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#include "fuzz_helpers.h"
#include "lz4_helpers.h"
#include "lz4hc.h"
LZ4F_frameInfo_t FUZZ_randomFrameInfo(uint32_t* seed)
{
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;
}
LZ4F_preferences_t FUZZ_randomPreferences(uint32_t* seed)
{
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;
}
size_t FUZZ_decompressFrame(void* dst, const size_t dstCapacity,
const void* src, const size_t srcSize)
{
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;
}
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