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65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
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/*****************************************************************************/
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/* SFileExtractFile.cpp Copyright (c) Ladislav Zezula 2003 */
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/*---------------------------------------------------------------------------*/
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/* Simple extracting utility */
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/*---------------------------------------------------------------------------*/
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/* Date Ver Who Comment */
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/* -------- ---- --- ------- */
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/* 20.06.03 1.00 Lad The first version of SFileExtractFile.cpp */
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/*****************************************************************************/
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#define __STORMLIB_SELF__
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#include "StormLib.h"
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#include "StormCommon.h"
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bool WINAPI SFileExtractFile(HANDLE hMpq, const char * szToExtract, const TCHAR * szExtracted, DWORD dwSearchScope)
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{
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TFileStream * pLocalFile = NULL;
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HANDLE hMpqFile = NULL;
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DWORD dwErrCode = ERROR_SUCCESS;
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// Open the MPQ file
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if(dwErrCode == ERROR_SUCCESS)
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{
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if(!SFileOpenFileEx(hMpq, szToExtract, dwSearchScope, &hMpqFile))
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dwErrCode = GetLastError();
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}
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// Create the local file
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if(dwErrCode == ERROR_SUCCESS)
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{
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pLocalFile = FileStream_CreateFile(szExtracted, 0);
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if(pLocalFile == NULL)
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dwErrCode = GetLastError();
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}
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// Copy the file's content
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while(dwErrCode == ERROR_SUCCESS)
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{
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char szBuffer[0x1000];
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DWORD dwTransferred = 0;
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// dwTransferred is only set to nonzero if something has been read.
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// dwErrCode can be ERROR_SUCCESS or ERROR_HANDLE_EOF
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if(!SFileReadFile(hMpqFile, szBuffer, sizeof(szBuffer), &dwTransferred, NULL))
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dwErrCode = GetLastError();
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if(dwErrCode == ERROR_HANDLE_EOF)
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dwErrCode = ERROR_SUCCESS;
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if(dwTransferred == 0)
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break;
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// If something has been actually read, write it
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if(!FileStream_Write(pLocalFile, NULL, szBuffer, dwTransferred))
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dwErrCode = GetLastError();
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}
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// Close the files
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if(hMpqFile != NULL)
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SFileCloseFile(hMpqFile);
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if(pLocalFile != NULL)
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FileStream_Close(pLocalFile);
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if(dwErrCode != ERROR_SUCCESS)
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SetLastError(dwErrCode);
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return (dwErrCode == ERROR_SUCCESS);
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}
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