Fixed windows compatibility

disk_win.go

@@ -0,0 +1,36 @@
+//go:build windows
+// +build windows
+
+package main
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func getTotalDiskSpace(path string) uint64 {
+	kernel32 := syscall.NewLazyDLL("kernel32.dll")
+	getDiskFreeSpaceExW := kernel32.NewProc("GetDiskFreeSpaceExW")
+
+	lpDirectoryName, err := syscall.UTF16PtrFromString(path)
+	if err != nil {
+		printErr("Failed to encode path for Windows API: %v", err)
+		return 0
+	}
+
+	var freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes uint64
+
+	r1, _, err := getDiskFreeSpaceExW.Call(
+		uintptr(unsafe.Pointer(lpDirectoryName)),
+		uintptr(unsafe.Pointer(&freeBytesAvailable)),
+		uintptr(unsafe.Pointer(&totalNumberOfBytes)),
+		uintptr(unsafe.Pointer(&totalNumberOfFreeBytes)),
+	)
+
+	if r1 == 0 {
+		printErr("GetDiskFreeSpaceExW failed: %v", err)
+		return 0
+	}
+
+	return totalNumberOfBytes
+}