74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
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package winbt
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import (
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"syscall"
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"unsafe"
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"github.com/go-ole/go-ole"
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)
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type IVector struct {
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ole.IInspectable
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}
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type IVectorVtbl struct {
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ole.IInspectableVtbl
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// These methods have been obtained from windows.foundation.collections.h
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// in the WinRT API.
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// read methods
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GetAt uintptr // (_In_opt_ unsigned index, _Out_ T_abi *item)
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GetSize uintptr // (_Out_ unsigned *size)
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GetView uintptr // (_Outptr_result_maybenull_ IVectorView<T_logical> **view)
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IndexOf uintptr // (_In_opt_ T_abi value, _Out_ unsigned *index, _Out_ boolean *found)
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// write methods
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SetAt uintptr // (_In_ unsigned index, _In_opt_ T_abi item)
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InsertAt uintptr // (_In_ unsigned index, _In_opt_ T_abi item)
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RemoveAt uintptr // (_In_ unsigned index)
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Append uintptr // (_In_opt_ T_abi item)
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RemoveAtEnd uintptr // ()
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Clear uintptr // ()
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// bulk transfer methods
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GetMany uintptr // (_In_ unsigned startIndex, _In_ unsigned capacity, _Out_writes_to_(capacity,*actual) T_abi *value, _Out_ unsigned *actual)
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ReplaceAll uintptr // (_In_ unsigned count, _In_reads_(count) T_abi *value)
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}
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func (v *IVector) VTable() *IVectorVtbl {
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return (*IVectorVtbl)(unsafe.Pointer(v.RawVTable))
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}
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func (v *IVector) At(index int) (element unsafe.Pointer) {
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// The caller will need to cast the element to the correct type (for
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// example, *IBluetoothLEAdvertisementDataSection).
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hr, _, _ := syscall.Syscall(
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v.VTable().GetAt,
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3,
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uintptr(unsafe.Pointer(v)),
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uintptr(index),
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uintptr(unsafe.Pointer(&element)),
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)
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mustSucceed(hr)
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return
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}
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func (v *IVector) Size() int {
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// Note that because the size is defined as `unsigned`, and `unsigned`
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// means 32-bit in Windows (even 64-bit windows), the size is always a
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// uint32.
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// Casting to int because that is the common data type for sizes in Go. It
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// should practically always fit on 32-bit Windows and definitely always
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// fit on 64-bit Windows (with a 64-bit Go int).
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var size uint32
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hr, _, _ := syscall.Syscall(
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v.VTable().GetSize,
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2,
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uintptr(unsafe.Pointer(v)),
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uintptr(unsafe.Pointer(&size)),
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0)
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mustSucceed(hr)
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return int(size)
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}
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