xref: /minix3/external/bsd/bind/dist/lib/isc/parseint.c (revision 00b67f09dd46474d133c95011a48590a8e8f94c7)
1*00b67f09SDavid van Moolenbroek /*	$NetBSD: parseint.c,v 1.5 2014/12/10 04:37:59 christos Exp $	*/
2*00b67f09SDavid van Moolenbroek 
3*00b67f09SDavid van Moolenbroek /*
4*00b67f09SDavid van Moolenbroek  * Copyright (C) 2004, 2005, 2007, 2012  Internet Systems Consortium, Inc. ("ISC")
5*00b67f09SDavid van Moolenbroek  * Copyright (C) 2001-2003  Internet Software Consortium.
6*00b67f09SDavid van Moolenbroek  *
7*00b67f09SDavid van Moolenbroek  * Permission to use, copy, modify, and/or distribute this software for any
8*00b67f09SDavid van Moolenbroek  * purpose with or without fee is hereby granted, provided that the above
9*00b67f09SDavid van Moolenbroek  * copyright notice and this permission notice appear in all copies.
10*00b67f09SDavid van Moolenbroek  *
11*00b67f09SDavid van Moolenbroek  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12*00b67f09SDavid van Moolenbroek  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13*00b67f09SDavid van Moolenbroek  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14*00b67f09SDavid van Moolenbroek  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15*00b67f09SDavid van Moolenbroek  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
16*00b67f09SDavid van Moolenbroek  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17*00b67f09SDavid van Moolenbroek  * PERFORMANCE OF THIS SOFTWARE.
18*00b67f09SDavid van Moolenbroek  */
19*00b67f09SDavid van Moolenbroek 
20*00b67f09SDavid van Moolenbroek /* Id: parseint.c,v 1.8 2007/06/19 23:47:17 tbox Exp  */
21*00b67f09SDavid van Moolenbroek 
22*00b67f09SDavid van Moolenbroek /*! \file */
23*00b67f09SDavid van Moolenbroek 
24*00b67f09SDavid van Moolenbroek #include <config.h>
25*00b67f09SDavid van Moolenbroek 
26*00b67f09SDavid van Moolenbroek #include <ctype.h>
27*00b67f09SDavid van Moolenbroek #include <errno.h>
28*00b67f09SDavid van Moolenbroek #include <limits.h>
29*00b67f09SDavid van Moolenbroek 
30*00b67f09SDavid van Moolenbroek #include <isc/parseint.h>
31*00b67f09SDavid van Moolenbroek #include <isc/result.h>
32*00b67f09SDavid van Moolenbroek #include <isc/stdlib.h>
33*00b67f09SDavid van Moolenbroek 
34*00b67f09SDavid van Moolenbroek isc_result_t
isc_parse_uint32(isc_uint32_t * uip,const char * string,int base)35*00b67f09SDavid van Moolenbroek isc_parse_uint32(isc_uint32_t *uip, const char *string, int base) {
36*00b67f09SDavid van Moolenbroek 	unsigned long n;
37*00b67f09SDavid van Moolenbroek 	isc_uint32_t r;
38*00b67f09SDavid van Moolenbroek 	char *e;
39*00b67f09SDavid van Moolenbroek 	if (! isalnum((unsigned char)(string[0])))
40*00b67f09SDavid van Moolenbroek 		return (ISC_R_BADNUMBER);
41*00b67f09SDavid van Moolenbroek 	errno = 0;
42*00b67f09SDavid van Moolenbroek 	n = strtoul(string, &e, base);
43*00b67f09SDavid van Moolenbroek 	if (*e != '\0')
44*00b67f09SDavid van Moolenbroek 		return (ISC_R_BADNUMBER);
45*00b67f09SDavid van Moolenbroek 	/*
46*00b67f09SDavid van Moolenbroek 	 * Where long is 64 bits we need to convert to 32 bits then test for
47*00b67f09SDavid van Moolenbroek 	 * equality.  This is a no-op on 32 bit machines and a good compiler
48*00b67f09SDavid van Moolenbroek 	 * will optimise it away.
49*00b67f09SDavid van Moolenbroek 	 */
50*00b67f09SDavid van Moolenbroek 	r = (isc_uint32_t)n;
51*00b67f09SDavid van Moolenbroek 	if ((n == ULONG_MAX && errno == ERANGE) || (n != (unsigned long)r))
52*00b67f09SDavid van Moolenbroek 		return (ISC_R_RANGE);
53*00b67f09SDavid van Moolenbroek 	*uip = r;
54*00b67f09SDavid van Moolenbroek 	return (ISC_R_SUCCESS);
55*00b67f09SDavid van Moolenbroek }
56*00b67f09SDavid van Moolenbroek 
57*00b67f09SDavid van Moolenbroek isc_result_t
isc_parse_uint16(isc_uint16_t * uip,const char * string,int base)58*00b67f09SDavid van Moolenbroek isc_parse_uint16(isc_uint16_t *uip, const char *string, int base) {
59*00b67f09SDavid van Moolenbroek 	isc_uint32_t val;
60*00b67f09SDavid van Moolenbroek 	isc_result_t result;
61*00b67f09SDavid van Moolenbroek 	result = isc_parse_uint32(&val, string, base);
62*00b67f09SDavid van Moolenbroek 	if (result != ISC_R_SUCCESS)
63*00b67f09SDavid van Moolenbroek 		return (result);
64*00b67f09SDavid van Moolenbroek 	if (val > 0xFFFF)
65*00b67f09SDavid van Moolenbroek 		return (ISC_R_RANGE);
66*00b67f09SDavid van Moolenbroek 	*uip = (isc_uint16_t) val;
67*00b67f09SDavid van Moolenbroek 	return (ISC_R_SUCCESS);
68*00b67f09SDavid van Moolenbroek }
69*00b67f09SDavid van Moolenbroek 
70*00b67f09SDavid van Moolenbroek isc_result_t
isc_parse_uint8(isc_uint8_t * uip,const char * string,int base)71*00b67f09SDavid van Moolenbroek isc_parse_uint8(isc_uint8_t *uip, const char *string, int base) {
72*00b67f09SDavid van Moolenbroek 	isc_uint32_t val;
73*00b67f09SDavid van Moolenbroek 	isc_result_t result;
74*00b67f09SDavid van Moolenbroek 	result = isc_parse_uint32(&val, string, base);
75*00b67f09SDavid van Moolenbroek 	if (result != ISC_R_SUCCESS)
76*00b67f09SDavid van Moolenbroek 		return (result);
77*00b67f09SDavid van Moolenbroek 	if (val > 0xFF)
78*00b67f09SDavid van Moolenbroek 		return (ISC_R_RANGE);
79*00b67f09SDavid van Moolenbroek 	*uip = (isc_uint8_t) val;
80*00b67f09SDavid van Moolenbroek 	return (ISC_R_SUCCESS);
81*00b67f09SDavid van Moolenbroek }
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