#include "unaligned_uint64.pb.h" #include <pb_encode.h> int main() { uint8_t buf[128]; pb_ostream_t stream = pb_ostream_from_buffer(buf, sizeof(buf)); MainMessage msg = MainMessage_init_zero; msg.bar[0] = 'A'; pb_encode(&stream, MainMessage_fields, &msg); return 0; }