1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/assimp/ByteSwap.h	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,285 @@
     1.4 +/*
     1.5 +Open Asset Import Library (assimp)
     1.6 +----------------------------------------------------------------------
     1.7 +
     1.8 +Copyright (c) 2006-2012, assimp team
     1.9 +All rights reserved.
    1.10 +
    1.11 +Redistribution and use of this software in source and binary forms, 
    1.12 +with or without modification, are permitted provided that the 
    1.13 +following conditions are met:
    1.14 +
    1.15 +* Redistributions of source code must retain the above
    1.16 +  copyright notice, this list of conditions and the
    1.17 +  following disclaimer.
    1.18 +
    1.19 +* Redistributions in binary form must reproduce the above
    1.20 +  copyright notice, this list of conditions and the
    1.21 +  following disclaimer in the documentation and/or other
    1.22 +  materials provided with the distribution.
    1.23 +
    1.24 +* Neither the name of the assimp team, nor the names of its
    1.25 +  contributors may be used to endorse or promote products
    1.26 +  derived from this software without specific prior
    1.27 +  written permission of the assimp team.
    1.28 +
    1.29 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
    1.30 +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
    1.31 +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    1.32 +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
    1.33 +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    1.34 +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
    1.35 +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    1.36 +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
    1.37 +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
    1.38 +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
    1.39 +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    1.40 +
    1.41 +----------------------------------------------------------------------
    1.42 +*/
    1.43 +
    1.44 +/** @file Helper class tp perform various byte oder swappings 
    1.45 +   (e.g. little to big endian) */
    1.46 +#ifndef AI_BYTESWAP_H_INC
    1.47 +#define AI_BYTESWAP_H_INC
    1.48 +
    1.49 +#include "assimp/ai_assert.h"
    1.50 +#include "assimp/types.h"
    1.51 +
    1.52 +#if _MSC_VER >= 1400 
    1.53 +#include <stdlib.h>
    1.54 +#endif
    1.55 +
    1.56 +namespace Assimp	{
    1.57 +// --------------------------------------------------------------------------------------
    1.58 +/** Defines some useful byte order swap routines.
    1.59 + * 
    1.60 + * This is required to read big-endian model formats on little-endian machines,
    1.61 + * and vice versa. Direct use of this class is DEPRECATED. Use #StreamReader instead. */
    1.62 +// --------------------------------------------------------------------------------------
    1.63 +class ByteSwap
    1.64 +{
    1.65 +	ByteSwap() {}
    1.66 +
    1.67 +public:
    1.68 +
    1.69 +	// ----------------------------------------------------------------------
    1.70 +	/** Swap two bytes of data
    1.71 +	 *  @param[inout] _szOut A void* to save the reintcasts for the caller. */
    1.72 +	static inline void Swap2(void* _szOut)
    1.73 +	{
    1.74 +		ai_assert(_szOut);
    1.75 +
    1.76 +#if _MSC_VER >= 1400
    1.77 +		uint16_t* const szOut = reinterpret_cast<uint16_t*>(_szOut);
    1.78 +		*szOut = _byteswap_ushort(*szOut);
    1.79 +#else
    1.80 +		uint8_t* const szOut = reinterpret_cast<uint8_t*>(_szOut);
    1.81 +		std::swap(szOut[0],szOut[1]);
    1.82 +#endif
    1.83 +	}
    1.84 +
    1.85 +	// ----------------------------------------------------------------------
    1.86 +	/** Swap four bytes of data
    1.87 +	 *  @param[inout] _szOut A void* to save the reintcasts for the caller. */
    1.88 +	static inline void Swap4(void* _szOut)
    1.89 +	{
    1.90 +		ai_assert(_szOut);
    1.91 +
    1.92 +#if _MSC_VER >= 1400
    1.93 +		uint32_t* const szOut = reinterpret_cast<uint32_t*>(_szOut);
    1.94 +		*szOut = _byteswap_ulong(*szOut);
    1.95 +#else
    1.96 +		uint8_t* const szOut = reinterpret_cast<uint8_t*>(_szOut);
    1.97 +		std::swap(szOut[0],szOut[3]);
    1.98 +		std::swap(szOut[1],szOut[2]);
    1.99 +#endif
   1.100 +	}
   1.101 +
   1.102 +	// ----------------------------------------------------------------------
   1.103 +	/** Swap eight bytes of data
   1.104 +	 *  @param[inout] _szOut A void* to save the reintcasts for the caller. */
   1.105 +	static inline void Swap8(void* _szOut)
   1.106 +	{
   1.107 +	ai_assert(_szOut);
   1.108 +
   1.109 +#if _MSC_VER >= 1400
   1.110 +		uint64_t* const szOut = reinterpret_cast<uint64_t*>(_szOut);
   1.111 +		*szOut = _byteswap_uint64(*szOut);
   1.112 +#else
   1.113 +		uint8_t* const szOut = reinterpret_cast<uint8_t*>(_szOut);
   1.114 +		std::swap(szOut[0],szOut[7]);
   1.115 +		std::swap(szOut[1],szOut[6]);
   1.116 +		std::swap(szOut[2],szOut[5]);
   1.117 +		std::swap(szOut[3],szOut[4]);
   1.118 +#endif
   1.119 +	}
   1.120 +
   1.121 +	// ----------------------------------------------------------------------
   1.122 +	/** ByteSwap a float. Not a joke.
   1.123 +	 *  @param[inout] fOut ehm. .. */
   1.124 +	static inline void Swap(float* fOut) {
   1.125 +		Swap4(fOut);
   1.126 +	}
   1.127 +
   1.128 +	// ----------------------------------------------------------------------
   1.129 +	/** ByteSwap a double. Not a joke.
   1.130 +	 *  @param[inout] fOut ehm. .. */
   1.131 +	static inline void Swap(double* fOut) {
   1.132 +		Swap8(fOut);
   1.133 +	}
   1.134 +
   1.135 +
   1.136 +	// ----------------------------------------------------------------------
   1.137 +	/** ByteSwap an int16t. Not a joke.
   1.138 +	 *  @param[inout] fOut ehm. .. */
   1.139 +	static inline void Swap(int16_t* fOut) {
   1.140 +		Swap2(fOut);
   1.141 +	}
   1.142 +
   1.143 +	static inline void Swap(uint16_t* fOut) {
   1.144 +		Swap2(fOut);
   1.145 +	}
   1.146 +
   1.147 +	// ----------------------------------------------------------------------
   1.148 +	/** ByteSwap an int32t. Not a joke.
   1.149 +	 *  @param[inout] fOut ehm. .. */
   1.150 +	static inline void Swap(int32_t* fOut){
   1.151 +		Swap4(fOut);
   1.152 +	}
   1.153 +
   1.154 +	static inline void Swap(uint32_t* fOut){
   1.155 +		Swap4(fOut);
   1.156 +	}
   1.157 +
   1.158 +	// ----------------------------------------------------------------------
   1.159 +	/** ByteSwap an int64t. Not a joke.
   1.160 +	 *  @param[inout] fOut ehm. .. */
   1.161 +	static inline void Swap(int64_t* fOut) {
   1.162 +		Swap8(fOut);
   1.163 +	}
   1.164 +
   1.165 +	static inline void Swap(uint64_t* fOut) {
   1.166 +		Swap8(fOut);
   1.167 +	}
   1.168 +
   1.169 +	// ----------------------------------------------------------------------
   1.170 +	//! Templatized ByteSwap
   1.171 +	//! \returns param tOut as swapped
   1.172 +	template<typename Type> 
   1.173 +	static inline Type Swapped(Type tOut)
   1.174 +	{
   1.175 +		return _swapper<Type,sizeof(Type)>()(tOut);
   1.176 +	}
   1.177 +
   1.178 +private:
   1.179 +
   1.180 +	template <typename T, size_t size> struct _swapper;
   1.181 +};
   1.182 +
   1.183 +template <typename T> struct ByteSwap::_swapper<T,2> {
   1.184 +	T operator() (T tOut) {
   1.185 +		Swap2(&tOut); 
   1.186 +		return tOut;
   1.187 +	}
   1.188 +};
   1.189 +
   1.190 +template <typename T> struct ByteSwap::_swapper<T,4> {
   1.191 +	T operator() (T tOut) {
   1.192 +		Swap4(&tOut); 
   1.193 +		return tOut;
   1.194 +	}
   1.195 +};
   1.196 +
   1.197 +template <typename T> struct ByteSwap::_swapper<T,8> {
   1.198 +	T operator() (T tOut) {
   1.199 +		Swap8(&tOut); 
   1.200 +		return tOut;
   1.201 +	}
   1.202 +};
   1.203 +
   1.204 +
   1.205 +// --------------------------------------------------------------------------------------
   1.206 +// ByteSwap macros for BigEndian/LittleEndian support 
   1.207 +// --------------------------------------------------------------------------------------
   1.208 +#if (defined AI_BUILD_BIG_ENDIAN)
   1.209 +#	define AI_LE(t)	(t)
   1.210 +#	define AI_BE(t) ByteSwap::Swapped(t)
   1.211 +#	define AI_LSWAP2(p)
   1.212 +#	define AI_LSWAP4(p)
   1.213 +#	define AI_LSWAP8(p)
   1.214 +#	define AI_LSWAP2P(p)
   1.215 +#	define AI_LSWAP4P(p)
   1.216 +#	define AI_LSWAP8P(p)
   1.217 +#	define LE_NCONST const
   1.218 +#	define AI_SWAP2(p) ByteSwap::Swap2(&(p))
   1.219 +#	define AI_SWAP4(p) ByteSwap::Swap4(&(p))
   1.220 +#	define AI_SWAP8(p) ByteSwap::Swap8(&(p))
   1.221 +#	define AI_SWAP2P(p) ByteSwap::Swap2((p))
   1.222 +#	define AI_SWAP4P(p) ByteSwap::Swap4((p))
   1.223 +#	define AI_SWAP8P(p) ByteSwap::Swap8((p))
   1.224 +#	define BE_NCONST
   1.225 +#else
   1.226 +#	define AI_BE(t)	(t)
   1.227 +#	define AI_LE(t) ByteSwap::Swapped(t)
   1.228 +#	define AI_SWAP2(p)
   1.229 +#	define AI_SWAP4(p)
   1.230 +#	define AI_SWAP8(p)
   1.231 +#	define AI_SWAP2P(p)
   1.232 +#	define AI_SWAP4P(p)
   1.233 +#	define AI_SWAP8P(p)
   1.234 +#	define BE_NCONST const
   1.235 +#	define AI_LSWAP2(p)		ByteSwap::Swap2(&(p))
   1.236 +#	define AI_LSWAP4(p)		ByteSwap::Swap4(&(p))
   1.237 +#	define AI_LSWAP8(p)		ByteSwap::Swap8(&(p))
   1.238 +#	define AI_LSWAP2P(p)	ByteSwap::Swap2((p))
   1.239 +#	define AI_LSWAP4P(p)	ByteSwap::Swap4((p))
   1.240 +#	define AI_LSWAP8P(p)	ByteSwap::Swap8((p))
   1.241 +#	define LE_NCONST
   1.242 +#endif
   1.243 +
   1.244 +
   1.245 +namespace Intern {
   1.246 +
   1.247 +// --------------------------------------------------------------------------------------------
   1.248 +template <typename T, bool doit>
   1.249 +struct ByteSwapper	{
   1.250 +	void operator() (T* inout) {
   1.251 +		ByteSwap::Swap(inout);
   1.252 +	}
   1.253 +};
   1.254 +
   1.255 +template <typename T> 
   1.256 +struct ByteSwapper<T,false>	{
   1.257 +	void operator() (T*) {
   1.258 +	}
   1.259 +};
   1.260 +
   1.261 +// --------------------------------------------------------------------------------------------
   1.262 +template <bool SwapEndianess, typename T, bool RuntimeSwitch>
   1.263 +struct Getter {
   1.264 +	void operator() (T* inout, bool le) {
   1.265 +#ifdef AI_BUILD_BIG_ENDIAN
   1.266 +		le =  le;
   1.267 +#else
   1.268 +		le =  !le;
   1.269 +#endif
   1.270 +		if (le) {
   1.271 +			ByteSwapper<T,(sizeof(T)>1?true:false)> () (inout);
   1.272 +		}
   1.273 +		else ByteSwapper<T,false> () (inout);
   1.274 +	}
   1.275 +};
   1.276 +
   1.277 +template <bool SwapEndianess, typename T> 
   1.278 +struct Getter<SwapEndianess,T,false> {
   1.279 +
   1.280 +	void operator() (T* inout, bool /*le*/) {
   1.281 +		// static branch
   1.282 +		ByteSwapper<T,(SwapEndianess && sizeof(T)>1)> () (inout);
   1.283 +	}
   1.284 +};
   1.285 +} // end Intern
   1.286 +} // end Assimp
   1.287 +
   1.288 +#endif //!! AI_BYTESWAP_H_INC