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added ZSTD_createDDict_byReference()

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This commit is contained in:
Yann Collet
2016-12-21 16:44:35 +01:00
parent 8333106b8a
commit 4e5eea61a8
4 changed files with 35 additions and 23 deletions
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lib/compress/zstd_compress.c
+2 -5
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@@ -2736,7 +2736,6 @@ struct ZSTD_CDict_s {
void* dictBuffer;
const void* dictContent;
size_t dictContentSize;
unsigned byReference;
ZSTD_CCtx* refContext;
}; /* typedef'd tp ZSTD_CDict within "zstd.h" */
@@ -2764,14 +2763,12 @@ ZSTD_CDict* ZSTD_createCDict_advanced(const void* dictBuffer, size_t dictSize, u
if ((byReference) || (!dictBuffer) || (!dictSize)) {
cdict->dictBuffer = NULL;
cdict->dictContent = dictBuffer;
cdict->byReference = 1;
} else {
void* const internalBuffer = ZSTD_malloc(dictSize, customMem);
if (!internalBuffer) return NULL;
if (!internalBuffer) { ZSTD_free(cctx, customMem); ZSTD_free(cdict, customMem); return NULL; }
memcpy(internalBuffer, dictBuffer, dictSize);
cdict->dictBuffer = internalBuffer;
cdict->dictContent = internalBuffer;
cdict->byReference = 0;
}
{ size_t const errorCode = ZSTD_compressBegin_advanced(cctx, cdict->dictContent, dictSize, params, 0);
@@ -2809,7 +2806,7 @@ size_t ZSTD_freeCDict(ZSTD_CDict* cdict)
if (cdict==NULL) return 0; /* support free on NULL */
{ ZSTD_customMem const cMem = cdict->refContext->customMem;
ZSTD_freeCCtx(cdict->refContext);
if (!cdict->byReference) ZSTD_free(cdict->dictBuffer, cMem);
ZSTD_free(cdict->dictBuffer, cMem);
ZSTD_free(cdict, cMem);
return 0;
}