Cargo.toml

@@ -1,29 +1,20 @@
 [package]
 name = "rematch"
-version = "0.2.0"
+version = "0.1.0"
 authors = ["Avril <flanchan@cumallover.me>"]
-edition = "2024"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [profile.release]
 opt-level = 3
-lto = true
+lto = "fat"
 codegen-units = 1
 panic = "unwind"
-strip = true
-
-[profile.symbols]
-inherits = "release"
-strip = false
 
 [features]
-default= ["perl", "unstable"]
+perl = ["pcre"]
-
-perl = ["dep:pcre2"]
-unstable = ["regex/unstable"]
 
 [dependencies]
-pcre2 = { version = "0.2.9", optional = true }
+regex = "1"
-regex = { version = "1.11.1", features = ["use_std"] }
+pcre = { version = "0.2.3", optional = true }
-color-eyre = { version = "0.6.3", default-features = false, features = ["track-caller"] }

src/main.rs

@@ -3,42 +3,8 @@
 mod re;
 mod text;
 
-use color_eyre::{
+fn main() -> Result<(), Box<dyn std::error::Error>>
-    eyre::{
-        self,
-        eyre,
-        WrapErr as _,
-    },
-    SectionExt as _, Help as _,
-};
-
-fn initialise() -> eyre::Result<()>
-{
-    color_eyre::install()?;
-    Ok(())
-}
-
-fn print_group<S: ?Sized, G, T>(to: &mut S, g: G, group: usize) -> std::io::Result<()>
-where S: std::io::Write,
-      G: IntoIterator<Item = Option<T>>,
-      T: std::borrow::Borrow<str>
 {
-    match g.into_iter().nth(group) {
-	Some(None) => writeln!(to, ""),
-	Some(Some(g)) => writeln!(to, "{}", g.borrow()),
-	None => Ok(()),
-    }
-}
-
-fn main() -> eyre::Result<()>
-{
-    initialise().wrap_err("Fatal: Failed to install panic handle")?;
-    
-    // let cli = args::parse_cli();//.wrap_err("Error parsing command-line arguments")?;
-    //
-    // eprintln!("{:#?}", cli);
-    // return Ok(());
-
     let args: Vec<String> = std::env::args().collect();
 
     if args.len() < 4 {
@@ -50,14 +16,10 @@ fn main() -> eyre::Result<()>
 	let text = &args[1];
 	let group: usize = args[3].parse().expect("Invalid group number.");
 
-	use std::io::Write;
-	let mut stdout = std::io::stdout();
-	
 	if text == "-" {
-	    text::stdin_lines(|text| -> eyre::Result<bool> {
+	    text::stdin_lines(|text| -> Result<bool, re::Error> {
-		let mut stdout = stdout.lock();
 		match re.exec(&text)? {
-		    Some(g) if g.len() > group => print_group(&mut stdout, g, group)?, //println!("{}", &g[group]),
+		    Some(g) if g.len() > group => println!("{}", &g[group]),
 		    _ => (),
 		}
 		Ok(true)
@@ -65,11 +27,10 @@ fn main() -> eyre::Result<()>
 	} else {
 
 	    match re.exec(&text)? {
-		Some(g) if g.len() > group => print_group(&mut stdout, g, group)?,//println!("{}", &g.nth(group).unwrap().map(|x| x.as_ref()).unwrap_or("")),
+		Some(g) if g.len() > group => println!("{}", &g[group]),
 		_ => (),
 	    }
 	}
-	stdout.flush().unwrap();
     }
     Ok(())
 }

src/re.rs

@@ -1,23 +1,23 @@
+#![allow(unused_imports)]
+
 use std::{
     error,
-    fmt,
+    fmt::{
-    borrow::Cow,
+	self,
+	Write,
+    },
+    sync::{
+	Arc,
+	Mutex,
+    }
 };
 
-pub type FrozenVec<T> = Box<[T]>;
+pub type Groups = Vec<String>;
-pub type FrozenString = Box<str>;
-
-// NOTE: Currently unused, as we use `to_utf8_lossy()` for PCRE2 `byte`-matching (XXX: Should we change?)
-// TODO: to return some kind of `Either<&'s str, impl bytes::Buf + 's>` type, which would use `str` on non-PCRE, but opaque `bytes::Buf` on PCRE?)
-pub type FrozenBytes = FrozenVec<u8>; 
-
-pub type Groups<String = FrozenString> = FrozenVec<Option<String>>;
 
-#[derive(Debug, Clone)]
 pub struct Regex
 {
     #[cfg(feature="perl")]
-    internal: pcre2::bytes::Regex,
+    internal: Arc<Mutex<pcre::Pcre>>,
     #[cfg(not(feature = "perl"))]
     internal: regex::Regex,
 }
@@ -50,18 +50,24 @@ impl Regex {
     pub fn compile(string: impl AsRef<str>) -> Result<Self, Error> 
     {
 	#[cfg(feature = "perl")]
-	return Ok(Self{internal: pcre2::bytes::RegexBuilder::new().build(string.as_ref())?});
+	return Ok(Self{internal: Arc::new(Mutex::new(pcre::Pcre::compile(string.as_ref())?))});
 	#[cfg(not(feature = "perl"))]
 	return Ok(Self{internal: regex::Regex::new(string.as_ref())?});
     }
 
-    pub fn exec<'s>(&self, string: &'s str) -> Result<Option<Groups<Cow<'s, str>>>, Error>
+    pub fn exec(&self, string: impl AsRef<str>) -> Result<Option<Groups>, Error>
     {
 	#[cfg(feature = "perl")]
 	return {
-	    Ok(match self.internal.captures(string.as_ref())? {
+	    let mut re = self.internal.lock().unwrap();
+	    Ok(match re.exec(string.as_ref()) {
 		Some(m) => {
-		    Some((0..m.len()).map(move |i| m.get(i).map(|x| String::from_utf8_lossy(x.as_bytes()) )).collect())
+		    let len = m.string_count();
+		    let mut output = Vec::with_capacity(len);
+		    for i in 0..len {
+			output.push(m.group(i).to_owned());
+		    }
+		    Some(output)
 		},
 		None => None,
 	    })
@@ -70,7 +76,14 @@ impl Regex {
 	return {
 	    Ok(match self.internal.captures(string.as_ref()) {
 		Some(m) => {
-		    Some((0..m.len()).map(move |i| m.get(i).map(|x| Cow::Borrowed(x.as_str()) )).collect())
+		    let mut output = Vec::with_capacity(m.len());
+		    for i in 0..m.len() {
+			let ma = m.get(i).unwrap();
+			let mut op = String::with_capacity(ma.range().len());
+			write!(op, "{}", ma.as_str())?;
+			output.push(op);
+		    }
+		    Some(output)
 		},
 		None => None,
 	    })
@@ -86,7 +99,7 @@ impl From<fmt::Error> for Error
     }
 }
 
-//#[cfg(not(feature = "perl"))]
+#[cfg(not(feature = "perl"))]
 impl From<regex::Error> for Error
 {
     fn from(er: regex::Error) -> Self
@@ -96,9 +109,9 @@ impl From<regex::Error> for Error
 }
 
 #[cfg(feature = "perl")]
-impl From<pcre2::Error> for Error
+impl From<pcre::CompilationError> for Error
 {
-    fn from(er: pcre2::Error) -> Self
+    fn from(er: pcre::CompilationError) -> Self
     {
 	Self::Compile(format!("{}", er))
     }