mirror of https://github.com/polybar/polybar.git
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
#pragma once
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#include "common.hpp"
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#include "components/logger.hpp"
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#include "errors.hpp"
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#include "ipc/msg.hpp"
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POLYBAR_NS
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namespace ipc {
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/**
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* Decoder for the IPC message format.
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*/
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class decoder {
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public:
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DEFINE_ERROR(error);
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/**
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* Callback is called whenever a full message is received.
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* The message version, message type, and the data is passed.
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*/
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using cb = std::function<void(uint8_t, type_t, const std::vector<uint8_t>&)>;
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decoder(const logger&, cb callback);
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/**
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* Call this function whenever new data arrives.
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*
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* Will throw deocder::error in case of error.
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* If an error is thrown, this instance is closed and this function may not be called again.
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*/
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void on_read(const uint8_t* buf, size_t size);
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void close() noexcept;
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bool closed() const;
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protected:
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void process_data(const uint8_t*, size_t size);
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ssize_t process_header_data(const uint8_t*, size_t size);
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ssize_t process_msg_data(const uint8_t*, size_t size);
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ipc::header header;
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size_t to_read_header{ipc::HEADER_SIZE};
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std::vector<uint8_t> buf;
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size_t to_read_buf{0};
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cb callback;
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private:
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enum class state {
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// Waiting for header data (header does not contain full header)
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HEADER,
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// Waiting for message data (header contains valid header)
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PAYLOAD,
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CLOSED,
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} state{state::HEADER};
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const logger& m_log;
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};
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} // namespace ipc
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POLYBAR_NS_END
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