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 ******************************************/
ZSTD_versionNumber(void)25 unsigned ZSTD_versionNumber(void) { return ZSTD_VERSION_NUMBER; }
26
ZSTD_versionString(void)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 */
ZSTD_isError(size_t 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) */
ZSTD_getErrorName(size_t code)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 */
ZSTD_getErrorCode(size_t code)43 ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
44
45 /*! ZSTD_getErrorString() :
46 * provides error code string from enum */
ZSTD_getErrorString(ZSTD_ErrorCode code)47 const char* ZSTD_getErrorString(ZSTD_ErrorCode code) { return ERR_getErrorString(code); }
48
49 /*! g_debuglog_enable :
50 * turn on/off debug traces (global switch) */
51 #if defined(ZSTD_DEBUG) && (ZSTD_DEBUG >= 2)
52 int g_debuglog_enable = 1;
53 #endif
54
55
56 /*=**************************************************************
57 * Custom allocator
58 ****************************************************************/
ZSTD_malloc(size_t size,ZSTD_customMem customMem)59 void* ZSTD_malloc(size_t size, ZSTD_customMem customMem)
60 {
61 if (customMem.customAlloc)
62 return customMem.customAlloc(customMem.opaque, size);
63 return malloc(size);
64 }
65
ZSTD_calloc(size_t size,ZSTD_customMem customMem)66 void* ZSTD_calloc(size_t size, ZSTD_customMem customMem)
67 {
68 if (customMem.customAlloc) {
69 /* calloc implemented as malloc+memset;
70 * not as efficient as calloc, but next best guess for custom malloc */
71 void* const ptr = customMem.customAlloc(customMem.opaque, size);
72 memset(ptr, 0, size);
73 return ptr;
74 }
75 return calloc(1, size);
76 }
77
ZSTD_free(void * ptr,ZSTD_customMem customMem)78 void ZSTD_free(void* ptr, ZSTD_customMem customMem)
79 {
80 if (ptr!=NULL) {
81 if (customMem.customFree)
82 customMem.customFree(customMem.opaque, ptr);
83 else
84 free(ptr);
85 }
86 }
87