]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - usr.bin/ctags/yacc.c
Make linux_ptrace() use linux_msg() instead of printf().
[FreeBSD/FreeBSD.git] / usr.bin / ctags / yacc.c
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 #if 0
33 #ifndef lint
34 static char sccsid[] = "@(#)yacc.c      8.3 (Berkeley) 4/2/94";
35 #endif
36 #endif
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
40
41 #include <ctype.h>
42 #include <limits.h>
43 #include <stdio.h>
44
45 #include "ctags.h"
46
47 /*
48  * y_entries:
49  *      find the yacc tags and put them in.
50  */
51 void
52 y_entries(void)
53 {
54         int     c;
55         char    *sp;
56         bool    in_rule;
57         char    tok[MAXTOKEN];
58
59         in_rule = NO;
60
61         while (GETC(!=, EOF))
62                 switch (c) {
63                 case '\n':
64                         SETLINE;
65                         /* FALLTHROUGH */
66                 case ' ':
67                 case '\f':
68                 case '\r':
69                 case '\t':
70                         break;
71                 case '{':
72                         if (skip_key('}'))
73                                 in_rule = NO;
74                         break;
75                 case '\'':
76                 case '"':
77                         if (skip_key(c))
78                                 in_rule = NO;
79                         break;
80                 case '%':
81                         if (GETC(==, '%'))
82                                 return;
83                         (void)ungetc(c, inf);
84                         break;
85                 case '/':
86                         if (GETC(==, '*') || c == '/')
87                                 skip_comment(c);
88                         else
89                                 (void)ungetc(c, inf);
90                         break;
91                 case '|':
92                 case ';':
93                         in_rule = NO;
94                         break;
95                 default:
96                         if (in_rule || (!isalpha(c) && c != '.' && c != '_'))
97                                 break;
98                         sp = tok;
99                         *sp++ = c;
100                         while (GETC(!=, EOF) && (intoken(c) || c == '.'))
101                                 *sp++ = c;
102                         *sp = EOS;
103                         get_line();             /* may change before ':' */
104                         while (iswhite(c)) {
105                                 if (c == '\n')
106                                         SETLINE;
107                                 if (GETC(==, EOF))
108                                         return;
109                         }
110                         if (c == ':') {
111                                 pfnote(tok, lineno);
112                                 in_rule = YES;
113                         }
114                         else
115                                 (void)ungetc(c, inf);
116                 }
117 }
118
119 /*
120  * toss_yysec --
121  *      throw away lines up to the next "\n%%\n"
122  */
123 void
124 toss_yysec(void)
125 {
126         int     c;                      /* read character */
127         int     state;
128
129         /*
130          * state == 0 : waiting
131          * state == 1 : received a newline
132          * state == 2 : received first %
133          * state == 3 : received second %
134          */
135         lineftell = ftell(inf);
136         for (state = 0; GETC(!=, EOF);)
137                 switch (c) {
138                 case '\n':
139                         ++lineno;
140                         lineftell = ftell(inf);
141                         if (state == 3)         /* done! */
142                                 return;
143                         state = 1;              /* start over */
144                         break;
145                 case '%':
146                         if (state)              /* if 1 or 2 */
147                                 ++state;        /* goto 3 */
148                         break;
149                 default:
150                         state = 0;              /* reset */
151                         break;
152                 }
153 }