build(ariadne): vendor clap

third_party/crates/anstyle-parse-1.0.0/src/state/mod.rs

@@ -0,0 +1,43 @@
+//! ANSI escape code parsing state machine
+
+#[cfg(test)]
+mod codegen;
+mod definitions;
+mod table;
+
+#[cfg(test)]
+pub(crate) use definitions::pack;
+pub(crate) use definitions::unpack;
+pub use definitions::Action;
+pub use definitions::State;
+
+/// Transition to next [`State`]
+///
+/// Note: This does not directly support UTF-8.
+/// - If the data is validated as UTF-8 (e.g. `str`) or single-byte C1 control codes are
+///   unsupported, then treat [`Action::BeginUtf8`] and [`Action::Execute`] for UTF-8 continuations
+///   as [`Action::Print`].
+/// - If the data is not validated, then a UTF-8 state machine will need to be implemented on top,
+///   starting with [`Action::BeginUtf8`].
+///
+/// Note: When [`State::Anywhere`] is returned, revert back to the prior state.
+#[inline]
+pub const fn state_change(state: State, byte: u8) -> (State, Action) {
+    // Handle state changes in the anywhere state before evaluating changes
+    // for current state.
+    let mut change = state_change_(State::Anywhere, byte);
+    if change == 0 {
+        change = state_change_(state, byte);
+    }
+
+    // Unpack into a state and action
+    unpack(change)
+}
+
+#[inline]
+const fn state_change_(state: State, byte: u8) -> u8 {
+    let state_idx = state as usize;
+    let byte_idx = byte as usize;
+
+    table::STATE_CHANGES[state_idx][byte_idx]
+}