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