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zlib 0.8

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Mark Adler
2011-09-09 23:03:14 -07:00
parent 913afb9174
commit 4ca984fb44
21 changed files with 185 additions and 352 deletions
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38
zlib.h
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@@ -1,5 +1,5 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
version 0.79 April 28th, 1995.
version 0.8 April 29th, 1995.
Copyright (C) 1995 Jean-loup Gailly and Mark Adler
@@ -28,7 +28,7 @@
#include "zconf.h"
#define ZLIB_VERSION "0.79"
#define ZLIB_VERSION "0.8"
/*
The 'zlib' compression library provides in-memory compression and
@@ -191,25 +191,30 @@ extern int deflate __P((z_stream *strm, int flush));
so should be used only when necessary. Using Z_FULL_FLUSH too often can
seriously degrade the compression.
If the parameter flush is set to Z_FINISH, all pending input is
processed and all pending output is flushed. The next operation on this
stream must be another call of deflate with Z_FINISH but no more input data
(unchanged avail_in) if this call returned with avail_out equal to zero,
or a call of deflateEnd to deallocate the compression state. Z_FINISH can
be used immediately after deflateInit if all the compression is to be
done in a single step. In this case, avail_out must be at least 0.1%
larger than avail_in plus 12 bytes.
If the parameter flush is set to Z_FINISH, all pending input is processed,
all pending output is flushed and deflate returns with Z_STREAM_END if there
was enough output space; if deflate returns with Z_OK, this function must be
called again with Z_FINISH and more output space (updated avail_out) but no
more input data, until it returns with Z_STREAM_END or an error. After
deflate has returned Z_STREAM_END, the only possible operations on the
stream are deflateReset or deflateEnd.
Z_FINISH can be used immediately after deflateInit if all the compression
is to be done in a single step. In this case, avail_out must be at least
0.1% larger than avail_in plus 12 bytes. If deflate does not return
Z_STREAM_END, then it must be called again as described above.
deflate() may update data_type if it can make a good guess about
the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
binary. This field is only for information purposes and does not affect
the compression algorithm in any manner.
deflate() returns Z_OK if some progress has been made (more input processed
or more output produced), Z_STREAM_ERROR if the stream state was
inconsistent (for example if next_in or next_out was NULL), Z_BUF_ERROR if
no progress is possible or if there was not enough room in the output buffer
when Z_FINISH is used. ??? to be changed (use Z_STEAM_END) */
deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible.
*/
extern int deflateEnd __P((z_stream *strm));
@@ -534,7 +539,8 @@ extern int gzflush __P((gzFile file, int flush));
/*
Flushes all pending output into the compressed file. The parameter
flush is as in the deflate() function. The return value is the zlib
error number (see function gzerror below).
error number (see function gzerror below). gzflush returns Z_OK if
the flush parameter is Z_FINISH and all output could be flushed.
gzflush should be called only when strictly necessary because it can
degrade compression.
*/