CharBuffer.h

/*
 *  Copyright (C) 2010  Regents of the University of Michigan
 *
 *   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 3 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, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __BUFFER_H__
#define __BUFFER_H__
 
#include <stdint.h>
#include "InputFile.h"
 
class CharBuffer
{
public:
    CharBuffer();
    CharBuffer(int32_t initialSize);
    ~CharBuffer();
 
    // Copy Constructor
    CharBuffer(const CharBuffer& buffer);
 
    // Overload operator = to copy the passed in buffer into this buffer.
    CharBuffer& operator = (const CharBuffer& buffer);
 
    // Overload operator = to copy the passed in buffer into this buffer.
    CharBuffer& operator = (const std::string& stringBuffer);
 
    // Overload operator = to copy the passed in buffer into this buffer.
    bool copy(const CharBuffer& buffer);
 
    void reset();
 
    // Read from a file into the buffer.  length is the amount of data to read.
    // Returns the number of bytes read.
    int readFromFile(IFILE filePtr, int32_t length);
 
    inline const char* c_str() const
    {
        return(myBuffer);
    }
 
    inline int32_t length() const
    {
        return(myBufferLen);
    }
 
private:
    // newLen is the new length for the buffer.
    bool prepareNewLength(int32_t newLen);
 
    int32_t myBufferLen;
    char* myBuffer;
 
    int32_t myBufferAllocatedLen;
 
    static const int32_t DEFAULT_BUFFER_SIZE = 100;
};
 
#endif