Zig 0.17.0-dev (Split by item)

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rightEncode

Right-encode: encodes a number as bytes with length suffix (no allocation)

kangarootwelve.rightEncode

fn rightEncode(x: usize) RightEncoded

File

lib/std/crypto/kangarootwelve.zig:137

Code

fn rightEncode(x: usize) RightEncoded {
    var result: RightEncoded = undefined;

    if (x == 0) {
        result.bytes[0] = 0;
        result.len = 1;
        return result;
    }

    var temp: [9]u8 = undefined;
    var len: usize = 0;
    var val = x;

    while (val > 0) : (val /= 256) {
        temp[len] = @intCast(val % 256);
        len += 1;
    }

    // Reverse bytes (MSB first)
    for (0..len) |i| {
        result.bytes[i] = temp[len - 1 - i];
    }
    result.bytes[len] = @intCast(len);
    result.len = @intCast(len + 1);

    return result;
}