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use buffered_reader::{
BufferedReader, BufferedReaderGeneric, BufferedReaderMemory,
};
use std::fs::File;
use std::io;
use std::path::Path;
use CTB;
use Result;
use armor;
/// Transparently strips ASCII Armor.
///
/// This reader detects and strips ASCII Armor.
pub struct Reader<'a>(Box<'a + BufferedReader<()>>);
impl<'a> Reader<'a> {
fn from_buffered_reader(mut br: Box<'a + BufferedReader<()>>)
-> Result<Self> {
let ptag = br.data_hard(1)?[0];
if let Ok(_) = CTB::from_ptag(ptag) {
Ok(Reader(br))
} else {
Ok(Reader(Box::new(BufferedReaderGeneric::new(
armor::Reader::from_buffered_reader(br, armor::Kind::Any),
None))))
}
}
/// Creates a `Reader` from an `io::Read`er.
pub fn from_reader<R>(reader: R) -> Result<Self>
where R: io::Read + 'a
{
Self::from_buffered_reader(
Box::new(BufferedReaderGeneric::new(reader, None)))
}
/// Creates a `Reader` from a file.
pub fn from_file<P>(path: P) -> Result<Self>
where P: AsRef<Path>
{
Self::from_buffered_reader(
Box::new(BufferedReaderGeneric::new(File::open(path)?, None)))
}
/// Creates a `Reader` from a buffer.
pub fn from_bytes(bytes: &'a [u8]) -> Result<Self> {
Self::from_buffered_reader(
Box::new(BufferedReaderMemory::new(bytes)))
}
}
impl<'a> io::Read for Reader<'a> {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
self.0.read(buf)
}
}
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