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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. Private Function

random

Private Function
std.treap.Treap.Prng.random
fn random(self: *Prng, seed: usize) usize

Params

  • self: *Prng
  • seed: usize

File

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            fn random(self: *Prng, seed: usize) usize {
                // Lazily seed the prng state
                if (self.xorshift == 0) {
                    self.xorshift = seed;
                }

                // Since we're using usize, decide the shifts by the integer's bit width.
                const shifts = switch (@bitSizeOf(usize)) {
                    64 => .{ 13, 7, 17 },
                    32 => .{ 13, 17, 5 },
                    16 => .{ 7, 9, 8 },
                    else => @compileError("platform not supported"),
                };

                self.xorshift ^= self.xorshift >> shifts[0];
                self.xorshift ^= self.xorshift << shifts[1];
                self.xorshift ^= self.xorshift >> shifts[2];

                assert(self.xorshift != 0);
                return self.xorshift;
            }