From: Mark Adler <madler@alumni.caltech.edu>
Date: Mon, 24 Oct 2016 23:00:51 +0000 (-0700)
Subject: Document the rejection of 256-byte window requests in zlib.h.
X-Git-Tag: 1.9.9-b1~733
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=647564776f309556cde879da67b885bf9099804c;p=thirdparty%2Fzlib-ng.git

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

diff --git a/zlib.h b/zlib.h
index f2c82a403..48187e9ca 100644
--- a/zlib.h
+++ b/zlib.h
@@ -560,6 +560,10 @@ ZEXTERN int ZEXPORT deflateInit2 (z_stream *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