1 %{ 2 /* 3 * Copyright (c) 1998 - 2000 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. Neither the name of the Institute nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * This is to handle the definition of this symbol in some AIX 37 * headers, which will conflict with the definition that lex will 38 * generate for it. It's only a problem for AIX lex. 39 */ 40 41 #undef ECHO 42 43 #include "compile_et.h" 44 #include "parse.h" 45 #include "lex.h" 46 47 RCSID("$Id: lex.l,v 1.6 2000/06/22 00:42:52 assar Exp $"); 48 49 static unsigned lineno = 1; 50 static int getstring(void); 51 52 #define YY_NO_UNPUT 53 54 #undef ECHO 55 56 %} 57 58 59 %% 60 et { return ET; } 61 error_table { return ET; } 62 ec { return EC; } 63 error_code { return EC; } 64 prefix { return PREFIX; } 65 index { return INDEX; } 66 id { return ID; } 67 end { return END; } 68 [0-9]+ { yylval.number = atoi(yytext); return NUMBER; } 69 #[^\n]* ; 70 [ \t] ; 71 \n { lineno++; } 72 \" { return getstring(); } 73 [a-zA-Z0-9_]+ { yylval.string = strdup(yytext); return STRING; } 74 . { return *yytext; } 75 %% 76 77 #ifndef yywrap /* XXX */ 78 int 79 yywrap () 80 { 81 return 1; 82 } 83 #endif 84 85 static int 86 getstring(void) 87 { 88 char x[128]; 89 int i = 0; 90 int c; 91 int quote = 0; 92 while((c = input()) != EOF){ 93 if(quote) { 94 x[i++] = c; 95 quote = 0; 96 continue; 97 } 98 if(c == '\n'){ 99 error_message("unterminated string"); 100 lineno++; 101 break; 102 } 103 if(c == '\\'){ 104 quote++; 105 continue; 106 } 107 if(c == '\"') 108 break; 109 x[i++] = c; 110 } 111 x[i] = '\0'; 112 yylval.string = strdup(x); 113 return STRING; 114 } 115 116 void 117 error_message (const char *format, ...) 118 { 119 va_list args; 120 121 va_start (args, format); 122 fprintf (stderr, "%s:%d:", filename, lineno); 123 vfprintf (stderr, format, args); 124 va_end (args); 125 numerror++; 126 } 127