output a random number #21

Merged
PlexSheep merged 5 commits from feat/rand into devel 2024-05-23 13:25:16 +02:00
3 changed files with 48 additions and 2 deletions

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@ -19,4 +19,5 @@ clap = { version = "4.5.4", features = ["derive"] }
fast32 = "1.0.2"
libpt = { version = "0.5.1", features = ["bintols"], default-features = false }
num = "0.4.3"
rand = "0.8.5"

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@ -86,6 +86,16 @@ pub struct FormatOptions {
#[arg(short = 's', long)]
/// format to base64
base64: bool,
#[arg(short = 'r', long, default_value_t = 0, value_parser=numf_parser::<NumberType>)]
/// output random numbers
///
/// Add a user defined amount of cryptographically pseudorandom numbers to the number list.
rand: NumberType,
#[arg(long, default_value_t = NumberType::MAX, value_parser=numf_parser::<NumberType>)]
/// max for the random numbers
///
/// Generated numbers will not be lower than this. Only has an effect with --rand set.
rand_max: NumberType,
#[arg(short = 'z', long)]
/// format to base32
base32: bool,
@ -183,6 +193,26 @@ impl FormatOptions {
pub fn push_number(&mut self, value: NumberType) {
self.numbers.push(value)
}
/// get rand
pub fn rand(&self) -> NumberType {
self.rand
}
/// set amount of extra random numbers manually
pub fn set_rand(&mut self, rand: NumberType) {
self.rand = rand;
}
/// get highes allowed random value
pub fn rand_max(&self) -> NumberType {
self.rand_max
}
/// set highes allowed random value
pub fn set_rand_max(&mut self, rand_max: NumberType) {
self.rand_max = rand_max;
}
}
impl Default for FormatOptions {
@ -197,6 +227,8 @@ impl Default for FormatOptions {
base64: false,
dec: false,
numbers: vec![],
rand: 0,
rand_max: NumberType::MAX,
}
}
}

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@ -12,7 +12,7 @@ mod format;
use format::*;
use numf::format::numf_parser;
fn main() {
fn main() -> anyhow::Result<()> {
// try to read from stdin first, appending the numbers we read to the FormatOptions
let mut options = FormatOptions::parse();
let mut stdin_nums = Vec::new();
@ -23,6 +23,7 @@ fn main() {
let whole: String = match String::from_utf8(stdin_nums) {
Ok(r) => r,
Err(e) => {
eprintln!("{}", FormatOptions::command().render_usage());
eprintln!("stdin for this program only accepts text: {e:#?}");
exit(1);
}
@ -32,6 +33,7 @@ fn main() {
let number = match numf_parser(s) {
Ok(n) => n,
Err(e) => {
eprintln!("{}", FormatOptions::command().render_usage());
eprintln!("could not parse number from stdin: {e:#?}");
exit(2);
}
@ -40,14 +42,24 @@ fn main() {
}
}
Err(e) => {
eprintln!("{}", FormatOptions::command().render_usage());
eprintln!("could not read from stdin: {e:#?}");
exit(2);
}
};
}
if options.rand() > 0 {
use rand::prelude::*;
let mut rand = rand::rngs::OsRng;
for _i in 0..options.rand() {
options.push_number(rand.gen_range(0..options.rand_max()));
}
}
if options.numbers().is_empty() {
format!("{}", FormatOptions::command().render_usage());
eprintln!("{}", FormatOptions::command().render_usage());
eprintln!("no numbers have been provided");
exit(1);
}
@ -59,4 +71,5 @@ fn main() {
for o in out {
println!("{o}")
}
Ok(())
}