skeeto

// Advent of Code 2025 Day 9
// $ cc -o aoc2509 aoc2509.c
// $ ./aoc2509 <input.txt
#include <stddef.h>
#include <stdint.h>

#define S(s)            (Str){s, sizeof(s)-1}
#define affirm(c)       while (!(c)) unreachable()
#define new(a, n, t)    (t *)alloc(a, n, sizeof(t), _Alignof(t))

skeeto

// This is free and unencumbered software released into the public domain.
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#define lenof(a)        (ptrdiff_t)(sizeof(a) / sizeof(*(a)))
#define S(s)            (Str){s, lenof(s)-1}
#define new(a, n, t)    (t *)alloc(a, n, sizeof(t), _Alignof(t))

skeeto

// $ cc -o parser parser.c
// $ ./parser <schema.json
// Ref: https://old.reddit.com/r/C_Programming/comments/1q0c2j7
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#define lenof(a)        (ptrdiff_t)(sizeof(a) / sizeof(*(a)))

skeeto

// Basic template engine
// $ cc -o template template.c
// $ printf '<title>{{title}}</title>\nHello, <b>{{name}}</b>!\n' >index.html
// $ ./template <index.html title='Example Page' name=skeeto
// Ref: https://old.reddit.com/r/C_Programming/comments/1pypl5t
#include <stdio.h>
#include <string.h>

int main(int argc, char **argv)
{

skeeto

// Ref: https://old.reddit.com/r/C_Programming/comments/1pxat1v
#include <assert.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

#define new(a, n, t)    (t *)alloc(a, n, sizeof(t), _Alignof(t))

typedef struct Dtor Dtor;

skeeto

// $ eval cc -g3 -o demo demo.c $(pkg-config --cflags --libs sdl2)
// Ref: https://old.reddit.com/r/C_Programming/comments/1prwizy
// Ref: https://github.com/Avery-Personal/Jubi
#define JUBI_IMPLEMENTATION
#include "Jubi.h"
#include "SDL.h"

static Sint32 randn(Uint64 *s, Sint32 lo, Sint32 hi)
{
    *s = *s*0x3243f6a8885a308d + 1;

skeeto

// https://old.reddit.com/r/C_Programming/comments/1pr881z/
// $ cc -std=gnu23 -O -o baseline baseline.c
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

skeeto

// https://old.reddit.com/r/C_Programming/comments/1pnh9fq
#include <assert.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define S(s)            (Str){s, sizeof(s)-1}
#define new(a, n, t)    (t *)alloc(a, n, sizeof(t), _Alignof(t))

skeeto

	.section .exebuf,"bwx"
	.globl exebuf
exebuf:	.space 1<<21

skeeto

	.section .exebuf,"bwx"
	.globl exebuf
exebuf:	.space 1<<12