Christopher Wellons skeeto

uint64_t dualmix128(uint64_t s[2])
{
    uint64_t m = s[0] + s[1];
    s[0] = m + (s[0]<<26 | s[0]>>38);

uint64_t dualmix128(uint64_t s[2])
{
    uint64_t m = s[0] + s[1];
 s[0] = m + (s[0]&lt;&lt;26 | s[0]&gt;&gt;38);

	// Single consumer, single producer circular buffer using Win32 SRW
	// Ref: https://github.com/vibhav950/cbuf
	// Ref: https://old.reddit.com/r/C_Programming/comments/1jwnlrf
	// Ref: https://nullprogram.com/blog/2024/10/03/
	#include <stddef.h>
	#include <stdint.h>
	#include <string.h>

	typedef uint8_t u8;
	typedef int32_t b32;

	!profile claude
	!user
	Please give me an example of using WASI `path_open` to open a file for writing. In particular, I don't know where to get the `dirfd` parameter.

	!assistant

	# Example of using WASI `path_open` to open a file for writing

	The WASI `path_open` function requires a directory file descriptor (`dirfd`) as its first parameter because WASI uses a capability-based security model. Here's how to use it:

	// Robust Lock: if a "thread" exits while holding a lock, it is unlocked
	// linux $ cc -pthread example.c
	// w64dk $ cc example.c -lntdll
	// Ref: https://old.reddit.com/r/C_Programming/comments/1jd82ux
	// Ref: https://github.com/cozis/timestamp_lock
	// This is free and unencumbered software released into the public domain.
	#include <assert.h>
	#include <stddef.h>
	#include <stdint.h>
	#include <stdio.h>

	// https://old.reddit.com/r/C_Programming/comments/1iljkn2
	// https://github.com/jamesnolanverran/dmap
	#include "dmap.c"
	#include <string.h>

	#define KEYLEN 8
	#define RUNS 10
	#define KEYS 1000000

	static void encode(char *key, int x)

	// 1. Input:
	// A number N, representing the size of the square board grid. N rows of
	// N characters each, where each character is either R (red) or A (blue).
	//
	// 2. Objective:
	// Rearrange the rows of the board to maximize the area of the largest
	// contiguous rectangular zone for each color (R for The Famous, A for
	// The Warriors).
	//
	// Determine the winning team based on the larger rectangular area of

	// Examples of quick hash tables and dynamic arrays in C
	// https://nullprogram.com/blog/2025/01/19/
	// This is free and unencumbered software released into the public domain.
	#include <assert.h>
	#include <stdarg.h>
	#include <stddef.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>


	Question 2: Steganography using 4-bit LSB algorithm
	Scope: File Processing, Pointers, Dynamic Memory Allocation (No arrays)
	File to use: stego_lsb.c

	Preliminary:

	This question should be solved using dynamic memory allocation along with
	pointers. Any submitted work which includes an array will be given
	automatically a zero mark. To view pgm files, you can use the “Irfan View”