tokenizer.l revision 1.5 
1%{
2/* $OpenBSD: tokenizer.l,v 1.5 2008/08/16 12:23:50 espie Exp $ */
3/*
4 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18#include "parser.h"
19#include <stdlib.h>
20#include <errno.h>
21#include <stdint.h>
22#include <limits.h>
23
24extern int32_t yylval;
25
26int32_t number(void);
27%}
28
29delim 	[ \t\n]
30ws	{delim}+
31hex	0[xX][0-9a-fA-F]+
32oct	0[0-7]*
33dec	[1-9][0-9]*
34
35%%
36{ws}			{/* just skip it */}
37{hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
38"<="			{ return(LE); }
39">="			{ return(GE); }
40"<<"			{ return(LSHIFT); }
41">>"			{ return(RSHIFT); }
42"=="			{ return(EQ); }
43"!="			{ return(NE); }
44"&&"			{ return(LAND); }
45"||"			{ return(LOR); }
46.			{ return yytext[0]; }
47%%
48
49int32_t
50number()
51{
52	long l;
53
54	errno = 0;
55	l = strtol(yytext, NULL, 0);
56	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
57	    l > INT32_MAX || l < INT32_MIN) {
58		fprintf(stderr, "m4: numeric overflow in expr: %s\n", yytext);
59	}
60	return l;
61
62}
63