mirror of
https://github.com/wez/wezterm.git
synced 2024-12-26 23:04:49 +03:00
385 lines
12 KiB
Rust
385 lines
12 KiB
Rust
// Builds up the transition table for a state machine based on
|
|
// https://vt100.net/emu/dec_ansi_parser
|
|
use std::collections::HashMap;
|
|
use std::io::prelude::*;
|
|
use std::ops::RangeInclusive;
|
|
|
|
#[path = "src/enums.rs"]
|
|
mod enums;
|
|
use crate::enums::*;
|
|
|
|
type StateMap = HashMap<u8, (Action, State)>;
|
|
|
|
fn r(key: u8) -> RangeInclusive<u8> {
|
|
key..=key
|
|
}
|
|
|
|
fn insert(map: &mut StateMap, keys: RangeInclusive<u8>, value: (Action, State)) {
|
|
for k in keys {
|
|
map.insert(k, value);
|
|
}
|
|
}
|
|
|
|
macro_rules! sparse_table {
|
|
($( $key:expr => ($action:ident, $state:ident) ),* $(,)?) => {
|
|
{
|
|
let mut map = StateMap::new();
|
|
|
|
$(
|
|
insert(&mut map, $key, (Action::$action, State::$state));
|
|
)*
|
|
|
|
map
|
|
}
|
|
}
|
|
}
|
|
|
|
fn apply_anywhere(anywhere: &StateMap, mut map: StateMap) -> StateMap {
|
|
for (k, v) in anywhere {
|
|
map.insert(*k, *v);
|
|
}
|
|
map
|
|
}
|
|
|
|
struct Tables {
|
|
transitions: HashMap<State, StateMap>,
|
|
entry: HashMap<State, Action>,
|
|
exit: HashMap<State, Action>,
|
|
}
|
|
|
|
fn build_tables() -> Tables {
|
|
let mut transitions = HashMap::new();
|
|
let mut entry = HashMap::new();
|
|
let mut exit = HashMap::new();
|
|
|
|
let anywhere = sparse_table! {
|
|
r(0x18) => (Execute, Ground),
|
|
r(0x1a) => (Execute, Ground),
|
|
0x80..=0x8f => (Execute, Ground),
|
|
0x91..=0x97 => (Execute, Ground),
|
|
r(0x99) => (Execute, Ground),
|
|
r(0x9a) => (Execute, Ground),
|
|
r(0x9c) => (None, Ground),
|
|
r(0x1b) => (None, Escape),
|
|
r(0x98) => (None, SosPmApcString),
|
|
r(0x9e) => (None, SosPmApcString),
|
|
r(0x9f) => (None, SosPmApcString),
|
|
r(0x90) => (None, DcsEntry),
|
|
r(0x9d) => (None, OscString),
|
|
r(0x9b) => (None, CsiEntry),
|
|
};
|
|
|
|
transitions.insert(
|
|
State::Ground,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, Ground),
|
|
r(0x19) => (Execute, Ground),
|
|
0x1c..=0x1f => (Execute, Ground),
|
|
0x20..=0x7f => (Print, Ground),
|
|
// The following three ranges allow for
|
|
// UTF-8 multibyte sequences to be recognized
|
|
// and emitted as byte sequences in the ground
|
|
// state.
|
|
0xc2..=0xdf => (Utf8, Utf8Sequence),
|
|
0xe0..=0xef => (Utf8, Utf8Sequence),
|
|
0xf0..=0xf4 => (Utf8, Utf8Sequence),
|
|
},
|
|
),
|
|
);
|
|
|
|
entry.insert(State::Escape, Action::Clear);
|
|
transitions.insert(
|
|
State::Escape,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, Escape),
|
|
r(0x19) => (Execute, Escape),
|
|
0x1c..=0x1f => (Execute, Escape),
|
|
r(0x7f) => (Ignore, Escape),
|
|
0x20..=0x2f => (Collect, EscapeIntermediate),
|
|
0x30..=0x4f => (EscDispatch, Ground),
|
|
0x51..=0x57 => (EscDispatch, Ground),
|
|
r(0x59) => (EscDispatch, Ground),
|
|
r(0x5a) => (EscDispatch, Ground),
|
|
r(0x5c) => (EscDispatch, Ground),
|
|
0x60..=0x7e => (EscDispatch, Ground),
|
|
r(0x5b) => (None, CsiEntry),
|
|
r(0x5d) => (None, OscString),
|
|
r(0x50) => (None, DcsEntry),
|
|
r(0x58) => (None, SosPmApcString),
|
|
r(0x5e) => (None, SosPmApcString),
|
|
r(0x5f) => (None, SosPmApcString),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::EscapeIntermediate,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, EscapeIntermediate),
|
|
r(0x19) => (Execute, EscapeIntermediate),
|
|
0x1c..=0x1f => (Execute, EscapeIntermediate),
|
|
0x20..=0x2f => (Collect, EscapeIntermediate),
|
|
r(0x7f) => (Ignore, EscapeIntermediate),
|
|
0x30..=0x7e => (EscDispatch, Ground),
|
|
},
|
|
),
|
|
);
|
|
|
|
entry.insert(State::CsiEntry, Action::Clear);
|
|
transitions.insert(
|
|
State::CsiEntry,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, CsiEntry),
|
|
r(0x19) => (Execute, CsiEntry),
|
|
0x1c..=0x1f => (Execute, CsiEntry),
|
|
r(0x7f) => (Ignore, CsiEntry),
|
|
0x20..=0x2f => (Collect, CsiIntermediate),
|
|
r(0x3a) => (None, CsiIgnore),
|
|
0x30..=0x39 => (Param, CsiParam),
|
|
r(0x3b) => (Param, CsiParam),
|
|
0x3c..=0x3f => (Collect, CsiParam),
|
|
0x40..=0x7e => (CsiDispatch, Ground),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::CsiIgnore,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, CsiIgnore),
|
|
r(0x19) => (Execute, CsiIgnore),
|
|
0x1c..=0x1f => (Execute, CsiIgnore),
|
|
0x20..=0x3f => (Ignore, CsiIgnore),
|
|
r(0x7f) => (Ignore, CsiIgnore),
|
|
0x40..=0x7e => (None, Ground),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::CsiParam,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, CsiParam),
|
|
r(0x19) => (Execute, CsiParam),
|
|
0x1c..=0x1f => (Execute, CsiParam),
|
|
0x30..=0x39 => (Param, CsiParam),
|
|
r(0x3b) => (Param, CsiParam),
|
|
r(0x7f) => (Ignore, CsiParam),
|
|
r(0x3a) => (None, CsiIgnore),
|
|
0x3c..=0x3f => (None, CsiIgnore),
|
|
0x20..=0x2f => (Collect, CsiIntermediate),
|
|
0x40..=0x7e => (CsiDispatch, Ground),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::CsiIntermediate,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Execute, CsiIntermediate),
|
|
r(0x19) => (Execute, CsiIntermediate),
|
|
0x1c..=0x1f => (Execute, CsiIntermediate),
|
|
0x20..=0x2f => (Collect, CsiIntermediate),
|
|
r(0x7f) => (Ignore, CsiIntermediate),
|
|
0x30..=0x3f => (None, CsiIgnore),
|
|
0x40..=0x7e => (CsiDispatch, Ground),
|
|
},
|
|
),
|
|
);
|
|
|
|
entry.insert(State::DcsEntry, Action::Clear);
|
|
transitions.insert(
|
|
State::DcsEntry,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Ignore, DcsEntry),
|
|
r(0x19) => (Ignore, DcsEntry),
|
|
0x1c..=0x1f => (Ignore, DcsEntry),
|
|
r(0x7f) => (Ignore, DcsEntry),
|
|
r(0x3a) => (None, DcsIgnore),
|
|
0x20..=0x2f => (Collect, DcsIntermediate),
|
|
0x30..=0x39 => (Param, DcsParam),
|
|
r(0x3b) => (Param, DcsParam),
|
|
0x3c..=0x3f => (Collect, DcsParam),
|
|
0x40..=0x7e => (None, DcsPassthrough),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::DcsIntermediate,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Ignore, DcsIntermediate),
|
|
r(0x19) => (Ignore, DcsIntermediate),
|
|
0x1c..=0x1f => (Ignore, DcsIntermediate),
|
|
0x20..=0x2f => (Collect, DcsIntermediate),
|
|
r(0x7f) => (Ignore, DcsIntermediate),
|
|
0x30..=0x3f => (None, DcsIgnore),
|
|
0x40..=0x7e => (None, DcsPassthrough),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::DcsIgnore,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Ignore, DcsIgnore),
|
|
r(0x19) => (Ignore, DcsIgnore),
|
|
0x1c..=0x1f => (Ignore, DcsIgnore),
|
|
0x20..=0x7f => (Ignore, DcsIgnore),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::DcsParam,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Ignore, DcsParam),
|
|
r(0x19) => (Ignore, DcsParam),
|
|
0x1c..=0x1f => (Ignore, DcsParam),
|
|
0x30..=0x39 => (Param, DcsParam),
|
|
r(0x3b) => (Param, DcsParam),
|
|
r(0x7f) => (Ignore, DcsParam),
|
|
r(0x3a) => (None, DcsIgnore),
|
|
0x3c..=0x3f => (None, DcsIgnore),
|
|
0x20..=0x2f => (Collect, DcsIntermediate),
|
|
0x40..=0x7e => (None, DcsPassthrough),
|
|
},
|
|
),
|
|
);
|
|
|
|
entry.insert(State::DcsPassthrough, Action::Hook);
|
|
exit.insert(State::DcsPassthrough, Action::Unhook);
|
|
transitions.insert(
|
|
State::DcsPassthrough,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Put, DcsPassthrough),
|
|
r(0x19) => (Put, DcsPassthrough),
|
|
0x1c..=0x1f => (Put, DcsPassthrough),
|
|
0x20..=0x7e => (Put, DcsPassthrough),
|
|
r(0x7f) => (Ignore, DcsPassthrough),
|
|
},
|
|
),
|
|
);
|
|
|
|
transitions.insert(
|
|
State::SosPmApcString,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x17 => (Ignore, SosPmApcString),
|
|
r(0x19) => (Ignore, SosPmApcString),
|
|
0x1c..=0x1f => (Ignore, SosPmApcString),
|
|
0x20..=0x7f => (Ignore, SosPmApcString),
|
|
},
|
|
),
|
|
);
|
|
|
|
entry.insert(State::OscString, Action::OscStart);
|
|
exit.insert(State::OscString, Action::OscEnd);
|
|
transitions.insert(
|
|
State::OscString,
|
|
apply_anywhere(
|
|
&anywhere,
|
|
sparse_table! {
|
|
0x00..=0x06 => (Ignore, OscString),
|
|
// Using BEL in place of ST is a deviation from
|
|
// https://vt100.net/emu/dec_ansi_parser and was
|
|
// introduced AFAICT by xterm
|
|
r(0x07) => (Ignore, Ground),
|
|
0x08..=0x17 => (Ignore, OscString),
|
|
r(0x19) => (Ignore, OscString),
|
|
0x1c..=0x1f => (Ignore, OscString),
|
|
0x20..=0x7f => (OscPut, OscString),
|
|
// This extended range allows for UTF-8 characters
|
|
// to be embedded in OSC parameters. It is not
|
|
// part of the base state machine.
|
|
0x80..=0xff => (OscPut, OscString),
|
|
},
|
|
),
|
|
);
|
|
|
|
Tables {
|
|
transitions,
|
|
entry,
|
|
exit,
|
|
}
|
|
}
|
|
|
|
fn pack(action: Action, state: State) -> u8 {
|
|
((action as u8) << 4) | (state as u8)
|
|
}
|
|
|
|
fn write_tables(dest_path: std::path::PathBuf, tables: &Tables) -> std::io::Result<()> {
|
|
let mut f = std::fs::File::create(&dest_path)?;
|
|
writeln!(f, "static TRANSITIONS: [[u8; 256]; 14] = [")?;
|
|
for state_num in State::Ground as u8..State::Anywhere as u8 {
|
|
let this_state = State::from_u8(state_num);
|
|
writeln!(f, " // State: {:?}", this_state)?;
|
|
write!(f, " [")?;
|
|
let state_transitions = tables.transitions.get(&this_state).unwrap();
|
|
for byte in 0u8..=0xff {
|
|
let (action, state) = state_transitions
|
|
.get(&byte)
|
|
.cloned()
|
|
.unwrap_or((Action::None, this_state));
|
|
if byte % 12 == 0 {
|
|
write!(f, "\n ")?;
|
|
}
|
|
write!(f, " 0x{:02x},", pack(action, state))?;
|
|
}
|
|
writeln!(f, " ],")?;
|
|
}
|
|
writeln!(f, "];")?;
|
|
|
|
event_table("ENTRY", &mut f, &tables.entry)?;
|
|
event_table("EXIT", &mut f, &tables.exit)?;
|
|
Ok(())
|
|
}
|
|
|
|
fn event_table(
|
|
label: &str,
|
|
f: &mut std::fs::File,
|
|
table: &HashMap<State, Action>,
|
|
) -> std::io::Result<()> {
|
|
writeln!(f, "static {}: [Action; 14] = [", label)?;
|
|
for state_num in State::Ground as u8..State::Anywhere as u8 {
|
|
let this_state = State::from_u8(state_num);
|
|
let action = table.get(&this_state).cloned().unwrap_or(Action::None);
|
|
writeln!(f, " Action::{:?}, // {:?}", action, this_state)?;
|
|
}
|
|
writeln!(f, "];")?;
|
|
Ok(())
|
|
}
|
|
|
|
fn main() {
|
|
let out_dir = std::env::var("OUT_DIR").unwrap();
|
|
let dest_path = std::path::Path::new(&out_dir).join("transitions.rs");
|
|
|
|
let tables = build_tables();
|
|
write_tables(dest_path, &tables).unwrap();
|
|
}
|