lex.l revision 50880 
1%{
2/*
3 * Copyright (c) 1998 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. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *      This product includes software developed by Kungliga Tekniska
21 *      H�gskolan and its contributors.
22 *
23 * 4. Neither the name of the Institute nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40/*
41 * This is to handle the definition of this symbol in some AIX
42 * headers, which will conflict with the definition that lex will
43 * generate for it.  It's only a problem for AIX lex.
44 */
45
46#undef ECHO
47
48#include "compile_et.h"
49#include "parse.h"
50
51#if 0
52RCSID("$Id: lex.l,v 1.4 1998/11/20 05:58:52 assar Exp $");
53#endif
54
55static unsigned lineno = 1;
56void error_message(char *, ...);
57int getstring(void);
58
59%}
60
61
62%%
63et			{ return ET; }
64error_table		{ return ET; }
65ec			{ return EC; }
66error_code		{ return EC; }
67prefix			{ return PREFIX; }
68index			{ return INDEX; }
69id			{ return ID; }
70end			{ 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 */
81int
82yywrap ()
83{
84     return 1;
85}
86#endif
87
88int
89getstring(void)
90{
91    char x[128];
92    int i = 0;
93    int c;
94    int quote = 0;
95    while((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    return STRING;
117}
118
119void
120error_message (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