360 lines
8.8 KiB
C
360 lines
8.8 KiB
C
/* $NetBSD: citrus_utf8.c,v 1.6 2002/03/28 10:53:49 yamt Exp $ */
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/*-
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* Copyright (c)2002 Citrus Project,
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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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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: citrus_utf8.c,v 1.6 2002/03/28 10:53:49 yamt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <locale.h>
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#include <wchar.h>
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#include <sys/types.h>
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#include <limits.h>
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#include "citrus_module.h"
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#include "citrus_ctype.h"
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#include "citrus_utf8.h"
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/* ----------------------------------------------------------------------
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* private stuffs used by templates
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*/
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static int _UTF8_count_array[256];
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static int const *_UTF8_count = NULL;
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static u_int32_t _UTF8_range[] = {
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0, /*dummy*/
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0x00000000, 0x00000080, 0x00000800, 0x00010000,
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0x00200000, 0x04000000, 0x80000000,
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};
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typedef struct {
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char ch[6];
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int chlen;
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} _UTF8State;
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typedef struct {
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} _UTF8EncodingInfo;
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typedef struct {
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_UTF8EncodingInfo ei;
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struct {
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/* for future multi-locale facility */
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_UTF8State s_mblen;
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_UTF8State s_mbrlen;
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_UTF8State s_mbrtowc;
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_UTF8State s_mbtowc;
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_UTF8State s_mbsrtowcs;
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_UTF8State s_wcrtomb;
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_UTF8State s_wcsrtombs;
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_UTF8State s_wctomb;
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} states;
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} _UTF8CTypeInfo;
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#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
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#define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_
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#define _FUNCNAME(m) _citrus_UTF8_##m
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#define _ENCODING_INFO _UTF8EncodingInfo
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#define _CTYPE_INFO _UTF8CTypeInfo
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#define _ENCODING_STATE _UTF8State
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#define _ENCODING_MB_CUR_MAX(_ei_) 6
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#define _ENCODING_IS_STATE_DEPENDENT 0
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#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
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static __inline void
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_UTF8_init_count(void)
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{
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int i;
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if (!_UTF8_count) {
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memset(_UTF8_count_array, 0, sizeof(_UTF8_count_array));
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for (i = 0; i <= 0x7f; i++)
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_UTF8_count_array[i] = 1;
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for (i = 0xc0; i <= 0xdf; i++)
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_UTF8_count_array[i] = 2;
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for (i = 0xe0; i <= 0xef; i++)
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_UTF8_count_array[i] = 3;
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for (i = 0xf0; i <= 0xf7; i++)
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_UTF8_count_array[i] = 4;
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for (i = 0xf8; i <= 0xfb; i++)
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_UTF8_count_array[i] = 5;
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for (i = 0xfc; i <= 0xfd; i++)
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_UTF8_count_array[i] = 6;
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_UTF8_count = _UTF8_count_array;
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}
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}
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static int
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_UTF8_findlen(wchar_t v)
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{
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int i;
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u_int32_t c;
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c = (u_int32_t)v; /*XXX*/
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for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]); i++)
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if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1])
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return i;
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return -1; /*out of range*/
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_UTF8_init_state(_UTF8EncodingInfo *ei, _UTF8State *s)
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{
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memset(s, 0, sizeof(*s));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_UTF8_pack_state(_UTF8EncodingInfo *ei, void *pspriv,
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const _UTF8State *s)
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{
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memcpy(pspriv, (const void *)s, sizeof(*s));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei, _UTF8State *s,
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const void *pspriv)
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{
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memcpy((void *)s, pspriv, sizeof(*s));
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}
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static int
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_citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s,
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size_t n, _UTF8State *psenc, size_t *nresult)
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{
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wchar_t wchar;
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const char *s0;
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int c;
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int i;
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int chlenbak;
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_DIAGASSERT(nresult != 0);
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_DIAGASSERT(ei != NULL);
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_DIAGASSERT(s != NULL);
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_DIAGASSERT(psenc != NULL);
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s0 = *s;
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if (s0 == NULL) {
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_citrus_UTF8_init_state(ei, psenc);
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*nresult = 0; /* state independent */
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return (0);
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}
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chlenbak = psenc->chlen;
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/* make sure we have the first byte in the buffer */
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switch (psenc->chlen) {
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case 0:
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if (n < 1) {
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goto restart;
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}
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psenc->ch[0] = *s0++;
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psenc->chlen = 1;
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n--;
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break;
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case 1: case 2: case 3: case 4: case 5:
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break;
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default:
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/* illegal state */
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goto ilseq;
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}
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c = _UTF8_count[psenc->ch[0] & 0xff];
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if (c == 0)
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goto ilseq;
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while (psenc->chlen < c) {
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if (n < 1) {
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goto restart;
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}
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psenc->ch[psenc->chlen] = *s0++;
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psenc->chlen++;
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n--;
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}
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switch (c) {
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case 1:
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wchar = psenc->ch[0] & 0xff;
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break;
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case 2: case 3: case 4: case 5: case 6:
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wchar = psenc->ch[0] & (0x7f >> c);
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for (i = 1; i < c; i++) {
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if ((psenc->ch[i] & 0xc0) != 0x80)
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goto ilseq;
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wchar <<= 6;
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wchar |= (psenc->ch[i] & 0x3f);
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}
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_DIAGASSERT(findlen(wchar) == c);
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break;
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}
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*s = s0;
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psenc->chlen = 0;
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if (pwc)
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*pwc = wchar;
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if (!wchar)
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*nresult = 0;
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else
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*nresult = c - chlenbak;
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return (0);
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ilseq:
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psenc->chlen = 0;
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return (EILSEQ);
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restart:
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*nresult = (size_t)-2;
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*s = s0;
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return (0);
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}
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static int
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_citrus_UTF8_wcrtomb_priv(_UTF8EncodingInfo *ei, char *s, size_t n, wchar_t wc,
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_UTF8State *psenc, size_t *nresult)
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{
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int cnt, i;
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wchar_t c;
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_DIAGASSERT(ei != NULL);
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_DIAGASSERT(nresult != 0);
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_DIAGASSERT(s != NULL);
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cnt = _UTF8_findlen(wc);
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if (cnt <= 0 || cnt > 6) {
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/* invalid UCS4 value */
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goto ilseq;
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}
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if (n < cnt) {
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/* bound check failure */
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goto ilseq;
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}
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c = wc;
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if (s) {
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for (i = cnt - 1; i > 0; i--) {
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s[i] = 0x80 | (c & 0x3f);
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c >>= 6;
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}
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s[0] = c;
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if (cnt == 1)
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s[0] &= 0x7f;
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else {
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s[0] &= (0x7f >> cnt);
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s[0] |= ((0xff00 >> cnt) & 0xff);
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}
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}
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*nresult = (size_t)cnt;
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return (0);
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ilseq:
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*nresult = (size_t)-1;
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return (EILSEQ);
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}
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static int
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/*ARGSUSED*/
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_citrus_UTF8_stdencoding_init(_UTF8EncodingInfo * __restrict ei,
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const void * __restrict var, size_t lenvar)
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{
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_DIAGASSERT(ei != NULL);
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_UTF8_init_count();
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memset((void *)ei, 0, sizeof(*ei));
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return (0);
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}
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static void
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/*ARGSUSED*/
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_citrus_UTF8_stdencoding_uninit(_UTF8EncodingInfo *ei)
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{
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}
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/* ----------------------------------------------------------------------
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* public interface for ctype
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*/
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_CITRUS_CTYPE_DECLS(UTF8);
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_CITRUS_CTYPE_DEF_OPS(UTF8);
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#include "citrus_ctype_template.h"
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