/* Copyright libuv contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#include "uv.h"

#include "task.h"

#include <string.h>

static char scratch[256];

static int random_cb_called;

static void random_cb(uv_random_t* req, int status, void* buf, size_t buflen) {

  char zero[sizeof(scratch)];

  memset(zero, 0, sizeof(zero));

  ASSERT(0 == status);

  ASSERT(buf == (void*) scratch);

  if (random_cb_called == 0) {

    ASSERT(buflen == 0);

    ASSERT(0 == memcmp(scratch, zero, sizeof(zero)));

  } else {

    ASSERT(buflen == sizeof(scratch));

    /* Buy a lottery ticket if you manage to trip this assertion. */

    ASSERT(0 != memcmp(scratch, zero, sizeof(zero)));

  }

  random_cb_called++;

}

TEST_IMPL(random_async) {

  uv_random_t req;

  uv_loop_t* loop;

  loop = uv_default_loop();

  ASSERT(UV_EINVAL == uv_random(loop, &req, scratch, sizeof(scratch), -1,

                                random_cb));

  ASSERT(UV_E2BIG == uv_random(loop, &req, scratch, -1, -1, random_cb));

  ASSERT(0 == uv_random(loop, &req, scratch, 0, 0, random_cb));

  ASSERT(0 == random_cb_called);

  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));

  ASSERT(1 == random_cb_called);

  ASSERT(0 == uv_random(loop, &req, scratch, sizeof(scratch), 0, random_cb));

  ASSERT(1 == random_cb_called);

  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));

  ASSERT(2 == random_cb_called);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(random_sync) {

  char zero[256];

  char buf[256];

  ASSERT(UV_EINVAL == uv_random(NULL, NULL, buf, sizeof(buf), -1, NULL));

  ASSERT(UV_E2BIG == uv_random(NULL, NULL, buf, -1, -1, NULL));

  memset(buf, 0, sizeof(buf));

  ASSERT(0 == uv_random(NULL, NULL, buf, sizeof(buf), 0, NULL));

  /* Buy a lottery ticket if you manage to trip this assertion. */

  memset(zero, 0, sizeof(zero));

  ASSERT(0 != memcmp(buf, zero, sizeof(zero)));

  MAKE_VALGRIND_HAPPY();

  return 0;

}