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// Description:
// A compressed (file) input/output stream.
//
// Copyright (C) 2005 Frank Becker
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation; either version 2 of the License, or (at your option) any later
// version.
//
// This program 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 General Public License for more details
//
#include <cstdlib>
#include <Trace.hpp>
#include <Endian.hpp>
#include <zStream.hpp>
#include <zStreamBufferImplLZMA.hpp>
#include <zStreamBufferImplZLib.hpp>
ofstream &operator<<( ofstream &outfile, Uint32 i)
{
char *pi = (char*)&i;
if( ! ::isLittleEndian()) swap( pi, 4);
outfile.write( pi, 4);
return outfile;
}
ifstream &operator>>( ifstream &infile, Uint32 &i)
{
char *pi = (char*)&i;
infile.read( pi, 4);
if( ! ::isLittleEndian()) swap( pi, 4);
return infile;
}
//-----------------------------------------------------------------------------
ziStreamBuffer::ziStreamBuffer( ifstream &fd):
_fstream( fd),
_isOK(false),
_impl(0)
{
XTRACE();
_init();
}
void ziStreamBuffer::_init( void)
{
XTRACE();
if( !_fstream.is_open())
{
LOG_ERROR << "Input stream not open!" << endl;
}
// xsetflags( ios::binary);
Uint32 magic;
_fstream >> magic;
// LOG_INFO << "Magic 0x" << hex << magic << dec << endl;
if( magic == ZSTREAM_MAGIC)
{
_impl = new ziStreamBufferImplZLib( _fstream);
}
else if( magic == LZMASTREAM_MAGIC)
{
#ifdef USE_LZMA
_impl = new ziStreamBufferImplLZMA( _fstream);
#else
LOG_ERROR << "LZMA not supported\n";
exit(-1);
#endif
}
else
{
_fstream.seekg( -4, ios::cur);
_impl = new ziStreamBufferImpl( _fstream);
}
_isOK = _impl->init();
}
ziStreamBuffer::~ziStreamBuffer()
{
XTRACE();
delete _impl;
}
streamsize ziStreamBuffer::xsgetn(char* s, streamsize n)
{
XTRACE();
if( _impl->isEOF()) return EOF;
streamsize numBytes = _impl->read( s, n);
return numBytes;
}
//-----------------------------------------------------------------------------
zoStreamBuffer::zoStreamBuffer( ofstream &fd, CompressionType compressionType):
_fstream( fd),
_isOK(false),
_impl(0)
{
XTRACE();
switch( compressionType)
{
case eZLibCompression:
_impl = new zoStreamBufferImplZLib( fd);
break;
case eLZMACompression:
#ifdef USE_LZMA
_impl = new zoStreamBufferImplLZMA( fd);
#else
LOG_ERROR << "LZMA not supported\n";
#endif
break;
case eNoCompression:
default:
_impl = new zoStreamBufferImpl( fd);
break;
}
_init();
}
void zoStreamBuffer::_init( void)
{
XTRACE();
if( !_fstream.is_open())
{
LOG_ERROR << "Output stream not open!" << endl;
}
// xsetflags( ios::binary);
_isOK = _impl->init();
}
zoStreamBuffer::~zoStreamBuffer()
{
XTRACE();
delete _impl;
}
streamsize zoStreamBuffer::xsputn(const char* s, streamsize n)
{
// XTRACE();
streamsize numBytes = _impl->write( s, n);
return numBytes;
}
//-----------------------------------------------------------------------------
//Note: This rather stupid looking *new + ref for _streambuf is to avoid
//gcc asking for -fhuge-objects when cross compiling to windows.
ziStream::ziStream( ifstream &inf):
super(0),
_streambuf( * new ziStreamBuffer( inf))
{
XTRACE();
init( &_streambuf);
}
ziStream::~ziStream()
{
XTRACE();
delete &_streambuf;
}
//-----------------------------------------------------------------------------
zoStream::zoStream( ofstream &outf, CompressionType compressionType):
super(0),
_streambuf( * new zoStreamBuffer( outf, compressionType))
{
XTRACE();
init( &_streambuf);
}
zoStream::~zoStream()
{
XTRACE();
delete &_streambuf;
}
//-----------------------------------------------------------------------------
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