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use std::fs;
use std::io::{BufWriter, Write};
use std::path::Path;
use byteorder::{LittleEndian, WriteBytesExt};
use point::Point;
use result::Result;
#[derive(Debug)]
pub struct Writer<W: Write> {
writer: W,
}
impl Writer<BufWriter<fs::File>> {
pub fn from_path<P: AsRef<Path>>(path: P) -> Result<Writer<BufWriter<fs::File>>> {
let writer = BufWriter::new(try!(fs::File::create(path)));
Writer::new(writer)
}
}
impl<W: Write> Writer<W> {
pub fn new(mut writer: W) -> Result<Writer<W>> {
try!(writer.write_u32::<LittleEndian>(8));
try!(writer.write_u16::<LittleEndian>(5));
try!(writer.write_u16::<LittleEndian>(0));
Ok(Writer { writer: writer })
}
pub fn write_point(&mut self, point: &Point) -> Result<()> {
try!(self.writer.write_f64::<LittleEndian>(point.time));
try!(self.writer.write_f32::<LittleEndian>(point.range));
try!(self.writer.write_f32::<LittleEndian>(point.theta));
try!(self.writer.write_f32::<LittleEndian>(point.x));
try!(self.writer.write_f32::<LittleEndian>(point.y));
try!(self.writer.write_f32::<LittleEndian>(point.z));
try!(self.writer.write_u16::<LittleEndian>(point.amplitude));
try!(self.writer.write_u16::<LittleEndian>(point.width));
try!(self.writer.write_u8(point.target_type.as_u8()));
try!(self.writer.write_u8(point.target));
try!(self.writer.write_u8(point.num_target));
try!(self.writer.write_u16::<LittleEndian>(point.rg_index));
try!(self.writer.write_u8(point.channel_desc_byte()));
Ok(())
}
}