| 1 | /* |
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| 2 | * Copyright (c) 1987 The Regents of the University of California. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. All advertising materials mentioning features or use of this software |
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| 14 | * must display the following acknowledgement: |
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| 15 | * This product includes software developed by the University of |
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| 16 | * California, Berkeley and its contributors. |
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| 17 | * 4. Neither the name of the University nor the names of its contributors |
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| 18 | * may be used to endorse or promote products derived from this software |
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| 19 | * without specific prior written permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 31 | * SUCH DAMAGE. |
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| 32 | */ |
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| 33 | |
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| 34 | #ifndef lint |
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| 35 | static char sccsid[] = "@(#)yacc.c 5.6 (Berkeley) 2/26/91"; |
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| 36 | #endif /* not lint */ |
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| 37 | |
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| 38 | #include <stdio.h> |
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| 39 | #include <string.h> |
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| 40 | #include "ctags.h" |
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| 41 | |
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| 42 | /* |
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| 43 | * y_entries: |
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| 44 | * find the yacc tags and put them in. |
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| 45 | */ |
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| 46 | y_entries() |
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| 47 | { |
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| 48 | register int c; |
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| 49 | register char *sp; |
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| 50 | register bool in_rule; |
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| 51 | char tok[MAXTOKEN]; |
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| 52 | |
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| 53 | while (GETC(!=,EOF)) |
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| 54 | switch ((char)c) { |
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| 55 | case '\n': |
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| 56 | SETLINE; |
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| 57 | /* FALLTHROUGH */ |
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| 58 | case ' ': |
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| 59 | case '\f': |
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| 60 | case '\r': |
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| 61 | case '\t': |
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| 62 | break; |
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| 63 | case '{': |
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| 64 | if (skip_key((int)'}')) |
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| 65 | in_rule = NO; |
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| 66 | break; |
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| 67 | case '\'': |
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| 68 | case '"': |
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| 69 | if (skip_key(c)) |
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| 70 | in_rule = NO; |
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| 71 | break; |
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| 72 | case '%': |
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| 73 | if (GETC(==,'%')) |
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| 74 | return; |
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| 75 | (void)ungetc(c,inf); |
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| 76 | break; |
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| 77 | case '/': |
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| 78 | if (GETC(==,'*')) |
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| 79 | skip_comment(); |
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| 80 | else |
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| 81 | (void)ungetc(c,inf); |
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| 82 | break; |
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| 83 | case '|': |
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| 84 | case ';': |
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| 85 | in_rule = NO; |
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| 86 | break; |
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| 87 | default: |
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| 88 | if (in_rule || !isalpha(c) && c != (int)'.' |
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| 89 | && c != (int)'_') |
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| 90 | break; |
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| 91 | sp = tok; |
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| 92 | *sp++ = c; |
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| 93 | while (GETC(!=,EOF) && (intoken(c) || c == (int)'.')) |
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| 94 | *sp++ = c; |
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| 95 | *sp = EOS; |
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| 96 | getline(); /* may change before ':' */ |
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| 97 | while (iswhite(c)) { |
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| 98 | if (c == (int)'\n') |
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| 99 | SETLINE; |
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| 100 | if (GETC(==,EOF)) |
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| 101 | return; |
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| 102 | } |
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| 103 | if (c == (int)':') { |
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| 104 | pfnote(tok,lineno); |
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| 105 | in_rule = YES; |
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| 106 | } |
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| 107 | else |
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| 108 | (void)ungetc(c,inf); |
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| 109 | } |
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| 110 | } |
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| 111 | |
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| 112 | /* |
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| 113 | * toss_yysec -- |
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| 114 | * throw away lines up to the next "\n%%\n" |
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| 115 | */ |
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| 116 | toss_yysec() |
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| 117 | { |
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| 118 | register int c, /* read character */ |
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| 119 | state; |
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| 120 | |
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| 121 | /* |
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| 122 | * state == 0 : waiting |
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| 123 | * state == 1 : received a newline |
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| 124 | * state == 2 : received first % |
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| 125 | * state == 3 : recieved second % |
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| 126 | */ |
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| 127 | lineftell = ftell(inf); |
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| 128 | for (state = 0;GETC(!=,EOF);) |
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| 129 | switch ((char)c) { |
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| 130 | case '\n': |
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| 131 | ++lineno; |
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| 132 | lineftell = ftell(inf); |
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| 133 | if (state == 3) /* done! */ |
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| 134 | return; |
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| 135 | state = 1; /* start over */ |
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| 136 | break; |
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| 137 | case '%': |
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| 138 | if (state) /* if 1 or 2 */ |
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| 139 | ++state; /* goto 3 */ |
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| 140 | break; |
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| 141 | default: |
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| 142 | state = 0; /* reset */ |
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| 143 | } |
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| 144 | } |
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