Libc-498.tar.gz

[apple/libc.git] / locale / big5-fbsd.c

diff --git a/locale/big5-fbsd.c b/locale/big5-fbsd.c
new file mode 100644 (file)
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--- /dev/null
+++ b/locale/big5-fbsd.c
@@ -0,0 +1,172 @@
+/*-
+ * 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.
+ *
+ * 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[] = "@(#)big5.c     8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/param.h>
+__FBSDID("$FreeBSD: src/lib/libc/locale/big5.c,v 1.16 2004/05/17 11:16:14 tjr Exp $");
+
+#include "xlocale_private.h"
+
+#include <errno.h>
+#include <runetype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include "mblocal.h"
+
+__private_extern__ int _BIG5_init(struct __xlocale_st_runelocale *);
+static size_t  _BIG5_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
+           mbstate_t * __restrict, locale_t);
+static int     _BIG5_mbsinit(const mbstate_t *, locale_t);
+static size_t  _BIG5_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict, locale_t);
+
+typedef struct {
+       wchar_t ch;
+} _BIG5State;
+
+__private_extern__ int
+_BIG5_init(struct __xlocale_st_runelocale *xrl)
+{
+
+       xrl->__mbrtowc = _BIG5_mbrtowc;
+       xrl->__wcrtomb = _BIG5_wcrtomb;
+       xrl->__mbsinit = _BIG5_mbsinit;
+       xrl->__mb_cur_max = 2;
+       return (0);
+}
+
+static int
+_BIG5_mbsinit(const mbstate_t *ps, locale_t loc)
+{
+
+       return (ps == NULL || ((const _BIG5State *)ps)->ch == 0);
+}
+
+static __inline int
+_big5_check(u_int c)
+{
+
+       c &= 0xff;
+       return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1);
+}
+
+static size_t
+_BIG5_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
+    mbstate_t * __restrict ps, locale_t loc)
+{
+       _BIG5State *bs;
+       wchar_t wc;
+       size_t len;
+
+       bs = (_BIG5State *)ps;
+
+       if ((bs->ch & ~0xFF) != 0) {
+               /* Bad conversion state. */
+               errno = EINVAL;
+               return ((size_t)-1);
+       }
+
+       if (s == NULL) {
+               s = "";
+               n = 1;
+               pwc = NULL;
+       }
+
+       if (n == 0)
+               /* Incomplete multibyte sequence */
+               return ((size_t)-2);
+
+       if (bs->ch != 0) {
+               if (*s == '\0') {
+                       errno = EILSEQ;
+                       return ((size_t)-1);
+               }
+               wc = (bs->ch << 8) | (*s & 0xFF);
+               if (pwc != NULL)
+                       *pwc = wc;
+               bs->ch = 0;
+               return (1);
+       }
+
+       len = (size_t)_big5_check(*s);
+       wc = *s++ & 0xff;
+       if (len == 2) {
+               if (n < 2) {
+                       /* Incomplete multibyte sequence */
+                       bs->ch = wc;
+                       return ((size_t)-2);
+               }
+               if (*s == '\0') {
+                       errno = EILSEQ;
+                       return ((size_t)-1);
+               }
+               wc = (wc << 8) | (*s++ & 0xff);
+               if (pwc != NULL)
+                       *pwc = wc;
+                return (2);
+       } else {
+               if (pwc != NULL)
+                       *pwc = wc;
+               return (wc == L'\0' ? 0 : 1);
+       }
+}
+
+static size_t
+_BIG5_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps, locale_t loc)
+{
+       _BIG5State *bs;
+
+       bs = (_BIG5State *)ps;
+
+       if (bs->ch != 0) {
+               errno = EINVAL;
+               return ((size_t)-1);
+       }
+
+       if (s == NULL)
+               /* Reset to initial shift state (no-op) */
+               return (1);
+       if (wc & 0x8000) {
+               *s++ = (wc >> 8) & 0xff;
+               *s = wc & 0xff;
+               return (2);
+       }
+       *s = wc & 0xff;
+       return (1);
+}