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Update ZLib-Intel to v1.2.11 (dotnet#32732)
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Original file line number | Diff line number | Diff line change |
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/* compress.c -- compress a memory buffer | ||
* Copyright (C) 1995-2005, 2014, 2016 Jean-loup Gailly, Mark Adler | ||
* For conditions of distribution and use, see copyright notice in zlib.h | ||
*/ | ||
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/* @(#) $Id$ */ | ||
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#define ZLIB_INTERNAL | ||
#include "zlib.h" | ||
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/* =========================================================================== | ||
Compresses the source buffer into the destination buffer. The level | ||
parameter has the same meaning as in deflateInit. sourceLen is the byte | ||
length of the source buffer. Upon entry, destLen is the total size of the | ||
destination buffer, which must be at least 0.1% larger than sourceLen plus | ||
12 bytes. Upon exit, destLen is the actual size of the compressed buffer. | ||
compress2 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, | ||
Z_STREAM_ERROR if the level parameter is invalid. | ||
*/ | ||
int ZEXPORT compress2 (dest, destLen, source, sourceLen, level) | ||
Bytef *dest; | ||
uLongf *destLen; | ||
const Bytef *source; | ||
uLong sourceLen; | ||
int level; | ||
{ | ||
z_stream stream; | ||
int err; | ||
const uInt max = (uInt)-1; | ||
uLong left; | ||
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left = *destLen; | ||
*destLen = 0; | ||
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stream.zalloc = (alloc_func)0; | ||
stream.zfree = (free_func)0; | ||
stream.opaque = (voidpf)0; | ||
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err = deflateInit(&stream, level); | ||
if (err != Z_OK) return err; | ||
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stream.next_out = dest; | ||
stream.avail_out = 0; | ||
stream.next_in = (z_const Bytef *)source; | ||
stream.avail_in = 0; | ||
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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 = sourceLen > (uLong)max ? max : (uInt)sourceLen; | ||
sourceLen -= stream.avail_in; | ||
} | ||
err = deflate(&stream, sourceLen ? Z_NO_FLUSH : Z_FINISH); | ||
} while (err == Z_OK); | ||
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*destLen = stream.total_out; | ||
deflateEnd(&stream); | ||
return err == Z_STREAM_END ? Z_OK : err; | ||
} | ||
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/* =========================================================================== | ||
*/ | ||
int ZEXPORT compress (dest, destLen, source, sourceLen) | ||
Bytef *dest; | ||
uLongf *destLen; | ||
const Bytef *source; | ||
uLong sourceLen; | ||
{ | ||
return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION); | ||
} | ||
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/* =========================================================================== | ||
If the default memLevel or windowBits for deflateInit() is changed, then | ||
this function needs to be updated. | ||
*/ | ||
uLong ZEXPORT compressBound (sourceLen) | ||
uLong sourceLen; | ||
{ | ||
return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + | ||
(sourceLen >> 25) + 13; | ||
} |
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