home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
GEMini Atari
/
GEMini_Atari_CD-ROM_Walnut_Creek_December_1993.iso
/
zip
/
gnu
/
gperf.lzh
/
GPERF
/
ITERATOR.H
< prev
next >
Wrap
C/C++ Source or Header
|
1993-07-30
|
2KB
|
50 lines
/* 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, 675 Mass Ave, Cambridge, MA 02139, 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,$" will return 1, 2, 5, 6, 7, 8, 9, 10, and 0 ( representing
the abstract ``last character of the key'' on successive calls to the
member function operator ().
No errors are handled in these routines, they are passed back to the
calling routines via a user-supplied Error_Value */
#pragma once
class Iterator
{
private:
char *str; /* A pointer to the string provided by the user. */
int end; /* Value returned after last key is processed. */
int end_word; /* A value marking the abstract ``end of word'' ( usually '$'). */
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. */
public:
Iterator (char *s, int lo, int hi, int word_end, int bad_val, int key_end);
int operator () (void);
};