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use super::{write_marker, RmpWrite};
use crate::encode::ValueWriteError;
use crate::Marker;
/// Encodes and attempts to write the most efficient string length implementation to the given
/// write, returning the marker used.
///
/// # Errors
///
/// This function will return `ValueWriteError` on any I/O error occurred while writing either the
/// marker or the data.
pub fn write_str_len<W: RmpWrite>(wr: &mut W, len: u32) -> Result<Marker, ValueWriteError<W::Error>> {
let marker = if len < 32 {
Marker::FixStr(len as u8)
} else if len < 256 {
Marker::Str8
} else if len <= u16::MAX as u32 {
Marker::Str16
} else {
Marker::Str32
};
write_marker(wr, marker)?;
if marker == Marker::Str8 {
wr.write_data_u8(len as u8)?;
}
if marker == Marker::Str16 {
wr.write_data_u16(len as u16)?;
}
if marker == Marker::Str32 {
wr.write_data_u32(len)?;
}
Ok(marker)
}
/// Encodes and attempts to write the most efficient string binary representation to the
/// given `Write`.
///
/// # Errors
///
/// This function will return `ValueWriteError` on any I/O error occurred while writing either the
/// marker or the data.
// TODO: Docs, range check, example, visibility.
pub fn write_str<W: RmpWrite>(wr: &mut W, data: &str) -> Result<(), ValueWriteError<W::Error>> {
write_str_len(wr, data.len() as u32)?;
wr.write_bytes(data.as_bytes()).map_err(ValueWriteError::InvalidDataWrite)
}