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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 #if 0 36 #if defined(LIBC_SCCS) && !defined(lint) 37 static char sccsid[] = "from @(#)strtoul.c 8.1 (Berkeley) 6/4/93"; 38 #endif /* LIBC_SCCS and not lint */ 39 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoumax.c,v 1.8 2002/09/06 11:23:59 tjr Exp "); 40 #endif 41 __FBSDID("$FreeBSD$"); 42 43 #include <errno.h> 44 #include <inttypes.h> 45 #include <stdlib.h> 46 #include <wchar.h> 47 #include <wctype.h> 48 49 /* 50 * Convert a wide character string to a uintmax_t integer. 51 */ 52 uintmax_t 53 wcstoumax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 54 int base) 55 { 56 const wchar_t *s; 57 uintmax_t acc; 58 wchar_t c; 59 uintmax_t cutoff; 60 int neg, any, cutlim; 61 62 /* 63 * See strtoimax for comments as to the logic used. 64 */ 65 s = nptr; 66 do { 67 c = *s++; 68 } while (iswspace(c)); 69 if (c == L'-') { 70 neg = 1; 71 c = *s++; 72 } else { 73 neg = 0; 74 if (c == L'+') 75 c = *s++; 76 } 77 if ((base == 0 || base == 16) && 78 c == L'0' && (*s == L'x' || *s == L'X')) { 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 = UINTMAX_MAX / base; 90 cutlim = UINTMAX_MAX % base; 91 for ( ; ; c = *s++) { 92 #ifdef notyet 93 if (iswdigit(c)) 94 c = digittoint(c); 95 else 96 #endif 97 if (c >= L'0' && c <= L'9') 98 c -= L'0'; 99 else if (c >= L'A' && c <= L'Z') 100 c -= L'A' - 10; 101 else if (c >= L'a' && c <= L'z') 102 c -= L'a' - 10; 103 else 104 break; 105 if (c >= base) 106 break; 107 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 108 any = -1; 109 else { 110 any = 1; 111 acc *= base; 112 acc += c; 113 } 114 } 115 if (any < 0) { 116 acc = UINTMAX_MAX; 117 errno = ERANGE; 118 } else if (!any) { 119 noconv: 120 errno = EINVAL; 121 } else if (neg) 122 acc = -acc; 123 if (endptr != NULL) 124 *endptr = (wchar_t *)(any ? s - 1 : nptr); 125 return (acc); 126 } 127