From b1351ae2b47386914602081f52471bcebc787635 Mon Sep 17 00:00:00 2001
From: user0-07161 <user0thenyancat@proton.me>
Date: Sat, 12 Apr 2025 09:15:04 +0200
Subject: [PATCH] feat: add dos2unix and unix2dos

---
 coreutils/src/commands/dos2unix.rs | 76 ++++++++++++++++++++++++++++++
 coreutils/src/commands/mod.rs      |  4 +-
 coreutils/src/commands/unix2dos.rs | 44 +++++++++++++++++
 src/registry.rs                    |  2 +
 4 files changed, 125 insertions(+), 1 deletion(-)
 create mode 100644 coreutils/src/commands/dos2unix.rs
 create mode 100644 coreutils/src/commands/unix2dos.rs

diff --git a/coreutils/src/commands/dos2unix.rs b/coreutils/src/commands/dos2unix.rs
new file mode 100644
index 0000000..2a73912
--- /dev/null
+++ b/coreutils/src/commands/dos2unix.rs
@@ -0,0 +1,76 @@
+use boxutils::args::ArgParser;
+use boxutils::commands::Command;
+use std::fs::File;
+use std::io::{self, BufReader, Read, Write};
+use std::process::exit;
+
+pub fn convert(arguments: &ArgParser, d2u: bool) -> Vec<u8> {
+    let mut vecbuf = Vec::new();
+
+    if arguments.get_normal_args().len() == 0 {
+        let _ = io::stdin().read_to_end(&mut vecbuf);
+    }
+
+    for file in arguments.get_normal_args().iter() {
+        let mut tmpbuf = Vec::new();
+        let mut read = BufReader::new(File::open(file).unwrap());
+        let _ = read.read_to_end(&mut tmpbuf);
+        let _ = vecbuf.append(&mut tmpbuf);
+    }
+
+    if d2u {
+        vecbuf.retain(
+            |x|
+            *x != b'\r'
+        );
+    } else {
+        let mut tmpbuf = Vec::new();
+        vecbuf.iter().enumerate().for_each(|(i, &b)| {
+            if b == b'\n' && i > 0 && vecbuf[i - 1] != b'\r' {
+                tmpbuf.push(b'\r');
+            }
+            tmpbuf.push(b);
+        });
+        vecbuf = tmpbuf;
+    }
+
+    vecbuf
+}
+
+pub struct Dos2Unix;
+
+impl Command for Dos2Unix {
+    fn execute(&self) {
+        let args = ArgParser::builder()
+            .add_flag("-u")
+            .add_flag("-d")
+            .add_flag("--help")
+            .parse_args("dos2unix");
+
+        let mut dos2unix = true;
+
+        if args.get_flag("-u") {
+            dos2unix = true;
+        }
+
+        if args.get_flag("-d") {
+            dos2unix = false;
+        }
+
+        if args.get_flag("--help") {
+            println!("Usage: dos2unix [-d] [-u] [FILE]");
+            print!("\n");
+            println!("-d: unix2dos");
+            println!("-u: dos2unix (default)");
+            exit(0);
+        }
+
+        let result = convert(&args, dos2unix);
+
+        if args.get_normal_args().len() < 1 {
+            let _ = io::stdout().write_all(&result);
+        } else {
+            let _ = std::fs::write(args.get_normal_args()[0].clone(), &result);
+        }
+    }
+}
diff --git a/coreutils/src/commands/mod.rs b/coreutils/src/commands/mod.rs
index b8d13c2..4d16f9e 100644
--- a/coreutils/src/commands/mod.rs
+++ b/coreutils/src/commands/mod.rs
@@ -25,4 +25,6 @@ command!(base32::Base32);
 command!(seq::Seq);
 command!(env::Env);
 command!(ln::Ln);
-command!(dirname::Dirname);
\ No newline at end of file
+command!(dirname::Dirname);
+command!(dos2unix::Dos2Unix);
+command!(unix2dos::Unix2Dos);
diff --git a/coreutils/src/commands/unix2dos.rs b/coreutils/src/commands/unix2dos.rs
new file mode 100644
index 0000000..cccbef6
--- /dev/null
+++ b/coreutils/src/commands/unix2dos.rs
@@ -0,0 +1,44 @@
+use crate::commands::dos2unix::convert;
+use boxutils::args::ArgParser;
+use boxutils::commands::Command;
+use std::io::{self, Write};
+use std::process::exit;
+
+pub struct Unix2Dos;
+
+impl Command for Unix2Dos {
+    fn execute(&self) {
+        let args = ArgParser::builder()
+            .add_flag("-u")
+            .add_flag("-d")
+            .add_flag("--help")
+            .parse_args("unix2dos");
+
+        let mut dos2unix = false;
+
+        if args.get_flag("-u") {
+            dos2unix = true;
+        }
+
+        if args.get_flag("-d") {
+            dos2unix = false;
+        }
+
+        if args.get_flag("--help") {
+            println!("Usage: unix2dos [-d] [-u] [FILE]");
+            println!("\n");
+            println!("-d: unix2dos (default)");
+            println!("-u: dos2unix");
+            exit(0);
+        }
+
+        let result = convert(&args, dos2unix);
+
+        if args.get_normal_args().len() < 1 {
+            let _ = io::stdout().write_all(&result);
+        } else {
+            let _ = std::fs::write(args.get_normal_args()[0].clone(), &result);
+        }
+
+    }
+}
diff --git a/src/registry.rs b/src/registry.rs
index a504308..4a8c550 100644
--- a/src/registry.rs
+++ b/src/registry.rs
@@ -36,6 +36,8 @@ pub fn get_registry() -> CommandRegistry {
         "env" => coreutils::commands::Env,
         "ln" => coreutils::commands::Ln,
         "dirname" => coreutils::commands::Dirname,
+        "dos2unix" => coreutils::commands::Dos2Unix,
+        "unix2dos" => coreutils::commands::Unix2Dos,
         "box" => Boxcmd
     });