1 /* $NetBSD: yacc.c,v 1.12 2009/07/13 19:05:40 roy Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)yacc.c 8.3 (Berkeley) 4/2/94"; 40 #else 41 __RCSID("$NetBSD: yacc.c,v 1.12 2009/07/13 19:05:40 roy Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <ctype.h> 46 #include <limits.h> 47 #include <stdio.h> 48 #include <string.h> 49 50 #include "ctags.h" 51 52 /* 53 * y_entries: 54 * find the yacc tags and put them in. 55 */ 56 void 57 y_entries(void) 58 { 59 int c; 60 char *sp; 61 bool in_rule; 62 char tok[MAXTOKEN]; 63 64 in_rule = NO; 65 66 while (GETC(!=, EOF)) 67 switch (c) { 68 case '\n': 69 SETLINE; 70 /* FALLTHROUGH */ 71 case ' ': 72 case '\f': 73 case '\r': 74 case '\t': 75 break; 76 case '{': 77 if (skip_key('}')) 78 in_rule = NO; 79 break; 80 case '\'': 81 case '"': 82 if (skip_key(c)) 83 in_rule = NO; 84 break; 85 case '%': 86 if (GETC(==, '%')) 87 return; 88 (void)ungetc(c, inf); 89 break; 90 case '/': 91 if (GETC(==, '*')) 92 skip_comment('*'); 93 else 94 (void)ungetc(c, inf); 95 break; 96 case '|': 97 case ';': 98 in_rule = NO; 99 break; 100 default: 101 if (in_rule || (!isalpha(c) && c != '.' && c != '_')) 102 break; 103 sp = tok; 104 *sp++ = c; 105 while (GETC(!=, EOF) && (intoken(c) || c == '.')) 106 *sp++ = c; 107 *sp = EOS; 108 get_line(); /* may change before ':' */ 109 if (c == EOF) 110 return; 111 while (iswhite(c)) { 112 if (c == '\n') 113 SETLINE; 114 if (GETC(==, EOF)) 115 return; 116 } 117 if (c == ':') { 118 pfnote(tok, lineno); 119 in_rule = YES; 120 } 121 else 122 (void)ungetc(c, inf); 123 } 124 } 125 126 /* 127 * toss_yysec -- 128 * throw away lines up to the next "\n%%\n" 129 */ 130 void 131 toss_yysec(void) 132 { 133 int c; /* read character */ 134 int state; 135 136 /* 137 * state == 0 : waiting 138 * state == 1 : received a newline 139 * state == 2 : received first % 140 * state == 3 : received second % 141 */ 142 lineftell = ftell(inf); 143 for (state = 0; GETC(!=, EOF);) 144 switch (c) { 145 case '\n': 146 ++lineno; 147 lineftell = ftell(inf); 148 if (state == 3) /* done! */ 149 return; 150 state = 1; /* start over */ 151 break; 152 case '%': 153 if (state) /* if 1 or 2 */ 154 ++state; /* goto 3 */ 155 break; 156 default: 157 state = 0; /* reset */ 158 break; 159 } 160 } 161