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1.9 ! fgsch 1: /* $OpenBSD: yacc.c,v 1.8 2009/10/27 23:59:37 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: yacc.c,v 1.3 1995/03/26 20:14:12 glass Exp $ */
3:
4: /*
5: * Copyright (c) 1987, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.6 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <ctype.h>
34: #include <limits.h>
35: #include <stdio.h>
36: #include <string.h>
37:
38: #include "ctags.h"
39:
40: /*
41: * y_entries:
42: * find the yacc tags and put them in.
43: */
44: void
1.7 deraadt 45: y_entries(void)
1.1 deraadt 46: {
47: int c;
48: char *sp;
49: bool in_rule;
50: char tok[MAXTOKEN];
51:
52: in_rule = NO;
53:
54: while (GETC(!=, EOF))
55: switch (c) {
56: case '\n':
57: SETLINE;
58: /* FALLTHROUGH */
59: case ' ':
60: case '\f':
61: case '\r':
62: case '\t':
63: break;
64: case '{':
65: if (skip_key('}'))
66: in_rule = NO;
67: break;
68: case '\'':
69: case '"':
70: if (skip_key(c))
71: in_rule = NO;
72: break;
73: case '%':
74: if (GETC(==, '%'))
75: return;
76: (void)ungetc(c, inf);
77: break;
78: case '/':
79: if (GETC(==, '*'))
1.5 pjanzen 80: skip_comment('*');
1.1 deraadt 81: else
82: (void)ungetc(c, inf);
83: break;
84: case '|':
85: case ';':
86: in_rule = NO;
87: break;
88: default:
1.3 deraadt 89: if (in_rule || (!isalpha(c) && c != '.' && c != '_'))
1.1 deraadt 90: break;
91: sp = tok;
92: *sp++ = c;
93: while (GETC(!=, EOF) && (intoken(c) || c == '.'))
94: *sp++ = c;
95: *sp = EOS;
1.9 ! fgsch 96: get_line(); /* may change before ':' */
1.1 deraadt 97: while (iswhite(c)) {
98: if (c == '\n')
99: SETLINE;
100: if (GETC(==, EOF))
101: return;
102: }
103: if (c == ':') {
104: pfnote(tok, lineno);
105: in_rule = YES;
106: }
107: else
108: (void)ungetc(c, inf);
109: }
110: }
111:
112: /*
113: * toss_yysec --
114: * throw away lines up to the next "\n%%\n"
115: */
116: void
1.7 deraadt 117: toss_yysec(void)
1.1 deraadt 118: {
119: int c; /* read character */
120: int state;
121:
122: /*
123: * state == 0 : waiting
124: * state == 1 : received a newline
125: * state == 2 : received first %
1.4 aaron 126: * state == 3 : received second %
1.1 deraadt 127: */
128: lineftell = ftell(inf);
129: for (state = 0; GETC(!=, EOF);)
130: switch (c) {
131: case '\n':
132: ++lineno;
133: lineftell = ftell(inf);
134: if (state == 3) /* done! */
135: return;
136: state = 1; /* start over */
137: break;
138: case '%':
139: if (state) /* if 1 or 2 */
140: ++state; /* goto 3 */
141: break;
142: default:
143: state = 0; /* reset */
144: break;
145: }
146: }