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 _wcstol = wcstol 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 _WLONG_T long long 46 #define _WLONG_MAX LLONG_MAX 47 #define _WLONG_MIN LLONG_MIN 48 #else /* _WCS_LONGLONG */ 49 #define _WLONG_T long 50 #define _WLONG_MAX LONG_MAX 51 #define _WLONG_MIN LONG_MIN 52 #endif /* _WCS_LONGLONG */ 53 54 #ifdef _WCS_LONGLONG 55 long long 56 wcstoll(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 57 int base) 58 #else /* _WCS_LONGLONG */ 59 long 60 wcstol(const wchar_t *str, wchar_t **ptr, int base) 61 #endif /* _WCS_LONGLONG */ 62 { 63 _WLONG_T val; 64 wchar_t c; 65 int xx, neg = 0; 66 _WLONG_T multmin, limit; 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 } 103 104 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 105 (str[1] == L'x' || str[1] == L'X')) { 106 c = *(str += 2); /* skip over leading "0x" or "0X" */ 107 } 108 109 if (neg) { 110 limit = _WLONG_MIN; 111 } else { 112 limit = -_WLONG_MAX; 113 } 114 multmin = limit / base; 115 116 val = -DIGIT(c); 117 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 118 /* accumulate neg avoids surprises near MAXLONG */ 119 if (val < multmin) 120 goto overflow; 121 val *= base; 122 if (val < limit + xx) 123 goto overflow; 124 val -= xx; 125 } 126 if (ptr != NULL) 127 *ptr = (wchar_t *)str; 128 return (neg ? val : -val); 129 130 overflow: 131 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 132 ; 133 134 if (ptr != NULL) 135 *ptr = (wchar_t *)str; 136 errno = ERANGE; 137 return (neg ? _WLONG_MIN : _WLONG_MAX); 138 } 139