ctr_Repair/trunk/CardSaveData/common/savefile/membak.h

/*---------------------------------------------------------------------------*
  Project:  Horizon
  File:     irp.h

  Copyright (C)2009 Nintendo Co., Ltd.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  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.

  $Rev$
 *---------------------------------------------------------------------------*/

#ifndef MEMBAK_H_
#define MEMBAK_H_

#include <nn/types.h>
#include <nn/Result.h>
#include "../my_defs.h"
#include "savefile.h"
#include <nn/math.h>

//メモリ上の仮想バックアップ容量
//SDK更新でアプリ領域が減る可能性あるので無理しない
#define MEM_BKUP_SIZE 10*1024*1024

class MemBak
{
public:
    s64 FileSize;
    NN_PADDING4;
    nn::Result LastNnResult;
private:
    struct EntryHeader
    {
        s16 nameSize;
        NN_PADDING2;
        s32 dataSize;
        s32 nextOffset;

        EntryHeader* GetNext()
        {
            return reinterpret_cast<EntryHeader*>(
                    reinterpret_cast<bit8*>(this) + nextOffset);
        }
        bit8* GetDataPointer()
        {
            return reinterpret_cast<bit8*>(this + 1) + nameSize;
        }
        const wchar_t* GetName() const
        {
            return reinterpret_cast<const wchar_t*>(
                    reinterpret_cast<const bit8*>(this + 1));
        }
        void SetName(const wchar_t* name)
        {
            s32 len = std::wcslen(name);
            nameSize = len * 2 + 2;
            std::memcpy(this + 1, name, nameSize);
        }
        void SetSize(size_t size)
        {
            dataSize = size;
        }
        s32 GetSize() const
        {
            return dataSize;
        }
        void SetNext()
        {
            nextOffset = nn::math::RoundUp(sizeof(*this) + nameSize + dataSize, 4);
        }
        bool Match(const wchar_t* p)
        {
            return std::wcscmp(p, GetName()) == 0;
        }
        bool IsEnd() const
        {
            return nameSize == 0;
        }
    };
    struct FileState
    {
        EntryHeader*    pE;
        s32 pos;

        void Init(EntryHeader* p)
        {
            pE = p;
            pos = 0;
        }
        void Set(const wchar_t* name, size_t size)
        {
            pE->SetName(name);
            pE->SetSize(size);
            pE->SetNext();
            pE->GetNext()->nameSize = 0;
        }
        s32 GetSize() const { return pE->GetSize(); }
        EntryHeader* GetNext()
        {
            return pE->GetNext();
        }
        bit8* GetCurrentPointer()
        {
            return pE->GetDataPointer() + pos;
        }
        s32 GetRemain() const
        {
            return pE->dataSize - pos;
        }
        void Advance(s32 size)
        {
            pos += size;
        }
        s32 Write(const void* p, size_t size)
        {
            s32 remain = GetRemain();
            if( remain <= 0 )
            {
                return 0;
            }
            
            s32 copySize = nn::math::Min<s32>(remain, size);
            std::memcpy(GetCurrentPointer(), p, copySize);
            Advance(copySize);

            return copySize;
        }
        s32 Read(void* p, size_t size)
        {
            s32 remain = GetRemain();
            if( remain <= 0 )
            {
                return 0;
            }

            s32 copySize = nn::math::Min<s32>(remain, size);
            std::memcpy(p, GetCurrentPointer(), copySize);
            Advance(copySize);

            return copySize;
        }
    };

    tArcInfo    m_ArcInfo;
    FileState   m_ForRead;
    FileState   m_ForWrite;
    
    bool    m_Exists;
    bool    m_IsMounted;
    NN_PADDING2;
    bit8*   m_pBuffer;
    size_t   m_pBufferSize;
    bit8*   m_pBufferPos;
    EntryHeader* m_pFind;

    u32     m_NumDirEntry;
    u32     m_NumFileEntry;

public:
    MemBak();
    ~MemBak();
    void        Finalize();
    myResult    Create(u32 entryDir,u32 entryFile);
//    myResult    CreateSys();
    myResult    Mount();
//    myResult    MountSys();
    bool        IsExist();
    void        Unmount();
    bool        Delete();
    void        CloseW();
    bool        OpenW(wchar_t *path,s64 size);
    bool        OpenSysW();//暫定
    void        CloseSysW();//暫定
//    bool        OpenSysR();//暫定
//    void        CloseSysR();//暫定
    s32         Write(char *buffer,size_t size);
    bool        WriteSys(tArcInfo *pinfo);
//    bool        ReadSys(tArcInfo *pinfo);
    void        ResetPath();
    s32         Read(char *buffer,size_t size);
    void        Close();
    bool        Open(wchar_t *path);
    myResult    GetPath(wchar_t *path);
    bool        GetInfo(tArcInfo *pinfo);
};



#endif