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Serge Zaitsev zserge

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View nanogit.go
package main
import (
zserge /
Last active January 25, 2023 11:28
Minimal ray tracer for leaning purposes
#include <array>
#include <cmath>
#include <fstream>
#include <iostream>
#include <vector>
struct Vec {
float x, y, z;
Vec(float vx, float vy, float vz) : x(vx), y(vy), z(vz) {}
Vec operator+(Vec vec) { return {x + vec.x, y + vec.y, z + vec.z}; }
zserge / example.html
Last active April 2, 2021 21:49
This is the smallest possible CSS-in-JS that supports all CSS rules, media queries, keyframes and generates unique class names for each CSS block. Can be used with React or with any other framework.
View example.html
<script type="module">
import { css } from './zercss.js';
// Global styles
&{} /* This would be a global CSS */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { max-width: 40rem; padding: 2rem; margin: auto; }
View editor.html
<!DOCTYPE html>
.editor { font-family: 'Roboto Mono', monospace; font-size: 12px; outline: none; overflow-y: auto; padding-left: 48px; counter-reset: line; }
.editor div { display: block; position: relative; white-space: pre-wrap; }
.editor div::before { content: counter(line); counter-increment: line; position: absolute; right: calc(100% + 16px); opacity: 0.5; }
zserge /
Last active November 22, 2021 11:16
A tiny JVM to run a single method from a single class
public class Add {
public static int add(int a, int b) {
return a + b;
View container.c
#define _GNU_SOURCE
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
zserge / guest.S
Created May 10, 2020 08:41
A tiny KVM host to run a 16-bit real mode "kernel"
View guest.S
# A tiny 16-bit guest "kernel" that infinitely prints an incremented number to the debug port
# Build it:
# as -32 guest.S -o guest.o
# ld -m elf_i386 --oformat binary -N -e _start -Ttext 0x10000 -o guest guest.o
.globl _start
zserge / kvm-host.c
Last active November 21, 2022 18:47
Tiny KVM host to at least partially run Linux kernel
View kvm-host.c
#define _GNU_SOURCE
#include <asm/bootparam.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
zserge / act.js
Last active October 31, 2019 21:18
View act.js
const h = (e, p = {}, ...c) => ({e, p, c: [].concat(...c)});
const render = (vlist, dom) => {
vlist = [].concat(vlist);
vlist.forEach((v, i) => {
let n = dom.childNodes[i];
let s = (v.s = (n ? n.s : v.s) || {});
while (typeof v.e === 'function') {
v = v.e(v.p, s, u => Object.assign(s, u) && render(vlist, dom));
v.s = s;
View .zshrc
autoload -U compinit colors vcs_info