mirror of
https://github.com/facebook/zstd.git
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279 lines
9.2 KiB
C
279 lines
9.2 KiB
C
/*
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* Copyright (c) 2016-present, Yann Collet, 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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* You may select, at your option, one of the above-listed licenses.
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*/
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#include "config.h"
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/* Define a config for each fast level we want to test with. */
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#define FAST_LEVEL(x) \
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param_value_t const level_fast##x##_param_values[] = { \
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{.param = ZSTD_c_compressionLevel, .value = -x}, \
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}; \
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config_t const level_fast##x = { \
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.name = "level -" #x, \
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.cli_args = "--fast=" #x, \
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.param_values = PARAM_VALUES(level_fast##x##_param_values), \
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}; \
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config_t const level_fast##x##_dict = { \
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.name = "level -" #x " with dict", \
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.cli_args = "--fast=" #x, \
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.param_values = PARAM_VALUES(level_fast##x##_param_values), \
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.use_dictionary = 1, \
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};
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/* Define a config for each level we want to test with. */
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#define LEVEL(x) \
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param_value_t const level_##x##_param_values[] = { \
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{.param = ZSTD_c_compressionLevel, .value = x}, \
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}; \
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config_t const level_##x = { \
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.name = "level " #x, \
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.cli_args = "-" #x, \
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.param_values = PARAM_VALUES(level_##x##_param_values), \
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}; \
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config_t const level_##x##_dict = { \
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.name = "level " #x " with dict", \
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.cli_args = "-" #x, \
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.param_values = PARAM_VALUES(level_##x##_param_values), \
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.use_dictionary = 1, \
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};
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#define PARAM_VALUES(pv) \
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{ .data = pv, .size = sizeof(pv) / sizeof((pv)[0]) }
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#include "levels.h"
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#undef LEVEL
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#undef FAST_LEVEL
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static config_t no_pledged_src_size = {
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.name = "no source size",
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.cli_args = "",
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.param_values = PARAM_VALUES(level_0_param_values),
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.no_pledged_src_size = 1,
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};
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static param_value_t const ldm_param_values[] = {
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{.param = ZSTD_c_enableLongDistanceMatching, .value = 1},
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};
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static config_t ldm = {
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.name = "long distance mode",
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.cli_args = "--long",
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.param_values = PARAM_VALUES(ldm_param_values),
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};
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static param_value_t const mt_param_values[] = {
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{.param = ZSTD_c_nbWorkers, .value = 2},
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};
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static config_t mt = {
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.name = "multithreaded",
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.cli_args = "-T2",
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.param_values = PARAM_VALUES(mt_param_values),
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};
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static param_value_t const mt_ldm_param_values[] = {
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{.param = ZSTD_c_nbWorkers, .value = 2},
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{.param = ZSTD_c_enableLongDistanceMatching, .value = 1},
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};
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static config_t mt_ldm = {
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.name = "multithreaded long distance mode",
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.cli_args = "-T2 --long",
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.param_values = PARAM_VALUES(mt_ldm_param_values),
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};
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static param_value_t mt_advanced_param_values[] = {
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{.param = ZSTD_c_nbWorkers, .value = 2},
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{.param = ZSTD_c_literalCompressionMode, .value = ZSTD_lcm_uncompressed},
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};
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static config_t mt_advanced = {
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.name = "multithreaded with advanced params",
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.cli_args = "-T2 --no-compress-literals",
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.param_values = PARAM_VALUES(mt_advanced_param_values),
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};
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static param_value_t const small_wlog_param_values[] = {
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{.param = ZSTD_c_windowLog, .value = 10},
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};
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static config_t small_wlog = {
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.name = "small window log",
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.cli_args = "--zstd=wlog=10",
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.param_values = PARAM_VALUES(small_wlog_param_values),
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};
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static param_value_t const small_hlog_param_values[] = {
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{.param = ZSTD_c_hashLog, .value = 6},
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{.param = ZSTD_c_strategy, .value = (int)ZSTD_btopt},
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};
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static config_t small_hlog = {
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.name = "small hash log",
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.cli_args = "--zstd=hlog=6,strat=7",
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.param_values = PARAM_VALUES(small_hlog_param_values),
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};
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static param_value_t const small_clog_param_values[] = {
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{.param = ZSTD_c_chainLog, .value = 6},
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{.param = ZSTD_c_strategy, .value = (int)ZSTD_btopt},
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};
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static config_t small_clog = {
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.name = "small chain log",
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.cli_args = "--zstd=clog=6,strat=7",
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.param_values = PARAM_VALUES(small_clog_param_values),
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};
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static param_value_t const uncompressed_literals_param_values[] = {
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{.param = ZSTD_c_compressionLevel, .value = 3},
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{.param = ZSTD_c_literalCompressionMode, .value = ZSTD_lcm_uncompressed},
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};
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static config_t uncompressed_literals = {
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.name = "uncompressed literals",
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.cli_args = "-3 --no-compress-literals",
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.param_values = PARAM_VALUES(uncompressed_literals_param_values),
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};
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static param_value_t const uncompressed_literals_opt_param_values[] = {
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{.param = ZSTD_c_compressionLevel, .value = 19},
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{.param = ZSTD_c_literalCompressionMode, .value = ZSTD_lcm_uncompressed},
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};
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static config_t uncompressed_literals_opt = {
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.name = "uncompressed literals optimal",
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.cli_args = "-19 --no-compress-literals",
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.param_values = PARAM_VALUES(uncompressed_literals_opt_param_values),
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};
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static param_value_t const huffman_literals_param_values[] = {
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{.param = ZSTD_c_compressionLevel, .value = -1},
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{.param = ZSTD_c_literalCompressionMode, .value = ZSTD_lcm_huffman},
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};
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static config_t huffman_literals = {
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.name = "huffman literals",
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.cli_args = "--fast=1 --compress-literals",
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.param_values = PARAM_VALUES(huffman_literals_param_values),
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};
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static param_value_t const explicit_params_param_values[] = {
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{.param = ZSTD_c_checksumFlag, .value = 1},
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{.param = ZSTD_c_contentSizeFlag, .value = 0},
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{.param = ZSTD_c_dictIDFlag, .value = 0},
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{.param = ZSTD_c_strategy, .value = (int)ZSTD_greedy},
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{.param = ZSTD_c_windowLog, .value = 18},
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{.param = ZSTD_c_hashLog, .value = 21},
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{.param = ZSTD_c_chainLog, .value = 21},
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{.param = ZSTD_c_targetLength, .value = 100},
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};
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static config_t explicit_params = {
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.name = "explicit params",
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.cli_args = "--no-check --no-dictID --zstd=strategy=3,wlog=18,hlog=21,clog=21,tlen=100",
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.param_values = PARAM_VALUES(explicit_params_param_values),
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};
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static config_t const* g_configs[] = {
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#define FAST_LEVEL(x) &level_fast##x, &level_fast##x##_dict,
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#define LEVEL(x) &level_##x, &level_##x##_dict,
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#include "levels.h"
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#undef LEVEL
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#undef FAST_LEVEL
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&no_pledged_src_size,
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&ldm,
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&mt,
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&mt_ldm,
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&small_wlog,
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&small_hlog,
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&small_clog,
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&explicit_params,
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&uncompressed_literals,
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&uncompressed_literals_opt,
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&huffman_literals,
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&mt_advanced,
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NULL,
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};
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config_t const* const* configs = g_configs;
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int config_skip_data(config_t const* config, data_t const* data) {
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return config->use_dictionary && !data_has_dict(data);
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}
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int config_get_level(config_t const* config)
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{
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param_values_t const params = config->param_values;
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size_t i;
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for (i = 0; i < params.size; ++i) {
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if (params.data[i].param == ZSTD_c_compressionLevel)
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return (int)params.data[i].value;
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}
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return CONFIG_NO_LEVEL;
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}
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ZSTD_parameters config_get_zstd_params(
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config_t const* config,
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uint64_t srcSize,
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size_t dictSize)
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{
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ZSTD_parameters zparams = {};
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param_values_t const params = config->param_values;
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int level = config_get_level(config);
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if (level == CONFIG_NO_LEVEL)
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level = 3;
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zparams = ZSTD_getParams(
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level,
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config->no_pledged_src_size ? ZSTD_CONTENTSIZE_UNKNOWN : srcSize,
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dictSize);
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for (size_t i = 0; i < params.size; ++i) {
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unsigned const value = params.data[i].value;
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switch (params.data[i].param) {
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case ZSTD_c_contentSizeFlag:
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zparams.fParams.contentSizeFlag = value;
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break;
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case ZSTD_c_checksumFlag:
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zparams.fParams.checksumFlag = value;
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break;
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case ZSTD_c_dictIDFlag:
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zparams.fParams.noDictIDFlag = !value;
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break;
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case ZSTD_c_windowLog:
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zparams.cParams.windowLog = value;
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break;
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case ZSTD_c_chainLog:
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zparams.cParams.chainLog = value;
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break;
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case ZSTD_c_hashLog:
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zparams.cParams.hashLog = value;
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break;
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case ZSTD_c_searchLog:
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zparams.cParams.searchLog = value;
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break;
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case ZSTD_c_minMatch:
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zparams.cParams.minMatch = value;
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break;
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case ZSTD_c_targetLength:
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zparams.cParams.targetLength = value;
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break;
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case ZSTD_c_strategy:
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zparams.cParams.strategy = (ZSTD_strategy)value;
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break;
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default:
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break;
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}
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}
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return zparams;
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}
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