1*0a6a1f1dSLionel Sambuc /* $NetBSD: strtonum.c,v 1.4 2015/03/10 12:57:56 christos Exp $ */
2*0a6a1f1dSLionel Sambuc /*-
3*0a6a1f1dSLionel Sambuc * Copyright (c) 2014 The NetBSD Foundation, Inc.
4*0a6a1f1dSLionel Sambuc * All rights reserved.
5*0a6a1f1dSLionel Sambuc *
6*0a6a1f1dSLionel Sambuc * This code is derived from software contributed to The NetBSD Foundation
7*0a6a1f1dSLionel Sambuc * by Christos Zoulas.
8*0a6a1f1dSLionel Sambuc *
9*0a6a1f1dSLionel Sambuc * Redistribution and use in source and binary forms, with or without
10*0a6a1f1dSLionel Sambuc * modification, are permitted provided that the following conditions
11*0a6a1f1dSLionel Sambuc * are met:
12*0a6a1f1dSLionel Sambuc * 1. Redistributions of source code must retain the above copyright
13*0a6a1f1dSLionel Sambuc * notice, this list of conditions and the following disclaimer.
14*0a6a1f1dSLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
15*0a6a1f1dSLionel Sambuc * notice, this list of conditions and the following disclaimer in the
16*0a6a1f1dSLionel Sambuc * documentation and/or other materials provided with the distribution.
17*0a6a1f1dSLionel Sambuc *
18*0a6a1f1dSLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19*0a6a1f1dSLionel Sambuc * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20*0a6a1f1dSLionel Sambuc * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21*0a6a1f1dSLionel Sambuc * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22*0a6a1f1dSLionel Sambuc * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23*0a6a1f1dSLionel Sambuc * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24*0a6a1f1dSLionel Sambuc * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25*0a6a1f1dSLionel Sambuc * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26*0a6a1f1dSLionel Sambuc * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27*0a6a1f1dSLionel Sambuc * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28*0a6a1f1dSLionel Sambuc * POSSIBILITY OF SUCH DAMAGE.
29*0a6a1f1dSLionel Sambuc */
30*0a6a1f1dSLionel Sambuc
31*0a6a1f1dSLionel Sambuc #include <sys/cdefs.h>
32*0a6a1f1dSLionel Sambuc __RCSID("$NetBSD: strtonum.c,v 1.4 2015/03/10 12:57:56 christos Exp $");
33*0a6a1f1dSLionel Sambuc
34*0a6a1f1dSLionel Sambuc #define _OPENBSD_SOURCE
35*0a6a1f1dSLionel Sambuc #include <stdio.h>
36*0a6a1f1dSLionel Sambuc #include <stdlib.h>
37*0a6a1f1dSLionel Sambuc #include <errno.h>
38*0a6a1f1dSLionel Sambuc #include <inttypes.h>
39*0a6a1f1dSLionel Sambuc
40*0a6a1f1dSLionel Sambuc long long
strtonum(const char * nptr,long long minval,long long maxval,const char ** errstr)41*0a6a1f1dSLionel Sambuc strtonum(const char *nptr, long long minval, long long maxval,
42*0a6a1f1dSLionel Sambuc const char **errstr)
43*0a6a1f1dSLionel Sambuc {
44*0a6a1f1dSLionel Sambuc int e;
45*0a6a1f1dSLionel Sambuc long long rv;
46*0a6a1f1dSLionel Sambuc const char *resp;
47*0a6a1f1dSLionel Sambuc
48*0a6a1f1dSLionel Sambuc if (errstr == NULL)
49*0a6a1f1dSLionel Sambuc errstr = &resp;
50*0a6a1f1dSLionel Sambuc
51*0a6a1f1dSLionel Sambuc rv = (long long)strtoi(nptr, NULL, 10, minval, maxval, &e);
52*0a6a1f1dSLionel Sambuc
53*0a6a1f1dSLionel Sambuc if (e == 0) {
54*0a6a1f1dSLionel Sambuc *errstr = NULL;
55*0a6a1f1dSLionel Sambuc return rv;
56*0a6a1f1dSLionel Sambuc }
57*0a6a1f1dSLionel Sambuc
58*0a6a1f1dSLionel Sambuc if (e == ERANGE)
59*0a6a1f1dSLionel Sambuc *errstr = (rv == maxval ? "too large" : "too small");
60*0a6a1f1dSLionel Sambuc else
61*0a6a1f1dSLionel Sambuc *errstr = "invalid";
62*0a6a1f1dSLionel Sambuc
63*0a6a1f1dSLionel Sambuc return 0;
64*0a6a1f1dSLionel Sambuc }
65