1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/assimp/MemoryIOWrapper.h	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,190 @@
     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 MemoryIOWrapper.h
    1.45 + *  Handy IOStream/IOSystem implemetation to read directly from a memory buffer */
    1.46 +#ifndef AI_MEMORYIOSTREAM_H_INC
    1.47 +#define AI_MEMORYIOSTREAM_H_INC
    1.48 +namespace Assimp	{
    1.49 +#define AI_MEMORYIO_MAGIC_FILENAME "$$$___magic___$$$"
    1.50 +#define AI_MEMORYIO_MAGIC_FILENAME_LENGTH 17
    1.51 +
    1.52 +// ----------------------------------------------------------------------------------
    1.53 +/** Implementation of IOStream to read directly from a memory buffer */
    1.54 +// ----------------------------------------------------------------------------------
    1.55 +class MemoryIOStream : public IOStream
    1.56 +{
    1.57 +	//friend class MemoryIOSystem;
    1.58 +public:
    1.59 +	MemoryIOStream (const uint8_t* buff, size_t len, bool own = false) 
    1.60 +		: buffer (buff)
    1.61 +		, length(len)
    1.62 +		, pos((size_t)0)
    1.63 +		, own(own) 
    1.64 +	{
    1.65 +	}
    1.66 +
    1.67 +public:
    1.68 +
    1.69 +	~MemoryIOStream ()	{
    1.70 +		if(own) {
    1.71 +			delete[] buffer;
    1.72 +		}
    1.73 +	}
    1.74 +
    1.75 +	// -------------------------------------------------------------------
    1.76 +	// Read from stream
    1.77 +    size_t Read(void* pvBuffer, size_t pSize, size_t pCount)	{
    1.78 +		const size_t cnt = std::min(pCount,(length-pos)/pSize),ofs = pSize*cnt;
    1.79 +		
    1.80 +		memcpy(pvBuffer,buffer+pos,ofs);
    1.81 +		pos += ofs;
    1.82 +
    1.83 +		return cnt;
    1.84 +	}
    1.85 +
    1.86 +	// -------------------------------------------------------------------
    1.87 +	// Write to stream
    1.88 +	size_t Write(const void* /*pvBuffer*/, size_t /*pSize*/,size_t /*pCount*/)	{
    1.89 +		ai_assert(false); // won't be needed
    1.90 +		return 0;
    1.91 +	}
    1.92 +
    1.93 +	// -------------------------------------------------------------------
    1.94 +	// Seek specific position
    1.95 +	aiReturn Seek(size_t pOffset, aiOrigin pOrigin) {
    1.96 +		if (aiOrigin_SET == pOrigin) {
    1.97 +			if (pOffset >= length) {
    1.98 +				return AI_FAILURE;
    1.99 +			}
   1.100 +			pos = pOffset;
   1.101 +		}
   1.102 +		else if (aiOrigin_END == pOrigin) {
   1.103 +			if (pOffset >= length) {
   1.104 +				return AI_FAILURE;
   1.105 +			}
   1.106 +			pos = length-pOffset;
   1.107 +		}
   1.108 +		else {
   1.109 +			if (pOffset+pos >= length) {
   1.110 +				return AI_FAILURE;
   1.111 +			}
   1.112 +			pos += pOffset;
   1.113 +		}
   1.114 +		return AI_SUCCESS;
   1.115 +	}
   1.116 +
   1.117 +	// -------------------------------------------------------------------
   1.118 +	// Get current seek position
   1.119 +	size_t Tell() const {
   1.120 +		return pos;
   1.121 +	}
   1.122 +
   1.123 +	// -------------------------------------------------------------------
   1.124 +	// Get size of file
   1.125 +	size_t FileSize() const {
   1.126 +		return length;
   1.127 +	}
   1.128 +
   1.129 +	// -------------------------------------------------------------------
   1.130 +	// Flush file contents
   1.131 +	void Flush() {
   1.132 +		ai_assert(false); // won't be needed
   1.133 +	}
   1.134 +
   1.135 +private:
   1.136 +	const uint8_t* buffer;
   1.137 +	size_t length,pos;
   1.138 +	bool own;
   1.139 +};
   1.140 +
   1.141 +// ---------------------------------------------------------------------------
   1.142 +/** Dummy IO system to read from a memory buffer */
   1.143 +class MemoryIOSystem : public IOSystem
   1.144 +{
   1.145 +public:
   1.146 +	/** Constructor. */
   1.147 +    MemoryIOSystem (const uint8_t* buff, size_t len) 
   1.148 +		: buffer (buff), length(len) {
   1.149 +	}
   1.150 +
   1.151 +	/** Destructor. */
   1.152 +	~MemoryIOSystem() {
   1.153 +	}
   1.154 +
   1.155 +	// -------------------------------------------------------------------
   1.156 +	/** Tests for the existence of a file at the given path. */
   1.157 +	bool Exists( const char* pFile) const {
   1.158 +		return !strncmp(pFile,AI_MEMORYIO_MAGIC_FILENAME,AI_MEMORYIO_MAGIC_FILENAME_LENGTH);
   1.159 +	}
   1.160 +
   1.161 +	// -------------------------------------------------------------------
   1.162 +	/** Returns the directory separator. */
   1.163 +	char getOsSeparator() const {
   1.164 +		return '/'; // why not? it doesn't care
   1.165 +	}
   1.166 +
   1.167 +	// -------------------------------------------------------------------
   1.168 +	/** Open a new file with a given path. */
   1.169 +	IOStream* Open( const char* pFile, const char* /*pMode*/ = "rb") {
   1.170 +		if (strncmp(pFile,AI_MEMORYIO_MAGIC_FILENAME,AI_MEMORYIO_MAGIC_FILENAME_LENGTH)) {
   1.171 +			return NULL;
   1.172 +		}
   1.173 +		return new MemoryIOStream(buffer,length);
   1.174 +	}
   1.175 +
   1.176 +	// -------------------------------------------------------------------
   1.177 +	/** Closes the given file and releases all resources associated with it. */
   1.178 +	void Close( IOStream* /*pFile*/) {
   1.179 +	}
   1.180 +
   1.181 +	// -------------------------------------------------------------------
   1.182 +	/** Compare two paths */
   1.183 +	bool ComparePaths (const char* /*one*/, const char* /*second*/) const {
   1.184 +		return false;
   1.185 +	}
   1.186 +
   1.187 +private:
   1.188 +	const uint8_t* buffer;
   1.189 +	size_t length;
   1.190 +};
   1.191 +} // end namespace Assimp
   1.192 +
   1.193 +#endif