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/*
* Copyright (C) 2004, 2005, 2007, 2012 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2001-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: parseint.c,v 1.8 2007/06/19 23:47:17 tbox Exp $ */
/*! \file */
#include <config.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <isc/parseint.h>
#include <isc/result.h>
#include <isc/stdlib.h>
isc_result_t
isc_parse_uint32(isc_uint32_t *uip, const char *string, int base) {
unsigned long n;
isc_uint32_t r;
char *e;
if (! isalnum((unsigned char)(string[0])))
return (ISC_R_BADNUMBER);
errno = 0;
n = strtoul(string, &e, base);
if (*e != '\0')
return (ISC_R_BADNUMBER);
/*
* Where long is 64 bits we need to convert to 32 bits then test for
* equality. This is a no-op on 32 bit machines and a good compiler
* will optimise it away.
*/
r = (isc_uint32_t)n;
if ((n == ULONG_MAX && errno == ERANGE) || (n != (unsigned long)r))
return (ISC_R_RANGE);
*uip = r;
return (ISC_R_SUCCESS);
}
isc_result_t
isc_parse_uint16(isc_uint16_t *uip, const char *string, int base) {
isc_uint32_t val;
isc_result_t result;
result = isc_parse_uint32(&val, string, base);
if (result != ISC_R_SUCCESS)
return (result);
if (val > 0xFFFF)
return (ISC_R_RANGE);
*uip = (isc_uint16_t) val;
return (ISC_R_SUCCESS);
}
isc_result_t
isc_parse_uint8(isc_uint8_t *uip, const char *string, int base) {
isc_uint32_t val;
isc_result_t result;
result = isc_parse_uint32(&val, string, base);
if (result != ISC_R_SUCCESS)
return (result);
if (val > 0xFF)
return (ISC_R_RANGE);
*uip = (isc_uint8_t) val;
return (ISC_R_SUCCESS);
}
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