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1026 |
ivang |
/*
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* Copyright (c) 1987 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)yacc.c 5.6 (Berkeley) 2/26/91";
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#endif /* not lint */
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#include <stdio.h>
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#include <string.h>
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#include "ctags.h"
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/*
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* y_entries:
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* find the yacc tags and put them in.
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*/
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y_entries()
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{
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register int c;
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register char *sp;
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register bool in_rule;
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char tok[MAXTOKEN];
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while (GETC(!=,EOF))
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switch ((char)c) {
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case '\n':
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SETLINE;
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/* FALLTHROUGH */
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case ' ':
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case '\f':
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case '\r':
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case '\t':
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break;
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case '{':
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if (skip_key((int)'}'))
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in_rule = NO;
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break;
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case '\'':
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case '"':
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if (skip_key(c))
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in_rule = NO;
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break;
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case '%':
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if (GETC(==,'%'))
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return;
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(void)ungetc(c,inf);
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break;
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case '/':
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if (GETC(==,'*'))
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skip_comment();
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else
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(void)ungetc(c,inf);
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break;
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case '|':
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case ';':
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in_rule = NO;
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break;
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default:
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if (in_rule || !isalpha(c) && c != (int)'.'
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&& c != (int)'_')
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break;
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sp = tok;
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*sp++ = c;
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while (GETC(!=,EOF) && (intoken(c) || c == (int)'.'))
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*sp++ = c;
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*sp = EOS;
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getline(); /* may change before ':' */
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while (iswhite(c)) {
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if (c == (int)'\n')
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SETLINE;
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if (GETC(==,EOF))
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return;
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}
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if (c == (int)':') {
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pfnote(tok,lineno);
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in_rule = YES;
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}
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else
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(void)ungetc(c,inf);
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}
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}
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/*
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* toss_yysec --
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* throw away lines up to the next "\n%%\n"
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*/
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toss_yysec()
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{
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register int c, /* read character */
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state;
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/*
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* state == 0 : waiting
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* state == 1 : received a newline
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* state == 2 : received first %
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* state == 3 : recieved second %
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*/
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lineftell = ftell(inf);
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for (state = 0;GETC(!=,EOF);)
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switch ((char)c) {
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case '\n':
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++lineno;
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lineftell = ftell(inf);
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if (state == 3) /* done! */
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return;
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state = 1; /* start over */
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break;
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case '%':
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if (state) /* if 1 or 2 */
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++state; /* goto 3 */
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break;
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default:
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state = 0; /* reset */
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}
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}
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