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

1 files changed, 285 insertions, 0 deletions

diff --git a/src/corelib/codecs/qisciicodec.cpp b/src/corelib/codecs/qisciicodec.cpp
new file mode 100644
index 0000000000..f7b450b4e4
--- /dev/null
+++ b/src/corelib/codecs/qisciicodec.cpp
@@ -0,0 +1,285 @@
+/****************************************************************************
+**
+** 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 QtCore module 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qisciicodec_p.h"
+#include "qlist.h"
+
+#ifndef QT_NO_CODECS
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QIsciiCodec
+    \brief The QIsciiCodec class provides conversion to and from the ISCII encoding.
+
+    \internal
+*/
+
+
+struct Codecs {
+    const char name[10];
+    ushort base;
+};
+
+static const Codecs codecs [] = {
+    { "Iscii-Dev", 0x900 },
+    { "Iscii-Bng", 0x980 },
+    { "Iscii-Pnj", 0xa00 },
+    { "Iscii-Gjr", 0xa80 },
+    { "Iscii-Ori", 0xb00 },
+    { "Iscii-Tml", 0xb80 },
+    { "Iscii-Tlg", 0xc00 },
+    { "Iscii-Knd", 0xc80 },
+    { "Iscii-Mlm", 0xd00 }
+};
+
+QIsciiCodec::~QIsciiCodec()
+{
+}
+
+QByteArray QIsciiCodec::name() const
+{
+  return codecs[idx].name;
+}
+
+int QIsciiCodec::mibEnum() const
+{
+    /* There is no MIBEnum for Iscii */
+    return -3000-idx;
+}
+
+static const uchar inv = 0xFF;
+
+/* iscii range from 0xa0 - 0xff */
+static const uchar iscii_to_uni_table[0x60] = {
+    0x00, 0x01, 0x02, 0x03,
+    0x05, 0x06, 0x07, 0x08,
+    0x09, 0x0a, 0x0b, 0x0e,
+    0x0f, 0x20, 0x0d, 0x12,
+
+    0x13, 0x14, 0x11, 0x15,
+    0x16, 0x17, 0x18, 0x19,
+    0x1a, 0x1b, 0x1c, 0x1d,
+    0x1e, 0x1f, 0x20, 0x21,
+
+    0x22, 0x23, 0x24, 0x25,
+    0x26, 0x27, 0x28, 0x29,
+    0x2a, 0x2b, 0x2c, 0x2d,
+    0x2e, 0x2f, 0x5f, 0x30,
+
+    0x31, 0x32, 0x33, 0x34,
+    0x35, 0x36, 0x37, 0x38,
+    0x39,  inv, 0x3e, 0x3f,
+    0x40, 0x41, 0x42, 0x43,
+
+    0x46, 0x47, 0x48, 0x45,
+    0x4a, 0x4b, 0x4c, 0x49,
+    0x4d, 0x3c, 0x64, 0x00,
+    0x00, 0x00, 0x00, 0x00,
+
+    0x00, 0x66, 0x67, 0x68,
+    0x69, 0x6a, 0x6b, 0x6c,
+    0x6d, 0x6e, 0x6f, 0x00,
+    0x00, 0x00, 0x00, 0x00
+};
+
+static const uchar uni_to_iscii_table[0x80] = {
+    0x00, 0xa1, 0xa2, 0xa3,
+    0x00, 0xa4, 0xa5, 0xa6,
+    0xa7, 0xa8, 0xa9, 0xaa,
+    0x00, 0xae, 0xab, 0xac,
+
+    0xad, 0xb2, 0xaf, 0xb0,
+    0xb1, 0xb3, 0xb4, 0xb5,
+    0xb6, 0xb7, 0xb8, 0xb9,
+    0xba, 0xbb, 0xbc, 0xbd,
+
+    0xbe, 0xbf, 0xc0, 0xc1,
+    0xc2, 0xc3, 0xc4, 0xc5,
+    0xc6, 0xc7, 0xc8, 0xc9,
+    0xca, 0xcb, 0xcc, 0xcd,
+
+    0xcf, 0xd0, 0xd1, 0xd2,
+    0xd3, 0xd4, 0xd5, 0xd6,
+    0xd7, 0xd8, 0x00, 0x00,
+    0xe9, 0x00, 0xda, 0xdb,
+
+    0xdc, 0xdd, 0xde, 0xdf,
+    0x00, 0xe3, 0xe0, 0xe1,
+    0xe2, 0xe7, 0xe4, 0xe5,
+    0xe6, 0xe8, 0x00, 0x00,
+
+    0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00,
+    0x01, 0x02, 0x03, 0x04, // decomposable into the uc codes listed here + nukta
+    0x05, 0x06, 0x07, 0xce,
+
+    0x00, 0x00, 0x00, 0x00,
+    0xea, 0x08, 0xf1, 0xf2,
+    0xf3, 0xf4, 0xf5, 0xf6,
+    0xf7, 0xf8, 0xf9, 0xfa,
+
+    0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00
+};
+
+static const uchar uni_to_iscii_pairs[] = {
+    0x00, 0x00,
+    0x15, 0x3c, // 0x958
+    0x16, 0x3c, // 0x959
+    0x17, 0x3c, // 0x95a
+    0x1c, 0x3c, // 0x95b
+    0x21, 0x3c, // 0x95c
+    0x22, 0x3c, // 0x95d
+    0x2b, 0x3c, // 0x95e
+    0x64, 0x64  // 0x965
+};
+
+
+QByteArray QIsciiCodec::convertFromUnicode(const QChar *uc, int len, ConverterState *state) const
+{
+    char replacement = '?';
+    bool halant = false;
+    if (state) {
+        if (state->flags & ConvertInvalidToNull)
+            replacement = 0;
+        halant = state->state_data[0];
+    }
+    int invalid = 0;
+
+    QByteArray result(2 * len, Qt::Uninitialized); //worst case
+
+    uchar *ch = reinterpret_cast<uchar *>(result.data());
+
+    const int base = codecs[idx].base;
+
+    for (int i =0; i < len; ++i) {
+        const ushort codePoint = uc[i].unicode();
+
+        /* The low 7 bits of ISCII is plain ASCII. However, we go all the
+         * way up to 0xA0 such that we can roundtrip with convertToUnicode()'s
+         * behavior. */
+        if(codePoint < 0xA0) {
+            *ch++ = static_cast<uchar>(codePoint);
+            continue;
+        }
+
+        const int pos = codePoint - base;
+        if (pos > 0 && pos < 0x80) {
+            uchar iscii = uni_to_iscii_table[pos];
+            if (iscii > 0x80) {
+                *ch++ = iscii;
+            } else if (iscii) {
+                const uchar *pair = uni_to_iscii_pairs + 2*iscii;
+                *ch++ = *pair++;
+                *ch++ = *pair++;
+            } else {
+                *ch++ = replacement;
+                ++invalid;
+            }
+        } else {
+            if (uc[i].unicode() == 0x200c) { // ZWNJ
+                if (halant)
+                    // Consonant Halant ZWNJ -> Consonant Halant Halant
+                    *ch++ = 0xe8;
+            } else if (uc[i].unicode() == 0x200d) { // ZWJ
+                if (halant)
+                    // Consonant Halant ZWJ -> Consonant Halant Nukta
+                    *ch++ = 0xe9;
+            } else {
+                *ch++ = replacement;
+                ++invalid;
+            }
+        }
+        halant = (pos == 0x4d);
+    }
+    result.truncate(ch - (uchar *)result.data());
+
+    if (state) {
+        state->invalidChars += invalid;
+        state->state_data[0] = halant;
+    }
+    return result;
+}
+
+QString QIsciiCodec::convertToUnicode(const char* chars, int len, ConverterState *state) const
+{
+    bool halant = false;
+    if (state) {
+        halant = state->state_data[0];
+    }
+
+    QString result(len, Qt::Uninitialized);
+    QChar *uc = result.data();
+
+    const int base = codecs[idx].base;
+
+    for (int i = 0; i < len; ++i) {
+        ushort ch = (uchar) chars[i];
+        if (ch < 0xa0)
+            *uc++ = ch;
+        else {
+            ushort c = iscii_to_uni_table[ch - 0xa0];
+            if (halant && (c == inv || c == 0xe9)) {
+                // Consonant Halant inv -> Consonant Halant ZWJ
+                // Consonant Halant Nukta -> Consonant Halant ZWJ
+                *uc++ = QChar(0x200d);
+            } else if (halant && c == 0xe8) {
+                // Consonant Halant Halant -> Consonant Halant ZWNJ
+                *uc++ = QChar(0x200c);
+            } else {
+                *uc++ = QChar(c+base);
+            }
+        }
+        halant = ((uchar)chars[i] == 0xe8);
+    }
+    result.resize(uc - result.unicode());
+
+    if (state) {
+        state->state_data[0] = halant;
+    }
+    return result;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_CODECS