48 lines
2.1 KiB
C
48 lines
2.1 KiB
C
/* Provides an Iterator for keyword characters.
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Copyright (C) 1989 Free Software Foundation, Inc.
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written by Douglas C. Schmidt (schmidt@ics.uci.edu)
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This file is part of GNU GPERF.
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GNU GPERF is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GNU GPERF is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU GPERF; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Provides an Iterator that expands and decodes a control string containing digits
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and ranges, returning an integer every time the generator function is called.
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This is used to decode the user's key position requests. For example:
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"-k 1,2,5-10,$" will return 1, 2, 5, 6, 7, 8, 9, 10, and 0 ( representing
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the abstract ``last character of the key'' on successive calls to the
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member function operator ().
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No errors are handled in these routines, they are passed back to the
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calling routines via a user-supplied Error_Value */
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#ifndef _iterator_h
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#define _iterator_h
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#include "prototype.h"
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typedef struct iterator
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{
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char *str; /* A pointer to the string provided by the user. */
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int end; /* Value returned after last key is processed. */
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int end_word; /* A value marking the abstract ``end of word'' ( usually '$'). */
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int error_value; /* Error value returned when input is syntactically erroneous. */
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int hi_bound; /* Greatest possible value, inclusive. */
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int lo_bound; /* Smallest possible value, inclusive. */
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} ITERATOR;
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extern void iterator_init P ((char *s, int lo, int hi, int word_end, int bad_val, int key_end));
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extern int next P ((void));
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#endif /* _iterator_h */
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