1 /* 2 * Copyright (c) 1987, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)yacc.c 8.3 (Berkeley) 4/2/94 34 * $FreeBSD: src/usr.bin/ctags/yacc.c,v 1.3.6.3 2002/07/30 00:55:07 tjr Exp $ 35 * $DragonFly: src/usr.bin/ctags/yacc.c,v 1.2 2003/06/17 04:29:25 dillon Exp $ 36 */ 37 38 #include <ctype.h> 39 #include <limits.h> 40 #include <stdio.h> 41 42 #include "ctags.h" 43 44 /* 45 * y_entries: 46 * find the yacc tags and put them in. 47 */ 48 void 49 y_entries(void) 50 { 51 int c; 52 char *sp; 53 bool in_rule; 54 char tok[MAXTOKEN]; 55 56 in_rule = NO; 57 58 while (GETC(!=, EOF)) 59 switch (c) { 60 case '\n': 61 SETLINE; 62 /* FALLTHROUGH */ 63 case ' ': 64 case '\f': 65 case '\r': 66 case '\t': 67 break; 68 case '{': 69 if (skip_key('}')) 70 in_rule = NO; 71 break; 72 case '\'': 73 case '"': 74 if (skip_key(c)) 75 in_rule = NO; 76 break; 77 case '%': 78 if (GETC(==, '%')) 79 return; 80 (void)ungetc(c, inf); 81 break; 82 case '/': 83 if (GETC(==, '*') || c == '/') 84 skip_comment(c); 85 else 86 (void)ungetc(c, inf); 87 break; 88 case '|': 89 case ';': 90 in_rule = NO; 91 break; 92 default: 93 if (in_rule || (!isalpha(c) && c != '.' && c != '_')) 94 break; 95 sp = tok; 96 *sp++ = c; 97 while (GETC(!=, EOF) && (intoken(c) || c == '.')) 98 *sp++ = c; 99 *sp = EOS; 100 getline(); /* may change before ':' */ 101 while (iswhite(c)) { 102 if (c == '\n') 103 SETLINE; 104 if (GETC(==, EOF)) 105 return; 106 } 107 if (c == ':') { 108 pfnote(tok, lineno); 109 in_rule = YES; 110 } 111 else 112 (void)ungetc(c, inf); 113 } 114 } 115 116 /* 117 * toss_yysec -- 118 * throw away lines up to the next "\n%%\n" 119 */ 120 void 121 toss_yysec(void) 122 { 123 int c; /* read character */ 124 int state; 125 126 /* 127 * state == 0 : waiting 128 * state == 1 : received a newline 129 * state == 2 : received first % 130 * state == 3 : received second % 131 */ 132 lineftell = ftell(inf); 133 for (state = 0; GETC(!=, EOF);) 134 switch (c) { 135 case '\n': 136 ++lineno; 137 lineftell = ftell(inf); 138 if (state == 3) /* done! */ 139 return; 140 state = 1; /* start over */ 141 break; 142 case '%': 143 if (state) /* if 1 or 2 */ 144 ++state; /* goto 3 */ 145 break; 146 default: 147 state = 0; /* reset */ 148 break; 149 } 150 } 151