OBJParser.hpp

/*
 * Copyright 2016 Steven T Sell (ssell@vertexfragment.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __H__OBJ_PARSER__H__
#define __H__OBJ_PARSER__H__

#include "OBJState.hpp"

//------------------------------------------------------------------------------------------
// Optional Defines
//------------------------------------------------------------------------------------------

// If defined, the parser will use boost memory mapped files for loading files.
// This may drastically speed up file I/O but requires IOStream library dependency.

//#define OBJ_PARSER_USE_MEM_MAP

//------------------------------------------------------------------------------------------
// OBJ Parser
//------------------------------------------------------------------------------------------

class OBJParser
{
public:

    enum class Result
    {
        Success = 0,              
        FailedOBJFileRead,        
        FailedOBJParseError,      
        FailedMTLFileRead,        
        FailedMTLParseError       
    };

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

    OBJParser();
    ~OBJParser();

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

    Result parseOBJFile(std::string const& path);

    OBJState* getOBJState();

    std::string const& getLastError() const;

protected:

    Result parseOBJFilefstream(std::string const& path);
    Result parseOBJFileMemMap(std::string const& path);
   
    Result parseMTLFilefstream(std::string const& path);
    Result parseMTLFileMemMap(std::string const& path);

    std::string buildRelativeMTLPath(std::string const& objPath, std::string const& mtlPath);

    std::string extractLastLine(const char* str);
    std::string extractLastLine(std::ifstream& stream);

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

    OBJState m_OBJState;          

    std::string m_LastError;      

private:
};

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

#endif