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| Current File : //usr/src/lib/libiconv_modules/ISO2022/citrus_iso2022.c |
/* $FreeBSD: release/9.1.0/lib/libiconv_modules/ISO2022/citrus_iso2022.c 219019 2011-02-25 00:04:39Z gabor $ */
/* $NetBSD: citrus_iso2022.c,v 1.19 2008/06/14 16:01:07 tnozaki Exp $ */
/*-
* Copyright (c)1999, 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.
*
* $Citrus: xpg4dl/FreeBSD/lib/libc/locale/iso2022.c,v 1.23 2001/06/21 01:51:44 yamt Exp $
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_module.h"
#include "citrus_stdenc.h"
#include "citrus_iso2022.h"
/* ----------------------------------------------------------------------
* private stuffs used by templates
*/
/*
* wchar_t mappings:
* ASCII (ESC ( B) 00000000 00000000 00000000 0xxxxxxx
* iso-8859-1 (ESC , A) 00000000 00000000 00000000 1xxxxxxx
* 94 charset (ESC ( F) 0fffffff 00000000 00000000 0xxxxxxx
* 94 charset (ESC ( M F) 0fffffff 1mmmmmmm 00000000 0xxxxxxx
* 96 charset (ESC , F) 0fffffff 00000000 00000000 1xxxxxxx
* 96 charset (ESC , M F) 0fffffff 1mmmmmmm 00000000 1xxxxxxx
* 94x94 charset (ESC $ ( F) 0fffffff 00000000 0xxxxxxx 0xxxxxxx
* 96x96 charset (ESC $ , F) 0fffffff 00000000 0xxxxxxx 1xxxxxxx
* 94x94 charset (ESC & V ESC $ ( F)
* 0fffffff 1vvvvvvv 0xxxxxxx 0xxxxxxx
* 94x94x94 charset (ESC $ ( F) 0fffffff 0xxxxxxx 0xxxxxxx 0xxxxxxx
* 96x96x96 charset (ESC $ , F) 0fffffff 0xxxxxxx 0xxxxxxx 1xxxxxxx
* reserved for UCS4 co-existence (UCS4 is 31bit encoding thanks to mohta bit)
* 1xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
*/
#define CS94 (0U)
#define CS96 (1U)
#define CS94MULTI (2U)
#define CS96MULTI (3U)
typedef struct {
unsigned char interm;
unsigned char final;
unsigned char type;
unsigned char vers;
} _ISO2022Charset;
static const _ISO2022Charset ascii = { CS94, 'B', '\0', '\0' };
static const _ISO2022Charset iso88591 = { CS96, 'A', '\0', '\0' };
typedef struct {
_ISO2022Charset g[4];
/* need 3 bits to hold -1, 0, ..., 3 */
int gl:3,
gr:3,
singlegl:3,
singlegr:3;
char ch[7]; /* longest escape sequence (ESC & V ESC $ ( F) */
size_t chlen;
int flags;
#define _ISO2022STATE_FLAG_INITIALIZED 1
} _ISO2022State;
typedef struct {
_ISO2022Charset *recommend[4];
size_t recommendsize[4];
_ISO2022Charset initg[4];
int maxcharset;
int flags;
#define F_8BIT 0x0001
#define F_NOOLD 0x0002
#define F_SI 0x0010 /*0F*/
#define F_SO 0x0020 /*0E*/
#define F_LS0 0x0010 /*0F*/
#define F_LS1 0x0020 /*0E*/
#define F_LS2 0x0040 /*ESC n*/
#define F_LS3 0x0080 /*ESC o*/
#define F_LS1R 0x0100 /*ESC ~*/
#define F_LS2R 0x0200 /*ESC }*/
#define F_LS3R 0x0400 /*ESC |*/
#define F_SS2 0x0800 /*ESC N*/
#define F_SS3 0x1000 /*ESC O*/
#define F_SS2R 0x2000 /*8E*/
#define F_SS3R 0x4000 /*8F*/
} _ISO2022EncodingInfo;
#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
#define _FUNCNAME(m) _citrus_ISO2022_##m
#define _ENCODING_INFO _ISO2022EncodingInfo
#define _ENCODING_STATE _ISO2022State
#define _ENCODING_MB_CUR_MAX(_ei_) MB_LEN_MAX
#define _ENCODING_IS_STATE_DEPENDENT 1
#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) \
(!((_ps_)->flags & _ISO2022STATE_FLAG_INITIALIZED))
#define _ISO2022INVALID (wchar_t)-1
static __inline bool isc0(__uint8_t x)
{
return ((x & 0x1f) == x);
}
static __inline bool isc1(__uint8_t x)
{
return (0x80 <= x && x <= 0x9f);
}
static __inline bool iscntl(__uint8_t x)
{
return (isc0(x) || isc1(x) || x == 0x7f);
}
static __inline bool is94(__uint8_t x)
{
return (0x21 <= x && x <= 0x7e);
}
static __inline bool is96(__uint8_t x)
{
return (0x20 <= x && x <= 0x7f);
}
static __inline bool isecma(__uint8_t x)
{
return (0x30 <= x && x <= 0x7f);
}
static __inline bool isinterm(__uint8_t x)
{
return (0x20 <= x && x <= 0x2f);
}
static __inline bool isthree(__uint8_t x)
{
return (0x60 <= x && x <= 0x6f);
}
static __inline int
getcs(const char * __restrict p, _ISO2022Charset * __restrict cs)
{
if (!strncmp(p, "94$", 3) && p[3] && !p[4]) {
cs->final = (unsigned char)(p[3] & 0xff);
cs->interm = '\0';
cs->vers = '\0';
cs->type = CS94MULTI;
} else if (!strncmp(p, "96$", 3) && p[3] && !p[4]) {
cs->final = (unsigned char)(p[3] & 0xff);
cs->interm = '\0';
cs->vers = '\0';
cs->type = CS96MULTI;
} else if (!strncmp(p, "94", 2) && p[2] && !p[3]) {
cs->final = (unsigned char)(p[2] & 0xff);
cs->interm = '\0';
cs->vers = '\0';
cs->type = CS94;
} else if (!strncmp(p, "96", 2) && p[2] && !p[3]) {
cs->final = (unsigned char )(p[2] & 0xff);
cs->interm = '\0';
cs->vers = '\0';
cs->type = CS96;
} else
return (1);
return (0);
}
#define _NOTMATCH 0
#define _MATCH 1
#define _PARSEFAIL 2
static __inline int
get_recommend(_ISO2022EncodingInfo * __restrict ei,
const char * __restrict token)
{
_ISO2022Charset cs, *p;
int i;
if (!strchr("0123", token[0]) || token[1] != '=')
return (_NOTMATCH);
if (getcs(&token[2], &cs) == 0)
;
else if (!strcmp(&token[2], "94")) {
cs.final = (unsigned char)(token[4]);
cs.interm = '\0';
cs.vers = '\0';
cs.type = CS94;
} else if (!strcmp(&token[2], "96")) {
cs.final = (unsigned char)(token[4]);
cs.interm = '\0';
cs.vers = '\0';
cs.type = CS96;
} else if (!strcmp(&token[2], "94$")) {
cs.final = (unsigned char)(token[5]);
cs.interm = '\0';
cs.vers = '\0';
cs.type = CS94MULTI;
} else if (!strcmp(&token[2], "96$")) {
cs.final = (unsigned char)(token[5]);
cs.interm = '\0';
cs.vers = '\0';
cs.type = CS96MULTI;
} else
return (_PARSEFAIL);
i = token[0] - '0';
if (!ei->recommend[i])
ei->recommend[i] = malloc(sizeof(_ISO2022Charset));
else {
p = realloc(ei->recommend[i],
sizeof(_ISO2022Charset) * (ei->recommendsize[i] + 1));
if (!p)
return (_PARSEFAIL);
ei->recommend[i] = p;
}
if (!ei->recommend[i])
return (_PARSEFAIL);
ei->recommendsize[i]++;
(ei->recommend[i] + (ei->recommendsize[i] - 1))->final = cs.final;
(ei->recommend[i] + (ei->recommendsize[i] - 1))->interm = cs.interm;
(ei->recommend[i] + (ei->recommendsize[i] - 1))->vers = cs.vers;
(ei->recommend[i] + (ei->recommendsize[i] - 1))->type = cs.type;
return (_MATCH);
}
static __inline int
get_initg(_ISO2022EncodingInfo * __restrict ei,
const char * __restrict token)
{
_ISO2022Charset cs;
if (strncmp("INIT", &token[0], 4) ||
!strchr("0123", token[4]) ||
token[5] != '=')
return (_NOTMATCH);
if (getcs(&token[6], &cs) != 0)
return (_PARSEFAIL);
ei->initg[token[4] - '0'].type = cs.type;
ei->initg[token[4] - '0'].final = cs.final;
ei->initg[token[4] - '0'].interm = cs.interm;
ei->initg[token[4] - '0'].vers = cs.vers;
return (_MATCH);
}
static __inline int
get_max(_ISO2022EncodingInfo * __restrict ei,
const char * __restrict token)
{
if (!strcmp(token, "MAX1"))
ei->maxcharset = 1;
else if (!strcmp(token, "MAX2"))
ei->maxcharset = 2;
else if (!strcmp(token, "MAX3"))
ei->maxcharset = 3;
else
return (_NOTMATCH);
return (_MATCH);
}
static __inline int
get_flags(_ISO2022EncodingInfo * __restrict ei,
const char * __restrict token)
{
static struct {
const char *tag;
int flag;
} const tags[] = {
{ "DUMMY", 0 },
{ "8BIT", F_8BIT },
{ "NOOLD", F_NOOLD },
{ "SI", F_SI },
{ "SO", F_SO },
{ "LS0", F_LS0 },
{ "LS1", F_LS1 },
{ "LS2", F_LS2 },
{ "LS3", F_LS3 },
{ "LS1R", F_LS1R },
{ "LS2R", F_LS2R },
{ "LS3R", F_LS3R },
{ "SS2", F_SS2 },
{ "SS3", F_SS3 },
{ "SS2R", F_SS2R },
{ "SS3R", F_SS3R },
{ NULL, 0 }
};
int i;
for (i = 0; tags[i].tag; i++)
if (!strcmp(token, tags[i].tag)) {
ei->flags |= tags[i].flag;
return (_MATCH);
}
return (_NOTMATCH);
}
static __inline int
_citrus_ISO2022_parse_variable(_ISO2022EncodingInfo * __restrict ei,
const void * __restrict var, size_t lenvar __unused)
{
char const *e, *v;
char buf[20];
size_t len;
int i, ret;
/*
* parse VARIABLE section.
*/
if (!var)
return (EFTYPE);
v = (const char *) var;
/* initialize structure */
ei->maxcharset = 0;
for (i = 0; i < 4; i++) {
ei->recommend[i] = NULL;
ei->recommendsize[i] = 0;
}
ei->flags = 0;
while (*v) {
while (*v == ' ' || *v == '\t')
++v;
/* find the token */
e = v;
while (*e && *e != ' ' && *e != '\t')
++e;
len = e - v;
if (len == 0)
break;
if (len >= sizeof(buf))
goto parsefail;
snprintf(buf, sizeof(buf), "%.*s", (int)len, v);
if ((ret = get_recommend(ei, buf)) != _NOTMATCH)
;
else if ((ret = get_initg(ei, buf)) != _NOTMATCH)
;
else if ((ret = get_max(ei, buf)) != _NOTMATCH)
;
else if ((ret = get_flags(ei, buf)) != _NOTMATCH)
;
else
ret = _PARSEFAIL;
if (ret == _PARSEFAIL)
goto parsefail;
v = e;
}
return (0);
parsefail:
free(ei->recommend[0]);
free(ei->recommend[1]);
free(ei->recommend[2]);
free(ei->recommend[3]);
return (EFTYPE);
}
static __inline void
/*ARGSUSED*/
_citrus_ISO2022_init_state(_ISO2022EncodingInfo * __restrict ei,
_ISO2022State * __restrict s)
{
int i;
memset(s, 0, sizeof(*s));
s->gl = 0;
s->gr = (ei->flags & F_8BIT) ? 1 : -1;
for (i = 0; i < 4; i++)
if (ei->initg[i].final) {
s->g[i].type = ei->initg[i].type;
s->g[i].final = ei->initg[i].final;
s->g[i].interm = ei->initg[i].interm;
}
s->singlegl = s->singlegr = -1;
s->flags |= _ISO2022STATE_FLAG_INITIALIZED;
}
static __inline void
/*ARGSUSED*/
_citrus_ISO2022_pack_state(_ISO2022EncodingInfo * __restrict ei __unused,
void * __restrict pspriv, const _ISO2022State * __restrict s)
{
memcpy(pspriv, (const void *)s, sizeof(*s));
}
static __inline void
/*ARGSUSED*/
_citrus_ISO2022_unpack_state(_ISO2022EncodingInfo * __restrict ei __unused,
_ISO2022State * __restrict s, const void * __restrict pspriv)
{
memcpy((void *)s, pspriv, sizeof(*s));
}
static int
/*ARGSUSED*/
_citrus_ISO2022_encoding_module_init(_ISO2022EncodingInfo * __restrict ei,
const void * __restrict var, size_t lenvar)
{
return (_citrus_ISO2022_parse_variable(ei, var, lenvar));
}
static void
/*ARGSUSED*/
_citrus_ISO2022_encoding_module_uninit(_ISO2022EncodingInfo *ei __unused)
{
}
#define ESC '\033'
#define ECMA -1
#define INTERM -2
#define OECMA -3
static const struct seqtable {
int type;
int csoff;
int finaloff;
int intermoff;
int versoff;
int len;
int chars[10];
} seqtable[] = {
/* G0 94MULTI special */
{ CS94MULTI, -1, 2, -1, -1, 3, { ESC, '$', OECMA }, },
/* G0 94MULTI special with version identification */
{ CS94MULTI, -1, 5, -1, 2, 6, { ESC, '&', ECMA, ESC, '$', OECMA }, },
/* G? 94 */
{ CS94, 1, 2, -1, -1, 3, { ESC, CS94, ECMA, }, },
/* G? 94 with 2nd intermediate char */
{ CS94, 1, 3, 2, -1, 4, { ESC, CS94, INTERM, ECMA, }, },
/* G? 96 */
{ CS96, 1, 2, -1, -1, 3, { ESC, CS96, ECMA, }, },
/* G? 96 with 2nd intermediate char */
{ CS96, 1, 3, 2, -1, 4, { ESC, CS96, INTERM, ECMA, }, },
/* G? 94MULTI */
{ CS94MULTI, 2, 3, -1, -1, 4, { ESC, '$', CS94, ECMA, }, },
/* G? 96MULTI */
{ CS96MULTI, 2, 3, -1, -1, 4, { ESC, '$', CS96, ECMA, }, },
/* G? 94MULTI with version specification */
{ CS94MULTI, 5, 6, -1, 2, 7, { ESC, '&', ECMA, ESC, '$', CS94, ECMA, }, },
/* LS2/3 */
{ -1, -1, -1, -1, -1, 2, { ESC, 'n', }, },
{ -1, -1, -1, -1, -1, 2, { ESC, 'o', }, },
/* LS1/2/3R */
{ -1, -1, -1, -1, -1, 2, { ESC, '~', }, },
{ -1, -1, -1, -1, -1, 2, { ESC, /*{*/ '}', }, },
{ -1, -1, -1, -1, -1, 2, { ESC, '|', }, },
/* SS2/3 */
{ -1, -1, -1, -1, -1, 2, { ESC, 'N', }, },
{ -1, -1, -1, -1, -1, 2, { ESC, 'O', }, },
/* end of records */
// { 0, }
{ 0, 0, 0, 0, 0, 0, { ESC, 0, }, }
};
static int
seqmatch(const char * __restrict s, size_t n,
const struct seqtable * __restrict sp)
{
const int *p;
p = sp->chars;
while ((size_t)(p - sp->chars) < n && p - sp->chars < sp->len) {
switch (*p) {
case ECMA:
if (!isecma(*s))
goto terminate;
break;
case OECMA:
if (*s && strchr("@AB", *s))
break;
else
goto terminate;
case INTERM:
if (!isinterm(*s))
goto terminate;
break;
case CS94:
if (*s && strchr("()*+", *s))
break;
else
goto terminate;
case CS96:
if (*s && strchr(",-./", *s))
break;
else
goto terminate;
default:
if (*s != *p)
goto terminate;
break;
}
p++;
s++;
}
terminate:
return (p - sp->chars);
}
static wchar_t
_ISO2022_sgetwchar(_ISO2022EncodingInfo * __restrict ei __unused,
char * __restrict string, size_t n, char ** __restrict result,
_ISO2022State * __restrict psenc)
{
const struct seqtable *sp;
wchar_t wchar = 0;
int i, cur, nmatch;
while (1) {
/* SI/SO */
if (1 <= n && string[0] == '\017') {
psenc->gl = 0;
string++;
n--;
continue;
}
if (1 <= n && string[0] == '\016') {
psenc->gl = 1;
string++;
n--;
continue;
}
/* SS2/3R */
if (1 <= n && string[0] && strchr("\217\216", string[0])) {
psenc->singlegl = psenc->singlegr =
(string[0] - '\216') + 2;
string++;
n--;
continue;
}
/* eat the letter if this is not ESC */
if (1 <= n && string[0] != '\033')
break;
/* look for a perfect match from escape sequences */
for (sp = &seqtable[0]; sp->len; sp++) {
nmatch = seqmatch(string, n, sp);
if (sp->len == nmatch && n >= (size_t)(sp->len))
break;
}
if (!sp->len)
goto notseq;
if (sp->type != -1) {
if (sp->csoff == -1)
i = 0;
else {
switch (sp->type) {
case CS94:
case CS94MULTI:
i = string[sp->csoff] - '(';
break;
case CS96:
case CS96MULTI:
i = string[sp->csoff] - ',';
break;
default:
return (_ISO2022INVALID);
}
}
psenc->g[i].type = sp->type;
psenc->g[i].final = '\0';
psenc->g[i].interm = '\0';
psenc->g[i].vers = '\0';
/* sp->finaloff must not be -1 */
if (sp->finaloff != -1)
psenc->g[i].final = string[sp->finaloff];
if (sp->intermoff != -1)
psenc->g[i].interm = string[sp->intermoff];
if (sp->versoff != -1)
psenc->g[i].vers = string[sp->versoff];
string += sp->len;
n -= sp->len;
continue;
}
/* LS2/3 */
if (2 <= n && string[0] == '\033' &&
string[1] && strchr("no", string[1])) {
psenc->gl = string[1] - 'n' + 2;
string += 2;
n -= 2;
continue;
}
/* LS1/2/3R */
/* XXX: { for vi showmatch */
if (2 <= n && string[0] == '\033' &&
string[1] && strchr("~}|", string[1])) {
psenc->gr = 3 - (string[1] - '|');
string += 2;
n -= 2;
continue;
}
/* SS2/3 */
if (2 <= n && string[0] == '\033' && string[1] &&
strchr("NO", string[1])) {
psenc->singlegl = (string[1] - 'N') + 2;
string += 2;
n -= 2;
continue;
}
notseq:
/*
* if we've got an unknown escape sequence, eat the ESC at the
* head. otherwise, wait till full escape sequence comes.
*/
for (sp = &seqtable[0]; sp->len; sp++) {
nmatch = seqmatch(string, n, sp);
if (!nmatch)
continue;
/*
* if we are in the middle of escape sequence,
* we still need to wait for more characters to come
*/
if (n < (size_t)(sp->len)) {
if ((size_t)(nmatch) == n) {
if (result)
*result = string;
return (_ISO2022INVALID);
}
} else {
if (nmatch == sp->len) {
/* this case should not happen */
goto eat;
}
}
}
break;
}
eat:
/* no letter to eat */
if (n < 1) {
if (result)
*result = string;
return (_ISO2022INVALID);
}
/* normal chars. always eat C0/C1 as is. */
if (iscntl(*string & 0xff))
cur = -1;
else if (*string & 0x80)
cur = (psenc->singlegr == -1) ? psenc->gr : psenc->singlegr;
else
cur = (psenc->singlegl == -1) ? psenc->gl : psenc->singlegl;
if (cur == -1) {
asis:
wchar = *string++ & 0xff;
if (result)
*result = string;
/* reset single shift state */
psenc->singlegr = psenc->singlegl = -1;
return (wchar);
}
/* length error check */
switch (psenc->g[cur].type) {
case CS94MULTI:
case CS96MULTI:
if (!isthree(psenc->g[cur].final)) {
if (2 <= n &&
(string[0] & 0x80) == (string[1] & 0x80))
break;
} else {
if (3 <= n &&
(string[0] & 0x80) == (string[1] & 0x80) &&
(string[0] & 0x80) == (string[2] & 0x80))
break;
}
/* we still need to wait for more characters to come */
if (result)
*result = string;
return (_ISO2022INVALID);
case CS94:
case CS96:
if (1 <= n)
break;
/* we still need to wait for more characters to come */
if (result)
*result = string;
return (_ISO2022INVALID);
}
/* range check */
switch (psenc->g[cur].type) {
case CS94:
if (!(is94(string[0] & 0x7f)))
goto asis;
case CS96:
if (!(is96(string[0] & 0x7f)))
goto asis;
break;
case CS94MULTI:
if (!(is94(string[0] & 0x7f) && is94(string[1] & 0x7f)))
goto asis;
break;
case CS96MULTI:
if (!(is96(string[0] & 0x7f) && is96(string[1] & 0x7f)))
goto asis;
break;
}
/* extract the character. */
switch (psenc->g[cur].type) {
case CS94:
/* special case for ASCII. */
if (psenc->g[cur].final == 'B' && !psenc->g[cur].interm) {
wchar = *string++;
wchar &= 0x7f;
break;
}
wchar = psenc->g[cur].final;
wchar = (wchar << 8);
wchar |= (psenc->g[cur].interm ? (0x80 | psenc->g[cur].interm) : 0);
wchar = (wchar << 8);
wchar = (wchar << 8) | (*string++ & 0x7f);
break;
case CS96:
/* special case for ISO-8859-1. */
if (psenc->g[cur].final == 'A' && !psenc->g[cur].interm) {
wchar = *string++;
wchar &= 0x7f;
wchar |= 0x80;
break;
}
wchar = psenc->g[cur].final;
wchar = (wchar << 8);
wchar |= (psenc->g[cur].interm ? (0x80 | psenc->g[cur].interm) : 0);
wchar = (wchar << 8);
wchar = (wchar << 8) | (*string++ & 0x7f);
wchar |= 0x80;
break;
case CS94MULTI:
case CS96MULTI:
wchar = psenc->g[cur].final;
wchar = (wchar << 8);
if (isthree(psenc->g[cur].final))
wchar |= (*string++ & 0x7f);
wchar = (wchar << 8) | (*string++ & 0x7f);
wchar = (wchar << 8) | (*string++ & 0x7f);
if (psenc->g[cur].type == CS96MULTI)
wchar |= 0x80;
break;
}
if (result)
*result = string;
/* reset single shift state */
psenc->singlegr = psenc->singlegl = -1;
return (wchar);
}
static int
_citrus_ISO2022_mbrtowc_priv(_ISO2022EncodingInfo * __restrict ei,
wchar_t * __restrict pwc, char ** __restrict s,
size_t n, _ISO2022State * __restrict psenc, size_t * __restrict nresult)
{
char *p, *result, *s0;
wchar_t wchar;
int c, chlenbak;
if (*s == NULL) {
_citrus_ISO2022_init_state(ei, psenc);
*nresult = _ENCODING_IS_STATE_DEPENDENT;
return (0);
}
s0 = *s;
c = 0;
chlenbak = psenc->chlen;
/*
* if we have something in buffer, use that.
* otherwise, skip here
*/
if (psenc->chlen > sizeof(psenc->ch)) {
/* illgeal state */
_citrus_ISO2022_init_state(ei, psenc);
goto encoding_error;
}
if (psenc->chlen == 0)
goto emptybuf;
/* buffer is not empty */
p = psenc->ch;
while (psenc->chlen < sizeof(psenc->ch)) {
if (n > 0) {
psenc->ch[psenc->chlen++] = *s0++;
n--;
}
wchar = _ISO2022_sgetwchar(ei, p, psenc->chlen - (p-psenc->ch),
&result, psenc);
c += result - p;
if (wchar != _ISO2022INVALID) {
if (psenc->chlen > (size_t)c)
memmove(psenc->ch, result, psenc->chlen - c);
if (psenc->chlen < (size_t)c)
psenc->chlen = 0;
else
psenc->chlen -= c;
goto output;
}
if (n == 0) {
if ((size_t)(result - p) == psenc->chlen)
/* complete shift sequence. */
psenc->chlen = 0;
goto restart;
}
p = result;
}
/* escape sequence too long? */
goto encoding_error;
emptybuf:
wchar = _ISO2022_sgetwchar(ei, s0, n, &result, psenc);
if (wchar != _ISO2022INVALID) {
c += result - s0;
psenc->chlen = 0;
s0 = result;
goto output;
}
if (result > s0) {
c += (result - s0);
n -= (result - s0);
s0 = result;
if (n > 0)
goto emptybuf;
/* complete shift sequence. */
goto restart;
}
n += c;
if (n < sizeof(psenc->ch)) {
memcpy(psenc->ch, s0 - c, n);
psenc->chlen = n;
s0 = result;
goto restart;
}
/* escape sequence too long? */
encoding_error:
psenc->chlen = 0;
*nresult = (size_t)-1;
return (EILSEQ);
output:
*s = s0;
if (pwc)
*pwc = wchar;
*nresult = wchar ? c - chlenbak : 0;
return (0);
restart:
*s = s0;
*nresult = (size_t)-2;
return (0);
}
static int
recommendation(_ISO2022EncodingInfo * __restrict ei,
_ISO2022Charset * __restrict cs)
{
_ISO2022Charset *recommend;
size_t j;
int i;
/* first, try a exact match. */
for (i = 0; i < 4; i++) {
recommend = ei->recommend[i];
for (j = 0; j < ei->recommendsize[i]; j++) {
if (cs->type != recommend[j].type)
continue;
if (cs->final != recommend[j].final)
continue;
if (cs->interm != recommend[j].interm)
continue;
return (i);
}
}
/* then, try a wildcard match over final char. */
for (i = 0; i < 4; i++) {
recommend = ei->recommend[i];
for (j = 0; j < ei->recommendsize[i]; j++) {
if (cs->type != recommend[j].type)
continue;
if (cs->final && (cs->final != recommend[j].final))
continue;
if (cs->interm && (cs->interm != recommend[j].interm))
continue;
return (i);
}
}
/* there's no recommendation. make a guess. */
if (ei->maxcharset == 0) {
return (0);
} else {
switch (cs->type) {
case CS94:
case CS94MULTI:
return (0);
case CS96:
case CS96MULTI:
return (1);
}
}
return (0);
}
static int
_ISO2022_sputwchar(_ISO2022EncodingInfo * __restrict ei, wchar_t wc,
char * __restrict string, size_t n, char ** __restrict result,
_ISO2022State * __restrict psenc, size_t * __restrict nresult)
{
_ISO2022Charset cs;
char *p;
char tmp[MB_LEN_MAX];
size_t len;
int bit8, i = 0, target;
unsigned char mask;
if (isc0(wc & 0xff)) {
/* go back to INIT0 or ASCII on control chars */
cs = ei->initg[0].final ? ei->initg[0] : ascii;
} else if (isc1(wc & 0xff)) {
/* go back to INIT1 or ISO-8859-1 on control chars */
cs = ei->initg[1].final ? ei->initg[1] : iso88591;
} else if (!(wc & ~0xff)) {
if (wc & 0x80) {
/* special treatment for ISO-8859-1 */
cs = iso88591;
} else {
/* special treatment for ASCII */
cs = ascii;
}
} else {
cs.final = (wc >> 24) & 0x7f;
if ((wc >> 16) & 0x80)
cs.interm = (wc >> 16) & 0x7f;
else
cs.interm = '\0';
if (wc & 0x80)
cs.type = (wc & 0x00007f00) ? CS96MULTI : CS96;
else
cs.type = (wc & 0x00007f00) ? CS94MULTI : CS94;
}
target = recommendation(ei, &cs);
p = tmp;
bit8 = ei->flags & F_8BIT;
/* designate the charset onto the target plane(G0/1/2/3). */
if (psenc->g[target].type == cs.type &&
psenc->g[target].final == cs.final &&
psenc->g[target].interm == cs.interm)
goto planeok;
*p++ = '\033';
if (cs.type == CS94MULTI || cs.type == CS96MULTI)
*p++ = '$';
if (target == 0 && cs.type == CS94MULTI && strchr("@AB", cs.final) &&
!cs.interm && !(ei->flags & F_NOOLD))
;
else if (cs.type == CS94 || cs.type == CS94MULTI)
*p++ = "()*+"[target];
else
*p++ = ",-./"[target];
if (cs.interm)
*p++ = cs.interm;
*p++ = cs.final;
psenc->g[target].type = cs.type;
psenc->g[target].final = cs.final;
psenc->g[target].interm = cs.interm;
planeok:
/* invoke the plane onto GL or GR. */
if (psenc->gl == target)
goto sideok;
if (bit8 && psenc->gr == target)
goto sideok;
if (target == 0 && (ei->flags & F_LS0)) {
*p++ = '\017';
psenc->gl = 0;
} else if (target == 1 && (ei->flags & F_LS1)) {
*p++ = '\016';
psenc->gl = 1;
} else if (target == 2 && (ei->flags & F_LS2)) {
*p++ = '\033';
*p++ = 'n';
psenc->gl = 2;
} else if (target == 3 && (ei->flags & F_LS3)) {
*p++ = '\033';
*p++ = 'o';
psenc->gl = 3;
} else if (bit8 && target == 1 && (ei->flags & F_LS1R)) {
*p++ = '\033';
*p++ = '~';
psenc->gr = 1;
} else if (bit8 && target == 2 && (ei->flags & F_LS2R)) {
*p++ = '\033';
/*{*/
*p++ = '}';
psenc->gr = 2;
} else if (bit8 && target == 3 && (ei->flags & F_LS3R)) {
*p++ = '\033';
*p++ = '|';
psenc->gr = 3;
} else if (target == 2 && (ei->flags & F_SS2)) {
*p++ = '\033';
*p++ = 'N';
psenc->singlegl = 2;
} else if (target == 3 && (ei->flags & F_SS3)) {
*p++ = '\033';
*p++ = 'O';
psenc->singlegl = 3;
} else if (bit8 && target == 2 && (ei->flags & F_SS2R)) {
*p++ = '\216';
*p++ = 'N';
psenc->singlegl = psenc->singlegr = 2;
} else if (bit8 && target == 3 && (ei->flags & F_SS3R)) {
*p++ = '\217';
*p++ = 'O';
psenc->singlegl = psenc->singlegr = 3;
} else
goto ilseq;
sideok:
if (psenc->singlegl == target)
mask = 0x00;
else if (psenc->singlegr == target)
mask = 0x80;
else if (psenc->gl == target)
mask = 0x00;
else if ((ei->flags & F_8BIT) && psenc->gr == target)
mask = 0x80;
else
goto ilseq;
switch (cs.type) {
case CS94:
case CS96:
i = 1;
break;
case CS94MULTI:
case CS96MULTI:
i = !iscntl(wc & 0xff) ?
(isthree(cs.final) ? 3 : 2) : 1;
break;
}
while (i-- > 0)
*p++ = ((wc >> (i << 3)) & 0x7f) | mask;
/* reset single shift state */
psenc->singlegl = psenc->singlegr = -1;
len = (size_t)(p - tmp);
if (n < len) {
if (result)
*result = (char *)0;
*nresult = (size_t)-1;
return (E2BIG);
}
if (result)
*result = string + len;
memcpy(string, tmp, len);
*nresult = len;
return (0);
ilseq:
*nresult = (size_t)-1;
return (EILSEQ);
}
static int
_citrus_ISO2022_put_state_reset(_ISO2022EncodingInfo * __restrict ei,
char * __restrict s, size_t n, _ISO2022State * __restrict psenc,
size_t * __restrict nresult)
{
char *result;
char buf[MB_LEN_MAX];
size_t len;
int ret;
/* XXX state will be modified after this operation... */
ret = _ISO2022_sputwchar(ei, L'\0', buf, sizeof(buf), &result, psenc,
&len);
if (ret) {
*nresult = len;
return (ret);
}
if (sizeof(buf) < len || n < len-1) {
/* XXX should recover state? */
*nresult = (size_t)-1;
return (E2BIG);
}
memcpy(s, buf, len - 1);
*nresult = len - 1;
return (0);
}
static int
_citrus_ISO2022_wcrtomb_priv(_ISO2022EncodingInfo * __restrict ei,
char * __restrict s, size_t n, wchar_t wc,
_ISO2022State * __restrict psenc, size_t * __restrict nresult)
{
char *result;
char buf[MB_LEN_MAX];
size_t len;
int ret;
/* XXX state will be modified after this operation... */
ret = _ISO2022_sputwchar(ei, wc, buf, sizeof(buf), &result, psenc,
&len);
if (ret) {
*nresult = len;
return (ret);
}
if (sizeof(buf) < len || n < len) {
/* XXX should recover state? */
*nresult = (size_t)-1;
return (E2BIG);
}
memcpy(s, buf, len);
*nresult = len;
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_ISO2022_stdenc_wctocs(_ISO2022EncodingInfo * __restrict ei __unused,
_csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
{
wchar_t m, nm;
m = wc & 0x7FFF8080;
nm = wc & 0x007F7F7F;
if (m & 0x00800000)
nm &= 0x00007F7F;
else
m &= 0x7F008080;
if (nm & 0x007F0000) {
/* ^3 mark */
m |= 0x007F0000;
} else if (nm & 0x00007F00) {
/* ^2 mark */
m |= 0x00007F00;
}
*csid = (_csid_t)m;
*idx = (_index_t)nm;
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_ISO2022_stdenc_cstowc(_ISO2022EncodingInfo * __restrict ei __unused,
wchar_t * __restrict wc, _csid_t csid, _index_t idx)
{
*wc = (wchar_t)(csid & 0x7F808080) | (wchar_t)idx;
return (0);
}
static __inline int
/*ARGSUSED*/
_citrus_ISO2022_stdenc_get_state_desc_generic(_ISO2022EncodingInfo * __restrict ei __unused,
_ISO2022State * __restrict psenc, int * __restrict rstate)
{
if (psenc->chlen == 0) {
/* XXX: it should distinguish initial and stable. */
*rstate = _STDENC_SDGEN_STABLE;
} else
*rstate = (psenc->ch[0] == '\033') ?
_STDENC_SDGEN_INCOMPLETE_SHIFT :
_STDENC_SDGEN_INCOMPLETE_CHAR;
return (0);
}
/* ----------------------------------------------------------------------
* public interface for stdenc
*/
_CITRUS_STDENC_DECLS(ISO2022);
_CITRUS_STDENC_DEF_OPS(ISO2022);
#include "citrus_stdenc_template.h"