8a16b7a18f
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461 lines
11 KiB
C
461 lines
11 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: citrus_big5.c,v 1.13 2011/05/23 14:53:46 joerg Exp $ */
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/*-
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* Copyright (c)2002, 2006 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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* SPDX-License-Identifier: BSD-3-Clause
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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/queue.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 <stddef.h>
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#include <stdint.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_prop.h"
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#include "citrus_types.h"
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#include "citrus_bcs.h"
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#include "citrus_module.h"
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#include "citrus_stdenc.h"
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#include "citrus_big5.h"
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/* ----------------------------------------------------------------------
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* private stuffs used by templates
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*/
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typedef struct {
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int chlen;
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char ch[2];
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} _BIG5State;
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typedef struct _BIG5Exclude {
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TAILQ_ENTRY(_BIG5Exclude) entry;
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wint_t start;
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wint_t end;
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} _BIG5Exclude;
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typedef TAILQ_HEAD(_BIG5ExcludeList, _BIG5Exclude) _BIG5ExcludeList;
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typedef struct {
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_BIG5ExcludeList excludes;
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int cell[0x100];
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} _BIG5EncodingInfo;
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#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
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#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
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#define _FUNCNAME(m) _citrus_BIG5_##m
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#define _ENCODING_INFO _BIG5EncodingInfo
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#define _ENCODING_STATE _BIG5State
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#define _ENCODING_MB_CUR_MAX(_ei_) 2
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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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/*ARGSUSED*/
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_citrus_BIG5_init_state(_BIG5EncodingInfo * __restrict ei __unused,
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_BIG5State * __restrict s)
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{
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memset(s, 0, sizeof(*s));
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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_BIG5_pack_state(_BIG5EncodingInfo * __restrict ei __unused,
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void * __restrict pspriv,
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const _BIG5State * __restrict 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_BIG5_unpack_state(_BIG5EncodingInfo * __restrict ei __unused,
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_BIG5State * __restrict s,
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const void * __restrict 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 __inline int
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_citrus_BIG5_check(_BIG5EncodingInfo *ei, unsigned int c)
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{
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return ((ei->cell[c & 0xFF] & 0x1) ? 2 : 1);
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}
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static __inline int
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_citrus_BIG5_check2(_BIG5EncodingInfo *ei, unsigned int c)
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{
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return ((ei->cell[c & 0xFF] & 0x2) ? 1 : 0);
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}
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static __inline int
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_citrus_BIG5_check_excludes(_BIG5EncodingInfo *ei, wint_t c)
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{
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_BIG5Exclude *exclude;
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TAILQ_FOREACH(exclude, &ei->excludes, entry) {
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if (c >= exclude->start && c <= exclude->end)
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return (EILSEQ);
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}
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return (0);
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}
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static int
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_citrus_BIG5_fill_rowcol(void * __restrict ctx, const char * __restrict s,
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uint64_t start, uint64_t end)
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{
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_BIG5EncodingInfo *ei;
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uint64_t n;
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int i;
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if (start > 0xFF || end > 0xFF)
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return (EINVAL);
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ei = (_BIG5EncodingInfo *)ctx;
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i = strcmp("row", s) ? 1 : 0;
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i = 1 << i;
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for (n = start; n <= end; ++n)
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ei->cell[n & 0xFF] |= i;
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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_BIG5_fill_excludes(void * __restrict ctx,
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const char * __restrict s __unused, uint64_t start, uint64_t end)
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{
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_BIG5EncodingInfo *ei;
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_BIG5Exclude *exclude;
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if (start > 0xFFFF || end > 0xFFFF)
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return (EINVAL);
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ei = (_BIG5EncodingInfo *)ctx;
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exclude = TAILQ_LAST(&ei->excludes, _BIG5ExcludeList);
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if (exclude != NULL && (wint_t)start <= exclude->end)
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return (EINVAL);
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exclude = (void *)malloc(sizeof(*exclude));
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if (exclude == NULL)
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return (ENOMEM);
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exclude->start = (wint_t)start;
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exclude->end = (wint_t)end;
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TAILQ_INSERT_TAIL(&ei->excludes, exclude, entry);
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return (0);
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}
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static const _citrus_prop_hint_t root_hints[] = {
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_CITRUS_PROP_HINT_NUM("row", &_citrus_BIG5_fill_rowcol),
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_CITRUS_PROP_HINT_NUM("col", &_citrus_BIG5_fill_rowcol),
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_CITRUS_PROP_HINT_NUM("excludes", &_citrus_BIG5_fill_excludes),
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_CITRUS_PROP_HINT_END
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};
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static void
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/*ARGSUSED*/
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_citrus_BIG5_encoding_module_uninit(_BIG5EncodingInfo *ei)
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{
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_BIG5Exclude *exclude;
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while ((exclude = TAILQ_FIRST(&ei->excludes)) != NULL) {
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TAILQ_REMOVE(&ei->excludes, exclude, entry);
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free(exclude);
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}
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}
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static int
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/*ARGSUSED*/
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_citrus_BIG5_encoding_module_init(_BIG5EncodingInfo * __restrict ei,
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const void * __restrict var, size_t lenvar)
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{
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const char *s;
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int err;
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memset((void *)ei, 0, sizeof(*ei));
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TAILQ_INIT(&ei->excludes);
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if (lenvar > 0 && var != NULL) {
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s = _bcs_skip_ws_len((const char *)var, &lenvar);
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if (lenvar > 0 && *s != '\0') {
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err = _citrus_prop_parse_variable(
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root_hints, (void *)ei, s, lenvar);
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if (err == 0)
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return (0);
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_citrus_BIG5_encoding_module_uninit(ei);
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memset((void *)ei, 0, sizeof(*ei));
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TAILQ_INIT(&ei->excludes);
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}
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}
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/* fallback Big5-1984, for backward compatibility. */
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_citrus_BIG5_fill_rowcol(ei, "row", 0xA1, 0xFE);
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_citrus_BIG5_fill_rowcol(ei, "col", 0x40, 0x7E);
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_citrus_BIG5_fill_rowcol(ei, "col", 0xA1, 0xFE);
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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_BIG5_mbrtowc_priv(_BIG5EncodingInfo * __restrict ei,
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wchar_t * __restrict pwc,
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char ** __restrict s, size_t n,
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_BIG5State * __restrict psenc,
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size_t * __restrict nresult)
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{
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wchar_t wchar;
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char *s0;
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int c, chlenbak;
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s0 = *s;
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if (s0 == NULL) {
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_citrus_BIG5_init_state(ei, psenc);
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*nresult = 0;
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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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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:
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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 = _citrus_BIG5_check(ei, 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:
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if (!_citrus_BIG5_check2(ei, psenc->ch[1] & 0xff))
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goto ilseq;
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wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
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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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if (_citrus_BIG5_check_excludes(ei, (wint_t)wchar) != 0)
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goto ilseq;
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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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*nresult = wchar ? c - chlenbak : 0;
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return (0);
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ilseq:
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psenc->chlen = 0;
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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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/*ARGSUSED*/
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_citrus_BIG5_wcrtomb_priv(_BIG5EncodingInfo * __restrict ei,
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char * __restrict s,
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size_t n, wchar_t wc, _BIG5State * __restrict psenc __unused,
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size_t * __restrict nresult)
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{
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size_t l;
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int ret;
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/* check invalid sequence */
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if (wc & ~0xffff ||
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_citrus_BIG5_check_excludes(ei, (wint_t)wc) != 0) {
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ret = EILSEQ;
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goto err;
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}
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if (wc & 0x8000) {
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if (_citrus_BIG5_check(ei, (wc >> 8) & 0xff) != 2 ||
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!_citrus_BIG5_check2(ei, wc & 0xff)) {
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ret = EILSEQ;
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goto err;
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}
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l = 2;
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} else {
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if (wc & ~0xff || !_citrus_BIG5_check(ei, wc & 0xff)) {
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ret = EILSEQ;
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goto err;
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}
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l = 1;
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}
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if (n < l) {
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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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if (l == 2) {
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s[0] = (wc >> 8) & 0xff;
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s[1] = wc & 0xff;
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} else
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s[0] = wc & 0xff;
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*nresult = l;
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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_BIG5_stdenc_wctocs(_BIG5EncodingInfo * __restrict ei __unused,
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_csid_t * __restrict csid,
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_index_t * __restrict idx, wchar_t wc)
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{
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*csid = (wc < 0x100) ? 0 : 1;
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*idx = (_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_BIG5_stdenc_cstowc(_BIG5EncodingInfo * __restrict ei __unused,
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wchar_t * __restrict wc,
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_csid_t csid, _index_t idx)
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{
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switch (csid) {
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case 0:
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case 1:
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*wc = (wchar_t)idx;
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break;
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default:
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return (EILSEQ);
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}
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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_BIG5_stdenc_get_state_desc_generic(_BIG5EncodingInfo * __restrict ei __unused,
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_BIG5State * __restrict psenc,
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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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/* ----------------------------------------------------------------------
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* public interface for stdenc
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*/
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_CITRUS_STDENC_DECLS(BIG5);
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_CITRUS_STDENC_DEF_OPS(BIG5);
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#include "citrus_stdenc_template.h"
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