mirror of https://github.com/docker/cli.git
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
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package deepcopy
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import (
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"fmt"
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"time"
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"github.com/gogo/protobuf/types"
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)
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// CopierFrom can be implemented if an object knows how to copy another into itself.
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type CopierFrom interface {
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// Copy takes the fields from src and copies them into the target object.
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//
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// Calling this method with a nil receiver or a nil src may panic.
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CopyFrom(src interface{})
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}
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// Copy copies src into dst. dst and src must have the same type.
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//
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// If the type has a copy function defined, it will be used.
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//
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// Default implementations for builtin types and well known protobuf types may
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// be provided.
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//
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// If the copy cannot be performed, this function will panic. Make sure to test
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// types that use this function.
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func Copy(dst, src interface{}) {
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switch dst := dst.(type) {
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case *types.Any:
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src := src.(*types.Any)
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dst.TypeUrl = src.TypeUrl
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if src.Value != nil {
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dst.Value = make([]byte, len(src.Value))
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copy(dst.Value, src.Value)
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} else {
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dst.Value = nil
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}
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case *types.Duration:
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src := src.(*types.Duration)
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*dst = *src
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case *time.Duration:
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src := src.(*time.Duration)
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*dst = *src
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case *types.Timestamp:
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src := src.(*types.Timestamp)
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*dst = *src
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case CopierFrom:
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dst.CopyFrom(src)
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default:
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panic(fmt.Sprintf("Copy for %T not implemented", dst))
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}
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}
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