bool WINAPI SFileOpenPatchArchive(
HANDLE hMpq,
const TCHAR * szPatchMpqName,
const char * szPatchPathPrefix,
DWORD dwFlags)
{
TMPQArchive * haPatch;
TMPQArchive * ha = (TMPQArchive *)hMpq;
HANDLE hPatchMpq = NULL;
char szPatchPrefixBuff[MPQ_PATCH_PREFIX_LEN];
int nError = ERROR_SUCCESS;
// Keep compiler happy
dwFlags = dwFlags;
// Verify input parameters
if(!IsValidMpqHandle(ha))
nError = ERROR_INVALID_HANDLE;
if(szPatchMpqName == NULL || *szPatchMpqName == 0)
nError = ERROR_INVALID_PARAMETER;
// If the user didn't give the patch prefix, get default one
if(szPatchPathPrefix != NULL)
{
// Save length of the patch prefix
if(strlen(szPatchPathPrefix) > MPQ_PATCH_PREFIX_LEN - 2)
nError = ERROR_INVALID_PARAMETER;
}
//
// We don't allow adding patches to archives that have been open for write
//
// Error scenario:
//
// 1) Open archive for writing
// 2) Modify or replace a file
// 3) Add patch archive to the opened MPQ
// 4) Read patched file
// 5) Now what ?
//
if(nError == ERROR_SUCCESS)
{
if((ha->pStream->StreamFlags & STREAM_FLAG_READ_ONLY) == 0)
nError = ERROR_ACCESS_DENIED;
}
// Open the archive like it is normal archive
if(nError == ERROR_SUCCESS)
{
if(!SFileOpenArchive(szPatchMpqName, 0, MPQ_OPEN_READ_ONLY, &hPatchMpq))
return false;
haPatch = (TMPQArchive *)hPatchMpq;
// Older WoW patches (build 13914) used to have
// several language versions in one patch file
// Those patches needed to have a path prefix
// We can distinguish such patches by not having the (patch_metadata) file
if(szPatchPathPrefix == NULL)
{
if(!SFileHasFile(hPatchMpq, PATCH_METADATA_NAME))
{
GetDefaultPatchPrefix(ha->pStream->szFileName, szPatchPrefixBuff);
szPatchPathPrefix = szPatchPrefixBuff;
}
}
// Save the prefix for patch file names.
// Make sure that there is backslash after it
if(szPatchPathPrefix != NULL && *szPatchPathPrefix != 0)
{
strcpy(haPatch->szPatchPrefix, szPatchPathPrefix);
strcat(haPatch->szPatchPrefix, "\\");
haPatch->cchPatchPrefix = strlen(haPatch->szPatchPrefix);
}
// Now add the patch archive to the list of patches to the original MPQ
while(ha != NULL)
{
if(ha->haPatch == NULL)
{
haPatch->haBase = ha;
ha->haPatch = haPatch;
return true;
}
// Move to the next archive
ha = ha->haPatch;
}
// Should never happen
nError = ERROR_CAN_NOT_COMPLETE;
}
SetLastError(nError);
return false;
}
bool WINAPI SFileOpenPatchArchive(
HANDLE hMpq,
const TCHAR * szPatchMpqName,
const char * szPatchPathPrefix,
DWORD dwFlags)
{
TMPQArchive * haPatch;
TMPQArchive * ha = (TMPQArchive *)hMpq;
HANDLE hPatchMpq = NULL;
size_t nLength = 0;
char szPatchPrefixBuff[MPQ_PATCH_PREFIX_LEN];
int nError = ERROR_SUCCESS;
// Keep compiler happy
dwFlags = dwFlags;
// Verify input parameters
if(!IsValidMpqHandle(ha))
nError = ERROR_INVALID_HANDLE;
if(szPatchMpqName == NULL || *szPatchMpqName == 0)
nError = ERROR_INVALID_PARAMETER;
// If the user didn't give the patch prefix, get default one
if(szPatchPathPrefix == NULL)
{
// Get the default patch prefix from the base MPQ
GetDefaultPatchPrefix(ha->pStream->szFileName, szPatchMpqName, szPatchPrefixBuff);
szPatchPathPrefix = szPatchPrefixBuff;
}
// Save length of the patch prefix
nLength = strlen(szPatchPathPrefix);
if(nLength > MPQ_PATCH_PREFIX_LEN - 2)
nError = ERROR_INVALID_PARAMETER;
//
// We don't allow adding patches to archives that have been open for write
//
// Error scenario:
//
// 1) Open archive for writing
// 2) Modify or replace a file
// 3) Add patch archive to the opened MPQ
// 4) Read patched file
// 5) Now what ?
//
if(nError == ERROR_SUCCESS)
{
if((ha->pStream->StreamFlags & STREAM_FLAG_READ_ONLY) == 0)
nError = ERROR_ACCESS_DENIED;
}
// Open the archive like it is normal archive
if(nError == ERROR_SUCCESS)
{
if(!SFileOpenArchive(szPatchMpqName, 0, MPQ_OPEN_READ_ONLY, &hPatchMpq))
return false;
haPatch = (TMPQArchive *)hPatchMpq;
// Save the prefix for patch file names.
// Make sure that there is backslash after it
if(nLength > 0)
{
strcpy(haPatch->szPatchPrefix, szPatchPathPrefix);
if(haPatch->szPatchPrefix[nLength - 1] != '\\')
{
haPatch->szPatchPrefix[nLength++] = '\\';
haPatch->szPatchPrefix[nLength] = 0;
}
haPatch->cchPatchPrefix = nLength;
}
// Now add the patch archive to the list of patches to the original MPQ
while(ha != NULL)
{
if(ha->haPatch == NULL)
{
haPatch->haBase = ha;
ha->haPatch = haPatch;
return true;
}
// Move to the next archive
ha = ha->haPatch;
}
// Should never happen
nError = ERROR_CAN_NOT_COMPLETE;
}
SetLastError(nError);
return false;
}
