///////////////////////////////////////////////////////////////////////////
// FILE: string (Definition of character traits and std::string)
//
//                          Open Watcom Project
//
// Copyright (c) 2004-2008 The Open Watcom Contributors. All Rights Reserved.
//
//    This file is automatically generated. Do not edit directly.
//
// =========================================================================
//
// Description: This header is part of the C++ standard library. It
//              defines the character traits template and the std::
//              basic_string template.
///////////////////////////////////////////////////////////////////////////
#ifndef _STRING_INCLUDED
#define _STRING_INCLUDED
#if !defined(_ENABLE_AUTODEPEND)
  #pragma read_only_file;
#endif


#ifndef __cplusplus
#error The header string requires C++
#endif

#ifndef _CCTYPE_INCLUDED
  #include <cctype>
#endif

#ifndef _STDEXCEPT_INCLUDED
  #include <stdexcep>
#endif

namespace _watcom {

  // ============================================================
  // Character traits specialization for case insensitive strings
  // ============================================================

  struct ichar_traits : std::char_traits< char > {

    // Use tolower for compatibility with _memicmp.
    static bool eq( const char_type &c1, const char_type &c2 )
      { return( std::tolower( c1 ) == std::tolower( c2 ) ); }

    static bool lt( const char_type &c1, const char_type &c2 )
      { return( std::tolower( c1 ) < std::tolower( c2 ) ); }

    static int compare( const char_type *s1, const char_type *s2, size_t n )
      { return( _memicmp( s1, s2, n ) ); }

    // Too bad there's no _memichr.
    static const char_type *find( const char_type *s, size_t n, const char_type &a )
    {
      const char_type *result = 0;
      for( size_t i = 0; i < n; ++i ) {
        if( std::tolower( *s ) == std::tolower( a ) ) {
          result = s;
          break;
        }
        ++s;
      }
      return( result );
    }

    static bool eq_int_type( const int_type &c1, const int_type &c2 )
      { return( std::tolower( c1 ) == std::tolower( c2 ) ); }

  };
  typedef std::basic_string< char, ichar_traits > istring;
}
namespace watcom = _watcom;

namespace std {

  // ================================
  // Member functions of basic_string
  // ================================

  // basic_string( const basic_string &, size_type, size_type, ... )
  // ***************************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >::basic_string(
    const basic_string &other,
    size_type  pos,
    size_type  n,
    const Allocator &a ) : mem( a )
  {
    if( pos > other.str_length )
      throw out_of_range( "basic_string::basic_string" );

    size_type tail_length = other.str_length - pos;
    size_type result_length = ( tail_length <= n ) ? tail_length : n;

    buffer = alloc( result_length + 1, buf_length );
    Traits::copy( buffer, other.buffer + pos, result_length );
    str_length = result_length;
  }

  // basic_string( const CharT *, size_type, const Allocator & )
  // ***********************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >::basic_string(
    const CharT     *s,
    size_type        n,
    const Allocator &a ) : mem( a )
  {
    if( n > max_size( ) )
      throw length_error( "basic_string::basic_string" );

    buffer = alloc( n + 1, buf_length );
    Traits::copy( buffer, s, n );
    str_length = n;
  }

  // basic_string( size_type, CharT, const Allocator & )
  // ***************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >::basic_string(
          size_type  n,
          CharT      c,
    const Allocator &a ) : mem( a )
  {
    if( n > max_size( ) )
      throw length_error( "basic_string::basic_string" );

    buffer = alloc( n + 1, buf_length );
    Traits::assign( buffer, n, c );
    str_length = n;
  }

  // operator=( const CharT * )
  // **************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::operator=(
      const CharT *s )
  {
    size_type other_length = Traits::length( s );

    if( buf_length > other_length ) {
      Traits::copy( buffer, s, other_length );
      str_length = other_length;
    }
    else {
      replace_buffer( s, other_length );
    }
    return( *this );
  }

  // operator=( CharT )
  // ******************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::operator=(
      CharT c )
  {
    Traits::assign( *buffer, c );
    str_length = 1;
    return( *this );
  }

  // assign( const basic_string &, size_type, size_type )
  // ****************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::assign(
      const basic_string &str,
      size_type pos,
      size_type n )
  {
    basic_string temp( str, pos, n, mem );
    swap( temp );
    return( *this );
  }

  // assign( const CharT *, size_type )
  // **********************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::assign(
      const CharT *s,
      size_type n )
  {
    basic_string temp( s, n, mem );
    swap( temp );
    return( *this );
  }

  // assign( const CharT * )
  // ***********************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::assign(
      const CharT *s )
  {
    basic_string temp( s, mem );
    swap( temp );
    return( *this );
  }

  // assign( size_type, CharT )
  // **************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::assign(
      size_type n,
      CharT c )
  {
    basic_string temp( n, c, mem );
    swap( temp );
    return( *this );
  }

  // resize( size_type, CharT )
  // **************************
  template< class CharT, class Traits, class Allocator >
  void basic_string< CharT, Traits, Allocator >::resize(
    size_type n,
    CharT c )
  {
    if( n <= str_length ) {
      str_length = n;
      return;
    }

    if( n < buf_length ) {
      Traits::assign( buffer + str_length, n - str_length, c );
      str_length = n;
      return;
    }

    size_type new_length;
    pointer new_buffer = alloc( n + 1, new_length );
    Traits::copy( new_buffer, buffer, str_length );
    Traits::assign( new_buffer + str_length, n - str_length, c );
    mem.deallocate( buffer, buf_length );
    buffer = new_buffer;
    buf_length = new_length;
    str_length = n;
  }

  // reserve( size_type )
  // ********************
  template< class CharT, class Traits, class Allocator >
  void basic_string< CharT, Traits, Allocator >::reserve(
    size_type new_capacity )
  {
    if( new_capacity < buf_length ) return;

    size_type new_length;
    pointer new_buffer = alloc( new_capacity + 1, new_length );
    Traits::copy( new_buffer, buffer, str_length );
    mem.deallocate( buffer, buf_length );
    buffer = new_buffer;
    buf_length  = new_length;
  }

  // at( size_type ) const
  // *********************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::const_reference
    basic_string< CharT, Traits, Allocator >::at( size_type pos ) const
  {
    if( pos >= str_length )
      throw out_of_range( "basic_string::at" );

    return( buffer[pos] );
  }

  // at( size_type )
  // ***************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::reference
    basic_string< CharT, Traits, Allocator >::at( size_type pos )
  {
    if( pos >= str_length )
      throw out_of_range( "basic_string::at" );

    return( buffer[pos] );
  }

  // operator+=( const basic_string & )
  // **********************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::operator+=(
      const basic_string &str )
  {
    return( append( str ) );
  }

  // operator+=( const CharT * )
  // ***************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::operator+=( const CharT *s )
  {
    return( append( s ) );
  }

  // operator+=( CharT )
  // *******************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::operator+=( CharT c )
  {
    return( append( 1, c ) );
  }

  // append( const basic_string &, size_type, size_type )
  // ****************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::append(
      const basic_string &str,
      size_type pos,
      size_type n )
  {
    if( pos > str.str_length )
      throw out_of_range( "basic_string::append" );

    size_type tail_length = str.str_length - pos;
    size_type append_length = ( tail_length <= n ) ? tail_length : n;

    return( append( str.buffer + pos, append_length ) );
  }

  // append( const CharT *, size_type )
  // **********************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::append(
      const CharT *s,
      size_type n )
  {
    if( str_length > max_size( ) - n )
      throw length_error( "basic_string::append" );

    if( n < buf_length - str_length ) {
      Traits::copy( buffer + str_length, s, n );
      str_length += n;
    }
    else {
      // Prepare new buffer.
      size_type result_length = str_length + n;
      size_type new_length;
      pointer new_buffer = alloc( result_length + 1, new_length );
      Traits::copy( new_buffer, buffer, str_length );
      Traits::copy( new_buffer + str_length, s, n );

      // Commit.
      mem.deallocate( buffer, buf_length );
      buffer = new_buffer;
      buf_length = new_length;
      str_length = result_length;
    }

    return( *this );
  }

  // append( const CharT * )
  // ***********************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::append( const CharT *s )
  {
    return( append( s, Traits::length( s ) ) );
  }

  // append( size_type, CharT )
  // **************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::append( size_type n, CharT c )
  {
    return( append( basic_string( n, c ) ) );
  }

  // push_back( CharT )
  // ******************
  template< class CharT, class Traits, class Allocator >
  inline
  void basic_string< CharT, Traits, Allocator >::push_back( CharT c )
  {
    append( &c, 1 );
  }

  // insert( size_type, const basic_string &, size_type, size_type )
  // ***************************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::insert(
      size_type pos1,
      const basic_string &str,
      size_type pos2,
      size_type n )
  {
    if( pos2 > str.str_length )
      throw out_of_range( "basic_string::insert" );

    size_type tail_length = str.str_length - pos2;
    size_type insert_length = ( tail_length <= n ) ? tail_length : n;

    return( insert( pos1, str.buffer + pos2, insert_length ) );
  }

  // insert( size_type, const CharT *, size_type )
  // *********************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::insert(
      size_type pos,
      const CharT *s,
      size_type n )
  {
    if( pos > str_length )
      throw out_of_range( "basic_string::insert" );

    if( str_length > max_size( ) - n )
      throw length_error( "basic_string::insert" );

    if( n < buf_length - str_length ) {
      Traits::move( buffer + pos + n, buffer + pos, str_length - pos );
      Traits::copy( buffer + pos, s, n );
      str_length += n;
    }
    else {
      // Prepare new buffer.
      size_type result_length = str_length + n;
      size_type new_length;
      pointer new_buffer = alloc( result_length + 1, new_length );
      Traits::copy( new_buffer, buffer, pos );
      Traits::copy( new_buffer + pos, s, n );
      Traits::copy( new_buffer + pos + n, buffer + pos, str_length - pos );

      // Commit.
      mem.deallocate( buffer, buf_length );
      buffer = new_buffer;
      buf_length = new_length;
      str_length = result_length;
    }
    return( *this );
  }

  // insert( size_type const CharT * )
  // *********************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::insert(
      size_type pos,
      const CharT *s )
  {
    return( insert( pos, basic_string( s ) ) );
  }


  // insert( size_type size_type CharT )
  // ***********************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::insert(
      size_type pos,
      size_type n,
      CharT c )
  {
    return( insert( pos, basic_string( n, c ) ) );
  }

  // insert_helper( iterator, size_type, CharT )
  // *******************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::iterator
    basic_string< CharT, Traits, Allocator >::insert_helper(
      iterator p,
      size_type n,
      CharT c )
  {
    size_type insert_length = n;
    size_type pos = p - buffer;

    if( str_length > max_size( ) - insert_length )
      throw length_error( "basic_string::insert" );

    if( insert_length < buf_length - str_length ) {
      Traits::move(
        buffer + pos + insert_length, buffer + pos, str_length - pos );
      Traits::assign( buffer + pos, insert_length, c );
      str_length += insert_length;
    }
    else {
      // Prepare new buffer.
      size_type result_length = str_length + insert_length;
      size_type new_length;
      pointer new_buffer = alloc( result_length + 1, new_length );
      Traits::copy( new_buffer, buffer, pos );
      Traits::assign( new_buffer + pos, insert_length, c );
      Traits::copy(
        new_buffer + pos + insert_length, buffer + pos, str_length - pos );

      // Commit.
      mem.deallocate( buffer, buf_length );
      buffer = new_buffer;
      buf_length = new_length;
      str_length = result_length;
      p = buffer + pos;
    }
    return( p );
  }

  // insert( iterator, CharT )
  // *************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::iterator
    basic_string< CharT, Traits, Allocator >::insert( iterator p, CharT c )
  {
    return( insert_helper( p, 1, c ) );
  }

  // insert( iterator, size_type, CharT )
  // ************************************
  template< class CharT, class Traits, class Allocator >
  inline
  void basic_string< CharT, Traits, Allocator >::insert(
    iterator p,
    size_type n,
    CharT c )
  {
    insert_helper( p, n, c );
  }

  // erase( size_type, size_type )
  // *****************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::erase(
      size_type pos,
      size_type n )
  {
    if( pos > str_length )
      throw out_of_range( "basic_string::erase" );

    size_type tail_length = str_length - pos;
    size_type erase_length = ( n <= tail_length ) ? n : tail_length;
    Traits::move( buffer + pos, buffer + pos + n, tail_length - erase_length );
    str_length -= erase_length;
    return( *this );
  }

  // erase( iterator )
  // *****************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::iterator
    basic_string< CharT, Traits, Allocator >::erase( iterator p )
  {
    erase( p - begin(), 1 );
    return( p );
  }

  // erase( iterator, iterator )
  // ***************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::iterator
    basic_string< CharT, Traits, Allocator >::erase(
      iterator first,
      iterator last )
  {
    erase( first - begin(), last - first);
    return( first );
  }

  // replace( size_type, size_type, const basic_string & )
  // *****************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      size_type pos1,
      size_type n,
      const basic_string &str )
  {
    return( replace( pos1, n, str, 0, npos ) );
  }

  // replace( size_type, size_type, const basic_string &, size_type, size_type)
  // **************************************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      size_type pos1,
      size_type n1,
      const basic_string &str,
      size_type pos2,
      size_type n2 )
  {
    if( pos2 > str.str_length )
      throw out_of_range( "basic_string::replace" );

    size_type tail_length = str.str_length - pos2;
    size_type insert_length = (n2 <= tail_length) ? n2 : tail_length;

    return( replace( pos1, n1, str.buffer + pos2, insert_length ) );
  }

  // replace( size_type, size_type, const CharT *, size_type )
  // *********************************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      size_type pos,
      size_type n1,
      const CharT *s,
      size_type n2 )
  {
    if( pos > str_length )
      throw out_of_range( "basic_string::replace" );

    size_type tail_length = str_length - pos;
    size_type remove_length = (n1 <= tail_length) ? n1 : tail_length;

    if( str_length - remove_length > max_size( ) - n2 )
      throw length_error( "basic_string::replace" );

    size_type result_length = str_length - remove_length + n2;
    if( buf_length > result_length ) {
      Traits::move( buffer + pos + n2,
                    buffer + pos + remove_length,
                    str_length - pos - remove_length );
      Traits::copy( buffer + pos, s, n2 );
      str_length = result_length;
    }
    else {
      // Prepare new buffer.
      size_type new_length;
      pointer new_buffer = alloc( result_length + 1, new_length );
      Traits::copy( new_buffer, buffer, pos );
      Traits::copy( new_buffer + pos, s, n2 );
      Traits::copy( new_buffer + pos + n2,
                    buffer + pos + remove_length,
                    str_length - pos - remove_length );

      // Commit.
      mem.deallocate( buffer, buf_length );
      buffer = new_buffer;
      buf_length = new_length;
      str_length = result_length;
    }

    return( *this );
  }

  // replace( size_type, size_type, const CharT * )
  // **********************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      size_type pos,
      size_type n1,
      const CharT *s )
  {
    return( replace( pos, n1, s, Traits::length( s ) ) );
  }

  // replace( size_type, size_type, size_type, CharT )
  // *************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      size_type pos,
      size_type n1,
      size_type n2,
      CharT c )
  {
    return( replace( pos, n1, basic_string( n2, c ) ) );
  }

  // replace( iterator, iterator, const basic_string & )
  // ***************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      iterator i1,
      iterator i2,
      const basic_string &str )
  {
    return( replace( i1, i2, str.buffer, str.str_length ) );
  }

  // replace( iterator, iterator, const CharT *s, size_type n )
  // **********************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      iterator i1,
      iterator i2,
      const CharT *s,
      size_type n )
  {
    size_type pos           = &*i1 - buffer;
    size_type remove_length = &*i2 - &*i1;

    return( replace( pos, remove_length, s, n ) );
  }

  // replace( iterator i1, iterator i2, const CharT * )
  // **************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      iterator i1,
      iterator i2,
      const CharT *s )
  {
    return( replace( i1, i2, s, Traits::length( s ) ) );
  }

  // replace( iterator i1, iterator i2, size_type n, CharT c )
  // *********************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  basic_string< CharT, Traits, Allocator > &
    basic_string< CharT, Traits, Allocator >::replace(
      iterator i1,
      iterator i2,
      size_type n,
      CharT c )
  {
    return( replace( i1, i2, basic_string( n, c ) ) );
  }

  // copy( CharT *, size_type, size_type )
  // *************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::copy(
      CharT    *s,
      size_type n,
      size_type pos ) const
  {
    if( pos > str_length )
      throw out_of_range( "basic_string::copy" );

    size_type tail_length = str_length - pos;
    size_type copy_length = (n <= tail_length) ? n : tail_length;
    Traits::copy( s, buffer + pos, copy_length );
    return( copy_length );
  }

  // swap( basic_string & )
  // **********************
  template< class CharT, class Traits, class Allocator >
  void basic_string< CharT, Traits, Allocator >::swap(
    basic_string &str )
  {
    typename Allocator::pointer ptemp;
    typename Allocator::size_type stemp;
    Allocator atemp;

    ptemp      = buffer;
    buffer     = str.buffer;
    str.buffer = ptemp;

    stemp      = buf_length;
    buf_length      = str.buf_length;
    str.buf_length  = stemp;

    stemp      = str_length;
    str_length     = str.str_length;
    str.str_length = stemp;

    atemp      = mem;
    mem        = str.mem;
    str.mem    = atemp;
  }

  // find( const basic_string &, size_type ) const
  // *********************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find(
      const basic_string &str,
      size_type pos ) const
  {
    return( find( str.buffer, pos, str.str_length ) );
  }

  // find( const CharT *, size_type, size_type ) const
  // *************************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find(
      const CharT *s,
      size_type pos,
      size_type n ) const
  {
    if( str_length < pos      ) return( npos );
    if( str_length - pos < n  ) return( npos );
    if( str_length - pos == 0 ) return( pos  );  // ?

    while( pos + n <= str_length ) {
      bool found = true;
      for( size_type i = 0; i < n; ++i ) {
        if( Traits::eq( buffer[pos + i], s[i] ) == false ) {
          found = false;
          break;
        }
      }
      if( found ) return( pos );
      ++pos;
    }
    return( npos );
  }

  // find( const CharT *, size_type ) const
  // **************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find(
      const CharT *s,
      size_type pos ) const
  {
    return( find( s, pos, Traits::length( s ) ) );
  }

  // find( CharT, size_type ) const
  // ******************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find(
      CharT c,
      size_type pos ) const
  {
    return( find( basic_string( 1, c ), pos ) );
  }

  // rfind( const basic_string &, size_type ) const
  // **********************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::rfind(
      const basic_string &str,
      size_type pos ) const
  {
    return( rfind( str.buffer, pos, str.str_length ) );
  }

  // rfind( const CharT *, size_type, size_type ) const
  // **************************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::rfind(
      const CharT *s,
      size_type pos,
      size_type n ) const
  {
    if( str_length < n ) return( npos );
    size_type index = str_length - n;
    index = ( pos < index ) ? pos : index;
    ++index;
    do {
      bool found = true;
      --index;
      for( size_type i = 0; i < n; ++i ) {
        if( Traits::eq( buffer[index + i], s[i] ) == false ) {
          found = false;
          break;
        }
      }
      if( found ) return( index );
    } while( index > 0 );

    return( npos );
  }

  // rfind( const CharT *, size_type ) const
  // ***************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::rfind(
      const CharT *s,
      size_type pos ) const
  {
    return( rfind( s, pos, Traits::length( s ) ) );
  }

  // rfind( CharT, size_type ) const
  // *******************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::rfind(
      CharT c,
      size_type pos ) const
  {
    return( rfind( basic_string( 1, c ), pos ) );
  }

  // find_first_of( const basic_string &, size_type ) const
  // ******************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_of(
      const basic_string &str,
      size_type pos ) const
  {
    return( find_first_of( str.buffer, pos, str.str_length ) );
  }

  // find_first_of( const CharT *, size_type, size_type ) const
  // **********************************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_of(
      const CharT *s,
      size_type pos,
      size_type n ) const
  {
    size_type index = pos;

    if( str_length < index ) return( npos );

    while( index < str_length ) {
      for( size_type i = 0; i < n; ++i ) {
        if( Traits::eq( buffer[index], s[i] ) == true ) {
          return( index );
        }
      }
      ++index;
    }

    return( npos );
  }

  // find_first_of( const CharT *, size_type ) const
  // ***********************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_of(
      const CharT *s,
      size_type pos ) const
  {
    return( find_first_of(  s, pos, Traits::length( s ) ) );
  }

  // find_first_of( CharT, size_type ) const
  // ***************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_of(
      CharT c,
      size_type pos ) const
  {
    return( find_first_of( basic_string( 1, c ), pos ) );
  }

  // find_last_of( const basic_string &, size_type ) const
  // *****************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_of(
      const basic_string &str,
      size_type pos ) const
  {
    return( find_last_of( str.buffer, pos, str.str_length ) );
  }

  // find_last_of( const CharT *, size_type, size_type ) const
  // *********************************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_of(
      const CharT *s,
      size_type pos,
      size_type n ) const
  {
    size_type index = pos;

    if( str_length < index ) index = str_length - 1;

    while( index != npos ) {
      for( size_type i = 0; i < n; ++i ) {
        if( Traits::eq( buffer[index], s[i] ) == true ) {
          return( index );
        }
      }
      --index;
    }

    return( npos );
  }

  // find_last_of( const CharT *, size_type ) const
  // **********************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_of(
      const CharT *s,
      size_type pos ) const
  {
    return( find_last_of( s, pos, Traits::length( s ) ) );
  }

  // find_last_of( CharT, size_type ) const
  // **************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_of(
      CharT c,
      size_type pos ) const
  {
    return( find_last_of( basic_string( 1, c ), pos ) );
  }

  // find_first_not_of( const basic_string &, size_type ) const
  // **********************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_not_of(
      const basic_string &str,
      size_type pos ) const
  {
    return( find_first_not_of( str.buffer, pos, str.str_length ) );
  }

  // find_first_not_of( const CharT *, size_type, size_type ) const
  // **************************************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_not_of(
      const CharT *s,
      size_type pos,
      size_type n ) const
  {
    size_type index = pos;

    if( str_length <= index ) return( npos );

    while( index < str_length ) {
      bool found = false;
      for( size_type i = 0; i < n; ++i ) {
        if( Traits::eq( buffer[index], s[i] ) == true ) {
          found = true;
          break;
        }
      }
      if ( !found ) return( index );
      ++index;
    }

    return( npos );
  }

  // find_first_not_of( const CharT *, size_type ) const
  // ***************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_not_of(
      const CharT *s,
      size_type pos ) const
  {
    return( find_first_not_of( s, pos, Traits::length( s ) ) );
  }

  // find_first_not_of( CharT, size_type ) const
  // *******************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_first_not_of(
      CharT c,
      size_type pos ) const
  {
    return( find_first_not_of( basic_string( 1, c ), pos ) );
  }

  // find_last_not_of( const basic_string &, size_type ) const
  // *********************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_not_of(
      const basic_string &str,
      size_type pos ) const
  {
    return( find_last_not_of( str.buffer, pos, str.str_length ) );
  }

  // find_last_not_of( const CharT *, size_type, size_type ) const
  // *************************************************************
  template< class CharT, class Traits, class Allocator >
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_not_of(
      const CharT *s,
      size_type pos,
      size_type n ) const
  {
    size_type index = pos;

    if( str_length <= index ) index = str_length - 1;

    while( index != npos ) {
      bool found = false;
      for( size_type i = 0; i < n; ++i ) {
        if( Traits::eq( buffer[index], s[i] ) == true ) {
          found = true;
          break;
        }
      }
      if( !found ) return( index );
      --index;
    }

    return( npos );
  }

  // find_last_not_of( const CharT *, size_type ) const
  // **************************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_not_of(
      const CharT *s,
      size_type pos ) const
  {
    return( find_last_not_of( s, pos, Traits::length( s ) ) );
  }

  // find_last_not_of( CharT, size_type ) const
  // ******************************************
  template< class CharT, class Traits, class Allocator >
  inline
  typename basic_string< CharT, Traits, Allocator >::size_type
    basic_string< CharT, Traits, Allocator >::find_last_not_of(
      CharT c,
      size_type pos ) const
  {
    return( find_last_not_of( basic_string( 1, c ), pos ) );
  }

  // substr( size_type, size_type ) const
  // ************************************
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >
    basic_string< CharT, Traits, Allocator >::substr(
      size_type pos,
      size_type n ) const
  {
    if( pos > str_length )
      throw out_of_range( "basic_string::substr" );

    size_type sublength = (n < str_length - pos) ? n : str_length - pos;
    return( basic_string( buffer + pos, sublength ) );
  }

  // ======================================
  // Ordinary functions using basic_string.
  // ======================================

  // operator+( const basic_string &, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >
    operator+( const basic_string< CharT, Traits, Allocator > &left,
               const basic_string< CharT, Traits, Allocator > &right )
  {
    basic_string< CharT, Traits, Allocator > temp(left);
    temp += right;
    return( temp );
  }

  // operator+( const CharT *, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >
    operator+( const CharT *left,
               const basic_string< CharT, Traits, Allocator > &right )
  {
    basic_string< CharT, Traits, Allocator > temp(left);
    temp += right;
    return( temp );
  }

  // operator+( const basic_string &, const CharT * )
  // ++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >
    operator+( const basic_string< CharT, Traits, Allocator > &left,
               const CharT *right )
  {
    basic_string< CharT, Traits, Allocator > temp(left);
    temp += right;
    return( temp );
  }

  // operator+( CharT, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >
    operator+( CharT left,
               const basic_string< CharT, Traits, Allocator > &right )
  {
    basic_string< CharT, Traits, Allocator > temp(1, left);
    temp += right;
    return( temp );
  }

  // operator+( const basic_string &, CharT )
  // ++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  basic_string< CharT, Traits, Allocator >
    operator+( const basic_string< CharT, Traits, Allocator > &left,
               CharT right )
  {
    basic_string< CharT, Traits, Allocator > temp(left);
    temp += right;
    return( temp );
  }

  // operator==( const basic_string &, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  bool operator==( const basic_string< CharT, Traits, Allocator > &left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    if( left.str_length != right.str_length ) return false;
    return( Traits::compare( left.buffer, right.buffer, left.str_length ) == 0 );
  }

  // operator==( const CharT *, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  bool operator==( const CharT *left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    if( Traits::length( left ) != right.str_length ) return false;
    return( Traits::compare( left, right.buffer, right.str_length ) == 0 );
  }

  // operator==( const basic_string &, const CharT * )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  bool operator==( const basic_string< CharT, Traits, Allocator > &left,
                   const CharT *right )
  {
    if( left.str_length != Traits::length( right ) ) return false;
    return( Traits::compare( left.buffer, right, left.str_length ) == 0 );
  }

  // operator!=( const basic_string &, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator!=( const basic_string< CharT, Traits, Allocator > &left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    return( !( left == right ) );
  }

  // operator!=( const CharT *, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator!=( const CharT *left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    return( !( left == right ) );
  }

  // operator!=( const basic_string &, const CharT * )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator!=( const basic_string< CharT, Traits, Allocator > &left,
                   const CharT *right )
  {
    return( !( left == right ) );
  }

  // operator<( const basic_string &, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  bool operator<( const basic_string< CharT, Traits, Allocator > &left,
                  const basic_string< CharT, Traits, Allocator > &right )
  {
    Allocator::size_type common_length = left.str_length;
    if( right.str_length < common_length ) common_length = right.str_length;
    int result = Traits::compare( left.buffer, right.buffer, common_length );
    if( result < 0 ) return true;
    if( result == 0 && left.str_length < right.str_length ) return true;
    return( false );
  }

  // operator<( const CharT *, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  bool operator<( const CharT *left,
                  const basic_string< CharT, Traits, Allocator > &right )
  {
    Allocator::size_type raw_length = Traits::length( left );
    Allocator::size_type common_length = raw_length;
    if( right.str_length < common_length ) common_length = right.str_length;
    int result = Traits::compare( left, right.buffer, common_length );
    if( result < 0 ) return true;
    if( result == 0 && raw_length < right.str_length ) return true;
    return( false );
  }

  // operator<( const basic_string &, const CharT * )
  // ++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  bool operator<( const basic_string< CharT, Traits, Allocator > &left,
                  const CharT *right )
  {
    Allocator::size_type raw_length = Traits::length( right );
    Allocator::size_type common_length = left.str_length;
    if( raw_length < common_length ) common_length = raw_length;
    int result = Traits::compare( left.buffer, right, common_length );
    if( result < 0 ) return true;
    if( result == 0 && left.str_length < raw_length ) return true;
    return( false );
  }

  // operator>( const basic_string &, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator>( const basic_string< CharT, Traits, Allocator > &left,
                  const basic_string< CharT, Traits, Allocator > &right )
  {
    return( right < left );
  }

  // operator>( const CharT *, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator>( const CharT *left,
                  const basic_string< CharT, Traits, Allocator > &right )
  {
    return( right < left );
  }

  // operator>( const basic_string &, const CharT * )
  // ++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator>( const basic_string< CharT, Traits, Allocator > &left,
                  const CharT *right )
  {
    return( right < left );
  }

  // operator<=( const basic_string &, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator<=( const basic_string< CharT, Traits, Allocator > &left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    return( !( left > right ) );
  }

  // operator<=( const CharT *, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator<=( const CharT *left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    return( !( left > right ) );
  }

  // operator<=( const basic_string &, const CharT * )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator<=( const basic_string< CharT, Traits, Allocator > &left,
                   const CharT *right )
  {
    return( !( left > right ) );
  }

  // operator>=( const basic_string &, const basic_string & )
  // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator>=( const basic_string< CharT, Traits, Allocator > &left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    return( !( left < right ) );
  }

  // operator>=( const CharT *, const basic_string & )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator>=( const CharT *left,
                   const basic_string< CharT, Traits, Allocator > &right )
  {
    return( !( left < right ) );
  }

  // operator>=( const basic_string &, const CharT * )
  // +++++++++++++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  bool operator>=( const basic_string< CharT, Traits, Allocator > &left,
                   const CharT *right )
  {
    return( !( left < right ) );
  }

  // String swap ambiguous if general swap (in algorithm) visible.
  // Need partial ordering of function templates for this to work.
  //
  #ifdef __NEVER
  // swap( basic_string &, basic_string & )
  // ++++++++++++++++++++++++++++++++++++++
  template< class CharT, class Traits, class Allocator >
  inline
  void swap(
      basic_string< CharT, Traits, Allocator > &left,
      basic_string< CharT, Traits, Allocator > &right )
  {
    left.swap( right );
  }
  #endif

} // namespace std

#endif