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NetBSD/lib/libc/citrus/modules/citrus_euctw.c
tshiozak 1beef8fe93 fix lib/31874. 
- add _citrus_stdenc_get_state_desc() interface to get
  encoding-scheme-independent encoder/decoder state descriptions.
- make sure that iconv_std module uses it to judge whether the last
  sequences forms complete shift sequences.
- bump minor of i18n_module because of get_state_desc().
2005-10-29 18:02:04 +00:00

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/* $NetBSD: citrus_euctw.c,v 1.10 2005/10/29 18:02:04 tshiozak Exp $ */
/*-
* Copyright (c)2002 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)1999 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.
*
* $Citrus: xpg4dl/FreeBSD/lib/libc/locale/euctw.c,v 1.13 2001/06/21 01:51:44 yamt Exp $
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_euctw.c,v 1.10 2005/10/29 18:02:04 tshiozak Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <locale.h>
#include <wchar.h>
#include <sys/types.h>
#include <limits.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_module.h"
#include "citrus_ctype.h"
#include "citrus_stdenc.h"
#include "citrus_euctw.h"
/* ----------------------------------------------------------------------
* private stuffs used by templates
*/
typedef struct {
char ch[4];
int chlen;
} _EUCTWState;
typedef struct {
int dummy;
} _EUCTWEncodingInfo;
typedef struct {
_EUCTWEncodingInfo ei;
struct {
/* for future multi-locale facility */
_EUCTWState s_mblen;
_EUCTWState s_mbrlen;
_EUCTWState s_mbrtowc;
_EUCTWState s_mbtowc;
_EUCTWState s_mbsrtowcs;
_EUCTWState s_wcrtomb;
_EUCTWState s_wcsrtombs;
_EUCTWState s_wctomb;
} states;
} _EUCTWCTypeInfo;
#define _SS2 0x008e
#define _SS3 0x008f
#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
#define _FUNCNAME(m) _citrus_EUCTW_##m
#define _ENCODING_INFO _EUCTWEncodingInfo
#define _CTYPE_INFO _EUCTWCTypeInfo
#define _ENCODING_STATE _EUCTWState
#define _ENCODING_MB_CUR_MAX(_ei_) 4
#define _ENCODING_IS_STATE_DEPENDENT 0
#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
static __inline int
_citrus_EUCTW_cs(u_int c)
{
c &= 0xff;
return ((c & 0x80) ? (c == _SS2 ? 2 : 1) : 0);
}
static __inline int
_citrus_EUCTW_count(int cs)
{
switch (cs) {
case 0:
return 1;
case 1:
return 2;
case 2:
return 4;
case 3:
abort();
/*NOTREACHED*/
}
return 0;
}
static __inline void
/*ARGSUSED*/
_citrus_EUCTW_init_state(_EUCTWEncodingInfo * __restrict ei,
_EUCTWState * __restrict s)
{
memset(s, 0, sizeof(*s));
}
static __inline void
/*ARGSUSED*/
_citrus_EUCTW_pack_state(_EUCTWEncodingInfo * __restrict ei,
void * __restrict pspriv,
const _EUCTWState * __restrict s)
{
memcpy(pspriv, (const void *)s, sizeof(*s));
}
static __inline void
/*ARGSUSED*/
_citrus_EUCTW_unpack_state(_EUCTWEncodingInfo * __restrict ei,
_EUCTWState * __restrict s,
const void * __restrict pspriv)
{
memcpy((void *)s, pspriv, sizeof(*s));
}
static int
/*ARGSUSED*/
_citrus_EUCTW_encoding_module_init(_EUCTWEncodingInfo * __restrict ei,
const void * __restrict var, size_t lenvar)
{
_DIAGASSERT(ei != NULL);
memset((void *)ei, 0, sizeof(*ei));
return 0;
}
static void
/*ARGSUSED*/
_citrus_EUCTW_encoding_module_uninit(_EUCTWEncodingInfo *ei)
{
}
static int
_citrus_EUCTW_mbrtowc_priv(_EUCTWEncodingInfo * __restrict ei,
wchar_t * __restrict pwc,
const char ** __restrict s,
size_t n, _EUCTWState * __restrict psenc,
size_t * __restrict nresult)
{
wchar_t wchar;
int c, cs;
int chlenbak;
const char *s0;
_DIAGASSERT(nresult != 0);
_DIAGASSERT(ei != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(s != NULL);
s0 = *s;
if (s0 == NULL) {
_citrus_EUCTW_init_state(ei, psenc);
*nresult = 0; /* state independent */
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:
case 2:
break;
default:
/* illgeal state */
goto ilseq;
}
c = _citrus_EUCTW_count(cs = _citrus_EUCTW_cs(psenc->ch[0] & 0xff));
if (c == 0)
goto ilseq;
while (psenc->chlen < c) {
if (n < 1)
goto ilseq;
psenc->ch[psenc->chlen] = *s0++;
psenc->chlen++;
n--;
}
wchar = 0;
switch (cs) {
case 0:
if (psenc->ch[0] & 0x80)
goto ilseq;
wchar = psenc->ch[0] & 0xff;
break;
case 1:
if (!(psenc->ch[0] & 0x80) || !(psenc->ch[1] & 0x80))
goto ilseq;
wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
wchar |= 'G' << 24;
break;
case 2:
if ((u_char)psenc->ch[1] < 0xa1 || 0xa7 < (u_char)psenc->ch[1])
goto ilseq;
if (!(psenc->ch[2] & 0x80) || !(psenc->ch[3] & 0x80))
goto ilseq;
wchar = ((psenc->ch[2] & 0xff) << 8) | (psenc->ch[3] & 0xff);
wchar |= ('G' + psenc->ch[1] - 0xa1) << 24;
break;
default:
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)-1;
return (0);
}
static int
_citrus_EUCTW_wcrtomb_priv(_EUCTWEncodingInfo * __restrict ei,
char * __restrict s, size_t n, wchar_t wc,
_EUCTWState * __restrict psenc,
size_t * __restrict nresult)
{
wchar_t cs = wc & 0x7f000080;
wchar_t v;
int i, len, clen, ret;
_DIAGASSERT(ei != NULL);
_DIAGASSERT(nresult != 0);
_DIAGASSERT(s != NULL);
clen = 1;
if (wc & 0x00007f00)
clen = 2;
if ((wc & 0x007f0000) && !(wc & 0x00800000))
clen = 3;
if (clen == 1 && cs == 0x00000000) {
/* ASCII */
len = 1;
if (n < len) {
ret = E2BIG;
goto err;
}
v = wc & 0x0000007f;
} else if (clen == 2 && cs == ('G' << 24)) {
/* CNS-11643-1 */
len = 2;
if (n < len) {
ret = E2BIG;
goto err;
}
v = wc & 0x00007f7f;
v |= 0x00008080;
} else if (clen == 2 && 'H' <= (cs >> 24) && (cs >> 24) <= 'M') {
/* CNS-11643-[2-7] */
len = 4;
if (n < len) {
ret = E2BIG;
goto err;
}
*s++ = _SS2;
*s++ = (cs >> 24) - 'H' + 0xa2;
v = wc & 0x00007f7f;
v |= 0x00008080;
} else {
ret = EILSEQ;
goto err;
}
i = clen;
while (i-- > 0)
*s++ = (v >> (i << 3)) & 0xff;
*nresult = len;
return 0;
err:
*nresult = (size_t)-1;
return ret;
}
static __inline int
/*ARGSUSED*/
_citrus_EUCTW_stdenc_wctocs(_EUCTWEncodingInfo * __restrict ei,
_csid_t * __restrict csid,
_index_t * __restrict idx, wchar_t wc)
{
_DIAGASSERT(ei != NULL && csid != NULL && idx != NULL);
*csid = (_csid_t)(wc >> 24) & 0xFF;
*idx = (_index_t)(wc & 0x7F7F);
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_EUCTW_stdenc_cstowc(_EUCTWEncodingInfo * __restrict ei,
wchar_t * __restrict wc,
_csid_t csid, _index_t idx)
{
_DIAGASSERT(ei != NULL && wc != NULL);
if (csid==0) {
if ((idx & ~0x7F) != 0)
return (EINVAL);
*wc = (wchar_t)idx;
} else {
if (csid < 'G' || csid > 'M' || (idx & ~0x7F7F) != 0)
return (EINVAL);
*wc = (wchar_t)idx | ((wchar_t)csid<<24);
}
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_EUCTW_stdenc_get_state_desc_generic(_EUCTWEncodingInfo * __restrict ei,
_EUCTWState * __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(EUCTW);
_CITRUS_CTYPE_DEF_OPS(EUCTW);
#include "citrus_ctype_template.h"
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(EUCTW);
_CITRUS_STDENC_DEF_OPS(EUCTW);
#include "citrus_stdenc_template.h"
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