// Copyright (C) 2002-2005 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine" and the "irrXML" project.
// For conditions of distribution and use, see copyright notice in irrlicht.h and/or irrXML.h

// Need to include Assimp, too. We're using Assimp's version of fast_atof
// so we need stdint.h. But no PCH.

#include "./../../code/AssimpPCH.h"

#include "irrXML.h"
#include "irrString.h"
#include "irrArray.h"
#include "./../../code/fast_atof.h"
#include "CXMLReaderImpl.h"

namespace irr
{
namespace io
{

//! Implementation of the file read callback for ordinary files
class CFileReadCallBack : public IFileReadCallBack
{
public:

    //! construct from filename
    CFileReadCallBack(const char* filename)
        : File(0), Size(0), Close(true)
    {
        // open file
        File = fopen(filename, "rb");

        if (File)
            getFileSize();
    }

    //! construct from FILE pointer
    CFileReadCallBack(FILE* file)
        : File(file), Size(0), Close(false)
    {
        if (File)
            getFileSize();
    }

    //! destructor
    virtual ~CFileReadCallBack()
    {
        if (Close && File)
            fclose(File);
    }

    //! Reads an amount of bytes from the file.
    virtual int read(void* buffer, int sizeToRead)
    {
        if (!File)
            return 0;

        return (int)fread(buffer, 1, sizeToRead, File);
    }

    //! Returns size of file in bytes
    virtual int getSize()
    {
        return Size;
    }

private:

    //! retrieves the file size of the open file
    void getFileSize()
    {
        fseek(File, 0, SEEK_END);
        Size = ftell(File);
        fseek(File, 0, SEEK_SET);
    }

    FILE* File;
    int Size;
    bool Close;

}; // end class CFileReadCallBack



// FACTORY FUNCTIONS:


//! Creates an instance of an UFT-8 or ASCII character xml parser.
IrrXMLReader* createIrrXMLReader(const char* filename)
{
    return new CXMLReaderImpl<char, IXMLBase>(new CFileReadCallBack(filename));
}


//! Creates an instance of an UFT-8 or ASCII character xml parser.
IrrXMLReader* createIrrXMLReader(FILE* file)
{
    return new CXMLReaderImpl<char, IXMLBase>(new CFileReadCallBack(file));
}


//! Creates an instance of an UFT-8 or ASCII character xml parser.
IrrXMLReader* createIrrXMLReader(IFileReadCallBack* callback)
{
    return new CXMLReaderImpl<char, IXMLBase>(callback, false);
}


//! Creates an instance of an UTF-16 xml parser.
IrrXMLReaderUTF16* createIrrXMLReaderUTF16(const char* filename)
{
    return new CXMLReaderImpl<char16, IXMLBase>(new CFileReadCallBack(filename));
}


//! Creates an instance of an UTF-16 xml parser.
IrrXMLReaderUTF16* createIrrXMLReaderUTF16(FILE* file)
{
    return new CXMLReaderImpl<char16, IXMLBase>(new CFileReadCallBack(file));
}


//! Creates an instance of an UTF-16 xml parser.
IrrXMLReaderUTF16* createIrrXMLReaderUTF16(IFileReadCallBack* callback)
{
    return new CXMLReaderImpl<char16, IXMLBase>(callback, false);
}


//! Creates an instance of an UTF-32 xml parser.
IrrXMLReaderUTF32* createIrrXMLReaderUTF32(const char* filename)
{
    return new CXMLReaderImpl<char32, IXMLBase>(new CFileReadCallBack(filename));
}


//! Creates an instance of an UTF-32 xml parser.
IrrXMLReaderUTF32* createIrrXMLReaderUTF32(FILE* file)
{
    return new CXMLReaderImpl<char32, IXMLBase>(new CFileReadCallBack(file));
}


//! Creates an instance of an UTF-32 xml parser.
IrrXMLReaderUTF32* createIrrXMLReaderUTF32(IFileReadCallBack* callback)
{
    return new CXMLReaderImpl<char32, IXMLBase>(callback, false);
}


} // end namespace io
} // end namespace irr
