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 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1986 AT&T */ 30 /* All Rights Reserved */ 31 32 33 #ifndef _WCS_LONGLONG 34 #pragma weak wcstoul = _wcstoul 35 #endif 36 37 #include "lint.h" 38 #include <limits.h> 39 #include <errno.h> 40 #include <wchar.h> 41 #define DIGIT(x) (iswdigit(x) ? (x) - L'0' : \ 42 iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A') 43 #define MBASE (L'z' - L'a' + 1 + 10) 44 45 #ifdef _WCS_LONGLONG 46 #define _WULONG_T unsigned long long 47 #define _WULONG_MAX ULLONG_MAX 48 #else /* _WCS_LONGLONG */ 49 #define _WULONG_T unsigned long 50 #define _WULONG_MAX ULONG_MAX 51 #endif /* _WCS_LONGLONG */ 52 53 #ifdef _WCS_LONGLONG 54 unsigned long long 55 wcstoull(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 56 int base) 57 #else /* _WCS_LONGLONG */ 58 unsigned long 59 _wcstoul(const wchar_t *str, wchar_t **ptr, int base) 60 #endif /* _WCS_LONGLONG */ 61 { 62 _WULONG_T val; 63 wchar_t c; 64 int xx, neg = 0; 65 _WULONG_T multmax; 66 67 if (ptr != NULL) 68 *ptr = (wchar_t *)str; /* in case no number is formed */ 69 if (base < 0 || base > MBASE) { 70 errno = EINVAL; 71 return (0); /* base is invalid -- should be a fatal error */ 72 } 73 74 if (!iswalnum(c = *str)) { 75 while (iswspace(c)) { 76 c = *++str; 77 } 78 switch (c) { 79 case L'-': 80 neg++; 81 /*FALLTHRU*/ 82 case L'+': 83 c = *++str; 84 } 85 } 86 if (base == 0) { 87 if (c != L'0') 88 base = 10; 89 else if (str[1] == L'x' || str[1] == L'X') 90 base = 16; 91 else 92 base = 8; 93 } 94 /* 95 * for any base > 10, the digits incrementally following 96 * 9 are assumed to be "abc...z" or "ABC...Z" 97 */ 98 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 99 errno = EINVAL; 100 return (0); /* no number formed */ 101 } 102 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 103 (str[1] == L'x' || str[1] == L'X')) { 104 c = *(str += 2); /* skip over leading "0x" or "0X" */ 105 } 106 107 multmax = _WULONG_MAX / (_WULONG_T)base; 108 val = DIGIT(c); 109 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 110 /* accumulate neg avoids surprises near MAXLONG */ 111 if (val > multmax) 112 goto overflow; 113 val *= base; 114 if (_WULONG_MAX - val < xx) 115 goto overflow; 116 val += xx; 117 } 118 if (ptr != NULL) 119 *ptr = (wchar_t *)str; 120 return (neg ? -val : val); 121 122 overflow: 123 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 124 ; 125 126 if (ptr != NULL) 127 *ptr = (wchar_t *)str; 128 errno = ERANGE; 129 return (_WULONG_MAX); 130 } 131