NetBSD-5.0.2/lib/libc/citrus/modules/citrus_big5.c
/* $NetBSD: citrus_big5.c,v 1.12 2008/06/14 16:01:07 tnozaki Exp $ */
/*-
* Copyright (c)2002, 2006 Citrus Project,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_big5.c,v 1.12 2008/06/14 16:01:07 tnozaki Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/queue.h>
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <wchar.h>
#include <limits.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_bcs.h"
#include "citrus_module.h"
#include "citrus_ctype.h"
#include "citrus_stdenc.h"
#include "citrus_big5.h"
#include "citrus_prop.h"
/* ----------------------------------------------------------------------
* private stuffs used by templates
*/
typedef struct {
char ch[2];
int chlen;
} _BIG5State;
typedef struct _BIG5Exclude {
TAILQ_ENTRY(_BIG5Exclude) entry;
wint_t start, end;
} _BIG5Exclude;
typedef TAILQ_HEAD(_BIG5ExcludeList, _BIG5Exclude) _BIG5ExcludeList;
typedef struct {
int cell[0x100];
_BIG5ExcludeList excludes;
} _BIG5EncodingInfo;
typedef struct {
_BIG5EncodingInfo ei;
struct {
/* for future multi-locale facility */
_BIG5State s_mblen;
_BIG5State s_mbrlen;
_BIG5State s_mbrtowc;
_BIG5State s_mbtowc;
_BIG5State s_mbsrtowcs;
_BIG5State s_wcrtomb;
_BIG5State s_wcsrtombs;
_BIG5State s_wctomb;
} states;
} _BIG5CTypeInfo;
#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
#define _FUNCNAME(m) _citrus_BIG5_##m
#define _ENCODING_INFO _BIG5EncodingInfo
#define _CTYPE_INFO _BIG5CTypeInfo
#define _ENCODING_STATE _BIG5State
#define _ENCODING_MB_CUR_MAX(_ei_) 2
#define _ENCODING_IS_STATE_DEPENDENT 0
#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
static __inline void
/*ARGSUSED*/
_citrus_BIG5_init_state(_BIG5EncodingInfo * __restrict ei,
_BIG5State * __restrict s)
{
memset(s, 0, sizeof(*s));
}
static __inline void
/*ARGSUSED*/
_citrus_BIG5_pack_state(_BIG5EncodingInfo * __restrict ei,
void * __restrict pspriv,
const _BIG5State * __restrict s)
{
memcpy(pspriv, (const void *)s, sizeof(*s));
}
static __inline void
/*ARGSUSED*/
_citrus_BIG5_unpack_state(_BIG5EncodingInfo * __restrict ei,
_BIG5State * __restrict s,
const void * __restrict pspriv)
{
memcpy((void *)s, pspriv, sizeof(*s));
}
static __inline int
_citrus_BIG5_check(_BIG5EncodingInfo *ei, u_int c)
{
_DIAGASSERT(ei != NULL);
return (ei->cell[c & 0xFF] & 0x1) ? 2 : 1;
}
static __inline int
_citrus_BIG5_check2(_BIG5EncodingInfo *ei, u_int c)
{
_DIAGASSERT(ei != NULL);
return (ei->cell[c & 0xFF] & 0x2) ? 1 : 0;
}
static __inline int
_citrus_BIG5_check_excludes(_BIG5EncodingInfo *ei, wint_t c)
{
_BIG5Exclude *exclude;
_DIAGASSERT(ei != NULL);
TAILQ_FOREACH(exclude, &ei->excludes, entry) {
if (c >= exclude->start && c <= exclude->end)
return EILSEQ;
}
return 0;
}
static int
_citrus_BIG5_fill_rowcol(void ** __restrict ctx, const char * __restrict s,
uint64_t start, uint64_t end)
{
_BIG5EncodingInfo *ei;
int i;
uint64_t n;
_DIAGASSERT(ctx != NULL && *ctx != NULL);
if (start > 0xFF || end > 0xFF)
return EINVAL;
ei = (_BIG5EncodingInfo *)*ctx;
i = strcmp("row", s) ? 1 : 0;
i = 1 << i;
for (n = start; n <= end; ++n)
ei->cell[n & 0xFF] |= i;
return 0;
}
static int
/*ARGSUSED*/
_citrus_BIG5_fill_excludes(void ** __restrict ctx, const char * __restrict s,
uint64_t start, uint64_t end)
{
_BIG5EncodingInfo *ei;
_BIG5Exclude *exclude;
_DIAGASSERT(ctx != NULL && *ctx != NULL);
if (start > 0xFFFF || end > 0xFFFF)
return EINVAL;
ei = (_BIG5EncodingInfo *)*ctx;
exclude = TAILQ_LAST(&ei->excludes, _BIG5ExcludeList);
if (exclude != NULL && (wint_t)start <= exclude->end)
return EINVAL;
exclude = (void *)malloc(sizeof(*exclude));
if (exclude == NULL)
return ENOMEM;
exclude->start = (wint_t)start;
exclude->end = (wint_t)end;
TAILQ_INSERT_TAIL(&ei->excludes, exclude, entry);
return 0;
}
static const _citrus_prop_hint_t root_hints[] = {
_CITRUS_PROP_HINT_NUM("row", &_citrus_BIG5_fill_rowcol),
_CITRUS_PROP_HINT_NUM("col", &_citrus_BIG5_fill_rowcol),
_CITRUS_PROP_HINT_NUM("excludes", &_citrus_BIG5_fill_excludes),
_CITRUS_PROP_HINT_END
};
static void
/*ARGSUSED*/
_citrus_BIG5_encoding_module_uninit(_BIG5EncodingInfo *ei)
{
_BIG5Exclude *exclude;
_DIAGASSERT(ei != NULL);
while ((exclude = TAILQ_FIRST(&ei->excludes)) != NULL) {
TAILQ_REMOVE(&ei->excludes, exclude, entry);
free(exclude);
}
}
static int
/*ARGSUSED*/
_citrus_BIG5_encoding_module_init(_BIG5EncodingInfo * __restrict ei,
const void * __restrict var, size_t lenvar)
{
int err;
const char *s;
_DIAGASSERT(ei != NULL);
memset((void *)ei, 0, sizeof(*ei));
TAILQ_INIT(&ei->excludes);
if (lenvar > 0 && var != NULL) {
s = _bcs_skip_ws_len((const char *)var, &lenvar);
if (lenvar > 0 && *s != '\0') {
err = _citrus_prop_parse_variable(
root_hints, (void *)ei, s, lenvar);
if (err == 0)
return 0;
_citrus_BIG5_encoding_module_uninit(ei);
memset((void *)ei, 0, sizeof(*ei));
TAILQ_INIT(&ei->excludes);
}
}
/* fallback Big5-1984, for backward compatibility. */
_citrus_BIG5_fill_rowcol((void **)&ei, "row", 0xA1, 0xFE);
_citrus_BIG5_fill_rowcol((void **)&ei, "col", 0x40, 0x7E);
_citrus_BIG5_fill_rowcol((void **)&ei, "col", 0xA1, 0xFE);
return 0;
}
static int
/*ARGSUSED*/
_citrus_BIG5_mbrtowc_priv(_BIG5EncodingInfo * __restrict ei,
wchar_t * __restrict pwc,
const char ** __restrict s, size_t n,
_BIG5State * __restrict psenc,
size_t * __restrict nresult)
{
wchar_t wchar;
int c;
int chlenbak;
const char *s0;
_DIAGASSERT(nresult != 0);
_DIAGASSERT(ei != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(s != NULL && *s != NULL);
s0 = *s;
if (s0 == NULL) {
_citrus_BIG5_init_state(ei, psenc);
*nresult = 0;
return (0);
}
chlenbak = psenc->chlen;
/* make sure we have the first byte in the buffer */
switch (psenc->chlen) {
case 0:
if (n < 1)
goto restart;
psenc->ch[0] = *s0++;
psenc->chlen = 1;
n--;
break;
case 1:
break;
default:
/* illegal state */
goto ilseq;
}
c = _citrus_BIG5_check(ei, psenc->ch[0] & 0xff);
if (c == 0)
goto ilseq;
while (psenc->chlen < c) {
if (n < 1) {
goto restart;
}
psenc->ch[psenc->chlen] = *s0++;
psenc->chlen++;
n--;
}
switch (c) {
case 1:
wchar = psenc->ch[0] & 0xff;
break;
case 2:
if (!_citrus_BIG5_check2(ei, psenc->ch[1] & 0xff))
goto ilseq;
wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
break;
default:
/* illegal state */
goto ilseq;
}
if (_citrus_BIG5_check_excludes(ei, (wint_t)wchar) != 0)
goto ilseq;
*s = s0;
psenc->chlen = 0;
if (pwc)
*pwc = wchar;
if (!wchar)
*nresult = 0;
else
*nresult = c - chlenbak;
return (0);
ilseq:
psenc->chlen = 0;
*nresult = (size_t)-1;
return (EILSEQ);
restart:
*s = s0;
*nresult = (size_t)-2;
return (0);
}
static int
/*ARGSUSED*/
_citrus_BIG5_wcrtomb_priv(_BIG5EncodingInfo * __restrict ei,
char * __restrict s,
size_t n, wchar_t wc, _BIG5State * __restrict psenc,
size_t * __restrict nresult)
{
int l, ret;
_DIAGASSERT(ei != NULL);
_DIAGASSERT(nresult != 0);
_DIAGASSERT(s != NULL);
/* check invalid sequence */
if (wc & ~0xffff ||
_citrus_BIG5_check_excludes(ei, (wint_t)wc) != 0) {
ret = EILSEQ;
goto err;
}
if (wc & 0x8000) {
if (_citrus_BIG5_check(ei, (wc >> 8) & 0xff) != 2 ||
!_citrus_BIG5_check2(ei, wc & 0xff)) {
ret = EILSEQ;
goto err;
}
l = 2;
} else {
if (wc & ~0xff || !_citrus_BIG5_check(ei, wc & 0xff)) {
ret = EILSEQ;
goto err;
}
l = 1;
}
if (n < l) {
/* bound check failure */
ret = E2BIG;
goto err;
}
if (l == 2) {
s[0] = (wc >> 8) & 0xff;
s[1] = wc & 0xff;
} else
s[0] = wc & 0xff;
*nresult = l;
return 0;
err:
*nresult = (size_t)-1;
return ret;
}
static __inline int
/*ARGSUSED*/
_citrus_BIG5_stdenc_wctocs(_BIG5EncodingInfo * __restrict ei,
_csid_t * __restrict csid,
_index_t * __restrict idx, wchar_t wc)
{
_DIAGASSERT(csid != NULL && idx != NULL);
*csid = (wc < 0x100) ? 0 : 1;
*idx = (_index_t)wc;
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_BIG5_stdenc_cstowc(_BIG5EncodingInfo * __restrict ei,
wchar_t * __restrict wc,
_csid_t csid, _index_t idx)
{
_DIAGASSERT(wc != NULL);
switch (csid) {
case 0:
case 1:
*wc = (wchar_t)idx;
break;
default:
return EILSEQ;
}
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_BIG5_stdenc_get_state_desc_generic(_BIG5EncodingInfo * __restrict ei,
_BIG5State * __restrict psenc,
int * __restrict rstate)
{
if (psenc->chlen == 0)
*rstate = _STDENC_SDGEN_INITIAL;
else
*rstate = _STDENC_SDGEN_INCOMPLETE_CHAR;
return 0;
}
/* ----------------------------------------------------------------------
* public interface for ctype
*/
_CITRUS_CTYPE_DECLS(BIG5);
_CITRUS_CTYPE_DEF_OPS(BIG5);
#include "citrus_ctype_template.h"
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(BIG5);
_CITRUS_STDENC_DEF_OPS(BIG5);
#include "citrus_stdenc_template.h"