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restic/internal/restorer/restorer_windows_test.go
2022-09-24 21:39:39 +02:00

36 lines
719 B
Go

//go:build windows
// +build windows
package restorer
import (
"math"
"syscall"
"testing"
"unsafe"
rtest "github.com/restic/restic/internal/test"
"golang.org/x/sys/windows"
)
func getBlockCount(t *testing.T, filename string) int64 {
libkernel32 := windows.NewLazySystemDLL("kernel32.dll")
err := libkernel32.Load()
rtest.OK(t, err)
proc := libkernel32.NewProc("GetCompressedFileSizeW")
err = proc.Find()
rtest.OK(t, err)
namePtr, err := syscall.UTF16PtrFromString(filename)
rtest.OK(t, err)
result, _, _ := proc.Call(uintptr(unsafe.Pointer(namePtr)), 0)
const invalidFileSize = uintptr(4294967295)
if result == invalidFileSize {
return -1
}
return int64(math.Ceil(float64(result) / 512))
}