text: /*
  ---------------------------------------------------------------------------
  Open Asset Import Library (ASSIMP)
  ---------------------------------------------------------------------------
  
  Copyright (c) 2006-2010, ASSIMP Development Team
  
  All rights reserved.
  
  Redistribution and use of this software in source and binary forms, 
  with or without modification, are permitted provided that the following 
  conditions are met:
  
  * Redistributions of source code must retain the above
    copyright notice, this list of conditions and the
    following disclaimer.
  
  * Redistributions in binary form must reproduce the above
    copyright notice, this list of conditions and the
    following disclaimer in the documentation and/or other
    materials provided with the distribution.
  
  * Neither the name of the ASSIMP team, nor the names of its
    contributors may be used to endorse or promote products
    derived from this software without specific prior
    written permission of the ASSIMP Development Team.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  ---------------------------------------------------------------------------
  */
  /** @file Default implementation of IOSystem using the standard C file functions */
  
  #include "AssimpPCH.h"
  
  #include <stdlib.h>
  #include "DefaultIOSystem.h"
  #include "DefaultIOStream.h"
  
  #ifdef __unix__
  #include <sys/param.h>
  #include <stdlib.h>
  #endif
  
  using namespace Assimp;
  
  // ------------------------------------------------------------------------------------------------
  // Constructor. 
  DefaultIOSystem::DefaultIOSystem()
  {
  	// nothing to do here
  }
  
  // ------------------------------------------------------------------------------------------------
  // Destructor. 
  DefaultIOSystem::~DefaultIOSystem()
  {
  	// nothing to do here
  }
  
  // ------------------------------------------------------------------------------------------------
  // Tests for the existence of a file at the given path.
  bool DefaultIOSystem::Exists( const char* pFile) const
  {
  	FILE* file = ::fopen( pFile, "rb");
  	if( !file)
  		return false;
  
  	::fclose( file);
  	return true;
  }
  
  // ------------------------------------------------------------------------------------------------
  // Open a new file with a given path.
  IOStream* DefaultIOSystem::Open( const char* strFile, const char* strMode)
  {
  	ai_assert(NULL != strFile);
  	ai_assert(NULL != strMode);
  
  	FILE* file = ::fopen( strFile, strMode);
  	if( NULL == file) 
  		return NULL;
  
  	return new DefaultIOStream(file, (std::string) strFile);
  }
  
  // ------------------------------------------------------------------------------------------------
  // Closes the given file and releases all resources associated with it.
  void DefaultIOSystem::Close( IOStream* pFile)
  {
  	delete pFile;
  }
  
  // ------------------------------------------------------------------------------------------------
  // Returns the operation specific directory separator
  char DefaultIOSystem::getOsSeparator() const
  {
  #ifndef _WIN32
  	return '/';
  #else
  	return '\\';
  #endif
  }
  
  // ------------------------------------------------------------------------------------------------
  // IOSystem default implementation (ComparePaths isn't a pure virtual function)
  bool IOSystem::ComparePaths (const char* one, const char* second) const
  {
  	return !ASSIMP_stricmp(one,second);
  }
  
  // maximum path length
  // XXX http://insanecoding.blogspot.com/2007/11/pathmax-simply-isnt.html 
  #ifdef PATH_MAX
  #	define PATHLIMIT PATH_MAX
  #else
  #	define PATHLIMIT 4096
  #endif
  
  // ------------------------------------------------------------------------------------------------
  // Convert a relative path into an absolute path
  inline void MakeAbsolutePath (const char* in, char* _out)
  {
  	ai_assert(in && _out);
  	char* ret;
  #ifdef _WIN32
  	ret = ::_fullpath(_out, in,PATHLIMIT);
  #else
      	// use realpath
      	ret = realpath(in, _out);
  #endif  
  	if(!ret) {
  		// preserve the input path, maybe someone else is able to fix
  		// the path before it is accessed (e.g. our file system filter)
  		DefaultLogger::get()->warn("Invalid path: "+std::string(in));
  		strcpy(_out,in);
  	}  
  }
  
  // ------------------------------------------------------------------------------------------------
  // DefaultIOSystem's more specialized implementation
  bool DefaultIOSystem::ComparePaths (const char* one, const char* second) const
  {
  	// chances are quite good both paths are formatted identically,
  	// so we can hopefully return here already
  	if( !ASSIMP_stricmp(one,second) )
  		return true;
  
  	char temp1[PATHLIMIT];
  	char temp2[PATHLIMIT];
  	
  	MakeAbsolutePath (one, temp1);
  	MakeAbsolutePath (second, temp2);
  
  	return !ASSIMP_stricmp(temp1,temp2);
  }
  
  #undef PATHLIMIT
  