1 files changed, 41 insertions, 0 deletions
diff --git a/src/reader.rs b/src/reader.rs
new file mode 100644
index 0000000..4d122f9
--- /dev/null
+++ b/src/reader.rs
@@ -0,0 +1,41 @@
+use snafu::ResultExt as _;
+
+pub struct Reader<R> {
+    reader: R,
+    parser: crate::parser::Parser,
+    read_buf: [u8; 4096],
+    done_reading: bool,
+}
+
+impl<R: tokio::io::AsyncRead> Reader<R> {
+    pub fn new(reader: R) -> Self {
+        Self {
+            reader,
+            parser: crate::parser::Parser::new(),
+            read_buf: [0; 4096],
+            done_reading: false,
+        }
+    }
+
+    pub fn poll_read(
+        &mut self,
+    ) -> futures::Poll<Option<crate::frame::Frame>, crate::error::Error> {
+        loop {
+            if let Some(frame) = self.parser.next_frame() {
+                return Ok(futures::Async::Ready(Some(frame)));
+            } else if self.done_reading {
+                return Ok(futures::Async::Ready(None));
+            }
+
+            let n = futures::try_ready!(self
+                .reader
+                .poll_read(&mut self.read_buf)
+                .context(crate::error::ReadFile));
+            if n > 0 {
+                self.parser.add_bytes(&self.read_buf[..n]);
+            } else {
+                self.done_reading = true;
+            }
+        }
+    }
+}