10133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes/* $OpenBSD: strtoll.c,v 1.7 2013/03/28 18:09:38 martynas Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 30133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * Copyright (c) 1992 The Regents of the University of California. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 3. Neither the name of the University nor the names of its contributors 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * may be used to endorse or promote products derived from this software 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * without specific prior written permission. 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 310133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes#include <sys/types.h> 320133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <ctype.h> 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <limits.h> 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdlib.h> 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 390133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * Convert a string to a long long. 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Ignores `locale' stuff. Assumes that the upper and lower case 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * alphabets and digits are each contiguous. 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 440133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hugheslong long 450133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughesstrtoll(const char *nptr, char **endptr, int base) 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *s; 480133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes long long acc, cutoff; 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int c; 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int neg, any, cutlim; 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Skip white space and pick up leading +/- sign if any. 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * If base is 0, allow 0x for hex and 0 for octal, else 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * assume decimal; if base is already 16, allow 0x. 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = nptr; 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project do { 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = (unsigned char) *s++; 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } while (isspace(c)); 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c == '-') { 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project neg = 1; 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = *s++; 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project neg = 0; 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c == '+') 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = *s++; 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((base == 0 || base == 16) && 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c == '0' && (*s == 'x' || *s == 'X')) { 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = s[1]; 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s += 2; 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project base = 16; 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (base == 0) 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project base = c == '0' ? 8 : 10; 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Compute the cutoff value between legal numbers and illegal 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * numbers. That is the largest legal value, divided by the 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * base. An input number that is greater than this value, if 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * followed by a legal input character, is too big. One that 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * is equal to this value may be valid or not; the limit 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * between valid and invalid numbers is then based on the last 850133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * digit. For instance, if the range for long longs is 860133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * [-9223372036854775808..9223372036854775807] and the input base 870133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * is 10, cutoff will be set to 922337203685477580 and cutlim to 880133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * either 7 (neg==0) or 8 (neg==1), meaning that if we have 890133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * accumulated a value > 922337203685477580, or equal but the 900133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * next digit is > 7 (or 8), the number is too big, and we will 910133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes * return a range error. 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Set any if any `digits' consumed; make it negative to indicate 941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * overflow. 951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 960133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes cutoff = neg ? LLONG_MIN : LLONG_MAX; 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutlim = cutoff % base; 981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutoff /= base; 991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (neg) { 1001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (cutlim > 0) { 1011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutlim -= base; 1021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutoff += 1; 1031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutlim = -cutlim; 1051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (acc = 0, any = 0;; c = (unsigned char) *s++) { 1071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (isdigit(c)) 1081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c -= '0'; 1091dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else if (isalpha(c)) 1101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c -= isupper(c) ? 'A' - 10 : 'a' - 10; 1111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 1121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 1131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c >= base) 1141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 1151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (any < 0) 1161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 1171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (neg) { 1181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (acc < cutoff || (acc == cutoff && c > cutlim)) { 1191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = -1; 1200133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes acc = LLONG_MIN; 1211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ERANGE; 1221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = 1; 1241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc *= base; 1251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc -= c; 1261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1281dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (acc > cutoff || (acc == cutoff && c > cutlim)) { 1291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = -1; 1300133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes acc = LLONG_MAX; 1311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ERANGE; 1321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 1331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = 1; 1341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc *= base; 1351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc += c; 1361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (endptr != 0) 1401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *endptr = (char *) (any ? s - 1 : nptr); 1411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (acc); 1421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 1430133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes 1440133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes__strong_alias(strtoq, strtoll); 145