ResourceFile.h

// sktoolslib - common files for SK tools

// Copyright (C) 2012, 2020 - Stefan Kueng

// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//

#pragma once

class CResourceFile
{
public:
    CResourceFile();
    CResourceFile(const CResourceFile &);
    virtual ~CResourceFile();

    BYTE * GetByteBuffer() { return m_pBytes; }
    size_t GetLength() { return m_nBufLen; }
    size_t GetPosition() { return m_nPosition; }
    BOOL   IsAtEOF() { return m_nPosition >= GetLength(); }
    BOOL   IsOpen() { return m_bIsOpen; }

public:
    virtual void   Close();
    virtual BYTE * DetachByteBuffer();
    virtual BYTE * DuplicateByteBuffer();
    virtual BOOL   Open(HINSTANCE hInstance,
                        LPCWSTR   lpszResId,
                        LPCWSTR   lpszResType);
    virtual size_t Read(BYTE *buf, size_t nBufLen);
    virtual size_t Seek(size_t offset, size_t origin);
    virtual size_t SeekToBegin();
    virtual size_t SeekToEnd();
    virtual void   SetByteBuffer(BYTE *buf, DWORD len);

protected:
    BYTE * m_pBytes;           // binary buffer
    size_t m_nBufLen;          // size of m_pszResource: TCHARs for text,
                               // bytes for binary
    size_t m_nPosition;        // buffer position: TCHARs for text,
                               // bytes for binary
    BOOL m_bText;              // TRUE = text, FALSE = binary
    BOOL m_bIsOpen;            // TRUE = text file resource is open
    BOOL m_bDoNotDeleteBuffer; // TRUE = buffer allocated externally
                               // or detached; do not delete
};