1 0d6fb46a 2022-01-09 op /*
 2 0d6fb46a 2022-01-09 op  * Copyright (c) 2004 Ted Unangst and Todd Miller
 3 0d6fb46a 2022-01-09 op  * All rights reserved.
 4 0d6fb46a 2022-01-09 op  *
 5 0d6fb46a 2022-01-09 op  * Permission to use, copy, modify, and distribute this software for any
 6 0d6fb46a 2022-01-09 op  * purpose with or without fee is hereby granted, provided that the above
 7 0d6fb46a 2022-01-09 op  * copyright notice and this permission notice appear in all copies.
 8 0d6fb46a 2022-01-09 op  *
 9 0d6fb46a 2022-01-09 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 0d6fb46a 2022-01-09 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 0d6fb46a 2022-01-09 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 0d6fb46a 2022-01-09 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 0d6fb46a 2022-01-09 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 0d6fb46a 2022-01-09 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 0d6fb46a 2022-01-09 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 0d6fb46a 2022-01-09 op  */
17 0d6fb46a 2022-01-09 op 
18 0d6fb46a 2022-01-09 op #include <errno.h>
19 0d6fb46a 2022-01-09 op #include <limits.h>
20 0d6fb46a 2022-01-09 op #include <stdlib.h>
21 0d6fb46a 2022-01-09 op 
22 0d6fb46a 2022-01-09 op #include "compat.h"
23 0d6fb46a 2022-01-09 op 
24 0d6fb46a 2022-01-09 op #define	INVALID		1
25 0d6fb46a 2022-01-09 op #define	TOOSMALL	2
26 0d6fb46a 2022-01-09 op #define	TOOLARGE	3
27 0d6fb46a 2022-01-09 op 
28 0d6fb46a 2022-01-09 op long long
29 0d6fb46a 2022-01-09 op strtonum(const char *numstr, long long minval, long long maxval,
30 0d6fb46a 2022-01-09 op     const char **errstrp)
31 0d6fb46a 2022-01-09 op {
32 0d6fb46a 2022-01-09 op 	long long ll = 0;
33 0d6fb46a 2022-01-09 op 	int error = 0;
34 0d6fb46a 2022-01-09 op 	char *ep;
35 0d6fb46a 2022-01-09 op 	struct errval {
36 0d6fb46a 2022-01-09 op 		const char *errstr;
37 0d6fb46a 2022-01-09 op 		int err;
38 0d6fb46a 2022-01-09 op 	} ev[4] = {
39 0d6fb46a 2022-01-09 op 		{ NULL,		0 },
40 0d6fb46a 2022-01-09 op 		{ "invalid",	EINVAL },
41 0d6fb46a 2022-01-09 op 		{ "too small",	ERANGE },
42 0d6fb46a 2022-01-09 op 		{ "too large",	ERANGE },
43 0d6fb46a 2022-01-09 op 	};
44 0d6fb46a 2022-01-09 op 
45 0d6fb46a 2022-01-09 op 	ev[0].err = errno;
46 0d6fb46a 2022-01-09 op 	errno = 0;
47 0d6fb46a 2022-01-09 op 	if (minval > maxval) {
48 0d6fb46a 2022-01-09 op 		error = INVALID;
49 0d6fb46a 2022-01-09 op 	} else {
50 0d6fb46a 2022-01-09 op 		ll = strtoll(numstr, &ep, 10);
51 0d6fb46a 2022-01-09 op 		if (numstr == ep || *ep != '\0')
52 0d6fb46a 2022-01-09 op 			error = INVALID;
53 0d6fb46a 2022-01-09 op 		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
54 0d6fb46a 2022-01-09 op 			error = TOOSMALL;
55 0d6fb46a 2022-01-09 op 		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
56 0d6fb46a 2022-01-09 op 			error = TOOLARGE;
57 0d6fb46a 2022-01-09 op 	}
58 0d6fb46a 2022-01-09 op 	if (errstrp != NULL)
59 0d6fb46a 2022-01-09 op 		*errstrp = ev[error].errstr;
60 0d6fb46a 2022-01-09 op 	errno = ev[error].err;
61 0d6fb46a 2022-01-09 op 	if (error)
62 0d6fb46a 2022-01-09 op 		ll = 0;
63 0d6fb46a 2022-01-09 op 
64 0d6fb46a 2022-01-09 op 	return (ll);
65 0d6fb46a 2022-01-09 op }