/*-
* Copyright (c) 2011 Giorgos Keramidas. All rights reserved.
* Copyright (c) 2007 Diomidis Spinellis. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <float.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <strings.h>
#include <syslog.h>
#include <time.h>
#include <atf-c.h>
#define KASSERT(val, msg) assert(val)
typedef u_int32_t comp_t;
#define AHZ 1000000
#include "convert.c"
union cf {
comp_t c;
float f;
};
static void
check_result(const char *name, float expected, union cf v)
{
double eps;
eps = fabs(expected - v.f) / expected;
ATF_CHECK(eps <= FLT_EPSILON);
if (eps > FLT_EPSILON) {
printf("Error in %s\n", name);
printf("Got 0x%08x %12g\n", v.c, v.f);
v.f = expected;
printf("Expected 0x%08x %12g (%.15lg)\n", v.c, v.f, expected);
printf("Epsilon=%lg, rather than %g\n", eps, FLT_EPSILON);
}
}
/*
* Test case for encoding {0 sec, 0 usec} within a reasonable epsilon.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_zero);
ATF_TC_BODY(encode_tv_zero, tc)
{
union cf v;
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
v.c = encode_timeval(tv);
ATF_CHECK(fabs(v.f - 0.0) < FLT_EPSILON);
}
/*
* Test case for encoding a random long number.
*/
ATF_TC_WITHOUT_HEAD(encode_long);
ATF_TC_BODY(encode_long, tc)
{
union cf v;
long l;
l = random();
v.c = encode_long(l);
check_result(atf_tc_get_ident(tc), l, v);
}
/*
* Test case for encoding a small number of seconds {1 sec, 0 usec}.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_only_sec);
ATF_TC_BODY(encode_tv_only_sec, tc)
{
union cf v;
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
v.c = encode_timeval(tv);
check_result(atf_tc_get_ident(tc),
(float)tv.tv_sec * AHZ + tv.tv_usec, v);
}
/*
* Test case for encoding a small number of usec {0 sec, 1 usec}.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_only_usec);
ATF_TC_BODY(encode_tv_only_usec, tc)
{
union cf v;
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 1;
v.c = encode_timeval(tv);
check_result(atf_tc_get_ident(tc),
(float)tv.tv_sec * AHZ + tv.tv_usec, v);
}
/*
* Test case for encoding a large number of usec {1 sec, 999.999 usec}.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_many_usec);
ATF_TC_BODY(encode_tv_many_usec, tc)
{
union cf v;
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 999999L;
v.c = encode_timeval(tv);
check_result(atf_tc_get_ident(tc),
(float)tv.tv_sec * AHZ + tv.tv_usec, v);
}
/*
* Test case for encoding a huge number of usec {1 sec, 1.000.000 usec} that
* overflows the usec counter and should show up as an increase in timeval's
* seconds instead.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_usec_overflow);
ATF_TC_BODY(encode_tv_usec_overflow, tc)
{
union cf v;
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 1000000L;
v.c = encode_timeval(tv);
check_result(atf_tc_get_ident(tc),
(float)tv.tv_sec * AHZ + tv.tv_usec, v);
}
/*
* Test case for encoding a very large number of seconds, one that is very
* near to the limit of 32-bit signed values. With a usec value of 999.999
* microseconds this should result in the largest value we can represent with
* a timeval struct.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_upper_limit);
ATF_TC_BODY(encode_tv_upper_limit, tc)
{
union cf v;
struct timeval tv;
tv.tv_sec = 2147483647L;
tv.tv_usec = 999999L;
v.c = encode_timeval(tv);
check_result(atf_tc_get_ident(tc),
(float)tv.tv_sec * AHZ + tv.tv_usec, v);
}
/*
* Test case for encoding a million random timeval objects, and checking that
* the conversion does not diverge too much from the expected values.
*/
ATF_TC_WITHOUT_HEAD(encode_tv_random_million);
ATF_TC_BODY(encode_tv_random_million, tc)
{
union cf v;
struct timeval tv;
long k;
#ifdef __LP64__
atf_tc_expect_fail("the testcase violates FLT_EPSILON on 64-bit "
"platforms, e.g. amd64");
#endif
ATF_REQUIRE_MSG(unsetenv("TZ") == 0, "unsetting TZ failed; errno=%d", errno);
for (k = 1; k < 1000000L; k++) {
tv.tv_sec = random();
tv.tv_usec = (random() % 1000000L);
v.c = encode_timeval(tv);
check_result(atf_tc_get_ident(tc),
(float)tv.tv_sec * AHZ + tv.tv_usec, v);
}
}
/* ---------------------------------------------------------------------
* Main.
* --------------------------------------------------------------------- */
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, encode_long);
ATF_TP_ADD_TC(tp, encode_tv_zero);
ATF_TP_ADD_TC(tp, encode_tv_only_sec);
ATF_TP_ADD_TC(tp, encode_tv_only_usec);
ATF_TP_ADD_TC(tp, encode_tv_many_usec);
ATF_TP_ADD_TC(tp, encode_tv_usec_overflow);
ATF_TP_ADD_TC(tp, encode_tv_upper_limit);
ATF_TP_ADD_TC(tp, encode_tv_random_million);
return atf_no_error();
}