2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
5 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
6 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
8 * The Regents of the University of California. All rights reserved.
10 * This code is derived from software contributed to Berkeley by
11 * Paul Borman at Krystal Technologies.
13 * Copyright (c) 2011 The FreeBSD Foundation
14 * All rights reserved.
15 * Portions of this software were developed by David Chisnall
16 * under sponsorship from the FreeBSD Foundation.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
26 * 3. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 #if defined(LIBC_SCCS) && !defined(lint)
44 static char sccsid[] = "@(#)euc.c 8.1 (Berkeley) 6/4/93";
45 #endif /* LIBC_SCCS and not lint */
46 #include <sys/param.h>
47 __FBSDID("$FreeBSD$");
57 extern int __mb_sb_limit;
59 static size_t _EUC_mbrtowc_impl(wchar_t * __restrict, const char * __restrict,
60 size_t, mbstate_t * __restrict, uint8_t, uint8_t, uint8_t, uint8_t);
61 static size_t _EUC_wcrtomb_impl(char * __restrict, wchar_t,
62 mbstate_t * __restrict, uint8_t, uint8_t, uint8_t, uint8_t);
64 static size_t _EUC_CN_mbrtowc(wchar_t * __restrict, const char * __restrict,
65 size_t, mbstate_t * __restrict);
66 static size_t _EUC_JP_mbrtowc(wchar_t * __restrict, const char * __restrict,
67 size_t, mbstate_t * __restrict);
68 static size_t _EUC_KR_mbrtowc(wchar_t * __restrict, const char * __restrict,
69 size_t, mbstate_t * __restrict);
70 static size_t _EUC_TW_mbrtowc(wchar_t * __restrict, const char * __restrict,
71 size_t, mbstate_t * __restrict);
73 static size_t _EUC_CN_wcrtomb(char * __restrict, wchar_t,
74 mbstate_t * __restrict);
75 static size_t _EUC_JP_wcrtomb(char * __restrict, wchar_t,
76 mbstate_t * __restrict);
77 static size_t _EUC_KR_wcrtomb(char * __restrict, wchar_t,
78 mbstate_t * __restrict);
79 static size_t _EUC_TW_wcrtomb(char * __restrict, wchar_t,
80 mbstate_t * __restrict);
82 static size_t _EUC_CN_mbsnrtowcs(wchar_t * __restrict,
83 const char ** __restrict, size_t, size_t,
84 mbstate_t * __restrict);
85 static size_t _EUC_JP_mbsnrtowcs(wchar_t * __restrict,
86 const char ** __restrict, size_t, size_t,
87 mbstate_t * __restrict);
88 static size_t _EUC_KR_mbsnrtowcs(wchar_t * __restrict,
89 const char ** __restrict, size_t, size_t,
90 mbstate_t * __restrict);
91 static size_t _EUC_TW_mbsnrtowcs(wchar_t * __restrict,
92 const char ** __restrict, size_t, size_t,
93 mbstate_t * __restrict);
95 static size_t _EUC_CN_wcsnrtombs(char * __restrict,
96 const wchar_t ** __restrict, size_t, size_t,
97 mbstate_t * __restrict);
98 static size_t _EUC_JP_wcsnrtombs(char * __restrict,
99 const wchar_t ** __restrict, size_t, size_t,
100 mbstate_t * __restrict);
101 static size_t _EUC_KR_wcsnrtombs(char * __restrict,
102 const wchar_t ** __restrict, size_t, size_t,
103 mbstate_t * __restrict);
104 static size_t _EUC_TW_wcsnrtombs(char * __restrict,
105 const wchar_t ** __restrict, size_t, size_t,
106 mbstate_t * __restrict);
108 static int _EUC_mbsinit(const mbstate_t *);
117 _EUC_mbsinit(const mbstate_t *ps)
120 return (ps == NULL || ((const _EucState *)ps)->want == 0);
124 * EUC-CN uses CS0, CS1 and CS2 (4 bytes).
127 _EUC_CN_init(struct xlocale_ctype *l, _RuneLocale *rl)
129 l->__mbrtowc = _EUC_CN_mbrtowc;
130 l->__wcrtomb = _EUC_CN_wcrtomb;
131 l->__mbsnrtowcs = _EUC_CN_mbsnrtowcs;
132 l->__wcsnrtombs = _EUC_CN_wcsnrtombs;
133 l->__mbsinit = _EUC_mbsinit;
137 l->__mb_sb_limit = 128;
142 _EUC_CN_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s,
143 size_t n, mbstate_t * __restrict ps)
145 return (_EUC_mbrtowc_impl(pwc, s, n, ps, SS2, 4, 0, 0));
149 _EUC_CN_mbsnrtowcs(wchar_t * __restrict dst,
150 const char ** __restrict src,
151 size_t nms, size_t len, mbstate_t * __restrict ps)
153 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _EUC_CN_mbrtowc));
157 _EUC_CN_wcrtomb(char * __restrict s, wchar_t wc,
158 mbstate_t * __restrict ps)
160 return (_EUC_wcrtomb_impl(s, wc, ps, SS2, 4, 0, 0));
164 _EUC_CN_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
165 size_t nwc, size_t len, mbstate_t * __restrict ps)
167 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _EUC_CN_wcrtomb));
171 * EUC-KR uses only CS0 and CS1.
174 _EUC_KR_init(struct xlocale_ctype *l, _RuneLocale *rl)
176 l->__mbrtowc = _EUC_KR_mbrtowc;
177 l->__wcrtomb = _EUC_KR_wcrtomb;
178 l->__mbsnrtowcs = _EUC_KR_mbsnrtowcs;
179 l->__wcsnrtombs = _EUC_KR_wcsnrtombs;
180 l->__mbsinit = _EUC_mbsinit;
184 l->__mb_sb_limit = 128;
189 _EUC_KR_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s,
190 size_t n, mbstate_t * __restrict ps)
192 return (_EUC_mbrtowc_impl(pwc, s, n, ps, 0, 0, 0, 0));
196 _EUC_KR_mbsnrtowcs(wchar_t * __restrict dst,
197 const char ** __restrict src,
198 size_t nms, size_t len, mbstate_t * __restrict ps)
200 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _EUC_KR_mbrtowc));
204 _EUC_KR_wcrtomb(char * __restrict s, wchar_t wc,
205 mbstate_t * __restrict ps)
207 return (_EUC_wcrtomb_impl(s, wc, ps, 0, 0, 0, 0));
211 _EUC_KR_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
212 size_t nwc, size_t len, mbstate_t * __restrict ps)
214 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _EUC_KR_wcrtomb));
218 * EUC-JP uses CS0, CS1, CS2, and CS3.
221 _EUC_JP_init(struct xlocale_ctype *l, _RuneLocale *rl)
223 l->__mbrtowc = _EUC_JP_mbrtowc;
224 l->__wcrtomb = _EUC_JP_wcrtomb;
225 l->__mbsnrtowcs = _EUC_JP_mbsnrtowcs;
226 l->__wcsnrtombs = _EUC_JP_wcsnrtombs;
227 l->__mbsinit = _EUC_mbsinit;
231 l->__mb_sb_limit = 128;
236 _EUC_JP_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s,
237 size_t n, mbstate_t * __restrict ps)
239 return (_EUC_mbrtowc_impl(pwc, s, n, ps, SS2, 2, SS3, 3));
243 _EUC_JP_mbsnrtowcs(wchar_t * __restrict dst,
244 const char ** __restrict src,
245 size_t nms, size_t len, mbstate_t * __restrict ps)
247 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _EUC_JP_mbrtowc));
251 _EUC_JP_wcrtomb(char * __restrict s, wchar_t wc,
252 mbstate_t * __restrict ps)
254 return (_EUC_wcrtomb_impl(s, wc, ps, SS2, 2, SS3, 3));
258 _EUC_JP_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
259 size_t nwc, size_t len, mbstate_t * __restrict ps)
261 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _EUC_JP_wcrtomb));
265 * EUC-TW uses CS0, CS1, and CS2.
268 _EUC_TW_init(struct xlocale_ctype *l, _RuneLocale *rl)
270 l->__mbrtowc = _EUC_TW_mbrtowc;
271 l->__wcrtomb = _EUC_TW_wcrtomb;
272 l->__mbsnrtowcs = _EUC_TW_mbsnrtowcs;
273 l->__wcsnrtombs = _EUC_TW_wcsnrtombs;
274 l->__mbsinit = _EUC_mbsinit;
278 l->__mb_sb_limit = 128;
283 _EUC_TW_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s,
284 size_t n, mbstate_t * __restrict ps)
286 return (_EUC_mbrtowc_impl(pwc, s, n, ps, SS2, 4, 0, 0));
290 _EUC_TW_mbsnrtowcs(wchar_t * __restrict dst,
291 const char ** __restrict src,
292 size_t nms, size_t len, mbstate_t * __restrict ps)
294 return (__mbsnrtowcs_std(dst, src, nms, len, ps, _EUC_TW_mbrtowc));
298 _EUC_TW_wcrtomb(char * __restrict s, wchar_t wc,
299 mbstate_t * __restrict ps)
301 return (_EUC_wcrtomb_impl(s, wc, ps, SS2, 4, 0, 0));
305 _EUC_TW_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
306 size_t nwc, size_t len, mbstate_t * __restrict ps)
308 return (__wcsnrtombs_std(dst, src, nwc, len, ps, _EUC_TW_wcrtomb));
316 _EUC_mbrtowc_impl(wchar_t * __restrict pwc, const char * __restrict s,
317 size_t n, mbstate_t * __restrict ps,
318 uint8_t cs2, uint8_t cs2width, uint8_t cs3, uint8_t cs3width)
323 unsigned char ch, chs;
325 es = (_EucState *)ps;
327 if (es->want < 0 || es->want > MB_CUR_MAX) {
339 /* Incomplete multibyte sequence */
343 /* Fast path for plain ASCII (CS0) */
344 if (((ch = (unsigned char)*s) & 0x80) == 0) {
347 return (ch != '\0' ? 1 : 0);
353 } else if (ch == cs2) {
355 } else if (ch == cs3) {
370 for (i = 0; i < MIN(want, n); i++) {
377 /* Incomplete multibyte sequence */
386 return (wc == L'\0' ? 0 : want);
390 _EUC_wcrtomb_impl(char * __restrict s, wchar_t wc,
391 mbstate_t * __restrict ps,
392 uint8_t cs2, uint8_t cs2width, uint8_t cs3, uint8_t cs3width)
398 es = (_EucState *)ps;
406 /* Reset to initial shift state (no-op) */
409 if ((wc & ~0x7f) == 0) {
410 /* Fast path for plain ASCII (CS0) */
415 /* Determine the "length" */
416 if ((unsigned)wc > 0xffffff) {
418 } else if ((unsigned)wc > 0xffff) {
420 } else if ((unsigned)wc > 0xff) {
426 if (len > MB_CUR_MAX) {
431 /* This first check excludes CS1, which is implicitly valid. */
432 if ((wc < 0xa100) || (wc > 0xffff)) {
433 /* Check for valid CS2 or CS3 */
434 nm = (wc >> ((len - 1) * 8));
436 if (len != cs2width) {
440 } else if (nm == cs3) {
441 if (len != cs3width) {
451 /* Stash the bytes, least significant last */
452 for (i = len - 1; i >= 0; i--) {