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#pragma once
#include "common.hpp"
#include <array>
#include <cstdint>
POLYBAR_NS
/**
* Defines the binary message format for IPC communications over the IPC socket.
*
* This is an internal API, do not connect to the socket using 3rd party programs, always use `polybar-msg`.
*/
namespace ipc {
/**
* Magic string prefixed to every ipc message.
*
* THIS MUST NEVER CHANGE.
*/
static constexpr std::array<uint8_t, 7> MAGIC = {'p', 'o', 'l', 'y', 'i', 'p', 'c'};
static const string MAGIC_STR = string(reinterpret_cast<const char*>(MAGIC.data()), MAGIC.size());
static constexpr uint8_t VERSION = 0;
using type_t = uint8_t;
/**
* Message type indicating success.
*/
static constexpr type_t TYPE_OK = 0;
static constexpr type_t TYPE_ERR = 255;
union header {
struct header_data {
uint8_t magic[MAGIC.size()];
/**
* Version number of the message format.
*/
uint8_t version;
/**
* Size of the following message in bytes
*/
uint32_t size;
/**
* Type of the message that follows.
*
* Meaning of the values depend on version.
* Only TYPE_OK(0) indicate success and TYPE_ERR(255) always indicates an error, in which case the entire message
* is a string.
*/
type_t type;
} __attribute__((packed)) s;
uint8_t d[sizeof(header_data)];
};
/**
* Size of the standard header shared by all versions.
*
* THIS MUST NEVER CHANGE.
*/
static constexpr size_t HEADER_SIZE = 13;
static_assert(sizeof(header) == HEADER_SIZE, "");
static_assert(sizeof(header::header_data) == HEADER_SIZE, "");
/**
* Definitions for version 0 of the IPC message format.
*
* The format is very simple. The header defines the type (cmd or action) and the payload is the message for that type
* as a string.
*/
namespace v0 {
enum class ipc_type : type_t {
/**
* Message type for ipc commands
*/
CMD = 1,
/**
* Message type for ipc module actions
*/
ACTION = 2,
};
}
} // namespace ipc
POLYBAR_NS_END
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