1 /* 2 * Copyright (c) 1987 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)yacc.c 5.4 (Berkeley) 05/15/90"; 20 #endif /* not lint */ 21 22 #include <ctags.h> 23 #include <string.h> 24 25 /* 26 * y_entries: 27 * find the yacc tags and put them in. 28 */ 29 y_entries() 30 { 31 register int c; 32 register char *sp; 33 register bool in_rule; 34 char tok[MAXTOKEN]; 35 36 while (GETC(!=,EOF)) 37 switch ((char)c) { 38 case '\n': 39 SETLINE; 40 /* FALLTHROUGH */ 41 case ' ': 42 case '\f': 43 case '\r': 44 case '\t': 45 break; 46 case '{': 47 if (skip_key((int)'}')) 48 in_rule = NO; 49 break; 50 case '\'': 51 case '"': 52 if (skip_key(c)) 53 in_rule = NO; 54 break; 55 case '%': 56 if (GETC(==,'%')) 57 return; 58 (void)ungetc(c,inf); 59 break; 60 case '/': 61 if (GETC(==,'*')) 62 skip_comment(); 63 else 64 (void)ungetc(c,inf); 65 break; 66 case '|': 67 case ';': 68 in_rule = NO; 69 break; 70 default: 71 if (in_rule || !isalpha(c) && c != (int)'.' 72 && c != (int)'_') 73 break; 74 sp = tok; 75 *sp++ = c; 76 while (GETC(!=,EOF) && (intoken(c) || c == (int)'.')) 77 *sp++ = c; 78 *sp = EOS; 79 getline(); /* may change before ':' */ 80 while (iswhite(c)) { 81 if (c == (int)'\n') 82 SETLINE; 83 if (GETC(==,EOF)) 84 return; 85 } 86 if (c == (int)':') { 87 pfnote(tok,lineno); 88 in_rule = YES; 89 } 90 else 91 (void)ungetc(c,inf); 92 } 93 } 94 95 /* 96 * toss_yysec -- 97 * throw away lines up to the next "\n%%\n" 98 */ 99 toss_yysec() 100 { 101 register int c, /* read character */ 102 state; 103 104 /* 105 * state == 0 : waiting 106 * state == 1 : received a newline 107 * state == 2 : received first % 108 * state == 3 : recieved second % 109 */ 110 lineftell = ftell(inf); 111 for (state = 0;GETC(!=,EOF);) 112 switch ((char)c) { 113 case '\n': 114 ++lineno; 115 lineftell = ftell(inf); 116 if (state == 3) /* done! */ 117 return; 118 state = 1; /* start over */ 119 break; 120 case '%': 121 if (state) /* if 1 or 2 */ 122 ++state; /* goto 3 */ 123 break; 124 default: 125 state = 0; /* reset */ 126 } 127 } 128