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 #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 #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_malloc(size_t size, ZSTD_customMem customMem) 57 { 58 if (customMem.customAlloc) 59 return customMem.customAlloc(customMem.opaque, size); 60 return malloc(size); 61 } 62 63 void* ZSTD_calloc(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 memset(ptr, 0, size); 70 return ptr; 71 } 72 return calloc(1, size); 73 } 74 75 void ZSTD_free(void* ptr, ZSTD_customMem customMem) 76 { 77 if (ptr!=NULL) { 78 if (customMem.customFree) 79 customMem.customFree(customMem.opaque, ptr); 80 else 81 free(ptr); 82 } 83 } 84