1 |
|
|
/* $OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther 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 |
|
|
long long |
29 |
|
|
strtonum(const char *numstr, long long minval, long long maxval, |
30 |
|
|
const char **errstrp) |
31 |
|
|
{ |
32 |
|
|
long long ll = 0; |
33 |
|
|
int error = 0; |
34 |
|
2600 |
char *ep; |
35 |
|
1300 |
struct errval { |
36 |
|
|
const char *errstr; |
37 |
|
|
int err; |
38 |
|
1300 |
} ev[4] = { |
39 |
|
|
{ NULL, 0 }, |
40 |
|
|
{ "invalid", EINVAL }, |
41 |
|
|
{ "too small", ERANGE }, |
42 |
|
|
{ "too large", ERANGE }, |
43 |
|
|
}; |
44 |
|
|
|
45 |
|
1300 |
ev[0].err = errno; |
46 |
|
1300 |
errno = 0; |
47 |
✗✓ |
1300 |
if (minval > maxval) { |
48 |
|
|
error = INVALID; |
49 |
|
|
} else { |
50 |
|
1300 |
ll = strtoll(numstr, &ep, 10); |
51 |
✓✓✗✓
|
2580 |
if (numstr == ep || *ep != '\0') |
52 |
|
20 |
error = INVALID; |
53 |
✗✓✗✗
✗✓ |
2560 |
else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval) |
54 |
|
|
error = TOOSMALL; |
55 |
✗✓✗✗
✗✓ |
2560 |
else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval) |
56 |
|
|
error = TOOLARGE; |
57 |
|
|
} |
58 |
✓✓ |
1300 |
if (errstrp != NULL) |
59 |
|
1130 |
*errstrp = ev[error].errstr; |
60 |
|
1300 |
errno = ev[error].err; |
61 |
✓✓ |
1300 |
if (error) |
62 |
|
20 |
ll = 0; |
63 |
|
|
|
64 |
|
1300 |
return (ll); |
65 |
|
1300 |
} |
66 |
|
|
DEF_WEAK(strtonum); |