stuff

1 files changed, 36 insertions, 0 deletions

diff --git a/src/headers.rs b/src/headers.rs
new file mode 100644
index 0000000..d837ee5
--- /dev/null
+++ b/src/headers.rs
@@ -0,0 +1,36 @@
+use std::{fmt::Display, str::FromStr};
+
+macro_rules! header {
+    ($hname:literal, struct $name:ident($type:ty)) => {
+        pub struct $name(pub $type);
+        impl Header for $name {
+            const NAME: &'static str = $hname;
+        }
+        impl Display for $name {
+            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                write!(f, "{}", self.0)
+            }
+        }
+        impl FromStr for $name {
+            type Err = anyhow::Error;
+            fn from_str(s: &str) -> Result<Self, Self::Err> {
+                Ok($name(<$type>::from_str(s)?))
+            }
+        }
+    };
+}
+
+pub trait Header: FromStr<Err = anyhow::Error> + Display {
+    const NAME: &'static str;
+}
+
+header!("Content-Length", struct ContentLength(usize));
+header!("Call-ID", struct CallID(String));
+header!("CSeq", struct CSeq(String));
+header!("Via", struct Via(String));
+header!("Contact", struct Contact(String));
+header!("Max-Forwards", struct MaxForwards(usize));
+header!("From", struct From(String));
+header!("To", struct To(String));
+header!("User-Agent", struct UserAgent(String));
+header!("Allow", struct Allow(String));