Rust refactoring

* Move Context, Error, and character classes to their own modules.
* Move host/port parsing and IP address validation to their
  own modules, and break the code up into different functions
  to process their state machines.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..e37a02f
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,40 @@
+#![warn(clippy::pedantic)]
+
+use super::context::Context;
+
+#[derive(Debug, Clone, thiserror::Error, PartialEq)]
+pub enum Error {
+    #[error("URI contains non-UTF8 sequences")]
+    CannotExpressAsUtf8(#[from] std::string::FromUtf8Error),
+
+    #[error("scheme expected but missing")]
+    EmptyScheme,
+
+    #[error("illegal character in {0}")]
+    IllegalCharacter(Context),
+
+    #[error("illegal percent encoding")]
+    IllegalPercentEncoding,
+
+    #[error("illegal port number")]
+    IllegalPortNumber(#[source] std::num::ParseIntError),
+
+    #[error("octet group expected")]
+    InvalidDecimalOctet,
+
+    #[error("too few address parts")]
+    TooFewAddressParts,
+
+    #[error("too many address parts")]
+    TooManyAddressParts,
+
+    #[error("too many digits in IPv6 address part")]
+    TooManyDigits,
+
+    #[error("too many double-colons in IPv6 address")]
+    TooManyDoubleColons,
+
+    #[error("truncated host")]
+    TruncatedHost,
+}
+