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
main()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