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windowscodecs: Implement MetadataReaderInfo_MatchesPattern.

This commit is contained in:
Vincent Povirk 2014-11-12 14:32:29 -06:00 committed by Alexandre Julliard
parent 8891b8f815
commit 499f32b317
1 changed files with 68 additions and 2 deletions
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70
dlls/windowscodecs/info.c
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@ -1794,8 +1794,74 @@ static HRESULT WINAPI MetadataReaderInfo_GetPatterns(IWICMetadataReaderInfo *ifa
static HRESULT WINAPI MetadataReaderInfo_MatchesPattern(IWICMetadataReaderInfo *iface,
REFGUID container, IStream *stream, BOOL *matches)
{
FIXME("(%p,%s,%p,%p): stub\n", iface, debugstr_guid(container), stream, matches);
return E_NOTIMPL;
HRESULT hr;
WICMetadataPattern *patterns;
UINT pattern_count=0, patterns_size=0;
ULONG datasize=0;
BYTE *data=NULL;
ULONG bytesread;
UINT i;
LARGE_INTEGER seekpos;
ULONG pos;
TRACE("(%p,%s,%p,%p)\n", iface, debugstr_guid(container), stream, matches);
hr = MetadataReaderInfo_GetPatterns(iface, container, 0, NULL, &pattern_count, &patterns_size);
if (FAILED(hr)) return hr;
patterns = HeapAlloc(GetProcessHeap(), 0, patterns_size);
if (!patterns) return E_OUTOFMEMORY;
hr = MetadataReaderInfo_GetPatterns(iface, container, patterns_size, patterns, &pattern_count, &patterns_size);
if (FAILED(hr)) goto end;
for (i=0; i<pattern_count; i++)
{
if (datasize < patterns[i].Length)
{
HeapFree(GetProcessHeap(), 0, data);
datasize = patterns[i].Length;
data = HeapAlloc(GetProcessHeap(), 0, patterns[i].Length);
if (!data)
{
hr = E_OUTOFMEMORY;
break;
}
}
seekpos.QuadPart = patterns[i].Position.QuadPart;
hr = IStream_Seek(stream, seekpos, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) break;
hr = IStream_Read(stream, data, patterns[i].Length, &bytesread);
if (hr == S_FALSE || (hr == S_OK && bytesread != patterns[i].Length)) /* past end of stream */
continue;
if (FAILED(hr)) break;
for (pos=0; pos<patterns[i].Length; pos++)
{
if ((data[pos] & patterns[i].Mask[pos]) != patterns[i].Pattern[pos])
break;
}
if (pos == patterns[i].Length) /* matches pattern */
{
hr = S_OK;
*matches = TRUE;
break;
}
}
if (i == pattern_count) /* does not match any pattern */
{
hr = S_OK;
*matches = FALSE;
}
end:
HeapFree(GetProcessHeap(), 0, patterns);
HeapFree(GetProcessHeap(), 0, data);
return hr;
}
static HRESULT WINAPI MetadataReaderInfo_CreateInstance(IWICMetadataReaderInfo *iface,