2 90fbce40 2021-11-25 op * Copyright (c) 2004 Ted Unangst and Todd Miller
3 90fbce40 2021-11-25 op * All rights reserved.
5 90fbce40 2021-11-25 op * Permission to use, copy, modify, and distribute this software for any
6 90fbce40 2021-11-25 op * purpose with or without fee is hereby granted, provided that the above
7 90fbce40 2021-11-25 op * copyright notice and this permission notice appear in all copies.
9 90fbce40 2021-11-25 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 90fbce40 2021-11-25 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 90fbce40 2021-11-25 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 90fbce40 2021-11-25 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 90fbce40 2021-11-25 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 90fbce40 2021-11-25 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 90fbce40 2021-11-25 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 90fbce40 2021-11-25 op #include <errno.h>
19 90fbce40 2021-11-25 op #include <limits.h>
20 90fbce40 2021-11-25 op #include <stdlib.h>
22 90fbce40 2021-11-25 op #define INVALID 1
23 90fbce40 2021-11-25 op #define TOOSMALL 2
24 90fbce40 2021-11-25 op #define TOOLARGE 3
27 90fbce40 2021-11-25 op strtonum(const char *numstr, long long minval, long long maxval,
28 90fbce40 2021-11-25 op const char **errstrp)
30 90fbce40 2021-11-25 op long long ll = 0;
31 90fbce40 2021-11-25 op int error = 0;
33 90fbce40 2021-11-25 op struct errval {
34 90fbce40 2021-11-25 op const char *errstr;
38 90fbce40 2021-11-25 op { "invalid", EINVAL },
39 90fbce40 2021-11-25 op { "too small", ERANGE },
40 90fbce40 2021-11-25 op { "too large", ERANGE },
43 90fbce40 2021-11-25 op ev[0].err = errno;
45 90fbce40 2021-11-25 op if (minval > maxval) {
46 90fbce40 2021-11-25 op error = INVALID;
48 90fbce40 2021-11-25 op ll = strtoll(numstr, &ep, 10);
49 90fbce40 2021-11-25 op if (numstr == ep || *ep != '\0')
50 90fbce40 2021-11-25 op error = INVALID;
51 90fbce40 2021-11-25 op else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
52 90fbce40 2021-11-25 op error = TOOSMALL;
53 90fbce40 2021-11-25 op else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
54 90fbce40 2021-11-25 op error = TOOLARGE;
56 90fbce40 2021-11-25 op if (errstrp != NULL)
57 90fbce40 2021-11-25 op *errstrp = ev[error].errstr;
58 90fbce40 2021-11-25 op errno = ev[error].err;