--- a/src/priority.rs	Sat Dec 03 14:16:24 2016 +0100
+++ b/src/priority.rs	Sat Dec 03 14:16:44 2016 +0100
@@ -2,8 +2,9 @@
 
 use std::str::FromStr;
 
-#[derive(Debug,  PartialEq)]
+#[derive(Debug,  PartialEq, PartialOrd, Clone, Copy)]
 pub enum Level {
+    NONE = -1,
     EMERG = 0,
     ALERT = 1,
     CRIT = 2,
@@ -32,7 +33,31 @@
     }
 }
 
-#[derive(Debug,  PartialEq)]
+pub fn str_to_level(s: &str) -> Option<Level> {
+    if s == "emerg" {
+        Some(Level::EMERG)
+    } else if s == "alert" {
+        Some(Level::ALERT)
+    } else if s == "crit" || s == "critical" {
+        Some(Level::CRIT)
+    } else if s == "err" {
+        Some(Level::ERR)
+    } else if s == "warn" || s == "warning" {
+        Some(Level::WARNING)
+    } else if s == "notice" {
+        Some(Level::NOTICE)
+    } else if s == "info" {
+        Some(Level::INFO)
+    } else if s == "debug" {
+        Some(Level::DEBUG)
+    } else if s == "none" {
+        Some(Level::NONE)
+    } else {
+        None
+    }
+}
+
+#[derive(Debug,  PartialEq, Clone, Copy)]
 pub enum Facility {
     KERN = 0,
     USER = 1,
@@ -57,6 +82,40 @@
     LOCAL7 = 23,
 }
 
+pub fn str_to_facility(s: &str) -> Option<Facility> {
+    if s == "kern" {
+        Some(Facility::KERN)
+    } else if s == "user" {
+        Some(Facility::USER)
+    } else if s == "mail" {
+        Some(Facility::MAIL)
+    } else if s == "daemon" {
+        Some(Facility::DAEMON)
+    } else if s == "auth" {
+        Some(Facility::AUTH)
+    } else if s == "syslog" {
+        Some(Facility::SYSLOG)
+    } else if s == "lpr" {
+        Some(Facility::LPR)
+    } else if s == "news" {
+        Some(Facility::NEWS)
+    } else if s == "uucp" {
+        Some(Facility::UUCP)
+    } else if s == "cron" {
+        Some(Facility::CRON)
+    } else if s == "authpriv" {
+        Some(Facility::AUTHPRIV)
+    } else if s == "ftp" {
+        Some(Facility::FTP)
+    } else if s.starts_with("local") {
+        let suffix = &s[5..];
+        let num = i32::from_str(suffix).unwrap_or(0);
+        to_facility(Facility::LOCAL0 as i32 + num)
+    } else {
+        None
+    }
+}
+
 pub fn to_facility(l: i32) -> Option<Facility> {
     if (l >= Facility::KERN as i32 && l <= Facility::FTP as i32) ||
        (l >= Facility::LOCAL0 as i32 && l <= Facility::LOCAL7 as i32) {