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#![warn(missing_docs)]
use std::boxed::Box;
use std::io;
use std::result;
use std::fmt;
use self::codec::Codec;
use self::bitio::ByteCount;
use self::bitio::BitReader;
use self::bitio::BitWriter;
pub mod bitio;
pub mod codec;
pub mod model;
pub enum Error {
Eof,
InvalidInput,
IoError(io::Error),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
match *self {
Error::Eof => f.write_str("Unexpected end of file"),
Error::InvalidInput => f.write_str("Invalid data found while processing input"),
Error::IoError(ref e) => f.write_fmt(format_args!("I/O error: {}", e)),
}
}
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
match *self {
Error::Eof => f.write_str("Eof"),
Error::InvalidInput => f.write_str("InvalidInput"),
Error::IoError(ref e) => f.write_fmt(format_args!("IoError({:?})", e)),
}
}
}
#[cfg(test)]
impl PartialEq<Error> for Error {
fn eq(&self, other: &Error) -> bool {
match *self {
Error::Eof => match *other { Error::Eof => true, _ => false },
Error::InvalidInput => match *other { Error::InvalidInput => true, _ => false },
Error::IoError(_) => match *other { Error::IoError(_) => true, _ => false },
}
}
}
pub type Result<T> = result::Result<T, Error>;
pub fn compress(istream: &mut io::Read, ostream: &mut io::Write, model: Box<model::Model>) -> Result<(u64, u64)> {
let mut codec = Codec::new(model);
let mut input = BitReader::new(istream);
let mut output = BitWriter::new(ostream);
try!(codec.compress_stream(&mut input, &mut output));
return Ok((input.get_count(), output.get_count()));
}
pub fn decompress(istream: &mut io::Read, ostream: &mut io::Write, model: Box<model::Model>) -> Result<(u64, u64)> {
let mut codec = Codec::new(model);
let mut input = BitReader::new(istream);
let mut output = BitWriter::new(ostream);
try!(codec.decompress_stream(&mut input, &mut output));
return Ok((input.get_count(), output.get_count()));
}
#[cfg(test)]
mod tests {
use super::Error::*;
use std::io;
macro_rules! assert_ne {
($a:expr, $b:expr) => ($a != $b)
}
#[test]
fn error_eq() {
assert_eq!(Eof, Eof);
assert_eq!(InvalidInput, InvalidInput);
assert_eq!(IoError(io::Error::new(io::ErrorKind::Other, "Other")), IoError(io::Error::new(io::ErrorKind::NotFound, "NotFound")));
assert_ne!(Eof, InvalidInput);
assert_ne!(InvalidInput, IoError(io::Error::new(io::ErrorKind::Other, "Other")));
assert_ne!(IoError(io::Error::new(io::ErrorKind::NotFound, "NotFound")), Eof);
}
}