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