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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <config.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <inttypes.h>
#include <isc/parseint.h>
#include <isc/result.h>
#include <isc/stdlib.h>
isc_result_t
isc_parse_uint32(uint32_t *uip, const char *string, int base) {
unsigned long n;
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 = (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(uint16_t *uip, const char *string, int base) {
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 = (uint16_t) val;
return (ISC_R_SUCCESS);
}
isc_result_t
isc_parse_uint8(uint8_t *uip, const char *string, int base) {
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 = (uint8_t) val;
return (ISC_R_SUCCESS);
}
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