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
isc_parse_uint32(isc_uint32_t * uip,const char * string,int base)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
isc_parse_uint16(isc_uint16_t * uip,const char * string,int base)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
isc_parse_uint8(isc_uint8_t * uip,const char * string,int base)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 }
73