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Cry3DEngine/File.cpp

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+////////////////////////////////////////////////////////////////////////////
+//
+//  Crytek Engine Source File.
+//  Copyright (C), Crytek Studios, 2002.
+// -------------------------------------------------------------------------
+//  File name:   file.cpp
+//  Version:     v1.00
+//  Created:     28/5/2001 by Vladimir Kajalin
+//  Compilers:   Visual Studio.NET
+//  Description: ceached file access
+// -------------------------------------------------------------------------
+//  History:
+//
+////////////////////////////////////////////////////////////////////////////
+
+
+#include "stdafx.h"
+
+#if defined(LINUX)
+	#include <sys/io.h>
+#else
+	#include <io.h>
+#endif
+
+#ifndef _XBOX
+#ifdef WIN32
+#define WIN32_LEAN_AND_MEAN
+#include "windows.h"
+#endif
+#else
+#include <xtl.h>
+#endif
+
+#include "File.h"
+#include "ICryPak.h"
+
+ICryPak * CXFile::m_pCryPak = 0;
+
+//////////////////////////////////////////////////////////////////////
+CXFile::CXFile(struct ICryPak * pCryPak)
+{
+  m_pCryPak = pCryPak;
+  m_szFileStart=NULL;
+  m_nFileSize=0;
+  m_pCurrPos=0;
+  m_pEndOfFile=NULL;
+  m_sLoadedFileName[0]=0;
+}
+
+//////////////////////////////////////////////////////////////////////
+int CXFile::FRead(void *pDest,int nSize,int nNumElems)
+{
+  int nTotSize=nSize*nNumElems;
+  char *pTest=m_pCurrPos+nTotSize;
+  if (pTest>m_pEndOfFile)
+    return (0);
+
+  memcpy(pDest,m_pCurrPos,nTotSize);
+  m_pCurrPos+=nTotSize;
+  return (nNumElems);
+}
+
+//////////////////////////////////////////////////////////////////////
+int CXFile::FSeek(int nOff,int nFrom)
+{
+  if (nFrom==SEEK_SET)
+  {
+    m_pCurrPos=m_szFileStart+nOff;
+    if (m_pCurrPos>m_pEndOfFile)
+      return (1);
+  }
+
+  return (0);
+}
+
+//////////////////////////////////////////////////////////////////////
+void CXFile::FClose()
+{
+  if (m_szFileStart)
+  {
+    delete [] m_szFileStart;
+    m_szFileStart=NULL;
+  }
+
+  m_pCurrPos=NULL;
+  m_nFileSize=0;
+  m_pEndOfFile=NULL;
+  m_sLoadedFileName[0]=0;
+}
+
+//////////////////////////////////////////////////////////////////////
+int CXFile::FLoad(const char * filename)
+{
+  if(!m_szFileStart || strcmp(m_sLoadedFileName,filename)!=0)
+  {
+    FClose();
+    m_nFileSize=LoadInMemory(filename,(void**)&m_szFileStart);
+    strncpy(m_sLoadedFileName,filename,sizeof(m_sLoadedFileName));
+  }
+
+  m_pCurrPos=m_szFileStart;
+  m_pEndOfFile=m_szFileStart+m_nFileSize;
+  return (m_nFileSize);
+}
+
+//get filename's extension
+//////////////////////////////////////////////////////////////////////
+char *CXFile::GetExtension(const char *filename)
+{
+	char *src = (char *)filename+strlen(filename)-1;
+	while (*src)
+	{
+		if (*src == '.')
+		{ 			
+			return (++src);
+		}
+		src--;
+	}
+
+	return (NULL);
+}
+
+//remove extension from filename
+//////////////////////////////////////////////////////////////////////
+void CXFile::RemoveExtension(char *path)
+{
+	char *src = path+strlen(path)-1;
+	while (*src)
+	{
+		if (*src == '.')
+		{ 
+			*src = 0; // remove extension 
+			return;  
+		}
+		src--;
+	}
+}
+
+//replace filename extension
+//////////////////////////////////////////////////////////////////////
+void CXFile::ReplaceExtension(char *path, const char *new_ext)
+{
+  RemoveExtension(path);
+  strcat(path,".");
+  strcat(path,new_ext);
+}
+
+//check if file exist
+//////////////////////////////////////////////////////////////////////
+bool CXFile::IsFileExist(const char *filename)
+{
+  return FileExist(filename);
+}
+
+//check if file exist
+//////////////////////////////////////////////////////////////////////
+bool CXFile::FileExist(const char *filename)
+{
+  FILE * fp = m_pCryPak->FOpen(filename,"rb");
+	if (!fp) 
+    return (false);
+	m_pCryPak->FClose(fp);
+	return (true);		
+}
+
+//get length of the file 
+//return (-1) if error
+//////////////////////////////////////////////////////////////////////
+int CXFile::GetLength(const char *filename)
+{
+	FILE * fp = m_pCryPak->FOpen(filename,"rb");
+	if (!fp) 
+    return (-1);
+
+	int pos;
+	int end;
+
+	pos = m_pCryPak->FTell(fp);
+	m_pCryPak->FSeek(fp, 0, SEEK_END);
+	end = m_pCryPak->FTell(fp);
+	m_pCryPak->FSeek(fp, pos, SEEK_SET);
+
+	m_pCryPak->FClose(fp);
+	return (end);	
+}
+
+//tell if filename1 is older than masterfile
+//////////////////////////////////////////////////////////////////////
+/*bool CXFile::IsOutOfDate(const char *pFileName1,const char *pMasterFile)
+{
+  
+	FILE * f = m_pCryPak->FOpen(pMasterFile,"rb");
+	if (f)
+		m_pCryPak->FClose(f);
+	else
+		return (false);
+
+	f = m_pCryPak->FOpen(pFileName1,"rb");
+	if (f)
+		m_pCryPak->FClose(f);
+	else
+		return (true);	
+
+#ifdef WIN32
+
+	HANDLE status1 = CreateFile(pFileName1,GENERIC_READ,FILE_SHARE_READ,
+		NULL,OPEN_EXISTING,FILE_FLAG_SEQUENTIAL_SCAN,NULL);
+
+	HANDLE status2 = CreateFile(pMasterFile,GENERIC_READ,FILE_SHARE_READ,
+		NULL,OPEN_EXISTING,FILE_FLAG_SEQUENTIAL_SCAN,NULL);
+
+	FILETIME writetime1,writetime2;
+
+	GetFileTime(status1,NULL,NULL,&writetime1);
+	GetFileTime(status2,NULL,NULL,&writetime2);
+
+  CloseHandle(status1);
+  CloseHandle(status2);
+
+	if (CompareFileTime(&writetime1,&writetime2)==-1)
+		return(true);
+
+	return (false);
+#else
+
+	return (false);
+
+#endif		
+
+}*/
+
+//////////////////////////////////////////////////////////////////////
+/*int CXFile::GetWriteTime(const char *pFileName1)
+{  
+	FILE * f = m_pCryPak->FOpen(pFileName1,"rb");
+	if (f)
+		m_pCryPak->FClose(f);
+	else
+		return (0);
+
+#ifdef WIN32
+
+	HANDLE status1 = CreateFile(pFileName1,GENERIC_READ,FILE_SHARE_READ,
+		NULL,OPEN_EXISTING,FILE_FLAG_SEQUENTIAL_SCAN,NULL);
+
+	FILETIME writetime1;
+  memset(&writetime1,0,sizeof(writetime1));
+
+	GetFileTime(status1,NULL,NULL,&writetime1);
+
+  CloseHandle(status1);
+
+	return (writetime1.dwHighDateTime + writetime1.dwLowDateTime);
+#else
+
+	return (0);
+
+#endif		
+
+}  */
+
+//////////////////////////////////////////////////////////////////////
+int CXFile::GetLength(FILE *f)
+{
+	int pos;
+	int end;
+
+	pos = m_pCryPak->FTell(f);
+	m_pCryPak->FSeek(f, 0, SEEK_END);
+	end = m_pCryPak->FTell(f);
+	m_pCryPak->FSeek(f, pos, SEEK_SET);
+
+	return end;
+}
+
+//////////////////////////////////////////////////////////////////////
+void CXFile::SafeRead(FILE *f, void *buffer, int count)
+{
+	(m_pCryPak->FRead(buffer, 1, count, f) !=  (unsigned)count);
+}
+
+//////////////////////////////////////////////////////////////////////
+int CXFile::LoadInMemory(const char *filename, void **bufferptr)
+{  
+	FILE *f = m_pCryPak->FOpen(filename,"rb");
+  if (!f)
+    return (0);
+  int length = CXFile::GetLength(f);
+	void *buffer = new char[length+1];
+		 
+	SafeRead(f, buffer, length);
+	m_pCryPak->FClose(f);
+
+  char * bbp = (char *)buffer;
+  bbp[length] = 0; //null terminated
+	*bufferptr = buffer;
+	return (length);
+}
+
+//////////////////////////////////////////////////////////////////////
+void CXFile::GetPath(char *path)
+{
+	char *src = path+strlen(path)-1;
+	while (*src)
+	{
+		if (*src == '\\')
+		{ 
+      src++;
+			*src = 0; // remove extension 
+			return;  
+		}
+		src--;
+	}  
+}