1%{
2/* $OpenBSD: tokenizer.l,v 1.10 2017/06/17 01:55:16 bcallah 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 <assert.h>
20#include <stdlib.h>
21#include <errno.h>
22#include <stdint.h>
23#include <limits.h>
24
25extern void m4_warnx(const char *, ...);
26extern int mimic_gnu;
27extern int32_t yylval;
28
29int32_t number(void);
30int32_t parse_radix(void);
31%}
32
33delim 	[ \t\n]
34ws	{delim}+
35hex	0[xX][0-9a-fA-F]+
36oct	0[0-7]*
37dec	[1-9][0-9]*
38radix	0[rR][0-9]+:[0-9a-zA-Z]+
39
40%option noyywrap
41
42%%
43{ws}			{/* just skip it */}
44{hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
45{radix}			{ if (mimic_gnu) {
46				yylval = parse_radix(); return(NUMBER);
47			  } else {
48			  	return(ERROR);
49			  }
50			}
51"<="			{ return(LE); }
52">="			{ return(GE); }
53"<<"			{ return(LSHIFT); }
54">>"			{ return(RSHIFT); }
55"=="			{ return(EQ); }
56"!="			{ return(NE); }
57"&&"			{ return(LAND); }
58"||"			{ return(LOR); }
59"**"			{ if (mimic_gnu) { return (EXPONENT); } }
60.			{ return yytext[0]; }
61%%
62
63int32_t
64number()
65{
66	long l;
67
68	errno = 0;
69	l = strtol(yytext, NULL, 0);
70	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
71	    l > INT32_MAX || l < INT32_MIN)
72		m4_warnx("numeric overflow in expr: %s", yytext);
73	return l;
74}
75
76int32_t
77parse_radix()
78{
79	long base;
80	char *next;
81	long l;
82	int d;
83
84	l = 0;
85	base = strtol(yytext+2, &next, 0);
86	if (base > 36 || next == NULL) {
87		m4_warnx("error in number %s", yytext);
88	} else {
89		next++;
90		while (*next != 0) {
91			if (*next >= '0' && *next <= '9')
92				d = *next - '0';
93			else if (*next >= 'a' && *next <= 'z')
94				d = *next - 'a' + 10;
95			else {
96				assert(*next >= 'A' && *next <= 'Z');
97				d = *next - 'A' + 10;
98			}
99			if (d >= base) {
100				m4_warnx("error in number %s", yytext);
101				return 0;
102			}
103			l = base * l + d;
104			next++;
105		}
106	}
107	return l;
108}
109
110