precision-core

Deterministic fixed-point arithmetic for financial computation.

Features

• 128-bit decimal arithmetic with up to 28 significant digits
• no_std compatible for embedded and WASM targets
• 7 rounding modes including banker's rounding
• Deterministic results across all platforms
• Zero unsafe code

Usage

use precision_core::{Decimal, RoundingMode};

// From integers
let a = Decimal::from(100i64);

// From mantissa and scale: value = mantissa * 10^(-scale)
let b = Decimal::new(12345, 2);  // 123.45

// Checked arithmetic
let sum = a.checked_add(b).unwrap();
let product = a.checked_mul(b).unwrap();

// Rounding
let rounded = b.round(1, RoundingMode::HalfUp);  // 123.5

Rounding Modes

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.