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 _wcstol = wcstol 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 _WLONG_T long long 44 #define _WLONG_MAX LLONG_MAX 45 #define _WLONG_MIN LLONG_MIN 46 #else /* _WCS_LONGLONG */ 47 #define _WLONG_T long 48 #define _WLONG_MAX LONG_MAX 49 #define _WLONG_MIN LONG_MIN 50 #endif /* _WCS_LONGLONG */ 51 52 #ifdef _WCS_LONGLONG 53 long long 54 wcstoll(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr, 55 int base) 56 #else /* _WCS_LONGLONG */ 57 long 58 wcstol(const wchar_t *str, wchar_t **ptr, int base) 59 #endif /* _WCS_LONGLONG */ 60 { 61 _WLONG_T val; 62 wchar_t c; 63 int xx, neg = 0; 64 _WLONG_T multmin, limit; 65 66 if (ptr != NULL) 67 *ptr = (wchar_t *)str; /* in case no number is formed */ 68 if (base < 0 || base > MBASE) { 69 errno = EINVAL; 70 return (0); /* base is invalid -- should be a fatal error */ 71 } 72 73 if (!iswalnum(c = *str)) { 74 while (iswspace(c)) { 75 c = *++str; 76 } 77 switch (c) { 78 case L'-': 79 neg++; 80 /*FALLTHRU*/ 81 case L'+': 82 c = *++str; 83 } 84 } 85 if (base == 0) { 86 if (c != L'0') 87 base = 10; 88 else if (str[1] == L'x' || str[1] == L'X') 89 base = 16; 90 else 91 base = 8; 92 } 93 /* 94 * for any base > 10, the digits incrementally following 95 * 9 are assumed to be "abc...z" or "ABC...Z" 96 */ 97 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) { 98 errno = EINVAL; 99 return (0); /* no number formed */ 100 } 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 if (neg) { 108 limit = _WLONG_MIN; 109 } else { 110 limit = -_WLONG_MAX; 111 } 112 multmin = limit / base; 113 114 val = -DIGIT(c); 115 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) { 116 /* accumulate neg avoids surprises near MAXLONG */ 117 if (val < multmin) 118 goto overflow; 119 val *= base; 120 if (val < limit + xx) 121 goto overflow; 122 val -= xx; 123 } 124 if (ptr != NULL) 125 *ptr = (wchar_t *)str; 126 return (neg ? val : -val); 127 128 overflow: 129 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base) 130 ; 131 132 if (ptr != NULL) 133 *ptr = (wchar_t *)str; 134 errno = ERANGE; 135 return (neg ? _WLONG_MIN : _WLONG_MAX); 136 } 137