1 /*	$NetBSD: lex.l,v 1.1.1.1 2011/04/13 18:14:43 elric Exp $	*/
2 
3 %{
4 /*
5  * Copyright (c) 1998 - 2000 Kungliga Tekniska Högskolan
6  * (Royal Institute of Technology, Stockholm, Sweden).
7  * All rights reserved.
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  *
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  *
20  * 3. Neither the name of the Institute nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 /*
38  * This is to handle the definition of this symbol in some AIX
39  * headers, which will conflict with the definition that lex will
40  * generate for it.  It's only a problem for AIX lex.
41  */
42 
43 #undef ECHO
44 
45 #include "compile_et.h"
46 #include "parse.h"
47 #include "lex.h"
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 %option nounput
59 
60 %%
61 et			{ return ET; }
62 error_table		{ return ET; }
63 ec			{ return EC; }
64 error_code		{ return EC; }
65 prefix			{ return PREFIX; }
66 index			{ return INDEX; }
67 id			{ return ID; }
68 end			{ return END; }
69 [0-9]+			{ yylval.number = atoi(yytext); return NUMBER; }
70 #[^\n]*			;
71 [ \t]			;
72 \n			{ lineno++; }
73 \"			{ return getstring(); }
74 [a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
75 .			{ return *yytext; }
76 %%
77 
78 #ifndef yywrap /* XXX */
79 int
80 yywrap ()
81 {
82      return 1;
83 }
84 #endif
85 
86 static int
87 getstring(void)
88 {
89     char x[128];
90     int i = 0;
91     int c;
92     int quote = 0;
93     while(i < sizeof(x) - 1 && (c = input()) != EOF){
94 	if(quote) {
95 	    x[i++] = c;
96 	    quote = 0;
97 	    continue;
98 	}
99 	if(c == '\n'){
100 	    _lex_error_message("unterminated string");
101 	    lineno++;
102 	    break;
103 	}
104 	if(c == '\\'){
105 	    quote++;
106 	    continue;
107 	}
108 	if(c == '\"')
109 	    break;
110 	x[i++] = c;
111     }
112     x[i] = '\0';
113     yylval.string = strdup(x);
114     if (yylval.string == NULL)
115         err(1, "malloc");
116     return STRING;
117 }
118 
119 void
120 _lex_error_message (const char *format, ...)
121 {
122      va_list args;
123 
124      va_start (args, format);
125      fprintf (stderr, "%s:%d:", filename, lineno);
126      vfprintf (stderr, format, args);
127      va_end (args);
128      numerror++;
129 }
130