diff options
Diffstat (limited to 'lib/libc/locale/big5.c')
| -rw-r--r-- | lib/libc/locale/big5.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/lib/libc/locale/big5.c b/lib/libc/locale/big5.c new file mode 100644 index 0000000..4b37265 --- /dev/null +++ b/lib/libc/locale/big5.c @@ -0,0 +1,180 @@ +/*- + * 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[] = "@(#)big5.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <errno.h> +#include <runetype.h> +#include <stdlib.h> +#include <string.h> +#include <wchar.h> +#include "mblocal.h" + +extern int __mb_sb_limit; + +static size_t _BIG5_mbrtowc(wchar_t * __restrict, const char * __restrict, + size_t, mbstate_t * __restrict); +static int _BIG5_mbsinit(const mbstate_t *); +static size_t _BIG5_wcrtomb(char * __restrict, wchar_t, + mbstate_t * __restrict); + +typedef struct { + wchar_t ch; +} _BIG5State; + +int +_BIG5_init(struct xlocale_ctype *l, _RuneLocale *rl) +{ + + l->__mbrtowc = _BIG5_mbrtowc; + l->__wcrtomb = _BIG5_wcrtomb; + l->__mbsinit = _BIG5_mbsinit; + l->runes = rl; + l->__mb_cur_max = 2; + l->__mb_sb_limit = 128; + return (0); +} + +static int +_BIG5_mbsinit(const mbstate_t *ps) +{ + + 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) +{ + _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) +{ + _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); +} |
