mirror of
https://github.com/godotengine/godot.git
synced 2024-11-22 04:06:14 +00:00
e0e1f2e4a2
Upstreams the fix from #73310, so we can remove that patch. Remove `infback.c` which we stopped compiling after #79273. The `OF` macro was also removed so I can drop the patch where I yell at Gentoo developers.
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/* 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
|
|
*/
|
|
|
|
/* @(#) $Id$ */
|
|
|
|
#define ZLIB_INTERNAL
|
|
#include "zlib.h"
|
|
|
|
/* ===========================================================================
|
|
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 ZEXPORT 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 */
|
|
|
|
len = *sourceLen;
|
|
if (*destLen) {
|
|
left = *destLen;
|
|
*destLen = 0;
|
|
}
|
|
else {
|
|
left = 1;
|
|
dest = buf;
|
|
}
|
|
|
|
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;
|
|
|
|
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 ZEXPORT uncompress(Bytef *dest, uLongf *destLen, const Bytef *source,
|
|
uLong sourceLen) {
|
|
return uncompress2(dest, destLen, source, &sourceLen);
|
|
}
|