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tstrtonum.c - ics2txt - convert icalendar .ics file to plain text |
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git clone git://bitreich.org/ics2txt git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65d7roiv6bfj7d652fid.onion/ics2txt (git://bitreich.org) |
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tstrtonum.c (1772B) |
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--- |
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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 } |
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