Function unpackMapWithAllocator

gapis/api/vulkan/command_buffer_rebuilder.go:30–46

unpackMapWithAllocator takes a dense map of u32 -> structure, flattens the map into a slice, allocates the appropriate data using a custom provided allocation function and returns it as well as the length of the map.

(alloc func(v ...interface{}) api.AllocResult, m interface{})

// map into a slice, allocates the appropriate data using a custom provided
// allocation function and returns it as well as the length of the map.
func unpackMapWithAllocator(alloc func(v ...interface{}) api.AllocResult, m interface{}) (api.AllocResult, uint32) {
	u32Type := reflect.TypeOf(uint32(0))
	d := dictionary.From(m)
	if d == nil || d.KeyTy() != u32Type {
		msg := fmt.Sprintf("Expecting a map of u32 -> structures: got %T", m)
		panic(msg)
	}

	sl := reflect.MakeSlice(reflect.SliceOf(d.ValTy()), d.Len(), d.Len())
	for _, e := range dictionary.Entries(d) {
		i := e.K.(uint32)
		v := reflect.ValueOf(e.V)
		sl.Index(int(i)).Set(v)
	}

	return alloc(sl.Interface()), uint32(d.Len())
}

// unpackMap takes a dense map of u32 -> structure, flattens the map into
// a slice, allocates the appropriate data and returns it as well as the