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 wcstol = _wcstol 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 _WLONG_T long long 48 #define _WLONG_MAX LLONG_MAX 49 #define _WLONG_MIN LLONG_MIN 50 #else /* _WCS_LONGLONG */ 51 #define _WLONG_T long 52 #define _WLONG_MAX LONG_MAX 53 #define _WLONG_MIN LONG_MIN 54 #endif /* _WCS_LONGLONG */ 55 56 #ifdef _WCS_LONGLONG 57 long long 58 wcstoll(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 59 int base) 60 #else /* _WCS_LONGLONG */ 61 long 62 _wcstol(const wchar_t *str, wchar_t **ptr, int base) 63 #endif /* _WCS_LONGLONG */ 64 { 65 _WLONG_T val; 66 wchar_t c; 67 int xx, neg = 0; 68 _WLONG_T multmin, limit; 69 70 if (ptr != NULL) 71 *ptr = (wchar_t *)str; /* in case no number is formed */ 72 if (base < 0 || base > MBASE) { 73 errno = EINVAL; 74 return (0); /* base is invalid -- should be a fatal error */ 75 } 76 77 if (!iswalnum(c = *str)) { 78 while (iswspace(c)) { 79 c = *++str; 80 } 81 switch (c) { 82 case L'-': 83 neg++; 84 /*FALLTHRU*/ 85 case L'+': 86 c = *++str; 87 } 88 } 89 if (base == 0) { 90 if (c != L'0') 91 base = 10; 92 else if (str[1] == L'x' || str[1] == L'X') 93 base = 16; 94 else 95 base = 8; 96 } 97 /* 98 * for any base > 10, the digits incrementally following 99 * 9 are assumed to be "abc...z" or "ABC...Z" 100 */ 101 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 102 errno = EINVAL; 103 return (0); /* no number formed */ 104 } 105 106 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 107 (str[1] == L'x' || str[1] == L'X')) { 108 c = *(str += 2); /* skip over leading "0x" or "0X" */ 109 } 110 111 if (neg) { 112 limit = _WLONG_MIN; 113 } else { 114 limit = -_WLONG_MAX; 115 } 116 multmin = limit / base; 117 118 val = -DIGIT(c); 119 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 120 /* accumulate neg avoids surprises near MAXLONG */ 121 if (val < multmin) 122 goto overflow; 123 val *= base; 124 if (val < limit + xx) 125 goto overflow; 126 val -= xx; 127 } 128 if (ptr != NULL) 129 *ptr = (wchar_t *)str; 130 return (neg ? val : -val); 131 132 overflow: 133 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 134 ; 135 136 if (ptr != NULL) 137 *ptr = (wchar_t *)str; 138 errno = ERANGE; 139 return (neg ? _WLONG_MIN : _WLONG_MAX); 140 } 141