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Update a few remaining zlib source files

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Justine Tunney 2022-10-03 19:18:34 -07:00
parent 32321ab1e9
commit 01bd7d1008
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23 changed files with 1276 additions and 778 deletions
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154
third_party/zlib/uncompr.c vendored
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@ -1,91 +1,103 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 1995-2003,2010,2014,2016 Jean-loup Gailly and Mark Adler │
│ Use of this source code is governed by the BSD-style licenses that can │
│ be found in the third_party/zlib/LICENSE file. │
╚─────────────────────────────────────────────────────────────────────────────*/
/* uncompr.c -- decompress a memory buffer
* Copyright (C) 1995-2003, 2010, 2014, 2016 Jean-loup Gailly, Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#define ZLIB_INTERNAL
#include "third_party/zlib/internal.h"
#include "third_party/zlib/macros.internal.h"
#include "third_party/zlib/zlib.h"
asm(".ident\t\"\\n\\n\
zlib (zlib License)\\n\
Copyright 1995-2017 Jean-loup Gailly and Mark Adler\"");
asm(".include \"libc/disclaimer.inc\"");
// clang-format off
/**
* Decompresses the source buffer into the destination buffer. *sourceLen is
* the byte length of the source buffer. Upon entry, *destLen is the total size
* of the destination buffer, which must be large enough to hold the entire
* uncompressed data. (The size of the uncompressed data must have been saved
* previously by the compressor and transmitted to the decompressor by some
* mechanism outside the scope of this compression library.) Upon exit,
* *destLen is the size of the decompressed data and *sourceLen is the number
* of source bytes consumed. Upon return, source + *sourceLen points to the
* first unused input byte.
*
* uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough
* memory, Z_BUF_ERROR if there was not enough room in the output buffer, or
* Z_DATA_ERROR if the input data was corrupted, including if the input data is
* an incomplete zlib stream.
*/
int uncompress2(Bytef *dest, uLongf *destLen, const Bytef *source,
uLong *sourceLen) {
z_stream stream;
int err;
const uInt max = (uInt)-1;
uLong len, left;
Byte buf[1]; /* for detection of incomplete stream when *destLen == 0 */
/* @(#) $Id$ */
len = *sourceLen;
if (*destLen) {
left = *destLen;
*destLen = 0;
} else {
left = 1;
dest = buf;
}
/* ===========================================================================
Decompresses the source buffer into the destination buffer. *sourceLen is
the byte length of the source buffer. Upon entry, *destLen is the total size
of the destination buffer, which must be large enough to hold the entire
uncompressed data. (The size of the uncompressed data must have been saved
previously by the compressor and transmitted to the decompressor by some
mechanism outside the scope of this compression library.) Upon exit,
*destLen is the size of the decompressed data and *sourceLen is the number
of source bytes consumed. Upon return, source + *sourceLen points to the
first unused input byte.
stream.next_in = (const Bytef *)source;
stream.avail_in = 0;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
stream.opaque = (voidpf)0;
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer, or
Z_DATA_ERROR if the input data was corrupted, including if the input data is
an incomplete zlib stream.
*/
int ZEXPORT uncompress2 (dest, destLen, source, sourceLen)
Bytef *dest;
uLongf *destLen;
const Bytef *source;
uLong *sourceLen;
{
z_stream stream;
int err;
const uInt max = (uInt)-1;
uLong len, left;
Byte buf[1]; /* for detection of incomplete stream when *destLen == 0 */
err = inflateInit(&stream);
if (err != Z_OK) return err;
stream.next_out = dest;
stream.avail_out = 0;
do {
if (stream.avail_out == 0) {
stream.avail_out = left > (uLong)max ? max : (uInt)left;
left -= stream.avail_out;
len = *sourceLen;
if (*destLen) {
left = *destLen;
*destLen = 0;
}
if (stream.avail_in == 0) {
stream.avail_in = len > (uLong)max ? max : (uInt)len;
len -= stream.avail_in;
else {
left = 1;
dest = buf;
}
err = inflate(&stream, Z_NO_FLUSH);
} while (err == Z_OK);
*sourceLen -= len + stream.avail_in;
if (dest != buf)
*destLen = stream.total_out;
else if (stream.total_out && err == Z_BUF_ERROR)
left = 1;
stream.next_in = (z_const Bytef *)source;
stream.avail_in = 0;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
stream.opaque = (voidpf)0;
inflateEnd(&stream);
return err == Z_STREAM_END
? Z_OK
: err == Z_NEED_DICT
? Z_DATA_ERROR
: err == Z_BUF_ERROR && left + stream.avail_out
? Z_DATA_ERROR
: err;
err = inflateInit(&stream);
if (err != Z_OK) return err;
stream.next_out = dest;
stream.avail_out = 0;
do {
if (stream.avail_out == 0) {
stream.avail_out = left > (uLong)max ? max : (uInt)left;
left -= stream.avail_out;
}
if (stream.avail_in == 0) {
stream.avail_in = len > (uLong)max ? max : (uInt)len;
len -= stream.avail_in;
}
err = inflate(&stream, Z_NO_FLUSH);
} while (err == Z_OK);
*sourceLen -= len + stream.avail_in;
if (dest != buf)
*destLen = stream.total_out;
else if (stream.total_out && err == Z_BUF_ERROR)
left = 1;
inflateEnd(&stream);
return err == Z_STREAM_END ? Z_OK :
err == Z_NEED_DICT ? Z_DATA_ERROR :
err == Z_BUF_ERROR && left + stream.avail_out ? Z_DATA_ERROR :
err;
}
int uncompress(Bytef *dest, uLongf *destLen, const Bytef *source,
uLong sourceLen) {
return uncompress2(dest, destLen, source, &sourceLen);
int ZEXPORT uncompress (dest, destLen, source, sourceLen)
Bytef *dest;
uLongf *destLen;
const Bytef *source;
uLong sourceLen;
{
return uncompress2(dest, destLen, source, &sourceLen);
}