1 /* $NetBSD: parseint.c,v 1.5 2014/12/10 04:37:59 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2005, 2007, 2012 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 2001-2003 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: parseint.c,v 1.8 2007/06/19 23:47:17 tbox Exp */ 21 22 /*! \file */ 23 24 #include <config.h> 25 26 #include <ctype.h> 27 #include <errno.h> 28 #include <limits.h> 29 30 #include <isc/parseint.h> 31 #include <isc/result.h> 32 #include <isc/stdlib.h> 33 34 isc_result_t 35 isc_parse_uint32(isc_uint32_t *uip, const char *string, int base) { 36 unsigned long n; 37 isc_uint32_t r; 38 char *e; 39 if (! isalnum((unsigned char)(string[0]))) 40 return (ISC_R_BADNUMBER); 41 errno = 0; 42 n = strtoul(string, &e, base); 43 if (*e != '\0') 44 return (ISC_R_BADNUMBER); 45 /* 46 * Where long is 64 bits we need to convert to 32 bits then test for 47 * equality. This is a no-op on 32 bit machines and a good compiler 48 * will optimise it away. 49 */ 50 r = (isc_uint32_t)n; 51 if ((n == ULONG_MAX && errno == ERANGE) || (n != (unsigned long)r)) 52 return (ISC_R_RANGE); 53 *uip = r; 54 return (ISC_R_SUCCESS); 55 } 56 57 isc_result_t 58 isc_parse_uint16(isc_uint16_t *uip, const char *string, int base) { 59 isc_uint32_t val; 60 isc_result_t result; 61 result = isc_parse_uint32(&val, string, base); 62 if (result != ISC_R_SUCCESS) 63 return (result); 64 if (val > 0xFFFF) 65 return (ISC_R_RANGE); 66 *uip = (isc_uint16_t) val; 67 return (ISC_R_SUCCESS); 68 } 69 70 isc_result_t 71 isc_parse_uint8(isc_uint8_t *uip, const char *string, int base) { 72 isc_uint32_t val; 73 isc_result_t result; 74 result = isc_parse_uint32(&val, string, base); 75 if (result != ISC_R_SUCCESS) 76 return (result); 77 if (val > 0xFF) 78 return (ISC_R_RANGE); 79 *uip = (isc_uint8_t) val; 80 return (ISC_R_SUCCESS); 81 } 82