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/*****************************************************************************
** FILE IDENTIFICATION
**
** Name: fnetorderstream.h
** Purpose: Network-order file stream header
** Programmer: Kevin Rosenberg
** Date Started: Sep 2000
**
** This is part of the CTSim program
** Copyright (c) 1983-2001 Kevin Rosenberg
**
** $Id: fnetorderstream.h 7061 2003-09-07 06:34:45Z kevin $
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License (version 2) as
** published by the Free Software Foundation.
**
** 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.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
******************************************************************************/
#ifndef NETORDER_H
#define NETORDER_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <fstream>
#include <iostream>
#include <string>
inline bool NativeBigEndian (void)
{
#ifdef WORDS_BIGENDIAN
return true;
#else
return false;
#endif
}
inline void
SwapBytes2 (void* buffer)
{
unsigned char* p = static_cast<unsigned char*>(buffer);
unsigned char temp = p[0];
p[0] = p[1];
p[1] = temp;
}
// 0<->3 1<->2 = 0123 -> 3210
inline void
SwapBytes4 (void* buffer)
{
unsigned char* p = static_cast<unsigned char*>(buffer);
unsigned char temp = p[0];
p[0] = p[3];
p[3] = temp;
temp = p[1];
p[1] = p[2];
p[2] = temp;
}
// 0<->7 1<->6 2<->5 3<->4 = 01234567 -> 76543210
inline void
SwapBytes8 (void* buffer)
{
unsigned char* p = static_cast<unsigned char*>(buffer);
unsigned char temp = p[0];
p[0] = p[7];
p[7] = temp;
temp = p[1];
p[1] = p[6];
p[6] = temp;
temp = p[2];
p[2] = p[5];
p[5] = temp;
temp = p[3];
p[3] = p[4];
p[4] = temp;
}
inline void
SwapBytes2IfLittleEndian (void* buffer)
{
#ifndef WORDS_BIGENDIAN
SwapBytes2 (buffer);
#endif
}
inline void
SwapBytes4IfLittleEndian (void* buffer)
{
#ifndef WORDS_BIGENDIAN
SwapBytes4 (buffer);
#endif
}
inline void
SwapBytes8IfLittleEndian (void* buffer)
{
#ifndef WORDS_BIGENDIAN
SwapBytes8 (buffer);
#endif
}
void ConvertNetworkOrder (void* buffer, size_t bytes);
void ConvertReverseNetworkOrder (void* buffer, size_t bytes);
using std::fstream;
class fnetorderstream : public fstream {
public:
fnetorderstream (const char* filename, std::ios::openmode mode)
: fstream (filename, mode) {}
~fnetorderstream (void)
{}
virtual void writeInt16 (kuint16 n);
virtual void writeInt32 (kuint32 n);
virtual void writeFloat32 (kfloat32 n);
virtual void writeFloat64 (kfloat64 n);
virtual void readInt16 (kuint16& n);
virtual void readInt32 (kuint32& n);
virtual void readFloat32 (kfloat32& n);
virtual void readFloat64 (kfloat64& n);
};
class frnetorderstream : public fnetorderstream {
public:
frnetorderstream (const char* filename, std::ios::openmode mode)
: fnetorderstream (filename, mode) {}
virtual void writeInt16 (kuint16 n);
virtual void writeInt32 (kuint32 n);
virtual void writeFloat32 (kfloat32 n);
virtual void writeFloat64 (kfloat64 n);
virtual void readInt16 (kuint16& n);
virtual void readInt32 (kuint32& n);
virtual void readFloat32 (kfloat32& n);
virtual void readFloat64 (kfloat64& n);
};
#endif
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