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/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Bitmap.c unit-tests.
*
* Copyright (C) 2019, Red Hat, Inc.
*
* Author: Peter Xu <peterx@redhat.com>
*/
#include "qemu/osdep.h"
#include "qemu/bitmap.h"
#define BMAP_SIZE 1024
static void check_bitmap_copy_with_offset(void)
{
unsigned long *bmap1, *bmap2, *bmap3, total;
bmap1 = bitmap_new(BMAP_SIZE);
bmap2 = bitmap_new(BMAP_SIZE);
bmap3 = bitmap_new(BMAP_SIZE);
bmap1[0] = g_test_rand_int();
bmap1[1] = g_test_rand_int();
bmap1[2] = g_test_rand_int();
bmap1[3] = g_test_rand_int();
total = BITS_PER_LONG * 4;
/* Shift 115 bits into bmap2 */
bitmap_copy_with_dst_offset(bmap2, bmap1, 115, total);
/* Shift another 85 bits into bmap3 */
bitmap_copy_with_dst_offset(bmap3, bmap2, 85, total + 115);
/* Shift back 200 bits back */
bitmap_copy_with_src_offset(bmap2, bmap3, 200, total);
g_assert_cmpmem(bmap1, total / BITS_PER_LONG,
bmap2, total / BITS_PER_LONG);
bitmap_clear(bmap1, 0, BMAP_SIZE);
/* Set bits in bmap1 are 100-245 */
bitmap_set(bmap1, 100, 145);
/* Set bits in bmap2 are 60-205 */
bitmap_copy_with_src_offset(bmap2, bmap1, 40, 250);
g_assert_cmpint(find_first_bit(bmap2, 60), ==, 60);
g_assert_cmpint(find_next_zero_bit(bmap2, 205, 60), ==, 205);
g_assert(test_bit(205, bmap2) == 0);
/* Set bits in bmap3 are 135-280 */
bitmap_copy_with_dst_offset(bmap3, bmap1, 35, 250);
g_assert_cmpint(find_first_bit(bmap3, 135), ==, 135);
g_assert_cmpint(find_next_zero_bit(bmap3, 280, 135), ==, 280);
g_assert(test_bit(280, bmap3) == 0);
g_free(bmap1);
g_free(bmap2);
g_free(bmap3);
}
typedef void (*bmap_set_func)(unsigned long *map, long i, long len);
static void bitmap_set_case(bmap_set_func set_func)
{
unsigned long *bmap;
int offset;
bmap = bitmap_new(BMAP_SIZE);
/* Set one bit at offset in second word */
for (offset = 0; offset <= BITS_PER_LONG; offset++) {
bitmap_clear(bmap, 0, BMAP_SIZE);
set_func(bmap, BITS_PER_LONG + offset, 1);
g_assert_cmpint(find_first_bit(bmap, 2 * BITS_PER_LONG),
==, BITS_PER_LONG + offset);
g_assert_cmpint(find_next_zero_bit(bmap,
3 * BITS_PER_LONG,
BITS_PER_LONG + offset),
==, BITS_PER_LONG + offset + 1);
}
/* Both Aligned, set bits [BITS_PER_LONG, 3*BITS_PER_LONG] */
set_func(bmap, BITS_PER_LONG, 2 * BITS_PER_LONG);
g_assert_cmpuint(bmap[1], ==, -1ul);
g_assert_cmpuint(bmap[2], ==, -1ul);
g_assert_cmpint(find_first_bit(bmap, BITS_PER_LONG), ==, BITS_PER_LONG);
g_assert_cmpint(find_next_zero_bit(bmap, 3 * BITS_PER_LONG, BITS_PER_LONG),
==, 3 * BITS_PER_LONG);
for (offset = 0; offset <= BITS_PER_LONG; offset++) {
bitmap_clear(bmap, 0, BMAP_SIZE);
/* End Aligned, set bits [BITS_PER_LONG - offset, 3*BITS_PER_LONG] */
set_func(bmap, BITS_PER_LONG - offset, 2 * BITS_PER_LONG + offset);
g_assert_cmpuint(bmap[1], ==, -1ul);
g_assert_cmpuint(bmap[2], ==, -1ul);
g_assert_cmpint(find_first_bit(bmap, BITS_PER_LONG),
==, BITS_PER_LONG - offset);
g_assert_cmpint(find_next_zero_bit(bmap,
3 * BITS_PER_LONG,
BITS_PER_LONG - offset),
==, 3 * BITS_PER_LONG);
}
for (offset = 0; offset <= BITS_PER_LONG; offset++) {
bitmap_clear(bmap, 0, BMAP_SIZE);
/* Start Aligned, set bits [BITS_PER_LONG, 3*BITS_PER_LONG + offset] */
set_func(bmap, BITS_PER_LONG, 2 * BITS_PER_LONG + offset);
g_assert_cmpuint(bmap[1], ==, -1ul);
g_assert_cmpuint(bmap[2], ==, -1ul);
g_assert_cmpint(find_first_bit(bmap, BITS_PER_LONG),
==, BITS_PER_LONG);
g_assert_cmpint(find_next_zero_bit(bmap,
3 * BITS_PER_LONG + offset,
BITS_PER_LONG),
==, 3 * BITS_PER_LONG + offset);
}
g_free(bmap);
}
static void check_bitmap_set(void)
{
bitmap_set_case(bitmap_set);
bitmap_set_case(bitmap_set_atomic);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
g_test_add_func("/bitmap/bitmap_copy_with_offset",
check_bitmap_copy_with_offset);
g_test_add_func("/bitmap/bitmap_set",
check_bitmap_set);
g_test_run();
return 0;
}
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