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mod binary_reader;
pub use self::binary_reader::BinaryReader;
mod xml_reader;
pub use self::xml_reader::XmlReader;
mod xml_writer;
pub use self::xml_writer::XmlWriter;
use std::io::{Read, Seek, SeekFrom};
use {Date, Error};
#[derive(Clone, Debug, PartialEq)]
pub enum Event {
StartArray(Option<u64>),
EndArray,
StartDictionary(Option<u64>),
EndDictionary,
BooleanValue(bool),
DataValue(Vec<u8>),
DateValue(Date),
IntegerValue(i64),
RealValue(f64),
StringValue(String),
}
pub struct Reader<R: Read + Seek>(ReaderInner<R>);
enum ReaderInner<R: Read + Seek> {
Uninitialized(Option<R>),
Xml(XmlReader<R>),
Binary(BinaryReader<R>),
}
impl<R: Read + Seek> Reader<R> {
pub fn new(reader: R) -> Reader<R> {
Reader(ReaderInner::Uninitialized(Some(reader)))
}
fn is_binary(reader: &mut R) -> Result<bool, Error> {
reader.seek(SeekFrom::Start(0))?;
let mut magic = [0; 8];
reader.read_exact(&mut magic)?;
reader.seek(SeekFrom::Start(0))?;
Ok(&magic == b"bplist00")
}
}
impl<R: Read + Seek> Iterator for Reader<R> {
type Item = Result<Event, Error>;
fn next(&mut self) -> Option<Result<Event, Error>> {
let mut reader = match self.0 {
ReaderInner::Xml(ref mut parser) => return parser.next(),
ReaderInner::Binary(ref mut parser) => return parser.next(),
ReaderInner::Uninitialized(ref mut reader) => reader.take().unwrap(),
};
let event_reader = match Reader::is_binary(&mut reader) {
Ok(true) => ReaderInner::Binary(BinaryReader::new(reader)),
Ok(false) => ReaderInner::Xml(XmlReader::new(reader)),
Err(err) => {
::std::mem::replace(&mut self.0, ReaderInner::Uninitialized(Some(reader)));
return Some(Err(err));
}
};
::std::mem::replace(&mut self.0, event_reader);
self.next()
}
}
pub trait Writer {
fn write(&mut self, event: &Event) -> Result<(), Error>;
}