87 lines
2.3 KiB
C
87 lines
2.3 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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#ifndef CONFIG_H
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#define CONFIG_H
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#include <stddef.h>
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#define ZSTD_STATIC_LINKING_ONLY
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#include <zstd.h>
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#include "data.h"
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typedef struct {
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ZSTD_cParameter param;
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int value;
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} param_value_t;
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typedef struct {
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size_t size;
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param_value_t const* data;
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} param_values_t;
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/**
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* The config tells the compression method what options to use.
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*/
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typedef struct {
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const char* name; /**< Identifies the config in the results table */
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/**
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* Optional arguments to pass to the CLI. If not set, CLI-based methods
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* will skip this config.
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*/
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char const* cli_args;
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/**
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* Parameters to pass to the advanced API. If the advanced API isn't used,
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* the parameters will be derived from these.
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*/
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param_values_t param_values;
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/**
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* Boolean parameter that says if we should use a dictionary. If the data
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* doesn't have a dictionary, this config is skipped. Defaults to no.
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*/
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int use_dictionary;
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/**
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* Boolean parameter that says if we should pass the pledged source size
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* when the method allows it. Defaults to yes.
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*/
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int no_pledged_src_size;
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} config_t;
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/**
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* Returns true if the config should skip this data.
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* For instance, if the config requires a dictionary but the data doesn't have
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* one.
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*/
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int config_skip_data(config_t const* config, data_t const* data);
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#define CONFIG_NO_LEVEL (-ZSTD_TARGETLENGTH_MAX - 1)
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/**
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* Returns the compression level specified by the config, or CONFIG_NO_LEVEL if
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* no level is specified. Note that 0 is a valid compression level, meaning
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* default.
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*/
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int config_get_level(config_t const* config);
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/**
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* Returns the compression parameters specified by the config.
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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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* The NULL-terminated list of configs.
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*/
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extern config_t const* const* configs;
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#endif
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