Martin Slachta
46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
#pragma once
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#include "NetworkError.hpp"
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#include "tl/expected.hpp"
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#include <span>
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namespace tw::net {
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template<typename T>
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class Read {
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public:
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virtual ~Read() = default;
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virtual tl::expected<size_t, NetworkError> read_into(std::span<T> target) = 0;
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tl::expected<size_t, NetworkError> read_exact_into(std::span<std::byte> data) {
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size_t total_read = 0;
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while (total_read < data.size()) {
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auto read = this->read_into(data.subspan(total_read));
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if(!read.has_value()) {
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if(read.error().m_type == NetworkErrorType::WOULD_BLOCK) {
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continue;
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} else {
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return read;
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}
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}
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total_read += read.value();
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}
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return total_read;
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}
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tl::expected<std::vector<std::byte>, NetworkError> read_exact(size_t size) {
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std::vector<std::byte> buffer(size);
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auto result = this->read_exact_into(std::span{buffer});
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if(result.has_value()) {
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return buffer;
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}
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return tl::make_unexpected(result.error());
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}
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};
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}
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