strtonum.c revision 157016 
1294113Sbapt/*	$OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $	*/
2241675Suqs
3294113Sbapt/*
4241675Suqs * Copyright (c) 2004 Ted Unangst and Todd Miller
5241675Suqs * All rights reserved.
6241675Suqs *
7241675Suqs * Permission to use, copy, modify, and distribute this software for any
8241675Suqs * purpose with or without fee is hereby granted, provided that the above
9241675Suqs * copyright notice and this permission notice appear in all copies.
10241675Suqs *
11241675Suqs * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12241675Suqs * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13241675Suqs * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14241675Suqs * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15241675Suqs * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16241675Suqs * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17241675Suqs * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18241675Suqs */
19275432Sbapt
20275432Sbapt/* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */
21261344Suqs
22241675Suqs#include "includes.h"
23241675Suqs#ifndef HAVE_STRTONUM
24241675Suqs#include <limits.h>
25294113Sbapt
26241675Suqs#define INVALID 	1
27294113Sbapt#define TOOSMALL 	2
28294113Sbapt#define TOOLARGE 	3
29294113Sbapt
30261344Suqslong long
31241675Suqsstrtonum(const char *numstr, long long minval, long long maxval,
32241675Suqs    const char **errstrp)
33294113Sbapt{
34241675Suqs	long long ll = 0;
35241675Suqs	char *ep;
36241675Suqs	int error = 0;
37241675Suqs	struct errval {
38241675Suqs		const char *errstr;
39241675Suqs		int err;
40241675Suqs	} ev[4] = {
41241675Suqs		{ NULL,		0 },
42241675Suqs		{ "invalid",	EINVAL },
43241675Suqs		{ "too small",	ERANGE },
44241675Suqs		{ "too large",	ERANGE },
45261344Suqs	};
46261344Suqs
47261344Suqs	ev[0].err = errno;
48261344Suqs	errno = 0;
49275432Sbapt	if (minval > maxval)
50241675Suqs		error = INVALID;
51261344Suqs	else {
52261344Suqs		ll = strtoll(numstr, &ep, 10);
53261344Suqs		if (numstr == ep || *ep != '\0')
54241675Suqs			error = INVALID;
55274880Sbapt		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
56241675Suqs			error = TOOSMALL;
57261344Suqs		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
58261344Suqs			error = TOOLARGE;
59261344Suqs	}
60261344Suqs	if (errstrp != NULL)
61261344Suqs		*errstrp = ev[error].errstr;
62261344Suqs	errno = ev[error].err;
63261344Suqs	if (error)
64261344Suqs		ll = 0;
65261344Suqs
66261344Suqs	return (ll);
67241675Suqs}
68241675Suqs
69241675Suqs#endif /* HAVE_STRTONUM */
70241675Suqs