1 /* $NetBSD: msgscan.l,v 1.5 2009/10/29 14:37:56 christos Exp $ */ 2 3 /* 4 * Copyright 1997 Piermont Information Systems Inc. 5 * All rights reserved. 6 * 7 * Written by Philip A. Nelson for Piermont Information Systems Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software develooped for the NetBSD Project by 20 * Piermont Information Systems Inc. 21 * 4. The name of Piermont Information Systems Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 35 * THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 */ 38 39 %{ 40 /* scan.l: scanner description for message compiler. */ 41 42 #include <sys/cdefs.h> 43 44 #if defined(__RCSID) && !defined(lint) 45 __RCSID("$NetBSD: msgscan.l,v 1.5 2009/10/29 14:37:56 christos Exp $"); 46 #endif 47 48 49 #include <stdio.h> 50 #include <string.h> 51 #include "defs.h" 52 #include "msgparse.h" 53 54 static int level; /* For nested comments. */ 55 56 %} 57 58 %x COMMENT 59 %x BRACE 60 61 %option noinput 62 63 %% 64 65 [ \t]+ { /* ignore spaces and tabs */ } 66 67 [\n] { line_no++; } 68 69 ";" { return (int)yytext[0]; } 70 71 message { return MESSAGE; } 72 73 [a-zA-Z][a-zA-Z0-9_]* { 74 yylval.s_value = strdup(yytext); 75 return(NAME); 76 } 77 78 "/*" { level = 1; BEGIN COMMENT; } 79 80 <COMMENT>"/*" { level++; } 81 82 <COMMENT>"*/" { if (level-- == 1) BEGIN 0; } 83 84 <COMMENT>"\n" { line_no++; } 85 86 <COMMENT><<EOF>> { yyerror ("EOF inside a comment."); exit (1); } 87 88 <COMMENT>. {/* eat character */} 89 90 "{" { level = 1; BEGIN BRACE; } 91 92 <BRACE>"\\{" { buff_add_ch('{'); } 93 94 <BRACE>"\\}" { buff_add_ch('}'); } 95 96 <BRACE>"{" { buff_add_ch(yytext[0]); level++; } 97 98 <BRACE>"}" { if (level-- == 1) { 99 BEGIN 0; 100 yylval.s_value = buff_copy(); 101 return VALUE; 102 } else 103 buff_add_ch (yytext[0]); 104 } 105 106 <BRACE>"\n" { buff_add_ch (yytext[0]); line_no++; } 107 108 <BRACE>. { buff_add_ch (yytext[0]); } 109 110 . { 111 if (yytext[0] < ' ') 112 yyerror ("illegal character: ^%c",yytext[0] + '@'); 113 else 114 if (yytext[0] > '~') 115 yyerror ("illegal character: \\%3d", (int) yytext[0]); 116 else 117 yyerror ("illegal character: %s",yytext); 118 119 /* To quiet the compiler */ 120 if (0) unput(0); 121 } 122 %% 123 124 #ifdef SCAN 125 YYSTYPE yylval; 126 127 main() 128 { 129 int val; 130 131 line_no = 1; 132 while ( (val = yylex()) != 0 ) 133 printf ("val = %d\n yytext = %s\n", val, yytext); 134 } 135 #endif 136