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-rw-r--r--lib/libc/locale/euc.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/lib/libc/locale/euc.c b/lib/libc/locale/euc.c
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+++ b/lib/libc/locale/euc.c
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+/*-
+ * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
+ * Copyright (c) 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Paul Borman at Krystal Technologies.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)euc.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/param.h>
+__FBSDID("$FreeBSD$");
+
+#include <errno.h>
+#include <limits.h>
+#include <runetype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include "mblocal.h"
+
+extern int __mb_sb_limit;
+
+static size_t _EUC_mbrtowc(wchar_t * __restrict, const char * __restrict,
+ size_t, mbstate_t * __restrict);
+static int _EUC_mbsinit(const mbstate_t *);
+static size_t _EUC_wcrtomb(char * __restrict, wchar_t,
+ mbstate_t * __restrict);
+
+typedef struct {
+ int count[4];
+ wchar_t bits[4];
+ wchar_t mask;
+} _EucInfo;
+
+typedef struct {
+ wchar_t ch;
+ int set;
+ int want;
+} _EucState;
+
+int
+_EUC_init(struct xlocale_ctype *l, _RuneLocale *rl)
+{
+ _EucInfo *ei;
+ int x, new__mb_cur_max;
+ char *v, *e;
+
+ if (rl->__variable == NULL)
+ return (EFTYPE);
+
+ v = (char *)rl->__variable;
+
+ while (*v == ' ' || *v == '\t')
+ ++v;
+
+ if ((ei = malloc(sizeof(_EucInfo))) == NULL)
+ return (errno == 0 ? ENOMEM : errno);
+
+ new__mb_cur_max = 0;
+ for (x = 0; x < 4; ++x) {
+ ei->count[x] = (int)strtol(v, &e, 0);
+ if (v == e || !(v = e)) {
+ free(ei);
+ return (EFTYPE);
+ }
+ if (new__mb_cur_max < ei->count[x])
+ new__mb_cur_max = ei->count[x];
+ while (*v == ' ' || *v == '\t')
+ ++v;
+ ei->bits[x] = (int)strtol(v, &e, 0);
+ if (v == e || !(v = e)) {
+ free(ei);
+ return (EFTYPE);
+ }
+ while (*v == ' ' || *v == '\t')
+ ++v;
+ }
+ ei->mask = (int)strtol(v, &e, 0);
+ if (v == e || !(v = e)) {
+ free(ei);
+ return (EFTYPE);
+ }
+ rl->__variable = ei;
+ rl->__variable_len = sizeof(_EucInfo);
+ l->runes = rl;
+ l->__mb_cur_max = new__mb_cur_max;
+ l->__mbrtowc = _EUC_mbrtowc;
+ l->__wcrtomb = _EUC_wcrtomb;
+ l->__mbsinit = _EUC_mbsinit;
+ l->__mb_sb_limit = 256;
+ return (0);
+}
+
+static int
+_EUC_mbsinit(const mbstate_t *ps)
+{
+
+ return (ps == NULL || ((const _EucState *)ps)->want == 0);
+}
+
+#define CEI ((_EucInfo *)(_CurrentRuneLocale->__variable))
+
+#define _SS2 0x008e
+#define _SS3 0x008f
+
+#define GR_BITS 0x80808080 /* XXX: to be fixed */
+
+static __inline int
+_euc_set(u_int c)
+{
+
+ c &= 0xff;
+ return ((c & 0x80) ? c == _SS3 ? 3 : c == _SS2 ? 2 : 1 : 0);
+}
+
+static size_t
+_EUC_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
+ mbstate_t * __restrict ps)
+{
+ _EucState *es;
+ int i, set, want;
+ wchar_t wc;
+ const char *os;
+
+ es = (_EucState *)ps;
+
+ if (es->want < 0 || es->want > MB_CUR_MAX || es->set < 0 ||
+ es->set > 3) {
+ errno = EINVAL;
+ return ((size_t)-1);
+ }
+
+ if (s == NULL) {
+ s = "";
+ n = 1;
+ pwc = NULL;
+ }
+
+ if (n == 0)
+ /* Incomplete multibyte sequence */
+ return ((size_t)-2);
+
+ os = s;
+
+ if (es->want == 0) {
+ want = CEI->count[set = _euc_set(*s)];
+ if (set == 2 || set == 3) {
+ --want;
+ if (--n == 0) {
+ /* Incomplete multibyte sequence */
+ es->set = set;
+ es->want = want;
+ es->ch = 0;
+ return ((size_t)-2);
+ }
+ ++s;
+ if (*s == '\0') {
+ errno = EILSEQ;
+ return ((size_t)-1);
+ }
+ }
+ wc = (unsigned char)*s++;
+ } else {
+ set = es->set;
+ want = es->want;
+ wc = es->ch;
+ }
+ for (i = (es->want == 0) ? 1 : 0; i < MIN(want, n); i++) {
+ if (*s == '\0') {
+ errno = EILSEQ;
+ return ((size_t)-1);
+ }
+ wc = (wc << 8) | (unsigned char)*s++;
+ }
+ if (i < want) {
+ /* Incomplete multibyte sequence */
+ es->set = set;
+ es->want = want - i;
+ es->ch = wc;
+ return ((size_t)-2);
+ }
+ wc = (wc & ~CEI->mask) | CEI->bits[set];
+ if (pwc != NULL)
+ *pwc = wc;
+ es->want = 0;
+ return (wc == L'\0' ? 0 : s - os);
+}
+
+static size_t
+_EUC_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
+{
+ _EucState *es;
+ wchar_t m, nm;
+ int i, len;
+
+ es = (_EucState *)ps;
+
+ if (es->want != 0) {
+ errno = EINVAL;
+ return ((size_t)-1);
+ }
+
+ if (s == NULL)
+ /* Reset to initial shift state (no-op) */
+ return (1);
+
+ m = wc & CEI->mask;
+ nm = wc & ~m;
+
+ if (m == CEI->bits[1]) {
+CodeSet1:
+ /* Codeset 1: The first byte must have 0x80 in it. */
+ i = len = CEI->count[1];
+ while (i-- > 0)
+ *s++ = (nm >> (i << 3)) | 0x80;
+ } else {
+ if (m == CEI->bits[0])
+ i = len = CEI->count[0];
+ else if (m == CEI->bits[2]) {
+ i = len = CEI->count[2];
+ *s++ = _SS2;
+ --i;
+ /* SS2 designates G2 into GR */
+ nm |= GR_BITS;
+ } else if (m == CEI->bits[3]) {
+ i = len = CEI->count[3];
+ *s++ = _SS3;
+ --i;
+ /* SS3 designates G3 into GR */
+ nm |= GR_BITS;
+ } else
+ goto CodeSet1; /* Bletch */
+ while (i-- > 0)
+ *s++ = (nm >> (i << 3)) & 0xff;
+ }
+ return (len);
+}
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