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https://github.com/SerenityOS/serenity
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d22d29a29a
This container represents a universally unique identifier. This will be used later in the kernel for GUID partitions.
93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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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 met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (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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#include <AK/AllOf.h>
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#include <AK/Hex.h>
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#include <AK/StringBuilder.h>
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#include <AK/UUID.h>
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namespace AK {
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UUID::UUID()
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{
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}
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UUID::UUID(Array<u8, 16> uuid_buffer)
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{
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uuid_buffer.span().copy_to(m_uuid_buffer);
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}
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void UUID::convert_string_view_to_uuid(const StringView& uuid_string_view)
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{
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ASSERT(uuid_string_view.length() == 36);
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auto first_unit = decode_hex(uuid_string_view.substring_view(0, 8));
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auto second_unit = decode_hex(uuid_string_view.substring_view(9, 4));
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auto third_unit = decode_hex(uuid_string_view.substring_view(14, 4));
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auto fourth_unit = decode_hex(uuid_string_view.substring_view(19, 4));
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auto fifth_unit = decode_hex(uuid_string_view.substring_view(24, 12));
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m_uuid_buffer.span().overwrite(0, first_unit.value().data(), first_unit.value().size());
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m_uuid_buffer.span().overwrite(4, second_unit.value().data(), second_unit.value().size());
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m_uuid_buffer.span().overwrite(6, third_unit.value().data(), third_unit.value().size());
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m_uuid_buffer.span().overwrite(8, fourth_unit.value().data(), fourth_unit.value().size());
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m_uuid_buffer.span().overwrite(10, fifth_unit.value().data(), fifth_unit.value().size());
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}
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UUID::UUID(const StringView& uuid_string_view)
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{
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convert_string_view_to_uuid(uuid_string_view);
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}
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String UUID::to_string() const
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{
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StringBuilder builder(36);
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builder.append(encode_hex(m_uuid_buffer.span().trim(4)).view());
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builder.append('-');
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builder.append(encode_hex(m_uuid_buffer.span().slice(4).trim(2)).view());
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builder.append('-');
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builder.append(encode_hex(m_uuid_buffer.span().slice(6).trim(2)).view());
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builder.append('-');
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builder.append(encode_hex(m_uuid_buffer.span().slice(8).trim(2)).view());
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builder.append('-');
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builder.append(encode_hex(m_uuid_buffer.span().slice(10).trim(6)).view());
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return builder.to_string();
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}
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bool UUID::operator==(const UUID& other) const
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{
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for (size_t index = 0; index < 16; index++) {
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if (m_uuid_buffer[index] != other.m_uuid_buffer[index])
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return false;
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}
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return true;
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}
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bool UUID::is_zero() const
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{
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return all_of(m_uuid_buffer.begin(), m_uuid_buffer.end(), [](const auto octet) { return octet == 0; });
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}
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}
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