firmware/src/mesh-pb-constants.cpp

#include <Arduino.h>
#include "mesh-pb-constants.h"
#include <pb_encode.h>
#include <pb_decode.h>
#include <assert.h>

/// helper function for encoding a record as a protobuf, any failures to encode are fatal and we will panic
/// returns the encoded packet size
size_t pb_encode_to_bytes(uint8_t *destbuf, size_t destbufsize, const pb_msgdesc_t *fields, const void *src_struct)
{

    pb_ostream_t stream = pb_ostream_from_buffer(destbuf, destbufsize);
    if (!pb_encode(&stream, fields, &src_struct))
    {
        Serial.printf("Error: can't encode protobuf %s\n", PB_GET_ERROR(&stream));
        assert(0); // FIXME - panic
    }
    else
    {
        return stream.bytes_written;
    }
}


/// helper function for decoding a record as a protobuf, we will return false if the decoding failed
bool pb_decode_from_bytes(const uint8_t *srcbuf, size_t srcbufsize, const pb_msgdesc_t *fields, void *dest_struct)
{
    pb_istream_t stream = pb_istream_from_buffer(srcbuf, srcbufsize);
    if (!pb_decode(&stream, fields, &dest_struct))
    {
        Serial.printf("Error: can't decode protobuf %s\n", PB_GET_ERROR(&stream));
        return false;
    }
    else
    {
        return true;
    }
}