11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* $OpenBSD: strtoul.c,v 1.7 2005/08/08 08:05:37 espie Exp $ */ 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 1990 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 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <ctype.h> 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <limits.h> 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdlib.h> 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Convert a string to an unsigned long integer. 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Ignores `locale' stuff. Assumes that the upper and lower case 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * alphabets and digits are each contiguous. 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectunsigned long 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstrtoul(const char *nptr, char **endptr, int base) 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *s; 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project unsigned long acc, cutoff; 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int c; 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int neg, any, cutlim; 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * See strtol for comments as to the logic used. 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = nptr; 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project do { 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = (unsigned char) *s++; 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } while (isspace(c)); 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c == '-') { 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project neg = 1; 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = *s++; 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project neg = 0; 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c == '+') 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = *s++; 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((base == 0 || base == 16) && 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c == '0' && (*s == 'x' || *s == 'X')) { 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = s[1]; 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s += 2; 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project base = 16; 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (base == 0) 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project base = c == '0' ? 8 : 10; 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutoff = ULONG_MAX / (unsigned long)base; 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project cutlim = ULONG_MAX % (unsigned long)base; 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (acc = 0, any = 0;; c = (unsigned char) *s++) { 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (isdigit(c)) 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c -= '0'; 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else if (isalpha(c)) 801dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c -= isupper(c) ? 'A' - 10 : 'a' - 10; 811dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c >= base) 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (any < 0) 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (acc > cutoff || (acc == cutoff && c > cutlim)) { 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = -1; 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc = ULONG_MAX; 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ERANGE; 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = 1; 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc *= (unsigned long)base; 941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc += c; 951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (neg && any > 0) 981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc = -acc; 991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (endptr != 0) 1001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *endptr = (char *) (any ? s - 1 : nptr); 1011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (acc); 1021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 103