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