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added ZSTD_setPledgedSrcSize

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This commit is contained in:
inikep 2016-09-21 16:46:35 +02:00
parent 146ef58ff8
commit 230a61fff2
2 changed files with 29 additions and 2 deletions
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21
zlibWrapper/zstd_zlibwrapper.c
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@ -53,6 +53,7 @@ const char * zstdVersion(void) { return ZSTD_VERSION_STRING; }
ZEXTERN const char * ZEXPORT z_zlibVersion OF((void)) { return zlibVersion(); }
static void* ZWRAP_allocFunction(void* opaque, size_t size)
{
z_streamp strm = (z_streamp) opaque;
@ -79,6 +80,7 @@ typedef struct {
z_stream allocFunc; /* copy of zalloc, zfree, opaque */
ZSTD_inBuffer inBuffer;
ZSTD_outBuffer outBuffer;
unsigned long long pledgedSrcSize;
} ZWRAP_CCtx;
@ -110,6 +112,7 @@ ZWRAP_CCtx* ZWRAP_createCCtx(z_streamp strm)
memcpy(&zwc->customMem, &defaultCustomMem, sizeof(ZSTD_customMem));
}
zwc->pledgedSrcSize = 1<<16;
zwc->zbc = ZSTD_createCStream_advanced(zwc->customMem);
if (zwc->zbc == NULL) { ZWRAP_freeCCtx(zwc); return NULL; }
return zwc;
@ -135,6 +138,16 @@ int ZWRAPC_finish_with_error_message(z_streamp strm, char* message)
}
int ZSTD_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize)
{
ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
if (zwc == NULL) return Z_STREAM_ERROR;
zwc->pledgedSrcSize = pledgedSrcSize;
return Z_OK;
}
ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level,
const char *version, int stream_size))
{
@ -151,7 +164,10 @@ ZEXTERN int ZEXPORT z_deflateInit_ OF((z_streamp strm, int level,
if (level == Z_DEFAULT_COMPRESSION)
level = ZWRAP_DEFAULT_CLEVEL;
{ size_t const errorCode = ZSTD_initCStream(zwc->zbc, level);
{ ZSTD_parameters const params = ZSTD_getParams(level, zwc->pledgedSrcSize, 0); /* use the 4th table which is adapted for srcSize <= 16KB */
size_t errorCode;
LOG_WRAPPERC("windowLog=%d chainLog=%d hashLog=%d searchLog=%d searchLength=%d strategy=%d\n", params.cParams.windowLog, params.cParams.chainLog, params.cParams.hashLog, params.cParams.searchLog, params.cParams.searchLength, params.cParams.strategy);
errorCode = ZSTD_initCStream_advanced(zwc->zbc, NULL, 0, params, zwc->pledgedSrcSize /*pledgedSrcSize*/);
if (ZSTD_isError(errorCode)) return ZWRAPC_finish_with_error(zwc, strm, 0); }
zwc->compressionLevel = level;
@ -182,7 +198,8 @@ ZEXTERN int ZEXPORT z_deflateReset OF((z_streamp strm))
{ ZWRAP_CCtx* zwc = (ZWRAP_CCtx*) strm->state;
if (zwc == NULL) return Z_STREAM_ERROR;
{ size_t const errorCode = ZSTD_resetCStream(zwc->zbc, 0);
{ size_t const errorCode = ZSTD_resetCStream(zwc->zbc, zwc->pledgedSrcSize);
printf("zwc->pledgedSrcSize=%d\n", (int)zwc->pledgedSrcSize);
if (ZSTD_isError(errorCode)) return ZWRAPC_finish_with_error(zwc, strm, 0); }
}

10
zlibWrapper/zstd_zlibwrapper.h
View File

@ -26,10 +26,20 @@ extern "C" {
#endif
#endif
/* enables/disables zstd compression during runtime */
void useZSTD(int turn_on);
/* check if zstd compression is turned on */
int isUsingZSTD(void);
/* returns a string with version of zstd library */
const char * zstdVersion(void);
/* Changes a pledged source size for a given stream.
The function should be called after deflateInit().
After this function deflateReset() should be called. */
int ZSTD_setPledgedSrcSize(z_streamp strm, unsigned long long pledgedSrcSize);
#if defined (__cplusplus)
}