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/*
* Copyright (c) 2016-2020, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
#ifndef CONFIG_H
#define CONFIG_H
#include <stddef.h>
#define ZSTD_STATIC_LINKING_ONLY
#include <zstd.h>
#include "data.h"
typedef struct {
ZSTD_cParameter param;
int value;
} param_value_t;
typedef struct {
size_t size;
param_value_t const* data;
} param_values_t;
/**
* The config tells the compression method what options to use.
*/
typedef struct {
const char* name; /**< Identifies the config in the results table */
/**
* Optional arguments to pass to the CLI. If not set, CLI-based methods
* will skip this config.
*/
char const* cli_args;
/**
* Parameters to pass to the advanced API. If the advanced API isn't used,
* the parameters will be derived from these.
*/
param_values_t param_values;
/**
* Boolean parameter that says if we should use a dictionary. If the data
* doesn't have a dictionary, this config is skipped. Defaults to no.
*/
int use_dictionary;
/**
* Boolean parameter that says if we should pass the pledged source size
* when the method allows it. Defaults to yes.
*/
int no_pledged_src_size;
} config_t;
/**
* Returns true if the config should skip this data.
* For instance, if the config requires a dictionary but the data doesn't have
* one.
*/
int config_skip_data(config_t const* config, data_t const* data);
#define CONFIG_NO_LEVEL (-ZSTD_TARGETLENGTH_MAX - 1)
/**
* Returns the compression level specified by the config, or CONFIG_NO_LEVEL if
* no level is specified. Note that 0 is a valid compression level, meaning
* default.
*/
int config_get_level(config_t const* config);
/**
* Returns the compression parameters specified by the config.
*/
ZSTD_parameters config_get_zstd_params(
config_t const* config,
uint64_t srcSize,
size_t dictSize);
/**
* The NULL-terminated list of configs.
*/
extern config_t const* const* configs;
#endif
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