1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Copyright (c) 2011 The FreeBSD Foundation 6 * All rights reserved. 7 * Portions of this software were developed by David Chisnall 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD: head/lib/libc/locale/wcstol.c 227753 2011-11-20 14:45:42Z theraven $ 35 */ 36 37 38 #include <ctype.h> 39 #include <errno.h> 40 #include <limits.h> 41 #include <wchar.h> 42 #include <wctype.h> 43 #include "xlocale_private.h" 44 45 /* 46 * Convert a string to a long integer. 47 */ 48 long 49 wcstol_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int 50 base, locale_t locale) 51 { 52 const wchar_t *s; 53 unsigned long acc; 54 wchar_t c; 55 unsigned long cutoff; 56 int neg, any, cutlim; 57 FIX_LOCALE(locale); 58 59 /* 60 * See strtol for comments as to the logic used. 61 */ 62 s = nptr; 63 do { 64 c = *s++; 65 } while (iswspace_l(c, locale)); 66 if (c == '-') { 67 neg = 1; 68 c = *s++; 69 } else { 70 neg = 0; 71 if (c == L'+') 72 c = *s++; 73 } 74 if ((base == 0 || base == 16) && 75 c == L'0' && 76 (*s == L'x' || *s == L'X') && 77 iswxdigit_l(s[1], locale)) 78 { 79 c = s[1]; 80 s += 2; 81 base = 16; 82 } 83 if (base == 0) 84 base = c == L'0' ? 8 : 10; 85 acc = any = 0; 86 if (base < 2 || base > 36) 87 goto noconv; 88 89 cutoff = neg ? (unsigned long)-(LONG_MIN + LONG_MAX) + LONG_MAX 90 : LONG_MAX; 91 cutlim = cutoff % base; 92 cutoff /= base; 93 for ( ; ; c = *s++) { 94 #ifdef notyet 95 if (iswdigit_l(c, locale)) 96 c = digittoint_l(c, locale); 97 else 98 #endif 99 if (c >= L'0' && c <= L'9') 100 c -= L'0'; 101 else if (c >= L'A' && c <= L'Z') 102 c -= L'A' - 10; 103 else if (c >= L'a' && c <= L'z') 104 c -= L'a' - 10; 105 else 106 break; 107 if (c >= base) 108 break; 109 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 110 any = -1; 111 else { 112 any = 1; 113 acc *= base; 114 acc += c; 115 } 116 } 117 if (any < 0) { 118 acc = neg ? LONG_MIN : LONG_MAX; 119 errno = ERANGE; 120 } else if (!any) { 121 noconv: 122 errno = EINVAL; 123 } else if (neg) 124 acc = -acc; 125 if (endptr != NULL) 126 *endptr = (wchar_t *)(any ? s - 1 : nptr); 127 return (acc); 128 } 129 long 130 wcstol(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 131 { 132 return wcstol_l(nptr, endptr, base, __get_locale()); 133 } 134