#include "xwrap.h"

#include <inttypes.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>

static int qsort_cb (const void* a, const void* b) {
	int32_t aa = *(int32_t*)a;
	int32_t bb = *(int32_t*)b;
	if (aa > bb) {
		return 1;
	} else if (aa < bb) {
		return -1;
	} else {
		return 0;
	}
}

static void print_seq (FILE* fp, int32_t* s, long len) {
	for (int i = 0; i < len; i++) {
		if (i) {
			putc (' ', fp);
		}
		fprintf (fp, "%" PRId32, s[i]);
	}
	putc ('\n', fp);
}

int main (int argc, char* argv[]) {
	if (argc < 2) {
		fprintf (stderr, "Usage: %s length\n", argv[0]);
		return 1;
	}

	long len;
	if (xatol (argv[1], &len) < 0) {
		fprintf (stderr, "%s: %s is not a valid length\n", argv[0], argv[1]);
		return 2;
	}
	if (len <= 0) {
		fprintf (stderr, "%s: %s is not a positive number\n", argv[0], argv[1]);
		return 2;
	}

	srandom (time (NULL) + getpid () + getppid () + getuid ());

	int32_t* s = xmalloc (sizeof (int32_t) * len);
	for (long i = 0; i < len; i++) {
		s[i] = random ();
	}
	printf ("%ld\n", len);
	print_seq (stdout, s, len);

	qsort (s, len, sizeof (int32_t), qsort_cb);
	print_seq (stderr, s, len);

	free (s);
	
	return 0;
}