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updated LZ4_DECOMPRESS_INPLACE_MARGIN

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to pass worst case scenario.
Now adds margin proportional to input size to counter local expansion.
This commit is contained in:
Yann Collet 2019-05-30 16:19:30 -07:00
parent 6c69ae6bd6
commit 676d46df27
1 changed files with 2 additions and 2 deletions
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lib/lz4.h
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@ -518,8 +518,8 @@ LZ4LIB_STATIC_API void LZ4_attach_dictionary(LZ4_stream_t* workingStream, const
* so there are ways to reduce memory requirements by playing with them.
*/
#define LZ4_DECOMPRESS_INPLACE_MARGIN 32
#define LZ4_DECOMPRESS_INPLACE_BUFFER_SIZE(decompressedSize) ( (decompressedSize) + LZ4_DECOMPRESS_INPLACE_MARGIN) /**< note: presumes that compressedSize < decompressedSize */
#define LZ4_DECOMPRESS_INPLACE_MARGIN(decompressedSize) (((decompressedSize) >> 8) + 32)
#define LZ4_DECOMPRESS_INPLACE_BUFFER_SIZE(decompressedSize) ( (decompressedSize) + LZ4_DECOMPRESS_INPLACE_MARGIN(decompressedSize)) /**< note: presumes that compressedSize < decompressedSize */
#ifndef LZ4_DISTANCE_MAX /* history window size; can be user-defined at compile time */
# define LZ4_DISTANCE_MAX 65535 /* set to maximum value by default */