Gamepad: init support for Windows

src/detection/gamepad/gamepad.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#ifndef FF_INCLUDED_detection_gamepad_gamepad
+#define FF_INCLUDED_detection_gamepad_gamepad
+
+#include "fastfetch.h"
+
+typedef struct FFGamepadDevice
+{
+    FFstrbuf identifier;
+    FFstrbuf name;
+} FFGamepadDevice;
+
+const char* ffDetectGamepad(const FFinstance* instance, FFlist* devices /* List of FFGamepadDevice */);
+
+#endif

src/detection/gamepad/gamepad_nosupport.c

@@ -0,0 +1,6 @@
+#include "gamepad.h"
+
+const char* ffDetectGamepad(FF_MAYBE_UNUSED const FFinstance* instance, FF_MAYBE_UNUSED FFlist* devices /* List of FFGamepadDevice */)
+{
+    return "Not supported on this platform";
+}

src/detection/gamepad/gamepad_windows.cpp

@@ -0,0 +1,32 @@
+extern "C" {
+    #include "gamepad.h"
+}
+
+#include <initguid.h>
+#define DIRECTINPUT_VERSION 0x0800
+#include <dinput.h>
+
+CALLBACK BOOL DIEnumDevicesCallback(LPCDIDEVICEINSTANCEA lpddi, LPVOID pvRef)
+{
+    FFlist* devices = (FFlist*) pvRef;
+
+    FFGamepadDevice* device = (FFGamepadDevice*) ffListAdd(devices);
+    ffStrbufInitF(&device->identifier, "{%08lX-%04hX-%04hX-%02hhX%02hhX-%02hhX%02hhX%02hhX%02hhX%02hhX%02hhX}",
+        lpddi->guidInstance.Data1, lpddi->guidInstance.Data2, lpddi->guidInstance.Data3,
+        lpddi->guidInstance.Data4[0], lpddi->guidInstance.Data4[1], lpddi->guidInstance.Data4[2], lpddi->guidInstance.Data4[3],
+        lpddi->guidInstance.Data4[4], lpddi->guidInstance.Data4[5], lpddi->guidInstance.Data4[6], lpddi->guidInstance.Data4[7]);
+    ffStrbufInitS(&device->name, lpddi->tszInstanceName);
+
+	return DIENUM_CONTINUE;
+}
+
+extern "C"
+const char* ffDetectGamepad(FF_MAYBE_UNUSED const FFinstance* instance, FFlist* devices /* List of FFGamepadDevice */)
+{
+	IDirectInput8A* dinput;
+	if (!SUCCEEDED(DirectInput8Create(GetModuleHandleW(NULL), DIRECTINPUT_VERSION, IID_IDirectInput8A, (void**)&dinput, NULL)))
+        return "DirectInput8Create() failed";
+    dinput->EnumDevices(DI8DEVCLASS_GAMECTRL, DIEnumDevicesCallback, devices, DIEDFL_ALLDEVICES);
+	dinput->Release();
+    return NULL;
+}