static bool FindPatchPrefix_SC2(TMPQArchive * haBase, TMPQArchive * haPatch)
{
TFileEntry * pFileTableEnd;
TFileEntry * pFileEntry;
TFileEntry * pBaseEntry;
const char * szPlainName;
char * szLstFileName;
size_t cchWorkBuffer = 0x400;
size_t cchBaseName;
size_t cchDirName;
bool bResult = false;
// Find a *-md5.lst file in the base archive
pBaseEntry = FindMd5ListFile(haBase);
if(pBaseEntry == NULL)
return false;
cchBaseName = strlen(pBaseEntry->szFileName) + 1;
// Allocate working buffer for merging LST file
szLstFileName = STORM_ALLOC(char, cchWorkBuffer);
if(szLstFileName != NULL)
{
// Find that file in the patch MPQ
pFileTableEnd = haPatch->pFileTable + haPatch->dwFileTableSize;
for(pFileEntry = haPatch->pFileTable; pFileEntry < pFileTableEnd; pFileEntry++)
{
// Find the "(patch_metadata)" file within that folder
// Note that the file is always relatively small and contains the patch prefix
// Checking for file size greatly speeds up the search process
if(pFileEntry->szFileName && !(pFileEntry->dwFlags & MPQ_FILE_PATCH_FILE) && (0 < pFileEntry->dwFileSize && pFileEntry->dwFileSize < 0x40))
{
// If the plain file name matches, we need to check its MD5
szPlainName = GetPlainFileName(pFileEntry->szFileName);
cchDirName = (size_t)(szPlainName - pFileEntry->szFileName);
// The file name must not too long and must be PATCH_METADATA_NAME
if((cchDirName + cchBaseName) < cchWorkBuffer && _stricmp(szPlainName, PATCH_METADATA_NAME) == 0)
{
// Construct the name of the eventuall LST file
memcpy(szLstFileName, pFileEntry->szFileName, cchDirName);
memcpy(szLstFileName + cchDirName, pBaseEntry->szFileName, cchBaseName);
// If there is the "*-md5.lst" file in that directory, we check its MD5
if(IsMatchingPatchFile(haPatch, szLstFileName, pBaseEntry->md5))
{
bResult = CreatePatchPrefix(haPatch, pFileEntry->szFileName, szPlainName);
break;
}
}
}
}
// Free the work buffer
STORM_FREE(szLstFileName);
}
return bResult;
}
static bool FindPatchPrefix_SC2(TMPQArchive * haBase, TMPQArchive * haPatch)
{
TMPQNamePrefix * pPatchPrefix;
TFileEntry * pBaseEntry;
char * szLstFileName;
char * szPlainName;
size_t cchWorkBuffer = 0x400;
bool bResult = false;
// First-level patches: Find the same file within the patch archive
// and verify by MD5-before-patch
if(haBase->haPatch == NULL)
{
TFileEntry * pFileTableEnd = haPatch->pFileTable + haPatch->dwFileTableSize;
TFileEntry * pFileEntry;
// Allocate working buffer for merging LST file
szLstFileName = STORM_ALLOC(char, cchWorkBuffer);
if(szLstFileName != NULL)
{
// Find a *-md5.lst file in the base archive
pBaseEntry = FindBaseLstFile(haBase);
if(pBaseEntry == NULL)
{
STORM_FREE(szLstFileName);
return false;
}
// Parse the entire file table
for(pFileEntry = haPatch->pFileTable; pFileEntry < pFileTableEnd; pFileEntry++)
{
// Look for "patch_metadata" file
if(IsPatchMetadataFile(pFileEntry))
{
// Construct the name of the MD5 file
strcpy(szLstFileName, pFileEntry->szFileName);
szPlainName = (char *)GetPlainFileName(szLstFileName);
strcpy(szPlainName, pBaseEntry->szFileName);
// Check for matching MD5 file
if(IsMatchingPatchFile(haPatch, szLstFileName, pBaseEntry->md5))
{
bResult = CreatePatchPrefix(haPatch, szLstFileName, (size_t)(szPlainName - szLstFileName));
break;
}
}
}
// Delete the merge buffer
STORM_FREE(szLstFileName);
}
}
