1 %{
2 /*
3  * Copyright (c) 1998 - 2000 Kungliga Tekniska H�gskolan
4  * (Royal Institute of Technology, Stockholm, Sweden).
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  *
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  *
18  * 3. Neither the name of the Institute nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 /*
36  * This is to handle the definition of this symbol in some AIX
37  * headers, which will conflict with the definition that lex will
38  * generate for it.  It's only a problem for AIX lex.
39  */
40 
41 #undef ECHO
42 
43 #include "compile_et.h"
44 #include "parse.h"
45 #include "lex.h"
46 
47 RCSID("$Id: lex.l,v 1.8 2005/05/16 08:52:54 lha Exp $");
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 
59 %%
60 et			{ return ET; }
61 error_table		{ return ET; }
62 ec			{ return EC; }
63 error_code		{ return EC; }
64 prefix			{ return PREFIX; }
65 index			{ return INDEX; }
66 id			{ return ID; }
67 end			{ return END; }
68 [0-9]+			{ yylval.number = atoi(yytext); return NUMBER; }
69 #[^\n]*			;
70 [ \t]			;
71 \n			{ lineno++; }
72 \"			{ return getstring(); }
73 [a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
74 .			{ return *yytext; }
75 %%
76 
77 #ifndef yywrap /* XXX */
78 int
79 yywrap ()
80 {
81      return 1;
82 }
83 #endif
84 
85 static int
86 getstring(void)
87 {
88     char x[128];
89     int i = 0;
90     int c;
91     int quote = 0;
92     while(i < sizeof(x) - 1 && (c = input()) != EOF){
93 	if(quote) {
94 	    x[i++] = c;
95 	    quote = 0;
96 	    continue;
97 	}
98 	if(c == '\n'){
99 	    error_message("unterminated string");
100 	    lineno++;
101 	    break;
102 	}
103 	if(c == '\\'){
104 	    quote++;
105 	    continue;
106 	}
107 	if(c == '\"')
108 	    break;
109 	x[i++] = c;
110     }
111     x[i] = '\0';
112     yylval.string = strdup(x);
113     if (yylval.string == NULL)
114         err(1, "malloc");
115     return STRING;
116 }
117 
118 void
119 error_message (const char *format, ...)
120 {
121      va_list args;
122 
123      va_start (args, format);
124      fprintf (stderr, "%s:%d:", filename, lineno);
125      vfprintf (stderr, format, args);
126      va_end (args);
127      numerror++;
128 }
129