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3816d2d1 | 1 | /* |
ffa8a268 KB |
2 | * Copyright (c) 1987 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
af231c96 | 5 | * %sccs.include.redist.c% |
3816d2d1 KB |
6 | */ |
7 | ||
8 | #ifndef lint | |
af231c96 | 9 | static char sccsid[] = "@(#)yacc.c 5.5 (Berkeley) %G%"; |
ffa8a268 | 10 | #endif /* not lint */ |
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11 | |
12 | #include <ctags.h> | |
38dde0cd | 13 | #include <string.h> |
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14 | |
15 | /* | |
16 | * y_entries: | |
17 | * find the yacc tags and put them in. | |
18 | */ | |
19 | y_entries() | |
20 | { | |
21 | register int c; | |
22 | register char *sp; | |
23 | register bool in_rule; | |
24 | char tok[MAXTOKEN]; | |
25 | ||
3816d2d1 KB |
26 | while (GETC(!=,EOF)) |
27 | switch ((char)c) { | |
28 | case '\n': | |
29 | SETLINE; | |
30 | /* FALLTHROUGH */ | |
31 | case ' ': | |
32 | case '\f': | |
33 | case '\r': | |
34 | case '\t': | |
35 | break; | |
36 | case '{': | |
37 | if (skip_key((int)'}')) | |
38 | in_rule = NO; | |
39 | break; | |
40 | case '\'': | |
41 | case '"': | |
42 | if (skip_key(c)) | |
43 | in_rule = NO; | |
44 | break; | |
45 | case '%': | |
46 | if (GETC(==,'%')) | |
47 | return; | |
48 | (void)ungetc(c,inf); | |
49 | break; | |
50 | case '/': | |
51 | if (GETC(==,'*')) | |
52 | skip_comment(); | |
53 | else | |
54 | (void)ungetc(c,inf); | |
55 | break; | |
56 | case '|': | |
57 | case ';': | |
58 | in_rule = NO; | |
59 | break; | |
60 | default: | |
61 | if (in_rule || !isalpha(c) && c != (int)'.' | |
62 | && c != (int)'_') | |
63 | break; | |
64 | sp = tok; | |
65 | *sp++ = c; | |
66 | while (GETC(!=,EOF) && (intoken(c) || c == (int)'.')) | |
67 | *sp++ = c; | |
68 | *sp = EOS; | |
69 | getline(); /* may change before ':' */ | |
70 | while (iswhite(c)) { | |
71 | if (c == (int)'\n') | |
72 | SETLINE; | |
73 | if (GETC(==,EOF)) | |
74 | return; | |
75 | } | |
76 | if (c == (int)':') { | |
77 | pfnote(tok,lineno); | |
78 | in_rule = YES; | |
79 | } | |
80 | else | |
81 | (void)ungetc(c,inf); | |
82 | } | |
83 | } | |
84 | ||
85 | /* | |
86 | * toss_yysec -- | |
87 | * throw away lines up to the next "\n%%\n" | |
88 | */ | |
89 | toss_yysec() | |
90 | { | |
91 | register int c, /* read character */ | |
92 | state; | |
93 | ||
94 | /* | |
95 | * state == 0 : waiting | |
96 | * state == 1 : received a newline | |
97 | * state == 2 : received first % | |
98 | * state == 3 : recieved second % | |
99 | */ | |
100 | lineftell = ftell(inf); | |
101 | for (state = 0;GETC(!=,EOF);) | |
102 | switch ((char)c) { | |
103 | case '\n': | |
104 | ++lineno; | |
105 | lineftell = ftell(inf); | |
106 | if (state == 3) /* done! */ | |
107 | return; | |
108 | state = 1; /* start over */ | |
109 | break; | |
110 | case '%': | |
111 | if (state) /* if 1 or 2 */ | |
112 | ++state; /* goto 3 */ | |
113 | break; | |
114 | default: | |
115 | state = 0; /* reset */ | |
116 | } | |
117 | } |