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 wcstol = _wcstol 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 _WLONG_T long long 47 #define _WLONG_MAX LLONG_MAX 48 #define _WLONG_MIN LLONG_MIN 49 #else /* _WCS_LONGLONG */ 50 #define _WLONG_T long 51 #define _WLONG_MAX LONG_MAX 52 #define _WLONG_MIN LONG_MIN 53 #endif /* _WCS_LONGLONG */ 54 55 #ifdef _WCS_LONGLONG 56 long long 57 wcstoll(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 58 int base) 59 #else /* _WCS_LONGLONG */ 60 long 61 _wcstol(const wchar_t *str, wchar_t **ptr, int base) 62 #endif /* _WCS_LONGLONG */ 63 { 64 _WLONG_T val; 65 wchar_t c; 66 int xx, neg = 0; 67 _WLONG_T multmin, limit; 68 69 if (ptr != NULL) 70 *ptr = (wchar_t *)str; /* in case no number is formed */ 71 if (base < 0 || base > MBASE) { 72 errno = EINVAL; 73 return (0); /* base is invalid -- should be a fatal error */ 74 } 75 76 if (!iswalnum(c = *str)) { 77 while (iswspace(c)) { 78 c = *++str; 79 } 80 switch (c) { 81 case L'-': 82 neg++; 83 /*FALLTHRU*/ 84 case L'+': 85 c = *++str; 86 } 87 } 88 if (base == 0) { 89 if (c != L'0') 90 base = 10; 91 else if (str[1] == L'x' || str[1] == L'X') 92 base = 16; 93 else 94 base = 8; 95 } 96 /* 97 * for any base > 10, the digits incrementally following 98 * 9 are assumed to be "abc...z" or "ABC...Z" 99 */ 100 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 101 errno = EINVAL; 102 return (0); /* no number formed */ 103 } 104 105 if (base == 16 && c == L'0' && iswxdigit(str[2]) && 106 (str[1] == L'x' || str[1] == L'X')) { 107 c = *(str += 2); /* skip over leading "0x" or "0X" */ 108 } 109 110 if (neg) { 111 limit = _WLONG_MIN; 112 } else { 113 limit = -_WLONG_MAX; 114 } 115 multmin = limit / base; 116 117 val = -DIGIT(c); 118 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 119 /* accumulate neg avoids surprises near MAXLONG */ 120 if (val < multmin) 121 goto overflow; 122 val *= base; 123 if (val < limit + xx) 124 goto overflow; 125 val -= xx; 126 } 127 if (ptr != NULL) 128 *ptr = (wchar_t *)str; 129 return (neg ? val : -val); 130 131 overflow: 132 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 133 ; 134 135 if (ptr != NULL) 136 *ptr = (wchar_t *)str; 137 errno = ERANGE; 138 return (neg ? _WLONG_MIN : _WLONG_MAX); 139 } 140