52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
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/* This file is part of the sirit project.
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* Copyright (c) 2019 sirit
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* This software may be used and distributed according to the terms of the
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* 3-Clause BSD License
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*/
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#include "stream.h"
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namespace Sirit {
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Stream::Stream(std::vector<u32>& words_) : words{words_} {}
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Stream::~Stream() = default;
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void Stream::Write(std::string_view string) {
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constexpr std::size_t word_size = 4;
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const auto size = string.size();
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const auto read = [string, size](std::size_t offset) {
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return offset < size ? static_cast<u8>(string[offset]) : u8(0);
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};
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words.reserve(words.size() + size / word_size + 1);
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for (std::size_t i = 0; i < size; i += word_size) {
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Write(read(i), read(i + 1), read(i + 2), read(i + 3));
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}
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if (size % word_size == 0) {
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Write(u32(0));
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}
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}
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void Stream::Write(u64 value) {
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const u32 dword[] = {static_cast<u32>(value), static_cast<u32>(value >> 32)};
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words.insert(std::begin(words), std::cbegin(dword), std::cend(dword));
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}
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void Stream::Write(u32 value) {
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words.push_back(value);
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}
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void Stream::Write(u16 first, u16 second) {
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const u32 word = static_cast<u32>(first) | static_cast<u32>(second) << 16;
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Write(word);
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}
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void Stream::Write(u8 first, u8 second, u8 third, u8 fourth) {
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const u32 word = static_cast<u32>(first) | static_cast<u32>(second) << 8 |
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static_cast<u32>(third) << 16 | static_cast<u32>(fourth) << 24;
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Write(word);
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}
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} // namespace Sirit
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