11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 5227753Stheraven * Copyright (c) 2011 The FreeBSD Foundation 6227753Stheraven * All rights reserved. 7227753Stheraven * Portions of this software were developed by David Chisnall 8227753Stheraven * under sponsorship from the FreeBSD Foundation. 9227753Stheraven * 101573Srgrimes * Redistribution and use in source and binary forms, with or without 111573Srgrimes * modification, are permitted provided that the following conditions 121573Srgrimes * are met: 131573Srgrimes * 1. Redistributions of source code must retain the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer. 151573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 161573Srgrimes * notice, this list of conditions and the following disclaimer in the 171573Srgrimes * documentation and/or other materials provided with the distribution. 18251672Semaste * 3. Neither the name of the University nor the names of its contributors 191573Srgrimes * may be used to endorse or promote products derived from this software 201573Srgrimes * without specific prior written permission. 211573Srgrimes * 221573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 231573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 241573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 251573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 261573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 271573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 281573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 291573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 301573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 311573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 321573Srgrimes * SUCH DAMAGE. 331573Srgrimes */ 341573Srgrimes 351573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 361573Srgrimesstatic char sccsid[] = "@(#)strtol.c 8.1 (Berkeley) 6/4/93"; 371573Srgrimes#endif /* LIBC_SCCS and not lint */ 3892986Sobrien#include <sys/cdefs.h> 3992986Sobrien__FBSDID("$FreeBSD$"); 401573Srgrimes 411573Srgrimes#include <limits.h> 421573Srgrimes#include <ctype.h> 431573Srgrimes#include <errno.h> 441573Srgrimes#include <stdlib.h> 45227753Stheraven#include "xlocale_private.h" 461573Srgrimes 471573Srgrimes 481573Srgrimes/* 491573Srgrimes * Convert a string to a long integer. 501573Srgrimes * 5182975Sache * Assumes that the upper and lower case 521573Srgrimes * alphabets and digits are each contiguous. 531573Srgrimes */ 541573Srgrimeslong 55227753Stheravenstrtol_l(const char * __restrict nptr, char ** __restrict endptr, int base, 56227753Stheraven locale_t locale) 571573Srgrimes{ 5887016Sache const char *s; 5987016Sache unsigned long acc; 6087494Sache char c; 6187016Sache unsigned long cutoff; 6287494Sache int neg, any, cutlim; 63227753Stheraven FIX_LOCALE(locale); 641573Srgrimes 651573Srgrimes /* 661573Srgrimes * Skip white space and pick up leading +/- sign if any. 671573Srgrimes * If base is 0, allow 0x for hex and 0 for octal, else 681573Srgrimes * assume decimal; if base is already 16, allow 0x. 691573Srgrimes */ 7082975Sache s = nptr; 711573Srgrimes do { 721573Srgrimes c = *s++; 73227753Stheraven } while (isspace_l((unsigned char)c, locale)); 741573Srgrimes if (c == '-') { 751573Srgrimes neg = 1; 761573Srgrimes c = *s++; 7782975Sache } else { 7882975Sache neg = 0; 7982975Sache if (c == '+') 8082975Sache c = *s++; 8182975Sache } 821573Srgrimes if ((base == 0 || base == 16) && 83140536Sache c == '0' && (*s == 'x' || *s == 'X') && 84140577Sache ((s[1] >= '0' && s[1] <= '9') || 85140577Sache (s[1] >= 'A' && s[1] <= 'F') || 86140577Sache (s[1] >= 'a' && s[1] <= 'f'))) { 871573Srgrimes c = s[1]; 881573Srgrimes s += 2; 891573Srgrimes base = 16; 901573Srgrimes } 911573Srgrimes if (base == 0) 921573Srgrimes base = c == '0' ? 8 : 10; 9382982Sache acc = any = 0; 9487023Sfenner if (base < 2 || base > 36) 9582975Sache goto noconv; 961573Srgrimes 971573Srgrimes /* 981573Srgrimes * Compute the cutoff value between legal numbers and illegal 991573Srgrimes * numbers. That is the largest legal value, divided by the 1001573Srgrimes * base. An input number that is greater than this value, if 1011573Srgrimes * followed by a legal input character, is too big. One that 1021573Srgrimes * is equal to this value may be valid or not; the limit 1031573Srgrimes * between valid and invalid numbers is then based on the last 1041573Srgrimes * digit. For instance, if the range for longs is 1051573Srgrimes * [-2147483648..2147483647] and the input base is 10, 1061573Srgrimes * cutoff will be set to 214748364 and cutlim to either 1071573Srgrimes * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated 1081573Srgrimes * a value > 214748364, or equal but the next digit is > 7 (or 8), 1091573Srgrimes * the number is too big, and we will return a range error. 1101573Srgrimes * 11182975Sache * Set 'any' if any `digits' consumed; make it negative to indicate 1121573Srgrimes * overflow. 1131573Srgrimes */ 11487016Sache cutoff = neg ? (unsigned long)-(LONG_MIN + LONG_MAX) + LONG_MAX 11582975Sache : LONG_MAX; 11682975Sache cutlim = cutoff % base; 11782975Sache cutoff /= base; 11882982Sache for ( ; ; c = *s++) { 11987494Sache if (c >= '0' && c <= '9') 12087494Sache c -= '0'; 12187494Sache else if (c >= 'A' && c <= 'Z') 12287494Sache c -= 'A' - 10; 12387494Sache else if (c >= 'a' && c <= 'z') 12487494Sache c -= 'a' - 10; 1251573Srgrimes else 1261573Srgrimes break; 12787494Sache if (c >= base) 1281573Srgrimes break; 12987494Sache if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 1301573Srgrimes any = -1; 1311573Srgrimes else { 1321573Srgrimes any = 1; 1331573Srgrimes acc *= base; 13487494Sache acc += c; 1351573Srgrimes } 1361573Srgrimes } 1371573Srgrimes if (any < 0) { 1381573Srgrimes acc = neg ? LONG_MIN : LONG_MAX; 1391573Srgrimes errno = ERANGE; 14082975Sache } else if (!any) { 14182975Sachenoconv: 14282975Sache errno = EINVAL; 1431573Srgrimes } else if (neg) 1441573Srgrimes acc = -acc; 14582975Sache if (endptr != NULL) 1461573Srgrimes *endptr = (char *)(any ? s - 1 : nptr); 1471573Srgrimes return (acc); 1481573Srgrimes} 149227753Stheravenlong 150227753Stheravenstrtol(const char * __restrict nptr, char ** __restrict endptr, int base) 151227753Stheraven{ 152227753Stheraven return strtol_l(nptr, endptr, base, __get_locale()); 153227753Stheraven} 154227753Stheravenlong double 155227753Stheravenstrtold(const char * __restrict nptr, char ** __restrict endptr) 156227753Stheraven{ 157227753Stheraven return strtold_l(nptr, endptr, __get_locale()); 158227753Stheraven} 159