	double resourcelist_next_changetime;
 
 	client_frame_t *frames; // updates can be delta'd from here
 	event_state_t  events;  // delta-updated events cycle
@@ -419,6 +420,7 @@ extern convar_t		sv_skyvec_z;
 extern convar_t		sv_consistency;
 extern convar_t		sv_password;
 extern convar_t		sv_uploadmax;
+extern convar_t		sv_upload_penalty_time;
 extern convar_t		sv_trace_messages;
 extern convar_t		sv_enttools_enable;
 extern convar_t		sv_enttools_maxfire;

engine/server/sv_client.c

@@ -836,7 +836,7 @@ static void SV_TestBandWidth( netadr_t from )
 		return;
 	}
 
-	crc = svs.testpacket_crcs[ofs];
+	crc = LittleLong( svs.testpacket_crcs[ofs] );
 	memcpy( svs.testpacket_crcpos, &crc, sizeof( crc ));
 
 	// send the datagram
@@ -1724,7 +1724,7 @@ static qboolean SV_ShouldUpdateUserinfo( sv_client_t *cl )
 	if( FBitSet( cl->flags, FCL_FAKECLIENT ))
 		return allow;
 
-	if( Host_IsLocalGame( ))
+	if( Host_IsSinglePlayerGame( ))
 		return allow;
 
 	// start from 1 second
@@ -2167,7 +2167,7 @@ static qboolean SV_Spawn_f( sv_client_t *cl )
 	if( sv.paused )
 	{
 		MSG_BeginServerCmd( &sv.reliable_datagram, svc_setpause );
-		MSG_WriteByte( &sv.reliable_datagram, sv.paused );
+		MSG_WriteOneBit( &sv.reliable_datagram, sv.paused );
 		SV_ClientPrintf( cl, "Server is paused.\n" );
 	}
 	return true;
@@ -3219,9 +3219,11 @@ void SV_ConnectionlessPacket( netadr_t from, sizebuf_t *msg )
 		return;
 	}
 
-	if( !Q_strcmp( pcmd, A2S_GOLDSRC_INFO ) || pcmd[0] == A2S_GOLDSRC_PLAYERS || pcmd[0] == A2S_GOLDSRC_RULES )
+	// Must check `args` because A2S_GOLDSRC_INFO contains spaces.
+	// `pcmd` points only to the first word from the query string.
+	if( !Q_strcmp( args, A2S_GOLDSRC_INFO ) || pcmd[0] == A2S_GOLDSRC_PLAYERS || pcmd[0] == A2S_GOLDSRC_RULES )
 	{
-		SV_SourceQuery_HandleConnnectionlessPacket( pcmd, from );
+		SV_SourceQuery_HandleConnnectionlessPacket( args, from );
 	}
 	else if( !Q_strcmp( pcmd, A2A_NETINFO ))
 	{
@@ -3465,6 +3467,16 @@ static void SV_ParseResourceList( sv_client_t *cl, sizebuf_t *msg )
 		SV_AddToResourceList( resource, &cl->resourcesneeded );
 	}
 
+	if( host.realtime < cl->resourcelist_next_changetime )
+	{
+		Con_Reportf( "%s: ignoring resource list update from %s: too soon\n", __func__, cl->name );
+		SV_ClearResourceList( &cl->resourcesneeded );
+		SV_ClearResourceList( &cl->resourcesonhand );
+		return;
+	}
+
+	cl->resourcelist_next_changetime = host.realtime + sv_upload_penalty_time.value;
+
 	totalsize = COM_SizeofResourceList( &cl->resourcesneeded, &ri );
 
 	if( totalsize != 0 && sv_allow_upload.value )

engine/server/sv_game.c

@@ -1286,7 +1286,8 @@ static int GAME_EXPORT pfnPrecacheModel( const char *s )
 
 	if( COM_StringEmptyOrNULL( s ))
 	{
-		Host_Error( "%s: NULL pointer or empty string as model name\n", __func__ );
+		// GoldSrc does Host_Error here, we are returning world as that's safe and doesn't break existing Xash games
+		Con_Printf( S_WARN "%s: NULL pointer or empty string as model name, returning world...\n", __func__ );
 		return 0;
 	}
 
@@ -2673,7 +2674,7 @@ static void GAME_EXPORT pfnMessageEnd( void )
 				return;
 			}
 
-			realsize = svgame.msg_realsize;
+			realsize = LittleShort( svgame.msg_realsize );
 			memcpy( &sv.multicast.pData[svgame.msg_size_index], &realsize, sizeof( realsize ));
 		}
 	}
@@ -2706,7 +2707,7 @@ static void GAME_EXPORT pfnMessageEnd( void )
 			return;
 		}
 
-		realsize = svgame.msg_realsize;
+		realsize = LittleShort( svgame.msg_realsize );
 		memcpy( &sv.multicast.pData[svgame.msg_size_index], &realsize, sizeof( realsize ));
 	}
 	else

engine/server/sv_init.c

@@ -833,82 +833,6 @@ static void SV_SetupClients( void )
 	ClearBits( sv_maxclients.flags, FCVAR_CHANGED );
 }
 
-qboolean CRC32_MapFile( dword *crcvalue, const char *filename, qboolean multiplayer )
-{
-	char	headbuf[1024], buffer[1024];
-	int	i, num_bytes, lumplen;
-	int	version, hdr_size;
-	dheader_t	*header;
-	file_t	*f;
-
-	if( !crcvalue ) return false;
-
-	// always calc same checksum for singleplayer
-	if( multiplayer == false )
-	{
-		*crcvalue = (('H'<<24)+('S'<<16)+('A'<<8)+'X');
-		return true;
-	}
-
-	f = FS_Open( filename, "rb", false );
-	if( !f ) return false;
-
-	// read version number
-	FS_Read( f, &version, sizeof( int ));
-	FS_Seek( f, 0, SEEK_SET );
-
-	hdr_size = sizeof( int ) + sizeof( dlump_t ) * HEADER_LUMPS;
-	num_bytes = FS_Read( f, headbuf, hdr_size );
-
-	// corrupted map ?
-	if( num_bytes != hdr_size )
-	{
-		FS_Close( f );
-		return false;
-	}
-
-	header = (dheader_t *)headbuf;
-
-	// invalid version ?
-	switch( header->version )
-	{
-	case Q1BSP_VERSION:
-	case HLBSP_VERSION:
-	case QBSP2_VERSION:
-		break;
-	default:
-		FS_Close( f );
-		return false;
-	}
-
-	CRC32_Init( crcvalue );
-
-	for( i = LUMP_PLANES; i < HEADER_LUMPS; i++ )
-	{
-		lumplen = header->lumps[i].filelen;
-		FS_Seek( f, header->lumps[i].fileofs, SEEK_SET );
-
-		while( lumplen > 0 )
-		{
-			if( lumplen >= sizeof( buffer ))
-				num_bytes = FS_Read( f, buffer, sizeof( buffer ));
-			else num_bytes = FS_Read( f, buffer, lumplen );
-
-			if( num_bytes > 0 )
-			{
-				lumplen -= num_bytes;
-				CRC32_ProcessBuffer( crcvalue, buffer, num_bytes );
-			}
-
-			// file unexpected end ?
-			if( FS_Eof( f )) break;
-		}
-	}
-
-	FS_Close( f );
-
-	return 1;
-}
 
 void SV_FreeTestPacket( void )
 {

engine/server/sv_main.c

@@ -55,6 +55,7 @@ CVAR_DEFINE( sv_allow_upload, "sv_allowupload", "1", FCVAR_SERVER, "allow upload
 CVAR_DEFINE( sv_allow_download, "sv_allowdownload", "1", FCVAR_SERVER, "allow downloading custom resources to the client" );
 static CVAR_DEFINE_AUTO( sv_allow_dlfile, "1", 0, "compatibility cvar, does nothing" );
 CVAR_DEFINE_AUTO( sv_uploadmax, "0.5", FCVAR_SERVER, "max size to upload custom resources (500 kB as default)" );
+CVAR_DEFINE_AUTO( sv_upload_penalty_time, "60", FCVAR_ARCHIVE, "allow custom resource updates only once in this timewindow (set 0 to disable)" );
 CVAR_DEFINE_AUTO( sv_downloadurl, "", FCVAR_PROTECTED, "location from which clients can download missing files" );
 CVAR_DEFINE( sv_consistency, "mp_consistency", "1", FCVAR_SERVER, "enbale consistency check in multiplayer" );
 CVAR_DEFINE_AUTO( mp_logecho, "1", 0, "log multiplayer frags to server logfile" );
@@ -261,7 +262,7 @@ static void SV_CheckCmdTimes( void )
 			Cvar_SetValue( "sv_fps", MAX_FPS_HARD );
 	}
 
-	if( Host_IsLocalGame( ))
+	if( Host_IsSinglePlayerGame( ))
 		return;
 
 	if(( host.realtime - lastreset ) < 1.0 )
@@ -800,7 +801,7 @@ qboolean SV_ProcessUserAgent( netadr_t from, const char *useragent )
 	{
 		char c = id[i];
 
-		if( !isdigit( id[i] ) && !( c >= 'a' && c <= 'f' ))
+		if( !isdigit((byte)id[i] ) && !( c >= 'a' && c <= 'f' ))
 		{
 			SV_RejectConnection( from, "invalid authentication certificate\n" );
 			return false;
@@ -941,6 +942,7 @@ void SV_Init( void )
 	Cvar_RegisterVariable( &sv_send_logos );
 	Cvar_RegisterVariable( &sv_send_resources );
 	Cvar_RegisterVariable( &sv_uploadmax );
+	Cvar_RegisterVariable( &sv_upload_penalty_time );
 	Cvar_RegisterVariable( &sv_version );
 	Cvar_RegisterVariable( &sv_instancedbaseline );
 	Cvar_RegisterVariable( &sv_contact );

engine/server/sv_pmove.c

@@ -331,7 +331,7 @@ static void GAME_EXPORT pfnParticle( const float *origin, int color, float life,
 		return;
 	}
 
-	MSG_WriteByte( &sv.reliable_datagram, svc_particle );
+	MSG_BeginServerCmd( &sv.reliable_datagram, svc_particle );
 	MSG_WriteVec3Coord( &sv.reliable_datagram, origin );
 	MSG_WriteChar( &sv.reliable_datagram, 0 ); // no x-vel
 	MSG_WriteChar( &sv.reliable_datagram, 0 ); // no y-vel

engine/wscript

@@ -186,7 +186,7 @@ def build(bld):
 	# public includes for renderers and utils use
 	bld(name = 'engine_includes', export_includes = '. common common/imagelib', use = 'filesystem_includes')
 
-	libs = ['engine_includes', 'public', 'werror', 'backtrace', 'library_suffix', 'build_vcs']
+	libs = ['engine_includes', 'public', 'werror', 'backtrace_custom', 'library_suffix', 'build_vcs']
 	includes = ['server', 'client', 'client/vgui', 'common/soundlib', 'platform']
 
 	# basic build: dedicated only

filesystem/VFileSystem009.cpp

@@ -12,13 +12,10 @@ but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 GNU General Public License for more details.
 */
-#include <string.h>
-#include <stdio.h>
 #include <time.h>
 #include <stdarg.h>
 #include ALLOCA_H
 #include "crtlib.h"
-#include "filesystem.h"
 #include "filesystem_internal.h"
 #include "VFileSystem009.h"
 #include "common/com_strings.h"
@@ -58,7 +55,7 @@ static inline const char *IdToDir( char *dir, size_t size, const char *id )
 
 	if( !Q_strcmp( id, "GAMEDOWNLOAD" ))
 	{
-		Q_snprintf( dir, size, "%s/" DEFAULT_DOWNLOADED_DIRECTORY , GI->gamefolder );
+		Q_snprintf( dir, size, "%s" DEFAULT_DOWNLOADED_DIRECTORY_SUFFIX, GI->gamefolder );
 		return dir;
 	}
 

filesystem/dir.c

@@ -292,8 +292,6 @@ static inline qboolean FS_AppendToPath( char *dst, size_t *pi, const size_t len,
 
 qboolean FS_FixFileCase( dir_t *dir, const char *path, char *dst, const size_t len, qboolean createpath )
 {
-	const char *prev;
-	const char *next;
 	size_t i = 0;
 
 	if( !FS_AppendToPath( dst, &i, len, dir->name, path, "init" ))
@@ -303,7 +301,19 @@ qboolean FS_FixFileCase( dir_t *dir, const char *path, char *dst, const size_t l
 	if( COM_StringEmpty( path ))
 		return true;
 
-	for( prev = path, next = Q_strchrnul( prev, '/' );
+	// we can't and shouldn't track parent directories to not track the whole filesystem
+	// exit early for this case
+	// FIXME: track the path to catch other cases
+	if( !Q_strncmp( path, "..", 2 ) && ( path[2] == '\0' || path[2] == '/' ))
+	{
+		if( !FS_AppendToPath( dst, &i, len, path, path, "escape to parent directory" ))
+			return false;
+
+		// check file existense
+		return createpath ? true : FS_SysFileOrFolderExists( dst );
+	}
+
+	for( const char *prev = path, *next = Q_strchrnul( prev, '/' );
 		  ;
 		  prev = next + 1, next = Q_strchrnul( prev, '/' ))
 	{

filesystem/filesystem.c

@@ -81,8 +81,9 @@ typedef struct fs_archive_s
 	const char *ext;
 	int type;
 	FS_ADDARCHIVE_FULLPATH pfnAddArchive_Fullpath;
-	qboolean load_wads; // load wads from this archive
-	qboolean real_archive;
+	qboolean load_wads;    // load wads from this archive
+	qboolean real_archive; // not a simulated archive like pk3dir
+	qboolean allow_exec;   // only PAK are allowed to carry executables
 } fs_archive_t;
 
 // add archives in specific order PAK -> PK3 -> WAD
@@ -95,6 +96,7 @@ static const fs_archive_t g_archives[] =
 		.pfnAddArchive_Fullpath = FS_AddPak_Fullpath,
 		.load_wads = true,
 		.real_archive = true,
+		.allow_exec = true,
 	}, {
 		.ext = "pk3",
 		.type = SEARCHPATH_ZIP,
@@ -106,12 +108,10 @@ static const fs_archive_t g_archives[] =
 		.type = SEARCHPATH_PK3DIR,
 		.pfnAddArchive_Fullpath = FS_AddDir_Fullpath,
 		.load_wads = true,
-		.real_archive = false,
 	}, {
 		.ext = "wad",
 		.type = SEARCHPATH_WAD,
 		.pfnAddArchive_Fullpath = FS_AddWad_Fullpath,
-		.load_wads = false,
 		.real_archive = true,
 	},
 };
@@ -121,6 +121,7 @@ static const fs_archive_t g_directory_archive =
 {
 	.type = SEARCHPATH_PLAIN,
 	.pfnAddArchive_Fullpath = FS_AddDir_Fullpath,
+	.allow_exec = true,
 };
 
 #if XASH_ANDROID
@@ -411,6 +412,14 @@ static searchpath_t *FS_AddArchive_Fullpath( const fs_archive_t *archive, const
 			return search; // already loaded
 	}
 
+	// remove exec flag from archives
+	if( !archive->allow_exec )
+		ClearBits( flags, FS_EXEC_PATH );
+
+	// speed up lookups, can't modify archives anyway
+	if( archive->real_archive )
+		SetBits( flags, FS_NOWRITE_PATH );
+
 	search = archive->pfnAddArchive_Fullpath( file, flags );
 
 	if( !search )
@@ -429,6 +438,10 @@ static searchpath_t *FS_AddArchive_Fullpath( const fs_archive_t *archive, const
 		search->pfnSearch( search, &list, "*.wad", true );
 		stringlistsort( &list ); // keep always sorted
 
+		// wad files can't have executables
+		ClearBits( flags, FS_EXEC_PATH );
+		SetBits( flags, FS_NOWRITE_PATH );
+
 		for( i = 0; i < list.numstrings; i++ )
 		{
 			searchpath_t *wad;
@@ -1254,6 +1267,32 @@ static qboolean FS_ParseGameInfo( const char *gamedir, gameinfo_t *GameInfo, qbo
 	return false;
 }
 
+/*
+================
+FS_PathExecFlag
+
+guess if path is executable
+only implemented for Android for now
+================
+*/
+static uint32_t FS_PathExecFlag( const char *dir )
+{
+#if XASH_ANDROID
+	// on Android, where directories usually lie outside of internal app directory
+	// we can't reliably load libraries from
+	//
+	// currently, launcher passes /data/... path as rodir where downloaded game libraries
+	// are stored in. Catch that and mark such path as executable
+	if( !Q_strncmp( dir, "/data/", 6 ))
+		return FS_EXEC_PATH;
+	return 0;
+#else // !XASH_ANDROID
+	// FIXME: read noexec flag on *nix systems?
+	(void)dir;
+	return FS_EXEC_PATH;
+#endif // !XASH_ANDROID
+}
+
 /*
 ================
 FS_AddGameHierarchy
@@ -1261,9 +1300,8 @@ FS_AddGameHierarchy
 */
 void FS_AddGameHierarchy( const char *dir, uint flags )
 {
-	int i;
-	qboolean isGameDir = flags & FS_GAMEDIR_PATH;
-	char buf[MAX_VA_STRING];
+	const qboolean is_game_dir = FBitSet( flags, FS_GAMEDIR_PATH );
+	const uint32_t mount_flags = FBitSet( flags, FS_MOUNT_FLAGS );
 
 	if( COM_StringEmptyOrNULL( dir ))
 		return;
@@ -1274,7 +1312,7 @@ void FS_AddGameHierarchy( const char *dir, uint flags )
 
 	// recursive gamedirs
 	// for example, czeror->czero->cstrike->valve
-	for( i = 0; i < FI.numgames; i++ )
+	for( int i = 0; i < FI.numgames; i++ )
 	{
 		if( !Q_stricmp( FI.games[i]->gamefolder, dir ))
 		{
@@ -1299,55 +1337,67 @@ void FS_AddGameHierarchy( const char *dir, uint flags )
 		}
 	}
 
+	// clear flags not applicable to searchpaths
+	ClearBits( flags, FS_MOUNT_FLAGS );
+
+	char buf[MAX_VA_STRING];
 	if( !COM_StringEmpty( fs_rodir ))
 	{
-		// append new flags to rodir, except FS_GAMEDIR_PATH and FS_CUSTOM_PATH
-		uint new_flags = FS_NOWRITE_PATH | (flags & (~FS_GAMEDIR_PATH|FS_CUSTOM_PATH));
-		if( isGameDir )
-			SetBits( new_flags, FS_GAMERODIR_PATH );
+		uint32_t new_flags = flags
+			| FS_NOWRITE_PATH
+			| ( is_game_dir ? FS_GAMERODIR_PATH : 0 )
+			| FS_PathExecFlag( fs_rodir );
+
+		// clear flags not applicable to read-only directory
+		ClearBits( new_flags, FS_GAMEDIR_PATH | FS_CUSTOM_PATH );
+
+		Q_snprintf( buf, sizeof( buf ), "%s/%s/", fs_rodir, dir );
 
 		FS_AllowDirectPaths( true );
-		Q_snprintf( buf, sizeof( buf ), "%s/%s/", fs_rodir, dir );
 		FS_AddGameDirectory( buf, new_flags );
 		FS_AllowDirectPaths( false );
 	}
 
-	if( isGameDir )
+	if( is_game_dir )
 	{
-		Q_snprintf( buf, sizeof( buf ), "%s/" DEFAULT_DOWNLOADED_DIRECTORY, dir );
-		FS_AddGameDirectory( buf, FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		Q_snprintf( buf, sizeof( buf ), "%s" DEFAULT_DOWNLOADED_DIRECTORY_SUFFIX "/", dir );
+		FS_AddGameDirectory( buf, flags | FS_NOWRITE_PATH | FS_CUSTOM_PATH );
 	}
-	Q_snprintf( buf, sizeof( buf ), "%s/", dir );
-	FS_AddGameDirectory( buf, flags );
 
-	if( FBitSet( flags, FS_MOUNT_HD ))
+	Q_snprintf( buf, sizeof( buf ), "%s/", dir );
+	FS_AddGameDirectory( buf, flags | FS_PathExecFlag( buf ) | FS_PathExecFlag( fs_rootdir ));
+
+	// paths after can only be addon paths
+	SetBits( flags, FS_NOWRITE_PATH | FS_CUSTOM_PATH );
+
+	if( FBitSet( mount_flags, FS_MOUNT_HD ))
 	{
 		Q_snprintf( buf, sizeof( buf ), "%s_hd/", dir );
-		FS_AddGameDirectory( buf, flags|FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_AddGameDirectory( buf, flags );
 	}
 
-	if( FBitSet( flags, FS_MOUNT_ADDON ))
+	if( FBitSet( mount_flags, FS_MOUNT_ADDON ))
 	{
 		Q_snprintf( buf, sizeof( buf ), "%s_addon/", dir );
-		FS_AddGameDirectory( buf, flags|FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_AddGameDirectory( buf, flags );
 	}
 
-	if( FBitSet( flags, FS_MOUNT_LV ))
+	if( FBitSet( mount_flags, FS_MOUNT_LV ))
 	{
 		Q_snprintf( buf, sizeof( buf ), "%s_lv/", dir );
-		FS_AddGameDirectory( buf, flags|FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_AddGameDirectory( buf, flags );
 	}
 
-	if( FBitSet( flags, FS_MOUNT_L10N ) && !COM_StringEmpty( fs_language ) && Q_isalpha( fs_language ))
+	if( FBitSet( mount_flags, FS_MOUNT_L10N ))
 	{
 		Q_snprintf( buf, sizeof( buf ), "%s_%s/", dir, fs_language );
-		FS_AddGameDirectory( buf, flags|FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_AddGameDirectory( buf, flags );
 	}
 
-	if( isGameDir )
+	if( is_game_dir )
 	{
 		Q_snprintf( buf, sizeof( buf ), "%s/" DEFAULT_CUSTOM_DIRECTORY, dir );
-		FS_AddGameDirectory( buf, FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_AddGameDirectory( buf, flags );
 	}
 }
 
@@ -1358,28 +1408,34 @@ FS_Rescan
 */
 void FS_Rescan( uint32_t flags, const char *language )
 {
-	const char *str;
-	Con_Reportf( "%s( %s )\n", __func__, GI->title );
+	Con_Reportf( "%s( %s, 0x%x, %s )\n", __func__, GI->title, flags, language );
 
 	FS_ClearSearchPath();
 
-	flags &= FS_MOUNT_HD|FS_MOUNT_LV|FS_MOUNT_ADDON|FS_MOUNT_L10N;
+	// don't let rescan set searchpath flags
+	flags = FBitSet( flags, FS_MOUNT_FLAGS );
 
-	if( FBitSet( flags, FS_MOUNT_L10N ))
+	if( FBitSet( flags, FS_MOUNT_L10N ) && !COM_StringEmpty( language ) && Q_isalpha( language ))
+	{
 		Q_strncpy( fs_language, language, sizeof( fs_language ));
+	}
 	else
+	{
 		fs_language[0] = 0;
+		ClearBits( flags, FS_MOUNT_L10N );
+	}
 
-	str = getenv( "XASH3D_EXTRAS_PAK1" );
+	const char *str = getenv( "XASH3D_EXTRAS_PAK1" );
 	if( !COM_StringEmptyOrNULL( str ))
-		FS_MountArchive_Fullpath( str, FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_MountArchive_Fullpath( str, FS_NOWRITE_PATH | FS_CUSTOM_PATH );
 
 	str = getenv( "XASH3D_EXTRAS_PAK2" );
 	if( !COM_StringEmptyOrNULL( str ))
-		FS_MountArchive_Fullpath( str, FS_NOWRITE_PATH|FS_CUSTOM_PATH );
+		FS_MountArchive_Fullpath( str, FS_NOWRITE_PATH | FS_CUSTOM_PATH );
 
 	if( Q_stricmp( GI->basedir, GI->gamefolder ))
 		FS_AddGameHierarchy( GI->basedir, flags );
+
 	if( Q_stricmp( GI->basedir, GI->falldir ) && Q_stricmp( GI->gamefolder, GI->falldir ))
 		FS_AddGameHierarchy( GI->falldir, flags );
 
@@ -1453,8 +1509,8 @@ return true if library is crypted
 */
 static qboolean FS_CheckForCrypt( const char *dllname )
 {
-	file_t	*f;
-	int	key;
+	file_t *f;
+	int key;
 
 	// this encryption is specific to DLLs
 	if( Q_stricmp( COM_FileExtension( dllname ), "dll" ))
@@ -1490,103 +1546,6 @@ static int FS_StripIdiotRelativePath( const char *dllname, const char *gamefolde
 	return 0;
 }
 
-/*
-==================
-FS_FindLibrary
-
-search for library, assume index is valid
-==================
-*/
-static qboolean FS_FindLibrary( const char *dllname, qboolean directpath, fs_dllinfo_t *dllInfo )
-{
-	string fixedname;
-	searchpath_t	*search;
-	int index, start = 0, len;
-
-	// check for bad exports
-	if( COM_StringEmptyOrNULL( dllname ))
-		return false;
-
-	FS_AllowDirectPaths( directpath );
-
-	// HACKHACK remove relative path to game folder
-	if( !Q_strnicmp( dllname, "..", 2 ))
-	{
-		// some modders put relative path to themselves???
-		len = FS_StripIdiotRelativePath( dllname, GI->gamefolder );
-
-		if( len == 0 ) // or put relative path to Half-Life game libs
-			len = FS_StripIdiotRelativePath( dllname, "valve" );
-		start += len;
-	}
-
-	Q_strnlwr( &dllname[start], dllInfo->shortPath, sizeof( dllInfo->shortPath )); // always in lower case (why?)
-	COM_FixSlashes( dllInfo->shortPath ); // replace all backward slashes
-	COM_DefaultExtension( dllInfo->shortPath, "."OS_LIB_EXT, sizeof( dllInfo->shortPath ));	// apply ext if forget
-
-	search = FS_FindFile( dllInfo->shortPath, &index, fixedname, sizeof( fixedname ), false );
-
-	if( search )
-	{
-		Q_strncpy( dllInfo->shortPath, fixedname, sizeof( dllInfo->shortPath ));
-	}
-	else if( !directpath )
-	{
-		FS_AllowDirectPaths( false );
-
-		// trying check also 'bin' folder for indirect paths
-		search = FS_FindFile( dllname, &index, fixedname, sizeof( fixedname ), false );
-		if( !search )
-			return false; // unable to find
-
-		Q_strncpy( dllInfo->shortPath, fixedname, sizeof( dllInfo->shortPath ));
-	}
-
-	dllInfo->encrypted = dllInfo->custom_loader = false; // predict state
-
-	if( search && index >= 0 ) // when library is available through VFS
-	{
-		dllInfo->encrypted = FS_CheckForCrypt( dllInfo->shortPath );
-
-		if( search->type == SEARCHPATH_PLAIN ) // is it on the disk? (intentionally omit pk3dir here)
-		{
-			// NOTE: gamedll might resolve it's own path using dladdr() and expects absolute path
-			// NOTE: the only allowed case when searchpath is set by absolute path is the RoDir
-			// rather than figuring out whether path is absolute, just check if it matches
-			if( !COM_StringEmpty( fs_rodir ) && !Q_strnicmp( search->filename, fs_rodir, Q_strlen( fs_rodir )))
-			{
-				Q_snprintf( dllInfo->fullPath, sizeof( dllInfo->fullPath ), "%s%s", search->filename, dllInfo->shortPath );
-			}
-			else
-			{
-				Q_snprintf( dllInfo->fullPath, sizeof( dllInfo->fullPath ), "%s/%s%s", fs_rootdir, search->filename, dllInfo->shortPath );
-			}
-		}
-		else
-		{
-			Q_snprintf( dllInfo->fullPath, sizeof( dllInfo->fullPath ), "%s", dllInfo->shortPath );
-			Con_Printf( "%s%s: loading libraries from archives is %s\n",
-#if XASH_WIN32 && XASH_X86 // a1ba: custom loader is non-portable (I just don't want to touch it)
-				S_WARN, __func__, "non portable and might fail on other platforms"
-#else
-				S_ERROR, __func__, "unsupported on this platform"
-#endif
-			);
-
-			dllInfo->custom_loader = true;
-		}
-	}
-	else
-	{
-		// NOTE: if search is NULL let OS to find the library
-		Q_strncpy( dllInfo->fullPath, dllInfo->shortPath, sizeof( dllInfo->fullPath ));
-	}
-
-	FS_AllowDirectPaths( false ); // always reset direct paths
-
-	return true;
-}
-
 static poolhandle_t Mem_AllocPoolStub( const char *name, const char *filename, int fileline )
 {
 	return (poolhandle_t)0xDEADC0DE;
@@ -1726,9 +1685,10 @@ qboolean FS_InitStdio( qboolean unused_set_to_true, const char *rootdir, const c
 	if( !COM_StringEmpty( fs_rodir ))
 	{
 		Q_snprintf( buf, sizeof( buf ), "%s/", fs_rodir );
-		FS_AddGameDirectory( buf, FS_STATIC_PATH|FS_NOWRITE_PATH );
+		FS_AddGameDirectory( buf, FS_STATIC_PATH | FS_NOWRITE_PATH | FS_PathExecFlag( fs_rodir ));
 	}
-	FS_AddGameDirectory( "./", FS_STATIC_PATH );
+
+	FS_AddGameDirectory( "./", FS_STATIC_PATH | FS_PathExecFlag( fs_rootdir ));
 
 	// but scan rodir for games first
 	if( !COM_StringEmpty( fs_rodir ))
@@ -1841,19 +1801,21 @@ void FS_Path_f( void )
 
 	for( s = fs_searchpaths; s; s = s->next )
 	{
+		string fl;
 		string info;
 
-		s->pfnPrintInfo( s, info, sizeof(info) );
+		s->pfnPrintInfo( s, info, sizeof( info ));
 
-		Con_Printf( "%s", info );
+		fl[0] = 0;
+		Q_strncat( fl, FBitSet( s->flags, FS_GAMERODIR_PATH ) ? "^1R" : "^7-", sizeof( fl ));
+		Q_strncat( fl, FBitSet( s->flags, FS_NOWRITE_PATH )   ? "^7-" : "^2W", sizeof( fl ));
+		Q_strncat( fl, FBitSet( s->flags, FS_EXEC_PATH )      ? "^3X" : "^7-", sizeof( fl ));
+		Q_strncat( fl, FBitSet( s->flags, FS_GAMEDIR_PATH )   ? "^4G" : "^7-", sizeof( fl ));
+		Q_strncat( fl, FBitSet( s->flags, FS_CUSTOM_PATH )    ? "^5C" : "^7-", sizeof( fl ));
+		Q_strncat( fl, FBitSet( s->flags, FS_STATIC_PATH )    ? "^6S" : "^7-", sizeof( fl ));
+		Q_strncat( fl, "^7", sizeof( fl ));
 
-		if( s->flags & FS_GAMERODIR_PATH ) Con_Printf( " ^2rodir^7" );
-		if( s->flags & FS_GAMEDIR_PATH ) Con_Printf( " ^2gamedir^7" );
-		if( s->flags & FS_CUSTOM_PATH ) Con_Printf( " ^2custom^7" );
-		if( s->flags & FS_NOWRITE_PATH ) Con_Printf( " ^2nowrite^7" );
-		if( s->flags & FS_STATIC_PATH ) Con_Printf( " ^2static^7" );
-
-		Con_Printf( "\n" );
+		Con_Printf( "%s\t%s\n", fl, info );
 	}
 }
 
@@ -2177,7 +2139,7 @@ Return the searchpath where the file was found (or NULL)
 and the file index in the package if relevant
 ====================
 */
-searchpath_t *FS_FindFile( const char *name, int *index, char *fixedname, size_t len, qboolean gamedironly )
+static searchpath_t *FS_FindFile( const char *name, int *index, char *fixedname, size_t len, uint32_t flags )
 {
 	searchpath_t	*search;
 
@@ -2186,7 +2148,7 @@ searchpath_t *FS_FindFile( const char *name, int *index, char *fixedname, size_t
 	{
 		int pack_ind;
 
-		if( gamedironly & !FBitSet( search->flags, FS_GAMEDIRONLY_SEARCH_FLAGS ))
+		if( flags && !FBitSet( search->flags, flags ))
 			continue;
 
 		pack_ind = search->pfnFindFile( search, name, fixedname, len );
@@ -2245,6 +2207,103 @@ searchpath_t *FS_FindFile( const char *name, int *index, char *fixedname, size_t
 	return NULL;
 }
 
+/*
+==================
+FS_FindLibrary
+
+search for library, assume index is valid
+==================
+*/
+static qboolean FS_FindLibrary( const char *dllname, qboolean directpath, fs_dllinfo_t *dllInfo )
+{
+	string fixedname;
+	searchpath_t	*search;
+	int index, start = 0, len;
+
+	// check for bad exports
+	if( COM_StringEmptyOrNULL( dllname ))
+		return false;
+
+	FS_AllowDirectPaths( directpath );
+
+	// HACKHACK remove relative path to game folder
+	if( !Q_strnicmp( dllname, "..", 2 ))
+	{
+		// some modders put relative path to themselves???
+		len = FS_StripIdiotRelativePath( dllname, GI->gamefolder );
+
+		if( len == 0 ) // or put relative path to Half-Life game libs
+			len = FS_StripIdiotRelativePath( dllname, "valve" );
+		start += len;
+	}
+
+	Q_strnlwr( &dllname[start], dllInfo->shortPath, sizeof( dllInfo->shortPath )); // always in lower case (why?)
+	COM_FixSlashes( dllInfo->shortPath ); // replace all backward slashes
+	COM_DefaultExtension( dllInfo->shortPath, "."OS_LIB_EXT, sizeof( dllInfo->shortPath ));	// apply ext if forget
+
+	search = FS_FindFile( dllInfo->shortPath, &index, fixedname, sizeof( fixedname ), FS_EXEC_PATH );
+
+	if( search )
+	{
+		Q_strncpy( dllInfo->shortPath, fixedname, sizeof( dllInfo->shortPath ));
+	}
+	else if( !directpath )
+	{
+		FS_AllowDirectPaths( false );
+
+		// trying check also 'bin' folder for indirect paths
+		search = FS_FindFile( dllname, &index, fixedname, sizeof( fixedname ), FS_EXEC_PATH );
+		if( !search )
+			return false; // unable to find
+
+		Q_strncpy( dllInfo->shortPath, fixedname, sizeof( dllInfo->shortPath ));
+	}
+
+	dllInfo->encrypted = dllInfo->custom_loader = false; // predict state
+
+	if( search && index >= 0 ) // when library is available through VFS
+	{
+		dllInfo->encrypted = FS_CheckForCrypt( dllInfo->shortPath );
+
+		if( search->type == SEARCHPATH_PLAIN ) // is it on the disk? (intentionally omit pk3dir here)
+		{
+			// NOTE: gamedll might resolve it's own path using dladdr() and expects absolute path
+			// NOTE: the only allowed case when searchpath is set by absolute path is the RoDir
+			// rather than figuring out whether path is absolute, just check if it matches
+			if( !COM_StringEmpty( fs_rodir ) && !Q_strnicmp( search->filename, fs_rodir, Q_strlen( fs_rodir )))
+			{
+				Q_snprintf( dllInfo->fullPath, sizeof( dllInfo->fullPath ), "%s%s", search->filename, dllInfo->shortPath );
+			}
+			else
+			{
+				Q_snprintf( dllInfo->fullPath, sizeof( dllInfo->fullPath ), "%s/%s%s", fs_rootdir, search->filename, dllInfo->shortPath );
+			}
+		}
+		else
+		{
+			Q_snprintf( dllInfo->fullPath, sizeof( dllInfo->fullPath ), "%s", dllInfo->shortPath );
+			Con_Printf( "%s%s: loading libraries from archives is %s\n",
+#if XASH_WIN32 && XASH_X86 // a1ba: custom loader is non-portable (I just don't want to touch it)
+				S_WARN, __func__, "non portable and might fail on other platforms"
+#else
+				S_ERROR, __func__, "unsupported on this platform"
+#endif
+			);
+
+			dllInfo->custom_loader = true;
+		}
+	}
+	else
+	{
+		// NOTE: if search is NULL let OS to find the library
+		Q_strncpy( dllInfo->fullPath, dllInfo->shortPath, sizeof( dllInfo->fullPath ));
+	}
+
+	FS_AllowDirectPaths( false ); // always reset direct paths
+
+	return true;
+}
+
 /*
 ===========================
 FS_FullPathToRelativePath
@@ -2286,7 +2345,7 @@ file_t *FS_OpenReadFile( const char *filename, const char *mode, qboolean gamedi
 	char netpath[MAX_SYSPATH];
 	int pack_ind;
 
-	search = FS_FindFile( filename, &pack_ind, netpath, sizeof( netpath ), gamedironly );
+	search = FS_FindFile( filename, &pack_ind, netpath, sizeof( netpath ), gamedironly ? FS_GAMEDIRONLY_SEARCH_FLAGS : 0 );
 
 	// not found?
 	if( search == NULL )
@@ -2938,7 +2997,7 @@ static byte *FS_LoadFile_( const char *path, fs_offset_t *filesizeptr, const qbo
 	if( !fs_searchpaths || FS_CheckNastyPath( path ))
 		return NULL;
 
-	search = FS_FindFile( path, &pack_ind, netpath, sizeof( netpath ), gamedironly );
+	search = FS_FindFile( path, &pack_ind, netpath, sizeof( netpath ), gamedironly ? FS_GAMEDIRONLY_SEARCH_FLAGS : 0 );
 
 	if( !search )
 		return NULL;
@@ -3086,7 +3145,7 @@ Look for a file in the packages and in the filesystem
 */
 int GAME_EXPORT FS_FileExists( const char *filename, int gamedironly )
 {
-	return FS_FindFile( filename, NULL, NULL, 0, gamedironly ) != NULL;
+	return FS_FindFile( filename, NULL, NULL, 0, gamedironly ? FS_GAMEDIRONLY_SEARCH_FLAGS : 0 ) != NULL;
 }
 
 /*
@@ -3120,7 +3179,7 @@ qboolean FS_GetFullDiskPath( char *buffer, size_t size, const char *name, qboole
 	searchpath_t *search;
 	char temp[MAX_SYSPATH];
 
-	search = FS_FindFile( name, NULL, temp, sizeof( temp ), gamedironly );
+	search = FS_FindFile( name, NULL, temp, sizeof( temp ), gamedironly ? FS_GAMEDIRONLY_SEARCH_FLAGS : 0 );
 
 	if( search && search->type == SEARCHPATH_PLAIN )
 	{
@@ -3182,8 +3241,9 @@ int FS_FileTime( const char *filename, qboolean gamedironly )
 	char netpath[MAX_SYSPATH];
 	int pack_ind;
 
-	search = FS_FindFile( filename, &pack_ind, netpath, sizeof( netpath ), gamedironly );
-	if( !search ) return -1; // doesn't exist
+	search = FS_FindFile( filename, &pack_ind, netpath, sizeof( netpath ), gamedironly ? FS_GAMEDIRONLY_SEARCH_FLAGS : 0 );
+	if( !search )
+		return -1; // doesn't exist
 
 	return search->pfnFileTime( search, netpath );
 }
@@ -3204,16 +3264,6 @@ qboolean FS_Rename( const char *oldname, const char *newname )
 	if( FS_CheckNastyPath( oldname ) || FS_CheckNastyPath( newname ))
 		return false;
 
-	if( !fs_writepath )
-		return false;
-
-	if( COM_StringEmptyOrNULL( oldname ) || COM_StringEmptyOrNULL( newname ))
-		return false;
-
-	// no work done
-	if( !Q_stricmp( oldname, newname ))
-		return true;
-
 	// fix up slashes
 	Q_strncpy( oldname2, oldname, sizeof( oldname2 ));
 	Q_strncpy( newname2, newname, sizeof( newname2 ));
@@ -3221,6 +3271,14 @@ qboolean FS_Rename( const char *oldname, const char *newname )
 	COM_FixSlashes( oldname2 );
 	COM_FixSlashes( newname2 );
 
+	// no work done
+	if( !Q_stricmp( oldname2, newname2 ))
+		return true;
+
+	// no writing directory is set, no changes should be made
+	if( !fs_writepath )
+		return false;
+
 	// file does not exist
 	if( !FS_FixFileCase( fs_writepath->dir, oldname2, oldpath, sizeof( oldpath ), false ))
 		return false;
@@ -3256,7 +3314,7 @@ qboolean GAME_EXPORT FS_Delete( const char *path )
 	if( FS_CheckNastyPath( path ))
 		return false;
 
-	if( !fs_writepath || COM_StringEmptyOrNULL( path ))
+	if( !fs_writepath )
 		return false;
 
 	Q_strncpy( path2, path, sizeof( path2 ));

filesystem/filesystem.h

@@ -31,8 +31,8 @@ extern "C"
 {
 #endif // __cplusplus
 
-#define FS_API_VERSION 4 // not stable yet!
-#define FS_API_CREATEINTERFACE_TAG   "XashFileSystem004" // follow FS_API_VERSION!!!
+#define FS_API_VERSION 5 // not stable yet!
+#define FS_API_CREATEINTERFACE_TAG   "XashFileSystem005" // follow FS_API_VERSION!!!
 #define FILESYSTEM_INTERFACE_VERSION "VFileSystem009" // never change this!
 
 // search path flags
@@ -43,14 +43,17 @@ enum
 	FS_GAMEDIR_PATH   = BIT( 2 ), // just a marker for gamedir path
 	FS_CUSTOM_PATH    = BIT( 3 ), // gamedir but with custom/mod data
 	FS_GAMERODIR_PATH = BIT( 4 ), // gamedir but read-only
+	FS_EXEC_PATH      = BIT( 5 ), // this directory is allowed to have executable code
 
-	FS_SKIP_ARCHIVED_WADS = BIT( 5 ), // don't mount wads inside archives automatically
-	FS_LOAD_PACKED_WAD = BIT( 6 ), // this wad is packed inside other archive
+	FS_SKIP_ARCHIVED_WADS = BIT( 16 ), // don't mount wads inside archives automatically
+	FS_LOAD_PACKED_WAD    = BIT( 17 ), // this wad is packed inside other archive
 
-	FS_MOUNT_HD    = BIT( 7 ), // mount high definition content folder
-	FS_MOUNT_LV    = BIT( 8 ), // mount low violence content folder
-	FS_MOUNT_ADDON = BIT( 9 ), // mount addon folder
-	FS_MOUNT_L10N  = BIT( 10 ), // mount localization folder
+	FS_MOUNT_HD    = BIT( 24 ), // mount high definition content folder
+	FS_MOUNT_LV    = BIT( 25 ), // mount low violence content folder
+	FS_MOUNT_ADDON = BIT( 26 ), // mount addon folder
+	FS_MOUNT_L10N  = BIT( 27 ), // mount localization folder
+
+	FS_MOUNT_FLAGS = FS_MOUNT_HD | FS_MOUNT_LV | FS_MOUNT_ADDON | FS_MOUNT_L10N,
 
 	FS_GAMEDIRONLY_SEARCH_FLAGS = FS_GAMEDIR_PATH | FS_CUSTOM_PATH | FS_GAMERODIR_PATH
 };

filesystem/filesystem_internal.h

@@ -214,15 +214,14 @@ qboolean FS_Delete( const char *path );
 qboolean FS_SysFileExists( const char *path );
 const char *FS_GetDiskPath( const char *name, qboolean gamedironly );
 qboolean FS_GetFullDiskPath( char *buffer, size_t size, const char *name, qboolean gamedironly );
-void     FS_CreatePath( char *path );
+void FS_CreatePath( char *path );
 qboolean FS_SysFolderExists( const char *path );
 qboolean FS_SysFileOrFolderExists( const char *path );
 file_t  *FS_OpenReadFile( const char *filename, const char *mode, qboolean gamedironly );
 
-int           FS_SysFileTime( const char *filename );
-file_t       *FS_OpenHandle( searchpath_t *search, int handle, fs_offset_t offset, fs_offset_t len );
-file_t       *FS_SysOpen( const char *filepath, const char *mode );
-searchpath_t *FS_FindFile( const char *name, int *index, char *fixedname, size_t len, qboolean gamedironly );
+int FS_SysFileTime( const char *filename );
+file_t *FS_OpenHandle( searchpath_t *search, int handle, fs_offset_t offset, fs_offset_t len );
+file_t *FS_SysOpen( const char *filepath, const char *mode );
 qboolean FS_FullPathToRelativePath( char *dst, const char *src, size_t size );
 
 //

public/atlas.c

@@ -0,0 +1,62 @@
+/*
+atlas.c - generic 2D atlas packer (strip-based)
+Copyright (C) 1997 id Software
+Copyright (C) Xash3D and Xash3D FWGS developers
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+#include "atlas.h"
+
+qboolean Atlas_AllocBlock( atlas_t *atlas, int w, int h, int *x, int *y )
+{
+	int i, j;
+	int best, best2;
+	int size = atlas->size;
+
+	best = size;
+
+	for( i = 0; i <= size - w; )
+	{
+		best2 = 0;
+
+		for( j = 0; j < w; j++ )
+		{
+			if( atlas->allocated[i + j] >= best )
+				break;
+			if( atlas->allocated[i + j] > best2 )
+				best2 = atlas->allocated[i + j];
+		}
+
+		if( j == w )
+		{
+			*x = i;
+			*y = best = best2;
+			if( best == 0 )
+				break;
+			i++;
+		}
+		else
+		{
+			i += j + 1;
+		}
+	}
+
+	if( best + h > size )
+		return false;
+
+	for( i = 0; i < w; i++ )
+		atlas->allocated[*x + i] = best + h;
+
+	if( best + h > atlas->max_height )
+		atlas->max_height = best + h;
+
+	return true;
+}

public/atlas.h

@@ -0,0 +1,41 @@
+/*
+atlas.h - generic 2D atlas packer (strip-based)
+Copyright (C) 1997 id Software
+Copyright (C) Xash3D and Xash3D FWGS developers
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+#ifndef ATLAS_H
+#define ATLAS_H
+
+#include <string.h>
+#include "xash3d_types.h"
+
+// maximum atlas dimension
+#define ATLAS_MAX_SIZE 1024
+
+typedef struct atlas_s
+{
+	int allocated[ATLAS_MAX_SIZE];
+	int size;
+	int max_height;
+} atlas_t;
+
+static inline void Atlas_Init( atlas_t *atlas, int size )
+{
+	memset( atlas->allocated, 0, sizeof( atlas->allocated ));
+	atlas->size = size;
+	atlas->max_height = 0;
+}
+
+qboolean Atlas_AllocBlock( atlas_t *atlas, int w, int h, int *x, int *y );
+
+#endif // ATLAS_H

public/crclib.c

@@ -148,19 +148,19 @@ For proxy protecting
 byte CRC32_BlockSequence( byte *base, int length, int sequence )
 {
 	uint32_t	CRC;
-	char	*ptr;
 	char	buffer[64];
+	int	off;
+	uint32_t	le[2];
 
 	if( sequence < 0 ) sequence = abs( sequence );
-	ptr = (char *)crc32table + (sequence % 0x3FC);
 
 	if( length > 60 ) length = 60;
 	memcpy( buffer, base, length );
 
-	buffer[length+0] = ptr[0];
-	buffer[length+1] = ptr[1];
-	buffer[length+2] = ptr[2];
-	buffer[length+3] = ptr[3];
+	off = sequence % 0x3FC;
+	le[0] = LittleLong( crc32table[off / 4] );
+	le[1] = LittleLong( crc32table[off / 4 + 1] );
+	memcpy( buffer + length, (char *)le + ( off & 3 ), 4 );
 
 	length += 4;
 
@@ -173,6 +173,12 @@ byte CRC32_BlockSequence( byte *base, int length, int sequence )
 
 void MD5Transform( uint buf[4], const uint in[16] );
 
+static void MD5SwapBlock( uint *block, int count )
+{
+	for( int i = 0; i < count; i++ )
+		block[i] = LittleLong( block[i] );
+}
+
 /*
 ===================
 MD5Update
@@ -206,6 +212,7 @@ void MD5Update( MD5Context_t *ctx, const byte *buf, uint len )
 		}
 
 		memcpy( p, buf, t );
+		MD5SwapBlock( ctx->in, 16 );
 		MD5Transform( ctx->buf, ctx->in );
 		buf += t;
 		len -= t;
@@ -215,6 +222,7 @@ void MD5Update( MD5Context_t *ctx, const byte *buf, uint len )
 	while( len >= 64 )
 	{
 		memcpy( ctx->in, buf, 64 );
+		MD5SwapBlock( ctx->in, 16 );
 		MD5Transform( ctx->buf, ctx->in );
 		buf += 64;
 		len -= 64;
@@ -254,6 +262,7 @@ void MD5Final( byte digest[16], MD5Context_t *ctx )
 
 		// two lots of padding: pad the first block to 64 bytes
 		memset( p, 0, count );
+		MD5SwapBlock( ctx->in, 16 );
 		MD5Transform( ctx->buf, ctx->in );
 
 		// now fill the next block with 56 bytes
@@ -265,11 +274,16 @@ void MD5Final( byte digest[16], MD5Context_t *ctx )
 		memset( p, 0, count - 8 );
 	}
 
+	MD5SwapBlock( ctx->in, 14 );
+
 	// append length in bits and transform
 	ctx->in[14] = ctx->bits[0];
 	ctx->in[15] = ctx->bits[1];
 
 	MD5Transform( ctx->buf, ctx->in );
+
+	// output digest in little-endian byte order
+	MD5SwapBlock( ctx->buf, 4 );
 	memcpy( digest, ctx->buf, 16 );
 	memset( ctx, 0, sizeof( *ctx ));	// in case it's sensitive
 }

public/crtlib.c

@@ -929,12 +929,12 @@ void COM_TrimSpace( char *dst, const char *src, size_t size )
 		return;
 
 	// remove spaces from the start
-	for( ; *src && isspace( *src ); src++ );
+	for( ; *src && isspace((byte)*src ); src++ );
 
 	int len = Q_strlen( src );
 
 	// remove spaces from the end
-	for( ; len > 0 && isspace( src[len - 1] ); len-- );
+	for( ; len > 0 && isspace((byte)src[len - 1] ); len-- );
 
 	if( len > 0 )
 	{

public/crtlib.h

@@ -170,9 +170,15 @@ static inline qboolean Q_istype( const char *str, int (*istype)( int c ))
 {
 	if( likely( str && *str ))
 	{
-		while( istype( *str )) str++;
-		if( !*str ) return true;
+		// a1ba: explicitly cast char to unsigned char to not trigger UB
+		// in ctype functions
+		while( istype((byte)*str ))
+			str++;
+
+		if( !*str )
+			return true;
 	}
+
 	return false;
 }
 

public/swaplib.h

@@ -0,0 +1,151 @@
+/*
+swaplib.h - byte-swapping for on-disk structures
+Copyright (C) 2026 Alibek Omarov
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+
+#ifndef SWAPLIB_H
+#define SWAPLIB_H
+
+#include "build.h"
+#include "xash3d_types.h"
+
+typedef struct swap_struct_def_s
+{
+	uint32_t offset;
+	int32_t size;
+	struct swap_struct_def_s *subdef;
+	uint32_t count;
+	uint32_t stride;
+} swap_struct_def_t;
+
+static inline void swap_two_bytes_( byte *a, byte *b )
+{
+	byte tmp = *a;
+	*a = *b;
+	*b = tmp;
+}
+
+static inline void swap_field_( byte *p, int32_t size )
+{
+	switch( size )
+	{
+	case 2:
+		swap_two_bytes_( &p[0], &p[1] );
+		break;
+	case 4:
+		swap_two_bytes_( &p[0], &p[3] );
+		swap_two_bytes_( &p[1], &p[2] );
+		break;
+	case 8:
+		swap_two_bytes_( &p[0], &p[7] );
+		swap_two_bytes_( &p[1], &p[6] );
+		swap_two_bytes_( &p[2], &p[5] );
+		swap_two_bytes_( &p[3], &p[4] );
+		break;
+	default:
+		break;
+	}
+}
+
+// this potentially breaks strict aliasing
+static inline void swap_struct_( const swap_struct_def_t *def, size_t len, byte *data )
+{
+	for( size_t i = 0; i < len; i++ )
+	{
+		if( def[i].size < 0 ) // negative size is reserved to reference other swap defs
+		{
+			uint32_t count = def[i].count ? def[i].count : 1;
+			for( uint32_t j = 0; j < count; j++ )
+				swap_struct_( def[i].subdef, -def[i].size, &data[def[i].offset + j * def[i].stride] );
+			continue;
+		}
+
+		if( def[i].count > 0 ) // go over array of elements
+		{
+			for( uint32_t j = 0; j < def[i].count; j++ )
+				swap_field_( &data[def[i].offset + j * def[i].stride], def[i].size );
+			continue;
+		}
+
+		// process single field
+		swap_field_( &data[def[i].offset], def[i].size );
+	}
+}
+
+static inline void swap_array_( byte *data, int32_t elem_size, uint32_t count )
+{
+	for( uint32_t i = 0; i < count; i++ )
+		swap_field_( &data[i * elem_size], elem_size );
+}
+
+// do not use these macros, they will swap structs unconditionally
+// you might want to use le_/be_ macros instead
+#define swap_struct( swapdef, ptr ) swap_struct_(( swapdef ), sizeof( swapdef ) / sizeof( swapdef[0] ), (byte *)( ptr ))
+#define swap_array( ptr, count ) swap_array_((byte *)( ptr ), sizeof( *( ptr )), ( count ))
+
+#define swap_struct_begin( swapdef ) static swap_struct_def_t swapdef[] = {
+#define swap_struct_end() }
+
+// declare a single field
+#define swap_struct_field( record, field )         { .offset = offsetof( record, field ), .size = sizeof(((record *)0)->field) },
+
+// declare a struct, defined by another swap_struct
+#define swap_struct_child( record, field, child )  { .offset = offsetof( record, field ), .size = -(int32_t)(sizeof( child ) / sizeof( child[0] )), .subdef = child },
+
+// declare an array of fields, doesn't work with flexible array members
+#define swap_struct_array( record, field, cnt )    { .offset = offsetof( record, field ), .size = sizeof(((record *)0)->field[0]), .count = cnt, .stride = sizeof(((record *)0)->field[0]) },
+
+// combined swap_struct_child and swap_struct_array
+#define swap_struct_array_child( record, field, child, cnt ) { .offset = offsetof( record, field ), .size = -(int32_t)(sizeof( child ) / sizeof( child[0] )), .subdef = child, .count = cnt, .stride = sizeof(((record *)0)->field[0]) },
+
+
+// this is done in macros so we can completely avoid defining this
+// in little endian targets
+#if XASH_LITTLE_ENDIAN
+	#define be_struct_begin( x )              swap_struct_begin( x )
+	#define be_struct_field( x, y )           swap_struct_field( x, y )
+	#define be_struct_child( x, y, z )        swap_struct_child( x, y, z )
+	#define be_struct_array( x, y, z )        swap_struct_array( x, y, z )
+	#define be_struct_array_child( x, y, z, w ) swap_struct_array_child( x, y, z, w )
+	#define be_struct_end()                   swap_struct_end()
+	#define be_struct_swap( x, y )            swap_struct( x, y )
+	#define be_array_swap( x, y )             swap_array( x, y )
+	#define le_struct_begin( x )
+	#define le_struct_field( x, y )
+	#define le_struct_child( x, y, z )
+	#define le_struct_array( x, y, z )
+	#define le_struct_array_child( x, y, z, w )
+	#define le_struct_end()                   extern int _le_struct_end_dummy // define as extern variable, to let end() end with ;
+	#define le_struct_swap( x, y )            (void)(y)
+	#define le_array_swap( x, y )             (void)(x)
+#else
+	#define be_struct_begin( x )
+	#define be_struct_field( x, y )
+	#define be_struct_child( x, y, z )
+	#define be_struct_array( x, y, z )
+	#define be_struct_array_child( x, y, z, w )
+	#define be_struct_end()                   extern int _le_struct_end_dummy
+	#define be_struct_swap( x, y )            (void)(y)
+	#define be_array_swap( x, y )             (void)(x)
+	#define le_struct_begin( x )              swap_struct_begin( x )
+	#define le_struct_field( x, y )           swap_struct_field( x, y )
+	#define le_struct_child( x, y, z )        swap_struct_child( x, y, z )
+	#define le_struct_array( x, y, z )        swap_struct_array( x, y, z )
+	#define le_struct_array_child( x, y, z, w ) swap_struct_array_child( x, y, z, w )
+	#define le_struct_end()                   swap_struct_end()
+	#define le_struct_swap( x, y )            swap_struct( x, y )
+	#define le_array_swap( x, y )             swap_array( x, y )
+#endif
+
+
+#endif // SWAPLIB_H

public/tests/test_atlas.c

@@ -0,0 +1,131 @@
+#include "atlas.h"
+
+static int Test_BasicAlloc( void )
+{
+	atlas_t atlas;
+	int x, y;
+
+	Atlas_Init( &atlas, 128 );
+
+	if( !Atlas_AllocBlock( &atlas, 16, 16, &x, &y ))
+		return 1;
+
+	if( x != 0 || y != 0 )
+		return 2;
+
+	if( atlas.max_height != 16 )
+		return 3;
+
+	if( !Atlas_AllocBlock( &atlas, 16, 16, &x, &y ))
+		return 4;
+
+	if( x != 16 || y != 0 )
+		return 5;
+
+	return 0;
+}
+
+static int Test_Full( void )
+{
+	atlas_t atlas;
+	int x, y;
+
+	Atlas_Init( &atlas, 64 );
+
+	if( !Atlas_AllocBlock( &atlas, 64, 64, &x, &y ))
+		return 1;
+
+	if( Atlas_AllocBlock( &atlas, 1, 1, &x, &y ))
+		return 2;
+
+	return 0;
+}
+
+static int Test_Packing( void )
+{
+	atlas_t atlas;
+	int x, y;
+
+	Atlas_Init( &atlas, 64 );
+
+	if( !Atlas_AllocBlock( &atlas, 32, 16, &x, &y ))
+		return 1;
+
+	if( !Atlas_AllocBlock( &atlas, 32, 16, &x, &y ))
+		return 2;
+
+	if( x != 32 || y != 0 )
+		return 3;
+
+	if( !Atlas_AllocBlock( &atlas, 64, 16, &x, &y ))
+		return 4;
+
+	if( y != 16 )
+		return 5;
+
+	return 0;
+}
+
+static int Test_Reset( void )
+{
+	atlas_t atlas;
+	int x, y;
+
+	Atlas_Init( &atlas, 64 );
+
+	if( !Atlas_AllocBlock( &atlas, 64, 64, &x, &y ))
+		return 1;
+
+	Atlas_Init( &atlas, 64 );
+
+	if( !Atlas_AllocBlock( &atlas, 64, 64, &x, &y ))
+		return 2;
+
+	if( x != 0 || y != 0 )
+		return 3;
+
+	return 0;
+}
+
+static int Test_TooLarge( void )
+{
+	atlas_t atlas;
+	int x, y;
+
+	Atlas_Init( &atlas, 64 );
+
+	if( Atlas_AllocBlock( &atlas, 65, 1, &x, &y ))
+		return 1;
+
+	if( Atlas_AllocBlock( &atlas, 1, 65, &x, &y ))
+		return 2;
+
+	return 0;
+}
+
+int main( void )
+{
+	int ret;
+
+	ret = Test_BasicAlloc();
+	if( ret > 0 )
+		return ret;
+
+	ret = Test_Full();
+	if( ret > 0 )
+		return ret + 16;
+
+	ret = Test_Packing();
+	if( ret > 0 )
+		return ret + 32;
+
+	ret = Test_Reset();
+	if( ret > 0 )
+		return ret + 48;
+
+	ret = Test_TooLarge();
+	if( ret > 0 )
+		return ret + 64;
+
+	return 0;
+}