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use crate::{hint, util, Error, Parcel, Settings};
use std::ffi::CString;
use std::io::prelude::{Read, Write};
impl Parcel for CString {
const TYPE_NAME: &'static str = "CString";
fn read_field(
read: &mut dyn Read,
settings: &Settings,
_hints: &mut hint::Hints,
) -> Result<Self, Error> {
let mut result = Vec::new();
loop {
let c: u8 = Parcel::read(read, settings)?;
if c == 0x00 {
return Ok(CString::new(result)?);
}
result.push(c);
}
}
fn write_field(
&self,
write: &mut dyn Write,
settings: &Settings,
_hints: &mut hint::Hints,
) -> Result<(), Error> {
util::write_items(self.clone().into_bytes_with_nul().iter(), write, settings)
}
}
#[cfg(test)]
mod test {
use crate::{Parcel, Settings};
use std::ffi::CString;
use std::io::Cursor;
#[test]
fn can_read_cstring() {
let mut data = Cursor::new([0x41, 0x42, 0x43, 0]);
let read_back: CString = Parcel::read(&mut data, &Settings::default()).unwrap();
assert_eq!(read_back, CString::new("ABC").unwrap());
}
#[test]
fn can_write_cstring() {
let mut buffer = Cursor::new(Vec::new());
CString::new("ABC")
.unwrap()
.write(&mut buffer, &Settings::default())
.unwrap();
assert_eq!(buffer.into_inner(), vec![0x41, 0x42, 0x43, 0]);
}
}