From 3d540d8a3daf41a1d856213c410bdb59f26ebfbe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hozda?= <luk.hozda@gmail.com>
Date: Tue, 18 Aug 2020 20:24:17 +0200
Subject: [PATCH] remove more useless mutability, fix warnings, remove features

---
 src/main.rs | 65 +++++++++++++++++++++--------------------------------
 1 file changed, 25 insertions(+), 40 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 0307046..838a983 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,16 +1,5 @@
-#![allow(
-	dead_code,
-	mutable_transmutes,
-	non_camel_case_types,
-	non_snake_case,
-	non_upper_case_globals,
-	unused_assignments,
-	unused_mut
-)]
-#![register_tool(c2rust)]
-#![feature(const_raw_ptr_to_usize_cast, extern_types, main, register_tool)]
-
-extern crate libc;
+#![feature(main)]
+
 extern crate tempfile;
 extern crate simple_input;
 
@@ -113,7 +102,7 @@ impl BrowserState {
 	}
 
 	pub unsafe fn load_config<P: AsRef<Path>>(&mut self, filename: P) {
-		let mut file = match File::open(filename) {
+		let file = match File::open(filename) {
 			Ok(f) => BufReader::new(f),
 			Err(_) => {
 				return;
@@ -143,7 +132,7 @@ impl BrowserState {
 		if self.config.verbose {
 			eprintln!("downloading [{}]...", selector);
 		}
-		let mut stream = dial(&host, port, selector);
+		let stream = dial(&host, port, selector);
 		if stream.is_none() {
 			eprintln!("error: downloading [{}] failed", selector);
 			return false;
@@ -198,7 +187,7 @@ impl BrowserState {
 		if host.is_empty() || port == 0 || selector.is_empty() {
 			return;
 		}
-		let mut link = Link {
+		let link = Link {
 			which: Some(which as u8 as char),
 			key: self.link_key,
 			host,
@@ -220,7 +209,7 @@ impl BrowserState {
 	}
 
 	pub unsafe fn add_history(&mut self) {
-		let mut link: Link = Link {
+		let link: Link = Link {
 			which:    None,
 			key:      0,
 			host:     self.current_host.clone(),
@@ -368,7 +357,7 @@ impl BrowserState {
 	) {
 		let mut filename: String =
 			Path::new(selector).file_name().unwrap_or_default().to_string_lossy().into();
-		let mut line: String = match input(&format!(
+		let line: String = match input(&format!(
 			"enter filename for download [{}]: ",
 			filename
 		))
@@ -416,7 +405,7 @@ impl BrowserState {
 		let mut a: char = '\0';
 		let mut b: char = '\0';
 		let mut c: char = '\0';
-		let mut link: Option<Box<Link>> = None;
+		let mut link: Option<Box<Link>>;
 		if self.history.is_none() {
 			println!("(empty history)");
 			return;
@@ -451,15 +440,13 @@ impl BrowserState {
 		};
 	}
 
-	pub unsafe fn view_bookmarks(&mut self, mut key: Option<usize>) {
-		let mut i: usize = 0;
+	pub unsafe fn view_bookmarks(&mut self, key: Option<usize>) {
 		let mut a: char = '\0';
 		let mut b: char = '\0';
 		let mut c: char = '\0';
 		if key.is_none() {
 			println!("(bookmarks)");
-			i = 0;
-			for bookmark in &self.bookmarks {
+			for (i, bookmark) in self.bookmarks.iter().enumerate() {
 				make_key_str(i, &mut a, &mut b, &mut c);
 				println!("{}{}{} {}", a, b, c, bookmark);
 			}
@@ -501,7 +488,7 @@ impl BrowserState {
 		}
 	}
 
-	pub unsafe fn follow_link(&mut self, mut key: usize) -> bool {
+	pub unsafe fn follow_link(&mut self, key: usize) -> bool {
 		let mut link: Option<Box<Link>> = self.links.clone();
 
 		while let Some(ref l) = link {
@@ -569,7 +556,7 @@ impl BrowserState {
 		return false;
 	}
 
-	pub unsafe fn download_link(&mut self, mut key: usize) {
+	pub unsafe fn download_link(&mut self, key: usize) {
 		let mut link: Option<Box<Link>> = self.links.clone();
 		while let Some(l) = link {
 			if (*l).key != key {
@@ -626,14 +613,12 @@ impl BrowserState {
 		true
 	}
 
-	pub unsafe fn init(&mut self, mut argc: usize, mut argv: Vec<String>) -> libc::c_int {
-		let mut i: usize = 0;
-		let mut uri: String = String::new();
+	pub unsafe fn init(&mut self, argc: usize, argv: Vec<String>) -> i32 {
+		let mut i: usize = 1;
 		/* copy defaults */
 		self.init_config();
-		uri = self.config.start_uri.clone();
+		let mut uri: String = self.config.start_uri.clone();
 		/* parse command line */
-		i = 1;
 		while i < argc {
 			if argv[i].chars().next() == Some('-') {
 				match argv[i].chars().skip(1).next() {
@@ -754,9 +739,9 @@ pub fn banner(to_error: bool) {
 }
 
 pub unsafe fn dial(
-	mut host: &str,
-	mut port: u16,
-	mut selector: &str,
+	host: &str,
+	port: u16,
+	selector: &str,
 ) -> Option<TcpStream> {
 	let mut stream = match TcpStream::connect((host, port)) {
 		Ok(s) => s,
@@ -774,7 +759,7 @@ pub unsafe fn dial(
 	Some(stream)
 }
 
-pub unsafe fn make_key(mut c1: char, mut c2: char, mut c3: char) -> Option<usize> {
+pub unsafe fn make_key(c1: char, c2: char, c3: char) -> Option<usize> {
 	if c1 == '\0' || c2 == '\0' {
 		return None;
 	}
@@ -794,10 +779,10 @@ pub unsafe fn make_key(mut c1: char, mut c2: char, mut c3: char) -> Option<usize
 	}
 }
 pub unsafe fn make_key_str(
-	mut key: usize,
-	mut c1: &mut char,
-	mut c2: &mut char,
-	mut c3: &mut char,
+	key: usize,
+	c1: &mut char,
+	c2: &mut char,
+	c3: &mut char,
 ) {
 	if key
 		< ('z' as usize - 'a' as usize + 1 as usize)
@@ -830,7 +815,7 @@ pub unsafe fn is_valid_directory_entry(kind: char) -> bool {
 	}
 }
 
-pub unsafe fn view_telnet(mut host: &str, mut port: u16) {
+pub unsafe fn view_telnet(host: &str, port: u16) {
 	println!("executing: telnet {} {}", host, port);
 
 	// TODO check stdio
@@ -847,6 +832,6 @@ pub unsafe fn view_telnet(mut host: &str, mut port: u16) {
 #[main]
 pub fn main() {
 	let mut state = BrowserState::new();
-	let mut args: Vec<String> = env::args().collect();
+	let args: Vec<String> = env::args().collect();
 	unsafe { exit(state.init(args.len() - 1, args) as i32) }
 }