/// Writes the specified string into the AIS message. If the string does not fill
/// the entire space within the message, fill characters `@` will be written
/// until the specified number of sixbits is reached.
///
/// @param[out] bits The AIS message.
/// @param[in] ofs The offset at which the string is being written within the message.
/// @param[in] count_sixbits Number of sixbits to write into the message.
/// @param[in] s The string to be written.
///
void binary_data::write_string(
raw & bits, raw::size_type ofs, raw::size_type count_sixbits, const std::string & s)
{
for (raw::size_type i = 0; i < count_sixbits; ++i) {
uint8_t value;
if (i < s.size()) {
value = encode_sixbit_ascii(s[i]);
} else {
value = encode_sixbit_ascii('@');
}
bits.set(value, ofs + i * 6, 6);
}
}
