1 /*- 2 * Copyright (c) 1992, 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 * from @(#)strtol.c 8.1 (Berkeley) 6/4/93 35 * $FreeBSD: head/lib/libc/locale/wcstoimax.c 227753 2011-11-20 14:45:42Z theraven $ 36 */ 37 38 39 #include <errno.h> 40 #include <inttypes.h> 41 #include <stdlib.h> 42 #include <wchar.h> 43 #include <wctype.h> 44 #include "xlocale_private.h" 45 46 /* 47 * Convert a wide character string to an intmax_t integer. 48 */ 49 intmax_t 50 wcstoimax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 51 int base, locale_t locale) 52 { 53 const wchar_t *s; 54 uintmax_t acc; 55 wchar_t c; 56 uintmax_t cutoff; 57 int neg, any, cutlim; 58 FIX_LOCALE(locale); 59 60 /* 61 * See strtoimax for comments as to the logic used. 62 */ 63 s = nptr; 64 do { 65 c = *s++; 66 } while (iswspace_l(c, locale)); 67 if (c == L'-') { 68 neg = 1; 69 c = *s++; 70 } else { 71 neg = 0; 72 if (c == L'+') 73 c = *s++; 74 } 75 if ((base == 0 || base == 16) && 76 c == L'0' && 77 (*s == L'x' || *s == L'X') && 78 iswxdigit_l(s[1], locale)) 79 { 80 c = s[1]; 81 s += 2; 82 base = 16; 83 } 84 if (base == 0) 85 base = c == L'0' ? 8 : 10; 86 acc = any = 0; 87 if (base < 2 || base > 36) 88 goto noconv; 89 90 cutoff = neg ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX 91 : INTMAX_MAX; 92 cutlim = cutoff % base; 93 cutoff /= base; 94 for ( ; ; c = *s++) { 95 #ifdef notyet 96 if (iswdigit_l(c, locale)) 97 c = digittoint_l(c, locale); 98 else 99 #endif 100 if (c >= L'0' && c <= L'9') 101 c -= L'0'; 102 else if (c >= L'A' && c <= L'Z') 103 c -= L'A' - 10; 104 else if (c >= 'a' && c <= 'z') 105 c -= L'a' - 10; 106 else 107 break; 108 if (c >= base) 109 break; 110 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 111 any = -1; 112 else { 113 any = 1; 114 acc *= base; 115 acc += c; 116 } 117 } 118 if (any < 0) { 119 acc = neg ? INTMAX_MIN : INTMAX_MAX; 120 errno = ERANGE; 121 } else if (!any) { 122 noconv: 123 errno = EINVAL; 124 } else if (neg) 125 acc = -acc; 126 if (endptr != NULL) 127 *endptr = (wchar_t *)(any ? s - 1 : nptr); 128 return (acc); 129 } 130 intmax_t 131 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 132 int base) 133 { 134 return wcstoimax_l(nptr, endptr, base, __get_locale()); 135 } 136