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new command -M#, to limit memory usage during decompression (#403)

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This commit is contained in:
Yann Collet
2016-10-14 13:32:20 -07:00
parent 5d919e7ac3
commit d4cda27b63
6 changed files with 29 additions and 13 deletions
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lib/decompress/zstd_decompress.c
+2 -2
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@@ -1573,7 +1573,7 @@ size_t ZSTD_setDStreamParameter(ZSTD_DStream* zds,
switch(paramType)
{
default : return ERROR(parameter_unknown);
case ZSTDdsp_maxWindowSize : zds->maxWindowSize = paramValue; break;
case ZSTDdsp_maxWindowSize : zds->maxWindowSize = paramValue ? paramValue : (U32)(-1); break;
}
return 0;
}
@@ -1654,7 +1654,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inB
} }
zds->fParams.windowSize = MAX(zds->fParams.windowSize, 1U << ZSTD_WINDOWLOG_ABSOLUTEMIN);
if (zds->fParams.windowSize > zds->maxWindowSize) return ERROR(frameParameter_unsupported);
if (zds->fParams.windowSize > zds->maxWindowSize) return ERROR(frameParameter_windowTooLarge);
/* Adapt buffer sizes to frame header instructions */
{ size_t const blockSize = MIN(zds->fParams.windowSize, ZSTD_BLOCKSIZE_ABSOLUTEMAX);