scfx_string.h

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  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
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/*****************************************************************************

  scfx_string.h - 

  Original Author: Robert Graulich, Synopsys, Inc.
                   Martin Janssen,  Synopsys, Inc.

 *****************************************************************************/

/*****************************************************************************

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date:
  Description of Modification:

 *****************************************************************************/
// $Log: scfx_string.h,v $
// Revision 1.1.1.1  2006/12/15 20:20:04  acg
// SystemC 2.3
//
// Revision 1.2  2006/01/03 23:18:34  acg
// Changed copyright to include 2006.
//
// Revision 1.1.1.1  2005/12/19 23:16:43  acg
// First check in of SystemC 2.1 into its own archive.
//
// Revision 1.9  2005/09/15 23:02:03  acg
// Added std:: prefix to appropriate methods and types to get around
// issues with the Edison Front End.
//
// Revision 1.8  2005/06/07 17:27:02  acg
// Fixed bug in scfx_string::operator += where an array reference was used
// rather than the [] operator.  This meant that the buffer may have been
// accessed beyond its allocated storage.
//

#ifndef SCFX_STRING_H
#define SCFX_STRING_H

#include <cstdio>


namespace sc_dt
{

// classes defined in this module
class scfx_string;


class SC_API scfx_string
{
    void resize( std::size_t );

public:

    scfx_string();

    ~scfx_string();

    int length() const;

    void clear();

    char& operator [] ( int );

    void append( int );
    void discard( int );
    void remove( int );

    void operator += ( char );
    void operator += ( const char* );

    operator const char* ();

private:

    std::size_t m_len;
    std::size_t m_alloc;
    char*  m_buffer;
};


// IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

inline
void
scfx_string::resize( std::size_t i )
{
    do {
        m_alloc *= 2;
    } while( i >= m_alloc );

    char* temp = new char[m_alloc];

    for( int j = 0; j < (int) m_len; ++ j ) {
        temp[j] = m_buffer[j];
    }
    temp[m_len] = 0;

    delete [] m_buffer;
    m_buffer = temp;
}


inline
scfx_string::scfx_string()
: m_len( 0 ), m_alloc( BUFSIZ ), m_buffer( new char[m_alloc] )
{
    m_buffer[m_len] = 0;
}


inline
scfx_string::~scfx_string()
{
    delete [] m_buffer;
}


inline
int
scfx_string::length() const
{
    return m_len;
}


inline
void
scfx_string::clear()
{
    m_len = 0;
    m_buffer[m_len] = 0;
}


inline
char&
scfx_string::operator [] ( int i )
{
    if( i >= (int) m_alloc ) {
        resize( i );
    }
    return m_buffer[i];
}


inline
void
scfx_string::append( int n )
{
    m_len += n;
    m_buffer[m_len] = 0;
}

inline
void
scfx_string::discard( int n )
{
    m_len -= n;
    m_buffer[m_len] = 0;
}

inline
void
scfx_string::remove( int i )
{
    for( int j = i + 1; j < (int) m_len; ++ j )
        m_buffer[j - 1] = m_buffer[j];
    -- m_len;
    m_buffer[m_len] = 0;
}


inline
void
scfx_string::operator += ( char c )
{
    this->operator [] ( m_len ) = c;
    m_len ++;
    this->operator [] ( m_len ) = 0;
}

inline
void
scfx_string::operator += ( const char* s )
{
    while( *s )
        (*this) += *s ++;
}


inline
scfx_string::operator const char*()
{
    m_buffer[m_len] = 0;
    return m_buffer;
}

} // namespace sc_dt


#endif

// Taf!