1 83f0f95a 2022-09-29 op /*
 2 83f0f95a 2022-09-29 op  * Copyright (c) 2004 Ted Unangst and Todd Miller
 3 83f0f95a 2022-09-29 op  * All rights reserved.
 4 83f0f95a 2022-09-29 op  *
 5 83f0f95a 2022-09-29 op  * Permission to use, copy, modify, and distribute this software for any
 6 83f0f95a 2022-09-29 op  * purpose with or without fee is hereby granted, provided that the above
 7 83f0f95a 2022-09-29 op  * copyright notice and this permission notice appear in all copies.
 8 83f0f95a 2022-09-29 op  *
 9 83f0f95a 2022-09-29 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 83f0f95a 2022-09-29 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 83f0f95a 2022-09-29 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 83f0f95a 2022-09-29 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 83f0f95a 2022-09-29 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 83f0f95a 2022-09-29 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 83f0f95a 2022-09-29 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 83f0f95a 2022-09-29 op  */
17 83f0f95a 2022-09-29 op 
18 83f0f95a 2022-09-29 op #include <errno.h>
19 83f0f95a 2022-09-29 op #include <limits.h>
20 83f0f95a 2022-09-29 op #include <stdlib.h>
21 83f0f95a 2022-09-29 op 
22 83f0f95a 2022-09-29 op #define	INVALID		1
23 83f0f95a 2022-09-29 op #define	TOOSMALL	2
24 83f0f95a 2022-09-29 op #define	TOOLARGE	3
25 83f0f95a 2022-09-29 op 
26 83f0f95a 2022-09-29 op long long
27 83f0f95a 2022-09-29 op strtonum(const char *numstr, long long minval, long long maxval,
28 83f0f95a 2022-09-29 op     const char **errstrp)
29 83f0f95a 2022-09-29 op {
30 83f0f95a 2022-09-29 op 	long long ll = 0;
31 83f0f95a 2022-09-29 op 	int error = 0;
32 83f0f95a 2022-09-29 op 	char *ep;
33 83f0f95a 2022-09-29 op 	struct errval {
34 83f0f95a 2022-09-29 op 		const char *errstr;
35 83f0f95a 2022-09-29 op 		int err;
36 83f0f95a 2022-09-29 op 	} ev[4] = {
37 83f0f95a 2022-09-29 op 		{ NULL,		0 },
38 83f0f95a 2022-09-29 op 		{ "invalid",	EINVAL },
39 83f0f95a 2022-09-29 op 		{ "too small",	ERANGE },
40 83f0f95a 2022-09-29 op 		{ "too large",	ERANGE },
41 83f0f95a 2022-09-29 op 	};
42 83f0f95a 2022-09-29 op 
43 83f0f95a 2022-09-29 op 	ev[0].err = errno;
44 83f0f95a 2022-09-29 op 	errno = 0;
45 83f0f95a 2022-09-29 op 	if (minval > maxval) {
46 83f0f95a 2022-09-29 op 		error = INVALID;
47 83f0f95a 2022-09-29 op 	} else {
48 83f0f95a 2022-09-29 op 		ll = strtoll(numstr, &ep, 10);
49 83f0f95a 2022-09-29 op 		if (numstr == ep || *ep != '\0')
50 83f0f95a 2022-09-29 op 			error = INVALID;
51 83f0f95a 2022-09-29 op 		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
52 83f0f95a 2022-09-29 op 			error = TOOSMALL;
53 83f0f95a 2022-09-29 op 		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
54 83f0f95a 2022-09-29 op 			error = TOOLARGE;
55 83f0f95a 2022-09-29 op 	}
56 83f0f95a 2022-09-29 op 	if (errstrp != NULL)
57 83f0f95a 2022-09-29 op 		*errstrp = ev[error].errstr;
58 83f0f95a 2022-09-29 op 	errno = ev[error].err;
59 83f0f95a 2022-09-29 op 	if (error)
60 83f0f95a 2022-09-29 op 		ll = 0;
61 83f0f95a 2022-09-29 op 
62 83f0f95a 2022-09-29 op 	return (ll);
63 83f0f95a 2022-09-29 op }