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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/
#ifndef _SWGSTR_HXX
#define _SWGSTR_HXX

#include <tools/stream.hxx>

typedef long long3;						// Zur Dokumentation: 3-byte-Longs

#define MAX_BEGIN 64					// Maximale Blockschachtelung
#define PASSWDLEN 16					// Maximale Passwortlaenge

// Neue Version mit SvStreams

// Passwort- und Codierungs-Funktionalitaet

class swcrypter {
protected:
    sal_Char   cPasswd[ PASSWDLEN ];	// Passwort-Puffer
    BOOL   bPasswd;						// TRUE wenn mit Passwort
    void   encode( sal_Char*, USHORT );	// Puffer codieren/decodieren
public:
    swcrypter();
    BOOL setpasswd( const String& );	// Passwort setzen
    void copypasswd( const sal_Char* );	// Passwort direkt setzen
    const sal_Char* getpasswd() { return cPasswd; }
};

// Reader/Writer-Stream-Basisklasse mit Pufferverwaltung fuer Texte
// und Spezial-I/O fuer 3-Byte-Longs

class swstreambase : public swcrypter {
protected:
    SvStream* pStrm;					// eigentlicher Stream
    sal_Char*  pBuf; 						// Zwischenpuffer
    USHORT nBuflen;						// Laenge des Zwischenpuffers
    short  nLong;						// Long-Laenge (3 oder 4)
    BOOL   bTempStrm;					// TRUE: Stream loeschen
    void   checkbuf( USHORT );			// Testen der Pufferlaenge

    swstreambase( SvStream& );

    swstreambase( const swstreambase& );
    int operator=( const swstreambase& );
public:
    ~swstreambase();
    SvStream& Strm()					{ return *pStrm; }
    void clear();						// Puffer loeschen

    // Zusatzfunktionen zur I/O von LONGs als 3-Byte-Zahlen

    void long3() 						{ nLong = 3; }
    void long4() 						{ nLong = 4; }

    // Alias- und Hilfsfunktionen

    void seek( long nPos )				{ pStrm->Seek( nPos );  }
    long tell()							{ return pStrm->Tell(); }
    long filesize(); 					// Dateigroesse

    void setbad();
    int good()                          { return ( pStrm->GetError() == SVSTREAM_OK ); }
    int operator!()                     { return ( pStrm->GetError() != SVSTREAM_OK ); }
    int eof()                           { return pStrm->IsEof(); }

    BYTE get();
    void get( void* p, USHORT n )		{ pStrm->Read( (sal_Char*) p, n ); }

    inline swstreambase& operator>>( sal_Char& );
    inline swstreambase& operator>>( BYTE& );
    inline swstreambase& operator>>( short& );
    inline swstreambase& operator>>( USHORT& );
           swstreambase& operator>>( long& );
    inline swstreambase& operator>>( ULONG& );
};

inline swstreambase& swstreambase::operator>>( sal_Char& c )
{
    *pStrm >> c; return *this;
}

inline swstreambase& swstreambase::operator>>( BYTE& c )
{
    *pStrm >> c; return *this;
}

inline swstreambase& swstreambase::operator>>( short& c )
{
    *pStrm >> c; return *this;
}

inline swstreambase& swstreambase::operator>>( USHORT& c )
{
    *pStrm >> c; return *this;
}

inline swstreambase& swstreambase::operator>>( ULONG& c )
{
    return *this >> (long&) c;
}

class swistream : public swstreambase {
    BYTE   cType;						// Record-Typ
    ULONG  nOffset;						// Record-Offset-Portion
public:
    swistream( SvStream& );

    BYTE peek();						// 1 Byte testen
    BYTE next();						// Blockstart
    BYTE cur() { return cType; }		// aktueller Block
    BYTE skipnext();					// Record ueberspringen
    void undonext();					// next() rueckgaengig machen
    long getskip()						{ return nOffset; }
    void skip( long = -1L );			// Block ueberspringen
    sal_Char* text();					// Textstring lesen (nach BEGIN)
    long size();						// aktuelle Record-Laenge

private:
    swistream( const swistream& );
    int operator=( const swistream& );
};


#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */