contrib/bind/lib/isc/parseint.c

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