forked from joejulian/gio
Elias Naur
37 lines
895 B
Go
37 lines
895 B
Go
// SPDX-License-Identifier: Unlicense OR MIT
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// Package byteslice provides byte slice views of other Go values such as
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// slices and structs.
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package byteslice
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import (
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"reflect"
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"unsafe"
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)
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// Struct returns a byte slice view of a struct.
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func Struct(s interface{}) []byte {
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v := reflect.ValueOf(s)
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sz := int(v.Elem().Type().Size())
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return unsafe.Slice((*byte)(unsafe.Pointer(v.Pointer())), sz)
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}
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// Uint32 returns a byte slice view of a uint32 slice.
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func Uint32(s []uint32) []byte {
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n := len(s)
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if n == 0 {
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return nil
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}
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blen := n * int(unsafe.Sizeof(s[0]))
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return unsafe.Slice((*byte)(unsafe.Pointer(&s[0])), blen)
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}
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// Slice returns a byte slice view of a slice.
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func Slice(s interface{}) []byte {
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v := reflect.ValueOf(s)
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first := v.Index(0)
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sz := int(first.Type().Size())
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res := unsafe.Slice((*byte)(unsafe.Pointer(v.Pointer())), sz*v.Cap())
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return res[:sz*v.Len()]
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}
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