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Document the rejection of 256-byte window requests in zlib.h.

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Mark Adler 2016-10-24 16:00:51 -07:00
parent 049578f0a1
commit 77fd7e56bf
1 changed files with 4 additions and 0 deletions
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zlib.h
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@ -563,6 +563,10 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
header crc, and the operating system will be set to 255 (unknown). If a
gzip stream is being written, strm->adler is a crc32 instead of an adler32.
For raw deflate or gzip encoding, a request for a 256-byte window is
rejected as invalid, since only the zlib header provides a means of
transmitting the window size to the decompressor.
The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but is
slow and reduces compression ratio; memLevel=9 uses maximum memory for