Urho3D/Source/ThirdParty/Assimp/code/DefaultIOSystem.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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Copyright (c) 2006-2017, assimp team


All rights reserved.

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* 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
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  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
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  derived from this software without specific prior
  written permission of the assimp team.

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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/
/** @file Default implementation of IOSystem using the standard C file functions */

#include "StringComparison.h"

#include <assimp/DefaultIOSystem.h>
#include <assimp/DefaultIOStream.h>
#include <assimp/DefaultLogger.hpp>
#include <assimp/ai_assert.h>
#include <stdlib.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;
#if defined( _MSC_VER ) || defined( __MINGW32__ )
    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);
}

// ------------------------------------------------------------------------------------------------
std::string DefaultIOSystem::fileName( const std::string &path )
{
    std::string ret = path;
    std::size_t last = ret.find_last_of("\\/");
    if (last != std::string::npos) ret = ret.substr(last + 1);
    return ret;
}

// ------------------------------------------------------------------------------------------------
std::string DefaultIOSystem::completeBaseName( const std::string &path )
{
    std::string ret = fileName(path);
    std::size_t pos = ret.find_last_of('.');
    if(pos != ret.npos) ret = ret.substr(0, pos);
    return ret;
}

// ------------------------------------------------------------------------------------------------
std::string DefaultIOSystem::absolutePath( const std::string &path )
{
    std::string ret = path;
    std::size_t last = ret.find_last_of("\\/");
    if (last != std::string::npos) ret = ret.substr(0, last);
    return ret;
}

// ------------------------------------------------------------------------------------------------

#undef PATHLIMIT