Fix double function declaration

* Fix code signing for macOS 10.10
- Fixes #259

* Maybe this works

.travis.yml

@@ -43,5 +43,5 @@ before_install:
 script:
     - mkdir build
     - cd build
-    - cmake -DCLANG_FORMAT_SUFFIX=$CLANG_FORMAT_SUFFIX --config Release ..
+    - cmake -DCLANG_FORMAT_SUFFIX=$CLANG_FORMAT_SUFFIX -DWARNINGS_AS_ERRORS=On --config Release ..
     - cmake --build . -- -j2

README.md

@@ -15,6 +15,64 @@ Zeroith, you should be set up to build things because you are a game developer,
 
 First, head on over to the [Discord developers site](https://discordapp.com/developers/applications/me) and make yourself an app. Keep track of `Client ID` -- you'll need it here to pass to the init function.
 
+### Unreal Engine 4 Setup
+
+To use the Rich Presense plugin with Unreal Engine Projects:
+
+1.  Download the latest [release](https://github.com/discordapp/discord-rpc/releases) for each operating system you are targeting and the zipped source code
+2.  In the source code zip, copy the UE plugin—`examples/unrealstatus/Plugins/discordrpc`—to your project's plugin directory
+3.  At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create an `Include` folder and copy `discord_rpc.h` and `discord_register.h` to it from the zip
+4.  Follow the steps below for each OS
+5.  Build your UE4 project
+6.  Launch the editor, and enable the Discord plugin.
+
+#### Windows
+
+- At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create a `Win64` folder
+- Copy `lib/discord-rpc.lib` and `bin/discord-rpc.dll` from `[RELEASE_ZIP]/win64-dynamic` to the `Win64` folder
+
+#### Mac
+
+- At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create a `Mac` folder
+- Copy `libdiscord-rpc.dylib` from `[RELEASE_ZIP]/osx-dynamic/lib` to the `Mac` folder
+
+#### Linux
+
+- At `[YOUR_UE_PROJECT]/Plugins/discordrpc/source/ThirdParty/DiscordRpcLibrary/`, create a `Linux` folder
+- Inside, create another folder `x86_64-unknown-linux-gnu`
+- Copy `libdiscord-rpc.so` from `[RELEASE_ZIP]/linux-dynamic/lib` to `Linux/x86_64-unknown-linux-gnu`
+
+### Unity Setup
+
+If you're a Unity developer looking to integrate Rich Presence into your game, follow this simple guide to get started towards success:
+
+1. Download the DLLs for any platform that you need from [our releases](https://github.com/discordapp/discord-rpc/releases)
+2. In your Unity project, create a `Plugins` folder inside your `Assets` folder if you don't already have one
+3. Copy the file `DiscordRpc.cs` from [here](https://github.com/discordapp/discord-rpc/blob/master/examples/button-clicker/Assets/DiscordRpc.cs) into your `Assets` folder. This is basically your header file for the SDK
+
+We've got our `Plugins` folder ready, so let's get platform-specific!
+
+#### Windows
+
+4. Create `x86` and `x86_64` folders inside `Assets/Plugins/`
+5. Copy `discord-rpc-win/win64-dynamic/bin/discord-rpc.dll` to `Assets/Plugins/x86_64/`
+6. Copy `discord-rpc-win/win32-dynamic/bin/discord-rpc.dll` to `Assets/Plugins/x86/`
+7. Click on both DLLs and make sure they are targetting the correct architectures in the Unity editor properties pane
+8. Done!
+
+#### MacOS
+
+4. Copy `discord-rpc-osx/osx-dynamic/lib/libdiscord-rpc.dylib` to `Assets/Plugins/`
+5. Rename `libdiscord-rpc.dylib` to `discord-rpc.bundle`
+6. Done!
+
+#### Linux
+
+4. Copy `discord-rpc-linux/linux-dynamic-lib/libdiscord-rpc.so` to `Assets/Plugins/`
+5. Done!
+
+You're ready to roll! For code examples on how to interact with the SDK using the `DiscordRpc.cs` header file, check out [our example](https://github.com/discordapp/discord-rpc/blob/master/examples/button-clicker/Assets/DiscordController.cs)
+
 ### From package
 
 Download a release package for your platform(s) -- they have subdirs with various prebuilt options, select the one you need add `/include` to your compile includes, `/lib` to your linker paths, and link with `discord-rpc`. For the dynamically linked builds, you'll need to ship the associated file along with your game.
@@ -26,6 +84,7 @@ First-eth, you'll want `CMake`. There's a few different ways to install it on yo
 To make sure it's installed correctly, type `cmake --version` into your flavor of terminal/cmd. If you get a response with a version number, you're good to go!
 
 There's a [CMake](https://cmake.org/download/) file that should be able to generate the lib for you; Sometimes I use it like this:
+
 ```sh
     cd <path to discord-rpc>
     mkdir build
@@ -33,6 +92,7 @@ There's a [CMake](https://cmake.org/download/) file that should be able to gener
     cmake .. -DCMAKE_INSTALL_PREFIX=<path to install discord-rpc to>
     cmake --build . --config Release --target install
 ```
+
 There is a wrapper build script `build.py` that runs `cmake` with a few different options.
 
 Usually, I run `build.py` to get things started, then use the generated project files as I work on things. It does depend on `click` library, so do a quick `pip install click` to make sure you have it if you want to run `build.py`.
@@ -40,20 +100,21 @@ Usually, I run `build.py` to get things started, then use the generated project
 There are some CMake options you might care about:
 
 | flag                                                                                     | default | does                                                                                                                                                  |
-|------|---------|------|
-| `ENABLE_IO_THREAD` | `ON` | When enabled, we start up a thread to do io processing, if disabled you should call `Discord_UpdateConnection` yourself.
-| `USE_STATIC_CRT` | `OFF` | (Windows) Enable to statically link the CRT, avoiding requiring users install the redistributable package. (The prebuilt binaries enable this option)
-| [`BUILD_SHARED_LIBS`](https://cmake.org/cmake/help/v3.7/variable/BUILD_SHARED_LIBS.html) | `OFF` | Build library as a DLL
+| ---------------------------------------------------------------------------------------- | ------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `ENABLE_IO_THREAD`                                                                       | `ON`    | When enabled, we start up a thread to do io processing, if disabled you should call `Discord_UpdateConnection` yourself.                              |
+| `USE_STATIC_CRT`                                                                         | `OFF`   | (Windows) Enable to statically link the CRT, avoiding requiring users install the redistributable package. (The prebuilt binaries enable this option) |
+| [`BUILD_SHARED_LIBS`](https://cmake.org/cmake/help/v3.7/variable/BUILD_SHARED_LIBS.html) | `OFF`   | Build library as a DLL                                                                                                                                |
+| `WARNINGS_AS_ERRORS`                                                                     | `OFF`   | When enabled, compiles with `-Werror` (on \*nix platforms).                                                                                           |
 
 ## Continuous Builds
 
 Why do we have three of these? Three times the fun!
 
 | CI                   | badge                                                                                                                                            |
-|----|-------|
-| TravisCI | [![Build status](https://travis-ci.org/discordapp/discord-rpc.svg?branch=master)](https://travis-ci.org/discordapp/discord-rpc)
-| AppVeyor | [![Build status](https://ci.appveyor.com/api/projects/status/qvkoc0w1c4f4b8tj?svg=true)](https://ci.appveyor.com/project/crmarsh/discord-rpc)
-| Buildkite (internal) | [![Build status](https://badge.buildkite.com/e103d79d247f6776605a15246352a04b8fd83d69211b836111.svg)](https://buildkite.com/discord/discord-rpc)
+| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
+| TravisCI             | [![Build status](https://travis-ci.org/discordapp/discord-rpc.svg?branch=master)](https://travis-ci.org/discordapp/discord-rpc)                  |
+| AppVeyor             | [![Build status](https://ci.appveyor.com/api/projects/status/qvkoc0w1c4f4b8tj?svg=true)](https://ci.appveyor.com/project/crmarsh/discord-rpc)    |
+| Buildkite (internal) | [![Build status](https://badge.buildkite.com/e103d79d247f6776605a15246352a04b8fd83d69211b836111.svg)](https://buildkite.com/discord/discord-rpc) |
 
 ## Sample: send-presence
 
@@ -78,10 +139,14 @@ Below is a table of unofficial, community-developed wrappers for and implementat
 ###### Rich Presence Wrappers and Implementations
 
 | Name                                                                      | Language                          |
-|------|----------|
-| [discord-rpc.jar](https://github.com/Vatuu/discord-rpc "Discord-RPC.jar") | Java |
+| ------------------------------------------------------------------------- | --------------------------------- |
+| [Discord RPC C#](https://github.com/Lachee/discord-rpc-csharp)            | C#                                |
+| [Discord RPC D](https://github.com/voidblaster/discord-rpc-d)             | [D](https://dlang.org/)           |
+| [discord-rpc.jar](https://github.com/Vatuu/discord-rpc 'Discord-RPC.jar') | Java                              |
 | [java-discord-rpc](https://github.com/MinnDevelopment/java-discord-rpc)   | Java                              |
 | [Discord-IPC](https://github.com/jagrosh/DiscordIPC)                      | Java                              |
 | [Discord Rich Presence](https://npmjs.org/discord-rich-presence)          | JavaScript                        |
 | [drpc4k](https://github.com/Bluexin/drpc4k)                               | [Kotlin](https://kotlinlang.org/) |
+| [lua-discordRPC](https://github.com/pfirsich/lua-discordRPC)              | LuaJIT (FFI)                      |
+| [pypresence](https://github.com/qwertyquerty/pypresence)                  | [Python](https://python.org/)     |
 | [SwordRPC](https://github.com/Azoy/SwordRPC)                              | [Swift](https://swift.org)        |

build.py

@@ -30,7 +30,7 @@ INSTALL_ROOT = os.path.join(SCRIPT_PATH, 'builds', 'install')
 def get_signtool():
     """ get path to code signing tool """
     if PLATFORM == 'win':
-        sdk_dir = os.environ['WindowsSdkDir']
+        sdk_dir = 'c:\\Program Files (x86)\\Windows Kits\\10'  # os.environ['WindowsSdkDir']
         return os.path.join(sdk_dir, 'bin', 'x86', 'signtool.exe')
     elif PLATFORM == 'osx':
         return '/usr/bin/codesign'
@@ -70,14 +70,7 @@ def cli(ctx, clean):
 @click.pass_context
 def unity(ctx):
     """ build just dynamic libs for use in unity project """
-    ctx.invoke(
-        libs,
-        clean=False,
-        static=False,
-        shared=True,
-        skip_formatter=True,
-        just_release=True
-    )
+    ctx.invoke(libs, clean=False, static=False, shared=True, skip_formatter=True, just_release=True)
     BUILDS = []
 
     click.echo('--- Copying libs and header into unity example')
@@ -97,7 +90,8 @@ def unity(ctx):
         LIBRARY_NAME = 'discord-rpc.bundle'
         BUILD_BASE_PATH = os.path.join(SCRIPT_PATH, 'builds', 'osx-dynamic', 'src')
         UNITY_DLL_PATH = UNITY_PROJECT_PATH
-        os.rename(os.path.join(BUILD_BASE_PATH, 'libdiscord-rpc.dylib'), os.path.join(BUILD_BASE_PATH, 'discord-rpc.bundle'))
+        os.rename(
+            os.path.join(BUILD_BASE_PATH, 'libdiscord-rpc.dylib'), os.path.join(BUILD_BASE_PATH, 'discord-rpc.bundle'))
 
         BUILDS.append({BUILD_BASE_PATH: UNITY_DLL_PATH})
 
@@ -122,14 +116,7 @@ def unity(ctx):
 @click.pass_context
 def unreal(ctx):
     """ build libs and copy them into the unreal project """
-    ctx.invoke(
-        libs,
-        clean=False,
-        static=False,
-        shared=True,
-        skip_formatter=True,
-        just_release=True
-    )
+    ctx.invoke(libs, clean=False, static=False, shared=True, skip_formatter=True, just_release=True)
     BUILDS = []
 
     click.echo('--- Copying libs and header into unreal example')
@@ -178,11 +165,7 @@ def build_lib(build_name, generator, options, just_release):
     mkdir_p(build_path)
     mkdir_p(install_path)
     with cd(build_path):
-        initial_cmake = [
-            'cmake',
-            SCRIPT_PATH,
-            '-DCMAKE_INSTALL_PREFIX=%s' % os.path.join('..', 'install', build_name)
-        ]
+        initial_cmake = ['cmake', SCRIPT_PATH, '-DCMAKE_INSTALL_PREFIX=%s' % os.path.join('..', 'install', build_name)]
         if generator:
             initial_cmake.extend(['-G', generator])
         for key in options:
@@ -224,22 +207,28 @@ def sign():
         sign_command_base = [
             tool,
             'sign',
-            '/n', 'Discord Inc.',
+            '/n',
+            'Discord Inc.',
             '/a',
-            '/tr', 'http://timestamp.digicert.com/rfc3161',
+            '/tr',
+            'http://timestamp.digicert.com/rfc3161',
             '/as',
-            '/td', 'sha256',
-            '/fd', 'sha256',
+            '/td',
+            'sha256',
+            '/fd',
+            'sha256',
         ]
     elif PLATFORM == 'osx':
         signable_extensions.add('.dylib')
         sign_command_base = [
             tool,
-            '--keychain', os.path.expanduser('~/Library/Keychains/login.keychain'),
+            '--keychain',
+            os.path.expanduser('~/Library/Keychains/login.keychain'),
             '-vvvv',
             '--deep',
             '--force',
-            '--sign', 'Developer ID Application: Hammer & Chisel Inc. (53Q6R32WPB)',
+            '--sign',
+            'Developer ID Application: Hammer & Chisel Inc. (53Q6R32WPB)',
         ]
     else:
         click.secho('Not signing things on this platform yet', fg='red')
@@ -286,6 +275,8 @@ def libs(clean, static, shared, skip_formatter, just_release):
 
     if IS_BUILD_MACHINE:
         just_release = True
+        static_options['WARNINGS_AS_ERRORS'] = True
+        dynamic_options['WARNINGS_AS_ERRORS'] = True
 
     if PLATFORM == 'win':
         generator32 = 'Visual Studio 14 2015'

examples/button-clicker/Assets/DiscordController.cs

@@ -14,7 +14,6 @@ public class DiscordController : MonoBehaviour
     public DiscordRpc.RichPresence presence = new DiscordRpc.RichPresence();
     public string applicationId;
     public string optionalSteamId;
-    public int callbackCalls;
     public int clickCounter;
     public DiscordRpc.DiscordUser joinRequest;
     public UnityEngine.Events.UnityEvent onConnect;
@@ -52,41 +51,35 @@ public class DiscordController : MonoBehaviour
 
     public void ReadyCallback(ref DiscordRpc.DiscordUser connectedUser)
     {
-        ++callbackCalls;
         Debug.Log(string.Format("Discord: connected to {0}#{1}: {2}", connectedUser.username, connectedUser.discriminator, connectedUser.userId));
         onConnect.Invoke();
     }
 
     public void DisconnectedCallback(int errorCode, string message)
     {
-        ++callbackCalls;
         Debug.Log(string.Format("Discord: disconnect {0}: {1}", errorCode, message));
         onDisconnect.Invoke();
     }
 
     public void ErrorCallback(int errorCode, string message)
     {
-        ++callbackCalls;
         Debug.Log(string.Format("Discord: error {0}: {1}", errorCode, message));
     }
 
     public void JoinCallback(string secret)
     {
-        ++callbackCalls;
         Debug.Log(string.Format("Discord: join ({0})", secret));
         onJoin.Invoke(secret);
     }
 
     public void SpectateCallback(string secret)
     {
-        ++callbackCalls;
         Debug.Log(string.Format("Discord: spectate ({0})", secret));
         onSpectate.Invoke(secret);
     }
 
     public void RequestCallback(ref DiscordRpc.DiscordUser request)
     {
-        ++callbackCalls;
         Debug.Log(string.Format("Discord: join request {0}#{1}: {2}", request.username, request.discriminator, request.userId));
         joinRequest = request;
         onJoinRequest.Invoke(request);
@@ -104,10 +97,8 @@ public class DiscordController : MonoBehaviour
     void OnEnable()
     {
         Debug.Log("Discord: init");
-        callbackCalls = 0;
-
         handlers = new DiscordRpc.EventHandlers();
-        handlers.readyCallback = ReadyCallback;
+        handlers.readyCallback += ReadyCallback;
         handlers.disconnectedCallback += DisconnectedCallback;
         handlers.errorCallback += ErrorCallback;
         handlers.joinCallback += JoinCallback;

examples/button-clicker/Assets/DiscordRpc.cs

@@ -2,35 +2,44 @@
 using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using System.Text;
+using AOT;
 
 public class DiscordRpc
 {
-    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void ReadyCallback(ref DiscordUser connectedUser);
+    [MonoPInvokeCallback(typeof(OnReadyInfo))]
+    public static void ReadyCallback(ref DiscordUser connectedUser) { Callbacks.readyCallback(ref connectedUser); }
+    public delegate void OnReadyInfo(ref DiscordUser connectedUser);
 
-    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void DisconnectedCallback(int errorCode, string message);
+    [MonoPInvokeCallback(typeof(OnDisconnectedInfo))]
+    public static void DisconnectedCallback(int errorCode, string message) { Callbacks.disconnectedCallback(errorCode, message); }
+    public delegate void OnDisconnectedInfo(int errorCode, string message);
 
-    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void ErrorCallback(int errorCode, string message);
+    [MonoPInvokeCallback(typeof(OnErrorInfo))]
+    public static void ErrorCallback(int errorCode, string message) { Callbacks.errorCallback(errorCode, message); }
+    public delegate void OnErrorInfo(int errorCode, string message);
 
-    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void JoinCallback(string secret);
+    [MonoPInvokeCallback(typeof(OnJoinInfo))]
+    public static void JoinCallback(string secret) { Callbacks.joinCallback(secret); }
+    public delegate void OnJoinInfo(string secret);
 
-    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void SpectateCallback(string secret);
+    [MonoPInvokeCallback(typeof(OnSpectateInfo))]
+    public static void SpectateCallback(string secret) { Callbacks.spectateCallback(secret); }
+    public delegate void OnSpectateInfo(string secret);
 
-    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate void RequestCallback(ref DiscordUser request);
+    [MonoPInvokeCallback(typeof(OnRequestInfo))]
+    public static void RequestCallback(ref DiscordUser request) { Callbacks.requestCallback(ref request); }
+    public delegate void OnRequestInfo(ref DiscordUser request);
+
+    static EventHandlers Callbacks { get; set; }
 
     public struct EventHandlers
     {
-        public ReadyCallback readyCallback;
-        public DisconnectedCallback disconnectedCallback;
-        public ErrorCallback errorCallback;
-        public JoinCallback joinCallback;
-        public SpectateCallback spectateCallback;
-        public RequestCallback requestCallback;
+        public OnReadyInfo readyCallback;
+        public OnDisconnectedInfo disconnectedCallback;
+        public OnErrorInfo errorCallback;
+        public OnJoinInfo joinCallback;
+        public OnSpectateInfo spectateCallback;
+        public OnRequestInfo requestCallback;
     }
 
     [Serializable, StructLayout(LayoutKind.Sequential)]
@@ -69,8 +78,23 @@ public class DiscordRpc
         Ignore = 2
     }
 
+    public static void Initialize(string applicationId, ref EventHandlers handlers, bool autoRegister, string optionalSteamId, int pipe = 0)
+    {
+        Callbacks = handlers;
+
+        EventHandlers staticEventHandlers = new EventHandlers();
+        staticEventHandlers.readyCallback += DiscordRpc.ReadyCallback;
+        staticEventHandlers.disconnectedCallback += DiscordRpc.DisconnectedCallback;
+        staticEventHandlers.errorCallback += DiscordRpc.ErrorCallback;
+        staticEventHandlers.joinCallback += DiscordRpc.JoinCallback;
+        staticEventHandlers.spectateCallback += DiscordRpc.SpectateCallback;
+        staticEventHandlers.requestCallback += DiscordRpc.RequestCallback;
+
+        InitializeInternal(applicationId, ref staticEventHandlers, autoRegister, optionalSteamId, pipe);
+    }
+
     [DllImport("discord-rpc", EntryPoint = "Discord_Initialize", CallingConvention = CallingConvention.Cdecl)]
-    public static extern void Initialize(string applicationId, ref EventHandlers handlers, bool autoRegister, string optionalSteamId);
+    static extern void InitializeInternal(string applicationId, ref EventHandlers handlers, bool autoRegister, string optionalSteamId, int pipe);
 
     [DllImport("discord-rpc", EntryPoint = "Discord_Shutdown", CallingConvention = CallingConvention.Cdecl)]
     public static extern void Shutdown();
@@ -129,20 +153,20 @@ public class DiscordRpc
                 FreeMem();
             }
 
-            _presence.state = StrToPtr(state, 128);
-            _presence.details = StrToPtr(details, 128);
+            _presence.state = StrToPtr(state);
+            _presence.details = StrToPtr(details);
             _presence.startTimestamp = startTimestamp;
             _presence.endTimestamp = endTimestamp;
-            _presence.largeImageKey = StrToPtr(largeImageKey, 32);
-            _presence.largeImageText = StrToPtr(largeImageText, 128);
-            _presence.smallImageKey = StrToPtr(smallImageKey, 32);
-            _presence.smallImageText = StrToPtr(smallImageText, 128);
-            _presence.partyId = StrToPtr(partyId, 128);
+            _presence.largeImageKey = StrToPtr(largeImageKey);
+            _presence.largeImageText = StrToPtr(largeImageText);
+            _presence.smallImageKey = StrToPtr(smallImageKey);
+            _presence.smallImageText = StrToPtr(smallImageText);
+            _presence.partyId = StrToPtr(partyId);
             _presence.partySize = partySize;
             _presence.partyMax = partyMax;
-            _presence.matchSecret = StrToPtr(matchSecret, 128);
-            _presence.joinSecret = StrToPtr(joinSecret, 128);
-            _presence.spectateSecret = StrToPtr(spectateSecret, 128);
+            _presence.matchSecret = StrToPtr(matchSecret);
+            _presence.joinSecret = StrToPtr(joinSecret);
+            _presence.spectateSecret = StrToPtr(spectateSecret);
             _presence.instance = instance;
 
             return _presence;
@@ -152,16 +176,18 @@ public class DiscordRpc
         /// Returns a pointer to a representation of the given string with a size of maxbytes
         /// </summary>
         /// <param name="input">String to convert</param>
-        /// <param name="maxbytes">Max number of bytes to use</param>
         /// <returns>Pointer to the UTF-8 representation of <see cref="input"/></returns>
-        private IntPtr StrToPtr(string input, int maxbytes)
+        private IntPtr StrToPtr(string input)
         {
             if (string.IsNullOrEmpty(input)) return IntPtr.Zero;
-            var convstr = StrClampBytes(input, maxbytes);
-            var convbytecnt = Encoding.UTF8.GetByteCount(convstr);
-            var buffer = Marshal.AllocHGlobal(convbytecnt);
+            var convbytecnt = Encoding.UTF8.GetByteCount(input);
+            var buffer = Marshal.AllocHGlobal(convbytecnt + 1);
+            for (int i = 0; i < convbytecnt + 1; i++)
+            {
+                Marshal.WriteByte(buffer, i, 0);
+            }
             _buffers.Add(buffer);
-            Marshal.Copy(Encoding.UTF8.GetBytes(convstr), 0, buffer, convbytecnt);
+            Marshal.Copy(Encoding.UTF8.GetBytes(input), 0, buffer, convbytecnt);
             return buffer;
         }
 
@@ -181,30 +207,6 @@ public class DiscordRpc
             return Encoding.UTF8.GetString(Encoding.UTF8.GetBytes(str));
         }
 
-        /// <summary>
-        /// Clamp the string to the given byte length preserving null termination
-        /// </summary>
-        /// <param name="toclamp">string to clamp</param>
-        /// <param name="maxbytes">max bytes the resulting string should have (including null termination)</param>
-        /// <returns>null terminated string with a byte length less or equal to <see cref="maxbytes"/></returns>
-        private static string StrClampBytes(string toclamp, int maxbytes)
-        {
-            var str = StrToUtf8NullTerm(toclamp);
-            var strbytes = Encoding.UTF8.GetBytes(str);
-
-            if (strbytes.Length <= maxbytes)
-            {
-                return str;
-            }
-
-            var newstrbytes = new byte[] { };
-            Array.Copy(strbytes, 0, newstrbytes, 0, maxbytes - 1);
-            newstrbytes[newstrbytes.Length - 1] = 0;
-            newstrbytes[newstrbytes.Length - 2] = 0;
-
-            return Encoding.UTF8.GetString(newstrbytes);
-        }
-
         /// <summary>
         /// Free the allocated memory for conversion to <see cref="RichPresenceStruct"/>
         /// </summary>

examples/send-presence/send-presence.c

@@ -129,7 +129,7 @@ static void discordInit()
     handlers.joinGame = handleDiscordJoin;
     handlers.spectateGame = handleDiscordSpectate;
     handlers.joinRequest = handleDiscordJoinRequest;
-    Discord_Initialize(APPLICATION_ID, &handlers, 1, NULL);
+    Discord_Initialize(APPLICATION_ID, &handlers, 1, NULL, 0);
 }
 
 static void gameLoop()

examples/unrealstatus/Plugins/discordrpc/Source/DiscordRpc/Private/DiscordRpc.cpp

@@ -12,19 +12,26 @@ void FDiscordRpcModule::StartupModule()
 #if defined(DISCORD_DYNAMIC_LIB)
     // Get the base directory of this plugin
     FString BaseDir = IPluginManager::Get().FindPlugin("DiscordRpc")->GetBaseDir();
-    const FString SDKDir = FPaths::Combine(*BaseDir, TEXT("Source"), TEXT("ThirdParty"), TEXT("DiscordRpcLibrary"));
+    const FString SDKDir =
+      FPaths::Combine(*BaseDir, TEXT("Source"), TEXT("ThirdParty"), TEXT("DiscordRpcLibrary"));
 #if PLATFORM_WINDOWS
     const FString LibName = TEXT("discord-rpc");
     const FString LibDir = FPaths::Combine(*SDKDir, TEXT("Win64"));
     if (!LoadDependency(LibDir, LibName, DiscordRpcLibraryHandle)) {
-        FMessageDialog::Open(EAppMsgType::Ok, LOCTEXT(LOCTEXT_NAMESPACE, "Failed to load DiscordRpc plugin. Plug-in will not be functional."));
+        FMessageDialog::Open(
+          EAppMsgType::Ok,
+          LOCTEXT(LOCTEXT_NAMESPACE,
+                  "Failed to load DiscordRpc plugin. Plug-in will not be functional."));
         FreeDependency(DiscordRpcLibraryHandle);
     }
 #elif PLATFORM_MAC
     const FString LibName = TEXT("libdiscord-rpc");
     const FString LibDir = FPaths::Combine(*SDKDir, TEXT("Mac"));
     if (!LoadDependency(LibDir, LibName, DiscordRpcLibraryHandle)) {
-        FMessageDialog::Open(EAppMsgType::Ok, LOCTEXT(LOCTEXT_NAMESPACE, "Failed to load DiscordRpc plugin. Plug-in will not be functional."));
+        FMessageDialog::Open(
+          EAppMsgType::Ok,
+          LOCTEXT(LOCTEXT_NAMESPACE,
+                  "Failed to load DiscordRpc plugin. Plug-in will not be functional."));
         FreeDependency(DiscordRpcLibraryHandle);
     }
 #endif
@@ -49,8 +56,7 @@ bool FDiscordRpcModule::LoadDependency(const FString& Dir, const FString& Name,
 
     Handle = FPlatformProcess::GetDllHandle(*Path);
 
-    if (Handle == nullptr)
-    {
+    if (Handle == nullptr) {
         return false;
     }
 
@@ -59,8 +65,7 @@ bool FDiscordRpcModule::LoadDependency(const FString& Dir, const FString& Name,
 
 void FDiscordRpcModule::FreeDependency(void*& Handle)
 {
-    if (Handle != nullptr)
-    {
+    if (Handle != nullptr) {
         FPlatformProcess::FreeDllHandle(Handle);
         Handle = nullptr;
     }

examples/unrealstatus/Plugins/discordrpc/Source/DiscordRpc/Private/DiscordRpcBlueprint.cpp

@@ -82,7 +82,8 @@ static void JoinRequestHandler(const DiscordUser* request)
 
 void UDiscordRpc::Initialize(const FString& applicationId,
                              bool autoRegister,
-                             const FString& optionalSteamId)
+                             const FString& optionalSteamId,
+                             int pipe)
 {
     self = this;
     IsConnected = false;
@@ -102,7 +103,7 @@ void UDiscordRpc::Initialize(const FString& applicationId,
     auto appId = StringCast<ANSICHAR>(*applicationId);
     auto steamId = StringCast<ANSICHAR>(*optionalSteamId);
     Discord_Initialize(
-      (const char*)appId.Get(), &handlers, autoRegister, (const char*)steamId.Get());
+      (const char*)appId.Get(), &handlers, autoRegister, (const char*)steamId.Get(), pipe);
 }
 
 void UDiscordRpc::Shutdown()

examples/unrealstatus/Plugins/discordrpc/Source/DiscordRpc/Public/DiscordRpcBlueprint.h

@@ -24,6 +24,16 @@ struct FDiscordUserData {
     FString avatar;
 };
 
+/**
+* Valid response codes for Respond function
+*/
+UENUM(BlueprintType)
+enum class EDiscordJoinResponseCodes : uint8
+{
+	DISCORD_REPLY_NO		UMETA(DisplayName="No"),
+	DISCORD_REPLY_YES		UMETA(DisplayName="Yes"),
+	DISCORD_REPLY_IGNORE	UMETA(DisplayName="Ignore")
+};
 
 DECLARE_LOG_CATEGORY_EXTERN(Discord, Log, All);
 
@@ -89,7 +99,8 @@ public:
               Category = "Discord")
     void Initialize(const FString& applicationId,
                     bool autoRegister,
-                    const FString& optionalSteamId);
+                    const FString& optionalSteamId,
+                    int optionalPipeNumber);
 
     UFUNCTION(BlueprintCallable,
               meta = (DisplayName = "Shut down connection", Keywords = "Discord rpc"),

include/discord_rpc.h

@@ -64,7 +64,8 @@ typedef struct DiscordEventHandlers {
 DISCORD_EXPORT void Discord_Initialize(const char* applicationId,
                                        DiscordEventHandlers* handlers,
                                        int autoRegister,
-                                       const char* optionalSteamId);
+                                       const char* optionalSteamId,
+                                       int optionalPipeNumber);
 DISCORD_EXPORT void Discord_Shutdown(void);
 
 /* checks for incoming messages, dispatches callbacks */

src/CMakeLists.txt

@@ -2,6 +2,7 @@ include_directories(${PROJECT_SOURCE_DIR}/include)
 
 option(ENABLE_IO_THREAD "Start up a separate I/O thread, otherwise I'd need to call an update function" ON)
 option(USE_STATIC_CRT "Use /MT[d] for dynamic library" OFF)
+option(WARNINGS_AS_ERRORS "When enabled, compiles with `-Werror` (on *nix platforms)." OFF)
 
 set(CMAKE_CXX_STANDARD 14)
 
@@ -71,12 +72,23 @@ if(UNIX)
 
     add_library(discord-rpc ${BASE_RPC_SRC})
     target_link_libraries(discord-rpc PUBLIC pthread)
+
+    if (APPLE)
+        target_link_libraries(discord-rpc PRIVATE "-framework AppKit, -mmacosx-version-min=10.10")
+    endif (APPLE)
+
     target_compile_options(discord-rpc PRIVATE
         -g
         -Wall
         -Wextra
         -Wpedantic
-        -Werror
+    )
+
+    if (${WARNINGS_AS_ERRORS})
+      target_compile_options(discord-rpc PRIVATE -Werror)
+    endif (${WARNINGS_AS_ERRORS})
+
+    target_compile_options(discord-rpc PRIVATE
         -Wno-unknown-pragmas # pragma push thing doesn't work on clang
         -Wno-old-style-cast # it's fine
         -Wno-c++98-compat # that was almost 2 decades ago

src/connection.h

@@ -12,7 +12,7 @@ struct BaseConnection {
     static BaseConnection* Create();
     static void Destroy(BaseConnection*&);
     bool isOpen{false};
-    bool Open();
+    bool Open(int pipe);
     bool Close();
     bool Write(const void* data, size_t length);
     bool Read(void* data, size_t length);

src/connection_unix.cpp

@@ -49,7 +49,7 @@ static const char* GetTempPath()
     c = nullptr;
 }
 
-bool BaseConnection::Open()
+bool BaseConnection::Open(int pipe)
 {
     const char* tempPath = GetTempPath();
     auto self = reinterpret_cast<BaseConnectionUnix*>(this);
@@ -62,8 +62,7 @@ bool BaseConnection::Open()
     int optval = 1;
     setsockopt(self->sock, SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval));
 #endif
-
-    for (int pipeNum = 0; pipeNum < 10; ++pipeNum) {
+    for (int pipeNum = pipe; pipeNum < 10; ++pipeNum) {
         snprintf(
           PipeAddr.sun_path, sizeof(PipeAddr.sun_path), "%s/discord-ipc-%d", tempPath, pipeNum);
         int err = connect(self->sock, (const sockaddr*)&PipeAddr, sizeof(PipeAddr));
@@ -118,5 +117,8 @@ bool BaseConnection::Read(void* data, size_t length)
         }
         Close();
     }
+    else if (res == 0) {
+        Close();
+    }
     return res == (int)length;
 }

src/connection_win.cpp

@@ -6,6 +6,7 @@
 #define NOIME
 #include <assert.h>
 #include <windows.h>
+#include <sstream>
 
 int GetProcessId()
 {
@@ -30,11 +31,11 @@ static BaseConnectionWin Connection;
     c = nullptr;
 }
 
-bool BaseConnection::Open()
+bool BaseConnection::Open(int pipe)
 {
     wchar_t pipeName[]{L"\\\\?\\pipe\\discord-ipc-0"};
     const size_t pipeDigit = sizeof(pipeName) / sizeof(wchar_t) - 2;
-    pipeName[pipeDigit] = L'0';
+    pipeName[pipeDigit] += pipe;
     auto self = reinterpret_cast<BaseConnectionWin*>(this);
     for (;;) {
         self->pipe = ::CreateFileW(

src/discord_register_linux.cpp

@@ -33,9 +33,11 @@ extern "C" DISCORD_EXPORT void Discord_Register(const char* applicationId, const
 
     char exePath[1024];
     if (!command || !command[0]) {
-        if (readlink("/proc/self/exe", exePath, sizeof(exePath)) <= 0) {
+        ssize_t size = readlink("/proc/self/exe", exePath, sizeof(exePath));
+        if (size <= 0 || size >= (ssize_t)sizeof(exePath)) {
             return;
         }
+        exePath[size] = '\0';
         command = exePath;
     }
 
@@ -91,7 +93,8 @@ extern "C" DISCORD_EXPORT void Discord_Register(const char* applicationId, const
     }
 }
 
-extern "C" DISCORD_EXPORT void Discord_RegisterSteamGame(const char* applicationId, const char* steamId)
+extern "C" DISCORD_EXPORT void Discord_RegisterSteamGame(const char* applicationId,
+                                                         const char* steamId)
 {
     char command[256];
     sprintf(command, "xdg-open steam://rungameid/%s", steamId);

src/discord_register_win.cpp

@@ -26,7 +26,8 @@ static HRESULT StringCbPrintfW(LPWSTR pszDest, size_t cbDest, LPCWSTR pszFormat,
     HRESULT ret;
     va_list va;
     va_start(va, pszFormat);
-    cbDest /= 2; // Size is divided by 2 to convert from bytes to wide characters - causes segfault othervise
+    cbDest /= 2; // Size is divided by 2 to convert from bytes to wide characters - causes segfault
+                 // othervise
     ret = vsnwprintf(pszDest, cbDest, pszFormat, va);
     pszDest[cbDest - 1] = 0; // Terminate the string in case a buffer overflow; -1 will be returned
     va_end(va);
@@ -44,17 +45,24 @@ static HRESULT StringCbPrintfW(LPWSTR pszDest, size_t cbDest, LPCWSTR pszFormat,
 #undefine RegSetKeyValueW
 #endif
 #define RegSetKeyValueW regset
-static LSTATUS regset(HKEY hkey, LPCWSTR subkey, LPCWSTR name, DWORD type, const void *data, DWORD len)
+static LSTATUS regset(HKEY hkey,
+                      LPCWSTR subkey,
+                      LPCWSTR name,
+                      DWORD type,
+                      const void* data,
+                      DWORD len)
 {
     HKEY htkey = hkey, hsubkey = nullptr;
     LSTATUS ret;
-    if (subkey && subkey[0])
-    {
-        if((ret = RegCreateKeyExW(hkey, subkey, 0, 0, 0, KEY_ALL_ACCESS, 0, &hsubkey, 0)) != ERROR_SUCCESS) return ret;
+    if (subkey && subkey[0]) {
+        if ((ret = RegCreateKeyExW(hkey, subkey, 0, 0, 0, KEY_ALL_ACCESS, 0, &hsubkey, 0)) !=
+            ERROR_SUCCESS)
+            return ret;
         htkey = hsubkey;
     }
     ret = RegSetValueExW(htkey, name, 0, type, (const BYTE*)data, len);
-    if (hsubkey && hsubkey != hkey) RegCloseKey(hsubkey);
+    if (hsubkey && hsubkey != hkey)
+        RegCloseKey(hsubkey);
     return ret;
 }
 
@@ -138,7 +146,8 @@ extern "C" DISCORD_EXPORT void Discord_Register(const char* applicationId, const
     Discord_RegisterW(appId, wcommand);
 }
 
-extern "C" DISCORD_EXPORT void Discord_RegisterSteamGame(const char* applicationId, const char* steamId)
+extern "C" DISCORD_EXPORT void Discord_RegisterSteamGame(const char* applicationId,
+                                                         const char* steamId)
 {
     wchar_t appId[32];
     MultiByteToWideChar(CP_UTF8, 0, applicationId, -1, appId, 32);

src/discord_rpc.cpp

@@ -54,6 +54,7 @@ static std::atomic_bool WasJustDisconnected{false};
 static std::atomic_bool GotErrorMessage{false};
 static std::atomic_bool WasJoinGame{false};
 static std::atomic_bool WasSpectateGame{false};
+static std::atomic_bool UpdatePresence{false};
 static char JoinGameSecret[256];
 static char SpectateGameSecret[256];
 static int LastErrorCode{0};
@@ -89,10 +90,11 @@ public:
         keepRunning.store(true);
         ioThread = std::thread([&]() {
             const std::chrono::duration<int64_t, std::milli> maxWait{500LL};
-            while (keepRunning.load()) {
             Discord_UpdateConnection();
+            while (keepRunning.load()) {
                 std::unique_lock<std::mutex> lock(waitForIOMutex);
                 waitForIOActivity.wait_for(lock, maxWait);
+                Discord_UpdateConnection();
             }
         });
     }
@@ -118,7 +120,7 @@ public:
     void Notify() {}
 };
 #endif // DISCORD_DISABLE_IO_THREAD
-static IoThreadHolder IoThread;
+static IoThreadHolder* IoThread{nullptr};
 
 static void UpdateReconnectTime()
 {
@@ -213,17 +215,17 @@ static void Discord_UpdateConnection(void)
         }
 
         // writes
-        if (QueuedPresence.length) {
+        if (UpdatePresence.exchange(false) && QueuedPresence.length) {
             QueuedMessage local;
             {
                 std::lock_guard<std::mutex> guard(PresenceMutex);
                 local.Copy(QueuedPresence);
-                QueuedPresence.length = 0;
             }
             if (!Connection->Write(local.buffer, local.length)) {
                 // if we fail to send, requeue
                 std::lock_guard<std::mutex> guard(PresenceMutex);
                 QueuedPresence.Copy(local);
+                UpdatePresence.exchange(true);
             }
         }
 
@@ -237,7 +239,9 @@ static void Discord_UpdateConnection(void)
 
 static void SignalIOActivity()
 {
-    IoThread.Notify();
+    if (IoThread != nullptr) {
+        IoThread->Notify();
+    }
 }
 
 static bool RegisterForEvent(const char* evtName)
@@ -269,8 +273,14 @@ static bool DeregisterForEvent(const char* evtName)
 extern "C" DISCORD_EXPORT void Discord_Initialize(const char* applicationId,
                                                   DiscordEventHandlers* handlers,
                                                   int autoRegister,
-                                                  const char* optionalSteamId)
+                                                  const char* optionalSteamId,
+                                                  int pipe)
 {
+    IoThread = new (std::nothrow) IoThreadHolder();
+    if (IoThread == nullptr) {
+        return;
+    }
+
     if (autoRegister) {
         if (optionalSteamId && optionalSteamId[0]) {
             Discord_RegisterSteamGame(applicationId, optionalSteamId);
@@ -299,9 +309,13 @@ extern "C" DISCORD_EXPORT void Discord_Initialize(const char* applicationId,
         return;
     }
 
-    Connection = RpcConnection::Create(applicationId);
+    Connection = RpcConnection::Create(applicationId, pipe);
     Connection->onConnect = [](JsonDocument& readyMessage) {
         Discord_UpdateHandlers(&QueuedHandlers);
+        if (QueuedPresence.length > 0) {
+            UpdatePresence.exchange(true);
+            SignalIOActivity();
+        }
         auto data = GetObjMember(&readyMessage, "data");
         auto user = GetObjMember(data, "user");
         auto userId = GetStrMember(user, "id");
@@ -327,15 +341,11 @@ extern "C" DISCORD_EXPORT void Discord_Initialize(const char* applicationId,
     Connection->onDisconnect = [](int err, const char* message) {
         LastDisconnectErrorCode = err;
         StringCopy(LastDisconnectErrorMessage, message);
-        {
-            std::lock_guard<std::mutex> guard(HandlerMutex);
-            Handlers = {};
-        }
         WasJustDisconnected.exchange(true);
         UpdateReconnectTime();
     };
 
-    IoThread.Start();
+    IoThread->Start();
 }
 
 extern "C" DISCORD_EXPORT void Discord_Shutdown(void)
@@ -346,7 +356,14 @@ extern "C" DISCORD_EXPORT void Discord_Shutdown(void)
     Connection->onConnect = nullptr;
     Connection->onDisconnect = nullptr;
     Handlers = {};
-    IoThread.Stop();
+    QueuedPresence.length = 0;
+    UpdatePresence.exchange(false);
+    if (IoThread != nullptr) {
+        IoThread->Stop();
+        delete IoThread;
+        IoThread = nullptr;
+    }
+
     RpcConnection::Destroy(Connection);
 }
 
@@ -356,6 +373,7 @@ extern "C" DISCORD_EXPORT void Discord_UpdatePresence(const DiscordRichPresence*
         std::lock_guard<std::mutex> guard(PresenceMutex);
         QueuedPresence.length = JsonWriteRichPresenceObj(
           QueuedPresence.buffer, sizeof(QueuedPresence.buffer), Nonce++, Pid, presence);
+        UpdatePresence.exchange(true);
     }
     SignalIOActivity();
 }

src/rpc_connection.cpp

@@ -6,10 +6,11 @@
 static const int RpcVersion = 1;
 static RpcConnection Instance;
 
-/*static*/ RpcConnection* RpcConnection::Create(const char* applicationId)
+/*static*/ RpcConnection* RpcConnection::Create(const char* applicationId, int pipe)
 {
     Instance.connection = BaseConnection::Create();
     StringCopy(Instance.appId, applicationId);
+    Instance.pipe = pipe;
     return &Instance;
 }
 
@@ -26,13 +27,9 @@ void RpcConnection::Open()
         return;
     }
 
-    if (state == State::Disconnected) {
-        if (connection->Open()) {
-        }
-        else {
+    if (state == State::Disconnected && !connection->Open(Instance.pipe)) {
         return;
     }
-    }
 
     if (state == State::SentHandshake) {
         JsonDocument message;

src/rpc_connection.h

@@ -43,11 +43,12 @@ struct RpcConnection {
     void (*onConnect)(JsonDocument& message){nullptr};
     void (*onDisconnect)(int errorCode, const char* message){nullptr};
     char appId[64]{};
+    int pipe;
     int lastErrorCode{0};
     char lastErrorMessage[256]{};
     RpcConnection::MessageFrame sendFrame;
 
-    static RpcConnection* Create(const char* applicationId);
+    static RpcConnection* Create(const char* applicationId, int pipe);
     static void Destroy(RpcConnection*&);
 
     inline bool IsOpen() const { return state == State::Connected; }

src/serialization.cpp

@@ -102,8 +102,7 @@ size_t JsonWriteRichPresenceObj(char* dest,
             WriteKey(writer, "pid");
             writer.Int(pid);
 
-            if (presence != nullptr)
-            {
+            if (presence != nullptr) {
                 WriteObject activity(writer, "activity");
 
                 WriteOptionalString(writer, "state", presence->state);