1 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef KMP_SAFE_C_API_H 11 #define KMP_SAFE_C_API_H 12 13 #include "kmp_platform.h" 14 #include <string.h> 15 16 // Replacement for banned C API 17 18 // Not every unsafe call listed here is handled now, but keeping everything 19 // in one place should be handy for future maintenance. 20 #if KMP_OS_WINDOWS && KMP_MSVC_COMPAT 21 22 #define RSIZE_MAX_STR (4UL << 10) // 4KB 23 24 // _malloca was suggested, but it is not a drop-in replacement for _alloca 25 #define KMP_ALLOCA _alloca 26 27 #define KMP_MEMCPY_S memcpy_s 28 #define KMP_SNPRINTF sprintf_s 29 #define KMP_SSCANF sscanf_s 30 #define KMP_STRCPY_S strcpy_s 31 #define KMP_STRNCPY_S strncpy_s 32 33 // Use this only when buffer size is unknown 34 #define KMP_MEMCPY(dst, src, cnt) memcpy_s(dst, cnt, src, cnt) 35 36 #define KMP_STRLEN(str) strnlen_s(str, RSIZE_MAX_STR) 37 38 // Use this only when buffer size is unknown 39 #define KMP_STRNCPY(dst, src, cnt) strncpy_s(dst, cnt, src, cnt) 40 41 // _TRUNCATE insures buffer size > max string to print. 42 #define KMP_VSNPRINTF(dst, cnt, fmt, arg) \ 43 vsnprintf_s(dst, cnt, _TRUNCATE, fmt, arg) 44 45 #else // KMP_OS_WINDOWS 46 47 // For now, these macros use the existing API. 48 49 #define KMP_ALLOCA alloca 50 #define KMP_MEMCPY_S(dst, bsz, src, cnt) memcpy(dst, src, cnt) 51 #define KMP_SNPRINTF snprintf 52 #define KMP_SSCANF sscanf 53 #define KMP_STRCPY_S(dst, bsz, src) strcpy(dst, src) 54 #define KMP_STRNCPY_S(dst, bsz, src, cnt) strncpy(dst, src, cnt) 55 #define KMP_VSNPRINTF vsnprintf 56 #define KMP_STRNCPY strncpy 57 #define KMP_STRLEN strlen 58 #define KMP_MEMCPY memcpy 59 60 #endif // KMP_OS_WINDOWS 61 62 // Offer truncated version of strncpy 63 static inline void __kmp_strncpy_truncate(char *buffer, size_t buf_size, 64 char const *src, size_t src_size) { 65 if (src_size >= buf_size) { 66 src_size = buf_size - 1; 67 } 68 KMP_STRNCPY_S(buffer, buf_size, src, src_size); 69 buffer[src_size] = '\0'; 70 } 71 72 #endif // KMP_SAFE_C_API_H 73