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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 /* Copyright (c) 1986 AT&T */ 31 /* All Rights Reserved */ 32 33 34 #ifndef _WCS_LONGLONG 35 #pragma weak wcstoul = _wcstoul 36 #endif 37 38 #include "synonyms.h" 39 #include <limits.h> 40 #include <errno.h> 41 #include <wchar.h> 42 #define DIGIT(x) (iswdigit(x) ? (x) - L'0' : \ 43 iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A') 44 #define MBASE (L'z' - L'a' + 1 + 10) 45 46 #ifdef _WCS_LONGLONG 47 #define _WULONG_T unsigned long long 48 #define _WULONG_MAX ULLONG_MAX 49 #else /* _WCS_LONGLONG */ 50 #define _WULONG_T unsigned long 51 #define _WULONG_MAX ULONG_MAX 52 #endif /* _WCS_LONGLONG */ 53 54 #ifdef _WCS_LONGLONG 55 unsigned long long 56 wcstoull(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 57 int base) 58 #else /* _WCS_LONGLONG */ 59 unsigned long 60 _wcstoul(const wchar_t *str, wchar_t **ptr, int base) 61 #endif /* _WCS_LONGLONG */ 62 { 63 _WULONG_T val; 64 wchar_t c; 65 int xx, neg = 0; 66 _WULONG_T multmax; 67 68 if (ptr != NULL) 69 *ptr = (wchar_t *)str; /* in case no number is formed */ 70 if (base < 0 || base > MBASE) { 71 errno = EINVAL; 72 return (0); /* base is invalid -- should be a fatal error */ 73 } 74 75 if (!iswalnum(c = *str)) { 76 while (iswspace(c)) { 77 c = *++str; 78 } 79 switch (c) { 80 case L'-': 81 neg++; 82 /*FALLTHRU*/ 83 case L'+': 84 c = *++str; 85 } 86 } 87 if (base == 0) { 88 if (c != L'0') 89 base = 10; 90 else if (str[1] == L'x' || str[1] == L'X') 91 base = 16; 92 else 93 base = 8; 94 } 95 /* 96 * for any base > 10, the digits incrementally following 97 * 9 are assumed to be "abc...z" or "ABC...Z" 98 */ 99 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 100 errno = EINVAL; 101 return (0); /* no number formed */ 102 } 103 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 104 (str[1] == L'x' || str[1] == L'X')) { 105 c = *(str += 2); /* skip over leading "0x" or "0X" */ 106 } 107 108 multmax = _WULONG_MAX / (_WULONG_T)base; 109 val = DIGIT(c); 110 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 111 /* accumulate neg avoids surprises near MAXLONG */ 112 if (val > multmax) 113 goto overflow; 114 val *= base; 115 if (_WULONG_MAX - val < xx) 116 goto overflow; 117 val += xx; 118 } 119 if (ptr != NULL) 120 *ptr = (wchar_t *)str; 121 return (neg ? -val : val); 122 123 overflow: 124 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 125 ; 126 127 if (ptr != NULL) 128 *ptr = (wchar_t *)str; 129 errno = ERANGE; 130 return (_WULONG_MAX); 131 } 132