NetBSD/lib/libc/locale/euctw.c

330 lines
6.7 KiB
C

/* $NetBSD: euctw.c,v 1.9 2001/01/27 05:40:18 tsutsui Exp $ */
/*-
* 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 Id: euctw.c,v 1.10 2000/12/30 04:51:34 itojun Exp
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: euctw.c,v 1.9 2001/01/27 05:40:18 tsutsui Exp $");
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include "rune.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef lint
#define inline
#endif
const char *_EUCTW_magic __P((void));
int _EUCTW_init __P((_RuneLocale *));
static inline int _euc_set __P((u_int));
static inline int _euc_count __P((int));
size_t _EUCTW_mbrtowc __P((struct _RuneLocale *, rune_t *, const char *,
size_t, void *));
size_t _EUCTW_wcrtomb __P((struct _RuneLocale *, char *, size_t, const rune_t,
void *));
void _EUCTW_initstate __P((_RuneLocale *, void *));
void _EUCTW_packstate __P((_RuneLocale *, mbstate_t *, void *));
void _EUCTW_unpackstate __P((_RuneLocale *, void *, const mbstate_t *));
typedef struct {
void *runelocale; /* reserved for future thread-safeness */
char ch[4];
int chlen;
} _EUCTWState;
static _RuneState _EUCTW_RuneState = {
sizeof(_EUCTWState), /* sizestate */
_EUCTW_initstate, /* initstate */
_EUCTW_packstate, /* packstate */
_EUCTW_unpackstate /* unpackstate */
};
const char *
_EUCTW_magic()
{
return _RUNE_MODULE_1("LC_CTYPE");
}
int
_EUCTW_init(rl)
_RuneLocale *rl;
{
_DIAGASSERT(rl != NULL);
/* sanity check to avoid overruns */
if (sizeof(_EUCTWState) > sizeof(mbstate_t))
return (EINVAL);
rl->__rune_mbrtowc = _EUCTW_mbrtowc;
rl->__rune_wcrtomb = _EUCTW_wcrtomb;
rl->__rune_RuneState = &_EUCTW_RuneState;
rl->__rune_mb_cur_max = 4;
return (0);
}
#define _SS2 0x008e
#define _SS3 0x008f
static inline int
_euc_set(c)
u_int c;
{
c &= 0xff;
return ((c & 0x80) ? (c == _SS2 ? 2 : 1) : 0);
}
static inline int
_euc_count(set)
int set;
{
switch (set) {
case 0:
return 1;
case 1:
return 2;
case 2:
return 4;
case 3:
abort();
/*NOTREACHED*/
}
return 0;
}
/* s is non-null */
size_t
_EUCTW_mbrtowc(rl, pwcs, s, n, state)
_RuneLocale *rl;
rune_t *pwcs;
const char *s;
size_t n;
void *state;
{
_EUCTWState *ps;
rune_t rune;
int c, set;
/* rl appears to be unused */
/* pwcs may be NULL */
_DIAGASSERT(s != NULL);
_DIAGASSERT(state != NULL);
ps = state;
/* make sure we have the first byte in the buffer */
switch (ps->chlen) {
case 0:
if (n < 1)
return (size_t)-2;
ps->ch[0] = *s++;
ps->chlen = 1;
n--;
break;
case 1:
case 2:
break;
default:
/* illgeal state */
goto encoding_error;
}
c = _euc_count(set = _euc_set(ps->ch[0] & 0xff));
if (c == 0)
goto encoding_error;
while (ps->chlen < c) {
if (n < 1)
return (size_t)-2;
ps->ch[ps->chlen] = *s++;
ps->chlen++;
n--;
}
rune = 0;
switch (set) {
case 0:
if (ps->ch[0] & 0x80)
goto encoding_error;
rune = ps->ch[0] & 0xff;
break;
case 1:
if (!(ps->ch[0] & 0x80) || !(ps->ch[1] & 0x80))
goto encoding_error;
rune = ((ps->ch[0] & 0xff) << 8) | (ps->ch[1] & 0xff);
rune |= 'G' << 24;
break;
case 2:
if ((u_char)ps->ch[1] < 0xa1 || 0xa7 < (u_char)ps->ch[1])
goto encoding_error;
if (!(ps->ch[2] & 0x80) || !(ps->ch[3] & 0x80))
goto encoding_error;
rune = ((ps->ch[2] & 0xff) << 8) | (ps->ch[3] & 0xff);
rune |= ('G' + ps->ch[1] - 0xa1) << 24;
break;
default:
goto encoding_error;
}
ps->chlen = 0;
if (pwcs)
*pwcs = rune;
if (!rune)
return 0;
else
return c;
encoding_error:
ps->chlen = 0;
return (size_t)-1;
}
/* s is non-null */
size_t
_EUCTW_wcrtomb(rl, s, n, wc, state)
_RuneLocale *rl;
char *s;
size_t n;
const rune_t wc;
void *state;
{
rune_t cs = wc & 0x7f000080;
rune_t v;
int i, len, clen;
/* rl appears to be unused */
_DIAGASSERT(s != NULL);
/* state appears to be unused */
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)
goto notenough;
v = wc & 0x0000007f;
goto output;
}
if (clen == 2 && cs == ('G' << 24)) {
/* CNS-11643-1 */
len = 2;
if (n < len)
goto notenough;
v = wc & 0x00007f7f;
v |= 0x00008080;
goto output;
}
if (clen == 2 && 'H' <= (cs >> 24) && (cs >> 24) <= 'M') {
/* CNS-11643-[2-7] */
len = 4;
if (n < len)
goto notenough;
*s++ = _SS2;
*s++ = (cs >> 24) - 'H' + 0xa2;
v = wc & 0x00007f7f;
v |= 0x00008080;
goto output;
}
/* invalid sequence */
errno = EILSEQ; /*XXX*/
return (size_t)-1;
output:
i = clen;
while (i-- > 0)
*s++ = (v >> (i << 3)) & 0xff;
return len;
notenough:
/* bound check failure */
errno = EILSEQ; /*XXX*/
return (size_t)-1;
}
void
_EUCTW_initstate(rl, s)
_RuneLocale *rl;
void *s;
{
_EUCTWState *state;
/* rl appears to be unused */
if (!s)
return;
state = s;
memset(state, 0, sizeof(_EUCTWState));
}
void
_EUCTW_packstate(rl, dst, src)
_RuneLocale *rl;
mbstate_t *dst;
void* src;
{
/* rl appears to be unused */
_DIAGASSERT(dst != NULL);
_DIAGASSERT(src != NULL);
memcpy((caddr_t)dst, (caddr_t)src, sizeof(_EUCTWState));
return;
}
void
_EUCTW_unpackstate(rl, dst, src)
_RuneLocale *rl;
void* dst;
const mbstate_t *src;
{
/* rl appears to be unused */
_DIAGASSERT(dst != NULL);
_DIAGASSERT(src != NULL);
memcpy((caddr_t)dst, (caddr_t)src, sizeof(_EUCTWState));
return;
}