From f9ed578bf1f940251496ef8355f25edb667838ba Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Wed, 22 Apr 2026 20:10:35 +0500
Subject: [PATCH] engine: move CRC32_MapFIle to mod_bmodel, as it's a common
 function. Use le_struct_swap

---
 engine/common/mod_bmodel.c | 81 ++++++++++++++++++++++++++++++++++++++
 engine/server/sv_init.c    | 76 -----------------------------------
 2 files changed, 81 insertions(+), 76 deletions(-)

diff --git a/engine/common/mod_bmodel.c b/engine/common/mod_bmodel.c
index 922c91df..8dfaca93 100644
--- a/engine/common/mod_bmodel.c
+++ b/engine/common/mod_bmodel.c
@@ -4067,6 +4067,87 @@ static void Mod_SwapBSPLumps( byte *mod_base, size_t bufferlen )
 	}
 }
 
+/*
+=================
+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
diff --git a/engine/server/sv_init.c b/engine/server/sv_init.c
index dcf1b326..f253ebcf 100644
--- a/engine/server/sv_init.c
+++ b/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 )
 {