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/* -*- c -*- */
#include <random.h>
#include <stdio.h>
#include <string.h>
#include <syscall.h>
#include "tests/lib.h"
#include "tests/main.h"
#if TEST_SIZE % BLOCK_SIZE != 0
#error TEST_SIZE must be a multiple of BLOCK_SIZE
#endif
#define BLOCK_CNT (TEST_SIZE / BLOCK_SIZE)
char buf[TEST_SIZE];
int order[BLOCK_CNT];
void
test_main (void)
{
const char *file_name = "bazzle";
int fd;
size_t i;
random_init (57);
random_bytes (buf, sizeof buf);
for (i = 0; i < BLOCK_CNT; i++)
order[i] = i;
CHECK (create (file_name, TEST_SIZE), "create \"%s\"", file_name);
CHECK ((fd = open (file_name)) > 1, "open \"%s\"", file_name);
msg ("write \"%s\" in random order", file_name);
shuffle (order, BLOCK_CNT, sizeof *order);
for (i = 0; i < BLOCK_CNT; i++)
{
size_t ofs = BLOCK_SIZE * order[i];
seek (fd, ofs);
if (write (fd, buf + ofs, BLOCK_SIZE) != BLOCK_SIZE)
fail ("write %d bytes at offset %zu failed", (int) BLOCK_SIZE, ofs);
}
msg ("read \"%s\" in random order", file_name);
shuffle (order, BLOCK_CNT, sizeof *order);
for (i = 0; i < BLOCK_CNT; i++)
{
char block[BLOCK_SIZE];
size_t ofs = BLOCK_SIZE * order[i];
seek (fd, ofs);
if (read (fd, block, BLOCK_SIZE) != BLOCK_SIZE)
fail ("read %d bytes at offset %zu failed", (int) BLOCK_SIZE, ofs);
compare_bytes (block, buf + ofs, BLOCK_SIZE, ofs, file_name);
}
msg ("close \"%s\"", file_name);
close (fd);
}
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