#include "config.h"
#include <stdio.h>
#include <string.h>

/**
 * crypto/siphash24 - implementation of SipHash-2-4.
 *
 * SipHash was designed as a mitigation to hash-flooding DoS
 * attacks. It is now used in the hash tables implementation of
 * Python, Ruby, Perl 5, etc.
 *
 * SipHash was designed by Jean-Philippe Aumasson and Daniel J. Bernstein. 
 *
 * License: CC0
 * Maintainer: Rusty Russell <rusty@rustcorp.com.au>
 *
 * Example:
 * // Dumb example to print siphash of words, and all strung together.
 * #include <ccan/crypto/siphash24/siphash24.h>
 * #include <stdio.h>
 * #include <stdlib.h>
 * #include <string.h>
 * #include <inttypes.h>
 *
 * int main(int argc, char *argv[])
 * {
 *	struct siphash_seed seed;
 *	struct siphash24_ctx ctx;
 *	int i;
 *
 *	if (argc < 3) {
 *		fprintf(stderr, "Need at least seed1 and seed2 arguments");
 *		exit(1);
 *	}
 *
 *	seed.u.u64[0] = atoi(argv[1]);
 *	seed.u.u64[1] = atoi(argv[2]);
 *	siphash24_init(&ctx, &seed);
 *	for (i = 3; i < argc; i++) {
 *		printf("Hash of '%s' = %"PRIu64,
 *			argv[i], siphash24(&seed, argv[i], strlen(argv[i])));
 *		siphash24_update(&ctx, argv[i], strlen(argv[i]));
 *	}
 *	printf("Hash of concatenated args = %"PRIu64, siphash24_done(&ctx));
 *	return 0;
 * }
 */
int main(int argc, char *argv[])
{
	/* Expect exactly one argument */
	if (argc != 2)
		return 1;

	if (strcmp(argv[1], "depends") == 0) {
		printf("ccan/endian\n");
		return 0;
	}

	return 1;
}