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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:critical reason:data-parser
++
++ #include "qisciicodec_p.h"
++ #include "qtextcodec_p.h"
++ #include "qlist.h"
++
++ QT_BEGIN_NAMESPACE
++
++ /*!
++ \class QIsciiCodec
++ \inmodule QtCore5Compat
++ \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 }
++ };
++
++ QTextCodec *QIsciiCodec::create(const char *name)
++ {
++ QIsciiCodec *codec = nullptr;
++ for (int i = 0; i < 9; ++i) {
++ if (qTextCodecNameMatch(name, codecs[i].name)) {
++ codec = new QIsciiCodec(i);
++ break;
++ }
++ }
++ return codec;
++ }
++
++ 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_PREPEND_NAMESPACE(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) {
++ Q_ASSERT((2 * iscii) < (sizeof(uni_to_iscii_pairs) / sizeof(uni_to_iscii_pairs[0])));
++ 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_PREPEND_NAMESPACE(Qt::Uninitialized));
++ QChar *uc = result.data();
++
++ const int base = codecs[idx].base;
++
++ for (int i = 0; i < len; ++i) {
++ char16_t ch = (uchar) chars[i];
++ if (ch < 0xa0)
++ *uc++ = ch;
++ else {
++ ushort c = iscii_to_uni_table[ch - 0xa0];
++ if (halant && (ch == inv || ch == 0xe9)) {
++ // Consonant Halant inv -> Consonant Halant ZWJ
++ // Consonant Halant Nukta -> Consonant Halant ZWJ
++ *uc++ = QChar(0x200d);
++ } else if (halant && ch == 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