On May 29, 2007, at 8:15 AM, Satyam Sharma wrote:
skipping some checksum calculation if some flag (PRESET_DICT) is absent from the input stream about to be decompressed ...
You don't need to dissect the header manually to look for that bit. If you feed inflate() at least the first two bytes, it will return immediately with the Z_NEED_DICT return code if a preset dictionary is requested. You can force inflate() to return immediately after decoding the two byte header even if a preset dictionary is not requested by using the Z_BLOCK flush code.
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