1%option nounput noinput
2%{
3/* $OpenBSD: tokenizer.l,v 1.9 2017/06/15 13:48:42 bcallah Exp $ */
4/*
5 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 *
19 * $FreeBSD: stable/11/usr.bin/m4/tokenizer.l 352281 2019-09-13 07:22:09Z bapt $
20 */
21#include "parser.h"
22#include <assert.h>
23#include <stdlib.h>
24#include <errno.h>
25#include <stdint.h>
26#include <limits.h>
27
28extern void m4_warnx(const char *, ...);
29extern int mimic_gnu;
30extern int32_t yylval;
31
32int32_t number(void);
33int32_t parse_radix(void);
34extern int yylex(void);
35
36#define	YY_DECL	int yylex(void)
37%}
38
39delim 	[ \t\n]
40ws	{delim}+
41hex	0[xX][0-9a-fA-F]+
42oct	0[0-7]*
43dec	[1-9][0-9]*
44radix	0[rR][0-9]+:[0-9a-zA-Z]+
45
46%option noyywrap
47
48%%
49{ws}			{/* just skip it */}
50{hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
51{radix}			{ if (mimic_gnu) {
52				yylval = parse_radix(); return(NUMBER);
53			  } else {
54			  	return(ERROR);
55			  }
56			}
57"<="			{ return(LE); }
58">="			{ return(GE); }
59"<<"			{ return(LSHIFT); }
60">>"			{ return(RSHIFT); }
61"=="			{ return(EQ); }
62"!="			{ return(NE); }
63"&&"			{ return(LAND); }
64"||"			{ return(LOR); }
65"**"			{ if (mimic_gnu) { return (EXPONENT); } }
66.			{ return yytext[0]; }
67%%
68
69int32_t
70number(void)
71{
72	long l;
73
74	errno = 0;
75	l = strtol(yytext, NULL, 0);
76	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
77	    l > INT32_MAX || l < INT32_MIN) {
78		m4_warnx("numeric overflow in expr: %s", yytext);
79	}
80	return l;
81}
82
83int32_t
84parse_radix(void)
85{
86	long base;
87	char *next;
88	long l;
89	int d;
90
91	l = 0;
92	base = strtol(yytext+2, &next, 0);
93	if (base > 36 || next == NULL) {
94		m4_warnx("error in number %s", yytext);
95	} else {
96		next++;
97		while (*next != 0) {
98			if (*next >= '0' && *next <= '9')
99				d = *next - '0';
100			else if (*next >= 'a' && *next <= 'z')
101				d = *next - 'a' + 10;
102			else {
103				assert(*next >= 'A' && *next <= 'Z');
104				d = *next - 'A' + 10;
105			}
106			if (d >= base) {
107				m4_warnx("error in number %s", yytext);
108				return 0;
109			}
110			l = base * l + d;
111			next++;
112		}
113	}
114	return l;
115}
116
117