notcancername’s gists

notcancername / bit_probabilities.zig

Last active November 13, 2025 07:32

Reads a list of newline-delimited 64-bit unsigned integer strings from stdin and outputs the bitwise probability as well as the Shannon entropy.

	const std = @import("std");

	pub const Result = struct {
	total: u64 = 0,
	counts: [64]u64 = @splat(0),

	/// atomic
	pub fn add(to: Result, from: const Result) void {
	_ = @atomicRmw(u64, &to.total, .Add, from.total, .monotonic);
	for (&to.counts, &from.counts) \|*d, s\| {

notcancername / bcachefs_graph.zig

Created July 18, 2025 05:42

	pub const std = @import("std");

	pub const dvui = @import("dvui");
	const Backend = dvui.backend;

	pub const tardy = @import("tardy");
	const Tardy = tardy.Tardy(.io_uring);
	const Runtime = tardy.Runtime;
	const Socket = tardy.Socket;
	const Timer = tardy.Timer;

notcancername / floyd_steinberg.zig

Created July 5, 2025 03:28

floyd steinberg dithering

	const std = @import("std");
	const pnmdec = @import("pnmdec.zig");

	pub fn quantFloydSteinberg(
	rows: usize,
	cols: usize,
	out: [*]u1,
	in: [*]u8,
	) void {
	for (0..rows) \|row_cursor\| {

notcancername / unescape_repr.zig

Last active April 16, 2025 11:50

	// SPDX-License-Identifier: MPL-2.0

	fn unescapeSlicePythonRepr(
	out: []u8,
	in: []const u8,
	/// Never do output bound checks. Unsafe, use this if and only if
	/// you know the string will fit (length at least input length -
	/// 2)
	comptime skip_bounds_check: bool,
	) !usize {

notcancername / indexing_pool.zig

Last active February 5, 2025 19:37

A pool returning indices to be used as pointer substitutes. A limited number of items is kept in a free list to re-use.

	const std = @import("std");

	pub const IndexingPoolOptions = struct {
	/// The maximum number of items the pool can hold.
	max_items: usize = std.math.maxInt(u32),
	/// The number of item indices to be kept for re-use. If this is
	/// too low, items will leak until the pool is deinitialized.
	free_list_len: usize = 64,
	log: type = std.log.scoped(.indexing_pool),
	};

notcancername / renderdoc_list_time.py

Last active December 23, 2024 02:36

notcancername / spd.zig

Created November 24, 2024 16:46

change cpu speed linux zig

	const std = @import("std");

	pub fn put(b: []u8, a: []const u8) usize {
	@memcpy(b[0..a.len], a);
	return a.len;
	}

	pub fn main() u8 {
	var ally = std.heap.ArenaAllocator.init(std.heap.page_allocator);
	defer ally.deinit();

notcancername / sus.zig

Created November 21, 2024 12:24

risc-v emulator thing

	const std = @import("std");
	const assert = std.debug.assert;
	const Log2Int = std.math.Log2Int;

	comptime {
	std.testing.refAllDeclsRecursive(@This());
	}

	const Register = extern union {
	signed: i32,

notcancername / python-on-region.el

Created November 20, 2024 14:36

elisp python-on-region

	(defvar
	python-on-region-template
	"#! /usr/bin/env python3\nimport sys\nfor line in sys.stdin:\n sys.stdout.write(line$$)\n"
	"The template to use for python-on-region. $$ indicates the point.")

	(defun python-on-region--run ()
	(interactive)
	(save-buffer)
	(delete-window)
	(switch-to-buffer python-on-region--buffer)

notcancername / gist:972e99157ad42354ebcd9b9614c029f1

Created October 31, 2024 21:33

	function memfrob(str) {
	var out = "";
	for (var i = 0; i < str.length; i++) {
	out += String.fromCharCode(str.charCodeAt(i) ^ 42);
	}
	return out;
	}

	function apply(id, frobbed) {
	document.getElementById(id).href = memfrob(atob(frobbed));

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