Building a Programing Language – Part I (Creating BrainLess)

#ifndef __BRAINLESS_HELPER__
#define __BRAINLESS_HELPER__
/*
Author : Shakti Misra
All are welcome to use these files, distribute, modify and release. But This notice should be included.
*/
#include <stdio.h>
#include <string>
using namespace std;

#define DIM( a ) (sizeof(a)/sizeof(a[0]))

class FileRead
{
private:
    int m_iCount;
    int m_iIndex;
    char m_szBuffer[101];
    const string m_sFileName;
    FILE* m_pFile;
    char m_cCurChar;
    bool m_bEOFReached;

private:
    char getNextCharInternal();

public:
    FileRead(string sFileName):
          m_sFileName(sFileName),
          m_iCount(0),
          m_iIndex(-1),
          m_cCurChar(0x0),
          m_bEOFReached(false)
    {
        if(false == m_sFileName.empty())
        {
            m_pFile = fopen(m_sFileName.c_str(), "rb");
        }

        memset(m_szBuffer, 0x0, DIM(m_szBuffer));
    }

    ~FileRead()
    {
        if(NULL != m_pFile)
        {
            fclose(m_pFile);
            m_pFile = NULL;
        }
    }

    char getNextChar()
    {
        return getNextCharInternal();
    }

    char getCurrentChar(){return m_cCurChar;}

    int getNextNumber();
    bool unreadChar(const char);

    bool isEOF(){return m_bEOFReached;}
};

#endif //__BRAINLESS_HELPER__