1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1986 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifndef _WCS_LONGLONG 33 #pragma weak _wcstoul = wcstoul 34 #endif 35 36 #include "lint.h" 37 #include <limits.h> 38 #include <errno.h> 39 #include <wchar.h> 40 #define DIGIT(x) (iswdigit(x) ? (x) - L'0' : \ 41 iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A') 42 #define MBASE (L'z' - L'a' + 1 + 10) 43 44 #ifdef _WCS_LONGLONG 45 #define _WULONG_T unsigned long long 46 #define _WULONG_MAX ULLONG_MAX 47 #else /* _WCS_LONGLONG */ 48 #define _WULONG_T unsigned long 49 #define _WULONG_MAX ULONG_MAX 50 #endif /* _WCS_LONGLONG */ 51 52 #ifdef _WCS_LONGLONG 53 unsigned long long 54 wcstoull(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 55 int base) 56 #else /* _WCS_LONGLONG */ 57 unsigned long 58 wcstoul(const wchar_t *str, wchar_t **ptr, int base) 59 #endif /* _WCS_LONGLONG */ 60 { 61 _WULONG_T val; 62 wchar_t c; 63 int xx, neg = 0; 64 _WULONG_T multmax; 65 66 if (ptr != NULL) 67 *ptr = (wchar_t *)str; /* in case no number is formed */ 68 if (base < 0 || base > MBASE) { 69 errno = EINVAL; 70 return (0); /* base is invalid -- should be a fatal error */ 71 } 72 73 if (!iswalnum(c = *str)) { 74 while (iswspace(c)) { 75 c = *++str; 76 } 77 switch (c) { 78 case L'-': 79 neg++; 80 /*FALLTHRU*/ 81 case L'+': 82 c = *++str; 83 } 84 } 85 if (base == 0) { 86 if (c != L'0') 87 base = 10; 88 else if (str[1] == L'x' || str[1] == L'X') 89 base = 16; 90 else 91 base = 8; 92 } 93 /* 94 * for any base > 10, the digits incrementally following 95 * 9 are assumed to be "abc...z" or "ABC...Z" 96 */ 97 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 98 errno = EINVAL; 99 return (0); /* no number formed */ 100 } 101 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 102 (str[1] == L'x' || str[1] == L'X')) { 103 c = *(str += 2); /* skip over leading "0x" or "0X" */ 104 } 105 106 multmax = _WULONG_MAX / (_WULONG_T)base; 107 val = DIGIT(c); 108 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 109 /* accumulate neg avoids surprises near MAXLONG */ 110 if (val > multmax) 111 goto overflow; 112 val *= base; 113 if (_WULONG_MAX - val < xx) 114 goto overflow; 115 val += xx; 116 } 117 if (ptr != NULL) 118 *ptr = (wchar_t *)str; 119 return (neg ? -val : val); 120 121 overflow: 122 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 123 ; 124 125 if (ptr != NULL) 126 *ptr = (wchar_t *)str; 127 errno = ERANGE; 128 return (_WULONG_MAX); 129 } 130