mirror of
https://github.com/boykopovar/AnyPS5.git
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402 lines
16 KiB
C++
402 lines
16 KiB
C++
/*
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* Copyright (C) 1999-2000 Harri Porten ([email protected])
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* Copyright (C) 2006-2019 Apple Inc. All rights reserved.
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* Copyright (C) 2009 Google Inc. All rights reserved.
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* Copyright (C) 2007-2009 Torch Mobile, Inc.
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* Copyright (C) 2010 &yet, LLC. ([email protected])
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Alternatively, the contents of this file may be used under the terms
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* of either the Mozilla Public License Version 1.1, found at
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* http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
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* License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
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* (the "GPL"), in which case the provisions of the MPL or the GPL are
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* applicable instead of those above. If you wish to allow use of your
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* version of this file only under the terms of one of those two
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* licenses (the MPL or the GPL) and not to allow others to use your
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* version of this file under the LGPL, indicate your decision by
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* deletingthe provisions above and replace them with the notice and
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* other provisions required by the MPL or the GPL, as the case may be.
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* If you do not delete the provisions above, a recipient may use your
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* version of this file under any of the LGPL, the MPL or the GPL.
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* Copyright 2006-2008 the V8 project authors. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// Derived from Source/WTF/wtf/DateMath.cpp (WebKit c55364d53f97)
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#include "prx/libSceNKWebKit/include/InventoryExports.hpp"
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#include "prx/libc/include/Api.hpp"
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#include <cmath>
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#include <cstddef>
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#include <cstdint>
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#include <cstring>
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#include <limits>
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#include <optional>
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#include <stdexcept>
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#include <string>
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namespace {
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constexpr double SecondsPerMinute = 60.0;
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constexpr double SecondsPerHour = SecondsPerMinute * 60.0;
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constexpr double SecondsPerDay = SecondsPerHour * 24.0;
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constexpr double MsPerSecond = 1000.0;
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constexpr std::int64_t LongMin = std::numeric_limits<std::int64_t>::min();
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constexpr std::int64_t LongMax = std::numeric_limits<std::int64_t>::max();
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constexpr int IntMin = std::numeric_limits<int>::min();
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constexpr int IntMax = std::numeric_limits<int>::max();
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constexpr int FirstDayOfMonth[2][12] = {
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{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334},
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{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335},
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};
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struct KnownZone {
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const char* name;
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std::size_t length;
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int offset;
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};
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constexpr KnownZone KnownZones[] = {
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{"ut", 2, 0},
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{"gmt", 3, 0},
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{"est", 3, -300},
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{"edt", 3, -240},
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{"cst", 3, -360},
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{"cdt", 3, -300},
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{"mst", 3, -420},
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{"mdt", 3, -360},
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{"pst", 3, -480},
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{"pdt", 3, -420},
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};
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double NaN() {
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return std::numeric_limits<double>::quiet_NaN();
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}
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bool IsSpace(char character) {
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return character <= ' ' && (character == ' ' || (character <= 0xD && character >= 0x9));
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}
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bool IsDigit(char character) {
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return character >= '0' && character <= '9';
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}
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char ToLower(char character) {
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return static_cast<char>(character | ((character >= 'A' && character <= 'Z') << 5));
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}
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bool StartsWithLetters(const char* string, const char* letters, std::size_t length) {
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for (std::size_t i = 0; i < length; ++i) {
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if (static_cast<char>(string[i] | 0x20) != letters[i]) return false;
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}
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return true;
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}
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bool IsLeapYear(int year) {
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if (year % 4 != 0) return false;
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if (year % 400 == 0) return true;
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if (year % 100 == 0) return false;
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return true;
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}
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double DaysFrom1970ToYear(int year) {
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const double yearMinusOne = year - 1;
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const double yearsToAddBy4Rule = std::floor(yearMinusOne / 4.0) - 1970 / 4;
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const double yearsToExcludeBy100Rule = std::floor(yearMinusOne / 100.0) - 1970 / 100;
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const double yearsToAddBy400Rule = std::floor(yearMinusOne / 400.0) - 1970 / 400;
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return 365.0 * (year - 1970.0) + yearsToAddBy4Rule - yearsToExcludeBy100Rule + yearsToAddBy400Rule;
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}
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double YmdhmsToSeconds(int year, std::int64_t month, std::int64_t day, std::int64_t hour, std::int64_t minute, double second) {
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const int monthDay = FirstDayOfMonth[IsLeapYear(year)][month - 1];
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const double yearDays = DaysFrom1970ToYear(year);
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std::int64_t days = 0;
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if (__builtin_add_overflow(static_cast<std::int64_t>(monthDay), day, &days) || __builtin_sub_overflow(days, std::int64_t{1}, &days))
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throw std::overflow_error("WTF date parsing: the day count overflows long, which is undefined in WebKit");
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const double dateSeconds = second + minute * SecondsPerMinute + hour * SecondsPerHour + (days + yearDays) * SecondsPerDay;
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if (dateSeconds < -8640000000000.0 || dateSeconds > 8640000000000.0) return NaN();
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return dateSeconds;
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}
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void SkipSpacesAndComments(const char*& string) {
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int nesting = 0;
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char character;
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while ((character = *string)) {
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if (!IsSpace(character)) {
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if (character == '(') {
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if (nesting == IntMax) throw std::overflow_error("WTF date parsing: the comment nesting overflows int, which is undefined in WebKit");
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++nesting;
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} else if (character == ')' && nesting > 0) {
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--nesting;
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} else if (nesting == 0) {
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break;
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}
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}
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++string;
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}
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}
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int FindMonth(const char* monthString) {
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char needle[4];
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for (int i = 0; i < 3; ++i) {
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if (!*monthString) return -1;
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needle[i] = ToLower(*monthString++);
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}
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needle[3] = '\0';
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const char* haystack = "janfebmaraprmayjunjulaugsepoctnovdec";
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const char* found = std::strstr(haystack, needle);
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if (found) {
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const auto position = static_cast<int>(found - haystack);
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if (position % 3 == 0) return position / 3;
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}
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return -1;
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}
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bool ParseInt(const char* string, char** stopPosition, int* result) {
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const std::int64_t value = strtol_nid_postfix(string, stopPosition, 10);
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if (string == *stopPosition || value <= IntMin || value >= IntMax) return false;
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*result = static_cast<int>(value);
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return true;
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}
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bool ParseLong(const char* string, char** stopPosition, std::int64_t* result) {
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*result = strtol_nid_postfix(string, stopPosition, 10);
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return !(string == *stopPosition || *result == LongMin || *result == LongMax);
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}
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void RequireArguments(const char* dateString, const bool* isLocalTime, const char* function) {
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if (isLocalTime == nullptr) throw std::invalid_argument(std::string(function) + ": null isLocalTime reference faults in WebKit");
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if (dateString == nullptr) throw std::invalid_argument(std::string(function) + ": null date string faults in WebKit");
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}
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double ParseDate(const char* dateString, bool& isLocalTime) {
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isLocalTime = true;
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int offset = 0;
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SkipSpacesAndComments(dateString);
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std::int64_t month = -1;
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const char* wordStart = dateString;
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while (*dateString && !IsDigit(*dateString)) {
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if (IsSpace(*dateString) || *dateString == '(') {
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if (dateString - wordStart >= 3) month = FindMonth(wordStart);
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SkipSpacesAndComments(dateString);
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wordStart = dateString;
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} else {
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++dateString;
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}
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}
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if (month == -1 && wordStart != dateString) month = FindMonth(wordStart);
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SkipSpacesAndComments(dateString);
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if (!*dateString) return NaN();
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char* end = nullptr;
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std::int64_t day;
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if (!ParseLong(dateString, &end, &day)) return NaN();
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dateString = end;
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if (day < 0) return NaN();
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std::optional<int> year;
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if (day > 31) {
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if (*dateString != '/') return NaN();
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if (!*++dateString) return NaN();
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if (day <= IntMin || day >= IntMax) return NaN();
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year = static_cast<int>(day);
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if (!ParseLong(dateString, &end, &month)) return NaN();
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month -= 1;
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dateString = end;
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if (*dateString++ != '/' || !*dateString) return NaN();
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if (!ParseLong(dateString, &end, &day)) return NaN();
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dateString = end;
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} else if (*dateString == '/' && month == -1) {
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++dateString;
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month = day - 1;
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if (!ParseLong(dateString, &end, &day)) return NaN();
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if (day < 1 || day > 31) return NaN();
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dateString = end;
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if (*dateString == '/') ++dateString;
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if (!*dateString) return NaN();
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} else {
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if (*dateString == '-') ++dateString;
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SkipSpacesAndComments(dateString);
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if (*dateString == ',') ++dateString;
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if (month == -1) {
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month = FindMonth(dateString);
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if (month == -1) return NaN();
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while (*dateString && *dateString != '-' && *dateString != ',' && !IsSpace(*dateString)) ++dateString;
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if (!*dateString) return NaN();
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if (*dateString != '-' && *dateString != '/' && *dateString != ',' && !IsSpace(*dateString)) return NaN();
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++dateString;
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}
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}
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if (month < 0 || month > 11) return NaN();
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if (*dateString && !year) {
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int result = 0;
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if (!ParseInt(dateString, &end, &result)) return NaN();
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year = result;
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}
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std::int64_t hour = 0;
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std::int64_t minute = 0;
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std::int64_t second = 0;
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if (!*end) {
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dateString = end;
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} else {
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if (!(IsSpace(*end) || *end == ',')) {
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if (*end != ':') return NaN();
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year.reset();
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} else {
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dateString = ++end;
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SkipSpacesAndComments(dateString);
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}
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ParseLong(dateString, &end, &hour);
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if (end != dateString) {
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dateString = end;
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if (hour < 0 || hour > 23) return NaN();
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if (!*dateString) return NaN();
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if (*dateString++ != ':') return NaN();
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if (!ParseLong(dateString, &end, &minute)) return NaN();
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dateString = end;
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if (minute < 0 || minute > 59) return NaN();
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if (*dateString && *dateString != ':' && !IsSpace(*dateString)) return NaN();
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if (*dateString == ':') {
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++dateString;
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if (!ParseLong(dateString, &end, &second)) return NaN();
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dateString = end;
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if (second < 0 || second > 59) return NaN();
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}
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SkipSpacesAndComments(dateString);
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if (StartsWithLetters(dateString, "am", 2)) {
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if (hour > 12) return NaN();
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if (hour == 12) hour = 0;
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dateString += 2;
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SkipSpacesAndComments(dateString);
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} else if (StartsWithLetters(dateString, "pm", 2)) {
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if (hour > 12) return NaN();
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if (hour != 12) hour += 12;
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dateString += 2;
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SkipSpacesAndComments(dateString);
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}
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}
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}
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if (IsDigit(*dateString) && !year) {
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int result = 0;
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if (!ParseInt(dateString, &end, &result)) return NaN();
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year = result;
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dateString = end;
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SkipSpacesAndComments(dateString);
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}
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if (*dateString) {
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if (StartsWithLetters(dateString, "gmt", 3) || StartsWithLetters(dateString, "utc", 3)) {
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dateString += 3;
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isLocalTime = false;
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}
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if (*dateString == '+' || *dateString == '-') {
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int zone;
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if (!ParseInt(dateString, &end, &zone)) return NaN();
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dateString = end;
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if (zone < -9959 || zone > 9959) return NaN();
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const int sign = zone < 0 ? -1 : 1;
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zone = zone < 0 ? -zone : zone;
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if (*dateString != ':') {
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if (zone >= 24)
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offset = ((zone / 100) * 60 + (zone % 100)) * sign;
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else
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offset = zone * 60 * sign;
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} else {
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++dateString;
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int zoneMinutes;
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if (!ParseInt(dateString, &end, &zoneMinutes)) return NaN();
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dateString = end;
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int total = 0;
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if (__builtin_add_overflow(zone * 60, zoneMinutes, &total))
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throw std::overflow_error("WTF date parsing: the time zone offset overflows int, which is undefined in WebKit");
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offset = total * sign;
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}
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isLocalTime = false;
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} else {
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for (const auto& zone : KnownZones) {
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if (StartsWithLetters(dateString, zone.name, zone.length)) {
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offset = zone.offset;
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dateString += zone.length;
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isLocalTime = false;
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break;
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}
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}
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}
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}
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SkipSpacesAndComments(dateString);
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if (*dateString && !year) {
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int result = 0;
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if (!ParseInt(dateString, &end, &result)) return NaN();
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year = result;
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dateString = end;
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SkipSpacesAndComments(dateString);
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}
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if (*dateString) return NaN();
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if (year) {
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int yearValue = *year;
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if (yearValue >= 0 && yearValue < 100) yearValue += yearValue < 50 ? 2000 : 1900;
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year = yearValue;
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} else {
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year = 2000;
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}
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const double dateSeconds = YmdhmsToSeconds(*year, month + 1, day, hour, minute, static_cast<double>(second)) - offset * SecondsPerMinute;
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return dateSeconds * MsPerSecond;
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}
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}
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extern "C" {
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double APS5_VABI _ZN3WTF37parseDateFromNullTerminatedCharactersEPKcRb(const char* dateString, bool* isLocalTime) {
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RequireArguments(dateString, isLocalTime, __func__);
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return ParseDate(dateString, *isLocalTime);
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}
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}
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