bignum

Arbitrary Precision Integers

Constants

BN_BASE = 1000000000

Function	Description
`_bn_alloc`	Internal: allocate BigNum with given limb capacity.
`bn_new`	Create BigNum from i64 value.
`bn_from_str`	Parse decimal string to BigNum. Handles optional leading ‘-’.
`bn_abs_cmp`	Compare magnitudes (ignoring sign). Returns -1, 0, or 1.
`bn_cmp`	Compare two BigNums. Returns -1, 0, or 1.
`_bn_add_mag`	Internal: add magnitudes. Both must be non-negative limb arrays.
`_bn_sub_mag`	Internal: subtract magnitudes.
`bn_add`	Add two BigNums.
`bn_sub`	Subtract: a - b.
`bn_mul`	Multiply two BigNums. Grade-school algorithm.
`bn_is_zero`	Check if BigNum is zero.
`bn_negate`	Negate: return new BigNum with flipped sign.
`bn_to_str`	Convert BigNum to decimal string. Returns length written.
`bn_to_i64`	Convert BigNum to i64 (truncates if too large).

fn _bn_alloc(cap: i64) -> &i64

Internal: allocate BigNum with given limb capacity.

fn bn_new(val: i64) -> &i64

Create BigNum from i64 value.

fn bn_from_str(s: &i8, slen: i64) -> &i64

Parse decimal string to BigNum. Handles optional leading ‘-’.

fn bn_abs_cmp(a: &i64, b: &i64) -> i64

Compare magnitudes (ignoring sign). Returns -1, 0, or 1.

fn bn_cmp(a: &i64, b: &i64) -> i64

Compare two BigNums. Returns -1, 0, or 1.

fn _bn_add_mag(a: &i64, b: &i64) -> &i64

Internal: add magnitudes. Both must be non-negative limb arrays.

fn _bn_sub_mag(a: &i64, b: &i64) -> &i64

Internal: subtract magnitudes. |a| must be >= |b|.

fn bn_add(a: &i64, b: &i64) -> &i64

Add two BigNums.

fn bn_sub(a: &i64, b: &i64) -> &i64

Subtract: a - b.

fn bn_mul(a: &i64, b: &i64) -> &i64

Multiply two BigNums. Grade-school algorithm.

fn bn_is_zero(a: &i64) -> i64

Check if BigNum is zero.

fn bn_negate(a: &i64) -> &i64

Negate: return new BigNum with flipped sign.

fn bn_to_str(a: &i64, out: &i8) -> i64

Convert BigNum to decimal string. Returns length written.

fn bn_to_i64(a: &i64) -> i64

Convert BigNum to i64 (truncates if too large).