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
zstd_is_error(size_t code)21 unsigned int zstd_is_error(size_t code)
22 {
23 return ZSTD_isError(code);
24 }
25 EXPORT_SYMBOL(zstd_is_error);
26
zstd_get_error_code(size_t code)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
zstd_get_error_name(size_t code)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
zstd_dctx_workspace_bound(void)41 size_t zstd_dctx_workspace_bound(void)
42 {
43 return ZSTD_estimateDCtxSize();
44 }
45 EXPORT_SYMBOL(zstd_dctx_workspace_bound);
46
zstd_create_dctx_advanced(zstd_custom_mem custom_mem)47 zstd_dctx *zstd_create_dctx_advanced(zstd_custom_mem custom_mem)
48 {
49 return ZSTD_createDCtx_advanced(custom_mem);
50 }
51 EXPORT_SYMBOL(zstd_create_dctx_advanced);
52
zstd_free_dctx(zstd_dctx * dctx)53 size_t zstd_free_dctx(zstd_dctx *dctx)
54 {
55 return ZSTD_freeDCtx(dctx);
56 }
57 EXPORT_SYMBOL(zstd_free_dctx);
58
zstd_create_ddict_byreference(const void * dict,size_t dict_size,zstd_custom_mem custom_mem)59 zstd_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 }
66 EXPORT_SYMBOL(zstd_create_ddict_byreference);
67
zstd_free_ddict(zstd_ddict * ddict)68 size_t zstd_free_ddict(zstd_ddict *ddict)
69 {
70 return ZSTD_freeDDict(ddict);
71 }
72 EXPORT_SYMBOL(zstd_free_ddict);
73
zstd_init_dctx(void * workspace,size_t workspace_size)74 zstd_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 }
80 EXPORT_SYMBOL(zstd_init_dctx);
81
zstd_decompress_dctx(zstd_dctx * dctx,void * dst,size_t dst_capacity,const void * src,size_t src_size)82 size_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 }
87 EXPORT_SYMBOL(zstd_decompress_dctx);
88
zstd_decompress_using_ddict(zstd_dctx * dctx,void * dst,size_t dst_capacity,const void * src,size_t src_size,const zstd_ddict * ddict)89 size_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 }
96 EXPORT_SYMBOL(zstd_decompress_using_ddict);
97
zstd_dstream_workspace_bound(size_t max_window_size)98 size_t zstd_dstream_workspace_bound(size_t max_window_size)
99 {
100 return ZSTD_estimateDStreamSize(max_window_size);
101 }
102 EXPORT_SYMBOL(zstd_dstream_workspace_bound);
103
zstd_init_dstream(size_t max_window_size,void * workspace,size_t workspace_size)104 zstd_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 }
112 EXPORT_SYMBOL(zstd_init_dstream);
113
zstd_reset_dstream(zstd_dstream * dstream)114 size_t zstd_reset_dstream(zstd_dstream *dstream)
115 {
116 return ZSTD_resetDStream(dstream);
117 }
118 EXPORT_SYMBOL(zstd_reset_dstream);
119
zstd_decompress_stream(zstd_dstream * dstream,zstd_out_buffer * output,zstd_in_buffer * input)120 size_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 }
125 EXPORT_SYMBOL(zstd_decompress_stream);
126
zstd_find_frame_compressed_size(const void * src,size_t src_size)127 size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)
128 {
129 return ZSTD_findFrameCompressedSize(src, src_size);
130 }
131 EXPORT_SYMBOL(zstd_find_frame_compressed_size);
132
zstd_get_frame_header(zstd_frame_header * header,const void * src,size_t src_size)133 size_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 }
138 EXPORT_SYMBOL(zstd_get_frame_header);
139
140 MODULE_LICENSE("Dual BSD/GPL");
141 MODULE_DESCRIPTION("Zstd Decompressor");
142