argdata 0.1.2

Argdata: A binary serialization format.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

use byteorder::{BigEndian, ByteOrder};
use fd;
use std::io;
use Argdata;
use ReadError;
use Value;

#[derive(Clone, Copy, PartialEq, PartialOrd, Debug)]
pub struct Float {
	value: f64,
}

/// Create an argdata value representing a 64-bit floating point value.
pub fn float<T: Into<f64>>(value: T) -> Float {
	Float {
		value: value.into(),
	}
}

impl Float {
	pub fn value(&self) -> f64 {
		self.value
	}
}

impl<'d> Argdata<'d> for Float {
	fn read<'a>(&'a self) -> Result<Value<'a, 'd>, ReadError>
	where
		'd: 'a,
	{
		Ok(Value::Float(self.value))
	}

	fn serialized_length(&self) -> usize {
		9
	}

	fn serialize(&self, writer: &mut io::Write, _: Option<&mut fd::FdMapping>) -> io::Result<()> {
		let mut buf = [0; 9];
		buf[0] = 5;
		BigEndian::write_f64(&mut buf[1..], self.value);
		writer.write_all(&buf)
	}
}