1 bbcba3ed 2022-01-10 op /*
 2 bbcba3ed 2022-01-10 op  * Copyright (c) 2004 Ted Unangst and Todd Miller
 3 bbcba3ed 2022-01-10 op  * All rights reserved.
 4 bbcba3ed 2022-01-10 op  *
 5 bbcba3ed 2022-01-10 op  * Permission to use, copy, modify, and distribute this software for any
 6 bbcba3ed 2022-01-10 op  * purpose with or without fee is hereby granted, provided that the above
 7 bbcba3ed 2022-01-10 op  * copyright notice and this permission notice appear in all copies.
 8 bbcba3ed 2022-01-10 op  *
 9 bbcba3ed 2022-01-10 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 bbcba3ed 2022-01-10 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 bbcba3ed 2022-01-10 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 bbcba3ed 2022-01-10 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 bbcba3ed 2022-01-10 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 bbcba3ed 2022-01-10 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 bbcba3ed 2022-01-10 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 bbcba3ed 2022-01-10 op  */
17 bbcba3ed 2022-01-10 op 
18 bbcba3ed 2022-01-10 op #include <errno.h>
19 bbcba3ed 2022-01-10 op #include <limits.h>
20 bbcba3ed 2022-01-10 op #include <stdlib.h>
21 bbcba3ed 2022-01-10 op 
22 bbcba3ed 2022-01-10 op #include "compat.h"
23 bbcba3ed 2022-01-10 op 
24 bbcba3ed 2022-01-10 op #define	INVALID		1
25 bbcba3ed 2022-01-10 op #define	TOOSMALL	2
26 bbcba3ed 2022-01-10 op #define	TOOLARGE	3
27 bbcba3ed 2022-01-10 op 
28 bbcba3ed 2022-01-10 op long long
29 bbcba3ed 2022-01-10 op strtonum(const char *numstr, long long minval, long long maxval,
30 bbcba3ed 2022-01-10 op     const char **errstrp)
31 bbcba3ed 2022-01-10 op {
32 bbcba3ed 2022-01-10 op 	long long ll = 0;
33 bbcba3ed 2022-01-10 op 	int error = 0;
34 bbcba3ed 2022-01-10 op 	char *ep;
35 bbcba3ed 2022-01-10 op 	struct errval {
36 bbcba3ed 2022-01-10 op 		const char *errstr;
37 bbcba3ed 2022-01-10 op 		int err;
38 bbcba3ed 2022-01-10 op 	} ev[4] = {
39 bbcba3ed 2022-01-10 op 		{ NULL,		0 },
40 bbcba3ed 2022-01-10 op 		{ "invalid",	EINVAL },
41 bbcba3ed 2022-01-10 op 		{ "too small",	ERANGE },
42 bbcba3ed 2022-01-10 op 		{ "too large",	ERANGE },
43 bbcba3ed 2022-01-10 op 	};
44 bbcba3ed 2022-01-10 op 
45 bbcba3ed 2022-01-10 op 	ev[0].err = errno;
46 bbcba3ed 2022-01-10 op 	errno = 0;
47 bbcba3ed 2022-01-10 op 	if (minval > maxval) {
48 bbcba3ed 2022-01-10 op 		error = INVALID;
49 bbcba3ed 2022-01-10 op 	} else {
50 bbcba3ed 2022-01-10 op 		ll = strtoll(numstr, &ep, 10);
51 bbcba3ed 2022-01-10 op 		if (numstr == ep || *ep != '\0')
52 bbcba3ed 2022-01-10 op 			error = INVALID;
53 bbcba3ed 2022-01-10 op 		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
54 bbcba3ed 2022-01-10 op 			error = TOOSMALL;
55 bbcba3ed 2022-01-10 op 		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
56 bbcba3ed 2022-01-10 op 			error = TOOLARGE;
57 bbcba3ed 2022-01-10 op 	}
58 bbcba3ed 2022-01-10 op 	if (errstrp != NULL)
59 bbcba3ed 2022-01-10 op 		*errstrp = ev[error].errstr;
60 bbcba3ed 2022-01-10 op 	errno = ev[error].err;
61 bbcba3ed 2022-01-10 op 	if (error)
62 bbcba3ed 2022-01-10 op 		ll = 0;
63 bbcba3ed 2022-01-10 op 
64 bbcba3ed 2022-01-10 op 	return (ll);
65 bbcba3ed 2022-01-10 op }