Function SFileOpenArchive

3rdParty/StormLib/src/SFileOpenArchive.cpp:149–468

//   phMpq      - Pointer to store open archive handle

bool STORMAPI SFileOpenArchive(
    const TCHAR * szMpqName,
    DWORD dwPriority,
    DWORD dwFlags,
    HANDLE * phMpq)
{
    TMPQUserData * pUserData;
    TFileStream * pStream = NULL;       // Open file stream
    TMPQArchive * ha = NULL;            // Archive handle
    TFileEntry * pFileEntry;
    ULONGLONG FileSize = 0;             // Size of the file
    LPBYTE pbHeaderBuffer = NULL;       // Buffer for searching MPQ header
    DWORD dwStreamFlags = (dwFlags & STREAM_FLAGS_MASK);
    bool bIsWarcraft3Map = false;
    int nError = ERROR_SUCCESS;

    // Verify the parameters
    if(szMpqName == NULL || *szMpqName == 0 || phMpq == NULL)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
        return false;
    }

    // One time initialization of MPQ cryptography
    InitializeMpqCryptography();
    dwPriority = dwPriority;

    // If not forcing MPQ v 1.0, also use file bitmap
    dwStreamFlags |= (dwFlags & MPQ_OPEN_FORCE_MPQ_V1) ? 0 : STREAM_FLAG_USE_BITMAP;

#ifndef FULL
    char translatedName[260];
    TranslateFileName(translatedName, sizeof(translatedName), szMpqName);
#endif

    // Open the MPQ archive file
    pStream = FileStream_OpenFile(translatedName, dwStreamFlags);
    if(pStream == NULL)
        return false;

    // Check the file size. There must be at least 0x20 bytes
    if(nError == ERROR_SUCCESS)
    {
        FileStream_GetSize(pStream, &FileSize);
        if(FileSize < MPQ_HEADER_SIZE_V1)
            nError = ERROR_BAD_FORMAT;
    }

    // Allocate the MPQhandle
    if(nError == ERROR_SUCCESS)
    {
        if((ha = STORM_ALLOC(TMPQArchive, 1)) == NULL)
            nError = ERROR_NOT_ENOUGH_MEMORY;
    }

    // Allocate buffer for searching MPQ header
    if(nError == ERROR_SUCCESS)
    {