// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause/* * Copyright (c) Meta Platforms, Inc. and affiliates. * 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. */ #include <linux/kernel.h>#include <linux/module.h>#include <linux/string.h>#include <linux/zstd.h> #include "common/zstd_deps.h" /* Common symbols. zstd_compress must depend on zstd_decompress. */ unsigned int zstd_is_error(size_t code){	return ZSTD_isError(code);}EXPORT_SYMBOL(zstd_is_error); zstd_error_code zstd_get_error_code(size_t code){	return ZSTD_getErrorCode(code);}EXPORT_SYMBOL(zstd_get_error_code); const char *zstd_get_error_name(size_t code){	return ZSTD_getErrorName(code);}EXPORT_SYMBOL(zstd_get_error_name); /* Decompression symbols. */ size_t zstd_dctx_workspace_bound(void){	return ZSTD_estimateDCtxSize();}EXPORT_SYMBOL(zstd_dctx_workspace_bound); zstd_dctx *zstd_create_dctx_advanced(zstd_custom_mem custom_mem){	return ZSTD_createDCtx_advanced(custom_mem);}EXPORT_SYMBOL(zstd_create_dctx_advanced); size_t zstd_free_dctx(zstd_dctx *dctx){	return ZSTD_freeDCtx(dctx);}EXPORT_SYMBOL(zstd_free_dctx); zstd_ddict *zstd_create_ddict_byreference(const void *dict, size_t dict_size,					  zstd_custom_mem custom_mem){	return ZSTD_createDDict_advanced(dict, dict_size, ZSTD_dlm_byRef,					 ZSTD_dct_auto, custom_mem); }EXPORT_SYMBOL(zstd_create_ddict_byreference); size_t zstd_free_ddict(zstd_ddict *ddict){	return ZSTD_freeDDict(ddict);}EXPORT_SYMBOL(zstd_free_ddict); zstd_dctx *zstd_init_dctx(void *workspace, size_t workspace_size){	if (workspace == NULL)		return NULL;	return ZSTD_initStaticDCtx(workspace, workspace_size);}EXPORT_SYMBOL(zstd_init_dctx); size_t zstd_decompress_dctx(zstd_dctx *dctx, void *dst, size_t dst_capacity,	const void *src, size_t src_size){	return ZSTD_decompressDCtx(dctx, dst, dst_capacity, src, src_size);}EXPORT_SYMBOL(zstd_decompress_dctx); size_t zstd_decompress_using_ddict(zstd_dctx *dctx,	void *dst, size_t dst_capacity, const void* src, size_t src_size,	const zstd_ddict* ddict){	return ZSTD_decompress_usingDDict(dctx, dst, dst_capacity, src,					  src_size, ddict);}EXPORT_SYMBOL(zstd_decompress_using_ddict); size_t zstd_dstream_workspace_bound(size_t max_window_size){	return ZSTD_estimateDStreamSize(max_window_size);}EXPORT_SYMBOL(zstd_dstream_workspace_bound); zstd_dstream *zstd_init_dstream(size_t max_window_size, void *workspace,	size_t workspace_size){	if (workspace == NULL)		return NULL;	(void)max_window_size;	return ZSTD_initStaticDStream(workspace, workspace_size);}EXPORT_SYMBOL(zstd_init_dstream); size_t zstd_reset_dstream(zstd_dstream *dstream){	return ZSTD_DCtx_reset(dstream, ZSTD_reset_session_only);}EXPORT_SYMBOL(zstd_reset_dstream); size_t zstd_decompress_stream(zstd_dstream *dstream, zstd_out_buffer *output,	zstd_in_buffer *input){	return ZSTD_decompressStream(dstream, output, input);}EXPORT_SYMBOL(zstd_decompress_stream); size_t zstd_find_frame_compressed_size(const void *src, size_t src_size){	return ZSTD_findFrameCompressedSize(src, src_size);}EXPORT_SYMBOL(zstd_find_frame_compressed_size); size_t zstd_get_frame_header(zstd_frame_header *header, const void *src,	size_t src_size){	return ZSTD_getFrameHeader(header, src, src_size);}EXPORT_SYMBOL(zstd_get_frame_header); MODULE_LICENSE("Dual BSD/GPL");MODULE_DESCRIPTION("Zstd Decompressor");