diff options
Diffstat (limited to 'khexedit/lib/codecs/ktextcharcodec.cpp')
| -rw-r--r-- | khexedit/lib/codecs/ktextcharcodec.cpp | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/khexedit/lib/codecs/ktextcharcodec.cpp b/khexedit/lib/codecs/ktextcharcodec.cpp new file mode 100644 index 0000000..613dedd --- /dev/null +++ b/khexedit/lib/codecs/ktextcharcodec.cpp @@ -0,0 +1,236 @@ +/*************************************************************************** + ktextcharcodec.cpp - description + ------------------- + begin : Sa Nov 27 2004 + copyright : (C) 2004 by Friedrich W. H. Kossebau + email : [email protected] + ***************************************************************************/ + +/*************************************************************************** + * * + * This library is free software; you can redistribute it and/or * + * modify it under the terms of the GNU Library General Public * + * License version 2 as published by the Free Software Foundation. * + * * + ***************************************************************************/ + + +// qt specific +#include "qtextcodec.h" +// kde specific +#include <kglobal.h> +#include <klocale.h> +#include <kcharsets.h> +// lib specific +#include "ktextcharcodec.h" + + +using namespace KHE; + +static const char QTextCodecWhiteSpace = 63; + +static struct KEncodingNames { + KEncoding Encoding; + const char *Name; +} +const EncodingNames[] = { +{ ISO8859_1Encoding, "ISO 8859-1" }, +{ ISO8859_2Encoding, "ISO 8859-2" }, +{ ISO8859_3Encoding, "ISO 8859-3" }, +{ ISO8859_4Encoding, "ISO 8859-4" }, +{ ISO8859_5Encoding, "ISO 8859-5" }, +{ ISO8859_6Encoding, "ISO 8859-6" }, +{ ISO8859_7Encoding, "ISO 8859-7" }, +{ ISO8859_8Encoding, "ISO 8859-8" }, +{ ISO8859_8_IEncoding, "ISO 8859-8-I" }, +{ ISO8859_9Encoding, "ISO 8859-9" }, +{ ISO8859_11Encoding, "ISO 8859-11" }, +{ ISO8859_13Encoding, "ISO 8859-13" }, +{ ISO8859_15Encoding, "ISO 8859-15" }, +{ CP1250Encoding, "CP 1250" }, +{ CP1251Encoding, "CP 1251" }, +{ CP1252Encoding, "CP 1252" }, +{ CP1253Encoding, "CP 1253" }, +{ CP1254Encoding, "CP 1254" }, +{ CP1255Encoding, "CP 1255" }, +{ CP1256Encoding, "CP 1256" }, +{ CP1257Encoding, "CP 1257" }, +{ CP1258Encoding, "CP 1258" }, +{ IBM850Encoding, "IBM 850" }, +{ IBM866Encoding, "IBM 866" }, +{ KOI8_REncoding, "KOI8-R" }, +{ KOI8_UEncoding, "KOI8-U" } }; +//TODO: WS2 +static const unsigned int NoOfEncodings = 26; + +static bool is8Bit( QTextCodec *Codec ) +{ + bool Found = false; + for( unsigned int i=0; i<NoOfEncodings; ++i ) + { + if( qstrcmp(Codec->name(),EncodingNames[i].Name) == 0 ) + { + Found = true; + break; + } + } + return Found; +} + +static QTextCodec *createLatin1() +{ + return KGlobal::charsets()->codecForName( EncodingNames[0].Name ); +} + +/** heuristic seems to be doomed :( +static bool is8Bit( QTextCodec *Codec ) +{ + bool Result = true; + + // first test different for 0 + unsigned char c[4]; + c[0] = 0; + c[1] = c[2] = c[3] = 230; + QString S = Codec->toUnicode( (const char*)&c,4 ); + int Length = 1; + QCString CS = Codec->fromUnicode( S, Length ); + //kdDebug() << Codec->name() << " "<<Length << endl; + if( Length > 0 ) + Result = false; + // test if all chars survive the recoding + else + do + { + ++c[0]; + S = Codec->toUnicode( (const char*)&c,4 ); + Length = 1; + CS = Codec->fromUnicode( S, Length ); + //kdDebug() << Codec->name() << " "<<c[0]<<"->"<<CS[0]<<":"<<Length << endl; + if( Length != 1 || (CS[0] != (char)c[0] && CS[0] != QTextCodecWhiteSpace) ) + { + Result = false; + break; + } + } + while( c[0] < 255 ); + return Result; +} +const QStringList &KTextCharCodec::codecNames() +{ + // first call? + if( CodecNames.isEmpty() ) +{ + const QStringList &CharSets = KGlobal::charsets()->availableEncodingNames(); + + for( QStringList::ConstIterator it = CharSets.begin(); it != CharSets.end(); ++it ) +{ + bool Found = true; + QTextCodec* Codec = KGlobal::charsets()->codecForName( *it, Found ); + if( Found && is8Bit(Codec) ) + CodecNames.append( QString::fromLatin1(Codec->name()) ); +} +} + + return CodecNames; +} + +QString KTextCharCodec::nameOfEncoding( KEncoding C ) +{ + KTextCharCodec *Codec = 0; + + const char* N = 0; + for( unsigned int i=0; i<NoOfEncodings; ++i ) + { + if( EncodingNames[i].Encoding == C ) + { + N = EncodingNames[i].Name; + break; + } + } + + if( N != 0 ) + { + QString CodeName = QString::fromLatin1( N ); + } + return Codec; +} + */ + + +QStringList KTextCharCodec::CodecNames; + +KTextCharCodec *KTextCharCodec::createLocalCodec() +{ + QTextCodec *Codec = KGlobal::locale()->codecForEncoding(); + if( !is8Bit(Codec) ) + Codec = createLatin1(); + return new KTextCharCodec( Codec ); +} + + +KTextCharCodec *KTextCharCodec::createCodec( const QString &CodeName ) +{ + bool Ok; + QTextCodec *Codec = KGlobal::charsets()->codecForName( CodeName, Ok ); + if( Ok ) + Ok = is8Bit( Codec ); + return Ok ? new KTextCharCodec( Codec ) : 0; +} + + +const QStringList &KTextCharCodec::codecNames() +{ + // first call? + if( CodecNames.isEmpty() ) + { + for( unsigned int i=0; i<NoOfEncodings; ++i ) + { + bool Found = true; + QString Name = QString::fromLatin1( EncodingNames[i].Name ); + QTextCodec* Codec = KGlobal::charsets()->codecForName( Name, Found ); + if( Found ) + CodecNames.append( QString::fromLatin1(Codec->name()) ); + } + } + + return CodecNames; +} + + +KTextCharCodec::KTextCharCodec( QTextCodec *C ) + : Codec( C ), + Decoder( C->makeDecoder() ), + Encoder( C->makeEncoder() ) +{} + +KTextCharCodec::~KTextCharCodec() +{ + delete Decoder; + delete Encoder; +} + +bool KTextCharCodec::encode( char *D, const QChar &C ) const +{ + if( !Codec->canEncode(C) ) // TODO: do we really need the codec? + return false; + int dummy; + char T = Encoder->fromUnicode( C, dummy )[0]; + + *D = T; + return true; +} + + +KHEChar KTextCharCodec::decode( char Byte ) const +{ + QString S( Decoder->toUnicode(&Byte,1) ); + return KHEChar(S.at(0)); +} + + +const QString& KTextCharCodec::name() const +{ + if( Name.isNull() ) + Name = QString::fromLatin1( Codec->name() ); + return Name; +} |