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e94c6cb4a2
. Replace inclusion of sys/param.h to sys/cdefs.h and sys/types.h where appropriate. . move _*_init() prototypes to mblocal.h, and remove these prototypes from .c files . use _none_init() in __setrunelocale() instead of duplicating code . move __mb* variables from table.c to none.c allowing us to not to export _none_*() externs, and appropriately remove them from mblocal.h Ok'ed by: tjr
219 lines
5.1 KiB
C
219 lines
5.1 KiB
C
/*-
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* Copyright (c) 2002-2004 Tim J. Robbins
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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/*
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* PRC National Standard GB 18030-2000 encoding of Chinese text.
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*
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* See gb18030(5) for details.
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*/
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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 <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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static size_t _GB18030_mbrtowc(wchar_t * __restrict, const char * __restrict,
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size_t, mbstate_t * __restrict);
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static int _GB18030_mbsinit(const mbstate_t *);
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static size_t _GB18030_wcrtomb(char * __restrict, wchar_t,
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mbstate_t * __restrict);
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typedef struct {
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int count;
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u_char bytes[4];
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} _GB18030State;
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int
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_GB18030_init(_RuneLocale *rl)
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{
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__mbrtowc = _GB18030_mbrtowc;
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__wcrtomb = _GB18030_wcrtomb;
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__mbsinit = _GB18030_mbsinit;
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_CurrentRuneLocale = rl;
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__mb_cur_max = 4;
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return (0);
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}
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static int
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_GB18030_mbsinit(const mbstate_t *ps)
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{
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return (ps == NULL || ((const _GB18030State *)ps)->count == 0);
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}
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static size_t
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_GB18030_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s,
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size_t n, mbstate_t * __restrict ps)
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{
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_GB18030State *gs;
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wchar_t wch;
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int ch, len, ocount;
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size_t ncopy;
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gs = (_GB18030State *)ps;
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if (gs->count < 0 || gs->count > sizeof(gs->bytes)) {
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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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ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof(gs->bytes) - gs->count);
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memcpy(gs->bytes + gs->count, s, ncopy);
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ocount = gs->count;
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gs->count += ncopy;
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s = (char *)gs->bytes;
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n = gs->count;
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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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/*
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* Single byte: [00-7f]
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* Two byte: [81-fe][40-7e,80-fe]
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* Four byte: [81-fe][30-39][81-fe][30-39]
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*/
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ch = (unsigned char)*s++;
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if (ch <= 0x7f) {
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len = 1;
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wch = ch;
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} else if (ch >= 0x81 && ch <= 0xfe) {
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wch = ch;
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if (n < 2)
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return ((size_t)-2);
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ch = (unsigned char)*s++;
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if ((ch >= 0x40 && ch <= 0x7e) || (ch >= 0x80 && ch <= 0xfe)) {
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wch = (wch << 8) | ch;
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len = 2;
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} else if (ch >= 0x30 && ch <= 0x39) {
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/*
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* Strip high bit off the wide character we will
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* eventually output so that it is positive when
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* cast to wint_t on 32-bit twos-complement machines.
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*/
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wch = ((wch & 0x7f) << 8) | ch;
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if (n < 3)
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return ((size_t)-2);
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ch = (unsigned char)*s++;
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if (ch < 0x81 || ch > 0xfe)
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goto ilseq;
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wch = (wch << 8) | ch;
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if (n < 4)
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return ((size_t)-2);
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ch = (unsigned char)*s++;
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if (ch < 0x30 || ch > 0x39)
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goto ilseq;
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wch = (wch << 8) | ch;
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len = 4;
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} else
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goto ilseq;
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} else
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goto ilseq;
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if (pwc != NULL)
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*pwc = wch;
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gs->count = 0;
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return (wch == L'\0' ? 0 : len - ocount);
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ilseq:
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errno = EILSEQ;
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return ((size_t)-1);
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}
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static size_t
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_GB18030_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
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{
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_GB18030State *gs;
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size_t len;
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int c;
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gs = (_GB18030State *)ps;
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if (gs->count != 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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if ((wc & ~0x7fffffff) != 0)
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goto ilseq;
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if (wc & 0x7f000000) {
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/* Replace high bit that mbrtowc() removed. */
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wc |= 0x80000000;
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c = (wc >> 24) & 0xff;
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if (c < 0x81 || c > 0xfe)
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goto ilseq;
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*s++ = c;
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c = (wc >> 16) & 0xff;
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if (c < 0x30 || c > 0x39)
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goto ilseq;
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*s++ = c;
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c = (wc >> 8) & 0xff;
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if (c < 0x81 || c > 0xfe)
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goto ilseq;
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*s++ = c;
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c = wc & 0xff;
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if (c < 0x30 || c > 0x39)
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goto ilseq;
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*s++ = c;
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len = 4;
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} else if (wc & 0x00ff0000)
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goto ilseq;
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else if (wc & 0x0000ff00) {
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c = (wc >> 8) & 0xff;
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if (c < 0x81 || c > 0xfe)
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goto ilseq;
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*s++ = c;
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c = wc & 0xff;
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if (c < 0x40 || c == 0x7f || c == 0xff)
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goto ilseq;
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*s++ = c;
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len = 2;
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} else if (wc <= 0x7f) {
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*s++ = wc;
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len = 1;
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} else
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goto ilseq;
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return (len);
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ilseq:
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errno = EILSEQ;
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return ((size_t)-1);
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}
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