/*
* void BUF_ADD_BYTES(append, struct buffer_if*, const void*, int32_t size);
* void BUF_ADD_BYTES(prepend, struct buffer_if*, const void*, int32_t size);
/*
* void BUF_ADD_BYTES(append, struct buffer_if*, const void*, int32_t size);
* void BUF_ADD_BYTES(prepend, struct buffer_if*, const void*, int32_t size);