2 //===----------------------------------------------------------------------===//
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
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_CSTRING
11 #define _LIBCPP_CSTRING
27 void* memcpy(void* restrict s1, const void* restrict s2, size_t n);
28 void* memmove(void* s1, const void* s2, size_t n);
29 char* strcpy (char* restrict s1, const char* restrict s2);
30 char* strncpy(char* restrict s1, const char* restrict s2, size_t n);
31 char* strcat (char* restrict s1, const char* restrict s2);
32 char* strncat(char* restrict s1, const char* restrict s2, size_t n);
33 int memcmp(const void* s1, const void* s2, size_t n);
34 int strcmp (const char* s1, const char* s2);
35 int strncmp(const char* s1, const char* s2, size_t n);
36 int strcoll(const char* s1, const char* s2);
37 size_t strxfrm(char* restrict s1, const char* restrict s2, size_t n);
38 const void* memchr(const void* s, int c, size_t n);
39 void* memchr( void* s, int c, size_t n);
40 const char* strchr(const char* s, int c);
41 char* strchr( char* s, int c);
42 size_t strcspn(const char* s1, const char* s2);
43 const char* strpbrk(const char* s1, const char* s2);
44 char* strpbrk( char* s1, const char* s2);
45 const char* strrchr(const char* s, int c);
46 char* strrchr( char* s, int c);
47 size_t strspn(const char* s1, const char* s2);
48 const char* strstr(const char* s1, const char* s2);
49 char* strstr( char* s1, const char* s2);
50 char* strtok(char* restrict s1, const char* restrict s2);
51 void* memset(void* s, int c, size_t n);
52 char* strerror(int errnum);
53 size_t strlen(const char* s);
60 #include <__cstddef/size_t.h>
61 #include <__type_traits/is_constant_evaluated.h>
65 #ifndef _LIBCPP_STRING_H
66 # error <cstring> tried including <string.h> but didn't find libc++'s <string.h> header. \
67 This usually means that your header search paths are not configured properly. \
68 The header search paths should contain the C++ Standard Library headers before \
69 any C Standard Library, and you are probably using compiler flags that make that \
73 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
74 # pragma GCC system_header
77 _LIBCPP_BEGIN_NAMESPACE_STD
79 using ::memcpy _LIBCPP_USING_IF_EXISTS;
80 using ::memmove _LIBCPP_USING_IF_EXISTS;
81 using ::strcpy _LIBCPP_USING_IF_EXISTS;
82 using ::strncpy _LIBCPP_USING_IF_EXISTS;
83 using ::strcat _LIBCPP_USING_IF_EXISTS;
84 using ::strncat _LIBCPP_USING_IF_EXISTS;
85 using ::memcmp _LIBCPP_USING_IF_EXISTS;
86 using ::strcmp _LIBCPP_USING_IF_EXISTS;
87 using ::strncmp _LIBCPP_USING_IF_EXISTS;
88 using ::strcoll _LIBCPP_USING_IF_EXISTS;
89 using ::strxfrm _LIBCPP_USING_IF_EXISTS;
90 using ::memchr _LIBCPP_USING_IF_EXISTS;
91 using ::strchr _LIBCPP_USING_IF_EXISTS;
92 using ::strcspn _LIBCPP_USING_IF_EXISTS;
93 using ::strpbrk _LIBCPP_USING_IF_EXISTS;
94 using ::strrchr _LIBCPP_USING_IF_EXISTS;
95 using ::strspn _LIBCPP_USING_IF_EXISTS;
96 using ::strstr _LIBCPP_USING_IF_EXISTS;
97 using ::strtok _LIBCPP_USING_IF_EXISTS;
98 using ::memset _LIBCPP_USING_IF_EXISTS;
99 using ::strerror _LIBCPP_USING_IF_EXISTS;
100 using ::strlen _LIBCPP_USING_IF_EXISTS;
102 _LIBCPP_END_NAMESPACE_STD
104 #endif // _LIBCPP_CSTRING