1 %{ 2 /* 3 * Copyright (c) 1998 Kungliga Tekniska H�gskolan 4 * (Royal Institute of Technology, Stockholm, Sweden). 5 * 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 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Kungliga Tekniska 21 * H�gskolan and its contributors. 22 * 23 * 4. Neither the name of the Institute nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 /* 41 * This is to handle the definition of this symbol in some AIX 42 * headers, which will conflict with the definition that lex will 43 * generate for it. It's only a problem for AIX lex. 44 */ 45 46 #undef ECHO 47 48 #include "compile_et.h" 49 #include "parse.h" 50 51 RCSID("$Id: lex.l,v 1.4 1998/11/20 05:58:52 assar Exp $"); 52 53 static unsigned lineno = 1; 54 void error_message(char *, ...); 55 int getstring(void); 56 57 %} 58 59 60 %% 61 et { return ET; } 62 error_table { return ET; } 63 ec { return EC; } 64 error_code { return EC; } 65 prefix { return PREFIX; } 66 index { return INDEX; } 67 id { return ID; } 68 end { return END; } 69 [0-9]+ { yylval.number = atoi(yytext); return NUMBER; } 70 #[^\n]* ; 71 [ \t] ; 72 \n { lineno++; } 73 \" { return getstring(); } 74 [a-zA-Z0-9_]+ { yylval.string = strdup(yytext); return STRING; } 75 . { return *yytext; } 76 %% 77 78 #ifndef yywrap /* XXX */ 79 int 80 yywrap () 81 { 82 return 1; 83 } 84 #endif 85 86 int 87 getstring(void) 88 { 89 char x[128]; 90 int i = 0; 91 int c; 92 int quote = 0; 93 while((c = input()) != EOF){ 94 if(quote) { 95 x[i++] = c; 96 quote = 0; 97 continue; 98 } 99 if(c == '\n'){ 100 error_message("unterminated string"); 101 lineno++; 102 break; 103 } 104 if(c == '\\'){ 105 quote++; 106 continue; 107 } 108 if(c == '\"') 109 break; 110 x[i++] = c; 111 } 112 x[i] = '\0'; 113 yylval.string = strdup(x); 114 return STRING; 115 } 116 117 void 118 error_message (char *format, ...) 119 { 120 va_list args; 121 122 va_start (args, format); 123 fprintf (stderr, "%s:%d:", filename, lineno); 124 vfprintf (stderr, format, args); 125 va_end (args); 126 numerror++; 127 } 128