code.delx.au - spectrwm/blob - osx/osx.c

   1 /* $scrotwm$ */
   2
   3 #include <sys/types.h>
   4 #include <sys/cdefs.h>
   5
   6 #include <errno.h>
   7 #include <errno.h>
   8 #include <limits.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12
  13 #include "util.h"
  14
  15 /* --------------------------------------------------------------------------- */
  16 /*      $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $    */
  17
  18 /*
  19  * Copyright (c) 2004 Ted Unangst and Todd Miller
  20  * All rights reserved.
  21  *
  22  * Permission to use, copy, modify, and distribute this software for any
  23  * purpose with or without fee is hereby granted, provided that the above
  24  * copyright notice and this permission notice appear in all copies.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  27  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  28  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  29  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  30  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  31  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  32  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  33  */
  34
  35 #define INVALID         1
  36 #define TOOSMALL        2
  37 #define TOOLARGE        3
  38
  39 long long
  40 strtonum(const char *numstr, long long minval, long long maxval,
  41     const char **errstrp)
  42 {
  43         long long ll = 0;
  44         char *ep;
  45         int error = 0;
  46         struct errval {
  47                 const char *errstr;
  48                 int err;
  49         } ev[4] = {
  50                 { NULL,         0 },
  51                 { "invalid",    EINVAL },
  52                 { "too small",  ERANGE },
  53                 { "too large",  ERANGE },
  54         };
  55
  56         ev[0].err = errno;
  57         errno = 0;
  58         if (minval > maxval)
  59                 error = INVALID;
  60         else {
  61                 ll = strtoll(numstr, &ep, 10);
  62                 if (numstr == ep || *ep != '\0')
  63                         error = INVALID;
  64                 else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
  65                         error = TOOSMALL;
  66                 else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
  67                         error = TOOLARGE;
  68         }
  69         if (errstrp != NULL)
  70                 *errstrp = ev[error].errstr;
  71         errno = ev[error].err;
  72         if (error)
  73                 ll = 0;
  74
  75         return (ll);
  76 }