projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 3816d2d1 KB |
1 | /* |
| 2 | * Copyright (c) 1987 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef lint | |
| 2a5dd7cd | 8 | static char sccsid[] = "@(#)yacc.c 5.2 (Berkeley) %G%"; |
| 3816d2d1 KB |
9 | #endif not lint |
| 10 | ||
| 11 | #include <ctags.h> | |
| 12 | #include <strings.h> | |
| 13 | ||
| 14 | /* | |
| 15 | * y_entries: | |
| 16 | * find the yacc tags and put them in. | |
| 17 | */ | |
| 18 | y_entries() | |
| 19 | { | |
| 20 | register int c; | |
| 21 | register char *sp; | |
| 22 | register bool in_rule; | |
| 23 | char tok[MAXTOKEN]; | |
| 24 | ||
| 3816d2d1 KB |
25 | while (GETC(!=,EOF)) |
| 26 | switch ((char)c) { | |
| 27 | case '\n': | |
| 28 | SETLINE; | |
| 29 | /* FALLTHROUGH */ | |
| 30 | case ' ': | |
| 31 | case '\f': | |
| 32 | case '\r': | |
| 33 | case '\t': | |
| 34 | break; | |
| 35 | case '{': | |
| 36 | if (skip_key((int)'}')) | |
| 37 | in_rule = NO; | |
| 38 | break; | |
| 39 | case '\'': | |
| 40 | case '"': | |
| 41 | if (skip_key(c)) | |
| 42 | in_rule = NO; | |
| 43 | break; | |
| 44 | case '%': | |
| 45 | if (GETC(==,'%')) | |
| 46 | return; | |
| 47 | (void)ungetc(c,inf); | |
| 48 | break; | |
| 49 | case '/': | |
| 50 | if (GETC(==,'*')) | |
| 51 | skip_comment(); | |
| 52 | else | |
| 53 | (void)ungetc(c,inf); | |
| 54 | break; | |
| 55 | case '|': | |
| 56 | case ';': | |
| 57 | in_rule = NO; | |
| 58 | break; | |
| 59 | default: | |
| 60 | if (in_rule || !isalpha(c) && c != (int)'.' | |
| 61 | && c != (int)'_') | |
| 62 | break; | |
| 63 | sp = tok; | |
| 64 | *sp++ = c; | |
| 65 | while (GETC(!=,EOF) && (intoken(c) || c == (int)'.')) | |
| 66 | *sp++ = c; | |
| 67 | *sp = EOS; | |
| 68 | getline(); /* may change before ':' */ | |
| 69 | while (iswhite(c)) { | |
| 70 | if (c == (int)'\n') | |
| 71 | SETLINE; | |
| 72 | if (GETC(==,EOF)) | |
| 73 | return; | |
| 74 | } | |
| 75 | if (c == (int)':') { | |
| 76 | pfnote(tok,lineno); | |
| 77 | in_rule = YES; | |
| 78 | } | |
| 79 | else | |
| 80 | (void)ungetc(c,inf); | |
| 81 | } | |
| 82 | } | |
| 83 | ||
| 84 | /* | |
| 85 | * toss_yysec -- | |
| 86 | * throw away lines up to the next "\n%%\n" | |
| 87 | */ | |
| 88 | toss_yysec() | |
| 89 | { | |
| 90 | register int c, /* read character */ | |
| 91 | state; | |
| 92 | ||
| 93 | /* | |
| 94 | * state == 0 : waiting | |
| 95 | * state == 1 : received a newline | |
| 96 | * state == 2 : received first % | |
| 97 | * state == 3 : recieved second % | |
| 98 | */ | |
| 99 | lineftell = ftell(inf); | |
| 100 | for (state = 0;GETC(!=,EOF);) | |
| 101 | switch ((char)c) { | |
| 102 | case '\n': | |
| 103 | ++lineno; | |
| 104 | lineftell = ftell(inf); | |
| 105 | if (state == 3) /* done! */ | |
| 106 | return; | |
| 107 | state = 1; /* start over */ | |
| 108 | break; | |
| 109 | case '%': | |
| 110 | if (state) /* if 1 or 2 */ | |
| 111 | ++state; /* goto 3 */ | |
| 112 | break; | |
| 113 | default: | |
| 114 | state = 0; /* reset */ | |
| 115 | } | |
| 116 | } |