NetBSD-5.0.2/lib/libc/citrus/modules/citrus_zw.c
/* $NetBSD: citrus_zw.c,v 1.4 2008/06/14 16:01:08 tnozaki Exp $ */
/*-
* Copyright (c)2004, 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>
#if defined(LIB_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_zw.c,v 1.4 2008/06/14 16:01:08 tnozaki Exp $");
#endif /* LIB_SCCS and not lint */
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stddef.h>
#include <wchar.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_zw.h"
/* ----------------------------------------------------------------------
* private stuffs used by templates
*/
typedef struct {
int dummy;
} _ZWEncodingInfo;
typedef enum {
NONE, AMBIGIOUS, ASCII, GB2312
} _ZWCharset;
typedef struct {
int chlen;
char ch[4];
_ZWCharset charset;
} _ZWState;
typedef struct {
_ZWEncodingInfo ei;
struct {
/* for future multi-locale facility */
_ZWState s_mblen;
_ZWState s_mbrlen;
_ZWState s_mbrtowc;
_ZWState s_mbtowc;
_ZWState s_mbsrtowcs;
_ZWState s_wcrtomb;
_ZWState s_wcsrtombs;
_ZWState s_wctomb;
} states;
} _ZWCTypeInfo;
#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
#define _FUNCNAME(m) _citrus_ZW_##m
#define _ENCODING_INFO _ZWEncodingInfo
#define _CTYPE_INFO _ZWCTypeInfo
#define _ENCODING_STATE _ZWState
#define _ENCODING_MB_CUR_MAX(_ei_) MB_LEN_MAX
#define _ENCODING_IS_STATE_DEPENDENT 1
#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) ((_ps_)->charset != NONE)
static __inline void
/*ARGSUSED*/
_citrus_ZW_init_state(_ZWEncodingInfo * __restrict ei,
_ZWState * __restrict psenc)
{
/* ei my be unused */
_DIAGASSERT(psenc != NULL);
psenc->chlen = 0;
psenc->charset = NONE;
}
static __inline void
/*ARGSUSED*/
_citrus_ZW_pack_state(_ZWEncodingInfo * __restrict ei,
void *__restrict pspriv, const _ZWState * __restrict psenc)
{
/* ei may be unused */
_DIAGASSERT(pspriv != NULL);
_DIAGASSERT(psenc != NULL);
memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
}
static __inline void
/*ARGSUSED*/
_citrus_ZW_unpack_state(_ZWEncodingInfo * __restrict ei,
_ZWState * __restrict psenc, const void * __restrict pspriv)
{
/* ei may be unused */
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(pspriv != NULL);
memcpy((void *)psenc, pspriv, sizeof(*psenc));
}
static int
_citrus_ZW_mbrtowc_priv(_ZWEncodingInfo * __restrict ei,
wchar_t * __restrict pwc, const char **__restrict s, size_t n,
_ZWState * __restrict psenc, size_t * __restrict nresult)
{
const char *s0;
int ch, len;
wchar_t wc;
/* ei may be unused */
/* pwc may be null */
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(nresult != NULL);
if (*s == NULL) {
_citrus_ZW_init_state(ei, psenc);
*nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT;
return 0;
}
s0 = *s;
len = 0;
#define STORE \
do { \
if (n-- < 1) { \
*nresult = (size_t)-2; \
*s = s0; \
return 0; \
} \
ch = (unsigned char)*s0++; \
if (len++ > MB_LEN_MAX || ch > 0x7F)\
goto ilseq; \
psenc->ch[psenc->chlen++] = ch; \
} while (/*CONSTCOND*/0)
loop:
switch (psenc->charset) {
case ASCII:
switch (psenc->chlen) {
case 0:
STORE;
switch (psenc->ch[0]) {
case '\0': case '\n':
psenc->charset = NONE;
}
/*FALLTHROUGH*/
case 1:
break;
default:
return EINVAL;
}
ch = (unsigned char)psenc->ch[0];
if (ch > 0x7F)
goto ilseq;
wc = (wchar_t)ch;
psenc->chlen = 0;
break;
case NONE:
if (psenc->chlen != 0)
return EINVAL;
STORE;
ch = (unsigned char)psenc->ch[0];
if (ch != 'z') {
if (ch != '\n' && ch != '\0')
psenc->charset = ASCII;
wc = (wchar_t)ch;
psenc->chlen = 0;
break;
}
psenc->charset = AMBIGIOUS;
psenc->chlen = 0;
/* FALLTHROUGH */
case AMBIGIOUS:
if (psenc->chlen != 0)
return EINVAL;
STORE;
if (psenc->ch[0] != 'W') {
psenc->charset = ASCII;
wc = L'z';
break;
}
psenc->charset = GB2312;
psenc->chlen = 0;
/* FALLTHROUGH */
case GB2312:
switch (psenc->chlen) {
case 0:
STORE;
ch = (unsigned char)psenc->ch[0];
if (ch == '\0') {
psenc->charset = NONE;
wc = (wchar_t)ch;
psenc->chlen = 0;
break;
} else if (ch == '\n') {
psenc->charset = NONE;
psenc->chlen = 0;
goto loop;
}
/*FALLTHROUGH*/
case 1:
STORE;
if (psenc->ch[0] == ' ') {
ch = (unsigned char)psenc->ch[1];
wc = (wchar_t)ch;
psenc->chlen = 0;
break;
} else if (psenc->ch[0] == '#') {
ch = (unsigned char)psenc->ch[1];
if (ch == '\n') {
psenc->charset = NONE;
wc = (wchar_t)ch;
psenc->chlen = 0;
break;
} else if (ch == ' ') {
wc = (wchar_t)ch;
psenc->chlen = 0;
break;
}
}
ch = (unsigned char)psenc->ch[0];
if (ch < 0x21 || ch > 0x7E)
goto ilseq;
wc = (wchar_t)(ch << 8);
ch = (unsigned char)psenc->ch[1];
if (ch < 0x21 || ch > 0x7E) {
ilseq:
*nresult = (size_t)-1;
return EILSEQ;
}
wc |= (wchar_t)ch;
psenc->chlen = 0;
break;
default:
return EINVAL;
}
break;
default:
return EINVAL;
}
if (pwc != NULL)
*pwc = wc;
*nresult = (size_t)(wc == 0 ? 0 : len);
*s = s0;
return 0;
}
static int
/*ARGSUSED*/
_citrus_ZW_wcrtomb_priv(_ZWEncodingInfo * __restrict ei,
char *__restrict s, size_t n, wchar_t wc,
_ZWState * __restrict psenc, size_t * __restrict nresult)
{
int ch;
/* ei may be null */
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(nresult != NULL);
if (psenc->chlen != 0)
return EINVAL;
if ((uint32_t)wc <= 0x7F) {
ch = (unsigned char)wc;
switch (psenc->charset) {
case NONE:
if (ch == '\0' || ch == '\n') {
psenc->ch[psenc->chlen++] = ch;
} else {
if (n < 4)
return E2BIG;
n -= 4;
psenc->ch[psenc->chlen++] = 'z';
psenc->ch[psenc->chlen++] = 'W';
psenc->ch[psenc->chlen++] = ' ';
psenc->ch[psenc->chlen++] = ch;
psenc->charset = GB2312;
}
break;
case GB2312:
if (n < 2)
return E2BIG;
n -= 2;
if (ch == '\0') {
psenc->ch[psenc->chlen++] = '\n';
psenc->ch[psenc->chlen++] = '\0';
psenc->charset = NONE;
} else if (ch == '\n') {
psenc->ch[psenc->chlen++] = '#';
psenc->ch[psenc->chlen++] = '\n';
psenc->charset = NONE;
} else {
psenc->ch[psenc->chlen++] = ' ';
psenc->ch[psenc->chlen++] = ch;
}
break;
default:
return EINVAL;
}
} else if ((uint32_t)wc <= 0x7E7E) {
switch (psenc->charset) {
case NONE:
if (n < 2)
return E2BIG;
n -= 2;
psenc->ch[psenc->chlen++] = 'z';
psenc->ch[psenc->chlen++] = 'W';
psenc->charset = GB2312;
/* FALLTHROUGH*/
case GB2312:
if (n < 2)
return E2BIG;
n -= 2;
ch = (wc >> 8) & 0xFF;
if (ch < 0x21 || ch > 0x7E)
goto ilseq;
psenc->ch[psenc->chlen++] = ch;
ch = wc & 0xFF;
if (ch < 0x21 || ch > 0x7E)
goto ilseq;
psenc->ch[psenc->chlen++] = ch;
break;
default:
return EINVAL;
}
} else {
ilseq:
*nresult = (size_t)-1;
return EILSEQ;
}
memcpy(s, psenc->ch, psenc->chlen);
*nresult = psenc->chlen;
psenc->chlen = 0;
return 0;
}
static int
/*ARGSUSED*/
_citrus_ZW_put_state_reset(_ZWEncodingInfo * __restrict ei,
char * __restrict s, size_t n,
_ZWState * __restrict psenc, size_t * __restrict nresult)
{
/* ei may be unused */
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(nresult != NULL);
if (psenc->chlen != 0)
return EINVAL;
switch (psenc->charset) {
case GB2312:
if (n-- < 1)
return E2BIG;
psenc->ch[psenc->chlen++] = '\n';
psenc->charset = NONE;
/*FALLTHROUGH*/
case NONE:
*nresult = psenc->chlen;
if (psenc->chlen > 0) {
memcpy(s, psenc->ch, psenc->chlen);
psenc->chlen = 0;
}
break;
default:
return EINVAL;
}
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_ZW_stdenc_get_state_desc_generic(_ZWEncodingInfo * __restrict ei,
_ZWState * __restrict psenc, int * __restrict rstate)
{
/* ei may be unused */
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(rstate != NULL);
switch (psenc->charset) {
case NONE:
if (psenc->chlen != 0)
return EINVAL;
*rstate = _STDENC_SDGEN_INITIAL;
break;
case AMBIGIOUS:
if (psenc->chlen != 0)
return EINVAL;
*rstate = _STDENC_SDGEN_INCOMPLETE_SHIFT;
break;
case ASCII:
case GB2312:
switch (psenc->chlen) {
case 0:
*rstate = _STDENC_SDGEN_STABLE;
break;
case 1:
*rstate = (psenc->ch[0] == '#')
? _STDENC_SDGEN_INCOMPLETE_SHIFT
: _STDENC_SDGEN_INCOMPLETE_CHAR;
break;
default:
return EINVAL;
}
break;
default:
return EINVAL;
}
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_ZW_stdenc_wctocs(_ZWEncodingInfo * __restrict ei,
_csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
{
/* ei seems to be unused */
_DIAGASSERT(csid != NULL);
_DIAGASSERT(idx != NULL);
*csid = (_csid_t)(wc <= 0x7FU) ? 0 : 1;
*idx = (_index_t)wc;
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_ZW_stdenc_cstowc(_ZWEncodingInfo * __restrict ei,
wchar_t * __restrict wc, _csid_t csid, _index_t idx)
{
/* ei seems to be unused */
_DIAGASSERT(wc != NULL);
switch (csid) {
case 0: case 1:
break;
default:
return EINVAL;
}
*wc = (wchar_t)idx;
return 0;
}
static void
/*ARGSUSED*/
_citrus_ZW_encoding_module_uninit(_ZWEncodingInfo *ei)
{
}
static int
/*ARGSUSED*/
_citrus_ZW_encoding_module_init(_ZWEncodingInfo * __restrict ei,
const void *__restrict var, size_t lenvar)
{
return 0;
}
/* ----------------------------------------------------------------------
* public interface for ctype
*/
_CITRUS_CTYPE_DECLS(ZW);
_CITRUS_CTYPE_DEF_OPS(ZW);
#include "citrus_ctype_template.h"
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(ZW);
_CITRUS_STDENC_DEF_OPS(ZW);
#include "citrus_stdenc_template.h"