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#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
55# include <__cxx03/string.h>
56#else
57# include <__config>
58
59# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
60# pragma GCC system_header
61# endif
62
63# if __has_include_next(<string.h>)
64# include_next <string.h>
65# endif
66
67// MSVCRT, GNU libc and its derivates may already have the correct prototype in
68// <string.h>. This macro can be defined by users if their C library provides
69// the right signature.
70# if defined(__CORRECT_ISO_CPP_STRING_H_PROTO) || defined(_LIBCPP_MSVCRT) || \
71 defined(_STRING_H_CPLUSPLUS_98_CONFORMANCE_)
72# define _LIBCPP_STRING_H_HAS_CONST_OVERLOADS
73# endif
74
75# if defined(__cplusplus) && !defined(_LIBCPP_STRING_H_HAS_CONST_OVERLOADS) && defined(_LIBCPP_PREFERRED_OVERLOAD)
76extern "C++" {
77inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strchr(const char* __s, int __c) {
78 return __builtin_strchr(__s, __c);
79}
80inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strchr(char* __s, int __c) {
81 return __builtin_strchr(__s, __c);
82}
83
84inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strpbrk(const char* __s1, const char* __s2) {
85 return __builtin_strpbrk(__s1, __s2);
86}
87inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strpbrk(char* __s1, const char* __s2) {
88 return __builtin_strpbrk(__s1, __s2);
89}
90
91inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strrchr(const char* __s, int __c) {
92 return __builtin_strrchr(__s, __c);
93}
94inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strrchr(char* __s, int __c) {
95 return __builtin_strrchr(__s, __c);
96}
97
98inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const void* memchr(const void* __s, int __c, size_t __n) {
99 return __builtin_memchr(__s, __c, __n);
100}
101inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD void* memchr(void* __s, int __c, size_t __n) {
102 return __builtin_memchr(__s, __c, __n);
103}
104
105inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strstr(const char* __s1, const char* __s2) {
106 return __builtin_strstr(__s1, __s2);
107}
108inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strstr(char* __s1, const char* __s2) {
109 return __builtin_strstr(__s1, __s2);
110}
111} // extern "C++"
112# endif
113#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
114
115#endif // _LIBCPP_STRING_H
116