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1// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause2/*3 * Copyright (c) Facebook, Inc.4 * All rights reserved.5 *6 * This source code is licensed under both the BSD-style license (found in the7 * LICENSE file in the root directory of this source tree) and the GPLv2 (found8 * in the COPYING file in the root directory of this source tree).9 * You may select, at your option, one of the above-listed licenses.10 */11 12#include <linux/kernel.h>13#include <linux/module.h>14#include <linux/string.h>15#include <linux/zstd.h>16 17#include "common/zstd_deps.h"18 19/* Common symbols. zstd_compress must depend on zstd_decompress. */20 21unsigned int zstd_is_error(size_t code)22{23 return ZSTD_isError(code);24}25EXPORT_SYMBOL(zstd_is_error);26 27zstd_error_code zstd_get_error_code(size_t code)28{29 return ZSTD_getErrorCode(code);30}31EXPORT_SYMBOL(zstd_get_error_code);32 33const char *zstd_get_error_name(size_t code)34{35 return ZSTD_getErrorName(code);36}37EXPORT_SYMBOL(zstd_get_error_name);38 39/* Decompression symbols. */40 41size_t zstd_dctx_workspace_bound(void)42{43 return ZSTD_estimateDCtxSize();44}45EXPORT_SYMBOL(zstd_dctx_workspace_bound);46 47zstd_dctx *zstd_create_dctx_advanced(zstd_custom_mem custom_mem)48{49 return ZSTD_createDCtx_advanced(custom_mem);50}51EXPORT_SYMBOL(zstd_create_dctx_advanced);52 53size_t zstd_free_dctx(zstd_dctx *dctx)54{55 return ZSTD_freeDCtx(dctx);56}57EXPORT_SYMBOL(zstd_free_dctx);58 59zstd_ddict *zstd_create_ddict_byreference(const void *dict, size_t dict_size,60 zstd_custom_mem custom_mem)61{62 return ZSTD_createDDict_advanced(dict, dict_size, ZSTD_dlm_byRef,63 ZSTD_dct_auto, custom_mem);64 65}66EXPORT_SYMBOL(zstd_create_ddict_byreference);67 68size_t zstd_free_ddict(zstd_ddict *ddict)69{70 return ZSTD_freeDDict(ddict);71}72EXPORT_SYMBOL(zstd_free_ddict);73 74zstd_dctx *zstd_init_dctx(void *workspace, size_t workspace_size)75{76 if (workspace == NULL)77 return NULL;78 return ZSTD_initStaticDCtx(workspace, workspace_size);79}80EXPORT_SYMBOL(zstd_init_dctx);81 82size_t zstd_decompress_dctx(zstd_dctx *dctx, void *dst, size_t dst_capacity,83 const void *src, size_t src_size)84{85 return ZSTD_decompressDCtx(dctx, dst, dst_capacity, src, src_size);86}87EXPORT_SYMBOL(zstd_decompress_dctx);88 89size_t zstd_decompress_using_ddict(zstd_dctx *dctx,90 void *dst, size_t dst_capacity, const void* src, size_t src_size,91 const zstd_ddict* ddict)92{93 return ZSTD_decompress_usingDDict(dctx, dst, dst_capacity, src,94 src_size, ddict);95}96EXPORT_SYMBOL(zstd_decompress_using_ddict);97 98size_t zstd_dstream_workspace_bound(size_t max_window_size)99{100 return ZSTD_estimateDStreamSize(max_window_size);101}102EXPORT_SYMBOL(zstd_dstream_workspace_bound);103 104zstd_dstream *zstd_init_dstream(size_t max_window_size, void *workspace,105 size_t workspace_size)106{107 if (workspace == NULL)108 return NULL;109 (void)max_window_size;110 return ZSTD_initStaticDStream(workspace, workspace_size);111}112EXPORT_SYMBOL(zstd_init_dstream);113 114size_t zstd_reset_dstream(zstd_dstream *dstream)115{116 return ZSTD_resetDStream(dstream);117}118EXPORT_SYMBOL(zstd_reset_dstream);119 120size_t zstd_decompress_stream(zstd_dstream *dstream, zstd_out_buffer *output,121 zstd_in_buffer *input)122{123 return ZSTD_decompressStream(dstream, output, input);124}125EXPORT_SYMBOL(zstd_decompress_stream);126 127size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)128{129 return ZSTD_findFrameCompressedSize(src, src_size);130}131EXPORT_SYMBOL(zstd_find_frame_compressed_size);132 133size_t zstd_get_frame_header(zstd_frame_header *header, const void *src,134 size_t src_size)135{136 return ZSTD_getFrameHeader(header, src, src_size);137}138EXPORT_SYMBOL(zstd_get_frame_header);139 140MODULE_LICENSE("Dual BSD/GPL");141MODULE_DESCRIPTION("Zstd Decompressor");142