Annotation of embedaddon/mrouted/strtonum.c, revision 1.1.1.1
1.1 misho 1: /* $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $ */
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:
20: #include <errno.h>
21: #include <limits.h>
22: #include <stdlib.h>
23:
24: #define INVALID 1
25: #define TOOSMALL 2
26: #define TOOLARGE 3
27:
28: /* Not defined in GLIBC */
29: #ifndef LLONG_MAX
30: # define LLONG_MAX 0x7fffffffffffffffLL
31: #endif
32:
33: #ifndef LLONG_MIN
34: # define LLONG_MIN (-0x7fffffffffffffffLL-1)
35: #endif
36:
37: long long
38: strtonum(const char *numstr, long long minval, long long maxval,
39: const char **errstrp)
40: {
41: long long ll = 0;
42: char *ep;
43: int error = 0;
44: struct errval {
45: const char *errstr;
46: int err;
47: } ev[4] = {
48: { NULL, 0 },
49: { "invalid", EINVAL },
50: { "too small", ERANGE },
51: { "too large", ERANGE },
52: };
53:
54: ev[0].err = errno;
55: errno = 0;
56: if (minval > maxval)
57: error = INVALID;
58: else {
59: ll = strtoll(numstr, &ep, 10);
60: if (numstr == ep || *ep != '\0')
61: error = INVALID;
62: else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
63: error = TOOSMALL;
64: else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
65: error = TOOLARGE;
66: }
67: if (errstrp != NULL)
68: *errstrp = ev[error].errstr;
69: errno = ev[error].err;
70: if (error)
71: ll = 0;
72:
73: return (ll);
74: }
75:
76: /**
77: * Local Variables:
78: * version-control: t
79: * c-file-style: "bsd"
80: * End:
81: */
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