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181e6f32 | 1 | /* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */ |
2 | ||
3 | /* $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $ */ | |
4 | ||
5 | /* | |
6 | * Copyright (c) 2004 Ted Unangst and Todd Miller | |
7 | * All rights reserved. | |
8 | * | |
9 | * Permission to use, copy, modify, and distribute this software for any | |
10 | * purpose with or without fee is hereby granted, provided that the above | |
11 | * copyright notice and this permission notice appear in all copies. | |
12 | * | |
13 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
19 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
20 | */ | |
21 | ||
22 | #include "includes.h" | |
23 | #ifndef HAVE_STRTONUM | |
24 | #include <limits.h> | |
25 | ||
26 | #define INVALID 1 | |
27 | #define TOOSMALL 2 | |
28 | #define TOOLARGE 3 | |
29 | ||
30 | long long | |
31 | strtonum(const char *numstr, long long minval, long long maxval, | |
32 | const char **errstrp) | |
33 | { | |
34 | long long ll = 0; | |
35 | char *ep; | |
36 | int error = 0; | |
37 | struct errval { | |
38 | const char *errstr; | |
39 | int err; | |
40 | } ev[4] = { | |
41 | { NULL, 0 }, | |
42 | { "invalid", EINVAL }, | |
43 | { "too small", ERANGE }, | |
44 | { "too large", ERANGE }, | |
45 | }; | |
46 | ||
47 | ev[0].err = errno; | |
48 | errno = 0; | |
49 | if (minval > maxval) | |
50 | error = INVALID; | |
51 | else { | |
52 | ll = strtoll(numstr, &ep, 10); | |
53 | if (numstr == ep || *ep != '\0') | |
54 | error = INVALID; | |
55 | else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval) | |
56 | error = TOOSMALL; | |
57 | else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval) | |
58 | error = TOOLARGE; | |
59 | } | |
60 | if (errstrp != NULL) | |
61 | *errstrp = ev[error].errstr; | |
62 | errno = ev[error].err; | |
63 | if (error) | |
64 | ll = 0; | |
65 | ||
66 | return (ll); | |
67 | } | |
68 | ||
69 | #endif /* HAVE_STRTONUM */ |