/* SPDX-License-Identifier: LGPL-2.1-only */

/* Copyright (C) 2020 Gediminas Jakutis */

#include <unistd.h>
#include <stddef.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "datagen.h"
#include "defs.h"

static struct entry_l buf;

struct entry_l *gen_get_array(struct stream * const in)
{
	struct entry_l *ret;
	int errn;

	if (read(in->fd, &buf.val, sizeof(buf.val)) == sizeof(buf.val)) {
		ret = &buf;
	} else {
		errn = errno;
		ret = NULL;
		rin_err("error reading /dev/urandom: %s", strerror(errn));
	}

	return ret;
}

struct entry_l *gen_get_list(struct stream * const in)
{
	struct entry_l *ret;

	try_s((ret = gen_get_array(in)), err);
	ret->next = 0;

err:
	return ret;
}