crypto/external/bsd/openssh/dist/strtonum.c

   1 /*      $NetBSD: strtonum.c,v 1.3 2009/02/16 20:53:55 christos Exp $    */
   2 /*      $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $    */
   3
   4 /*
   5  * Copyright (c) 2004 Ted Unangst and Todd Miller
   6  * All rights reserved.
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20
  21 /* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */
  22
  23 #include "includes.h"
  24 __RCSID("$NetBSD: strtonum.c,v 1.3 2009/02/16 20:53:55 christos Exp $");
  25
  26 #ifndef HAVE_STRTONUM
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <limits.h>
  31 #include <errno.h>
  32 #include <time.h>
  33 #include "misc.h"
  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 }
  77
  78 #endif /* HAVE_STRTONUM */