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[] = "from @(#)strtol.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoimax.c,v 1.8 2002/09/06 11:23:59 tjr Exp "); 36 #endif 37 __FBSDID("$FreeBSD$"); 38 39 #include <errno.h> 40 #include <inttypes.h> 41 #include <stdlib.h> 42 #include <wchar.h> 43 #include <wctype.h> 44 45 /* 46 * Convert a wide character string to an intmax_t integer. 47 */ 48 intmax_t 49 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr, 50 int base) 51 { 52 const wchar_t *s; 53 uintmax_t acc; 54 wchar_t c; 55 uintmax_t cutoff; 56 int neg, any, cutlim; 57 58 /* 59 * See strtoimax for comments as to the logic used. 60 */ 61 s = nptr; 62 do { 63 c = *s++; 64 } while (iswspace(c)); 65 if (c == L'-') { 66 neg = 1; 67 c = *s++; 68 } else { 69 neg = 0; 70 if (c == L'+') 71 c = *s++; 72 } 73 if ((base == 0 || base == 16) && 74 c == L'0' && (*s == L'x' || *s == L'X')) { 75 c = s[1]; 76 s += 2; 77 base = 16; 78 } 79 if (base == 0) 80 base = c == L'0' ? 8 : 10; 81 acc = any = 0; 82 if (base < 2 || base > 36) 83 goto noconv; 84 85 cutoff = neg ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX 86 : INTMAX_MAX; 87 cutlim = cutoff % base; 88 cutoff /= base; 89 for ( ; ; c = *s++) { 90 #ifdef notyet 91 if (iswdigit(c)) 92 c = digittoint(c); 93 else 94 #endif 95 if (c >= L'0' && c <= L'9') 96 c -= L'0'; 97 else if (c >= L'A' && c <= L'Z') 98 c -= L'A' - 10; 99 else if (c >= 'a' && c <= 'z') 100 c -= L'a' - 10; 101 else 102 break; 103 if (c >= base) 104 break; 105 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 106 any = -1; 107 else { 108 any = 1; 109 acc *= base; 110 acc += c; 111 } 112 } 113 if (any < 0) { 114 acc = neg ? INTMAX_MIN : INTMAX_MAX; 115 errno = ERANGE; 116 } else if (!any) { 117 noconv: 118 errno = EINVAL; 119 } else if (neg) 120 acc = -acc; 121 if (endptr != NULL) 122 *endptr = (wchar_t *)(any ? s - 1 : nptr); 123 return (acc); 124 } 125