1b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes/* $OpenBSD: strtoumax.c,v 1.2 2014/09/13 20:10:12 schwarze Exp $ */ 2b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes/* 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 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 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <ctype.h> 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <errno.h> 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <inttypes.h> 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Convert a string to a uintmax_t. 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Ignores `locale' stuff. Assumes that the upper and lower case 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * alphabets and digits are each contiguous. 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectuintmax_t 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstrtoumax(const char *nptr, char **endptr, int base) 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project const char *s; 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project uintmax_t acc, cutoff; 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int c; 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project int neg, any, cutlim; 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project /* 50b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes * See strtoimax for comments as to the logic used. 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 52b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes if (base < 0 || base == 1 || base > 36) { 53b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes if (endptr != 0) 54b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes *endptr = (char *)nptr; 55b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes errno = EINVAL; 56b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes return 0; 57b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes } 58b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s = nptr; 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project do { 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = (unsigned char) *s++; 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } while (isspace(c)); 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c == '-') { 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project neg = 1; 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = *s++; 66b05ec5ae933987e6b4a4f6a318cb13e035ad33e9Elliott Hughes } else { 671dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project neg = 0; 681dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c == '+') 691dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = *s++; 701dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 711dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if ((base == 0 || base == 16) && 721dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c == '0' && (*s == 'x' || *s == 'X')) { 731dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c = s[1]; 741dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project s += 2; 751dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project base = 16; 761dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 771dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (base == 0) 781dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project base = c == '0' ? 8 : 10; 791dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 800133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes cutoff = UINTMAX_MAX / (uintmax_t)base; 810133944b09d1c0a35041f7a41eb6bfb660144f4fElliott Hughes cutlim = UINTMAX_MAX % (uintmax_t)base; 821dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project for (acc = 0, any = 0;; c = (unsigned char) *s++) { 831dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (isdigit(c)) 841dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c -= '0'; 851dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else if (isalpha(c)) 861dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project c -= isupper(c) ? 'A' - 10 : 'a' - 10; 871dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project else 881dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 891dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (c >= base) 901dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project break; 911dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (any < 0) 921dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project continue; 931dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (acc > cutoff || (acc == cutoff && c > cutlim)) { 941dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = -1; 951dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc = UINTMAX_MAX; 961dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project errno = ERANGE; 971dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 981dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project any = 1; 991dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc *= (uintmax_t)base; 1001dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc += c; 1011dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1021dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 1031dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (neg && any > 0) 1041dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project acc = -acc; 1051dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (endptr != 0) 1061dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project *endptr = (char *) (any ? s - 1 : nptr); 1071dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (acc); 1081dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 109