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9b81d4d3ab
Preparation to make decoder use less memory and API more type safe. Now each scalar type has it's own struct type so it can store different things and enables to have a scalar interface. Also own types will enable experimenting with decode DLS designs like using chained methods that are type aware.
29 lines
679 B
Go
29 lines
679 B
Go
package decoders
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import (
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"github.com/wader/fq/pkg/bitio"
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"github.com/wader/fq/pkg/decode"
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"github.com/wader/fq/pkg/scalar"
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)
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type BytesCodec struct{}
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func decodeBytesFn(sms ...scalar.BitBufMapper) (DecodeFn, error) {
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// Bytes are encoded as a long followed by that many bytes of data.
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return func(name string, d *decode.D) any {
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var val []byte
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d.FieldStruct(name, func(d *decode.D) {
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length := d.FieldSintFn("length", VarZigZag)
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br := d.FieldRawLen("data", length*8, sms...)
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val = make([]byte, length)
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if _, err := bitio.ReadFull(br, val, length*8); err != nil {
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d.Fatalf("failed to read %s bytes: %v", name, err)
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}
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})
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return val
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}, nil
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}
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