use crate::color;
use once_cell::sync::Lazy;
use owo_colors::OwoColorize;
use regex::{Regex, RegexSet, Replacer};
use rustc_demangle::Demangle;
use std::borrow::Cow;
#[must_use]
pub fn name(input: &str) -> Option<String> {
Some(format!("{:#?}", demangled(input)?))
}
#[must_use]
pub fn demangled(input: &str) -> Option<Demangle> {
let name = if input.starts_with("__") {
#[allow(clippy::string_slice)]
rustc_demangle::try_demangle(&input[1..]).ok()?
} else {
rustc_demangle::try_demangle(input).ok()?
};
Some(name)
}
const GLOBAL_LABELS_REGEX: &str = r"\b_?(_[a-zA-Z0-9_$\.]+)";
const LOCAL_LABELS_REGEX: &str = r"(?:[^\w\d\$\.]|^)(\.L[a-zA-Z0-9_\$\.]+|\bLBB[0-9_]+)";
const TEMP_LABELS_REGEX: &str = r"\b(Ltmp[0-9]+)\b";
static GLOBAL_LABELS: Lazy<Regex> =
Lazy::new(|| regex::Regex::new(GLOBAL_LABELS_REGEX).expect("regexp should be valid"));
static LOCAL_LABELS: Lazy<Regex> =
Lazy::new(|| regex::Regex::new(LOCAL_LABELS_REGEX).expect("regexp should be valid"));
static LABEL_KINDS: Lazy<RegexSet> = Lazy::new(|| {
regex::RegexSet::new([LOCAL_LABELS_REGEX, GLOBAL_LABELS_REGEX, TEMP_LABELS_REGEX])
.expect("regexp should be valid")
});
static COMMENT_ARGS: Lazy<Regex> =
Lazy::new(|| regex::Regex::new(r"(?:\s|^)(#.+)").expect("regexp should be valid"));
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum LabelKind {
Global,
Local,
Temp,
Unknown,
}
pub fn local_labels(input: &str) -> regex::Matches {
LOCAL_LABELS.find_iter(input)
}
#[must_use]
pub fn label_kind(input: &str) -> LabelKind {
match LABEL_KINDS.matches(input).into_iter().next() {
Some(1) => LabelKind::Global,
Some(0) => LabelKind::Local,
Some(2) => LabelKind::Temp,
_ => LabelKind::Unknown,
}
}
struct LabelColorizer;
impl Replacer for LabelColorizer {
fn replace_append(&mut self, caps: ®ex::Captures<'_>, dst: &mut String) {
use std::fmt::Write;
write!(dst, "{}", color!(&caps[0], OwoColorize::bright_black)).unwrap();
}
}
pub fn color_local_labels(input: &str) -> Cow<'_, str> {
LOCAL_LABELS.replace_all(input, LabelColorizer)
}
struct CommentColorizer;
impl Replacer for CommentColorizer {
fn replace_append(&mut self, caps: ®ex::Captures<'_>, dst: &mut String) {
use std::fmt::Write;
write!(dst, "{}", color!(&caps[0], OwoColorize::blue)).unwrap();
}
}
pub fn color_comment(input: &str) -> Cow<'_, str> {
COMMENT_ARGS.replace_all(input, CommentColorizer)
}
struct Demangler {
full_name: bool,
}
impl Replacer for Demangler {
fn replace_append(&mut self, cap: ®ex::Captures<'_>, dst: &mut std::string::String) {
if let Ok(dem) = rustc_demangle::try_demangle(&cap[1]) {
use std::fmt::Write;
if self.full_name {
write!(dst, "{:?}", color!(dem, OwoColorize::green)).unwrap();
} else {
write!(dst, "{:#?}", color!(dem, OwoColorize::green)).unwrap();
}
} else {
dst.push_str(&cap[0]);
}
}
}
#[must_use]
pub fn contents(input: &str, full_name: bool) -> Cow<'_, str> {
GLOBAL_LABELS.replace_all(input, Demangler { full_name })
}
#[cfg(test)]
mod test {
use owo_colors::set_override;
use super::{contents, name};
const MAC: &str =
"__ZN58_$LT$nom..error..ErrorKind$u20$as$u20$core..fmt..Debug$GT$3fmt17hb98704099c11c31fE";
const LINUX: &str =
"_ZN58_$LT$nom..error..ErrorKind$u20$as$u20$core..fmt..Debug$GT$3fmt17hb98704099c11c31fE";
const CALL_M: &str = "[rip + __ZN58_$LT$nom..error..ErrorKind$u20$as$u20$core..fmt..Debug$GT$3fmt17hb98704099c11c31fE]";
const CALL_L: &str = "[rip + _ZN58_$LT$nom..error..ErrorKind$u20$as$u20$core..fmt..Debug$GT$3fmt17hb98704099c11c31fE]";
#[test]
fn linux_demangle() {
assert!(name(LINUX).is_some());
}
#[test]
fn mac_demangle() {
assert!(name(MAC).is_some());
}
#[test]
fn linux_demangle_call() {
set_override(true);
let x = contents(CALL_L, false);
assert_eq!(
"[rip + \u{1b}[32m<nom::error::ErrorKind as core::fmt::Debug>::fmt\u{1b}[39m]",
x
);
}
#[test]
fn mac_demangle_call() {
set_override(true);
let x = contents(CALL_M, false);
assert_eq!(
"[rip + \u{1b}[32m<nom::error::ErrorKind as core::fmt::Debug>::fmt\u{1b}[39m]",
x
);
}
#[test]
fn mac_demangle_call2() {
set_override(true);
let x = contents(CALL_M, true);
assert_eq!(
"[rip + \u{1b}[32m<nom::error::ErrorKind as core::fmt::Debug>::fmt::hb98704099c11c31f\u{1b}[39m]",
x
);
}
}