1 /* Checking macros for wchar functions.
2 Copyright (C) 2005-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #ifndef _WCHAR_H
20 # error "Never include <bits/wchar2.h> directly; use <wchar.h> instead."
21 #endif
22
23 __fortify_function wchar_t *
24 __NTH (wmemcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
25 size_t __n))
26 {
27 return __glibc_fortify_n (wmemcpy, __n, sizeof (wchar_t),
28 __glibc_objsize0 (__s1),
29 __s1, __s2, __n);
30 }
31
32 __fortify_function wchar_t *
33 __NTH (wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n))
34 {
35 return __glibc_fortify_n (wmemmove, __n, sizeof (wchar_t),
36 __glibc_objsize0 (__s1),
37 __s1, __s2, __n);
38 }
39
40 #ifdef __USE_GNU
41 __fortify_function wchar_t *
42 __NTH (wmempcpy (wchar_t *__restrict __s1, const wchar_t *__restrict __s2,
43 size_t __n))
44 {
45 return __glibc_fortify_n (wmempcpy, __n, sizeof (wchar_t),
46 __glibc_objsize0 (__s1),
47 __s1, __s2, __n);
48 }
49 #endif
50
51 __fortify_function wchar_t *
52 __NTH (wmemset (wchar_t *__s, wchar_t __c, size_t __n))
53 {
54 return __glibc_fortify_n (wmemset, __n, sizeof (wchar_t),
55 __glibc_objsize0 (__s),
56 __s, __c, __n);
57 }
58
59 __fortify_function wchar_t *
60 __NTH (wcscpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
61 {
62 size_t sz = __glibc_objsize (__dest);
63 if (sz != (size_t) -1)
64 return __wcscpy_chk (__dest, __src, sz / sizeof (wchar_t));
65 return __wcscpy_alias (__dest, __src);
66 }
67
68 __fortify_function wchar_t *
69 __NTH (wcpcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
70 {
71 size_t sz = __glibc_objsize (__dest);
72 if (sz != (size_t) -1)
73 return __wcpcpy_chk (__dest, __src, sz / sizeof (wchar_t));
74 return __wcpcpy_alias (__dest, __src);
75 }
76
77 __fortify_function wchar_t *
78 __NTH (wcsncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
79 size_t __n))
80 {
81 return __glibc_fortify_n (wcsncpy, __n, sizeof (wchar_t),
82 __glibc_objsize (__dest),
83 __dest, __src, __n);
84 }
85
86 __fortify_function wchar_t *
87 __NTH (wcpncpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
88 size_t __n))
89 {
90 return __glibc_fortify_n (wcpncpy, __n, sizeof (wchar_t),
91 __glibc_objsize (__dest),
92 __dest, __src, __n);
93 }
94
95 __fortify_function wchar_t *
96 __NTH (wcscat (wchar_t *__restrict __dest, const wchar_t *__restrict __src))
97 {
98 size_t sz = __glibc_objsize (__dest);
99 if (sz != (size_t) -1)
100 return __wcscat_chk (__dest, __src, sz / sizeof (wchar_t));
101 return __wcscat_alias (__dest, __src);
102 }
103
104 __fortify_function wchar_t *
105 __NTH (wcsncat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
106 size_t __n))
107 {
108 size_t sz = __glibc_objsize (__dest);
109 if (sz != (size_t) -1)
110 return __wcsncat_chk (__dest, __src, __n, sz / sizeof (wchar_t));
111 return __wcsncat_alias (__dest, __src, __n);
112 }
113
114 #ifdef __USE_MISC
115 __fortify_function size_t
116 __NTH (wcslcpy (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
117 size_t __n))
118 {
119 if (__glibc_objsize (__dest) != (size_t) -1
120 && (!__builtin_constant_p (__n
121 > __glibc_objsize (__dest) / sizeof (wchar_t))
122 || __n > __glibc_objsize (__dest) / sizeof (wchar_t)))
123 return __wcslcpy_chk (__dest, __src, __n,
124 __glibc_objsize (__dest) / sizeof (wchar_t));
125 return __wcslcpy_alias (__dest, __src, __n);
126 }
127
128 __fortify_function size_t
129 __NTH (wcslcat (wchar_t *__restrict __dest, const wchar_t *__restrict __src,
130 size_t __n))
131 {
132 if (__glibc_objsize (__dest) != (size_t) -1
133 && (!__builtin_constant_p (__n > __glibc_objsize (__dest)
134 / sizeof (wchar_t))
135 || __n > __glibc_objsize (__dest) / sizeof (wchar_t)))
136 return __wcslcat_chk (__dest, __src, __n,
137 __glibc_objsize (__dest) / sizeof (wchar_t));
138 return __wcslcat_alias (__dest, __src, __n);
139 }
140 #endif /* __USE_MISC */
141
142 #ifdef __va_arg_pack
143 __fortify_function int
144 __NTH (swprintf (wchar_t *__restrict __s, size_t __n,
145 const wchar_t *__restrict __fmt, ...))
146 {
147 size_t sz = __glibc_objsize (__s);
148 if (sz != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
149 return __swprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
150 sz / sizeof (wchar_t), __fmt, __va_arg_pack ());
151 return __swprintf_alias (__s, __n, __fmt, __va_arg_pack ());
152 }
153 #elif !defined __cplusplus
154 /* XXX We might want to have support in gcc for swprintf. */
155 # define swprintf(s, n, ...) \
156 (__glibc_objsize (s) != (size_t) -1 || __USE_FORTIFY_LEVEL > 1 \
157 ? __swprintf_chk (s, n, __USE_FORTIFY_LEVEL - 1, \
158 __glibc_objsize (s) / sizeof (wchar_t), __VA_ARGS__) \
159 : swprintf (s, n, __VA_ARGS__))
160 #endif
161
162 __fortify_function int
163 __NTH (vswprintf (wchar_t *__restrict __s, size_t __n,
164 const wchar_t *__restrict __fmt, __gnuc_va_list __ap))
165 {
166 size_t sz = __glibc_objsize (__s);
167 if (sz != (size_t) -1 || __USE_FORTIFY_LEVEL > 1)
168 return __vswprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
169 sz / sizeof (wchar_t), __fmt, __ap);
170 return __vswprintf_alias (__s, __n, __fmt, __ap);
171 }
172
173
174 #if __USE_FORTIFY_LEVEL > 1
175
176 # ifdef __va_arg_pack
177 __fortify_function int
178 wprintf (const wchar_t *__restrict __fmt, ...)
179 {
180 return __wprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack ());
181 }
182
183 __fortify_function int
184 fwprintf (__FILE *__restrict __stream, const wchar_t *__restrict __fmt, ...)
185 {
186 return __fwprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt,
187 __va_arg_pack ());
188 }
189 # elif !defined __cplusplus
190 # define wprintf(...) \
191 __wprintf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
192 # define fwprintf(stream, ...) \
193 __fwprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
194 # endif
195
196 __fortify_function int
197 vwprintf (const wchar_t *__restrict __fmt, __gnuc_va_list __ap)
198 {
199 return __vwprintf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __ap);
200 }
201
202 __fortify_function int
203 vfwprintf (__FILE *__restrict __stream,
204 const wchar_t *__restrict __fmt, __gnuc_va_list __ap)
205 {
206 return __vfwprintf_chk (__stream, __USE_FORTIFY_LEVEL - 1, __fmt, __ap);
207 }
208
209 #endif
210 __fortify_function __wur wchar_t *
211 fgetws (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
212 {
213 size_t sz = __glibc_objsize (__s);
214 if (__glibc_safe_or_unknown_len (__n, sizeof (wchar_t), sz))
215 return __fgetws_alias (__s, __n, __stream);
216 if (__glibc_unsafe_len (__n, sizeof (wchar_t), sz))
217 return __fgetws_chk_warn (__s, sz / sizeof (wchar_t), __n, __stream);
218 return __fgetws_chk (__s, sz / sizeof (wchar_t), __n, __stream);
219 }
220
221 #ifdef __USE_GNU
222 __fortify_function __wur wchar_t *
223 fgetws_unlocked (wchar_t *__restrict __s, int __n, __FILE *__restrict __stream)
224 {
225 size_t sz = __glibc_objsize (__s);
226 if (__glibc_safe_or_unknown_len (__n, sizeof (wchar_t), sz))
227 return __fgetws_unlocked_alias (__s, __n, __stream);
228 if (__glibc_unsafe_len (__n, sizeof (wchar_t), sz))
229 return __fgetws_unlocked_chk_warn (__s, sz / sizeof (wchar_t), __n,
230 __stream);
231 return __fgetws_unlocked_chk (__s, sz / sizeof (wchar_t), __n, __stream);
232 }
233 #endif
234
235 __fortify_function __wur size_t
236 __NTH (wcrtomb (char *__restrict __s, wchar_t __wchar,
237 mbstate_t *__restrict __ps))
238 {
239 /* We would have to include <limits.h> to get a definition of MB_LEN_MAX.
240 But this would only disturb the namespace. So we define our own
241 version here. */
242 #define __WCHAR_MB_LEN_MAX 16
243 #if defined MB_LEN_MAX && MB_LEN_MAX != __WCHAR_MB_LEN_MAX
244 # error "Assumed value of MB_LEN_MAX wrong"
245 #endif
246 if (__glibc_objsize (__s) != (size_t) -1
247 && __WCHAR_MB_LEN_MAX > __glibc_objsize (__s))
248 return __wcrtomb_chk (__s, __wchar, __ps, __glibc_objsize (__s));
249 return __wcrtomb_alias (__s, __wchar, __ps);
250 }
251
252 __fortify_function size_t
253 __NTH (mbsrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
254 size_t __len, mbstate_t *__restrict __ps))
255 {
256 return __glibc_fortify_n (mbsrtowcs, __len, sizeof (wchar_t),
257 __glibc_objsize (__dst),
258 __dst, __src, __len, __ps);
259 }
260
261 __fortify_function size_t
262 __NTH (wcsrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
263 size_t __len, mbstate_t *__restrict __ps))
264 {
265 return __glibc_fortify (wcsrtombs, __len, sizeof (char),
266 __glibc_objsize (__dst),
267 __dst, __src, __len, __ps);
268 }
269
270
271 #ifdef __USE_XOPEN2K8
272 __fortify_function size_t
273 __NTH (mbsnrtowcs (wchar_t *__restrict __dst, const char **__restrict __src,
274 size_t __nmc, size_t __len, mbstate_t *__restrict __ps))
275 {
276 return __glibc_fortify_n (mbsnrtowcs, __len, sizeof (wchar_t),
277 __glibc_objsize (__dst),
278 __dst, __src, __nmc, __len, __ps);
279 }
280
281 __fortify_function size_t
282 __NTH (wcsnrtombs (char *__restrict __dst, const wchar_t **__restrict __src,
283 size_t __nwc, size_t __len, mbstate_t *__restrict __ps))
284 {
285 return __glibc_fortify (wcsnrtombs, __len, sizeof (char),
286 __glibc_objsize (__dst),
287 __dst, __src, __nwc, __len, __ps);
288 }
289 #endif