1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause 2 /* 3 * Copyright (c) Facebook, Inc. 4 * All rights reserved. 5 * 6 * This source code is licensed under both the BSD-style license (found in the 7 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 8 * 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 21 unsigned int zstd_is_error(size_t code) 22 { 23 return ZSTD_isError(code); 24 } 25 EXPORT_SYMBOL(zstd_is_error); 26 27 zstd_error_code zstd_get_error_code(size_t code) 28 { 29 return ZSTD_getErrorCode(code); 30 } 31 EXPORT_SYMBOL(zstd_get_error_code); 32 33 const char *zstd_get_error_name(size_t code) 34 { 35 return ZSTD_getErrorName(code); 36 } 37 EXPORT_SYMBOL(zstd_get_error_name); 38 39 /* Decompression symbols. */ 40 41 size_t zstd_dctx_workspace_bound(void) 42 { 43 return ZSTD_estimateDCtxSize(); 44 } 45 EXPORT_SYMBOL(zstd_dctx_workspace_bound); 46 47 zstd_dctx *zstd_init_dctx(void *workspace, size_t workspace_size) 48 { 49 if (workspace == NULL) 50 return NULL; 51 return ZSTD_initStaticDCtx(workspace, workspace_size); 52 } 53 EXPORT_SYMBOL(zstd_init_dctx); 54 55 size_t zstd_decompress_dctx(zstd_dctx *dctx, void *dst, size_t dst_capacity, 56 const void *src, size_t src_size) 57 { 58 return ZSTD_decompressDCtx(dctx, dst, dst_capacity, src, src_size); 59 } 60 EXPORT_SYMBOL(zstd_decompress_dctx); 61 62 size_t zstd_dstream_workspace_bound(size_t max_window_size) 63 { 64 return ZSTD_estimateDStreamSize(max_window_size); 65 } 66 EXPORT_SYMBOL(zstd_dstream_workspace_bound); 67 68 zstd_dstream *zstd_init_dstream(size_t max_window_size, void *workspace, 69 size_t workspace_size) 70 { 71 if (workspace == NULL) 72 return NULL; 73 (void)max_window_size; 74 return ZSTD_initStaticDStream(workspace, workspace_size); 75 } 76 EXPORT_SYMBOL(zstd_init_dstream); 77 78 size_t zstd_reset_dstream(zstd_dstream *dstream) 79 { 80 return ZSTD_resetDStream(dstream); 81 } 82 EXPORT_SYMBOL(zstd_reset_dstream); 83 84 size_t zstd_decompress_stream(zstd_dstream *dstream, zstd_out_buffer *output, 85 zstd_in_buffer *input) 86 { 87 return ZSTD_decompressStream(dstream, output, input); 88 } 89 EXPORT_SYMBOL(zstd_decompress_stream); 90 91 size_t zstd_find_frame_compressed_size(const void *src, size_t src_size) 92 { 93 return ZSTD_findFrameCompressedSize(src, src_size); 94 } 95 EXPORT_SYMBOL(zstd_find_frame_compressed_size); 96 97 size_t zstd_get_frame_header(zstd_frame_header *header, const void *src, 98 size_t src_size) 99 { 100 return ZSTD_getFrameHeader(header, src, src_size); 101 } 102 EXPORT_SYMBOL(zstd_get_frame_header); 103 104 MODULE_LICENSE("Dual BSD/GPL"); 105 MODULE_DESCRIPTION("Zstd Decompressor"); 106