CharBufferByteSink.h

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/*                                              -*- mode:C++ -*-
  CharBufferByteSink.h Character based ByteSink
  Copyright (C) 2014 The Regents of the University of New Mexico.  All rights reserved.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

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

#ifndef CHARBUFFERBYTESINK_H
#define CHARBUFFERBYTESINK_H

#include "ByteSink.h"
#include <string.h>        /* For memcpy */

namespace MFM
{
  template <int BUFSIZE>
  class CharBufferByteSink : public ByteSink
  {
  public:

    CharBufferByteSink() :
      m_written(0)
      { }

    virtual void WriteBytes(const u8 * data, const u32 len)
    {
      if (m_written + len < BUFSIZE-1)
      {
        memcpy(&m_buf[m_written], data, len);
        m_written += len;
        return;
      }
      FAIL(OUT_OF_ROOM);
    }

    virtual s32 CanWrite()
    {
      return BUFSIZE - m_written - 1;
    }

    bool Equals(const char * str)
    {
      return strcmp(GetZString(), str)==0;
    }

    const char * GetZString()
    {
      m_buf[m_written] = '\0';
      return (const char *) m_buf;
    }

    u32 GetLength() const
    {
      return m_written;
    }

    u32 GetCapacity() const
    {
      return BUFSIZE;
    }

    void Reset()
    {
      m_written = 0;
    }

  private:
    u8 m_buf[BUFSIZE];

    u32 m_written;
  };
}

#endif /* CHARBUFFERBYTESINK_H */