parseint.c revision 290001 
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
32isc_result_t
33isc_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
48isc_result_t
49isc_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
61isc_result_t
62isc_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}
73