worldspawn/libs/bytestreamutils.h

/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_BYTESTREAMUTILS_H )
#define INCLUDED_BYTESTREAMUTILS_H

#include "globaldefs.h"

#if GDEF_COMPILER_GNU

#define _ISOC9X_SOURCE  1
#define _ISOC99_SOURCE  1

#define __USE_ISOC9X    1
#define __USE_ISOC99    1

#include <stdint.h>

#endif

#include <algorithm>

// if C99 is unavailable, fall back to the types most likely to be the right sizes
#if !defined( int16_t )
typedef signed short int16_t;
#endif
#if !defined( uint16_t )
typedef unsigned short uint16_t;
#endif
#if !defined( int32_t )
typedef signed int int32_t;
#endif
#if !defined( uint32_t )
typedef unsigned int uint32_t;
#endif




template<typename InputStreamType, typename Type>
inline void istream_read_little_endian( InputStreamType& istream, Type& value ){
	istream.read(reinterpret_cast<typename InputStreamType::byte_type *>( &value ), sizeof(Type));
	if (GDEF_ARCH_ENDIAN_BIG) {
		std::reverse(reinterpret_cast<typename InputStreamType::byte_type *>( &value ),
					 reinterpret_cast<typename InputStreamType::byte_type *>( &value ) + sizeof(Type));
	}
}

template<typename InputStreamType, typename Type>
inline void istream_read_big_endian( InputStreamType& istream, Type& value ){
	istream.read(reinterpret_cast<typename InputStreamType::byte_type *>( &value ), sizeof(Type));
	if (!GDEF_ARCH_ENDIAN_BIG) {
		std::reverse(reinterpret_cast<typename InputStreamType::byte_type *>( &value ),
					 reinterpret_cast<typename InputStreamType::byte_type *>( &value ) + sizeof(Type));
	}
}

template<typename InputStreamType>
inline void istream_read_byte( InputStreamType& istream, typename InputStreamType::byte_type& b ){
	istream.read( &b, 1 );
}


template<typename InputStreamType>
inline int16_t istream_read_int16_le( InputStreamType& istream ){
	int16_t value;
	istream_read_little_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline int16_t istream_read_int16_be( InputStreamType& istream ){
	int16_t value;
	istream_read_big_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline uint16_t istream_read_uint16_le( InputStreamType& istream ){
	uint16_t value;
	istream_read_little_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline uint16_t istream_read_uint16_be( InputStreamType& istream ){
	uint16_t value;
	istream_read_big_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline int32_t istream_read_int32_le( InputStreamType& istream ){
	int32_t value;
	istream_read_little_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline int32_t istream_read_int32_be( InputStreamType& istream ){
	int32_t value;
	istream_read_big_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline uint32_t istream_read_uint32_le( InputStreamType& istream ){
	uint32_t value;
	istream_read_little_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline uint32_t istream_read_uint32_be( InputStreamType& istream ){
	uint32_t value;
	istream_read_big_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline float istream_read_float32_le( InputStreamType& istream ){
	float value;
	istream_read_little_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline float istream_read_float32_be( InputStreamType& istream ){
	float value;
	istream_read_big_endian( istream, value );
	return value;
}

template<typename InputStreamType>
inline typename InputStreamType::byte_type istream_read_byte( InputStreamType& istream ){
	typename InputStreamType::byte_type b;
	istream.read( &b, sizeof( typename InputStreamType::byte_type ) );
	return b;
}

#endif