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added a new --max command

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set parameters to maximum compression
(even more than -22)
This commit is contained in:
Yann Collet
2025-02-09 11:38:44 -08:00
parent 0396480109
commit 630b47a158
1 changed files with 17 additions and 0 deletions
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17
programs/zstdcli.c
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@@ -639,6 +639,22 @@ static unsigned parseCompressionParameters(const char* stringPtr, ZSTD_compressi
return 1; return 1;
} }
static void setMaxCompression(ZSTD_compressionParameters* params)
{
params->windowLog = ZSTD_WINDOWLOG_MAX;
params->chainLog = ZSTD_CHAINLOG_MAX;
params->hashLog = ZSTD_HASHLOG_MAX;
params->searchLog = ZSTD_SEARCHLOG_MAX;
params->minMatch = ZSTD_MINMATCH_MIN;
params->targetLength = ZSTD_TARGETLENGTH_MAX;
params->strategy = ZSTD_STRATEGY_MAX;
g_overlapLog = ZSTD_OVERLAPLOG_MAX;
g_ldmHashLog = ZSTD_LDM_HASHLOG_MAX;
g_ldmHashRateLog = 0; /* automatically derived */
g_ldmMinMatch = 32; /* heuristic */
g_ldmBucketSizeLog = ZSTD_LDM_BUCKETSIZELOG_MAX;
}
static void printVersion(void) static void printVersion(void)
{ {
if (g_displayLevel < DISPLAY_LEVEL_DEFAULT) { if (g_displayLevel < DISPLAY_LEVEL_DEFAULT) {
@@ -957,6 +973,7 @@ int main(int argCount, const char* argv[])
if (!strcmp(argument, "--quiet")) { g_displayLevel--; continue; } if (!strcmp(argument, "--quiet")) { g_displayLevel--; continue; }
if (!strcmp(argument, "--stdout")) { forceStdout=1; outFileName=stdoutmark; continue; } if (!strcmp(argument, "--stdout")) { forceStdout=1; outFileName=stdoutmark; continue; }
if (!strcmp(argument, "--ultra")) { ultra=1; continue; } if (!strcmp(argument, "--ultra")) { ultra=1; continue; }
if (!strcmp(argument, "--max")) { ultra=1; ldmFlag = 1; setMaxCompression(&compressionParams); continue; }
if (!strcmp(argument, "--check")) { FIO_setChecksumFlag(prefs, 2); continue; } if (!strcmp(argument, "--check")) { FIO_setChecksumFlag(prefs, 2); continue; }
if (!strcmp(argument, "--no-check")) { FIO_setChecksumFlag(prefs, 0); continue; } if (!strcmp(argument, "--no-check")) { FIO_setChecksumFlag(prefs, 0); continue; }
if (!strcmp(argument, "--sparse")) { FIO_setSparseWrite(prefs, 2); continue; } if (!strcmp(argument, "--sparse")) { FIO_setSparseWrite(prefs, 2); continue; }