NetBSD-5.0.2/lib/libc/citrus/modules/citrus_viqr.c
/* $NetBSD: citrus_viqr.c,v 1.4 2008/06/14 16:01:08 tnozaki Exp $ */
/*-
* 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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_viqr.c,v 1.4 2008/06/14 16:01:08 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 <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_viqr.h"
#define ESCAPE '\\'
/*
* this table generated from RFC 1456.
*/
static const char *mnemonic_rfc1456[0x100] = {
NULL , NULL , "A(?", NULL , NULL , "A(~", "A^~", NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , "Y?" , NULL , NULL , NULL ,
NULL , "Y~" , NULL , NULL , NULL , NULL , "Y." , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
"A." , "A('", "A(`", "A(.", "A^'", "A^`", "A^?", "A^.",
"E~" , "E." , "E^'", "E^`", "E^?", "E^~", "E^.", "O^'",
"O^`", "O^?", "O^~", "O^.", "O+.", "O+'", "O+`", "O+?",
"I." , "O?" , "O." , "I?" , "U?" , "U~" , "U." , "Y`" ,
"O~" , "a('", "a(`", "a(.", "a^'", "a^`", "a^?", "a^.",
"e~" , "e." , "e^'", "e^`", "e^?", "e^~", "e^.", "o^'",
"o^`", "o^?", "o^~", "O+~", "O+" , "o^.", "o+`", "o+?",
"i." , "U+.", "U+'", "U+`", "U+?", "o+" , "o+'", "U+" ,
"A`" , "A'" , "A^" , "A~" , "A?" , "A(" , "a(?", "a(~",
"E`" , "E'" , "E^" , "E?" , "I`" , "I'" , "I~" , "y`" ,
"DD" , "u+'", "O`" , "O'" , "O^" , "a." , "y?" , "u+`",
"u+?", "U`" , "U'" , "y~" , "y." , "Y'" , "o+~", "u+" ,
"a`" , "a'" , "a^" , "a~" , "a?" , "a(" , "u+~", "a^~",
"e`" , "e'" , "e^" , "e?" , "i`" , "i'" , "i~" , "i?" ,
"dd" , "u+.", "o`" , "o'" , "o^" , "o~" , "o?" , "o." ,
"u." , "u`" , "u'" , "u~" , "u?" , "y'" , "o+.", "U+~",
};
typedef struct {
const char *name;
wchar_t value;
} mnemonic_def_t;
static const mnemonic_def_t mnemonic_ext[] = {
/* add extra mnemonic here (should be sorted by wchar_t order). */
};
static const size_t mnemonic_ext_size =
sizeof(mnemonic_ext) / sizeof(mnemonic_def_t);
static const char *
mnemonic_ext_find(wchar_t wc, const mnemonic_def_t *head, size_t n)
{
const mnemonic_def_t *mid;
_DIAGASSERT(head != NULL);
for (; n > 0; n >>= 1) {
mid = head + (n >> 1);
if (mid->value == wc) {
return mid->name;
} else if (mid->value < wc) {
head = mid + 1;
--n;
}
}
return NULL;
}
struct mnemonic_t;
typedef TAILQ_HEAD(mnemonic_list_t, mnemonic_t) mnemonic_list_t;
typedef struct mnemonic_t {
TAILQ_ENTRY(mnemonic_t) entry;
int ascii;
struct mnemonic_t *parent;
mnemonic_list_t child;
wchar_t value;
} mnemonic_t;
static mnemonic_t *
mnemonic_list_find(mnemonic_list_t *ml, int ch)
{
mnemonic_t *m;
_DIAGASSERT(ml != NULL);
TAILQ_FOREACH(m, ml, entry) {
if (m->ascii == ch)
return m;
}
return NULL;
}
static mnemonic_t *
mnemonic_create(mnemonic_t *parent, int ascii, wchar_t value)
{
mnemonic_t *m;
_DIAGASSERT(parent != NULL);
m = malloc(sizeof(*m));
if (m != NULL) {
m->parent = parent;
m->ascii = ascii;
m->value = value;
TAILQ_INIT(&m->child);
}
return m;
}
static int
mnemonic_append_child(mnemonic_t *m, const char *s,
wchar_t value, wchar_t invalid)
{
int ch;
mnemonic_t *m0;
_DIAGASSERT(m != NULL);
_DIAGASSERT(s != NULL);
ch = (unsigned char)*s++;
if (ch == '\0')
return EINVAL;
m0 = mnemonic_list_find(&m->child, ch);
if (m0 == NULL) {
m0 = mnemonic_create(m, ch, (wchar_t)ch);
if (m0 == NULL)
return ENOMEM;
TAILQ_INSERT_TAIL(&m->child, m0, entry);
}
m = m0;
for (m0 = NULL; (ch = (unsigned char)*s) != '\0'; ++s) {
m0 = mnemonic_list_find(&m->child, ch);
if (m0 == NULL) {
m0 = mnemonic_create(m, ch, invalid);
if (m0 == NULL)
return ENOMEM;
TAILQ_INSERT_TAIL(&m->child, m0, entry);
}
m = m0;
}
if (m0 == NULL)
return EINVAL;
m0->value = value;
return 0;
}
static void
mnemonic_destroy(mnemonic_t *m)
{
mnemonic_t *m0;
_DIAGASSERT(m != NULL);
TAILQ_FOREACH(m0, &m->child, entry)
mnemonic_destroy(m0);
free(m);
}
typedef struct {
size_t mb_cur_max;
wchar_t invalid;
mnemonic_t *mroot;
} _VIQREncodingInfo;
typedef struct {
int chlen;
char ch[MB_LEN_MAX];
} _VIQRState;
typedef struct {
_VIQREncodingInfo ei;
struct {
/* for future multi-locale facility */
_VIQRState s_mblen;
_VIQRState s_mbrlen;
_VIQRState s_mbrtowc;
_VIQRState s_mbtowc;
_VIQRState s_mbsrtowcs;
_VIQRState s_wcrtomb;
_VIQRState s_wcsrtombs;
_VIQRState s_wctomb;
} states;
} _VIQRCTypeInfo;
#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
#define _FUNCNAME(m) _citrus_VIQR_##m
#define _ENCODING_INFO _VIQREncodingInfo
#define _CTYPE_INFO _VIQRCTypeInfo
#define _ENCODING_STATE _VIQRState
#define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max
#define _ENCODING_IS_STATE_DEPENDENT 1
#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
static __inline void
/*ARGSUSED*/
_citrus_VIQR_init_state(_VIQREncodingInfo * __restrict ei,
_VIQRState * __restrict psenc)
{
/* ei may be unused */
_DIAGASSERT(psenc != NULL);
psenc->chlen = 0;
}
static __inline void
/*ARGSUSED*/
_citrus_VIQR_pack_state(_VIQREncodingInfo * __restrict ei,
void *__restrict pspriv, const _VIQRState * __restrict psenc)
{
/* ei may be unused */
_DIAGASSERT(pspriv != NULL);
_DIAGASSERT(psenc != NULL);
memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
}
static __inline void
/*ARGSUSED*/
_citrus_VIQR_unpack_state(_VIQREncodingInfo * __restrict ei,
_VIQRState * __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_VIQR_mbrtowc_priv(_VIQREncodingInfo * __restrict ei,
wchar_t * __restrict pwc, const char ** __restrict s, size_t n,
_VIQRState * __restrict psenc, size_t * __restrict nresult)
{
const char *s0;
wchar_t wc;
mnemonic_t *m, *m0;
size_t i;
int ch, escape;
_DIAGASSERT(ei != NULL);
/* pwc may be null */
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(nresult != NULL);
if (*s == NULL) {
_citrus_VIQR_init_state(ei, psenc);
*nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT;
return 0;
}
s0 = *s;
i = 0;
m = ei->mroot;
for (escape = 0;;) {
if (psenc->chlen == i) {
if (n-- < 1) {
*s = s0;
*nresult = (size_t)-2;
return 0;
}
psenc->ch[psenc->chlen++] = *s0++;
}
ch = (unsigned char)psenc->ch[i++];
if (ch == ESCAPE) {
if (m != ei->mroot)
break;
escape = 1;
continue;
}
if (escape != 0)
break;
m0 = mnemonic_list_find(&m->child, ch);
if (m0 == NULL)
break;
m = m0;
}
while (m != ei->mroot) {
--i;
if (m->value != ei->invalid)
break;
m = m->parent;
}
if (ch == ESCAPE && m != ei->mroot)
++i;
psenc->chlen -= i;
memmove(&psenc->ch[0], &psenc->ch[i], psenc->chlen);
wc = (m == ei->mroot) ? (wchar_t)ch : m->value;
if (pwc != NULL)
*pwc = wc;
*nresult = (size_t)(wc == 0 ? 0 : s0 - *s);
*s = s0;
return 0;
}
static int
_citrus_VIQR_wcrtomb_priv(_VIQREncodingInfo * __restrict ei,
char * __restrict s, size_t n, wchar_t wc,
_VIQRState * __restrict psenc, size_t * __restrict nresult)
{
mnemonic_t *m;
int ch, escape;
const char *p;
_DIAGASSERT(ei != NULL);
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(nresult != NULL);
switch (psenc->chlen) {
case 0: case 1:
break;
default:
return EINVAL;
}
m = NULL;
if ((uint32_t)wc <= 0xFF) {
p = mnemonic_rfc1456[wc & 0xFF];
if (p != NULL)
goto mnemonic_found;
if (n-- < 1)
goto e2big;
ch = (unsigned int)wc;
m = ei->mroot;
if (psenc->chlen > 0) {
m = mnemonic_list_find(&m->child, psenc->ch[0]);
if (m == NULL)
return EINVAL;
psenc->ch[0] = ESCAPE;
}
if (mnemonic_list_find(&m->child, ch) == NULL) {
psenc->chlen = 0;
m = NULL;
}
psenc->ch[psenc->chlen++] = ch;
} else {
p = mnemonic_ext_find(wc, &mnemonic_ext[0], mnemonic_ext_size);
if (p == NULL) {
*nresult = (size_t)-1;
return EILSEQ;
} else {
mnemonic_found:
psenc->chlen = 0;
while (*p != '\0') {
if (n-- < 1)
goto e2big;
psenc->ch[psenc->chlen++] = *p++;
}
}
}
memcpy(s, psenc->ch, psenc->chlen);
*nresult = psenc->chlen;
if (m == ei->mroot) {
psenc->ch[0] = ch;
psenc->chlen = 1;
} else {
psenc->chlen = 0;
}
return 0;
e2big:
*nresult = (size_t)-1;
return E2BIG;
}
static int
/* ARGSUSED */
_citrus_VIQR_put_state_reset(_VIQREncodingInfo * __restrict ei,
char * __restrict s, size_t n, _VIQRState * __restrict psenc,
size_t * __restrict nresult)
{
/* ei may be unused */
_DIAGASSERT(s != NULL);
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(nresult != NULL);
switch (psenc->chlen) {
case 0: case 1:
break;
default:
return EINVAL;
}
*nresult = 0;
psenc->chlen = 0;
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_VIQR_stdenc_wctocs(_VIQREncodingInfo * __restrict ei,
_csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
{
/* ei may be unused */
_DIAGASSERT(csid != NULL);
_DIAGASSERT(idx != NULL);
*csid = 0;
*idx = (_index_t)wc;
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_VIQR_stdenc_cstowc(_VIQREncodingInfo * __restrict ei,
wchar_t * __restrict pwc, _csid_t csid, _index_t idx)
{
/* ei may be unused */
_DIAGASSERT(pwc != NULL);
if (csid != 0)
return EILSEQ;
*pwc = (wchar_t)idx;
return 0;
}
static void
_citrus_VIQR_encoding_module_uninit(_VIQREncodingInfo *ei)
{
_DIAGASSERT(ei != NULL);
mnemonic_destroy(ei->mroot);
}
static int
/*ARGSUSED*/
_citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei,
const void * __restrict var, size_t lenvar)
{
int errnum;
const char *s;
size_t i, n;
const mnemonic_def_t *p;
_DIAGASSERT(ei != NULL);
/* var may be unused */
ei->mb_cur_max = 1;
ei->invalid = (wchar_t)-1;
ei->mroot = mnemonic_create(NULL, '\0', ei->invalid);
if (ei->mroot == NULL)
return ENOMEM;
for (i = 0; i < sizeof(mnemonic_rfc1456) / sizeof(const char *); ++i) {
s = mnemonic_rfc1456[i];
if (s == NULL)
continue;
n = strlen(s);
_DIAGASSERT(n <= MB_LEN_MAX);
if (ei->mb_cur_max < n)
ei->mb_cur_max = n;
errnum = mnemonic_append_child(ei->mroot,
s, (wchar_t)i, ei->invalid);
if (errnum != 0) {
_citrus_VIQR_encoding_module_uninit(ei);
return errnum;
}
}
for (i = 0; i < mnemonic_ext_size; ++i) {
p = &mnemonic_ext[i];
_DIAGASSERT(p != NULL && p->name != NULL);
n = strlen(p->name);
_DIAGASSERT(n <= MB_LEN_MAX);
if (ei->mb_cur_max < n)
ei->mb_cur_max = n;
errnum = mnemonic_append_child(ei->mroot,
p->name, p->value, ei->invalid);
if (errnum != 0) {
_citrus_VIQR_encoding_module_uninit(ei);
return errnum;
}
}
return 0;
}
static __inline int
/*ARGSUSED*/
_citrus_VIQR_stdenc_get_state_desc_generic(_VIQREncodingInfo * __restrict ei,
_VIQRState * __restrict psenc, int * __restrict rstate)
{
/* ei may be unused */
_DIAGASSERT(psenc != NULL);
_DIAGASSERT(rstate != NULL);
*rstate = (psenc->chlen == 0)
? _STDENC_SDGEN_INITIAL
: _STDENC_SDGEN_INCOMPLETE_CHAR;
return 0;
}
/* ----------------------------------------------------------------------
* public interface for ctype
*/
_CITRUS_CTYPE_DECLS(VIQR);
_CITRUS_CTYPE_DEF_OPS(VIQR);
#include "citrus_ctype_template.h"
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(VIQR);
_CITRUS_STDENC_DEF_OPS(VIQR);
#include "citrus_stdenc_template.h"