138333Sphk/*- 2128004Stjr * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved. 338333Sphk * Copyright (c) 1993 438333Sphk * The Regents of the University of California. All rights reserved. 538333Sphk * 638333Sphk * This code is derived from software contributed to Berkeley by 738333Sphk * Paul Borman at Krystal Technologies. 838333Sphk * 9227753Stheraven * Copyright (c) 2011 The FreeBSD Foundation 10227753Stheraven * All rights reserved. 11227753Stheraven * Portions of this software were developed by David Chisnall 12227753Stheraven * under sponsorship from the FreeBSD Foundation. 13227753Stheraven * 1438333Sphk * Redistribution and use in source and binary forms, with or without 1538333Sphk * modification, are permitted provided that the following conditions 1638333Sphk * are met: 1738333Sphk * 1. Redistributions of source code must retain the above copyright 1838333Sphk * notice, this list of conditions and the following disclaimer. 1938333Sphk * 2. Redistributions in binary form must reproduce the above copyright 2038333Sphk * notice, this list of conditions and the following disclaimer in the 2138333Sphk * documentation and/or other materials provided with the distribution. 2238333Sphk * 3. All advertising materials mentioning features or use of this software 2338333Sphk * must display the following acknowledgement: 2438333Sphk * This product includes software developed by the University of 2538333Sphk * California, Berkeley and its contributors. 2638333Sphk * 4. Neither the name of the University nor the names of its contributors 2738333Sphk * may be used to endorse or promote products derived from this software 2838333Sphk * without specific prior written permission. 2938333Sphk * 3038333Sphk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 3138333Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 3238333Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3338333Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 3438333Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3538333Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3638333Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3738333Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3838333Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3938333Sphk * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 4038333Sphk * SUCH DAMAGE. 4138333Sphk */ 4238333Sphk 4338333Sphk#if defined(LIBC_SCCS) && !defined(lint) 4438333Sphkstatic char sccsid[] = "@(#)big5.c 8.1 (Berkeley) 6/4/93"; 4538333Sphk#endif /* LIBC_SCCS and not lint */ 46142654Sphantom#include <sys/cdefs.h> 4792986Sobrien__FBSDID("$FreeBSD$"); 4838333Sphk 49142654Sphantom#include <sys/types.h> 50128155Stjr#include <errno.h> 51121893Stjr#include <runetype.h> 5238333Sphk#include <stdlib.h> 53128004Stjr#include <string.h> 54121893Stjr#include <wchar.h> 55129153Stjr#include "mblocal.h" 5638333Sphk 57172619Sacheextern int __mb_sb_limit; 58172619Sache 59142654Sphantomstatic size_t _BIG5_mbrtowc(wchar_t * __restrict, const char * __restrict, 60142654Sphantom size_t, mbstate_t * __restrict); 61142654Sphantomstatic int _BIG5_mbsinit(const mbstate_t *); 62142654Sphantomstatic size_t _BIG5_wcrtomb(char * __restrict, wchar_t, 63142654Sphantom mbstate_t * __restrict); 64121893Stjr 65128004Stjrtypedef struct { 66129334Stjr wchar_t ch; 67128004Stjr} _BIG5State; 68128004Stjr 6938333Sphkint 70227753Stheraven_BIG5_init(struct xlocale_ctype *l, _RuneLocale *rl) 7138333Sphk{ 72121893Stjr 73227753Stheraven l->__mbrtowc = _BIG5_mbrtowc; 74227753Stheraven l->__wcrtomb = _BIG5_wcrtomb; 75227753Stheraven l->__mbsinit = _BIG5_mbsinit; 76227753Stheraven l->runes = rl; 77227753Stheraven l->__mb_cur_max = 2; 78227753Stheraven l->__mb_sb_limit = 128; 7938333Sphk return (0); 8038333Sphk} 8138333Sphk 82142654Sphantomstatic int 83128004Stjr_BIG5_mbsinit(const mbstate_t *ps) 84128004Stjr{ 85128004Stjr 86129334Stjr return (ps == NULL || ((const _BIG5State *)ps)->ch == 0); 87128004Stjr} 88128004Stjr 89121893Stjrstatic __inline int 90121893Stjr_big5_check(u_int c) 9138333Sphk{ 92121893Stjr 9338333Sphk c &= 0xff; 9438333Sphk return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1); 9538333Sphk} 9638333Sphk 97142654Sphantomstatic size_t 98121893Stjr_BIG5_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, 99128004Stjr mbstate_t * __restrict ps) 10038333Sphk{ 101128004Stjr _BIG5State *bs; 102121893Stjr wchar_t wc; 103129334Stjr size_t len; 10438333Sphk 105128004Stjr bs = (_BIG5State *)ps; 106128004Stjr 107129334Stjr if ((bs->ch & ~0xFF) != 0) { 108129334Stjr /* Bad conversion state. */ 109128155Stjr errno = EINVAL; 110128155Stjr return ((size_t)-1); 111128155Stjr } 112128155Stjr 113128004Stjr if (s == NULL) { 114128004Stjr s = ""; 115128004Stjr n = 1; 116128004Stjr pwc = NULL; 117128004Stjr } 118128004Stjr 119129334Stjr if (n == 0) 120121893Stjr /* Incomplete multibyte sequence */ 121121893Stjr return ((size_t)-2); 122129334Stjr 123129334Stjr if (bs->ch != 0) { 124129334Stjr if (*s == '\0') { 125129334Stjr errno = EILSEQ; 126129334Stjr return ((size_t)-1); 127129334Stjr } 128129334Stjr wc = (bs->ch << 8) | (*s & 0xFF); 129129334Stjr if (pwc != NULL) 130129334Stjr *pwc = wc; 131129334Stjr bs->ch = 0; 132129334Stjr return (1); 133129117Stjr } 134129334Stjr 135129334Stjr len = (size_t)_big5_check(*s); 136129334Stjr wc = *s++ & 0xff; 137129334Stjr if (len == 2) { 138129334Stjr if (n < 2) { 139129334Stjr /* Incomplete multibyte sequence */ 140129334Stjr bs->ch = wc; 141129334Stjr return ((size_t)-2); 142129334Stjr } 143129334Stjr if (*s == '\0') { 144129334Stjr errno = EILSEQ; 145129334Stjr return ((size_t)-1); 146129334Stjr } 147129334Stjr wc = (wc << 8) | (*s++ & 0xff); 148129334Stjr if (pwc != NULL) 149129334Stjr *pwc = wc; 150129334Stjr return (2); 151129334Stjr } else { 152129334Stjr if (pwc != NULL) 153129334Stjr *pwc = wc; 154129334Stjr return (wc == L'\0' ? 0 : 1); 155129334Stjr } 15638333Sphk} 15738333Sphk 158142654Sphantomstatic size_t 159128155Stjr_BIG5_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps) 16038333Sphk{ 161128155Stjr _BIG5State *bs; 162121893Stjr 163128155Stjr bs = (_BIG5State *)ps; 164128155Stjr 165129334Stjr if (bs->ch != 0) { 166128155Stjr errno = EINVAL; 167128155Stjr return ((size_t)-1); 168128155Stjr } 169128155Stjr 170121893Stjr if (s == NULL) 171121893Stjr /* Reset to initial shift state (no-op) */ 172121893Stjr return (1); 173121893Stjr if (wc & 0x8000) { 174121893Stjr *s++ = (wc >> 8) & 0xff; 175121893Stjr *s = wc & 0xff; 176121893Stjr return (2); 17738333Sphk } 178121893Stjr *s = wc & 0xff; 179121893Stjr return (1); 18038333Sphk} 181