1149749Sdes/*	$OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $	*/
2149749Sdes
3149749Sdes/*
4149749Sdes * Copyright (c) 2004 Ted Unangst and Todd Miller
5149749Sdes * All rights reserved.
6149749Sdes *
7149749Sdes * Permission to use, copy, modify, and distribute this software for any
8149749Sdes * purpose with or without fee is hereby granted, provided that the above
9149749Sdes * copyright notice and this permission notice appear in all copies.
10149749Sdes *
11149749Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12149749Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13149749Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14149749Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15149749Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16149749Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17149749Sdes * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18149749Sdes */
19149749Sdes
20157016Sdes/* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */
21157016Sdes
22149749Sdes#include "includes.h"
23162852Sdes
24149749Sdes#ifndef HAVE_STRTONUM
25162852Sdes#include <stdlib.h>
26149749Sdes#include <limits.h>
27162852Sdes#include <errno.h>
28149749Sdes
29149749Sdes#define INVALID 	1
30149749Sdes#define TOOSMALL 	2
31149749Sdes#define TOOLARGE 	3
32149749Sdes
33149749Sdeslong long
34149749Sdesstrtonum(const char *numstr, long long minval, long long maxval,
35149749Sdes    const char **errstrp)
36149749Sdes{
37149749Sdes	long long ll = 0;
38149749Sdes	char *ep;
39149749Sdes	int error = 0;
40149749Sdes	struct errval {
41149749Sdes		const char *errstr;
42149749Sdes		int err;
43149749Sdes	} ev[4] = {
44149749Sdes		{ NULL,		0 },
45149749Sdes		{ "invalid",	EINVAL },
46149749Sdes		{ "too small",	ERANGE },
47149749Sdes		{ "too large",	ERANGE },
48149749Sdes	};
49149749Sdes
50149749Sdes	ev[0].err = errno;
51149749Sdes	errno = 0;
52149749Sdes	if (minval > maxval)
53149749Sdes		error = INVALID;
54149749Sdes	else {
55149749Sdes		ll = strtoll(numstr, &ep, 10);
56149749Sdes		if (numstr == ep || *ep != '\0')
57149749Sdes			error = INVALID;
58149749Sdes		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
59149749Sdes			error = TOOSMALL;
60149749Sdes		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
61149749Sdes			error = TOOLARGE;
62149749Sdes	}
63149749Sdes	if (errstrp != NULL)
64149749Sdes		*errstrp = ev[error].errstr;
65149749Sdes	errno = ev[error].err;
66149749Sdes	if (error)
67149749Sdes		ll = 0;
68149749Sdes
69149749Sdes	return (ll);
70149749Sdes}
71149749Sdes
72149749Sdes#endif /* HAVE_STRTONUM */
73