1 files changed, 63 insertions, 0 deletions
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..f24fa3d
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,63 @@
+use std::error::Error as StdError;
+use std::fmt;
+use std::num::TryFromIntError;
+
+#[derive(Debug)]
+pub enum Error {
+    Io(std::io::Error),
+    ParseRange(ParseRangeError),
+    TryFromInt(TryFromIntError),
+    Config(String),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Io(io) => write!(f, "{}", io),
+            Self::ParseRange(pr) => write!(f, "{}", pr),
+            Self::TryFromInt(tfi) => write!(f, "{}", tfi),
+            Self::Config(c) => write!(f, "{}", c),
+        }
+    }
+}
+
+impl StdError for Error {}
+
+impl From<std::io::Error> for Error {
+    fn from(e: std::io::Error) -> Self {
+        Self::Io(e)
+    }
+}
+
+impl From<ParseRangeError> for Error {
+    fn from(e: ParseRangeError) -> Self {
+        Self::ParseRange(e)
+    }
+}
+
+impl From<TryFromIntError> for Error {
+    fn from(e: TryFromIntError) -> Self {
+        Self::TryFromInt(e)
+    }
+}
+
+#[derive(Debug)]
+pub struct ParseRangeError {
+    source_str: String,
+}
+
+impl ParseRangeError {
+    pub fn new(source_str: &str) -> Self {
+        ParseRangeError {
+            source_str: String::from(source_str),
+        }
+    }
+}
+
+impl fmt::Display for ParseRangeError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{}", self.source_str)
+    }
+}
+
+impl StdError for ParseRangeError {}