From 6001cdeff335e12583a398acbb5a8a42c01bc077 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Thu, 8 Dec 2022 09:13:17 +0100
Subject: fast mode

---
 evc/src/format/ser.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'evc/src/format')

diff --git a/evc/src/format/ser.rs b/evc/src/format/ser.rs
index 817cafe..995ca75 100644
--- a/evc/src/format/ser.rs
+++ b/evc/src/format/ser.rs
@@ -103,6 +103,28 @@ impl<T: Ser> Ser for Vec<T> {
     }
 }
 
+pub trait ConstSizeSerExt: Sized {
+    fn write_const_size(&self, sink: &mut impl Write, size: usize) -> anyhow::Result<()>;
+    fn read_const_size(source: &mut impl Read, size: usize) -> anyhow::Result<Self>;
+}
+impl<T: Ser> ConstSizeSerExt for Vec<T> {
+    fn write_const_size(&self, sink: &mut impl Write, size: usize) -> anyhow::Result<()> {
+        assert_eq!(self.len(), size);
+        for e in self {
+            e.write(sink).context("some const-size vec")?;
+        }
+        Ok(())
+    }
+
+    fn read_const_size(source: &mut impl Read, size: usize) -> anyhow::Result<Self> {
+        let mut v = vec![];
+        for _ in 0..size {
+            v.push(T::read(source)?)
+        }
+        Ok(v)
+    }
+}
+
 impl Ser for u8 {
     fn write(&self, sink: &mut impl Write) -> anyhow::Result<()> {
         Ok(sink.write_all(&[*self]).context("write u8")?)
-- 
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