discord-rpc/include/discord-rpc.h

#pragma once
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct DiscordRichPresence {
    const char* state; /* max 128 bytes */
    const char* details; /* max 128 bytes */
    int64_t startTimestamp;
    int64_t endTimestamp;
    const char* largeImageKey; /* max 32 bytes */
    const char* largeImageText; /* max 128 bytes */
    const char* smallImageKey; /* max 32 bytes */
    const char* smallImageText; /* max 128 bytes */
    const char* partyId; /* max 128 bytes */
    int partySize;
    int partyMax;
    const char* matchSecret; /* max 128 bytes */
    const char* joinSecret; /* max 128 bytes */
    const char* spectateSecret; /* max 128 bytes */
    int8_t instance;
} DiscordRichPresence;

typedef struct DiscordEventHandlers {
    void (*ready)();
    void (*disconnected)(int errorCode, const char* message);
    void (*errored)(int errorCode, const char* message);
    void (*joinGame)(const char* joinSecret);
    void (*spectateGame)(const char* spectateSecret);
} DiscordEventHandlers;

void Discord_Initialize(const char* applicationId,
                        DiscordEventHandlers* handlers,
                        int autoRegister);
void Discord_Shutdown();

/* checks for incoming messages, dispatches callbacks */
void Discord_RunCallbacks();

/* If you disable the lib starting its own io thread, you'll need to call this from your own */
#ifdef DISCORD_DISABLE_IO_THREAD
void Discord_UpdateConnection();
#endif

void Discord_UpdatePresence(const DiscordRichPresence* presence);

#ifdef __cplusplus
} /* extern "C" */
#endif