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