1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Paul Borman at Krystal Technologies.
10 *
11 * Copyright (c) 2011 The FreeBSD Foundation
12 * All rights reserved.
13 * Portions of this software were developed by David Chisnall
14 * under sponsorship from the FreeBSD Foundation.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD: stable/12/lib/libc/locale/ascii.c 339435 2018-10-19 00:24:23Z gjb $");
43
44 #include <errno.h>
45 #include <limits.h>
46 #include <runetype.h>
47 #include <stddef.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51 #include <wchar.h>
52 #include "mblocal.h"
53
54 static size_t _ascii_mbrtowc(wchar_t * __restrict, const char * __restrict,
55 size_t, mbstate_t * __restrict);
56 static int _ascii_mbsinit(const mbstate_t *);
57 static size_t _ascii_mbsnrtowcs(wchar_t * __restrict dst,
58 const char ** __restrict src, size_t nms, size_t len,
59 mbstate_t * __restrict ps __unused);
60 static size_t _ascii_wcrtomb(char * __restrict, wchar_t,
61 mbstate_t * __restrict);
62 static size_t _ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
63 size_t, size_t, mbstate_t * __restrict);
64
65 int
_ascii_init(struct xlocale_ctype * l,_RuneLocale * rl)66 _ascii_init(struct xlocale_ctype *l,_RuneLocale *rl)
67 {
68
69 l->__mbrtowc = _ascii_mbrtowc;
70 l->__mbsinit = _ascii_mbsinit;
71 l->__mbsnrtowcs = _ascii_mbsnrtowcs;
72 l->__wcrtomb = _ascii_wcrtomb;
73 l->__wcsnrtombs = _ascii_wcsnrtombs;
74 l->runes = rl;
75 l->__mb_cur_max = 1;
76 l->__mb_sb_limit = 128;
77 return(0);
78 }
79
80 static int
_ascii_mbsinit(const mbstate_t * ps __unused)81 _ascii_mbsinit(const mbstate_t *ps __unused)
82 {
83
84 /*
85 * Encoding is not state dependent - we are always in the
86 * initial state.
87 */
88 return (1);
89 }
90
91 static size_t
_ascii_mbrtowc(wchar_t * __restrict pwc,const char * __restrict s,size_t n,mbstate_t * __restrict ps __unused)92 _ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
93 mbstate_t * __restrict ps __unused)
94 {
95
96 if (s == NULL)
97 /* Reset to initial shift state (no-op) */
98 return (0);
99 if (n == 0)
100 /* Incomplete multibyte sequence */
101 return ((size_t)-2);
102 if (*s & 0x80) {
103 errno = EILSEQ;
104 return ((size_t)-1);
105 }
106 if (pwc != NULL)
107 *pwc = (unsigned char)*s;
108 return (*s == '\0' ? 0 : 1);
109 }
110
111 static size_t
_ascii_wcrtomb(char * __restrict s,wchar_t wc,mbstate_t * __restrict ps __unused)112 _ascii_wcrtomb(char * __restrict s, wchar_t wc,
113 mbstate_t * __restrict ps __unused)
114 {
115
116 if (s == NULL)
117 /* Reset to initial shift state (no-op) */
118 return (1);
119 if (wc < 0 || wc > 127) {
120 errno = EILSEQ;
121 return ((size_t)-1);
122 }
123 *s = (unsigned char)wc;
124 return (1);
125 }
126
127 static size_t
_ascii_mbsnrtowcs(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps __unused)128 _ascii_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
129 size_t nms, size_t len, mbstate_t * __restrict ps __unused)
130 {
131 const char *s;
132 size_t nchr;
133
134 if (dst == NULL) {
135 for (s = *src; nms > 0 && *s != '\0'; s++, nms--) {
136 if (*s & 0x80) {
137 errno = EILSEQ;
138 return ((size_t)-1);
139 }
140 }
141 return (s - *src);
142 }
143
144 s = *src;
145 nchr = 0;
146 while (len-- > 0 && nms-- > 0) {
147 if (*s & 0x80) {
148 *src = s;
149 errno = EILSEQ;
150 return ((size_t)-1);
151 }
152 if ((*dst++ = (unsigned char)*s++) == L'\0') {
153 *src = NULL;
154 return (nchr);
155 }
156 nchr++;
157 }
158 *src = s;
159 return (nchr);
160 }
161
162 static size_t
_ascii_wcsnrtombs(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps __unused)163 _ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
164 size_t nwc, size_t len, mbstate_t * __restrict ps __unused)
165 {
166 const wchar_t *s;
167 size_t nchr;
168
169 if (dst == NULL) {
170 for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
171 if (*s < 0 || *s > 127) {
172 errno = EILSEQ;
173 return ((size_t)-1);
174 }
175 }
176 return (s - *src);
177 }
178
179 s = *src;
180 nchr = 0;
181 while (len-- > 0 && nwc-- > 0) {
182 if (*s < 0 || *s > 127) {
183 *src = s;
184 errno = EILSEQ;
185 return ((size_t)-1);
186 }
187 if ((*dst++ = *s++) == '\0') {
188 *src = NULL;
189 return (nchr);
190 }
191 nchr++;
192 }
193 *src = s;
194 return (nchr);
195 }
196
197