/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     SmFile.h
  
  Copyright (C)2009-2011 Nintendo/HAL Laboratory, Inc.  All rights reserved.
  
  These coded instructions, statements, and computer programs contain proprietary
  information of Nintendo and/or its licensed developers and are protected by
  national and international copyright laws. They may not be disclosed to third
  parties or copied or duplicated in any form, in whole or in part, without the
  prior written consent of Nintendo.
  
  The content herein is highly confidential and should be handled accordingly.
  
  $Revision: $
 *---------------------------------------------------------------------------*/
#ifndef SM_FILE_H_
#define SM_FILE_H_

#include <nn/fs.h>
#include "../include/SmBase.h"


//------------------------------------------------------------------------------
// ファイルの読み込みを行うクラスです。
class SmFile
{
public:
    // コンストラクタ
    SmFile( bool autoFree = false )
    : m_Buffer(NULL), 
      m_Size(0),
      m_AutoFree( autoFree ),
      m_Allocator( NULL ){}

    // デストラクタ
    ~SmFile()
    {
         if ( m_AutoFree )
        {
            Release();
        }
    }

    // 指定されたファイルを読み込みます。
    bool Read( const wchar_t* fileName, nw::os::IAllocator* allocator )
    {
        NW_ASSERT(m_Buffer == NULL);
        NW_NULL_ASSERT( allocator );

        m_Allocator = allocator;

        nn::fs::FileReader fileReader(fileName);
        if (fileReader.GetSize() <= 0)
        {
            return false;
        }

        this->m_Size = static_cast<u32>(fileReader.GetSize());
        this->m_Buffer = static_cast<u8*>(m_Allocator->Alloc(this->m_Size, 128));
        if (this->m_Buffer == NULL)
        {
            this->m_Size = 0;
            return false;
        }

        fileReader.Read(this->m_Buffer, this->m_Size);
        fileReader.Finalize();

        return true;
    }

    // 読み込んだファイルのバッファを取得します。
    u8* Buffer()
    {
        return this->m_Buffer;
    }

    // 読み込んだファイルのサイズを取得します。
    u32 Size()
    {
        return this->m_Size;
    }

    // 確保したメモリを解放します
    void Release()
    {
         if ( m_Buffer )
        {
            m_Allocator->Free( m_Buffer );
            m_Buffer = NULL;
        }
    }

private:
    u8*                     m_Buffer;
    u32                     m_Size;
    bool                    m_AutoFree;
    nw::os::IAllocator*     m_Allocator;
};


#endif  // SM_FILE_H_