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Wrong code generated for dynamic array of bools #135

mprymek opened this issue Sep 3, 2019 · 2 comments


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commented Sep 3, 2019

When I compile this DSDL file:

# DigitalInputsValues

uint8 start_input_id

bool[<=32] values

I got illegal decode code generated:

uint32_t automation_DigitalInputsValues_encode_internal(automation_DigitalInputsValues* source,
  void* msg_buf,
  uint32_t offset,
  uint8_t CANARD_MAYBE_UNUSED(root_item))
    uint32_t c = 0;

    canardEncodeScalar(msg_buf, offset, 8, (void*)&source->start_input_id); // 255
    offset += 8;

    // Dynamic Array (values)
    //  - Add array length, last item, but bitlen < 8.
    canardEncodeScalar(msg_buf, offset, 6, (void*)&source->values.len);
    offset += 6;

    // - Add array items
    for (c = 0; c < source->values.len; c++)
                           (void*)(source-> + c));// 1
        offset += 1;

    return offset;

Note the strange 6 in Dynamic Array (values). Static array works ok.

I'm sorry, I'm not familiar enough with the compiler code to make a PR.


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commented Sep 6, 2019

Sorry, the compiler is currently broken. We have added the following warning to the README to make sure people are aware of it:

WARNING: this code generation tool is not production-ready; do not use it unless you are feeling adventurous and willing to contribute. In a production setting consider writing the serialization code manually instead.

We should be working on a new compiler in the UAVCAN-v1.0 branch. If you need code generation, please use libuavcan instead.


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commented Sep 6, 2019

Ok, thanks.

@mprymek mprymek closed this Sep 6, 2019

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