os161-assignments/kern/test/arraytest.c

/*
 * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
 *	The President and Fellows of Harvard College.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <types.h>
#include <lib.h>
#include <array.h>
#include <test.h>

#define TESTSIZE 73
#define BIGTESTSIZE 3000 /* more than one page of pointers */
#define NTH(i) ((void *)(0xb007 + 3 * (i)))

static void testa(struct array *a) {
  int testarray[TESTSIZE];
  int i, j, n, r, *p;

  for (i = 0; i < TESTSIZE; i++) {
    testarray[i] = i;
  }

  n = array_num(a);
  KASSERT(n == 0);

  for (i = 0; i < TESTSIZE; i++) {
    r = array_add(a, &testarray[i], NULL);
    KASSERT(r == 0);
    n = array_num(a);
    KASSERT(n == i + 1);
  }
  n = array_num(a);
  KASSERT(n == TESTSIZE);

  for (i = 0; i < TESTSIZE; i++) {
    p = array_get(a, i);
    KASSERT(*p == i);
  }
  n = array_num(a);
  KASSERT(n == TESTSIZE);

  for (j = 0; j < TESTSIZE * 4; j++) {
    i = random() % TESTSIZE;
    p = array_get(a, i);
    KASSERT(*p == i);
  }
  n = array_num(a);
  KASSERT(n == TESTSIZE);

  for (i = 0; i < TESTSIZE; i++) {
    array_set(a, i, &testarray[TESTSIZE - i - 1]);
  }

  for (i = 0; i < TESTSIZE; i++) {
    p = array_get(a, i);
    KASSERT(*p == TESTSIZE - i - 1);
  }

  r = array_setsize(a, TESTSIZE / 2);
  KASSERT(r == 0);

  for (i = 0; i < TESTSIZE / 2; i++) {
    p = array_get(a, i);
    KASSERT(*p == TESTSIZE - i - 1);
  }

  array_remove(a, 1);

  for (i = 1; i < TESTSIZE / 2 - 1; i++) {
    p = array_get(a, i);
    KASSERT(*p == TESTSIZE - i - 2);
  }
  p = array_get(a, 0);
  KASSERT(*p == TESTSIZE - 1);

  array_setsize(a, 2);
  p = array_get(a, 0);
  KASSERT(*p == TESTSIZE - 1);
  p = array_get(a, 1);
  KASSERT(*p == TESTSIZE - 3);

  array_set(a, 1, NULL);
  array_setsize(a, 2);
  p = array_get(a, 0);
  KASSERT(*p == TESTSIZE - 1);
  p = array_get(a, 1);
  KASSERT(p == NULL);

  array_setsize(a, TESTSIZE * 10);
  p = array_get(a, 0);
  KASSERT(*p == TESTSIZE - 1);
  p = array_get(a, 1);
  KASSERT(p == NULL);
}

int arraytest(int nargs, char **args) {
  struct array *a;

  (void)nargs;
  (void)args;

  kprintf("Beginning array test...\n");
  a = array_create();
  KASSERT(a != NULL);

  testa(a);

  array_setsize(a, 0);

  testa(a);

  array_setsize(a, 0);
  array_destroy(a);

  kprintf("Array test complete\n");
  return 0;
}

int arraytest2(int nargs, char **args) {
  struct array *a;
  void *p;
  unsigned i, x;
  int result;

  (void)nargs;
  (void)args;

  /* Silence warning with gcc 4.8 -Og (but not -O2) */
  x = 0;

  kprintf("Beginning large array test...\n");
  a = array_create();
  KASSERT(a != NULL);

  /* 1. Fill it one at a time. */
  p = (void *)0xc0ffee;
  for (i = 0; i < BIGTESTSIZE; i++) {
    result = array_add(a, p, &x);
    KASSERT(result == 0);
    KASSERT(x == i);
  }
  KASSERT(array_num(a) == BIGTESTSIZE);

  /* 2. Check the contents */
  for (i = 0; i < BIGTESTSIZE; i++) {
    KASSERT(array_get(a, i) == p);
  }

  /* 3. Clear it */
  result = array_setsize(a, 0);
  KASSERT(result == 0);

  /* 4. Set the size and initialize with array_set */
  result = array_setsize(a, BIGTESTSIZE);
  KASSERT(result == 0);
  for (i = 0; i < BIGTESTSIZE; i++) {
    array_set(a, i, NTH(i));
  }

  /* 5. Check the contents again */
  for (i = 0; i < BIGTESTSIZE; i++) {
    KASSERT(array_get(a, i) == NTH(i));
  }

  /* 6. Zot an entry and check the contents */
  array_remove(a, 1);
  KASSERT(array_get(a, 0) == NTH(0));
  KASSERT(array_num(a) == BIGTESTSIZE - 1);
  for (i = 1; i < BIGTESTSIZE - 1; i++) {
    KASSERT(array_get(a, i) == NTH(i + 1));
  }

  /* 7. Double the size and check the preexisting contents */
  result = array_setsize(a, BIGTESTSIZE * 2);
  KASSERT(result == 0);
  KASSERT(array_get(a, 0) == NTH(0));
  for (i = 1; i < BIGTESTSIZE - 1; i++) {
    KASSERT(array_get(a, i) == NTH(i + 1));
  }

  /* done */
  result = array_setsize(a, 0);
  KASSERT(result == 0);
  array_destroy(a);

  kprintf("Done.\n");

  return 0;
}