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This is an example of documentation generated by ZigDoc, an alternative to Zig's built-in Auto Doc feature. See also examples in other modes/formats. The project being documented here (as the example) is the Zig standard library. Public Function

bitAnd

Public Function
std.math.big.int.Mutable.bitAnd
pub fn bitAnd(r: *Mutable, a: Const, b: Const) void

r = a & b under 2s complement semantics. r may alias with a or b.

Asserts that r has enough limbs to store the result. If only a is positive, the upper bound is a.limbs.len. If only b is positive, the upper bound is b.limbs.len. If a and b are positive, the upper bound is @min(a.limbs.len, b.limbs.len). If a and b are negative, the upper bound is @max(a.limbs.len, b.limbs.len) + 1.

Params

File

math/big/int.zig:1469
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    pub fn bitAnd(r: *Mutable, a: Const, b: Const) void {
        // Trivial cases, llsignedand does not support zero.
        if (a.eqlZero()) {
            r.copy(a);
            return;
        } else if (b.eqlZero()) {
            r.copy(b);
            return;
        }

        if (a.limbs.len >= b.limbs.len) {
            r.positive = llsignedand(r.limbs, a.limbs, a.positive, b.limbs, b.positive);
            r.normalize(if (b.positive) b.limbs.len else if (a.positive) a.limbs.len else a.limbs.len + 1);
        } else {
            r.positive = llsignedand(r.limbs, b.limbs, b.positive, a.limbs, a.positive);
            r.normalize(if (a.positive) a.limbs.len else if (b.positive) b.limbs.len else b.limbs.len + 1);
        }
    }