lab1
This commit is contained in:
340
Cargo.lock
generated
Normal file
340
Cargo.lock
generated
Normal file
@@ -0,0 +1,340 @@
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||||
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name = "zerocopy-derive"
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dependencies = [
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"proc-macro2",
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||||
"quote",
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"syn",
|
||||
]
|
||||
@@ -4,3 +4,6 @@ version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.87"
|
||||
clap = { version = "4.5.17", features = ["derive"] }
|
||||
rand = "0.8.5"
|
||||
|
||||
28
src/cli.rs
Normal file
28
src/cli.rs
Normal file
@@ -0,0 +1,28 @@
|
||||
use std::path::PathBuf;
|
||||
|
||||
#[derive(Debug, clap::Parser)]
|
||||
#[command(author, version, about, long_about = None)]
|
||||
pub struct Args {
|
||||
#[clap(subcommand)]
|
||||
pub command: Command,
|
||||
}
|
||||
|
||||
#[derive(Debug, clap::Subcommand)]
|
||||
pub enum Command {
|
||||
Generate {
|
||||
#[clap(short, long)]
|
||||
output: PathBuf,
|
||||
#[clap(short, long, value_parser = clap::value_parser!(u32).range(1..))]
|
||||
lines: u32,
|
||||
#[clap(long = "min-op", value_parser = clap::value_parser!(u32).range(1..))]
|
||||
min_operands: u32,
|
||||
#[clap(long = "max-op", value_parser = clap::value_parser!(u32).range(1..))]
|
||||
max_operands: u32,
|
||||
},
|
||||
Translate {
|
||||
#[clap(short, long)]
|
||||
input: PathBuf,
|
||||
#[clap(short, long)]
|
||||
output: PathBuf,
|
||||
},
|
||||
}
|
||||
125
src/main.rs
125
src/main.rs
@@ -1,3 +1,124 @@
|
||||
fn main() {
|
||||
println!("Hello, world!");
|
||||
use std::{
|
||||
collections::HashMap,
|
||||
io::{Read, Write},
|
||||
sync::OnceLock,
|
||||
};
|
||||
|
||||
use clap::{CommandFactory, Parser};
|
||||
use rand::Rng;
|
||||
|
||||
mod cli;
|
||||
|
||||
static OPERANDS: &str = "+-*/";
|
||||
static DIGITS: &str = "123456789";
|
||||
|
||||
static TRANSLATION_TABLE: OnceLock<HashMap<&'static str, &'static str>> = OnceLock::new();
|
||||
|
||||
fn valudate_args(args: cli::Args) -> Result<cli::Args, clap::Error> {
|
||||
match &args.command {
|
||||
cli::Command::Generate {
|
||||
min_operands,
|
||||
max_operands,
|
||||
..
|
||||
} => {
|
||||
if min_operands > max_operands {
|
||||
return Err(clap::Error::raw(
|
||||
clap::error::ErrorKind::ValueValidation,
|
||||
"min operands must not be greater than max operands",
|
||||
));
|
||||
}
|
||||
}
|
||||
cli::Command::Translate { input, output } => {
|
||||
if input == output {
|
||||
return Err(clap::Error::raw(
|
||||
clap::error::ErrorKind::ValueValidation,
|
||||
"input and output must not be the same",
|
||||
));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Ok(args)
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let args = match valudate_args(cli::Args::parse()) {
|
||||
Ok(args) => args,
|
||||
Err(err) => {
|
||||
let mut command = cli::Args::command();
|
||||
err.format(&mut command).exit();
|
||||
}
|
||||
};
|
||||
|
||||
match args.command {
|
||||
cli::Command::Generate {
|
||||
output,
|
||||
lines,
|
||||
min_operands,
|
||||
max_operands,
|
||||
} => {
|
||||
let mut rand = rand::thread_rng();
|
||||
let mut output = std::fs::File::create(output).unwrap();
|
||||
for _ in 0..lines {
|
||||
let operands = rand.gen_range(min_operands..max_operands + 1);
|
||||
for _ in 0..operands {
|
||||
let digit = rand.gen_range(0..DIGITS.len());
|
||||
let operand = rand.gen_range(0..OPERANDS.len());
|
||||
|
||||
let digit = DIGITS.get(digit..digit + 1).unwrap();
|
||||
let operand = OPERANDS.get(operand..operand + 1).unwrap();
|
||||
|
||||
output.write(digit.as_bytes()).unwrap();
|
||||
output.write(b" ").unwrap();
|
||||
output.write(operand.as_bytes()).unwrap();
|
||||
output.write(b" ").unwrap();
|
||||
}
|
||||
|
||||
let digit = rand.gen_range(0..DIGITS.len());
|
||||
let digit = DIGITS.get(digit..digit + 1).unwrap();
|
||||
output.write(digit.as_bytes()).unwrap();
|
||||
|
||||
output.write(b"\n").unwrap();
|
||||
}
|
||||
}
|
||||
cli::Command::Translate { input, output } => {
|
||||
let table = TRANSLATION_TABLE.get_or_init(|| {
|
||||
HashMap::from([
|
||||
("+", "add"),
|
||||
("-", "subtract"),
|
||||
("*", "multiply by"),
|
||||
("/", "divide by"),
|
||||
("0", "zero"),
|
||||
("1", "one"),
|
||||
("2", "two"),
|
||||
("3", "three"),
|
||||
("4", "four"),
|
||||
("5", "five"),
|
||||
("6", "six"),
|
||||
("7", "seven"),
|
||||
("8", "eight"),
|
||||
("9", "nine"),
|
||||
])
|
||||
});
|
||||
|
||||
let mut input = std::fs::File::open(input).unwrap();
|
||||
let mut output = std::fs::File::create(output).unwrap();
|
||||
|
||||
let mut buf = [0u8; 1];
|
||||
|
||||
loop {
|
||||
match input.read(&mut buf) {
|
||||
Ok(0) => break,
|
||||
Ok(_) => {
|
||||
let digit = std::str::from_utf8(&buf).unwrap();
|
||||
match table.get(digit) {
|
||||
Some(translation) => output.write(translation.as_bytes()).unwrap(),
|
||||
None => output.write(digit.as_bytes()).unwrap(),
|
||||
};
|
||||
}
|
||||
Err(err) => panic!("{}", err),
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user