Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 367 insertions, 0 deletions

diff --git a/src/plugins/codecs/jp/qjiscodec.cpp b/src/plugins/codecs/jp/qjiscodec.cpp
new file mode 100644
index 0000000000..b4c6d5fbc5
--- /dev/null
+++ b/src/plugins/codecs/jp/qjiscodec.cpp
@@ -0,0 +1,367 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Most of the code here was originally written by Serika Kurusugawa,
+// a.k.a. Junji Takagi, and is included in Qt with the author's permission
+// and the grateful thanks of the Qt team.
+
+/*! \class QJisCodec
+    \reentrant
+    \internal
+*/
+
+#include "qjiscodec.h"
+#include "qlist.h"
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_TEXTCODEC
+enum {
+    Esc = 0x1b,
+    So = 0x0e,         // Shift Out
+    Si = 0x0f,         // Shift In
+
+    ReverseSolidus = 0x5c,
+    YenSign = 0x5c,
+    Tilde = 0x7e,
+    Overline = 0x7e
+};
+
+#define        IsKana(c)        (((c) >= 0xa1) && ((c) <= 0xdf))
+#define        IsJisChar(c)        (((c) >= 0x21) && ((c) <= 0x7e))
+
+#define        QValidChar(u)        ((u) ? QChar((ushort)(u)) : QChar(QChar::ReplacementCharacter))
+
+enum Iso2022State{ Ascii, MinState = Ascii,
+                   JISX0201_Latin, JISX0201_Kana,
+                   JISX0208_1978, JISX0208_1983,
+                   JISX0212, MaxState = JISX0212,
+                   UnknownState };
+
+static const char Esc_CHARS[] = "()*+-./";
+
+static const char Esc_Ascii[]                 = {Esc, '(', 'B', 0 };
+static const char Esc_JISX0201_Latin[]        = {Esc, '(', 'J', 0 };
+static const char Esc_JISX0201_Kana[]        = {Esc, '(', 'I', 0 };
+static const char Esc_JISX0208_1978[]        = {Esc, '$', '@', 0 };
+static const char Esc_JISX0208_1983[]        = {Esc, '$', 'B', 0 };
+static const char Esc_JISX0212[]        = {Esc, '$', '(', 'D', 0 };
+static const char * const Esc_SEQ[] = { Esc_Ascii,
+                                        Esc_JISX0201_Latin,
+                                        Esc_JISX0201_Kana,
+                                        Esc_JISX0208_1978,
+                                        Esc_JISX0208_1983,
+                                        Esc_JISX0212 };
+
+/*! \internal */
+QJisCodec::QJisCodec() : conv(QJpUnicodeConv::newConverter(QJpUnicodeConv::Default))
+{
+}
+
+
+/*! \internal */
+QJisCodec::~QJisCodec()
+{
+    delete (QJpUnicodeConv*)conv;
+    conv = 0;
+}
+
+QByteArray QJisCodec::convertFromUnicode(const QChar *uc, int len, ConverterState *cs) const
+{
+    char replacement = '?';
+    if (cs) {
+        if (cs->flags & ConvertInvalidToNull)
+            replacement = 0;
+    }
+    int invalid = 0;
+
+    QByteArray result;
+    Iso2022State state = Ascii;
+    Iso2022State prev = Ascii;
+    for (int i = 0; i < len; i++) {
+        QChar ch = uc[i];
+        uint j;
+        if (ch.row() == 0x00 && ch.cell() < 0x80) {
+            // Ascii
+            if (state != JISX0201_Latin ||
+                ch.cell() == ReverseSolidus || ch.cell() == Tilde) {
+                state = Ascii;
+            }
+            j = ch.cell();
+        } else if ((j = conv->unicodeToJisx0201(ch.row(), ch.cell())) != 0) {
+            if (j < 0x80) {
+                // JIS X 0201 Latin
+                if (state != Ascii ||
+                    ch.cell() == YenSign || ch.cell() == Overline) {
+                    state = JISX0201_Latin;
+                }
+            } else {
+                // JIS X 0201 Kana
+                state = JISX0201_Kana;
+                j &= 0x7f;
+            }
+        } else if ((j = conv->unicodeToJisx0208(ch.row(), ch.cell())) != 0) {
+            // JIS X 0208
+            state = JISX0208_1983;
+        } else if ((j = conv->unicodeToJisx0212(ch.row(), ch.cell())) != 0) {
+            // JIS X 0212
+            state = JISX0212;
+        } else {
+            // Invalid
+            state = UnknownState;
+            j = replacement;
+            ++invalid;
+        }
+        if (state != prev) {
+            if (state == UnknownState) {
+                result += Esc_Ascii;
+            } else {
+                result += Esc_SEQ[state - MinState];
+            }
+            prev = state;
+        }
+        if (j < 0x0100) {
+            result += j & 0xff;
+        } else {
+            result += (j >> 8) & 0xff;
+            result += j & 0xff;
+        }
+    }
+    if (prev != Ascii) {
+        result += Esc_Ascii;
+    }
+
+    if (cs) {
+        cs->invalidChars += invalid;
+    }
+    return result;
+}
+
+QString QJisCodec::convertToUnicode(const char* chars, int len, ConverterState *cs) const
+{
+    uchar buf[4] = {0, 0, 0, 0};
+    int nbuf = 0;
+    Iso2022State state = Ascii, prev = Ascii;
+    bool esc = false;
+    QChar replacement = QChar::ReplacementCharacter;
+    if (cs) {
+        if (cs->flags & ConvertInvalidToNull)
+            replacement = QChar::Null;
+        nbuf = cs->remainingChars;
+        buf[0] = (cs->state_data[0] >> 24) & 0xff;
+        buf[1] = (cs->state_data[0] >> 16) & 0xff;
+        buf[2] = (cs->state_data[0] >>  8) & 0xff;
+        buf[3] = (cs->state_data[0] >>  0) & 0xff;
+        state = (Iso2022State)((cs->state_data[1] >>  0) & 0xff);
+        prev = (Iso2022State)((cs->state_data[1] >>  8) & 0xff);
+        esc = cs->state_data[2];
+    }
+    int invalid = 0;
+
+    QString result;
+    for (int i=0; i<len; i++) {
+        uchar ch = chars[i];
+        if (esc) {
+            // Escape sequence
+            state = UnknownState;
+            switch (nbuf) {
+            case 0:
+                if (ch == '$' || strchr(Esc_CHARS, ch)) {
+                    buf[nbuf++] = ch;
+                } else {
+                    nbuf = 0;
+                    esc = false;
+                }
+                break;
+            case 1:
+                if (buf[0] == '$') {
+                    if (strchr(Esc_CHARS, ch)) {
+                        buf[nbuf++] = ch;
+                    } else {
+                        switch (ch) {
+                        case '@':
+                            state = JISX0208_1978;        // Esc $ @
+                            break;
+                        case 'B':
+                            state = JISX0208_1983;        // Esc $ B
+                            break;
+                        }
+                        nbuf = 0;
+                        esc = false;
+                    }
+                } else {
+                    if (buf[0] == '(') {
+                        switch (ch) {
+                        case 'B':
+                            state = Ascii;        // Esc (B
+                            break;
+                        case 'I':
+                            state = JISX0201_Kana;        // Esc (I
+                            break;
+                        case 'J':
+                            state = JISX0201_Latin;        // Esc (J
+                            break;
+                        }
+                    }
+                    nbuf = 0;
+                    esc = false;
+                }
+                break;
+            case 2:
+                if (buf[1] == '(') {
+                    switch (ch) {
+                    case 'D':
+                        state = JISX0212;        // Esc $ (D
+                        break;
+                    }
+                }
+                nbuf = 0;
+                esc = false;
+                break;
+            }
+        } else {
+            if (ch == Esc) {
+                // Escape sequence
+                nbuf = 0;
+                esc = true;
+            } else if (ch == So) {
+                // Shift out
+                prev = state;
+                state = JISX0201_Kana;
+                nbuf = 0;
+            } else if (ch == Si) {
+                // Shift in
+                if (prev == Ascii || prev == JISX0201_Latin) {
+                    state = prev;
+                } else {
+                    state = Ascii;
+                }
+                nbuf = 0;
+            } else {
+                uint u;
+                switch (nbuf) {
+                case 0:
+                    switch (state) {
+                    case Ascii:
+                        if (ch < 0x80) {
+                            result += QLatin1Char(ch);
+                            break;
+                        }
+                        /* fall through */
+                    case JISX0201_Latin:
+                        u = conv->jisx0201ToUnicode(ch);
+                        result += QValidChar(u);
+                        break;
+                    case JISX0201_Kana:
+                        u = conv->jisx0201ToUnicode(ch | 0x80);
+                        result += QValidChar(u);
+                        break;
+                    case JISX0208_1978:
+                    case JISX0208_1983:
+                    case JISX0212:
+                        buf[nbuf++] = ch;
+                        break;
+                    default:
+                        result += QChar::ReplacementCharacter;
+                        break;
+                    }
+                    break;
+                case 1:
+                    switch (state) {
+                    case JISX0208_1978:
+                    case JISX0208_1983:
+                        u = conv->jisx0208ToUnicode(buf[0] & 0x7f, ch & 0x7f);
+                        result += QValidChar(u);
+                        break;
+                    case JISX0212:
+                        u = conv->jisx0212ToUnicode(buf[0] & 0x7f, ch & 0x7f);
+                        result += QValidChar(u);
+                        break;
+                    default:
+                        result += replacement;
+                        ++invalid;
+                        break;
+                    }
+                    nbuf = 0;
+                    break;
+                }
+            }
+        }
+    }
+
+    if (cs) {
+        cs->remainingChars = nbuf;
+        cs->invalidChars += invalid;
+        cs->state_data[0] = (buf[0] << 24) + (buf[1] << 16) + (buf[2] << 8) + buf[3];
+        cs->state_data[1] = (prev << 8) + state;
+        cs->state_data[2] = esc;
+    }
+
+    return result;
+}
+
+
+
+/*! \internal */
+int QJisCodec::_mibEnum()
+{
+    return 39;
+}
+
+/*! \internal */
+QByteArray QJisCodec::_name()
+{
+    return "ISO-2022-JP";
+}
+
+/*!
+    Returns the codec's mime name.
+*/
+QList<QByteArray> QJisCodec::_aliases()
+{
+    QList<QByteArray> list;
+    list << "JIS7"; // Qt 3 compat
+    return list;
+}
+
+#endif // QT_NO_TEXTCODEC
+
+QT_END_NAMESPACE