1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #if 0 32 #if defined(LIBC_SCCS) && !defined(lint) 33 static char sccsid[] = "@(#)strtoq.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoll.c,v 1.19 2002/09/06 11:23:59 tjr Exp "); 36 #endif 37 __FBSDID("$FreeBSD$"); 38 39 #include <errno.h> 40 #include <limits.h> 41 #include <stdlib.h> 42 #include <wchar.h> 43 #include <wctype.h> 44 45 /* 46 * Convert a wide character string to a long long integer. 47 */ 48 long long 49 wcstoll(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, int base) 50 { 51 const wchar_t *s; 52 unsigned long long acc; 53 wchar_t c; 54 unsigned long long cutoff; 55 int neg, any, cutlim; 56 57 /* 58 * See strtoll for comments as to the logic used. 59 */ 60 s = nptr; 61 do { 62 c = *s++; 63 } while (iswspace(c)); 64 if (c == L'-') { 65 neg = 1; 66 c = *s++; 67 } else { 68 neg = 0; 69 if (c == L'+') 70 c = *s++; 71 } 72 if ((base == 0 || base == 16) && 73 c == L'0' && (*s == L'x' || *s == L'X')) { 74 c = s[1]; 75 s += 2; 76 base = 16; 77 } 78 if (base == 0) 79 base = c == L'0' ? 8 : 10; 80 acc = any = 0; 81 if (base < 2 || base > 36) 82 goto noconv; 83 84 cutoff = neg ? (unsigned long long)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX 85 : LLONG_MAX; 86 cutlim = cutoff % base; 87 cutoff /= base; 88 for ( ; ; c = *s++) { 89 #ifdef notyet 90 if (iswdigit(c)) 91 c = digittoint(c); 92 else 93 #endif 94 if (c >= L'0' && c <= L'9') 95 c -= L'0'; 96 else if (c >= L'A' && c <= L'Z') 97 c -= L'A' - 10; 98 else if (c >= L'a' && c <= L'z') 99 c -= L'a' - 10; 100 else 101 break; 102 if (c >= base) 103 break; 104 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 105 any = -1; 106 else { 107 any = 1; 108 acc *= base; 109 acc += c; 110 } 111 } 112 if (any < 0) { 113 acc = neg ? LLONG_MIN : LLONG_MAX; 114 errno = ERANGE; 115 } else if (!any) { 116 noconv: 117 errno = EINVAL; 118 } else if (neg) 119 acc = -acc; 120 if (endptr != NULL) 121 *endptr = (wchar_t *)(any ? s - 1 : nptr); 122 return (acc); 123 } 124