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annotate extern/libcompat/src/strtonum.c @ 975:5ffc8350e84b

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irccdctl: add support for rule editing
author David Demelier <markand@malikania.fr>
date Tue, 09 Feb 2021 13:00:32 +0100
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975
5ffc8350e84b irccdctl: add support for rule editing
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1 /* $OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther Exp $ */
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2
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3 /*
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4 * Copyright (c) 2004 Ted Unangst and Todd Miller
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5 * All rights reserved.
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6 *
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7 * Permission to use, copy, modify, and distribute this software for any
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8 * purpose with or without fee is hereby granted, provided that the above
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9 * copyright notice and this permission notice appear in all copies.
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10 *
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11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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18 */
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19
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20 #include <errno.h>
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21 #include <limits.h>
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22 #include <stdlib.h>
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23
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24 #define INVALID 1
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25 #define TOOSMALL 2
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26 #define TOOLARGE 3
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27
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28 long long
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29 strtonum(const char *numstr, long long minval, long long maxval,
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30 const char **errstrp)
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31 {
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32 long long ll = 0;
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33 int error = 0;
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34 char *ep;
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35 struct errval {
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36 const char *errstr;
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37 int err;
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38 } ev[4] = {
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39 { NULL, 0 },
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40 { "invalid", EINVAL },
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41 { "too small", ERANGE },
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42 { "too large", ERANGE },
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43 };
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44
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45 ev[0].err = errno;
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46 errno = 0;
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47 if (minval > maxval) {
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48 error = INVALID;
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49 } else {
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50 ll = strtoll(numstr, &ep, 10);
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51 if (numstr == ep || *ep != '\0')
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52 error = INVALID;
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53 else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
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54 error = TOOSMALL;
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55 else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
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56 error = TOOLARGE;
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57 }
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58 if (errstrp != NULL)
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59 *errstrp = ev[error].errstr;
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60 errno = ev[error].err;
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61 if (error)
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62 ll = 0;
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63
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64 return (ll);
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65 }