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/*
* Copyright (C) 2007-2011 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_UTF_STRING_H
#define BU_UTF_STRING_H
#include <stdint.h>
#include "bu/array.h"
namespace Bu
{
class String;
class Stream;
/**
* UtfChar isn't actually a character, unicode specifies "code points" not
* characters. The main reason for this is that not all code points define
* usable characters. Some control text directionality, some apply
* properties to other code points which are characters. However, most of
* these distinctions are only important when implementing displays that
* comply with the Unicode standard fully.
*/
typedef uint32_t UtfChar;
class UtfString
{
public:
enum Encoding
{
Utf8,
Utf16,
Utf16be,
Utf16le,
Utf32,
Utf32be,
Utf32le,
Ucs2,
Ucs4,
GuessEncoding
};
UtfString();
UtfString( const Bu::String &sInput, Encoding eEnc=Utf8 );
virtual ~UtfString();
class iterator
{
private:
iterator( UtfString *pSrc, int iCodePos ) :
pSrc( pSrc ), iCodePos( iCodePos )
{
}
public:
iterator() :
pSrc( NULL ), iCodePos( 0 )
{
}
UtfChar operator*()
{
if( !pSrc )
throw Bu::ExceptionBase("invalid UtfString::iterator dereferenced.");
return pSrc->nextChar( iCodePos );
}
private:
UtfString *pSrc;
int iCodePos;
};
void append( UtfChar ch );
void set( const Bu::String &sInput, Encoding eEnc=Utf8 );
void setUtf8( const Bu::String &sInput );
void setUtf16( const Bu::String &sInput );
void setUtf16be( const Bu::String &sInput );
void setUtf16le( const Bu::String &sInput );
void setUtf32( const Bu::String &sInput );
void setUtf32be( const Bu::String &sInput );
void setUtf32le( const Bu::String &sInput );
void write( Bu::Stream &sOut, Encoding eEnc=Utf8 );
void writeUtf8( Bu::Stream &sOut );
void writeUtf16be( Bu::Stream &sOut );
void writeUtf16le( Bu::Stream &sOut );
void writeUtf32be( Bu::Stream &sOut );
void writeUtf32le( Bu::Stream &sOut );
Bu::String to( Encoding eEnc=Utf8 );
Bu::String toUtf8();
void debug();
UtfChar get( int iIndex );
UtfChar nextChar( int &iIndex );
private:
void append16( uint16_t i ) { aData.append( i ); }
private:
Bu::Array<uint16_t> aData;
int iRawLen;
int iCharLen;
};
};
#endif
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