public static CacheHeaderStruct Read(Stream stream)
{
StructSerializer <CacheHeaderStruct> minimumStructSerializer = GetStructSerializer(CacheFormatVersion.Two);
stream.Seek(-minimumStructSerializer.ItemSizeOnDisk, SeekOrigin.End);
CacheHeaderStruct minimumStruct = minimumStructSerializer.ReadArray(stream, 1)[0];
StructSerializer <CacheHeaderStruct> actualStructSerializer =
GetStructSerializer(minimumStruct.formatVersion);
if (actualStructSerializer.ItemSizeOnDisk == minimumStructSerializer.ItemSizeOnDisk)
{
return(minimumStruct);
}
stream.Seek(-actualStructSerializer.ItemSizeOnDisk, SeekOrigin.End);
return(actualStructSerializer.ReadArray(stream, 1)[0]);
}
public static CacheFormat FromCacheHeader(CacheHeaderStruct cacheHeader)
{
var formatVersion = cacheHeader.formatVersion;
if (formatVersion >= CacheHeaderStruct.WithStructSizes)
{
return(new CacheFormat()
{
FormatVersion = formatVersion,
CachedFileSize = cacheHeader.cachedFileSize,
ChromGroupHeaderSize = cacheHeader.chromGroupHeaderSize,
ChromPeakSize = cacheHeader.chromPeakSize,
ChromTransitionSize = cacheHeader.chromTransitionSize,
VersionRequired = cacheHeader.versionRequired
});
}
return(FromVersion(formatVersion));
}
