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#if defined(LIBC_SCCS) && !defined(lint) 31static char sccsid[] = "from @(#)strtoul.c 8.1 (Berkeley) 6/4/93"; 32#endif /* LIBC_SCCS and not lint */ 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: src/lib/libc/stdlib/strtoumax.c,v 1.11 2007/01/09 00:28:10 imp Exp $"); 35 36#include "xlocale_private.h" 37 38#include <ctype.h> 39#include <errno.h> 40#include <stdlib.h> 41#include <inttypes.h> 42 43/* 44 * Convert a string to a uintmax_t integer. 45 * 46 * Assumes that the upper and lower case 47 * alphabets and digits are each contiguous. 48 */ 49uintmax_t 50strtoumax_l(const char * __restrict nptr, char ** __restrict endptr, int base, 51 locale_t loc) 52{ 53 const char *s; 54 uintmax_t acc; 55 char c; 56 uintmax_t cutoff; 57 int neg, any, cutlim; 58 59 NORMALIZE_LOCALE(loc); 60 /* 61 * See strtoimax for comments as to the logic used. 62 */ 63 s = nptr; 64 do { 65 c = *s++; 66 } while (isspace_l((unsigned char)c, loc)); 67 if (c == '-') { 68 neg = 1; 69 c = *s++; 70 } else { 71 neg = 0; 72 if (c == '+') 73 c = *s++; 74 } 75 if ((base == 0 || base == 16) && 76 c == '0' && (*s == 'x' || *s == 'X') && 77 ((s[1] >= '0' && s[1] <= '9') || 78 (s[1] >= 'A' && s[1] <= 'F') || 79 (s[1] >= 'a' && s[1] <= 'f'))) { 80 c = s[1]; 81 s += 2; 82 base = 16; 83 } 84 if (base == 0) 85 base = c == '0' ? 8 : 10; 86 acc = any = 0; 87 if (base < 2 || base > 36) 88 goto noconv; 89 90 cutoff = UINTMAX_MAX / base; 91 cutlim = UINTMAX_MAX % base; 92 for ( ; ; c = *s++) { 93 if (c >= '0' && c <= '9') 94 c -= '0'; 95 else if (c >= 'A' && c <= 'Z') 96 c -= 'A' - 10; 97 else if (c >= 'a' && c <= 'z') 98 c -= 'a' - 10; 99 else 100 break; 101 if (c >= base) 102 break; 103 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 104 any = -1; 105 else { 106 any = 1; 107 acc *= base; 108 acc += c; 109 } 110 } 111 if (any < 0) { 112 acc = UINTMAX_MAX; 113 errno = ERANGE; 114 } else if (!any) { 115noconv: 116 errno = EINVAL; 117 } else if (neg) 118 acc = -acc; 119 if (endptr != NULL) 120 *endptr = (char *)(any ? s - 1 : nptr); 121 return (acc); 122} 123 124uintmax_t 125strtoumax(const char * __restrict nptr, char ** __restrict endptr, int base) 126{ 127 return strtoumax_l(nptr, endptr, base, __current_locale()); 128} 129