//go:build windows

package main

import (
	"path/filepath"

	"golang.org/x/sys/windows"
)

// 返回指定路径所在磁盘的剩余和总容量（字节）
func diskSpace(path string) (free, total uint64, err error) {
	// GetDiskFreeSpaceEx 需要绝对路径
	abs, err := filepath.Abs(path)
	if err != nil {
		return 0, 0, err
	}
	p, err := windows.UTF16PtrFromString(abs)
	if err != nil {
		return 0, 0, err
	}
	var freeToCaller, totalBytes, totalFree uint64
	if err = windows.GetDiskFreeSpaceEx(p, &freeToCaller, &totalBytes, &totalFree); err != nil {
		return 0, 0, err
	}
	return freeToCaller, totalBytes, nil
}