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#include "parser.h"
20#include <assert.h>
21#include <stdlib.h>
22#include <errno.h>
23#include <stdint.h>
24#include <limits.h>
25
26extern void m4_warnx(const char *, ...);
27extern int mimic_gnu;
28extern int32_t yylval;
29
30int32_t number(void);
31int32_t parse_radix(void);
32extern int yylex(void);
33
34#define	YY_DECL	int yylex(void)
35%}
36
37delim 	[ \t\n]
38ws	{delim}+
39hex	0[xX][0-9a-fA-F]+
40oct	0[0-7]*
41dec	[1-9][0-9]*
42radix	0[rR][0-9]+:[0-9a-zA-Z]+
43
44%option noyywrap
45
46%%
47{ws}			{/* just skip it */}
48{hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }
49{radix}			{ if (mimic_gnu) {
50				yylval = parse_radix(); return(NUMBER);
51			  } else {
52			  	return(ERROR);
53			  }
54			}
55"<="			{ return(LE); }
56">="			{ return(GE); }
57"<<"			{ return(LSHIFT); }
58">>"			{ return(RSHIFT); }
59"=="			{ return(EQ); }
60"!="			{ return(NE); }
61"&&"			{ return(LAND); }
62"||"			{ return(LOR); }
63"**"			{ if (mimic_gnu) { return (EXPONENT); } }
64.			{ return yytext[0]; }
65%%
66
67int32_t
68number(void)
69{
70	long l;
71
72	errno = 0;
73	l = strtol(yytext, NULL, 0);
74	if (((l == LONG_MAX || l == LONG_MIN) && errno == ERANGE) ||
75	    l > INT32_MAX || l < INT32_MIN) {
76		m4_warnx("numeric overflow in expr: %s", yytext);
77	}
78	return l;
79}
80
81int32_t
82parse_radix(void)
83{
84	long base;
85	char *next;
86	long l;
87	int d;
88
89	l = 0;
90	base = strtol(yytext+2, &next, 0);
91	if (base > 36 || next == NULL) {
92		m4_warnx("error in number %s", yytext);
93	} else {
94		next++;
95		while (*next != 0) {
96			if (*next >= '0' && *next <= '9')
97				d = *next - '0';
98			else if (*next >= 'a' && *next <= 'z')
99				d = *next - 'a' + 10;
100			else {
101				assert(*next >= 'A' && *next <= 'Z');
102				d = *next - 'A' + 10;
103			}
104			if (d >= base) {
105				m4_warnx("error in number %s", yytext);
106				return 0;
107			}
108			l = base * l + d;
109			next++;
110		}
111	}
112	return l;
113}
114
115