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
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_init_dctx(void *workspace, size_t workspace_size)
48{
49	if (workspace == NULL)
50		return NULL;
51	return ZSTD_initStaticDCtx(workspace, workspace_size);
52}
53EXPORT_SYMBOL(zstd_init_dctx);
54
55size_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}
60EXPORT_SYMBOL(zstd_decompress_dctx);
61
62size_t zstd_dstream_workspace_bound(size_t max_window_size)
63{
64	return ZSTD_estimateDStreamSize(max_window_size);
65}
66EXPORT_SYMBOL(zstd_dstream_workspace_bound);
67
68zstd_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}
76EXPORT_SYMBOL(zstd_init_dstream);
77
78size_t zstd_reset_dstream(zstd_dstream *dstream)
79{
80	return ZSTD_resetDStream(dstream);
81}
82EXPORT_SYMBOL(zstd_reset_dstream);
83
84size_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}
89EXPORT_SYMBOL(zstd_decompress_stream);
90
91size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)
92{
93	return ZSTD_findFrameCompressedSize(src, src_size);
94}
95EXPORT_SYMBOL(zstd_find_frame_compressed_size);
96
97size_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}
102EXPORT_SYMBOL(zstd_get_frame_header);
103
104MODULE_LICENSE("Dual BSD/GPL");
105MODULE_DESCRIPTION("Zstd Decompressor");
106