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