rcskeys.c revision 11894 
1/* RCS keyword table and match operation */
2
3/* Copyright 1982, 1988, 1989 Walter Tichy
4   Copyright 1990, 1991, 1992, 1993, 1995 Paul Eggert
5   Distributed under license by the Free Software Foundation, Inc.
6
7This file is part of RCS.
8
9RCS is free software; you can redistribute it and/or modify
10it under the terms of the GNU General Public License as published by
11the Free Software Foundation; either version 2, or (at your option)
12any later version.
13
14RCS is distributed in the hope that it will be useful,
15but WITHOUT ANY WARRANTY; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License
20along with RCS; see the file COPYING.
21If not, write to the Free Software Foundation,
2259 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23
24Report problems and direct all questions to:
25
26    rcs-bugs@cs.purdue.edu
27
28*/
29
30/*
31 * $Log: rcskeys.c,v $
32 * Revision 5.4  1995/06/16 06:19:24  eggert
33 * Update FSF address.
34 *
35 * Revision 5.3  1993/11/03 17:42:27  eggert
36 * Add Name keyword.
37 *
38 * Revision 5.2  1991/08/19  03:13:55  eggert
39 * Say `T const' instead of `const T'; it's less confusing for pointer types.
40 * (This change was made in other source files too.)
41 *
42 * Revision 5.1  1991/04/21  11:58:25  eggert
43 * Don't put , just before } in initializer.
44 *
45 * Revision 5.0  1990/08/22  08:12:54  eggert
46 * Add -k.  Ansify and Posixate.
47 *
48 * Revision 4.3  89/05/01  15:13:02  narten
49 * changed copyright header to reflect current distribution rules
50 *
51 * Revision 4.2  87/10/18  10:36:33  narten
52 * Updating version numbers. Changes relative to 1.1 actuallyt
53 * relative to 4.1
54 *
55 * Revision 1.2  87/09/24  14:00:10  narten
56 * Sources now pass through lint (if you ignore printf/sprintf/fprintf
57 * warnings)
58 *
59 * Revision 4.1  83/05/04  10:06:53  wft
60 * Initial revision.
61 *
62 */
63
64
65#include "rcsbase.h"
66
67libId(keysId, "$Id: rcskeys.c,v 5.4 1995/06/16 06:19:24 eggert Exp $")
68
69
70char const *const Keyword[] = {
71    /* This must be in the same order as rcsbase.h's enum markers type. */
72	0,
73	AUTHOR, DATE, HEADER, IDH,
74	LOCKER, LOG, NAME, RCSFILE, REVISION, SOURCE, STATE
75};
76
77
78
79	enum markers
80trymatch(string)
81	char const *string;
82/* function: Checks whether string starts with a keyword followed
83 * by a KDELIM or a VDELIM.
84 * If successful, returns the appropriate marker, otherwise Nomatch.
85 */
86{
87        register int j;
88	register char const *p, *s;
89	for (j = sizeof(Keyword)/sizeof(*Keyword);  (--j);  ) {
90		/* try next keyword */
91		p = Keyword[j];
92		s = string;
93		while (*p++ == *s++) {
94			if (!*p)
95			    switch (*s) {
96				case KDELIM:
97				case VDELIM:
98				    return (enum markers)j;
99				default:
100				    return Nomatch;
101			    }
102		}
103        }
104        return(Nomatch);
105}
106
107