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 16Macros: 17 18 NULL 19 20Types: 21 22 size_t 23 24void* memcpy(void* restrict s1, const void* restrict s2, size_t n); 25void* memmove(void* s1, const void* s2, size_t n); 26char* strcpy (char* restrict s1, const char* restrict s2); 27char* strncpy(char* restrict s1, const char* restrict s2, size_t n); 28char* strcat (char* restrict s1, const char* restrict s2); 29char* strncat(char* restrict s1, const char* restrict s2, size_t n); 30int memcmp(const void* s1, const void* s2, size_t n); 31int strcmp (const char* s1, const char* s2); 32int strncmp(const char* s1, const char* s2, size_t n); 33int strcoll(const char* s1, const char* s2); 34size_t strxfrm(char* restrict s1, const char* restrict s2, size_t n); 35const void* memchr(const void* s, int c, size_t n); 36 void* memchr( void* s, int c, size_t n); 37const char* strchr(const char* s, int c); 38 char* strchr( char* s, int c); 39size_t strcspn(const char* s1, const char* s2); 40const char* strpbrk(const char* s1, const char* s2); 41 char* strpbrk( char* s1, const char* s2); 42const char* strrchr(const char* s, int c); 43 char* strrchr( char* s, int c); 44size_t strspn(const char* s1, const char* s2); 45const char* strstr(const char* s1, const char* s2); 46 char* strstr( char* s1, const char* s2); 47char* strtok(char* restrict s1, const char* restrict s2); 48void* memset(void* s, int c, size_t n); 49char* strerror(int errnum); 50size_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) || \ 68 defined(__sun__) || defined(_STRING_H_CPLUSPLUS_98_CONFORMANCE_) 69#define _LIBCPP_STRING_H_HAS_CONST_OVERLOADS 70#endif 71 72#if defined(__cplusplus) && !defined(_LIBCPP_STRING_H_HAS_CONST_OVERLOADS) && defined(_LIBCPP_PREFERRED_OVERLOAD) 73extern "C++" { 74inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strchr(const char* __s, int __c) { 75 return __builtin_strchr(__s, __c); 76} 77inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strchr(char* __s, int __c) { 78 return __builtin_strchr(__s, __c); 79} 80 81inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strpbrk(const char* __s1, const char* __s2) { 82 return __builtin_strpbrk(__s1, __s2); 83} 84inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strpbrk(char* __s1, const char* __s2) { 85 return __builtin_strpbrk(__s1, __s2); 86} 87 88inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strrchr(const char* __s, int __c) { 89 return __builtin_strrchr(__s, __c); 90} 91inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strrchr(char* __s, int __c) { 92 return __builtin_strrchr(__s, __c); 93} 94 95inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const void* memchr(const void* __s, int __c, size_t __n) { 96 return __builtin_memchr(__s, __c, __n); 97} 98inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD void* memchr(void* __s, int __c, size_t __n) { 99 return __builtin_memchr(__s, __c, __n); 100} 101 102inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strstr(const char* __s1, const char* __s2) { 103 return __builtin_strstr(__s1, __s2); 104} 105inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strstr(char* __s1, const char* __s2) { 106 return __builtin_strstr(__s1, __s2); 107} 108} // extern "C++" 109#endif 110 111#endif // _LIBCPP_STRING_H 112