xref: /freebsd/contrib/com_err/lex.l (revision ea906c4152774dff300bb26fbfc1e4188351c89a)
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 /* $FreeBSD$ */
35 
36 /*
37  * This is to handle the definition of this symbol in some AIX
38  * headers, which will conflict with the definition that lex will
39  * generate for it.  It's only a problem for AIX lex.
40  */
41 
42 #undef ECHO
43 
44 #include "compile_et.h"
45 #include "parse.h"
46 #include "lex.h"
47 
48 #if 0
49 RCSID("$Id: lex.l 15143 2005-05-16 08:52:54Z lha $");
50 #endif
51 
52 static unsigned lineno = 1;
53 static int getstring(void);
54 
55 #define YY_NO_UNPUT
56 
57 #undef ECHO
58 
59 %}
60 
61 
62 %%
63 et			{ return ET; }
64 error_table		{ return ET; }
65 ec			{ return EC; }
66 error_code		{ return EC; }
67 prefix			{ return PREFIX; }
68 index			{ return INDEX; }
69 id			{ return ID; }
70 end			{ return END; }
71 [0-9]+			{ yylval.number = atoi(yytext); return NUMBER; }
72 #[^\n]*			;
73 [ \t]			;
74 \n			{ lineno++; }
75 \"			{ return getstring(); }
76 [a-zA-Z0-9_]+		{ yylval.string = strdup(yytext); return STRING; }
77 .			{ return *yytext; }
78 %%
79 
80 #ifndef yywrap /* XXX */
81 int
82 yywrap ()
83 {
84      return 1;
85 }
86 #endif
87 
88 static int
89 getstring(void)
90 {
91     char x[128];
92     int i = 0;
93     int c;
94     int quote = 0;
95     while(i < sizeof(x) - 1 && (c = input()) != EOF){
96 	if(quote) {
97 	    x[i++] = c;
98 	    quote = 0;
99 	    continue;
100 	}
101 	if(c == '\n'){
102 	    error_message("unterminated string");
103 	    lineno++;
104 	    break;
105 	}
106 	if(c == '\\'){
107 	    quote++;
108 	    continue;
109 	}
110 	if(c == '\"')
111 	    break;
112 	x[i++] = c;
113     }
114     x[i] = '\0';
115     yylval.string = strdup(x);
116     if (yylval.string == NULL)
117         err(1, "malloc");
118     return STRING;
119 }
120 
121 void
122 error_message (const char *format, ...)
123 {
124      va_list args;
125 
126      va_start (args, format);
127      fprintf (stderr, "%s:%d:", filename, lineno);
128      vfprintf (stderr, format, args);
129      va_end (args);
130      numerror++;
131 }
132