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Merge pull request #1332 from facebook/minclevel

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defined a minimum negative level
This commit is contained in:
Yann Collet
2018-09-24 16:01:13 -07:00
committed by GitHub
parent 8d69c303e4 0fc07eb1fd
commit 9bb6c15f79
8 changed files with 87 additions and 61 deletions
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8
programs/zstdcli.c
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@@ -37,8 +37,8 @@
#ifndef ZSTD_NODICT
# include "dibio.h" /* ZDICT_cover_params_t, DiB_trainFromFiles() */
#endif
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_maxCLevel */
#include "zstd.h" /* ZSTD_VERSION_STRING */
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_minCLevel */
#include "zstd.h" /* ZSTD_VERSION_STRING, ZSTD_maxCLevel */
/*-************************************
@@ -629,12 +629,15 @@ int main(int argCount, const char* argv[])
compressionParams.windowLog = ldmWindowLog;
continue;
}
#ifndef ZSTD_NOCOMPRESS /* linking ZSTD_minCLevel() requires compression support */
if (longCommandWArg(&argument, "--fast")) {
/* Parse optional acceleration factor */
if (*argument == '=') {
U32 const maxFast = (U32)-ZSTD_minCLevel();
U32 fastLevel;
++argument;
fastLevel = readU32FromChar(&argument);
if (fastLevel > maxFast) fastLevel = maxFast;
if (fastLevel) {
dictCLevel = cLevel = -(int)fastLevel;
} else {
@@ -648,6 +651,7 @@ int main(int argCount, const char* argv[])
}
continue;
}
#endif
/* fall-through, will trigger bad_usage() later on */
}