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tqt3/src/codecs/qsjiscodec.cpp

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/****************************************************************************
**
** Implementation of TQSjisCodec class
**
** Created : 990225
**
** Copyright (C) 2000-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the tools module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
** included in the packaging of this file. Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
// Most of the code here was originally written by Serika Kurusugawa
// a.k.a. Junji Takagi, and is included in TQt with the author's permission,
// and the grateful thanks of the Trolltech team.
/*! \class TQSjisCodec qsjiscodec.h
\reentrant
\ingroup i18n
\brief The TQSjisCodec class provides conversion to and from Shift-JIS.
More precisely, the TQSjisCodec class subclasses TQTextCodec to
provide support for Shift-JIS, an encoding of JIS X 0201 Latin, JIS
X 0201 Kana or JIS X 0208.
The environment variable \c UNICODEMAP_JP can be used to fine-tune
TQJisCodec, TQSjisCodec and TQEucJpCodec. The \l TQJisCodec
documentation describes how to use this variable.
Most of the code here was written by Serika Kurusugawa,
a.k.a. Junji Takagi, and is included in TQt with the author's
permission and the grateful thanks of the Trolltech team.
Here is the copyright statement for the code as it was at the
point of contribution. Trolltech's subsequent modifications
are covered by the usual copyright for TQt.
\legalese
Copyright (C) 1999 Serika Kurusugawa. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
\list 1
\i Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
\i 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.
\endlist
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS".
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 REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSETQUENTIAL
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 "qsjiscodec.h"
#ifndef QT_NO_BIG_CODECS
static const uchar Esc = 0x1b;
#define IsKana(c) (((c) >= 0xa1) && ((c) <= 0xdf))
#define IsSjisChar1(c) ((((c) >= 0x81) && ((c) <= 0x9f)) || \
(((c) >= 0xe0) && ((c) <= 0xfc)))
#define IsSjisChar2(c) (((c) >= 0x40) && ((c) != 0x7f) && ((c) <= 0xfc))
#define IsUserDefinedChar1(c) (((c) >= 0xf0) && ((c) <= 0xfc))
#define TQValidChar(u) ((u) ? TQChar((ushort)(u)) : TQChar::replacement)
/*!
Creates a Shift-JIS codec. Note that this is done automatically by
the TQApplication, you do not need construct your own.
*/
TQSjisCodec::TQSjisCodec() : conv(TQJpUnicodeConv::newConverter(TQJpUnicodeConv::Default))
{
}
/*!
Destroys the Shift-JIS codec.
*/
TQSjisCodec::~TQSjisCodec()
{
delete (TQJpUnicodeConv*)conv;
conv = 0;
}
/*!
\reimp
*/
int TQSjisCodec::mibEnum() const
{
/*
Name: Shift_JIS (preferred MIME name)
MIBenum: 17
Source: A Microsoft code that extends csHalfWidthKatakana to include
kanji by adding a second byte when the value of the first
byte is in the ranges 81-9F or E0-EF.
Alias: MS_Kanji
Alias: csShiftJIS
*/
return 17;
}
/*!
\reimp
*/
TQCString TQSjisCodec::fromUnicode(const TQString& uc, int& lenInOut) const
{
int l = TQMIN((int)uc.length(),lenInOut);
int rlen = l*2+1;
TQCString rstr(rlen);
uchar* cursor = (uchar*)rstr.data();
for (int i=0; i<l; i++) {
TQChar ch = uc[i];
uint j;
if ( ch.row() == 0x00 && ch.cell() < 0x80 ) {
// ASCII
*cursor++ = ch.cell();
} else if ((j = conv->unicodeToJisx0201(ch.row(), ch.cell())) != 0) {
// JIS X 0201 Latin or JIS X 0201 Kana
*cursor++ = j;
} else if ((j = conv->unicodeToSjis(ch.row(), ch.cell())) != 0) {
// JIS X 0208
*cursor++ = (j >> 8);
*cursor++ = (j & 0xff);
} else if ((j = conv->unicodeToSjisibmvdc(ch.row(), ch.cell())) != 0) {
// JIS X 0208 IBM VDC
*cursor++ = (j >> 8);
*cursor++ = (j & 0xff);
} else if ((j = conv->unicodeToCp932(ch.row(), ch.cell())) != 0) {
// CP932 (for lead bytes 87, ee & ed)
*cursor++ = (j >> 8);
*cursor++ = (j & 0xff);
} else if ((j = conv->unicodeToJisx0212(ch.row(), ch.cell())) != 0) {
// JIS X 0212 (can't be encoded in ShiftJIS !)
*cursor++ = 0x81; // white square
*cursor++ = 0xa0; // white square
} else {
// Error
*cursor++ = '?'; // unknown char
}
}
lenInOut = cursor - (uchar*)rstr.data();
rstr.truncate(lenInOut);
return rstr;
}
/*!
\reimp
*/
TQString TQSjisCodec::toUnicode(const char* chars, int len) const
{
uint u;
TQString result;
for (int i=0; i<len; i++) {
uchar ch = chars[i];
if ( ch < 0x80 || IsKana(ch) ) {
// JIS X 0201 Latin or JIS X 0201 Kana
u = conv->jisx0201ToUnicode(ch);
result += TQValidChar(u);
} else if ( IsSjisChar1(ch) ) {
// JIS X 0208
if ( i < len-1 ) {
uchar c2 = chars[++i];
if ( IsSjisChar2(c2) ) {
if ((u = conv->sjisibmvdcToUnicode(ch, c2))) {
result += TQValidChar(u);
} else if ((u = conv->cp932ToUnicode(ch, c2))) {
result += TQValidChar(u);
} else if ( IsUserDefinedChar1(ch) ) {
result += TQChar::replacement;
} else {
u = conv->sjisToUnicode(ch, c2);
result += TQValidChar(u);
}
} else {
i--;
result += TQChar::replacement;
}
} else {
result += TQChar::replacement;
}
} else {
result += TQChar::replacement;
}
}
return result;
}
/*!
\reimp
*/
const char* TQSjisCodec::name() const
{
return "SJIS";
}
/*!
Returns the codec's mime name.
*/
const char* TQSjisCodec::mimeName() const
{
return "Shift_JIS";
}
/*!
\reimp
*/
int TQSjisCodec::heuristicNameMatch(const char* hint) const
{
int score = 0;
bool ja = FALSE;
if (qstrnicmp(hint, "ja_JP", 5) == 0 || qstrnicmp(hint, "japan", 5) == 0) {
score += 3;
ja = TRUE;
} else if (qstrnicmp(hint, "ja", 2) == 0) {
score += 2;
ja = TRUE;
}
const char *p;
if (ja) {
p = strchr(hint, '.');
if (p == 0) {
return score - 1;
}
p++;
} else {
p = hint;
}
if (p) {
if ((qstricmp(p, "mscode") == 0) ||
(qstricmp(p, "PCK") == 0) ||
(qstricmp(p, "SJIS") == 0) ||
(simpleHeuristicNameMatch(p, "ShiftJIS") > 0) ||
(simpleHeuristicNameMatch(p, "x-sjis") > 0)) {
return score + 4;
}
}
return TQTextCodec::heuristicNameMatch(hint);
}
/*!
\reimp
*/
int TQSjisCodec::heuristicContentMatch(const char* chars, int len) const
{
int score = 0;
for (int i=0; i<len; i++) {
uchar ch = chars[i];
// No nulls allowed.
if ( !ch || ch == Esc )
return -1;
if ( ch < 32 && ch != '\t' && ch != '\n' && ch != '\r' ) {
// Suspicious
if ( score )
score--;
} else if ( ch < 0x80 ) {
// Inconclusive
score++;
} else if ( IsKana(ch) ) {
// JIS X 0201 Kana
score++;
} else if ( IsSjisChar1(ch) ) {
// JIS X 0208-1990
if ( i < len-1 ) {
uchar c2 = chars[++i];
if ( !IsSjisChar2(c2) )
return -1;
score++;
}
score++;
} else {
// Invalid
return -1;
}
}
return score;
}
class TQSjisDecoder : public TQTextDecoder {
uchar buf[1];
int nbuf;
const TQJpUnicodeConv * const conv;
public:
TQSjisDecoder(const TQJpUnicodeConv *c) : nbuf(0), conv(c)
{
}
TQString toUnicode(const char* chars, int len)
{
TQString result;
uint u= 0;
for (int i=0; i<len; i++) {
uchar ch = chars[i];
switch (nbuf) {
case 0:
if ( ch < 0x80 || IsKana(ch) ) {
// JIS X 0201 Latin or JIS X 0201 Kana
u = conv->jisx0201ToUnicode(ch);
result += TQValidChar(u);
} else if ( IsSjisChar1(ch) ) {
// JIS X 0208
buf[0] = ch;
nbuf = 1;
} else {
// Invalid
result += TQChar::replacement;
}
break;
case 1:
// JIS X 0208
if ( IsSjisChar2(ch) ) {
if ((u = conv->sjisibmvdcToUnicode(buf[0], ch))) {
result += TQValidChar(u);
} else if ((u = conv->cp932ToUnicode(buf[0], ch))) {
result += TQValidChar(u);
} else if ( IsUserDefinedChar1(buf[0]) ) {
result += TQChar::replacement;
} else {
u = conv->sjisToUnicode(buf[0], ch);
result += TQValidChar(u);
}
} else {
// Invalid
result += TQChar::replacement;
}
nbuf = 0;
break;
}
}
return result;
}
};
/*!
\reimp
*/
TQTextDecoder* TQSjisCodec::makeDecoder() const
{
return new TQSjisDecoder(conv);
}
#endif