1 /* $NetBSD: msgscan.l,v 1.7 2012/03/06 16:26:01 mbalmer 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. The name of Piermont Information Systems Inc. may not be used to endorse 18 * or promote products derived from this software without specific prior 19 * written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31 * THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 %{ 36 /* scan.l: scanner description for message compiler. */ 37 38 #include <sys/cdefs.h> 39 40 #if defined(__RCSID) && !defined(lint) 41 __RCSID("$NetBSD: msgscan.l,v 1.7 2012/03/06 16:26:01 mbalmer Exp $"); 42 #endif 43 44 45 #include <stdio.h> 46 #include <string.h> 47 #include "defs.h" 48 #include "msgparse.h" 49 50 static int level; /* For nested comments. */ 51 52 %} 53 54 %x COMMENT 55 %x BRACE 56 57 %option noinput 58 59 %% 60 61 [ \t]+ { /* ignore spaces and tabs */ } 62 63 [\n] { line_no++; } 64 65 ";" { return (int)yytext[0]; } 66 67 message { return MESSAGE; } 68 69 [a-zA-Z][a-zA-Z0-9_]* { 70 yylval.s_value = strdup(yytext); 71 return(NAME); 72 } 73 74 "/*" { level = 1; BEGIN COMMENT; } 75 76 <COMMENT>"/*" { level++; } 77 78 <COMMENT>"*/" { if (level-- == 1) BEGIN 0; } 79 80 <COMMENT>"\n" { line_no++; } 81 82 <COMMENT><<EOF>> { yyerror ("EOF inside a comment."); exit (1); } 83 84 <COMMENT>. {/* eat character */} 85 86 "{" { level = 1; BEGIN BRACE; } 87 88 <BRACE>"\\{" { buff_add_ch('{'); } 89 90 <BRACE>"\\}" { buff_add_ch('}'); } 91 92 <BRACE>"{" { buff_add_ch(yytext[0]); level++; } 93 94 <BRACE>"}" { if (level-- == 1) { 95 BEGIN 0; 96 yylval.s_value = buff_copy(); 97 return VALUE; 98 } else 99 buff_add_ch (yytext[0]); 100 } 101 102 <BRACE>"\n" { buff_add_ch (yytext[0]); line_no++; } 103 104 <BRACE>. { buff_add_ch (yytext[0]); } 105 106 . { 107 if (yytext[0] < ' ') 108 yyerror ("illegal character: ^%c",yytext[0] + '@'); 109 else 110 if (yytext[0] > '~') 111 yyerror ("illegal character: \\%3d", (int) yytext[0]); 112 else 113 yyerror ("illegal character: %s",yytext); 114 115 /* To quiet the compiler */ 116 if (0) unput(0); 117 } 118 %% 119 120 #ifdef SCAN 121 YYSTYPE yylval; 122 123 main() 124 { 125 int val; 126 127 line_no = 1; 128 while ( (val = yylex()) != 0 ) 129 printf ("val = %d\n yytext = %s\n", val, yytext); 130 } 131 #endif 132