85 lines
3.2 KiB
C
85 lines
3.2 KiB
C
/*
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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*/
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#define ZSTD_STATIC_LINKING_ONLY
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#include "zstd_helpers.h"
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#include "fuzz_helpers.h"
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#include "zstd.h"
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static void set(ZSTD_CCtx *cctx, ZSTD_cParameter param, unsigned value)
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{
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FUZZ_ZASSERT(ZSTD_CCtx_setParameter(cctx, param, value));
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}
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static void setRand(ZSTD_CCtx *cctx, ZSTD_cParameter param, unsigned min,
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unsigned max, uint32_t *state) {
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unsigned const value = FUZZ_rand32(state, min, max);
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set(cctx, param, value);
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}
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ZSTD_compressionParameters FUZZ_randomCParams(size_t srcSize, uint32_t *state)
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{
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/* Select compression parameters */
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ZSTD_compressionParameters cParams;
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cParams.windowLog = FUZZ_rand32(state, ZSTD_WINDOWLOG_MIN, 15);
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cParams.hashLog = FUZZ_rand32(state, ZSTD_HASHLOG_MIN, 15);
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cParams.chainLog = FUZZ_rand32(state, ZSTD_CHAINLOG_MIN, 16);
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cParams.searchLog = FUZZ_rand32(state, ZSTD_SEARCHLOG_MIN, 9);
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cParams.searchLength = FUZZ_rand32(state, ZSTD_SEARCHLENGTH_MIN,
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ZSTD_SEARCHLENGTH_MAX);
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cParams.targetLength = FUZZ_rand32(state, 0, 512);
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cParams.strategy = FUZZ_rand32(state, ZSTD_fast, ZSTD_btultra);
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return ZSTD_adjustCParams(cParams, srcSize, 0);
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}
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ZSTD_frameParameters FUZZ_randomFParams(uint32_t *state)
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{
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/* Select frame parameters */
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ZSTD_frameParameters fParams;
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fParams.contentSizeFlag = FUZZ_rand32(state, 0, 1);
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fParams.checksumFlag = FUZZ_rand32(state, 0, 1);
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fParams.noDictIDFlag = FUZZ_rand32(state, 0, 1);
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return fParams;
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}
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ZSTD_parameters FUZZ_randomParams(size_t srcSize, uint32_t *state)
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{
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ZSTD_parameters params;
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params.cParams = FUZZ_randomCParams(srcSize, state);
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params.fParams = FUZZ_randomFParams(state);
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return params;
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}
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void FUZZ_setRandomParameters(ZSTD_CCtx *cctx, size_t srcSize, uint32_t *state)
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{
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ZSTD_compressionParameters cParams = FUZZ_randomCParams(srcSize, state);
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set(cctx, ZSTD_p_windowLog, cParams.windowLog);
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set(cctx, ZSTD_p_hashLog, cParams.hashLog);
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set(cctx, ZSTD_p_chainLog, cParams.chainLog);
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set(cctx, ZSTD_p_searchLog, cParams.searchLog);
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set(cctx, ZSTD_p_minMatch, cParams.searchLength);
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set(cctx, ZSTD_p_targetLength, cParams.targetLength);
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set(cctx, ZSTD_p_compressionStrategy, cParams.strategy);
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/* Select frame parameters */
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setRand(cctx, ZSTD_p_contentSizeFlag, 0, 1, state);
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setRand(cctx, ZSTD_p_checksumFlag, 0, 1, state);
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setRand(cctx, ZSTD_p_dictIDFlag, 0, 1, state);
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setRand(cctx, ZSTD_p_forceAttachDict, -2, 2, state);
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/* Select long distance matchig parameters */
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setRand(cctx, ZSTD_p_enableLongDistanceMatching, 0, 1, state);
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setRand(cctx, ZSTD_p_ldmHashLog, ZSTD_HASHLOG_MIN, 16, state);
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setRand(cctx, ZSTD_p_ldmMinMatch, ZSTD_LDM_MINMATCH_MIN,
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ZSTD_LDM_MINMATCH_MAX, state);
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setRand(cctx, ZSTD_p_ldmBucketSizeLog, 0, ZSTD_LDM_BUCKETSIZELOG_MAX,
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state);
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setRand(cctx, ZSTD_p_ldmHashEveryLog, 0,
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ZSTD_WINDOWLOG_MAX - ZSTD_HASHLOG_MIN, state);
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}
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