1 /* $NetBSD: msgscan.l,v 1.2 1998/04/09 00:32:38 tv 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 <stdio.h> 43 #include <string.h> 44 #include "defs.h" 45 #include "msgparse.h" 46 47 static int level; /* For nested comments. */ 48 49 %} 50 51 %x COMMENT 52 %x BRACE 53 54 %% 55 56 [ \t]+ { /* ignore spaces and tabs */ } 57 58 [\n] { line_no++; } 59 60 ";" { return (int)yytext[0]; } 61 62 message { return MESSAGE; } 63 64 [a-zA-Z][a-zA-Z0-9_]* { 65 yylval.s_value = strdup(yytext); 66 return(NAME); 67 } 68 69 "/*" { level = 1; BEGIN COMMENT; } 70 71 <COMMENT>"/*" { level++; } 72 73 <COMMENT>"*/" { if (level-- == 1) BEGIN 0; } 74 75 <COMMENT>"\n" { line_no++; } 76 77 <COMMENT><<EOF>> { yyerror ("EOF inside a comment."); exit (1); } 78 79 <COMMENT>. {/* eat character */} 80 81 "{" { level = 1; BEGIN BRACE; } 82 83 <BRACE>"\\{" { buff_add_ch('{'); } 84 85 <BRACE>"\\}" { buff_add_ch('}'); } 86 87 <BRACE>"{" { buff_add_ch(yytext[0]); level++; } 88 89 <BRACE>"}" { if (level-- == 1) { 90 BEGIN 0; 91 yylval.s_value = buff_copy(); 92 return VALUE; 93 } else 94 buff_add_ch (yytext[0]); 95 } 96 97 <BRACE>"\n" { buff_add_ch (yytext[0]); line_no++; } 98 99 <BRACE>. { buff_add_ch (yytext[0]); } 100 101 . { 102 if (yytext[0] < ' ') 103 yyerror ("illegal character: ^%c",yytext[0] + '@'); 104 else 105 if (yytext[0] > '~') 106 yyerror ("illegal character: \\%3d", (int) yytext[0]); 107 else 108 yyerror ("illegal character: %s",yytext); 109 110 /* To quiet the compiler */ 111 if (0) unput(0); 112 } 113 %% 114 115 #ifdef SCAN 116 YYSTYPE yylval; 117 118 main() 119 { 120 int val; 121 122 line_no = 1; 123 while ( (val = yylex()) != 0 ) 124 printf ("val = %d\n yytext = %s\n", val, yytext); 125 } 126 #endif 127