lz4_helpers.c File Reference

#include "fuzz_helpers.h"
#include "lz4_helpers.h"
#include "lz4hc.h"

Go to the source code of this file.

Functions
LZ4F_frameInfo_t	FUZZ_randomFrameInfo (uint32_t *seed)
LZ4F_preferences_t	FUZZ_randomPreferences (uint32_t *seed)
size_t	FUZZ_decompressFrame (void *dst, const size_t dstCapacity, const void *src, const size_t srcSize)

Function Documentation

FUZZ_decompressFrame()

size_t FUZZ_decompressFrame	(	void *	dst,
		const size_t	dstCapacity,
		const void *	src,
		const size_t	srcSize
	)

Definition at line 30 of file lz4_helpers.c.

{
    LZ4F_decompressOptions_t opts;
    memset(&opts, 0, sizeof(opts));
    opts.stableDst = 1;
    LZ4F_dctx* dctx;
    LZ4F_createDecompressionContext(&dctx, LZ4F_VERSION);
    FUZZ_ASSERT(dctx);
 
    size_t dstSize = dstCapacity;
    size_t srcConsumed = srcSize;
    size_t const rc =
            LZ4F_decompress(dctx, dst, &dstSize, src, &srcConsumed, &opts);
    FUZZ_ASSERT(!LZ4F_isError(rc));
    FUZZ_ASSERT(rc == 0);
    FUZZ_ASSERT(srcConsumed == srcSize);
 
    LZ4F_freeDecompressionContext(dctx);
 
    return dstSize;
}

References dst, FUZZ_ASSERT, LZ4F_createDecompressionContext(), LZ4F_decompress(), LZ4F_freeDecompressionContext(), LZ4F_isError(), LZ4F_VERSION, memset(), src, srcSize, and LZ4F_decompressOptions_t::stableDst.

Referenced by LLVMFuzzerTestOneInput().

FUZZ_randomFrameInfo()

LZ4F_frameInfo_t FUZZ_randomFrameInfo

(

uint32_t *

seed

)

Definition at line 5 of file lz4_helpers.c.

{
    LZ4F_frameInfo_t info = LZ4F_INIT_FRAMEINFO;
    info.blockSizeID = FUZZ_rand32(seed, LZ4F_max64KB - 1, LZ4F_max4MB);
    if (info.blockSizeID < LZ4F_max64KB) {
        info.blockSizeID = LZ4F_default;
    }
    info.blockMode = FUZZ_rand32(seed, LZ4F_blockLinked, LZ4F_blockIndependent);
    info.contentChecksumFlag = FUZZ_rand32(seed, LZ4F_noContentChecksum,
                                           LZ4F_contentChecksumEnabled);
    info.blockChecksumFlag = FUZZ_rand32(seed, LZ4F_noBlockChecksum,
                                         LZ4F_blockChecksumEnabled);
    return info;
}

References FUZZ_rand32(), info(), LZ4F_blockChecksumEnabled, LZ4F_blockIndependent, LZ4F_blockLinked, LZ4F_contentChecksumEnabled, LZ4F_default, LZ4F_INIT_FRAMEINFO, LZ4F_max4MB, LZ4F_max64KB, LZ4F_noBlockChecksum, and LZ4F_noContentChecksum.

Referenced by FUZZ_randomPreferences().

FUZZ_randomPreferences()

LZ4F_preferences_t FUZZ_randomPreferences

(

uint32_t *

seed

)

Definition at line 20 of file lz4_helpers.c.

{
    LZ4F_preferences_t prefs = LZ4F_INIT_PREFERENCES;
    prefs.frameInfo = FUZZ_randomFrameInfo(seed);
    prefs.compressionLevel = FUZZ_rand32(seed, 0, LZ4HC_CLEVEL_MAX + 3) - 3;
    prefs.autoFlush = FUZZ_rand32(seed, 0, 1);
    prefs.favorDecSpeed = FUZZ_rand32(seed, 0, 1);
    return prefs;
}

References LZ4F_preferences_t::autoFlush, LZ4F_preferences_t::compressionLevel, LZ4F_preferences_t::favorDecSpeed, LZ4F_preferences_t::frameInfo, FUZZ_rand32(), FUZZ_randomFrameInfo(), LZ4F_INIT_PREFERENCES, and LZ4HC_CLEVEL_MAX.