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) || \
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)
73 extern "C++" {
74 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strchr(const char* __s, int __c) {
75   return __builtin_strchr(__s, __c);
76 }
77 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strchr(char* __s, int __c) {
78   return __builtin_strchr(__s, __c);
79 }
80 
81 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strpbrk(const char* __s1, const char* __s2) {
82   return __builtin_strpbrk(__s1, __s2);
83 }
84 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strpbrk(char* __s1, const char* __s2) {
85   return __builtin_strpbrk(__s1, __s2);
86 }
87 
88 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strrchr(const char* __s, int __c) {
89   return __builtin_strrchr(__s, __c);
90 }
91 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD char* strrchr(char* __s, int __c) {
92   return __builtin_strrchr(__s, __c);
93 }
94 
95 inline _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 }
98 inline _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 
102 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD const char* strstr(const char* __s1, const char* __s2) {
103   return __builtin_strstr(__s1, __s2);
104 }
105 inline _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