/**************************************************************************** ** ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the QtCore module of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. 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. ** ** In addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.0, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** In addition, as a special exception, Trolltech, as the sole copyright ** holder for Qt Designer, grants users of the Qt/Eclipse Integration ** plug-in the right for the Qt/Eclipse Integration to link to ** functionality provided by Qt Designer and its related libraries. ** ** Trolltech reserves all rights not expressly granted herein. ** ** Trolltech ASA (c) 2007 ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #include "qisciicodec_p.h" #include "qlist.h" #ifndef QT_NO_CODECS /*! \class QIsciiCodec \brief The QIsciiCodec class provides conversion to and from the ISCII encoding. \internal */ struct Codecs { const char *name; 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; result.resize(2*len); //worst case uchar *ch = reinterpret_cast(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(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; result.resize(len); 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; } #endif // QT_NO_CODECS