Annotation of mandoc/compat_strtonum.c, Revision 1.2
1.2 ! schwarze 1: /* $Id: compat_strtonum.c,v 1.1 2015/02/16 14:56:22 schwarze Exp $ */
! 2: /* $OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther Exp $ */
1.1 schwarze 3:
4: /*
5: * Copyright (c) 2004 Ted Unangst and Todd Miller
6: * All rights reserved.
7: *
8: * Permission to use, copy, modify, and distribute this software for any
9: * purpose with or without fee is hereby granted, provided that the above
10: * copyright notice and this permission notice appear in all copies.
11: *
12: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19: */
1.2 ! schwarze 20: #include "config.h"
1.1 schwarze 21:
22: #include <errno.h>
23: #include <limits.h>
24: #include <stdlib.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: int error = 0;
36: char *ep;
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: }
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