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authorTill Höppner2016-02-25 06:48:03 +0100
committerTill Höppner2016-02-25 06:48:03 +0100
commit9f5dd9dad6b13476bab2c6eb3c6528f8ad49311a (patch)
tree1ca71876029cb466aa6230f1aead05b32f19bf6d /cli/src/chain.rs
parent685aac1cc537692b2cf9342dcb6c26fa74c3c920 (diff)
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Refactor... everything.
Diffstat (limited to 'cli/src/chain.rs')
-rw-r--r--cli/src/chain.rs54
1 files changed, 54 insertions, 0 deletions
diff --git a/cli/src/chain.rs b/cli/src/chain.rs
new file mode 100644
index 0000000..a8014b8
--- /dev/null
+++ b/cli/src/chain.rs
@@ -0,0 +1,54 @@
+use std::io::{Read, Result, Write};
+
+pub struct Chain<T> {
+ elem: Vec<T>,
+ index: usize,
+}
+
+impl<T: Read> Read for Chain<T> {
+ fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
+ loop {
+ match self.elem.get_mut(self.index) {
+ Some(ref mut r) => {
+ match try!(r.read(buf)) {
+ 0 => self.index += 1,
+ n => return Ok(n),
+ }
+ }
+ None => return Ok(0),
+ }
+ }
+ }
+}
+
+impl<T: Write> Write for Chain<T> {
+ fn write(&mut self, buf: &[u8]) -> Result<usize> {
+ loop {
+ match self.elem.get_mut(self.index) {
+ Some(ref mut r) => {
+ match try!(r.write(buf)) {
+ 0 => self.index += 1,
+ n => return Ok(n),
+ }
+ }
+ None => return Ok(0),
+ }
+ }
+ }
+
+ fn flush(&mut self) -> Result<()> {
+ match self.elem.get_mut(self.index) {
+ Some(ref mut r) => r.flush(),
+ None => Ok(()),
+ }
+ }
+}
+
+impl<T> Chain<T> {
+ pub fn new(elem: Vec<T>) -> Chain<T> {
+ Chain {
+ index: 0,
+ elem: elem,
+ }
+ }
+}