1 90fbce40 2021-11-25 op /*
 2 90fbce40 2021-11-25 op  * Copyright (c) 2004 Ted Unangst and Todd Miller
 3 90fbce40 2021-11-25 op  * All rights reserved.
 4 90fbce40 2021-11-25 op  *
 5 90fbce40 2021-11-25 op  * Permission to use, copy, modify, and distribute this software for any
 6 90fbce40 2021-11-25 op  * purpose with or without fee is hereby granted, provided that the above
 7 90fbce40 2021-11-25 op  * copyright notice and this permission notice appear in all copies.
 8 90fbce40 2021-11-25 op  *
 9 90fbce40 2021-11-25 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 90fbce40 2021-11-25 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 90fbce40 2021-11-25 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 90fbce40 2021-11-25 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 90fbce40 2021-11-25 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 90fbce40 2021-11-25 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 90fbce40 2021-11-25 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 90fbce40 2021-11-25 op  */
17 90fbce40 2021-11-25 op 
18 90fbce40 2021-11-25 op #include <errno.h>
19 90fbce40 2021-11-25 op #include <limits.h>
20 90fbce40 2021-11-25 op #include <stdlib.h>
21 90fbce40 2021-11-25 op 
22 90fbce40 2021-11-25 op #define	INVALID		1
23 90fbce40 2021-11-25 op #define	TOOSMALL	2
24 90fbce40 2021-11-25 op #define	TOOLARGE	3
25 90fbce40 2021-11-25 op 
26 90fbce40 2021-11-25 op long long
27 90fbce40 2021-11-25 op strtonum(const char *numstr, long long minval, long long maxval,
28 90fbce40 2021-11-25 op     const char **errstrp)
29 90fbce40 2021-11-25 op {
30 90fbce40 2021-11-25 op 	long long ll = 0;
31 90fbce40 2021-11-25 op 	int error = 0;
32 90fbce40 2021-11-25 op 	char *ep;
33 90fbce40 2021-11-25 op 	struct errval {
34 90fbce40 2021-11-25 op 		const char *errstr;
35 90fbce40 2021-11-25 op 		int err;
36 90fbce40 2021-11-25 op 	} ev[4] = {
37 90fbce40 2021-11-25 op 		{ NULL,		0 },
38 90fbce40 2021-11-25 op 		{ "invalid",	EINVAL },
39 90fbce40 2021-11-25 op 		{ "too small",	ERANGE },
40 90fbce40 2021-11-25 op 		{ "too large",	ERANGE },
41 90fbce40 2021-11-25 op 	};
42 90fbce40 2021-11-25 op 
43 90fbce40 2021-11-25 op 	ev[0].err = errno;
44 90fbce40 2021-11-25 op 	errno = 0;
45 90fbce40 2021-11-25 op 	if (minval > maxval) {
46 90fbce40 2021-11-25 op 		error = INVALID;
47 90fbce40 2021-11-25 op 	} else {
48 90fbce40 2021-11-25 op 		ll = strtoll(numstr, &ep, 10);
49 90fbce40 2021-11-25 op 		if (numstr == ep || *ep != '\0')
50 90fbce40 2021-11-25 op 			error = INVALID;
51 90fbce40 2021-11-25 op 		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
52 90fbce40 2021-11-25 op 			error = TOOSMALL;
53 90fbce40 2021-11-25 op 		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
54 90fbce40 2021-11-25 op 			error = TOOLARGE;
55 90fbce40 2021-11-25 op 	}
56 90fbce40 2021-11-25 op 	if (errstrp != NULL)
57 90fbce40 2021-11-25 op 		*errstrp = ev[error].errstr;
58 90fbce40 2021-11-25 op 	errno = ev[error].err;
59 90fbce40 2021-11-25 op 	if (error)
60 90fbce40 2021-11-25 op 		ll = 0;
61 90fbce40 2021-11-25 op 
62 90fbce40 2021-11-25 op 	return (ll);
63 90fbce40 2021-11-25 op }