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#![allow(non_snake_case)] #[macro_use] extern crate lazy_static; mod prelude; use prelude::*; /// struct `RandPwd` #[derive(Clone, Debug)] pub struct RandPwd { ltr_cnt: BigUint, sbl_cnt: BigUint, num_cnt: BigUint, content: String, // TODO: - use the heapless String _UNIT: usize, // TODO: - implement a smart _UNIT initialization to get best performance } pub trait ToRandPwd { fn to_randpwd(&self) -> Option<RandPwd>; } impl RandPwd { /// Return an empty instance of `Result<RandPwd, &'static str>` /// # Example /// ``` /// use rpg::RandPwd; /// use num_bigint::BigUint; /// let mut r_p = RandPwd::new(11, 4, 2); /// /// // If you want push a large number in it /// // parse the `&str` into `BigUint` /// use std::str::FromStr; /// /// let ltr_cnt = BigUint::from_str(&format!("{}000", usize::MAX)).unwrap(); /// let sbl_cnt = BigUint::from_str(&format!("{}000", usize::MAX)).unwrap(); /// let num_cnt = BigUint::from_str(&format!("{}000", usize::MAX)).unwrap(); /// /// r_p = RandPwd::new(ltr_cnt, sbl_cnt, num_cnt); /// /// // You can also mix the `BigUint` with primitive type /// ``` #[inline] pub fn new<L, S, N>(ltr_cnt: L, sbl_cnt: S, num_cnt: N) -> Self where L: ToBigUint, S: ToBigUint, N: ToBigUint, { RandPwd { ltr_cnt: ltr_cnt.to_biguint().unwrap(), sbl_cnt: sbl_cnt.to_biguint().unwrap(), num_cnt: num_cnt.to_biguint().unwrap(), content: String::new(), _UNIT: 1 } } /// Return the content of random password in `&str` /// # Example /// /// ``` /// use rpg::RandPwd; /// let r_p = RandPwd::new(10, 2, 3); /// assert_eq!("", r_p.val()) /// ``` #[inline] pub fn val(&self) -> &str { &self.content } /// Change the content of `RandPwd` #[inline] pub fn set_val(&mut self, val: &str) { self.content = val.to_string(); } /// Return the value of `UNIT` #[inline] pub fn unit(&self) -> usize { self._UNIT } /// The value of UNIT is inversely proportional to memory overhead /// In order to reduce the memory overhead, raise the value of `UNIT` #[inline] pub fn set_unit(&mut self, val: usize) { self._UNIT = val; } /// Returns the length of this `RandPwd`, in both bytes and [char]s. #[inline] pub fn len(&self) -> usize { self.content.len() } /// Returns true if this `RandPwd` has a length of zero, and false otherwise. #[inline] pub fn is_empty(&self) -> bool { self.content.is_empty() } /// Get count of `RandPwd` /// ``` /// use rpg::RandPwd; /// use num_traits::ToPrimitive; /// let r_p = RandPwd::new(10, 2, 3); /// assert_eq!(r_p.get_cnt("ltr").unwrap().to_usize().unwrap(), 10); /// assert_eq!(r_p.get_cnt("sbl").unwrap().to_usize().unwrap(), 2); /// assert_eq!(r_p.get_cnt("num").unwrap().to_usize().unwrap(), 3); /// ``` #[inline] pub fn get_cnt(&self, kind: &str) -> Option<&BigUint> { match kind { "ltr" => Some(&self.ltr_cnt), "sbl" => Some(&self.sbl_cnt), "num" => Some(&self.num_cnt), _ => None, } } /// Change the count of letters, symbols or numbers of `RandPwd` /// ``` /// use rpg::*; /// let mut r_p = RandPwd::new(10, 2, 3); /// /// // Set the letter's count /// r_p.set_cnt("ltr", 0); /// r_p.join(); /// println!("{}", r_p.val()); /// // Output: *029( /// /// // Set the symbol's count /// r_p.set_cnt("sbl", 0); /// r_p.join(); /// println!("{}", r_p.val()); /// // Output: nz1MriAl0j5on /// /// // Set the number's count /// r_p.set_cnt("num", 0); /// r_p.join(); /// println!("{}", r_p.val()); /// // Output: +iQiQGSXl(nv /// ``` #[inline] pub fn set_cnt<T: ToBigUint>(&mut self, kind: &str, val: T) -> Option<()> { match kind { "ltr" => self.ltr_cnt = val.to_biguint()?, "sbl" => self.sbl_cnt = val.to_biguint()?, "num" => self.num_cnt = val.to_biguint()?, _ => (), } Some(()) } /// Generate the password for `RandPwd` /// ``` /// use rpg::RandPwd; /// let mut r_p = RandPwd::new(10, 2, 3); /// r_p.join(); /// println!("{}", r_p); /// ``` #[inline] pub fn join(&mut self) { let mut PWD: String = _PWD(&self); // This is absolutely safe, because they are all ASCII characters except control ones. let bytes = unsafe { PWD.as_bytes_mut() }; bytes.shuffle(&mut thread_rng()); self.content = bytes.par_iter().map(|s| *s as char).collect::<String>(); } }