neilg63 / bigdec-extras

BigDecimal Extras

This crate adds the core power and trigonomtric methods to the BigDecimal crate using a pre-calculated PI value accurate to 100 decimal places.

• pow(n: i32) acts only integers and is always faster than the equivalent with a BigDecimal exponent
• powf(big: BigDecimal) works with any BigDecimal exponent, but may be slow
• root(n: i32) works only with integers, but faster than powf() with a BigDecimal exponent
• smart_round(n: u8) Round the nearest n digits and then remove all trailing zeroes after the last signifying decimal digit.
• calc_pi() Calculates PI to high precision from a constant string
• sin() sine of angle in radians
• cos() cosine of angle in radians
• tan() tangent of angle in radians