xref: /illumos-gate/usr/src/lib/libc/port/locale/none.c (revision 4a38094c1dd4980a3761849bfbdf92ae62c568f5)
1 /*
2  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
3  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
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  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 4. Neither the name of the University nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 #include "lint.h"
37 #include <errno.h>
38 #include <limits.h>
39 #include <stddef.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <wchar.h>
44 #include "mblocal.h"
45 #include "lctype.h"
46 
47 /* setup defaults */
48 
49 void
_none_init(struct lc_ctype * lct)50 _none_init(struct lc_ctype *lct)
51 {
52 	lct->lc_is_ascii = 1;
53 	lct->lc_mbrtowc = __mbrtowc_ascii;
54 	lct->lc_mbsinit = __mbsinit_ascii;
55 	lct->lc_mbsnrtowcs = __mbsnrtowcs_ascii;
56 	lct->lc_wcrtomb = __wcrtomb_ascii;
57 	lct->lc_wcsnrtombs = __wcsnrtombs_ascii;
58 	lct->lc_max_mblen = 1;
59 }
60 
61 int
__mbsinit_ascii(const mbstate_t * unused __unused)62 __mbsinit_ascii(const mbstate_t *unused __unused)
63 {
64 	/*
65 	 * Encoding is not state dependent - we are always in the
66 	 * initial state.
67 	 */
68 	return (1);
69 }
70 
71 size_t
__mbrtowc_ascii(wchar_t * _RESTRICT_KYWD pwc,const char * _RESTRICT_KYWD s,size_t n,mbstate_t * _RESTRICT_KYWD unused __unused,boolean_t zero)72 __mbrtowc_ascii(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s,
73     size_t n, mbstate_t *_RESTRICT_KYWD unused __unused, boolean_t zero)
74 {
75 	if (s == NULL)
76 		/* Reset to initial shift state (no-op) */
77 		return (0);
78 	if (n == 0)
79 		/* Incomplete multibyte sequence */
80 		return ((size_t)-2);
81 	if (pwc != NULL)
82 		*pwc = (unsigned char)*s;
83 	if (zero || *s != '\0') {
84 		return (1);
85 	} else {
86 		return (0);
87 	}
88 }
89 
90 size_t
__wcrtomb_ascii(char * _RESTRICT_KYWD s,wchar_t wc,mbstate_t * _RESTRICT_KYWD unused __unused)91 __wcrtomb_ascii(char *_RESTRICT_KYWD s, wchar_t wc,
92     mbstate_t *_RESTRICT_KYWD unused __unused)
93 {
94 	if (s == NULL)
95 		/* Reset to initial shift state (no-op) */
96 		return (1);
97 	if (wc < 0 || wc > UCHAR_MAX) {
98 		errno = EILSEQ;
99 		return ((size_t)-1);
100 	}
101 	*s = (unsigned char)wc;
102 	return (1);
103 }
104 
105 size_t
__mbsnrtowcs_ascii(wchar_t * _RESTRICT_KYWD dst,const char ** _RESTRICT_KYWD src,size_t nms,size_t len,mbstate_t * _RESTRICT_KYWD unused __unused)106 __mbsnrtowcs_ascii(wchar_t *_RESTRICT_KYWD dst, const char **_RESTRICT_KYWD src,
107     size_t nms, size_t len, mbstate_t *_RESTRICT_KYWD unused __unused)
108 {
109 	const char *s;
110 	size_t nchr;
111 
112 	if (dst == NULL) {
113 		s = memchr(*src, '\0', nms);
114 		return (s != NULL ? s - *src : nms);
115 	}
116 
117 	s = *src;
118 	nchr = 0;
119 	while (len-- > 0 && nms-- > 0) {
120 		if ((*dst++ = (unsigned char)*s++) == L'\0') {
121 			*src = NULL;
122 			return (nchr);
123 		}
124 		nchr++;
125 	}
126 	*src = s;
127 	return (nchr);
128 }
129 
130 size_t
__wcsnrtombs_ascii(char * _RESTRICT_KYWD dst,const wchar_t ** _RESTRICT_KYWD src,size_t nwc,size_t len,mbstate_t * _RESTRICT_KYWD unused __unused)131 __wcsnrtombs_ascii(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src,
132     size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD unused __unused)
133 {
134 	const wchar_t *s;
135 	size_t nchr;
136 
137 	if (dst == NULL) {
138 		for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
139 			if (*s < 0 || *s > UCHAR_MAX) {
140 				errno = EILSEQ;
141 				return ((size_t)-1);
142 			}
143 		}
144 		return (s - *src);
145 	}
146 
147 	s = *src;
148 	nchr = 0;
149 	while (len-- > 0 && nwc-- > 0) {
150 		if (*s < 0 || *s > UCHAR_MAX) {
151 			errno = EILSEQ;
152 			return ((size_t)-1);
153 		}
154 		if ((*dst++ = *s++) == '\0') {
155 			*src = NULL;
156 			return (nchr);
157 		}
158 		nchr++;
159 	}
160 	*src = s;
161 	return (nchr);
162 }
163