1 // -*- C++ -*- 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 _LIBCPP_STRING_H 11 #define _LIBCPP_STRING_H 12 13 /* 14 string.h synopsis 15 16 Macros: 17 18 NULL 19 20 Types: 21 22 size_t 23 24 void* memcpy(void* restrict s1, const void* restrict s2, size_t n); 25 void* memmove(void* s1, const void* s2, size_t n); 26 char* strcpy (char* restrict s1, const char* restrict s2); 27 char* strncpy(char* restrict s1, const char* restrict s2, size_t n); 28 char* strcat (char* restrict s1, const char* restrict s2); 29 char* strncat(char* restrict s1, const char* restrict s2, size_t n); 30 int memcmp(const void* s1, const void* s2, size_t n); 31 int strcmp (const char* s1, const char* s2); 32 int strncmp(const char* s1, const char* s2, size_t n); 33 int strcoll(const char* s1, const char* s2); 34 size_t strxfrm(char* restrict s1, const char* restrict s2, size_t n); 35 const void* memchr(const void* s, int c, size_t n); 36 void* memchr( void* s, int c, size_t n); 37 const char* strchr(const char* s, int c); 38 char* strchr( char* s, int c); 39 size_t strcspn(const char* s1, const char* s2); 40 const char* strpbrk(const char* s1, const char* s2); 41 char* strpbrk( char* s1, const char* s2); 42 const char* strrchr(const char* s, int c); 43 char* strrchr( char* s, int c); 44 size_t strspn(const char* s1, const char* s2); 45 const char* strstr(const char* s1, const char* s2); 46 char* strstr( char* s1, const char* s2); 47 char* strtok(char* restrict s1, const char* restrict s2); 48 void* memset(void* s, int c, size_t n); 49 char* strerror(int errnum); 50 size_t strlen(const char* s); 51 52 */ 53 54 #include <__config> 55 56 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 57 # pragma GCC system_header 58 #endif 59 60 #if __has_include_next(<string.h>) 61 # include_next <string.h> 62 #endif 63 64 // MSVCRT, GNU libc and its derivates may already have the correct prototype in 65 // <string.h>. This macro can be defined by users if their C library provides 66 // the right signature. 67 #if defined(__CORRECT_ISO_CPP_STRING_H_PROTO) || defined(_LIBCPP_MSVCRT) || defined(_STRING_H_CPLUSPLUS_98_CONFORMANCE_) 68 # define _LIBCPP_STRING_H_HAS_CONST_OVERLOADS 69 #endif 70 71 #if defined(__cplusplus) && !defined(_LIBCPP_STRING_H_HAS_CONST_OVERLOADS) && defined(_LIBCPP_PREFERRED_OVERLOAD) 72 extern "C++" { 73 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strchr(const char* __s, int __c) { 74 return __builtin_strchr(__s, __c); 75 } 76 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strchr(char* __s, int __c) { 77 return __builtin_strchr(__s, __c); 78 } 79 80 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strpbrk(const char* __s1, const char* __s2) { 81 return __builtin_strpbrk(__s1, __s2); 82 } 83 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strpbrk(char* __s1, const char* __s2) { 84 return __builtin_strpbrk(__s1, __s2); 85 } 86 87 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strrchr(const char* __s, int __c) { 88 return __builtin_strrchr(__s, __c); 89 } 90 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strrchr(char* __s, int __c) { 91 return __builtin_strrchr(__s, __c); 92 } 93 94 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const void* memchr(const void* __s, int __c, size_t __n) { 95 return __builtin_memchr(__s, __c, __n); 96 } 97 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD void* memchr(void* __s, int __c, size_t __n) { 98 return __builtin_memchr(__s, __c, __n); 99 } 100 101 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strstr(const char* __s1, const char* __s2) { 102 return __builtin_strstr(__s1, __s2); 103 } 104 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strstr(char* __s1, const char* __s2) { 105 return __builtin_strstr(__s1, __s2); 106 } 107 } // extern "C++" 108 #endif 109 110 #endif // _LIBCPP_STRING_H 111