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/* -*- C++ -*- */
// $Id$
/* This may look like C code, but it is really -*- C++ -*- */
/* Provides an Iterator for keyword characters.
Copyright (C) 1989 Free Software Foundation, Inc.
written by Douglas C. Schmidt (schmidt@ics.uci.edu)
This file is part of GNU GPERF.
GNU GPERF 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 1, or (at your option)
any later version.
GNU GPERF 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 GNU GPERF; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Provides an Iterator that expands and decodes a control string
containing digits and ranges, returning an integer every time the
generator function is called. This is used to decode the user's
key position requests. For example: "-k 1,2,5-10,$" will return 1,
2, 5, 6, 7, 8, 9, 10, and 0 ( representing the abstract ``last
character of the key'' on successive calls to the member function
operator (). No errors are handled in these routines, they are
passed back to the calling routines via a user-supplied Error_Value */
#ifndef iterator_h
#define iterator_h 1
#include "Options.h"
class Iterator
{
public:
Iterator (char *s, int lo, int hi, int word_end, int bad_val, int key_end);
int operator () (void);
private:
char *str;
// A pointer to the string provided by the user.
int end;
// Value returned after last key is processed.
int end_word;
// A value marking the abstract ``end of word'' (usually '$').
int error_value;
// Error value returned when input is syntactically erroneous.
int hi_bound;
// Greatest possible value, inclusive.
int lo_bound;
// Smallest possible value, inclusive.
};
#endif
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