compa_decimal

A compact and efficient decimal system using a custom character set for representing large numbers in fewer characters.

Features

• Custom Character Set: Uses numbers, uppercase and lowercase letters, and special characters for a base-96 numeral system.
• Supports Multiple Numeric Types: Easily convert between unsigned integers (u8, u16, u32, u64, u128) and the CompaDecimal format.
• Now Supports arbitrarily large numbers: Easily convert between BigUint and the CompaDecimal format.
• Conversion Utilities: Convert between standard decimal numbers and the compact CompaDecimal representation.

Usage

Add to your Cargo.toml:

[dependencies]
compa_decimal = "0.1.1"

Import in your Rust code:

use compa_decimal::CompaDecimal;

Examples

Creating a New CompaDecimal

let compa = CompaDecimal::new();
assert_eq!(compa, "0");

Parsing from &str

let compa: CompaDecimal = "123asd".parse().unwrap();
assert_eq!(compa, "123asd");

Decimal to CompaDecimal

let compa = CompaDecimal::decimal_to_compa::<u64>(123456789).unwrap();
assert_eq!(compa, "1LY7VK");

BigUint to CompaDecimal

let compa = CompaDecimal::biguint_to_compa::(BigUint::from(123456789_u128)).unwrap();
assert_eq!(compa, "1T~PC");

Get Value

let compa = "1LY7VK".parse::<CompaDecimal>().unwrap();
let compa_value = compa.get_value();
assert_eq!(compa_value, "1LY7VK");

Increment and Decrement

let compa = "A1".parse::<CompaDecimal>().unwrap();
let increased = compa.plus_one().unwrap();
assert_eq!(increased.get_value(), "A2");

let decreased = increased.minus_one().unwrap();
assert_eq!(decreased.get_value(), "A1");

Add and Subtract

let compa = "ASr35".parse::<CompaDecimal>().unwrap();
let new_compa = compa.add("as1Ad4").unwrap();
assert_eq!(new_compa.get_value(), "axswF9");

let subtracted = new_compa.subtract("as1Ad4").unwrap();
assert_eq!(subtracted.get_value(), "ASr35");

Compare

use std::cmp::Ordering;

let compa = "axswF9".parse::<CompaDecimal>().unwrap();
assert_eq!(compa.cmp_str("axswF8").unwrap(), Ordering::Greater);

Length

let compa = "1LY7VK".parse::<CompaDecimal>().unwrap();
assert_eq!(compa.len(), 6);

Convert Back to Decimal

let compa = "1LY7VK".parse::<CompaDecimal>().unwrap();
let decimal: u64 = compa.to_decimal().unwrap();
assert_eq!(decimal, 123456789);

Convert Back to BigUint

let compa = "1T~PC".parse::<CompaDecimal>().unwrap();
let biguint = compa.to_biguint().unwrap();
assert_eq!(biguint, 123456789);

Compare to string

You can compare a CompaDecimal directly with a string:

let compa = "123asd".parse::<CompaDecimal>().unwrap();
assert_eq!(compa, "123asd");
assert_ne!(compa, "not_equal");

Attempt to convert string to CompaDecimal

You can use TryFrom to create a CompaDecimal from a string, which returns a Result:

use std::convert::TryFrom;

let compa = CompaDecimal::try_from("123asd").unwrap();
assert_eq!(compa, "123asd");

// This will return an error if the string contains invalid characters
let invalid = CompaDecimal::try_from("123asd£");
assert!(invalid.is_err());

You can also use try_into for ergonomic conversion:

use std::convert::TryInto;

let compa: CompaDecimal = "123asd".try_into().unwrap();
assert_eq!(compa, "123asd");

Error Handling

Most methods return a Result and will return an error if:

• The input contains invalid characters.
• The operation would result in a negative value.
• The value is too large for the target integer type.

License

Licensed under MIT OR Apache-2.0.