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_CWCHAR
11#define _LIBCPP_CWCHAR
12
13/*
14 cwchar synopsis
15
16Macros:
17
18 NULL
19 WCHAR_MAX
20 WCHAR_MIN
21 WEOF
22
23namespace std
24{
25
26Types:
27
28 mbstate_t
29 size_t
30 tm
31 wint_t
32
33int fwprintf(FILE* restrict stream, const wchar_t* restrict format, ...);
34int fwscanf(FILE* restrict stream, const wchar_t* restrict format, ...);
35int swprintf(wchar_t* restrict s, size_t n, const wchar_t* restrict format, ...);
36int swscanf(const wchar_t* restrict s, const wchar_t* restrict format, ...);
37int vfwprintf(FILE* restrict stream, const wchar_t* restrict format, va_list arg);
38int vfwscanf(FILE* restrict stream, const wchar_t* restrict format, va_list arg); // C99
39int vswprintf(wchar_t* restrict s, size_t n, const wchar_t* restrict format, va_list arg);
40int vswscanf(const wchar_t* restrict s, const wchar_t* restrict format, va_list arg); // C99
41int vwprintf(const wchar_t* restrict format, va_list arg);
42int vwscanf(const wchar_t* restrict format, va_list arg); // C99
43int wprintf(const wchar_t* restrict format, ...);
44int wscanf(const wchar_t* restrict format, ...);
45wint_t fgetwc(FILE* stream);
46wchar_t* fgetws(wchar_t* restrict s, int n, FILE* restrict stream);
47wint_t fputwc(wchar_t c, FILE* stream);
48int fputws(const wchar_t* restrict s, FILE* restrict stream);
49int fwide(FILE* stream, int mode);
50wint_t getwc(FILE* stream);
51wint_t getwchar();
52wint_t putwc(wchar_t c, FILE* stream);
53wint_t putwchar(wchar_t c);
54wint_t ungetwc(wint_t c, FILE* stream);
55double wcstod(const wchar_t* restrict nptr, wchar_t** restrict endptr);
56float wcstof(const wchar_t* restrict nptr, wchar_t** restrict endptr); // C99
57long double wcstold(const wchar_t* restrict nptr, wchar_t** restrict endptr); // C99
58long wcstol(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base);
59long long wcstoll(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base); // C99
60unsigned long wcstoul(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base);
61unsigned long long wcstoull(const wchar_t* restrict nptr, wchar_t** restrict endptr, int base); // C99
62wchar_t* wcscpy(wchar_t* restrict s1, const wchar_t* restrict s2);
63wchar_t* wcsncpy(wchar_t* restrict s1, const wchar_t* restrict s2, size_t n);
64wchar_t* wcscat(wchar_t* restrict s1, const wchar_t* restrict s2);
65wchar_t* wcsncat(wchar_t* restrict s1, const wchar_t* restrict s2, size_t n);
66int wcscmp(const wchar_t* s1, const wchar_t* s2);
67int wcscoll(const wchar_t* s1, const wchar_t* s2);
68int wcsncmp(const wchar_t* s1, const wchar_t* s2, size_t n);
69size_t wcsxfrm(wchar_t* restrict s1, const wchar_t* restrict s2, size_t n);
70const wchar_t* wcschr(const wchar_t* s, wchar_t c);
71 wchar_t* wcschr( wchar_t* s, wchar_t c);
72size_t wcscspn(const wchar_t* s1, const wchar_t* s2);
73size_t wcslen(const wchar_t* s);
74const wchar_t* wcspbrk(const wchar_t* s1, const wchar_t* s2);
75 wchar_t* wcspbrk( wchar_t* s1, const wchar_t* s2);
76const wchar_t* wcsrchr(const wchar_t* s, wchar_t c);
77 wchar_t* wcsrchr( wchar_t* s, wchar_t c);
78size_t wcsspn(const wchar_t* s1, const wchar_t* s2);
79const wchar_t* wcsstr(const wchar_t* s1, const wchar_t* s2);
80 wchar_t* wcsstr( wchar_t* s1, const wchar_t* s2);
81wchar_t* wcstok(wchar_t* restrict s1, const wchar_t* restrict s2, wchar_t** restrict ptr);
82const wchar_t* wmemchr(const wchar_t* s, wchar_t c, size_t n);
83 wchar_t* wmemchr( wchar_t* s, wchar_t c, size_t n);
84int wmemcmp(wchar_t* restrict s1, const wchar_t* restrict s2, size_t n);
85wchar_t* wmemcpy(wchar_t* restrict s1, const wchar_t* restrict s2, size_t n);
86wchar_t* wmemmove(wchar_t* s1, const wchar_t* s2, size_t n);
87wchar_t* wmemset(wchar_t* s, wchar_t c, size_t n);
88size_t wcsftime(wchar_t* restrict s, size_t maxsize, const wchar_t* restrict format,
89 const tm* restrict timeptr);
90wint_t btowc(int c);
91int wctob(wint_t c);
92int mbsinit(const mbstate_t* ps);
93size_t mbrlen(const char* restrict s, size_t n, mbstate_t* restrict ps);
94size_t mbrtowc(wchar_t* restrict pwc, const char* restrict s, size_t n, mbstate_t* restrict ps);
95size_t wcrtomb(char* restrict s, wchar_t wc, mbstate_t* restrict ps);
96size_t mbsrtowcs(wchar_t* restrict dst, const char** restrict src, size_t len,
97 mbstate_t* restrict ps);
98size_t wcsrtombs(char* restrict dst, const wchar_t** restrict src, size_t len,
99 mbstate_t* restrict ps);
100
101} // std
102
103*/
104
105#include <__config>
106#include <__type_traits/copy_cv.h>
107#include <__type_traits/is_constant_evaluated.h>
108#include <__type_traits/is_equality_comparable.h>
109#include <__type_traits/is_same.h>
110#include <__type_traits/remove_cv.h>
111#include <cwctype>
112
113#include <wchar.h>
114
115#ifndef _LIBCPP_WCHAR_H
116# error <cwchar> tried including <wchar.h> but didn't find libc++'s <wchar.h> header. \
117 This usually means that your header search paths are not configured properly. \
118 The header search paths should contain the C++ Standard Library headers before \
119 any C Standard Library, and you are probably using compiler flags that make that \
120 not be the case.
121#endif
122
123#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
124# pragma GCC system_header
125#endif
126
127_LIBCPP_BEGIN_NAMESPACE_STD
128
129using ::mbstate_t _LIBCPP_USING_IF_EXISTS;
130using ::size_t _LIBCPP_USING_IF_EXISTS;
131using ::tm _LIBCPP_USING_IF_EXISTS;
132using ::wint_t _LIBCPP_USING_IF_EXISTS;
133using ::FILE _LIBCPP_USING_IF_EXISTS;
134using ::fwprintf _LIBCPP_USING_IF_EXISTS;
135using ::fwscanf _LIBCPP_USING_IF_EXISTS;
136using ::swprintf _LIBCPP_USING_IF_EXISTS;
137using ::vfwprintf _LIBCPP_USING_IF_EXISTS;
138using ::vswprintf _LIBCPP_USING_IF_EXISTS;
139using ::swscanf _LIBCPP_USING_IF_EXISTS;
140using ::vfwscanf _LIBCPP_USING_IF_EXISTS;
141using ::vswscanf _LIBCPP_USING_IF_EXISTS;
142using ::fgetwc _LIBCPP_USING_IF_EXISTS;
143using ::fgetws _LIBCPP_USING_IF_EXISTS;
144using ::fputwc _LIBCPP_USING_IF_EXISTS;
145using ::fputws _LIBCPP_USING_IF_EXISTS;
146using ::fwide _LIBCPP_USING_IF_EXISTS;
147using ::getwc _LIBCPP_USING_IF_EXISTS;
148using ::putwc _LIBCPP_USING_IF_EXISTS;
149using ::ungetwc _LIBCPP_USING_IF_EXISTS;
150using ::wcstod _LIBCPP_USING_IF_EXISTS;
151using ::wcstof _LIBCPP_USING_IF_EXISTS;
152using ::wcstold _LIBCPP_USING_IF_EXISTS;
153using ::wcstol _LIBCPP_USING_IF_EXISTS;
154using ::wcstoll _LIBCPP_USING_IF_EXISTS;
155using ::wcstoul _LIBCPP_USING_IF_EXISTS;
156using ::wcstoull _LIBCPP_USING_IF_EXISTS;
157using ::wcscpy _LIBCPP_USING_IF_EXISTS;
158using ::wcsncpy _LIBCPP_USING_IF_EXISTS;
159using ::wcscat _LIBCPP_USING_IF_EXISTS;
160using ::wcsncat _LIBCPP_USING_IF_EXISTS;
161using ::wcscmp _LIBCPP_USING_IF_EXISTS;
162using ::wcscoll _LIBCPP_USING_IF_EXISTS;
163using ::wcsncmp _LIBCPP_USING_IF_EXISTS;
164using ::wcsxfrm _LIBCPP_USING_IF_EXISTS;
165using ::wcschr _LIBCPP_USING_IF_EXISTS;
166using ::wcspbrk _LIBCPP_USING_IF_EXISTS;
167using ::wcsrchr _LIBCPP_USING_IF_EXISTS;
168using ::wcsstr _LIBCPP_USING_IF_EXISTS;
169using ::wmemchr _LIBCPP_USING_IF_EXISTS;
170using ::wcscspn _LIBCPP_USING_IF_EXISTS;
171using ::wcslen _LIBCPP_USING_IF_EXISTS;
172using ::wcsspn _LIBCPP_USING_IF_EXISTS;
173using ::wcstok _LIBCPP_USING_IF_EXISTS;
174using ::wmemcmp _LIBCPP_USING_IF_EXISTS;
175using ::wmemcpy _LIBCPP_USING_IF_EXISTS;
176using ::wmemmove _LIBCPP_USING_IF_EXISTS;
177using ::wmemset _LIBCPP_USING_IF_EXISTS;
178using ::wcsftime _LIBCPP_USING_IF_EXISTS;
179using ::btowc _LIBCPP_USING_IF_EXISTS;
180using ::wctob _LIBCPP_USING_IF_EXISTS;
181using ::mbsinit _LIBCPP_USING_IF_EXISTS;
182using ::mbrlen _LIBCPP_USING_IF_EXISTS;
183using ::mbrtowc _LIBCPP_USING_IF_EXISTS;
184using ::wcrtomb _LIBCPP_USING_IF_EXISTS;
185using ::mbsrtowcs _LIBCPP_USING_IF_EXISTS;
186using ::wcsrtombs _LIBCPP_USING_IF_EXISTS;
187
188using ::getwchar _LIBCPP_USING_IF_EXISTS;
189using ::vwscanf _LIBCPP_USING_IF_EXISTS;
190using ::wscanf _LIBCPP_USING_IF_EXISTS;
191
192using ::putwchar _LIBCPP_USING_IF_EXISTS;
193using ::vwprintf _LIBCPP_USING_IF_EXISTS;
194using ::wprintf _LIBCPP_USING_IF_EXISTS;
195
196inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 size_t __constexpr_wcslen(const wchar_t* __str) {
197#if __has_builtin(__builtin_wcslen)
198 return __builtin_wcslen(__str);
199#else
200 if (!__libcpp_is_constant_evaluated())
201 return std::wcslen(__str);
202
203 size_t __len = 0;
204 for (; *__str != L'\0'; ++__str)
205 ++__len;
206 return __len;
207#endif
208}
209
210inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int
211__constexpr_wmemcmp(const wchar_t* __lhs, const wchar_t* __rhs, size_t __count) {
212#if __has_builtin(__builtin_wmemcmp)
213 return __builtin_wmemcmp(__lhs, __rhs, __count);
214#else
215 if (!__libcpp_is_constant_evaluated())
216 return std::wmemcmp(__lhs, __rhs, __count);
217
218 for (; __count; --__count, ++__lhs, ++__rhs) {
219 if (*__lhs < *__rhs)
220 return -1;
221 if (*__rhs < *__lhs)
222 return 1;
223 }
224 return 0;
225#endif
226}
227
228template <class _Tp, class _Up>
229_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Tp* __constexpr_wmemchr(_Tp* __str, _Up __value, size_t __count) {
230 static_assert(sizeof(_Tp) == sizeof(wchar_t)&& _LIBCPP_ALIGNOF(_Tp) >= _LIBCPP_ALIGNOF(wchar_t) &&
231 __libcpp_is_trivially_equality_comparable<_Tp, _Tp>::value,
232 "Calling wmemchr on non-trivially equality comparable types is unsafe.");
233
234#if __has_builtin(__builtin_wmemchr)
235 if (!__libcpp_is_constant_evaluated()) {
236 wchar_t __value_buffer = 0;
237 __builtin_memcpy(&__value_buffer, &__value, sizeof(wchar_t));
238 return reinterpret_cast<_Tp*>(
239 __builtin_wmemchr(reinterpret_cast<__copy_cv_t<_Tp, wchar_t>*>(__str), __value_buffer, __count));
240 }
241# if _LIBCPP_STD_VER >= 17
242 else if constexpr (is_same_v<remove_cv_t<_Tp>, wchar_t>)
243 return __builtin_wmemchr(__str, __value, __count);
244# endif
245#endif // __has_builtin(__builtin_wmemchr)
246
247 for (; __count; --__count) {
248 if (*__str == __value)
249 return __str;
250 ++__str;
251 }
252 return nullptr;
253}
254
255_LIBCPP_END_NAMESPACE_STD
256
257#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
258# include <cstddef>
259#endif
260
261#endif // _LIBCPP_CWCHAR
262