1 babf5d5a 2021-05-11 martijn /*	$OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $	*/
 2 babf5d5a 2021-05-11 martijn 
 3 babf5d5a 2021-05-11 martijn /*
 4 babf5d5a 2021-05-11 martijn  * Copyright (c) 2004 Ted Unangst and Todd Miller
 5 babf5d5a 2021-05-11 martijn  * All rights reserved.
 6 babf5d5a 2021-05-11 martijn  *
 7 babf5d5a 2021-05-11 martijn  * Permission to use, copy, modify, and distribute this software for any
 8 babf5d5a 2021-05-11 martijn  * purpose with or without fee is hereby granted, provided that the above
 9 babf5d5a 2021-05-11 martijn  * copyright notice and this permission notice appear in all copies.
10 babf5d5a 2021-05-11 martijn  *
11 babf5d5a 2021-05-11 martijn  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 babf5d5a 2021-05-11 martijn  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 babf5d5a 2021-05-11 martijn  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 babf5d5a 2021-05-11 martijn  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 babf5d5a 2021-05-11 martijn  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 babf5d5a 2021-05-11 martijn  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 babf5d5a 2021-05-11 martijn  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 babf5d5a 2021-05-11 martijn  */
19 babf5d5a 2021-05-11 martijn 
20 babf5d5a 2021-05-11 martijn /* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */
21 babf5d5a 2021-05-11 martijn 
22 babf5d5a 2021-05-11 martijn #include "openbsd-compat.h"
23 babf5d5a 2021-05-11 martijn 
24 babf5d5a 2021-05-11 martijn #ifndef HAVE_STRTONUM
25 babf5d5a 2021-05-11 martijn #include <stdlib.h>
26 babf5d5a 2021-05-11 martijn #include <limits.h>
27 babf5d5a 2021-05-11 martijn #include <errno.h>
28 babf5d5a 2021-05-11 martijn 
29 babf5d5a 2021-05-11 martijn #define INVALID 	1
30 babf5d5a 2021-05-11 martijn #define TOOSMALL 	2
31 babf5d5a 2021-05-11 martijn #define TOOLARGE 	3
32 babf5d5a 2021-05-11 martijn 
33 babf5d5a 2021-05-11 martijn long long
34 babf5d5a 2021-05-11 martijn strtonum(const char *numstr, long long minval, long long maxval,
35 babf5d5a 2021-05-11 martijn     const char **errstrp)
36 babf5d5a 2021-05-11 martijn {
37 babf5d5a 2021-05-11 martijn 	long long ll = 0;
38 babf5d5a 2021-05-11 martijn 	char *ep;
39 babf5d5a 2021-05-11 martijn 	int error = 0;
40 babf5d5a 2021-05-11 martijn 	struct errval {
41 babf5d5a 2021-05-11 martijn 		const char *errstr;
42 babf5d5a 2021-05-11 martijn 		int err;
43 babf5d5a 2021-05-11 martijn 	} ev[4] = {
44 babf5d5a 2021-05-11 martijn 		{ NULL,		0 },
45 babf5d5a 2021-05-11 martijn 		{ "invalid",	EINVAL },
46 babf5d5a 2021-05-11 martijn 		{ "too small",	ERANGE },
47 babf5d5a 2021-05-11 martijn 		{ "too large",	ERANGE },
48 babf5d5a 2021-05-11 martijn 	};
49 babf5d5a 2021-05-11 martijn 
50 babf5d5a 2021-05-11 martijn 	ev[0].err = errno;
51 babf5d5a 2021-05-11 martijn 	errno = 0;
52 babf5d5a 2021-05-11 martijn 	if (minval > maxval)
53 babf5d5a 2021-05-11 martijn 		error = INVALID;
54 babf5d5a 2021-05-11 martijn 	else {
55 babf5d5a 2021-05-11 martijn 		ll = strtoll(numstr, &ep, 10);
56 babf5d5a 2021-05-11 martijn 		if (numstr == ep || *ep != '\0')
57 babf5d5a 2021-05-11 martijn 			error = INVALID;
58 babf5d5a 2021-05-11 martijn 		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
59 babf5d5a 2021-05-11 martijn 			error = TOOSMALL;
60 babf5d5a 2021-05-11 martijn 		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
61 babf5d5a 2021-05-11 martijn 			error = TOOLARGE;
62 babf5d5a 2021-05-11 martijn 	}
63 babf5d5a 2021-05-11 martijn 	if (errstrp != NULL)
64 babf5d5a 2021-05-11 martijn 		*errstrp = ev[error].errstr;
65 babf5d5a 2021-05-11 martijn 	errno = ev[error].err;
66 babf5d5a 2021-05-11 martijn 	if (error)
67 babf5d5a 2021-05-11 martijn 		ll = 0;
68 babf5d5a 2021-05-11 martijn 
69 babf5d5a 2021-05-11 martijn 	return (ll);
70 babf5d5a 2021-05-11 martijn }
71 babf5d5a 2021-05-11 martijn 
72 babf5d5a 2021-05-11 martijn #endif /* HAVE_STRTONUM */