// Derived from Sony PS5 WebKit 11.x revision 80f77e94c6, Source/WTF/wtf/UUID.cpp
/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
*     * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// Derived from Sony PS5 WebKit 11.x revision 80f77e94c6, Source/WTF/wtf/URL.cpp
/*
 * Copyright (C) 2004-2020 Apple Inc. All rights reserved.
 * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// Derived from Sony PS5 WebKit 11.x revision 80f77e94c6, Source/WTF/wtf/URLParser.cpp
/*
 * Copyright (C) 2016-2020 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "prx/libSceNKWebKit/include/UrlHelpers.hpp"

#include <cstdint>
#include <optional>
#include <stdexcept>
#include <string>

namespace {

using NKWebKit::UrlAbi::StringView;

char16_t CharacterAt(StringView value, std::uint32_t index) {
    if (value.is8Bit) return static_cast<const std::uint8_t*>(value.characters)[index];
    return static_cast<const char16_t*>(value.characters)[index];
}

std::u16string CopyString(StringView value) {
    if (!value.characters && value.length) throw std::invalid_argument("WTF::StringView: null characters with nonzero length");
    std::u16string result;
    result.reserve(value.length);
    for (std::uint32_t i = 0; i < value.length; ++i) result.push_back(CharacterAt(value, i));
    return result;
}

bool AsciiWhitespace(char16_t value) {
    return value == ' ' || (value >= '\t' && value <= '\r');
}

std::optional<std::uint64_t> HexGroup(StringView value, std::uint32_t start, std::uint32_t count, bool rejectLeadingPlus) {
    std::uint32_t end = start + count;
    if (rejectLeadingPlus && CharacterAt(value, start) == '+') return std::nullopt;
    while (start < end && AsciiWhitespace(CharacterAt(value, start))) ++start;
    if (start < end && CharacterAt(value, start) == '+') ++start;
    std::uint64_t result = 0;
    bool haveDigits = false;
    while (start < end) {
        const char16_t c = CharacterAt(value, start);
        std::uint32_t digit = 0;
        if (c >= '0' && c <= '9') digit = c - '0';
        else if (c >= 'a' && c <= 'f') digit = c - 'a' + 10;
        else if (c >= 'A' && c <= 'F') digit = c - 'A' + 10;
        else break;
        haveDigits = true;
        result = result * 16 + digit;
        ++start;
    }
    if (!haveDigits) return std::nullopt;
    while (start < end && AsciiWhitespace(CharacterAt(value, start))) ++start;
    if (start != end) return std::nullopt;
    return result;
}

bool UuidVersion4(StringView value) {
    if (value.length != 36) return false;
    if (!value.characters) throw std::invalid_argument("WTF::StringView: null UUID characters");
    for (const auto separator : {8u, 13u, 18u, 23u}) {
        if (CharacterAt(value, separator) != '-') return false;
    }
    const auto first = HexGroup(value, 0, 8, true);
    const auto second = HexGroup(value, 9, 4, true);
    const auto third = HexGroup(value, 14, 4, false);
    const auto fourth = HexGroup(value, 19, 4, true);
    const auto fifth = HexGroup(value, 24, 12, true);
    if (!first || !second || !third || !fourth || !fifth) return false;
    return ((*third & 0xf000u) == 0x4000u) && ((*fourth & 0xc000u) == 0x8000u);
}

std::optional<std::uint16_t> DefaultPort(StringView protocol) {
    if (!protocol.characters && protocol.length) throw std::invalid_argument("WTF::StringView: null protocol characters");
    const auto key = CopyString(protocol);
    if (key == u"ftp") return 21;
    if (key == u"http" || key == u"ws") return 80;
    if (key == u"https" || key == u"wss") return 443;
    return std::nullopt;
}

}

extern "C" {

bool APS5_VABI _ZN3WTF14isVersion4UUIDENS_10StringViewE(StringView value) {
    return UuidVersion4(value);
}

bool APS5_VABI _ZN3WTF24isDefaultPortForProtocolEtNS_10StringViewE(std::uint16_t port, StringView protocol) {
    return DefaultPort(protocol) == port;
}

}