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zlib 1.2.3.6

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This commit is contained in:
Mark Adler
2011-09-09 23:26:58 -07:00
parent d004b04783
commit dc5a43ebfa
31 changed files with 1056 additions and 2105 deletions
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44
examples/gun.c
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@@ -1,7 +1,7 @@
/* gun.c -- simple gunzip to give an example of the use of inflateBack()
* Copyright (C) 2003, 2005 Mark Adler
* Copyright (C) 2003, 2005, 2008, 2010 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
Version 1.3 12 June 2005 Mark Adler */
Version 1.6 17 January 2010 Mark Adler */
/* Version history:
1.0 16 Feb 2003 First version for testing of inflateBack()
@@ -15,6 +15,9 @@
1.2 20 Mar 2005 Add Unix compress (LZW) decompression
Copy file attributes from input file to output file
1.3 12 Jun 2005 Add casts for error messages [Oberhumer]
1.4 8 Dec 2006 LZW decompression speed improvements
1.5 9 Feb 2008 Avoid warning in latest version of gcc
1.6 17 Jan 2010 Avoid signed/unsigned comparison warnings
*/
/*
@@ -197,14 +200,14 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
int outfile, z_stream *strm)
{
int last; /* last byte read by NEXT(), or -1 if EOF */
int chunk; /* bytes left in current chunk */
unsigned chunk; /* bytes left in current chunk */
int left; /* bits left in rem */
unsigned rem; /* unused bits from input */
int bits; /* current bits per code */
unsigned code; /* code, table traversal index */
unsigned mask; /* mask for current bits codes */
int max; /* maximum bits per code for this stream */
int flags; /* compress flags, then block compress flag */
unsigned flags; /* compress flags, then block compress flag */
unsigned end; /* last valid entry in prefix/suffix tables */
unsigned temp; /* current code */
unsigned prev; /* previous code */
@@ -212,6 +215,7 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
unsigned stack; /* next position for reversed string */
unsigned outcnt; /* bytes in output buffer */
struct outd outd; /* output structure */
unsigned char *p;
/* set up output */
outd.outfile = outfile;
@@ -322,10 +326,12 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
}
/* walk through linked list to generate output in reverse order */
p = match + stack;
while (code >= 256) {
match[stack++] = suffix[code];
*p++ = suffix[code];
code = prefix[code];
}
stack = p - match;
match[stack++] = (unsigned char)code;
final = code;
@@ -349,9 +355,11 @@ local int lunpipe(unsigned have, unsigned char *next, struct ind *indp,
}
outcnt = 0;
}
p = match + stack;
do {
outbuf[outcnt++] = match[--stack];
} while (stack);
outbuf[outcnt++] = *--p;
} while (p > match);
stack = 0;
/* loop for next code with final and prev as the last match, rem and
left provide the first 0..7 bits of the next code, end is the last
@@ -375,7 +383,7 @@ local int gunpipe(z_stream *strm, int infile, int outfile)
{
int ret, first, last;
unsigned have, flags, len;
unsigned char *next;
unsigned char *next = NULL;
struct ind ind, *indp;
struct outd outd;
@@ -471,10 +479,10 @@ local int gunpipe(z_stream *strm, int infile, int outfile)
/* check trailer */
ret = Z_BUF_ERROR;
if (NEXT() != (outd.crc & 0xff) ||
NEXT() != ((outd.crc >> 8) & 0xff) ||
NEXT() != ((outd.crc >> 16) & 0xff) ||
NEXT() != ((outd.crc >> 24) & 0xff)) {
if (NEXT() != (int)(outd.crc & 0xff) ||
NEXT() != (int)((outd.crc >> 8) & 0xff) ||
NEXT() != (int)((outd.crc >> 16) & 0xff) ||
NEXT() != (int)((outd.crc >> 24) & 0xff)) {
/* crc error */
if (last != -1) {
strm->msg = (char *)"incorrect data check";
@@ -482,10 +490,10 @@ local int gunpipe(z_stream *strm, int infile, int outfile)
}
break;
}
if (NEXT() != (outd.total & 0xff) ||
NEXT() != ((outd.total >> 8) & 0xff) ||
NEXT() != ((outd.total >> 16) & 0xff) ||
NEXT() != ((outd.total >> 24) & 0xff)) {
if (NEXT() != (int)(outd.total & 0xff) ||
NEXT() != (int)((outd.total >> 8) & 0xff) ||
NEXT() != (int)((outd.total >> 16) & 0xff) ||
NEXT() != (int)((outd.total >> 24) & 0xff)) {
/* length error */
if (last != -1) {
strm->msg = (char *)"incorrect length check";
@@ -642,8 +650,8 @@ int main(int argc, char **argv)
argv++;
test = 0;
if (argc && strcmp(*argv, "-h") == 0) {
fprintf(stderr, "gun 1.3 (12 Jun 2005)\n");
fprintf(stderr, "Copyright (c) 2005 Mark Adler\n");
fprintf(stderr, "gun 1.6 (17 Jan 2010)\n");
fprintf(stderr, "Copyright (C) 2003-2010 Mark Adler\n");
fprintf(stderr, "usage: gun [-t] [file1.gz [file2.Z ...]]\n");
return 0;
}