changes for idiomatic code, extract utility functions to util.rs

src/main.rs

@@ -9,8 +9,7 @@ use std::process::{exit, Command};
 use std::thread::sleep;
 use std::time::Duration;
 use std::fs::{self, File};
-use std::io::{Write, Read, self};
+use std::io::{Read, self};
-use std::net::TcpStream;
 
 use simple_input::input;
 use tempfile::NamedTempFile;
@@ -18,7 +17,9 @@ use tempfile::NamedTempFile;
 mod config;
 use config::{Config};
 
-/* structs */
+mod util;
+use util::{usage, banner, dial, make_key, make_key_str, is_valid_directory_entry, view_telnet};
+
 #[derive(Clone, Debug)]
 pub struct Link {
 	pub next:     Option<Box<Link>>,
@@ -63,7 +64,7 @@ impl BrowserState {
 	}
 
 	pub fn download_file(
-		&mut self,
+		&self,
 		host: &str,
 		port: u16,
 		selector: &str,
@@ -319,7 +320,6 @@ impl BrowserState {
 				return;
 			}
 		};
-		// O_CREAT, O_NOCTTY, O_WRONLY, O_EXCL
 		if !self.download_file(host, port, selector, &mut file) {
 			println!("error: unable to download [{}]", selector);
 			fs::remove_file(filename).expect("failed to delete file");
@@ -359,7 +359,7 @@ impl BrowserState {
 				let fresh10 = history_key;
 				history_key = history_key + 1;
 				make_key_str(fresh10, &mut a, &mut b, &mut c);
-				println!("{}{}{} {}:{}/{}", a, b, c, (*l).host, (*l).port, (*l).selector,);
+				bunt::println!("{[green]}{[green]}{[green]} {}:{}/{}", a, b, c, (*l).host, (*l).port, (*l).selector,);
 				link = (*l).next
 			}
 		} else if let Some(key) = key {
@@ -491,9 +491,8 @@ impl BrowserState {
 				}
 				return true;
 			}
-			/* return the array is broken after view! */
 		}
-		return false;
+		false
 	}
 
 	pub fn download_link(&mut self, key: usize) {
@@ -553,7 +552,7 @@ impl BrowserState {
 		true
 	}
 
-	pub fn init(&mut self, argc: usize, argv: Vec<String>) -> i32 {
+	pub fn init(&mut self, argv: Vec<String>) -> i32 {
 		let mut i: usize = 1;
 		/* copy defaults */
 		self.config.init();
@@ -561,7 +560,7 @@ impl BrowserState {
 
 		let mut uri: String = self.config.start_uri.clone();
 		/* parse command line */
-		while i < argc {
+		while i < argv.len() {
 			if argv[i].chars().next() == Some('-') {
 				match argv[i].chars().skip(1).next() {
 					Some('H') => {
@@ -674,116 +673,11 @@ impl BrowserState {
 				_ => (),
 			}
 		}
-		/* never get's here but stops cc complaining */
-	}
-}
-
-/* implementation */
-pub fn usage() {
-	eprintln!("usage: cgo [-v] [-H] [gopher URI]");
-	exit(0);
-}
-pub fn banner(to_error: bool) {
-	if to_error {
-		eprintln!("cgo 0.6.1  Copyright (c) 2020  Sebastian Steinhauer");
-	} else {
-		println!("cgo 0.6.1  Copyright (c) 2020  Sebastian Steinhauer");
-	}
-}
-
-pub fn dial(
-	host: &str,
-	port: u16,
-	selector: &str,
-) -> Option<TcpStream> {
-	let mut stream = match TcpStream::connect((host, port)) {
-		Ok(s) => s,
-		Err(e) => {
-			eprintln!("failed to dial server: {}", e);
-			return None;
-		}
-	};
-
-	if let Err(e) = writeln!(stream, "{}", selector) {
-		eprintln!("failed to send request to server: {}", e);
-		return None;
-	};
-
-	Some(stream)
-}
-
-pub fn make_key(c1: char, c2: char, c3: char) -> Option<usize> {
-	if c1 == '\0' || c2 == '\0' {
-		return None;
-	}
-	if c3 == '\0' {
-		Some(
-			(c1 as u8 - 'a' as u8) as usize * ('z' as usize - 'a' as usize + 1)
-				+ (c2 as u8 - 'a' as u8) as usize,
-		)
-	} else {
-		Some(
-			((c1 as u8 - 'a' as u8) as usize + 1)
-				* ('z' as usize - 'a' as usize + 1)
-				* ('z' as usize - 'a' as usize + 1)
-				+ ((c2 as u8 - 'a' as u8) as usize) * ('z' as usize - 'a' as usize + 1)
-				+ ((c3 as u8 - 'a' as u8) as usize),
-		)
-	}
-}
-pub fn make_key_str(
-	key: usize,
-	c1: &mut char,
-	c2: &mut char,
-	c3: &mut char,
-) {
-	if key
-		< ('z' as usize - 'a' as usize + 1 as usize)
-			* ('z' as usize - 'a' as usize + 1 as usize)
-	{
-		*c1 = ('a' as usize + key / ('z' as usize - 'a' as usize + 1 as usize)) as u8
-			as char;
-		*c2 = ('a' as usize + key % ('z' as usize - 'a' as usize + 1 as usize)) as u8
-			as char;
-		*c3 = 0 as usize as u8 as char
-	} else {
-		*c1 = ('a' as usize
-			+ key
-				/ (('z' as usize - 'a' as usize + 1 as usize)
-					* ('z' as usize - 'a' as usize + 1 as usize))
-			- 1 as usize) as u8 as char;
-		*c2 = ('a' as usize
-			+ key / ('z' as usize - 'a' as usize + 1 as usize)
-				% ('z' as usize - 'a' as usize + 1 as usize)) as u8 as char;
-		*c3 = ('a' as usize + key % ('z' as usize - 'a' as usize + 1 as usize)) as u8
-			as char
-	};
-}
-
-pub fn is_valid_directory_entry(kind: char) -> bool {
-	match kind {
-		'i' | '3' | '.' | '0' | '1' | '5' | '7' | '8' | '9' | 'g' | 'I' | 'p' | 'h' | '2' | 'd'
-		| 's' => true,
-		_ => false,
-	}
-}
-
-pub fn view_telnet(host: &str, port: u16) {
-	println!("executing: telnet {} {}", host, port);
-
-	// TODO check stdio
-	match Command::new("telnet").arg(host).arg(port.to_string()).spawn() {
-		Ok(mut c) =>
-			if let Err(e) = c.wait() {
-				eprintln!("failed to wait for telnet: {}", e);
-			},
-		Err(e) => eprintln!("failed to start telnet: {}", e),
 	}
-	println!("(done)");
 }
 
 fn main() {
 	let mut state = BrowserState::new();
 	let args: Vec<String> = env::args().collect();
-	exit(state.init(args.len() - 1, args) as i32)
+	exit(state.init(args))
 }

src/util.rs

@@ -0,0 +1,108 @@
+use std::io::Write;
+use std::net::TcpStream;
+use std::process::{Command, exit};
+
+pub fn usage() {
+	eprintln!("usage: rgp [-v] [-H] [gopher URI]");
+	exit(0);
+}
+
+pub fn banner(to_error: bool) {
+	if to_error {
+		eprintln!("rgp 0.3.3  Copyright (c) 2020  Lukáš Hozda");
+	} else {
+		println!("rgp 0.3.3  Copyright (c) 2020  Lukáš Hozda");
+	}
+}
+
+pub fn dial(
+	host: &str,
+	port: u16,
+	selector: &str,
+) -> Option<TcpStream> {
+	let mut stream = match TcpStream::connect((host, port)) {
+		Ok(s) => s,
+		Err(e) => {
+			eprintln!("failed to dial server: {}", e);
+			return None;
+		}
+	};
+
+	if let Err(e) = writeln!(stream, "{}", selector) {
+		eprintln!("failed to send request to server: {}", e);
+		return None;
+	};
+
+	Some(stream)
+}
+
+pub fn make_key(c1: char, c2: char, c3: char) -> Option<usize> {
+	if c1 == '\0' || c2 == '\0' {
+		return None;
+	}
+	if c3 == '\0' {
+		Some(
+			(c1 as u8 - 'a' as u8) as usize * ('z' as usize - 'a' as usize + 1)
+				+ (c2 as u8 - 'a' as u8) as usize,
+		)
+	} else {
+		Some(
+			((c1 as u8 - 'a' as u8) as usize + 1)
+				* ('z' as usize - 'a' as usize + 1)
+				* ('z' as usize - 'a' as usize + 1)
+				+ ((c2 as u8 - 'a' as u8) as usize) * ('z' as usize - 'a' as usize + 1)
+				+ ((c3 as u8 - 'a' as u8) as usize),
+		)
+	}
+}
+pub fn make_key_str(
+	key: usize,
+	c1: &mut char,
+	c2: &mut char,
+	c3: &mut char,
+) {
+	if key
+		< ('z' as usize - 'a' as usize + 1 as usize)
+			* ('z' as usize - 'a' as usize + 1 as usize)
+	{
+		*c1 = ('a' as usize + key / ('z' as usize - 'a' as usize + 1 as usize)) as u8
+			as char;
+		*c2 = ('a' as usize + key % ('z' as usize - 'a' as usize + 1 as usize)) as u8
+			as char;
+		*c3 = 0 as usize as u8 as char
+	} else {
+		*c1 = ('a' as usize
+			+ key
+				/ (('z' as usize - 'a' as usize + 1 as usize)
+					* ('z' as usize - 'a' as usize + 1 as usize))
+			- 1 as usize) as u8 as char;
+		*c2 = ('a' as usize
+			+ key / ('z' as usize - 'a' as usize + 1 as usize)
+				% ('z' as usize - 'a' as usize + 1 as usize)) as u8 as char;
+		*c3 = ('a' as usize + key % ('z' as usize - 'a' as usize + 1 as usize)) as u8
+			as char
+	};
+}
+
+pub fn is_valid_directory_entry(kind: char) -> bool {
+	match kind {
+		'i' | '3' | '.' | '0' | '1' | '5' | '7' | '8' | '9' | 'g' | 'I' | 'p' | 'h' | '2' | 'd'
+		| 's' => true,
+		_ => false,
+	}
+}
+
+pub fn view_telnet(host: &str, port: u16) {
+	println!("executing: telnet {} {}", host, port);
+
+	// TODO check stdio
+	match Command::new("telnet").arg(host).arg(port.to_string()).spawn() {
+		Ok(mut c) =>
+			if let Err(e) = c.wait() {
+				eprintln!("failed to wait for telnet: {}", e);
+			},
+		Err(e) => eprintln!("failed to start telnet: {}", e),
+	}
+	println!("(done)");
+}
+