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/* Tests of functions to access `dev_t' values.
Copyright (C) 2016-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <stdio.h>
#include <inttypes.h>
/* Confirm that makedev (major (d), minor (d)) == d. */
static int
do_test_split_combine (dev_t d1)
{
unsigned int maj = major (d1);
unsigned int min = minor (d1);
dev_t d2 = makedev (maj, min);
if (d1 != d2)
{
printf ("FAIL: %016" PRIx64 " != %016" PRIx64 " (maj %08x min %08x)\n",
(uint64_t)d2, (uint64_t)d1, maj, min);
return 1;
}
else
return 0;
}
/* Confirm that major (makedev (maj, min)) == maj and
minor (makedev (maj, min)) == min. */
static int
do_test_combine_split (unsigned int maj1, unsigned int min1)
{
dev_t d = makedev (maj1, min1);
unsigned int maj2 = major (d);
unsigned int min2 = minor (d);
if (maj1 != maj2 && min1 != min2)
{
printf ("FAIL: %08x != %08x, %08x != %08x (dev %016" PRIx64 ")\n",
maj2, maj1, min2, min1, (uint64_t)d);
return 1;
}
else if (maj1 != maj2)
{
printf ("FAIL: %08x != %08x, %08x == %08x (dev %016" PRIx64 ")\n",
maj2, maj1, min2, min1, (uint64_t)d);
return 1;
}
else if (min1 != min2)
{
printf ("FAIL: %08x == %08x, %08x != %08x (dev %016" PRIx64 ")\n",
maj2, maj1, min2, min1, (uint64_t)d);
return 1;
}
else
return 0;
}
static int
do_test (void)
{
dev_t d;
unsigned int maj, min;
int status = 0;
/* Test the traditional range (16-bit dev_t, 8-bit each maj/min)
exhaustively. */
for (d = 0; d <= 0xFFFF; d++)
status |= do_test_split_combine (d);
for (maj = 0; maj <= 0xFF; maj++)
for (min = 0; min <= 0xFF; min++)
status |= do_test_combine_split (maj, min);
/* Test glibc's expanded range (64-bit dev_t, 32-bit each maj/min).
Exhaustive testing would take much too long, instead we shift a
pair of 1-bits over each range. */
{
unsigned int a, b;
for (a = 0; a <= 63; a++)
do_test_split_combine (((dev_t) 0x03) << a);
for (a = 0; a < 31; a++)
for (b = 0; b <= 31; b++)
do_test_combine_split (0x03u << a, 0x03u << b);
}
return status;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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