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