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 #ifndef _WCS_LONGLONG 31 #pragma weak _wcstoul = wcstoul 32 #endif 33 34 #include "lint.h" 35 #include <limits.h> 36 #include <errno.h> 37 #include <wchar.h> 38 #define DIGIT(x) (iswdigit(x) ? (x) - L'0' : \ 39 iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A') 40 #define MBASE (L'z' - L'a' + 1 + 10) 41 42 #ifdef _WCS_LONGLONG 43 #define _WULONG_T unsigned long long 44 #define _WULONG_MAX ULLONG_MAX 45 #else /* _WCS_LONGLONG */ 46 #define _WULONG_T unsigned long 47 #define _WULONG_MAX ULONG_MAX 48 #endif /* _WCS_LONGLONG */ 49 50 #ifdef _WCS_LONGLONG 51 unsigned long long 52 wcstoull(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 53 int base) 54 #else /* _WCS_LONGLONG */ 55 unsigned long 56 wcstoul(const wchar_t *str, wchar_t **ptr, int base) 57 #endif /* _WCS_LONGLONG */ 58 { 59 _WULONG_T val; 60 wchar_t c; 61 int xx, neg = 0; 62 _WULONG_T multmax; 63 64 if (ptr != NULL) 65 *ptr = (wchar_t *)str; /* in case no number is formed */ 66 if (base < 0 || base > MBASE) { 67 errno = EINVAL; 68 return (0); /* base is invalid -- should be a fatal error */ 69 } 70 71 if (!iswalnum(c = *str)) { 72 while (iswspace(c)) { 73 c = *++str; 74 } 75 switch (c) { 76 case L'-': 77 neg++; 78 /*FALLTHRU*/ 79 case L'+': 80 c = *++str; 81 } 82 } 83 if (base == 0) { 84 if (c != L'0') 85 base = 10; 86 else if (str[1] == L'x' || str[1] == L'X') 87 base = 16; 88 else 89 base = 8; 90 } 91 /* 92 * for any base > 10, the digits incrementally following 93 * 9 are assumed to be "abc...z" or "ABC...Z" 94 */ 95 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 96 errno = EINVAL; 97 return (0); /* no number formed */ 98 } 99 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 100 (str[1] == L'x' || str[1] == L'X')) { 101 c = *(str += 2); /* skip over leading "0x" or "0X" */ 102 } 103 104 multmax = _WULONG_MAX / (_WULONG_T)base; 105 val = DIGIT(c); 106 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 107 /* accumulate neg avoids surprises near MAXLONG */ 108 if (val > multmax) 109 goto overflow; 110 val *= base; 111 if (_WULONG_MAX - val < xx) 112 goto overflow; 113 val += xx; 114 } 115 if (ptr != NULL) 116 *ptr = (wchar_t *)str; 117 return (neg ? -val : val); 118 119 overflow: 120 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 121 ; 122 123 if (ptr != NULL) 124 *ptr = (wchar_t *)str; 125 errno = ERANGE; 126 return (_WULONG_MAX); 127 } 128