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Implemented ZSTD_HEAPMODE for zstd_decompress.c

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Reduce cmake version requirement to 2.8.7
This commit is contained in:
Yann Collet 2016-01-11 12:56:11 +01:00
parent 3e5b73b84b
commit 3a3b72f25a
2 changed files with 13 additions and 5 deletions
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2
contrib/cmake/CMakeLists.txt
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@ -32,7 +32,7 @@
# ################################################################
PROJECT(zstd)
CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)
CMAKE_MINIMUM_REQUIRED(VERSION 2.8.7)
OPTION(ZSTD_LEGACY_SUPPORT "LEGACY SUPPORT" OFF)

16
lib/zstd_decompress.c
View File

@ -35,13 +35,12 @@
*****************************************************************/
/*!
* HEAPMODE :
* Select how default compression functions will allocate memory for their hash table,
* in memory stack (0, fastest), or in memory heap (1, requires malloc())
* Note that compression context is fairly large, as a consequence heap memory is recommended.
* Select how default decompression function ZSTD_decompress() will allocate memory,
* in memory stack (0), or in memory heap (1, requires malloc())
*/
#ifndef ZSTD_HEAPMODE
# define ZSTD_HEAPMODE 1
#endif /* ZSTD_HEAPMODE */
#endif
/*!
* LEGACY_SUPPORT :
@ -790,8 +789,17 @@ size_t ZSTD_decompressDCtx(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const
size_t ZSTD_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
{
#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1)
size_t regenSize;
ZSTD_DCtx* dctx = ZSTD_createDCtx();
if (dctx==NULL) return ERROR(memory_allocation);
regenSize = ZSTD_decompressDCtx(dctx, dst, maxDstSize, src, srcSize);
ZSTD_freeDCtx(dctx);
return regenSize;
#else
ZSTD_DCtx dctx;
return ZSTD_decompressDCtx(&dctx, dst, maxDstSize, src, srcSize);
#endif // defined
}