1 /*
2 * Copyright (c) Yann Collet, Facebook, Inc.
3 * All rights reserved.
4 *
5 * This source code is licensed under both the BSD-style license (found in the
6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
7 * in the COPYING file in the root directory of this source tree).
8 * You may select, at your option, one of the above-listed licenses.
9 */
10
11
12
13 /*-*************************************
14 * Dependencies
15 ***************************************/
16 #include <linux/module.h>
17 #define ZSTD_DEPS_NEED_MALLOC
18 #include "zstd_deps.h" /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */
19 #include "error_private.h"
20 #include "zstd_internal.h"
21
22
23 /*-****************************************
24 * Version
25 ******************************************/
ZSTD_versionNumber(void)26 unsigned ZSTD_versionNumber(void) { return ZSTD_VERSION_NUMBER; }
27
ZSTD_versionString(void)28 const char* ZSTD_versionString(void) { return ZSTD_VERSION_STRING; }
29
30
31 /*-****************************************
32 * ZSTD Error Management
33 ******************************************/
34 #undef ZSTD_isError /* defined within zstd_internal.h */
35 /*! ZSTD_isError() :
36 * tells if a return value is an error code
37 * symbol is required for external callers */
ZSTD_isError(size_t code)38 unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
39 EXPORT_SYMBOL_GPL(ZSTD_isError);
40
41 /*! ZSTD_getErrorName() :
42 * provides error code string from function result (useful for debugging) */
ZSTD_getErrorName(size_t code)43 const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
44 EXPORT_SYMBOL_GPL(ZSTD_getErrorName);
45
46 /*! ZSTD_getError() :
47 * convert a `size_t` function result into a proper ZSTD_errorCode enum */
ZSTD_getErrorCode(size_t code)48 ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
49 EXPORT_SYMBOL_GPL(ZSTD_getErrorCode);
50
51 /*! ZSTD_getErrorString() :
52 * provides error code string from enum */
ZSTD_getErrorString(ZSTD_ErrorCode code)53 const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); }
54
55
56
57 /*=**************************************************************
58 * Custom allocator
59 ****************************************************************/
ZSTD_customMalloc(size_t size,ZSTD_customMem customMem)60 void* ZSTD_customMalloc(size_t size, ZSTD_customMem customMem)
61 {
62 if (customMem.customAlloc)
63 return customMem.customAlloc(customMem.opaque, size);
64 return ZSTD_malloc(size);
65 }
66 EXPORT_SYMBOL_GPL(ZSTD_customMalloc);
67
ZSTD_customCalloc(size_t size,ZSTD_customMem customMem)68 void* ZSTD_customCalloc(size_t size, ZSTD_customMem customMem)
69 {
70 if (customMem.customAlloc) {
71 /* calloc implemented as malloc+memset;
72 * not as efficient as calloc, but next best guess for custom malloc */
73 void* const ptr = customMem.customAlloc(customMem.opaque, size);
74 ZSTD_memset(ptr, 0, size);
75 return ptr;
76 }
77 return ZSTD_calloc(1, size);
78 }
79 EXPORT_SYMBOL_GPL(ZSTD_customCalloc);
80
ZSTD_customFree(void * ptr,ZSTD_customMem customMem)81 void ZSTD_customFree(void* ptr, ZSTD_customMem customMem)
82 {
83 if (ptr!=NULL) {
84 if (customMem.customFree)
85 customMem.customFree(customMem.opaque, ptr);
86 else
87 ZSTD_free(ptr);
88 }
89 }
90 EXPORT_SYMBOL_GPL(ZSTD_customFree);
91
92 MODULE_LICENSE("Dual BSD/GPL");
93 MODULE_DESCRIPTION("Zstd Common");
94