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Elias Naur
2328ddfeca
All functions left in the old package unsafe were provided byte slice views of other types. Rename the package accordingly and avoid a name clash with the standard library package unsafe. Signed-off-by: Elias Naur <mail@eliasnaur.com>
36 lines
811 B
Go
36 lines
811 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).Elem()
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sz := int(v.Type().Size())
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var res []byte
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h := (*reflect.SliceHeader)(unsafe.Pointer(&res))
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h.Data = uintptr(unsafe.Pointer(v.UnsafeAddr()))
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h.Cap = sz
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h.Len = sz
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return res
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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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var res []byte
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h := (*reflect.SliceHeader)(unsafe.Pointer(&res))
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h.Data = first.UnsafeAddr()
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h.Cap = v.Cap() * sz
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h.Len = v.Len() * sz
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return res
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}
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