1 15503fe5 2022-03-19 op /*	$OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther Exp $	*/
 2 15503fe5 2022-03-19 op 
 3 b0003f58 2021-03-08 op /*
 4 b0003f58 2021-03-08 op  * Copyright (c) 2004 Ted Unangst and Todd Miller
 5 b0003f58 2021-03-08 op  * All rights reserved.
 6 b0003f58 2021-03-08 op  *
 7 b0003f58 2021-03-08 op  * Permission to use, copy, modify, and distribute this software for any
 8 b0003f58 2021-03-08 op  * purpose with or without fee is hereby granted, provided that the above
 9 b0003f58 2021-03-08 op  * copyright notice and this permission notice appear in all copies.
10 b0003f58 2021-03-08 op  *
11 b0003f58 2021-03-08 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 b0003f58 2021-03-08 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 b0003f58 2021-03-08 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 b0003f58 2021-03-08 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 b0003f58 2021-03-08 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 b0003f58 2021-03-08 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 b0003f58 2021-03-08 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 b0003f58 2021-03-08 op  */
19 b0003f58 2021-03-08 op 
20 b0003f58 2021-03-08 op #include <errno.h>
21 b0003f58 2021-03-08 op #include <limits.h>
22 b0003f58 2021-03-08 op #include <stdlib.h>
23 b0003f58 2021-03-08 op 
24 d2742f99 2021-03-17 op #include "compat.h"
25 b0003f58 2021-03-08 op 
26 b0003f58 2021-03-08 op #define	INVALID		1
27 b0003f58 2021-03-08 op #define	TOOSMALL	2
28 b0003f58 2021-03-08 op #define	TOOLARGE	3
29 b0003f58 2021-03-08 op 
30 b0003f58 2021-03-08 op long long
31 b0003f58 2021-03-08 op strtonum(const char *numstr, long long minval, long long maxval,
32 b0003f58 2021-03-08 op     const char **errstrp)
33 b0003f58 2021-03-08 op {
34 b0003f58 2021-03-08 op 	long long ll = 0;
35 b0003f58 2021-03-08 op 	int error = 0;
36 b0003f58 2021-03-08 op 	char *ep;
37 b0003f58 2021-03-08 op 	struct errval {
38 b0003f58 2021-03-08 op 		const char *errstr;
39 b0003f58 2021-03-08 op 		int err;
40 b0003f58 2021-03-08 op 	} ev[4] = {
41 b0003f58 2021-03-08 op 		{ NULL,		0 },
42 b0003f58 2021-03-08 op 		{ "invalid",	EINVAL },
43 b0003f58 2021-03-08 op 		{ "too small",	ERANGE },
44 b0003f58 2021-03-08 op 		{ "too large",	ERANGE },
45 b0003f58 2021-03-08 op 	};
46 b0003f58 2021-03-08 op 
47 b0003f58 2021-03-08 op 	ev[0].err = errno;
48 b0003f58 2021-03-08 op 	errno = 0;
49 b0003f58 2021-03-08 op 	if (minval > maxval) {
50 b0003f58 2021-03-08 op 		error = INVALID;
51 b0003f58 2021-03-08 op 	} else {
52 b0003f58 2021-03-08 op 		ll = strtoll(numstr, &ep, 10);
53 b0003f58 2021-03-08 op 		if (numstr == ep || *ep != '\0')
54 b0003f58 2021-03-08 op 			error = INVALID;
55 b0003f58 2021-03-08 op 		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
56 b0003f58 2021-03-08 op 			error = TOOSMALL;
57 b0003f58 2021-03-08 op 		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
58 b0003f58 2021-03-08 op 			error = TOOLARGE;
59 b0003f58 2021-03-08 op 	}
60 b0003f58 2021-03-08 op 	if (errstrp != NULL)
61 b0003f58 2021-03-08 op 		*errstrp = ev[error].errstr;
62 b0003f58 2021-03-08 op 	errno = ev[error].err;
63 b0003f58 2021-03-08 op 	if (error)
64 b0003f58 2021-03-08 op 		ll = 0;
65 b0003f58 2021-03-08 op 
66 b0003f58 2021-03-08 op 	return (ll);
67 b0003f58 2021-03-08 op }