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a5c29a74d2
Cap'n Proto provides a schema loader, which can be used to dynamically load schemas during runtime. To port this functionality to pycapnp, a new class is provided `C_SchemaLoader`, which exposes the Cap'n Proto C++ interface, and `SchemaLoader`, which is part of the pycapnp library. The specific use case for this is when a capnp message contains a Node.Reader: The schema for a yet unseen message can be loaded dynamically, allowing the future message to be properly processed. If the message is a struct containing other structs, all the schemas for every struct must be loaded to correctly parse the message. See https://github.com/DaneSlattery/capnp_generic_poc for a proof-of-concept. Add docs and cleanup Add more docs Reduce changes Fix flake8 formatting Fix get datatype
14 lines
448 B
C
14 lines
448 B
C
#pragma once
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#include "kj/io.h"
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#include "capnp/dynamic.h"
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#include "capnp/serialize-packed.h"
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kj::Array< ::capnp::byte> messageToPackedBytes(capnp::MessageBuilder & message, size_t wordCount)
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{
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kj::Array<capnp::byte> result = kj::heapArray<capnp::byte>(wordCount * 8);
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kj::ArrayOutputStream out(result.asPtr());
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capnp::writePackedMessage(out, message);
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return heapArray(out.getArray()); // TODO: make this non-copying somehow
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}
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