ldmc/morphisms/morphism-base/length_prefix.morphism-base

morph_array_as_valterm_to_lenpfx (Terminator:x86.UInt8)
    <Seq~<ValueTerminated Terminator> x86.UInt8>
--> <Seq~<LengthPrefix x86.UInt64> x86.UInt8>
```
    length_prefix_uint8_array_clear(dst);
    while( *src != Terminator ) {
        length_prefix_uint8_array_push(dst, *src);
        src++;
    }

    return 0;
```

morph_array_as_lenpfx_to_valterm (Terminator:x86.UInt8)
    <Seq~<LengthPrefix x86.UInt64> x86.UInt8>
--> <Seq~<ValueTerminated Terminator> x86.UInt8>
```
    for( uint64_t i = 0; i < src->len; ++i ) {
        *dst ++ = src->items[i];
    }
    *dst = Terminator;

    return 0;
```