external/bsd/ntp/dist/lib/isc/parseint.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2001-2003  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: parseint.c,v 1.8 2007/06/19 23:47:17 tbox Exp */
  21
  22 /*! \file */
  23
  24 #include <config.h>
  25
  26 #include <ctype.h>
  27 #include <errno.h>
  28 #include <limits.h>
  29
  30 #include <isc/parseint.h>
  31 #include <isc/result.h>
  32 #include <isc/stdlib.h>
  33
  34 isc_result_t
  35 isc_parse_uint32(isc_uint32_t *uip, const char *string, int base) {
  36         unsigned long n;
  37         char *e;
  38         if (! isalnum((unsigned char)(string[0])))
  39                 return (ISC_R_BADNUMBER);
  40         errno = 0;
  41         n = strtoul(string, &e, base);
  42         if (*e != '\0')
  43                 return (ISC_R_BADNUMBER);
  44         if (n == ULONG_MAX && errno == ERANGE)
  45                 return (ISC_R_RANGE);
  46         *uip = n;
  47         return (ISC_R_SUCCESS);
  48 }
  49
  50 isc_result_t
  51 isc_parse_uint16(isc_uint16_t *uip, const char *string, int base) {
  52         isc_uint32_t val;
  53         isc_result_t result;
  54         result = isc_parse_uint32(&val, string, base);
  55         if (result != ISC_R_SUCCESS)
  56                 return (result);
  57         if (val > 0xFFFF)
  58                 return (ISC_R_RANGE);
  59         *uip = (isc_uint16_t) val;
  60         return (ISC_R_SUCCESS);
  61 }
  62
  63 isc_result_t
  64 isc_parse_uint8(isc_uint8_t *uip, const char *string, int base) {
  65         isc_uint32_t val;
  66         isc_result_t result;
  67         result = isc_parse_uint32(&val, string, base);
  68         if (result != ISC_R_SUCCESS)
  69                 return (result);
  70         if (val > 0xFF)
  71                 return (ISC_R_RANGE);
  72         *uip = (isc_uint8_t) val;
  73         return (ISC_R_SUCCESS);
  74 }