0f6ef690b3
load of _l suffixed versions of various standard library functions that use the global locale, making them take an explicit locale parameter. Also adds support for per-thread locales. This work was funded by the FreeBSD Foundation. Please test any code you have that uses the C standard locale functions! Reviewed by: das (gdtoa changes) Approved by: dim (mentor)
274 lines
6.5 KiB
C
274 lines
6.5 KiB
C
/*-
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* Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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*
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* Copyright (c) 2011 The FreeBSD Foundation
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* All rights reserved.
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)euc.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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__FBSDID("$FreeBSD$");
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#include <errno.h>
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#include <limits.h>
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#include <runetype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include "mblocal.h"
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extern int __mb_sb_limit;
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static size_t _EUC_mbrtowc(wchar_t * __restrict, const char * __restrict,
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size_t, mbstate_t * __restrict);
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static int _EUC_mbsinit(const mbstate_t *);
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static size_t _EUC_wcrtomb(char * __restrict, wchar_t,
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mbstate_t * __restrict);
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typedef struct {
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int count[4];
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wchar_t bits[4];
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wchar_t mask;
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} _EucInfo;
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typedef struct {
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wchar_t ch;
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int set;
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int want;
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} _EucState;
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int
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_EUC_init(struct xlocale_ctype *l, _RuneLocale *rl)
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{
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_EucInfo *ei;
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int x, new__mb_cur_max;
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char *v, *e;
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if (rl->__variable == NULL)
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return (EFTYPE);
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v = (char *)rl->__variable;
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while (*v == ' ' || *v == '\t')
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++v;
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if ((ei = malloc(sizeof(_EucInfo))) == NULL)
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return (errno == 0 ? ENOMEM : errno);
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new__mb_cur_max = 0;
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for (x = 0; x < 4; ++x) {
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ei->count[x] = (int)strtol(v, &e, 0);
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if (v == e || !(v = e)) {
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free(ei);
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return (EFTYPE);
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}
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if (new__mb_cur_max < ei->count[x])
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new__mb_cur_max = ei->count[x];
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while (*v == ' ' || *v == '\t')
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++v;
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ei->bits[x] = (int)strtol(v, &e, 0);
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if (v == e || !(v = e)) {
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free(ei);
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return (EFTYPE);
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}
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while (*v == ' ' || *v == '\t')
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++v;
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}
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ei->mask = (int)strtol(v, &e, 0);
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if (v == e || !(v = e)) {
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free(ei);
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return (EFTYPE);
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}
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rl->__variable = ei;
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rl->__variable_len = sizeof(_EucInfo);
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l->runes = rl;
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l->__mb_cur_max = new__mb_cur_max;
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l->__mbrtowc = _EUC_mbrtowc;
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l->__wcrtomb = _EUC_wcrtomb;
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l->__mbsinit = _EUC_mbsinit;
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l->__mb_sb_limit = 256;
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return (0);
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}
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static int
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_EUC_mbsinit(const mbstate_t *ps)
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{
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return (ps == NULL || ((const _EucState *)ps)->want == 0);
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}
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#define CEI ((_EucInfo *)(_CurrentRuneLocale->__variable))
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#define _SS2 0x008e
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#define _SS3 0x008f
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#define GR_BITS 0x80808080 /* XXX: to be fixed */
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static __inline int
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_euc_set(u_int c)
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{
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c &= 0xff;
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return ((c & 0x80) ? c == _SS3 ? 3 : c == _SS2 ? 2 : 1 : 0);
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}
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static size_t
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_EUC_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
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mbstate_t * __restrict ps)
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{
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_EucState *es;
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int i, set, want;
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wchar_t wc;
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const char *os;
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es = (_EucState *)ps;
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if (es->want < 0 || es->want > MB_CUR_MAX || es->set < 0 ||
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es->set > 3) {
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errno = EINVAL;
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return ((size_t)-1);
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}
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if (s == NULL) {
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s = "";
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n = 1;
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pwc = NULL;
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}
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if (n == 0)
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/* Incomplete multibyte sequence */
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return ((size_t)-2);
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os = s;
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if (es->want == 0) {
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want = CEI->count[set = _euc_set(*s)];
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if (set == 2 || set == 3) {
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--want;
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if (--n == 0) {
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/* Incomplete multibyte sequence */
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es->set = set;
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es->want = want;
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es->ch = 0;
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return ((size_t)-2);
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}
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++s;
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if (*s == '\0') {
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errno = EILSEQ;
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return ((size_t)-1);
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}
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}
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wc = (unsigned char)*s++;
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} else {
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set = es->set;
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want = es->want;
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wc = es->ch;
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}
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for (i = (es->want == 0) ? 1 : 0; i < MIN(want, n); i++) {
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if (*s == '\0') {
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errno = EILSEQ;
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return ((size_t)-1);
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}
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wc = (wc << 8) | (unsigned char)*s++;
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}
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if (i < want) {
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/* Incomplete multibyte sequence */
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es->set = set;
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es->want = want - i;
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es->ch = wc;
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return ((size_t)-2);
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}
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wc = (wc & ~CEI->mask) | CEI->bits[set];
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if (pwc != NULL)
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*pwc = wc;
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es->want = 0;
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return (wc == L'\0' ? 0 : s - os);
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}
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static size_t
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_EUC_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
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{
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_EucState *es;
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wchar_t m, nm;
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int i, len;
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es = (_EucState *)ps;
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if (es->want != 0) {
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errno = EINVAL;
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return ((size_t)-1);
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}
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if (s == NULL)
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/* Reset to initial shift state (no-op) */
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return (1);
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m = wc & CEI->mask;
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nm = wc & ~m;
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if (m == CEI->bits[1]) {
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CodeSet1:
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/* Codeset 1: The first byte must have 0x80 in it. */
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i = len = CEI->count[1];
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while (i-- > 0)
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*s++ = (nm >> (i << 3)) | 0x80;
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} else {
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if (m == CEI->bits[0])
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i = len = CEI->count[0];
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else if (m == CEI->bits[2]) {
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i = len = CEI->count[2];
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*s++ = _SS2;
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--i;
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/* SS2 designates G2 into GR */
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nm |= GR_BITS;
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} else if (m == CEI->bits[3]) {
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i = len = CEI->count[3];
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*s++ = _SS3;
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--i;
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/* SS3 designates G3 into GR */
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nm |= GR_BITS;
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} else
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goto CodeSet1; /* Bletch */
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while (i-- > 0)
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*s++ = (nm >> (i << 3)) & 0xff;
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}
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return (len);
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}
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