fortran.c revision 90382 
1/*
2 * Copyright (c) 1987, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if 0
35#ifndef lint
36static char sccsid[] = "@(#)fortran.c	8.3 (Berkeley) 4/2/94";
37#endif
38#endif
39
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/usr.bin/ctags/fortran.c 90382 2002-02-08 03:01:03Z gallatin $");
42
43#include <ctype.h>
44#include <limits.h>
45#include <stdio.h>
46#include <string.h>
47
48#include "ctags.h"
49
50static void takeprec __P((void));
51
52char *lbp;				/* line buffer pointer */
53
54int
55PF_funcs()
56{
57	bool	pfcnt;			/* pascal/fortran functions found */
58	char	*cp;
59	char	tok[MAXTOKEN];
60
61	for (pfcnt = NO;;) {
62		lineftell = ftell(inf);
63		if (!fgets(lbuf, sizeof(lbuf), inf))
64			return (pfcnt);
65		++lineno;
66		lbp = lbuf;
67		if (*lbp == '%')	/* Ratfor escape to fortran */
68			++lbp;
69		for (; isspace(*lbp); ++lbp)
70			continue;
71		if (!*lbp)
72			continue;
73		switch (*lbp | ' ') {	/* convert to lower-case */
74		case 'c':
75			if (cicmp("complex") || cicmp("character"))
76				takeprec();
77			break;
78		case 'd':
79			if (cicmp("double")) {
80				for (; isspace(*lbp); ++lbp)
81					continue;
82				if (!*lbp)
83					continue;
84				if (cicmp("precision"))
85					break;
86				continue;
87			}
88			break;
89		case 'i':
90			if (cicmp("integer"))
91				takeprec();
92			break;
93		case 'l':
94			if (cicmp("logical"))
95				takeprec();
96			break;
97		case 'r':
98			if (cicmp("real"))
99				takeprec();
100			break;
101		}
102		for (; isspace(*lbp); ++lbp)
103			continue;
104		if (!*lbp)
105			continue;
106		switch (*lbp | ' ') {
107		case 'f':
108			if (cicmp("function"))
109				break;
110			continue;
111		case 'p':
112			if (cicmp("program") || cicmp("procedure"))
113				break;
114			continue;
115		case 's':
116			if (cicmp("subroutine"))
117				break;
118		default:
119			continue;
120		}
121		for (; isspace(*lbp); ++lbp)
122			continue;
123		if (!*lbp)
124			continue;
125		for (cp = lbp + 1; *cp && intoken(*cp); ++cp)
126			continue;
127		if ((cp = lbp + 1))
128			continue;
129		*cp = EOS;
130		(void)strcpy(tok, lbp);
131		getline();			/* process line for ex(1) */
132		pfnote(tok, lineno);
133		pfcnt = YES;
134	}
135	/*NOTREACHED*/
136}
137
138/*
139 * cicmp --
140 *	do case-independent strcmp
141 */
142int
143cicmp(cp)
144	const char	*cp;
145{
146	int	len;
147	char	*bp;
148
149	for (len = 0, bp = lbp; *cp && (*cp &~ ' ') == (*bp++ &~ ' ');
150	    ++cp, ++len)
151		continue;
152	if (!*cp) {
153		lbp += len;
154		return (YES);
155	}
156	return (NO);
157}
158
159static void
160takeprec()
161{
162	for (; isspace(*lbp); ++lbp)
163		continue;
164	if (*lbp == '*') {
165		for (++lbp; isspace(*lbp); ++lbp)
166			continue;
167		if (!isdigit(*lbp))
168			--lbp;			/* force failure */
169		else
170			while (isdigit(*++lbp))
171				continue;
172	}
173}
174