1 /*
2  * Copyright (c) 2016-2020, 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 #define ZSTD_DEPS_NEED_MALLOC
17 #include "zstd_deps.h"   /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */
18 #include "error_private.h"
19 #include "zstd_internal.h"
20 
21 
22 /*-****************************************
23 *  Version
24 ******************************************/
25 unsigned ZSTD_versionNumber(void) { return ZSTD_VERSION_NUMBER; }
26 
27 const char* ZSTD_versionString(void) { return ZSTD_VERSION_STRING; }
28 
29 
30 /*-****************************************
31 *  ZSTD Error Management
32 ******************************************/
33 #undef ZSTD_isError   /* defined within zstd_internal.h */
34 /*! ZSTD_isError() :
35  *  tells if a return value is an error code
36  *  symbol is required for external callers */
37 unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
38 
39 /*! ZSTD_getErrorName() :
40  *  provides error code string from function result (useful for debugging) */
41 const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
42 
43 /*! ZSTD_getError() :
44  *  convert a `size_t` function result into a proper ZSTD_errorCode enum */
45 ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
46 
47 /*! ZSTD_getErrorString() :
48  *  provides error code string from enum */
49 const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); }
50 
51 
52 
53 /*=**************************************************************
54 *  Custom allocator
55 ****************************************************************/
56 void* ZSTD_customMalloc(size_t size, ZSTD_customMem customMem)
57 {
58     if (customMem.customAlloc)
59         return customMem.customAlloc(customMem.opaque, size);
60     return ZSTD_malloc(size);
61 }
62 
63 void* ZSTD_customCalloc(size_t size, ZSTD_customMem customMem)
64 {
65     if (customMem.customAlloc) {
66         /* calloc implemented as malloc+memset;
67          * not as efficient as calloc, but next best guess for custom malloc */
68         void* const ptr = customMem.customAlloc(customMem.opaque, size);
69         ZSTD_memset(ptr, 0, size);
70         return ptr;
71     }
72     return ZSTD_calloc(1, size);
73 }
74 
75 void ZSTD_customFree(void* ptr, ZSTD_customMem customMem)
76 {
77     if (ptr!=NULL) {
78         if (customMem.customFree)
79             customMem.customFree(customMem.opaque, ptr);
80         else
81             ZSTD_free(ptr);
82     }
83 }
84