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strtonum.c (2185B) | |
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1 /* $OpenBSD: strtonum.c,v 1.7 2013/04/17 18:40:58 tedu 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 WARRANT… | |
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F… | |
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 … | |
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 #include "../util.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 < mi… | |
56 error = TOOSMALL; | |
57 else if ((ll == LLONG_MAX && errno == ERANGE) || ll > ma… | |
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 long long | |
70 enstrtonum(int status, const char *numstr, long long minval, long long m… | |
71 { | |
72 const char *errstr; | |
73 long long ll; | |
74 | |
75 ll = strtonum(numstr, minval, maxval, &errstr); | |
76 if (errstr) | |
77 enprintf(status, "strtonum %s: %s\n", numstr, errstr); | |
78 return ll; | |
79 } | |
80 | |
81 long long | |
82 estrtonum(const char *numstr, long long minval, long long maxval) | |
83 { | |
84 return enstrtonum(1, numstr, minval, maxval); | |
85 } |