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ZSTD_initCStream_srcSize() considers "0" to mean "unknown"

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to not break existing programs relying on this behavior.
Might be changed to mean "empty" in the future.
This commit is contained in:
Yann Collet
2017-12-07 17:13:10 -05:00
parent 21f7672d43
commit c029ee1f0b
2 changed files with 4 additions and 5 deletions
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lib/compress/zstd_compress.c
+3 -4
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@@ -2623,12 +2623,11 @@ size_t ZSTD_initCStream_usingDict(ZSTD_CStream* zcs, const void* dict, size_t di
return ZSTD_initCStream_internal(zcs, dict, dictSize, NULL, cctxParams, ZSTD_CONTENTSIZE_UNKNOWN);
}
size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pledgedSrcSize)
size_t ZSTD_initCStream_srcSize(ZSTD_CStream* zcs, int compressionLevel, unsigned long long pss)
{
ZSTD_CCtx_params cctxParams;
U64 const pledgedSrcSize = (pss==0) ? ZSTD_CONTENTSIZE_UNKNOWN : pss; /* temporary : 0 interpreted as "unknown" during transition period. Users willing to specify "unknown" **must** use ZSTD_CONTENTSIZE_UNKNOWN. `0` will be interpreted as "empty" in the future */
ZSTD_parameters const params = ZSTD_getParams(compressionLevel, pledgedSrcSize, 0);
cctxParams = ZSTD_assignParamsToCCtxParams(zcs->requestedParams, params);
cctxParams.fParams.contentSizeFlag = (pledgedSrcSize>0);
ZSTD_CCtx_params const cctxParams = ZSTD_assignParamsToCCtxParams(zcs->requestedParams, params);
return ZSTD_initCStream_internal(zcs, NULL, 0, NULL, cctxParams, pledgedSrcSize);
}