352 lines
9.2 KiB
C
352 lines
9.2 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: citrus_utf8.c,v 1.17 2008/06/14 16:01:08 tnozaki 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. 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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#include <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.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 "citrus_namespace.h"
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#include "citrus_types.h"
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#include "citrus_module.h"
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#include "citrus_stdenc.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 uint8_t _UTF8_count_array[256] = {
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 20 - 2F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 30 - 3F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 40 - 4F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 50 - 5F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 60 - 6F */
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 70 - 7F */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 - 8F */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 90 - 9F */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* A0 - AF */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* B0 - BF */
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* C0 - CF */
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* D0 - DF */
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* E0 - EF */
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4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0 /* F0 - FF */
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};
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static uint8_t const *_UTF8_count = _UTF8_count_array;
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static const uint32_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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int chlen;
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char ch[6];
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} _UTF8State;
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typedef void *_UTF8EncodingInfo;
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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 _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 size_t
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_UTF8_findlen(wchar_t v)
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{
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size_t i;
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uint32_t c;
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c = (uint32_t)v; /*XXX*/
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for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]) - 1; 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 bool
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_UTF8_surrogate(wchar_t wc)
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{
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return (wc >= 0xd800 && wc <= 0xdfff);
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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 __unused, _UTF8State *s)
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{
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s->chlen = 0;
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}
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#if 0
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static __inline void
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/*ARGSUSED*/
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_citrus_UTF8_pack_state(_UTF8EncodingInfo *ei __unused, 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 __unused, _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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#endif
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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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const char *s0;
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wchar_t wchar;
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int i;
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uint8_t c;
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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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/* make sure we have the first byte in the buffer */
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if (psenc->chlen == 0) {
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if (n-- < 1)
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goto restart;
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psenc->ch[psenc->chlen++] = *s0++;
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}
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c = _UTF8_count[psenc->ch[0] & 0xff];
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if (c < 1 || c < psenc->chlen)
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goto ilseq;
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if (c == 1)
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wchar = psenc->ch[0] & 0xff;
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else {
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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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psenc->ch[psenc->chlen++] = *s0++;
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}
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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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if (_UTF8_surrogate(wchar) || _UTF8_findlen(wchar) != c)
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goto ilseq;
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}
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if (pwc != NULL)
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*pwc = wchar;
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*nresult = (wchar == 0) ? 0 : s0 - *s;
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*s = s0;
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psenc->chlen = 0;
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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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restart:
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*s = s0;
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*nresult = (size_t)-2;
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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 __unused, char *s, size_t n,
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wchar_t wc, _UTF8State *psenc __unused, size_t *nresult)
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{
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wchar_t c;
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size_t cnt;
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int i, ret;
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if (_UTF8_surrogate(wc)) {
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ret = EILSEQ;
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goto err;
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}
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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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ret = EILSEQ;
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goto err;
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}
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if (n < cnt) {
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/* bound check failure */
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ret = E2BIG;
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goto err;
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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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err:
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*nresult = (size_t)-1;
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return (ret);
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_UTF8_stdenc_wctocs(_UTF8EncodingInfo * __restrict ei __unused,
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_csid_t * __restrict csid, _index_t * __restrict idx,
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wchar_t wc)
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{
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*csid = 0;
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*idx = (_citrus_index_t)wc;
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return (0);
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei __unused,
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wchar_t * __restrict wc, _csid_t csid, _index_t idx)
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{
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if (csid != 0)
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return (EILSEQ);
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*wc = (wchar_t)idx;
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return (0);
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}
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static __inline int
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/*ARGSUSED*/
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_citrus_UTF8_stdenc_get_state_desc_generic(_UTF8EncodingInfo * __restrict ei __unused,
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_UTF8State * __restrict psenc, int * __restrict rstate)
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{
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*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
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_STDENC_SDGEN_INCOMPLETE_CHAR;
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return (0);
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}
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static int
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/*ARGSUSED*/
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_citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei __unused,
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const void * __restrict var __unused, size_t lenvar __unused)
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{
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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_encoding_module_uninit(_UTF8EncodingInfo *ei __unused)
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{
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}
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/* ----------------------------------------------------------------------
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* public interface for stdenc
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*/
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_CITRUS_STDENC_DECLS(UTF8);
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_CITRUS_STDENC_DEF_OPS(UTF8);
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#include "citrus_stdenc_template.h"
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