1 /*
2  * Copyright (c) 2016-present, 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 <stdlib.h>      /* malloc, calloc, free */
17 #include <string.h>      /* 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 /*! ZSTD_isError() :
34  *  tells if a return value is an error code */
35 unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
36 
37 /*! ZSTD_getErrorName() :
38  *  provides error code string from function result (useful for debugging) */
39 const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
40 
41 /*! ZSTD_getError() :
42  *  convert a `size_t` function result into a proper ZSTD_errorCode enum */
43 ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
44 
45 /*! ZSTD_getErrorString() :
46  *  provides error code string from enum */
47 const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); }
48 
49 
50 
51 /*=**************************************************************
52 *  Custom allocator
53 ****************************************************************/
54 void* ZSTD_malloc(size_t size, ZSTD_customMem customMem)
55 {
56     return customMem.customAlloc(customMem.opaque, size);
57 }
58 
59 void* ZSTD_calloc(size_t size, ZSTD_customMem customMem)
60 {
61     /* calloc implemented as malloc+memset;
62         * not as efficient as calloc, but next best guess for custom malloc */
63     void* const ptr = customMem.customAlloc(customMem.opaque, size);
64     memset(ptr, 0, size);
65     return ptr;
66 }
67 
68 void ZSTD_free(void* ptr, ZSTD_customMem customMem)
69 {
70     if (ptr!=NULL)
71         customMem.customFree(customMem.opaque, ptr);
72 }
73