Function nanocbor_fmt_tstr

pub unsafe extern "C" fn nanocbor_fmt_tstr(
    enc: *mut nanocbor_encoder_t,
    len: size_t,
) -> c_int

@brief Write a text string indicator for a string with specific length into the encoder buffer

This doesn’t write any text string into the encoder buffer, only the type and length indicator for the text string

@param[in] enc Encoder context @param[in] len Length of the text string

@return number of bytes written @return Negative on error