int main()
{
int size;
mydisk_init("diskfile", MAX_BLOCKS, 0);
init_cache(CACHED_BLOCKS);
/* Test case 1: read/write block */
size = BLOCK_SIZE;
memset(buffer, 0, size);
strcpy(buffer, "hello world\n");
mydisk_write_block(0, buffer);
memset(buffer2, 0, size);
mydisk_read_block(0, buffer2);
check_test(memcmp(buffer2, "hello world\n", 13));
/* Test case 2: basic read/write */
memset(buffer, 0, size);
mydisk_read(0, 13, buffer);
check_test(memcmp(buffer, "hello world\n", 13));
/* Test case 3: read in the middle */
memset(buffer, 0, BLOCK_SIZE);
mydisk_read(8, 5, buffer);
check_test(memcmp(buffer, "rld\n", 5));
/* Test case 4: read/write across blocks */
size = BLOCK_SIZE;
rand_str(buffer, size);
mydisk_write(144, size, buffer);
memset(buffer2, 0, size);
mydisk_read(144, size, buffer2);
check_test(memcmp(buffer, buffer2, size));
/* Test case 5: large read/write */
size = BLOCK_SIZE * (MAX_BLOCKS - 1);
rand_str(buffer, size);
mydisk_write(276, size, buffer);
mydisk_read(276, size, buffer2);
check_test(memcmp(buffer, buffer2, size));
/* Test case 6~9: read/write exception */
check_test(!mydisk_read(-1, 0, buffer));
check_test(!mydisk_read(0, -10, buffer));
check_test(!mydisk_read(100, BLOCK_SIZE * MAX_BLOCKS, buffer));
check_test(mydisk_write(0, 0, buffer));
check_test(stress_test());
check_test(stress_test2());
close_cache();
mydisk_close();
return 0;
}
int stress_test2()
{
int start, end, tmp, size;
int i;
for (i = 0; i < 10000; ++i) {
start = rand() % (MAX_BLOCKS * BLOCK_SIZE);
end = rand() % (MAX_BLOCKS * BLOCK_SIZE);
if (start > end) {
tmp = start;
start = end;
end = tmp;
}
size = end - start;
rand_str(buffer, size);
mydisk_write(start, size, buffer);
mydisk_read(start, size, buffer2);
if (memcmp(buffer, buffer2, size)) {
return 1;
}
}
return 0;
}
int sfs_write_block(void *buf, blkid bid)
{
mydisk_write(bid * 512, 512, buf);
return 0;
}
