add okay-ish files

includes/battery.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <stdbool.h>
+
+// Get the current battery level
+int get_battery_level(const char *device_path, bool *is_charging);

includes/helper.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#define PID_WIRED 0x007A
+#define PID_WIRELESS 0x007B
+
+// Enumerate through HID devices and find device path
+void find_device_path(int pid, char *device_path);

src/helper.c

@@ -0,0 +1,60 @@
+#include "../includes/helper.h"
+
+#include <windows.h>
+
+#include <hidsdi.h>
+#include <setupapi.h>
+#include <stdio.h>
+
+#define VID 0x1532
+
+void find_device_path(int pid, char *device_path) {
+  GUID hidGuid;
+  HidD_GetHidGuid(&hidGuid);
+
+  HDEVINFO hDevInfo = SetupDiGetClassDevs(
+      &hidGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
+  if (hDevInfo == INVALID_HANDLE_VALUE) {
+    fprintf_s(stderr, "Failed to get device information.\n");
+    return;
+  }
+
+  SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
+  deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
+
+  for (DWORD i = 0; SetupDiEnumDeviceInterfaces(hDevInfo, NULL, &hidGuid, i,
+                                                &deviceInterfaceData);
+       i++) {
+    DWORD requiredSize;
+    SetupDiGetDeviceInterfaceDetail(hDevInfo, &deviceInterfaceData, NULL, 0,
+                                    &requiredSize, NULL);
+
+    PSP_DEVICE_INTERFACE_DETAIL_DATA detailData =
+        (PSP_DEVICE_INTERFACE_DETAIL_DATA)malloc(requiredSize);
+    detailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
+
+    if (SetupDiGetDeviceInterfaceDetail(hDevInfo, &deviceInterfaceData,
+                                        detailData, requiredSize, NULL, NULL)) {
+      HANDLE hDevice = CreateFile(
+          detailData->DevicePath, GENERIC_READ | GENERIC_WRITE,
+          FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
+      if (hDevice != INVALID_HANDLE_VALUE) {
+        // Get device attributes
+        HIDD_ATTRIBUTES attributes;
+        attributes.Size = sizeof(HIDD_ATTRIBUTES);
+        if (HidD_GetAttributes(hDevice, &attributes)) {
+          // Check VID and PID
+          if (attributes.VendorID == VID && attributes.ProductID == pid) {
+            strcpy(device_path, detailData->DevicePath);
+            CloseHandle(hDevice);
+            break;
+          }
+        }
+        CloseHandle(hDevice);
+      }
+    }
+    free(detailData);
+  }
+
+  SetupDiDestroyDeviceInfoList(hDevInfo);
+}

src/main.c

@@ -0,0 +1,35 @@
+#include "../includes/battery.h"
+#include "../includes/helper.h"
+
+#include <stdio.h>
+#include <string.h>
+
+int main(void) {
+  char device_path[2048];
+
+  // Try wired
+  find_device_path(PID_WIRED, device_path);
+
+  if (strlen(device_path) < 10) {
+    // Try wireless
+    find_device_path(PID_WIRELESS, device_path);
+
+    if (strlen(device_path) < 10) {
+      fprintf_s(stderr, "Can't find any compatible device.\n");
+      return 1;
+    }
+  }
+  printf("Device: %s\n", device_path);
+
+  bool is_charging;
+  int battery_level;
+  if ((battery_level = get_battery_level(device_path, &is_charging)) < 0) {
+    fprintf_s(stderr, "Failed to get battery level.\n");
+    return 1;
+  }
+
+  printf("Battery Level: %d%%\n", battery_level);
+  printf("Charging: %s\n", is_charging ? "Yes" : "No");
+
+  return 0;
+}