/*
   Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include "my_config.h"
#include <gtest/gtest.h>

#include <my_global.h>
#include <my_pthread.h>
#include <my_bitmap.h>

namespace my_bitmap_unittest {

const uint MAX_TESTED_BITMAP_SIZE= 1024;

uint get_rand_bit(uint bitsize)
{
  return (rand() % bitsize);
}

bool test_set_get_clear_bit(MY_BITMAP *map, uint bitsize)
{
  uint i, test_bit;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  for (i=0; i < no_loops; i++)
  {
    test_bit= get_rand_bit(bitsize);
    bitmap_set_bit(map, test_bit);
    if (!bitmap_is_set(map, test_bit))
      goto error1;
    bitmap_clear_bit(map, test_bit);
    if (bitmap_is_set(map, test_bit))
      goto error2;
  }
  return false;
error1:
  ADD_FAILURE() << "Error in set bit  bit=" << test_bit;
  return true;
error2:
  ADD_FAILURE() << "Error in clear bit  bit=" << test_bit;
  return true;
}

bool test_flip_bit(MY_BITMAP *map, uint bitsize)
{
  uint i, test_bit;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  for (i=0; i < no_loops; i++)
  {
    test_bit= get_rand_bit(bitsize);
    bitmap_flip_bit(map, test_bit);
    if (!bitmap_is_set(map, test_bit))
      goto error1;
    bitmap_flip_bit(map, test_bit);
    if (bitmap_is_set(map, test_bit))
      goto error2;
  }
  return false;
error1:
  ADD_FAILURE() << "Error in flip bit 1  bit=" << test_bit;
  return true;
error2:
  ADD_FAILURE() << "Error in flip bit 2  bit=" << test_bit;
  return true;
}

bool test_get_all_bits(MY_BITMAP *map, uint bitsize)
{
  uint i;
  bitmap_set_all(map);
  if (!bitmap_is_set_all(map))
    goto error1;
  if (!bitmap_is_prefix(map, bitsize))
    goto error5;
  bitmap_clear_all(map);
  if (!bitmap_is_clear_all(map))
    goto error2;
  if (!bitmap_is_prefix(map, 0))
    goto error6;
  for (i=0; i<bitsize;i++)
    bitmap_set_bit(map, i);
  if (!bitmap_is_set_all(map))
    goto error3;
  for (i=0; i<bitsize;i++)
    bitmap_clear_bit(map, i);
  if (!bitmap_is_clear_all(map))
    goto error4;
  return false;
error1:
  ADD_FAILURE() << "Error in set_all";
  return true;
error2:
  ADD_FAILURE() << "Error in clear_all";
  return true;
error3:
  ADD_FAILURE() << "Error in bitmap_is_set_all";
  return true;
error4:
  ADD_FAILURE() << "Error in bitmap_is_clear_all";
  return true;
error5:
  ADD_FAILURE() << "Error in set_all through set_prefix";
  return true;
error6:
  ADD_FAILURE() << "Error in clear_all through set_prefix";
  return true;
}

bool test_compare_operators(MY_BITMAP *map, uint bitsize)
{
  uint i, j, test_bit1, test_bit2, test_bit3,test_bit4;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  MY_BITMAP map2_obj, map3_obj;
  MY_BITMAP *map2= &map2_obj, *map3= &map3_obj;
  my_bitmap_map map2buf[MAX_TESTED_BITMAP_SIZE];
  my_bitmap_map map3buf[MAX_TESTED_BITMAP_SIZE];
  bitmap_init(&map2_obj, map2buf, bitsize, false);
  bitmap_init(&map3_obj, map3buf, bitsize, false);
  bitmap_clear_all(map2);
  bitmap_clear_all(map3);
  for (i=0; i < no_loops; i++)
  {
    test_bit1=get_rand_bit(bitsize);
    bitmap_set_prefix(map, test_bit1);
    test_bit2=get_rand_bit(bitsize);
    bitmap_set_prefix(map2, test_bit2);
    bitmap_intersect(map, map2);
    test_bit3= test_bit2 < test_bit1 ? test_bit2 : test_bit1;
    bitmap_set_prefix(map3, test_bit3);
    if (!bitmap_cmp(map, map3))
      goto error1;
    bitmap_clear_all(map);
    bitmap_clear_all(map2);
    bitmap_clear_all(map3);
    test_bit1=get_rand_bit(bitsize);
    test_bit2=get_rand_bit(bitsize);
    test_bit3=get_rand_bit(bitsize);
    bitmap_set_prefix(map, test_bit1);
    bitmap_set_prefix(map2, test_bit2);
    test_bit3= test_bit2 > test_bit1 ? test_bit2 : test_bit1;
    bitmap_set_prefix(map3, test_bit3);
    bitmap_union(map, map2);
    if (!bitmap_cmp(map, map3))
      goto error2;
    bitmap_clear_all(map);
    bitmap_clear_all(map2);
    bitmap_clear_all(map3);
    test_bit1=get_rand_bit(bitsize);
    test_bit2=get_rand_bit(bitsize);
    test_bit3=get_rand_bit(bitsize);
    bitmap_set_prefix(map, test_bit1);
    bitmap_set_prefix(map2, test_bit2);
    bitmap_xor(map, map2);
    test_bit3= test_bit2 > test_bit1 ? test_bit2 : test_bit1;
    test_bit4= test_bit2 < test_bit1 ? test_bit2 : test_bit1;
    bitmap_set_prefix(map3, test_bit3);
    for (j=0; j < test_bit4; j++)
      bitmap_clear_bit(map3, j);
    if (!bitmap_cmp(map, map3))
      goto error3;
    bitmap_clear_all(map);
    bitmap_clear_all(map2);
    bitmap_clear_all(map3);
    test_bit1=get_rand_bit(bitsize);
    test_bit2=get_rand_bit(bitsize);
    test_bit3=get_rand_bit(bitsize);
    bitmap_set_prefix(map, test_bit1);
    bitmap_set_prefix(map2, test_bit2);
    bitmap_subtract(map, map2);
    if (test_bit2 < test_bit1)
    {
      bitmap_set_prefix(map3, test_bit1);
      for (j=0; j < test_bit2; j++)
        bitmap_clear_bit(map3, j);
    }
    if (!bitmap_cmp(map, map3))
      goto error4;
    bitmap_clear_all(map);
    bitmap_clear_all(map2);
    bitmap_clear_all(map3);
    test_bit1=get_rand_bit(bitsize);
    bitmap_set_prefix(map, test_bit1);
    bitmap_invert(map);
    bitmap_set_all(map3);
    for (j=0; j < test_bit1; j++)
      bitmap_clear_bit(map3, j);
    if (!bitmap_cmp(map, map3))
      goto error5;
    bitmap_clear_all(map);
    bitmap_clear_all(map3);
  }
  return false;
error1:
  ADD_FAILURE() << "intersect error  size1=" << test_bit1
                << ",size2=" << test_bit2;
  return true;
error2:
  ADD_FAILURE() << "union error  size1=" << test_bit1
                << ",size2=" << test_bit2;
  return true;
error3:
  ADD_FAILURE() << "xor error  size1=" << test_bit1
                << ",size2=" << test_bit2;
  return true;
error4:
  ADD_FAILURE() << "subtract error  size1=" << test_bit1
                << ",size2=" << test_bit2;
  return true;
error5:
  ADD_FAILURE() << "invert error  size=" << test_bit1;
  return true;
}

bool test_count_bits_set(MY_BITMAP *map, uint bitsize)
{
  uint i, bit_count=0, test_bit;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    if (!bitmap_is_set(map, test_bit))
    {
      bitmap_set_bit(map, test_bit);
      bit_count++;
    }
  }
  if (bit_count==0 && bitsize > 0)
    goto error1;
  if (bitmap_bits_set(map) != bit_count)
    goto error2;
  return false;
error1:
  ADD_FAILURE() << "No bits set";
  return true;
error2:
  ADD_FAILURE() << "Wrong count of bits set";
  return true;
}

bool test_get_first_bit(MY_BITMAP *map, uint bitsize)
{
  uint i, test_bit= 0;
  uint no_loops= bitsize > 128 ? 128 : bitsize;

  bitmap_set_all(map);
  for (i=0; i < bitsize; i++)
    bitmap_clear_bit(map, i);
  if (bitmap_get_first_set(map) != MY_BIT_NONE)
    goto error1;
  bitmap_clear_all(map);
  for (i=0; i < bitsize; i++)
    bitmap_set_bit(map, i);
  if (bitmap_get_first(map) != MY_BIT_NONE)
    goto error2;
  bitmap_clear_all(map);

  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    bitmap_set_bit(map, test_bit);
    if (bitmap_get_first_set(map) != test_bit)
      goto error1;
    bitmap_set_all(map);
    bitmap_clear_bit(map, test_bit);
    if (bitmap_get_first(map) != test_bit)
      goto error2;
    bitmap_clear_all(map);
  }
  return false;
error1:
  ADD_FAILURE() << "get_first_set error  prefix_size=" << test_bit;
  return true;
error2:
  ADD_FAILURE() << "get_first error  prefix_size=" << test_bit;
  return true;
}

bool test_set_next_bit(MY_BITMAP *map, uint bitsize)
{
  uint i, j, test_bit;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    for (j=0; j < test_bit; j++)
      bitmap_set_next(map);
    if (!bitmap_is_prefix(map, test_bit))
      goto error1;
    bitmap_clear_all(map);
  }
  return false;
error1:
  ADD_FAILURE() << "set_next error  prefix_size=" << test_bit;
  return true;
}

bool test_get_next_bit(MY_BITMAP *map, uint bitsize)
{
  uint i, bit_count=0, test_bit, next_count=0;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    if (!bitmap_is_set(map, test_bit))
    {
      bitmap_set_bit(map, test_bit);
      bit_count++;
    }
  }
  if (bit_count==0 && bitsize > 0)
    goto error1;
  if (bitmap_bits_set(map) != bit_count)
    goto error2;
  
  for (test_bit= bitmap_get_first_set(map);
       test_bit != MY_BIT_NONE;
       test_bit= bitmap_get_next_set(map, test_bit))
  {
    if (test_bit >= bitsize)
      goto error3;
    if (!bitmap_is_set(map, test_bit))
      goto error4;
    next_count++;
  }
  if (next_count != bit_count)
    goto error5;
  return false;
error1:
  ADD_FAILURE() << "No bits set";
  return true;
error2:
  ADD_FAILURE() << "Wrong count of bits set";
  return true;
error3:
  ADD_FAILURE() << "get_next_set out of range";
  return true;
error4:
  ADD_FAILURE() << "get_next_set bit not set";
  return true;
error5:
  ADD_FAILURE() << "Wrong count get_next_set";
  return true;
}

bool test_prefix(MY_BITMAP *map, uint bitsize)
{
  uint i, j, test_bit;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    bitmap_set_prefix(map, test_bit);
    if (!bitmap_is_prefix(map, test_bit))
      goto error1;
    bitmap_clear_all(map);
    for (j=0; j < test_bit; j++)
      bitmap_set_bit(map, j);
    if (!bitmap_is_prefix(map, test_bit))
      goto error2;
    bitmap_set_all(map);
    for (j=bitsize - 1; ~(j-test_bit); j--)
      bitmap_clear_bit(map, j);
    if (!bitmap_is_prefix(map, test_bit))
      goto error3;
    bitmap_clear_all(map);
  }
  for (i=0; i < bitsize; i++)
  {
    if (bitmap_is_prefix(map, i + 1))
      goto error4;
    bitmap_set_bit(map, i);
    if (!bitmap_is_prefix(map, i + 1))
      goto error5;
    test_bit=get_rand_bit(bitsize);
    bitmap_set_bit(map, test_bit);
    if (test_bit <= i && !bitmap_is_prefix(map, i + 1))
      goto error5;
    else if (test_bit > i)
    {
      if (bitmap_is_prefix(map, i + 1))
        goto error4;
      bitmap_clear_bit(map, test_bit);
    }
  }
  return false;
error1:
  ADD_FAILURE() << "prefix1 error  prefix_size=" << test_bit;
  return true;
error2:
  ADD_FAILURE() << "prefix2 error  prefix_size=" << test_bit;
  return true;
error3:
  ADD_FAILURE() << "prefix3 error  prefix_size=" << test_bit;
  return true;
error4:
  ADD_FAILURE() << "prefix4 error  i=" << i;
  return true;
error5:
  ADD_FAILURE() << "prefix5 error  i=" << i;
  return true;
}

bool test_compare(MY_BITMAP *map, uint bitsize)
{
  MY_BITMAP map2;
  my_bitmap_map map2buf[MAX_TESTED_BITMAP_SIZE];
  uint i, test_bit;
  uint no_loops= bitsize > 128 ? 128 : bitsize;
  bitmap_init(&map2, map2buf, bitsize, false);

  /* Test all 4 possible combinations of set/unset bits. */
  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    bitmap_clear_bit(map, test_bit);
    bitmap_clear_bit(&map2, test_bit);
    if (!bitmap_is_subset(map, &map2))
      goto error_is_subset;
    bitmap_set_bit(map, test_bit);
    if (bitmap_is_subset(map, &map2))
      goto error_is_subset;
    bitmap_set_bit(&map2, test_bit);
    if (!bitmap_is_subset(map, &map2))
      goto error_is_subset;
    bitmap_clear_bit(map, test_bit);
    if (!bitmap_is_subset(map, &map2))
      goto error_is_subset;
    /* Note that test_bit is not cleared i map2. */
  }
  bitmap_clear_all(map);
  bitmap_clear_all(&map2);
  /* Test all 4 possible combinations of set/unset bits. */
  for (i=0; i < no_loops; i++)
  {
    test_bit=get_rand_bit(bitsize);
    if (bitmap_is_overlapping(map, &map2))
      goto error_is_overlapping;
    bitmap_set_bit(map, test_bit);
    if (bitmap_is_overlapping(map, &map2))
      goto error_is_overlapping;
    bitmap_set_bit(&map2, test_bit);
    if (!bitmap_is_overlapping(map, &map2))
      goto error_is_overlapping;
    bitmap_clear_bit(map, test_bit);
    if (bitmap_is_overlapping(map, &map2))
      goto error_is_overlapping;
    bitmap_clear_bit(&map2, test_bit);
    /* Note that test_bit is not cleared i map2. */
  }
  return false;
error_is_subset:
  ADD_FAILURE() << "is_subset error";
  return true;
error_is_overlapping:
  ADD_FAILURE() << "is_overlapping error";
  return true;
}

bool test_intersect(MY_BITMAP *map, uint bitsize)
{
  uint bitsize2 = 1 + get_rand_bit(MAX_TESTED_BITMAP_SIZE - 1);
  MY_BITMAP map2;
  my_bitmap_map *map2buf= new my_bitmap_map[bitsize2];
  uint i, test_bit1, test_bit2, test_bit3;
  bitmap_init(&map2, map2buf, bitsize2, false);

  test_bit1= get_rand_bit(bitsize);
  test_bit2= get_rand_bit(bitsize);
  bitmap_set_bit(map, test_bit1);
  bitmap_set_bit(map, test_bit2);
  test_bit3= get_rand_bit(bitsize2);
  bitmap_set_bit(&map2, test_bit3);
  if (test_bit2 < bitsize2)
    bitmap_set_bit(&map2, test_bit2);

  bitmap_intersect(map, &map2);
  if (test_bit2 < bitsize2)
  {
    if (!bitmap_is_set(map, test_bit2))
      goto error;
    bitmap_clear_bit(map, test_bit2);
  }
  if (test_bit1 == test_bit3)
  {
    if (!bitmap_is_set(map, test_bit1))
      goto error;
    bitmap_clear_bit(map, test_bit1);
  }
  if (!bitmap_is_clear_all(map))
    goto error;

  bitmap_set_all(map);
  bitmap_set_all(&map2);
  for (i=0; i < bitsize2; i++)
    bitmap_clear_bit(&map2, i);
  bitmap_intersect(map, &map2);
  if (!bitmap_is_clear_all(map))
    goto error;
  delete[] map2buf;
  return false;
error:
  ADD_FAILURE() << "intersect error  bit1=" << test_bit1
                << ",bit2=" << test_bit2 << ",bit3=" << test_bit3;
  return true;
}

#if defined(GTEST_HAS_PARAM_TEST)

class BitMapTest : public ::testing::TestWithParam<uint>
{
protected:
  virtual void SetUp()
  {
    bitsize= GetParam();
    ASSERT_FALSE(bitmap_init(&map, buf, bitsize, false));
    bitmap_clear_all(&map);
  }

  MY_BITMAP map;
  my_bitmap_map buf[MAX_TESTED_BITMAP_SIZE];
  uint bitsize;
};

const uint test_values[]=
{
   1,  2,  3,  4,  5,  6,  7,  8,  9, 10,
  11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
  21, 22, 23, 24, 25, 26, 27, 28, 29, 30,
  31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
  2*32U - 1, 2*32U, 2*32U + 1,
  3*32U - 1, 3*32U, 3*32U + 1,
  4*32U - 1, 4*32U, 4*32U + 1,
  MAX_TESTED_BITMAP_SIZE
};

INSTANTIATE_TEST_CASE_P(Foo, BitMapTest,
                        ::testing::ValuesIn(test_values));

TEST_P(BitMapTest, TestSetGetClearBit)
{
  EXPECT_FALSE(test_set_get_clear_bit(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestFlipBit)
{
  EXPECT_FALSE(test_flip_bit(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestGetAllBits)
{
  EXPECT_FALSE(test_get_all_bits(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestCompareOperators)
{
  EXPECT_FALSE(test_compare_operators(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestCountBitsSet)
{
  EXPECT_FALSE(test_count_bits_set(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestGetFirstBit)
{
  EXPECT_FALSE(test_get_first_bit(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestSetNextBit)
{
  EXPECT_FALSE(test_set_next_bit(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestGetNextBit)
{
  EXPECT_FALSE(test_get_next_bit(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestPrefix)
{
  EXPECT_FALSE(test_prefix(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestCompare)
{
  EXPECT_FALSE(test_compare(&map, bitsize)) << "bitsize=" << bitsize;
}

TEST_P(BitMapTest, TestIntersect)
{
  EXPECT_FALSE(test_intersect(&map, bitsize)) << "bitsize=" << bitsize;
}

#endif

}
