/* $NetBSD: citrus_johab.c,v 1.4 2008/06/14 16:01:07 tnozaki Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c)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.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_bcs.h"
#include "citrus_module.h"
#include "citrus_stdenc.h"
#include "citrus_johab.h"
/* ----------------------------------------------------------------------
* private stuffs used by templates
*/
typedef struct {
int chlen;
char ch[2];
} _JOHABState;
typedef struct {
int dummy;
} _JOHABEncodingInfo;
#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
#define _FUNCNAME(m) _citrus_JOHAB_##m
#define _ENCODING_INFO _JOHABEncodingInfo
#define _ENCODING_STATE _JOHABState
#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_JOHAB_init_state(_JOHABEncodingInfo * __restrict ei __unused,
_JOHABState * __restrict psenc)
{
psenc->chlen = 0;
}
#if 0
static __inline void
/*ARGSUSED*/
_citrus_JOHAB_pack_state(_JOHABEncodingInfo * __restrict ei __unused,
void * __restrict pspriv, const _JOHABState * __restrict psenc)
{
memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
}
static __inline void
/*ARGSUSED*/
_citrus_JOHAB_unpack_state(_JOHABEncodingInfo * __restrict ei __unused,
_JOHABState * __restrict psenc, const void * __restrict pspriv)
{
memcpy((void *)psenc, pspriv, sizeof(*psenc));
}
#endif
static void
/*ARGSUSED*/
_citrus_JOHAB_encoding_module_uninit(_JOHABEncodingInfo *ei __unused)
{
/* ei may be null */
}
static int
/*ARGSUSED*/
_citrus_JOHAB_encoding_module_init(_JOHABEncodingInfo * __restrict ei __unused,
const void * __restrict var __unused, size_t lenvar __unused)
{
/* ei may be null */
return (0);
}
static __inline bool
ishangul(int l, int t)
{
return ((l >= 0x84 && l <= 0xD3) &&
((t >= 0x41 && t <= 0x7E) || (t >= 0x81 && t <= 0xFE)));
}
static __inline bool
isuda(int l, int t)
{
return ((l == 0xD8) &&
((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE)));
}
static __inline bool
ishanja(int l, int t)
{
return (((l >= 0xD9 && l <= 0xDE) || (l >= 0xE0 && l <= 0xF9)) &&
((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE)));
}
static int
/*ARGSUSED*/
_citrus_JOHAB_mbrtowc_priv(_JOHABEncodingInfo * __restrict ei,
wchar_t * __restrict pwc, char ** __restrict s, size_t n,
_JOHABState * __restrict psenc, size_t * __restrict nresult)
{
char *s0;
int l, t;
if (*s == NULL) {
_citrus_JOHAB_init_state(ei, psenc);
*nresult = _ENCODING_IS_STATE_DEPENDENT;
return (0);
}
s0 = *s;
switch (psenc->chlen) {
case 0:
if (n-- < 1)
goto restart;
l = *s0++ & 0xFF;
if (l <= 0x7F) {
if (pwc != NULL)
*pwc = (wchar_t)l;
*nresult = (l == 0) ? 0 : 1;
*s = s0;
return (0);
}
psenc->ch[psenc->chlen++] = l;
break;
case 1:
l = psenc->ch[0] & 0xFF;
break;
default:
return (EINVAL);
}
if (n-- < 1) {
restart:
*nresult = (size_t)-2;
*s = s0;
return (0);
}
t = *s0++ & 0xFF;
if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t)) {
*nresult = (size_t)-1;
return (EILSEQ);
}
if (pwc != NULL)
*pwc = (wchar_t)(l << 8 | t);
*nresult = s0 - *s;
*s = s0;
psenc->chlen = 0;
return (0);
}
static int
/*ARGSUSED*/
_citrus_JOHAB_wcrtomb_priv(_JOHABEncodingInfo * __restrict ei __unused,
char * __restrict s, size_t n, wchar_t wc,
_JOHABState * __restrict psenc, size_t * __restrict nresult)
{
int l, t;
if (psenc->chlen != 0)
return (EINVAL);
/* XXX assume wchar_t as int */
if ((uint32_t)wc <= 0x7F) {
if (n < 1)
goto e2big;
*s = wc & 0xFF;
*nresult = 1;
} else if ((uint32_t)wc <= 0xFFFF) {
if (n < 2) {
e2big:
*nresult = (size_t)-1;
return (E2BIG);
}
l = (wc >> 8) & 0xFF;
t = wc & 0xFF;
if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t))
goto ilseq;
*s++ = l;
*s = t;
*nresult = 2;
} else {
ilseq:
*nresult = (size_t)-1;
return (EILSEQ);
}
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_JOHAB_stdenc_wctocs(_JOHABEncodingInfo * __restrict ei __unused,
_csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
{
int m, l, linear, t;
/* XXX assume wchar_t as int */
if ((uint32_t)wc <= 0x7F) {
*idx = (_index_t)wc;
*csid = 0;
} else if ((uint32_t)wc <= 0xFFFF) {
l = (wc >> 8) & 0xFF;
t = wc & 0xFF;
if (ishangul(l, t) || isuda(l, t)) {
*idx = (_index_t)wc;
*csid = 1;
} else {
if (l >= 0xD9 && l <= 0xDE) {
linear = l - 0xD9;
m = 0x21;
} else if (l >= 0xE0 && l <= 0xF9) {
linear = l - 0xE0;
m = 0x4A;
} else
return (EILSEQ);
linear *= 188;
if (t >= 0x31 && t <= 0x7E)
linear += t - 0x31;
else if (t >= 0x91 && t <= 0xFE)
linear += t - 0x43;
else
return (EILSEQ);
l = (linear / 94) + m;
t = (linear % 94) + 0x21;
*idx = (_index_t)((l << 8) | t);
*csid = 2;
}
} else
return (EILSEQ);
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_JOHAB_stdenc_cstowc(_JOHABEncodingInfo * __restrict ei __unused,
wchar_t * __restrict wc, _csid_t csid, _index_t idx)
{
int m, n, l, linear, t;
switch (csid) {
case 0:
case 1:
*wc = (wchar_t)idx;
break;
case 2:
if (idx >= 0x2121 && idx <= 0x2C71) {
m = 0xD9;
n = 0x21;
} else if (idx >= 0x4A21 && idx <= 0x7D7E) {
m = 0xE0;
n = 0x4A;
} else
return (EILSEQ);
l = ((idx >> 8) & 0xFF) - n;
t = (idx & 0xFF) - 0x21;
linear = (l * 94) + t;
l = (linear / 188) + m;
t = linear % 188;
t += (t <= 0x4D) ? 0x31 : 0x43;
break;
default:
return (EILSEQ);
}
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_JOHAB_stdenc_get_state_desc_generic(_JOHABEncodingInfo * __restrict ei __unused,
_JOHABState * __restrict psenc, int * __restrict rstate)
{
*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
_STDENC_SDGEN_INCOMPLETE_CHAR;
return (0);
}
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(JOHAB);
_CITRUS_STDENC_DEF_OPS(JOHAB);
#include "citrus_stdenc_template.h"
plain