diff options
Diffstat (limited to 'lib/libc/locale/gb2312.c')
| -rw-r--r-- | lib/libc/locale/gb2312.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/lib/libc/locale/gb2312.c b/lib/libc/locale/gb2312.c new file mode 100644 index 0000000..5fbc07d --- /dev/null +++ b/lib/libc/locale/gb2312.c @@ -0,0 +1,160 @@ +/*- + * Copyright (c) 2004 Tim J. Robbins. All rights reserved. + * Copyright (c) 2003 David Xu <davidxu@freebsd.org> + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#include <sys/param.h> +__FBSDID("$FreeBSD$"); + +#include <errno.h> +#include <runetype.h> +#include <stdlib.h> +#include <string.h> +#include <wchar.h> +#include "mblocal.h" + +static size_t _GB2312_mbrtowc(wchar_t * __restrict, const char * __restrict, + size_t, mbstate_t * __restrict); +static int _GB2312_mbsinit(const mbstate_t *); +static size_t _GB2312_wcrtomb(char * __restrict, wchar_t, + mbstate_t * __restrict); + +typedef struct { + int count; + u_char bytes[2]; +} _GB2312State; + +int +_GB2312_init(struct xlocale_ctype *l, _RuneLocale *rl) +{ + + l->runes = rl; + l->__mbrtowc = _GB2312_mbrtowc; + l->__wcrtomb = _GB2312_wcrtomb; + l->__mbsinit = _GB2312_mbsinit; + l->__mb_cur_max = 2; + l->__mb_sb_limit = 128; + return (0); +} + +static int +_GB2312_mbsinit(const mbstate_t *ps) +{ + + return (ps == NULL || ((const _GB2312State *)ps)->count == 0); +} + +static __inline int +_GB2312_check(const char *str, size_t n) +{ + const u_char *s = (const u_char *)str; + + if (n == 0) + /* Incomplete multibyte sequence */ + return (-2); + if (s[0] >= 0xa1 && s[0] <= 0xfe) { + if (n < 2) + /* Incomplete multibyte sequence */ + return (-2); + if (s[1] < 0xa1 || s[1] > 0xfe) + /* Invalid multibyte sequence */ + return (-1); + return (2); + } else if (s[0] & 0x80) { + /* Invalid multibyte sequence */ + return (-1); + } + return (1); +} + +static size_t +_GB2312_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n, + mbstate_t * __restrict ps) +{ + _GB2312State *gs; + wchar_t wc; + int i, len, ocount; + size_t ncopy; + + gs = (_GB2312State *)ps; + + if (gs->count < 0 || gs->count > sizeof(gs->bytes)) { + errno = EINVAL; + return ((size_t)-1); + } + + if (s == NULL) { + s = ""; + n = 1; + pwc = NULL; + } + + ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof(gs->bytes) - gs->count); + memcpy(gs->bytes + gs->count, s, ncopy); + ocount = gs->count; + gs->count += ncopy; + s = (char *)gs->bytes; + n = gs->count; + + if ((len = _GB2312_check(s, n)) < 0) + return ((size_t)len); + wc = 0; + i = len; + while (i-- > 0) + wc = (wc << 8) | (unsigned char)*s++; + if (pwc != NULL) + *pwc = wc; + gs->count = 0; + return (wc == L'\0' ? 0 : len - ocount); +} + +static size_t +_GB2312_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps) +{ + _GB2312State *gs; + + gs = (_GB2312State *)ps; + + if (gs->count != 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); +} |
