1*df6ad731Slogwang /*-
2*df6ad731Slogwang * Copyright (c) 2004 Ted Unangst and Todd Miller
3*df6ad731Slogwang * All rights reserved.
4*df6ad731Slogwang *
5*df6ad731Slogwang * Permission to use, copy, modify, and distribute this software for any
6*df6ad731Slogwang * purpose with or without fee is hereby granted, provided that the above
7*df6ad731Slogwang * copyright notice and this permission notice appear in all copies.
8*df6ad731Slogwang *
9*df6ad731Slogwang * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10*df6ad731Slogwang * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11*df6ad731Slogwang * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12*df6ad731Slogwang * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13*df6ad731Slogwang * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14*df6ad731Slogwang * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15*df6ad731Slogwang * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16*df6ad731Slogwang *
17*df6ad731Slogwang * $OpenBSD: strtonum.c,v 1.7 2013/04/17 18:40:58 tedu Exp $
18*df6ad731Slogwang */
19*df6ad731Slogwang
20*df6ad731Slogwang #include <sys/cdefs.h>
21*df6ad731Slogwang #ifndef FSTACK
22*df6ad731Slogwang __FBSDID("$FreeBSD$");
23*df6ad731Slogwang #endif
24*df6ad731Slogwang
25*df6ad731Slogwang #include <errno.h>
26*df6ad731Slogwang #include <limits.h>
27*df6ad731Slogwang #include <stdlib.h>
28*df6ad731Slogwang
29*df6ad731Slogwang #include "compat.h"
30*df6ad731Slogwang
31*df6ad731Slogwang #define INVALID 1
32*df6ad731Slogwang #define TOOSMALL 2
33*df6ad731Slogwang #define TOOLARGE 3
34*df6ad731Slogwang
35*df6ad731Slogwang long long
strtonum(const char * numstr,long long minval,long long maxval,const char ** errstrp)36*df6ad731Slogwang strtonum(const char *numstr, long long minval, long long maxval,
37*df6ad731Slogwang const char **errstrp)
38*df6ad731Slogwang {
39*df6ad731Slogwang long long ll = 0;
40*df6ad731Slogwang int error = 0;
41*df6ad731Slogwang char *ep;
42*df6ad731Slogwang struct errval {
43*df6ad731Slogwang const char *errstr;
44*df6ad731Slogwang int err;
45*df6ad731Slogwang } ev[4] = {
46*df6ad731Slogwang { NULL, 0 },
47*df6ad731Slogwang { "invalid", EINVAL },
48*df6ad731Slogwang { "too small", ERANGE },
49*df6ad731Slogwang { "too large", ERANGE },
50*df6ad731Slogwang };
51*df6ad731Slogwang
52*df6ad731Slogwang ev[0].err = errno;
53*df6ad731Slogwang errno = 0;
54*df6ad731Slogwang if (minval > maxval) {
55*df6ad731Slogwang error = INVALID;
56*df6ad731Slogwang } else {
57*df6ad731Slogwang ll = strtoll(numstr, &ep, 10);
58*df6ad731Slogwang if (errno == EINVAL || numstr == ep || *ep != '\0')
59*df6ad731Slogwang error = INVALID;
60*df6ad731Slogwang else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
61*df6ad731Slogwang error = TOOSMALL;
62*df6ad731Slogwang else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
63*df6ad731Slogwang error = TOOLARGE;
64*df6ad731Slogwang }
65*df6ad731Slogwang if (errstrp != NULL)
66*df6ad731Slogwang *errstrp = ev[error].errstr;
67*df6ad731Slogwang errno = ev[error].err;
68*df6ad731Slogwang if (error)
69*df6ad731Slogwang ll = 0;
70*df6ad731Slogwang
71*df6ad731Slogwang return (ll);
72*df6ad731Slogwang }
73