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Add timespec handling code

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Alex Forencich 2019-07-22 18:00:55 -07:00
parent 32cadd4480
commit c44ffe2f92
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/* Functions for working with timespec structures
* Written by Daniel Collins (2017)
* timespec_mod by Alex Forencich (2019)
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* For more information, please refer to <http://unlicense.org/>
*/
/** \file timespec.c
* \brief Functions for working with timespec structures.
*
* This library aims to provide a comprehensive set of functions with
* well-defined behaviour that handle all edge cases (e.g. negative values) in
* a sensible manner.
*
* Negative values are allowed in the tv_sec and/or tv_usec field of timespec
* structures, tv_usec is always relative to tv_sec, so mixing positive and
* negative values will produce consistent results:
*
* <PRE>
* { tv_sec = 1, tv_nsec = 500000000 } == 1.5 seconds
* { tv_sec = 1, tv_nsec = 0 } == 1.0 seconds
* { tv_sec = 1, tv_nsec = -500000000 } == 0.5 seconds
* { tv_sec = 0, tv_nsec = 500000000 } == 0.5 seconds
* { tv_sec = 0, tv_nsec = 0 } == 0.0 seconds
* { tv_sec = 0, tv_nsec = -500000000 } == -0.5 seconds
* { tv_sec = -1, tv_nsec = 500000000 } == -0.5 seconds
* { tv_sec = -1, tv_nsec = 0 } == -1.0 seconds
* { tv_sec = -1, tv_nsec = -500000000 } == -1.5 seconds
* </PRE>
*
* Furthermore, any timespec structure processed or returned by library functions
* is normalised according to the rules in timespec_normalise().
*/
#include <stdbool.h>
#include <sys/time.h>
#include <time.h>
#include "timespec.h"
#define NSEC_PER_SEC 1000000000
/** \fn struct timespec timespec_add(struct timespec ts1, struct timespec ts2)
* \brief Returns the result of adding two timespec structures.
*/
struct timespec timespec_add(struct timespec ts1, struct timespec ts2)
{
/* Normalise inputs to prevent tv_nsec rollover if whole-second values
* are packed in it.
*/
ts1 = timespec_normalise(ts1);
ts2 = timespec_normalise(ts2);
ts1.tv_sec += ts2.tv_sec;
ts1.tv_nsec += ts2.tv_nsec;
return timespec_normalise(ts1);
}
/** \fn struct timespec timespec_sub(struct timespec ts1, struct timespec ts2)
* \brief Returns the result of subtracting ts2 from ts1.
*/
struct timespec timespec_sub(struct timespec ts1, struct timespec ts2)
{
/* Normalise inputs to prevent tv_nsec rollover if whole-second values
* are packed in it.
*/
ts1 = timespec_normalise(ts1);
ts2 = timespec_normalise(ts2);
ts1.tv_sec -= ts2.tv_sec;
ts1.tv_nsec -= ts2.tv_nsec;
return timespec_normalise(ts1);
}
/** \fn struct timespec timespec_mod(struct timespec ts1, struct timespec ts2)
* \brief Returns the remainder left over after dividing ts1 by ts2 (ts1%ts2).
*/
struct timespec timespec_mod(struct timespec ts1, struct timespec ts2)
{
int i = 0;
bool neg1 = false;
bool neg2 = false;
/* Normalise inputs to prevent tv_nsec rollover if whole-second values
* are packed in it.
*/
ts1 = timespec_normalise(ts1);
ts2 = timespec_normalise(ts2);
/* If inputs are negative, flip and record sign
*/
if (ts1.tv_sec < 0 || ts1.tv_nsec < 0)
{
neg1 = true;
ts1.tv_sec = -ts1.tv_sec;
ts1.tv_nsec = -ts1.tv_nsec;
}
if (ts2.tv_sec < 0 || ts2.tv_nsec < 0)
{
neg2 = true;
ts2.tv_sec = -ts2.tv_sec;
ts2.tv_nsec = -ts2.tv_nsec;
}
/* Shift ts2 until it is larger than ts1
*/
while ((ts2.tv_sec != 0 || ts2.tv_nsec != 0) && timespec_ge(ts1, ts2))
{
i++;
ts2.tv_nsec <<= 1;
ts2.tv_sec <<= 1;
if (ts2.tv_nsec > NSEC_PER_SEC)
{
ts2.tv_nsec -= NSEC_PER_SEC;
ts2.tv_sec++;
}
}
/* Division by repeated subtraction
*/
while (i > 0)
{
i--;
if (ts2.tv_sec & 1)
{
ts2.tv_nsec += NSEC_PER_SEC;
}
ts2.tv_nsec >>= 1;
ts2.tv_sec >>= 1;
if (timespec_ge(ts1, ts2))
{
ts1 = timespec_sub(ts1, ts2);
}
}
/* If signs differ and result is nonzero, subtract once more to cross zero
*/
if (neg1 ^ neg2 && (ts1.tv_sec != 0 || ts1.tv_nsec != 0))
{
ts1 = timespec_sub(ts1, ts2);
}
/* Restore sign
*/
if (neg1)
{
ts1.tv_sec = -ts1.tv_sec;
ts1.tv_nsec = -ts1.tv_nsec;
}
return ts1;
}
/** \fn bool timespec_eq(struct timespec ts1, struct timespec ts2)
* \brief Returns true if the two timespec structures are equal.
*/
bool timespec_eq(struct timespec ts1, struct timespec ts2)
{
return (ts1.tv_sec == ts2.tv_sec && ts1.tv_nsec == ts2.tv_nsec);
}
/** \fn bool timespec_gt(struct timespec ts1, struct timespec ts2)
* \brief Returns true if ts1 is greater than ts2.
*/
bool timespec_gt(struct timespec ts1, struct timespec ts2)
{
return (ts1.tv_sec > ts2.tv_sec || (ts1.tv_sec == ts2.tv_sec && ts1.tv_nsec > ts2.tv_nsec));
}
/** \fn bool timespec_ge(struct timespec ts1, struct timespec ts2)
* \brief Returns true if ts1 is greater than or equal to ts2.
*/
bool timespec_ge(struct timespec ts1, struct timespec ts2)
{
return (ts1.tv_sec > ts2.tv_sec || (ts1.tv_sec == ts2.tv_sec && ts1.tv_nsec >= ts2.tv_nsec));
}
/** \fn bool timespec_lt(struct timespec ts1, struct timespec ts2)
* \brief Returns true if ts1 is less than ts2.
*/
bool timespec_lt(struct timespec ts1, struct timespec ts2)
{
return (ts1.tv_sec < ts2.tv_sec || (ts1.tv_sec == ts2.tv_sec && ts1.tv_nsec < ts2.tv_nsec));
}
/** \fn bool timespec_le(struct timespec ts1, struct timespec ts2)
* \brief Returns true if ts1 is less than or equal to ts2.
*/
bool timespec_le(struct timespec ts1, struct timespec ts2)
{
return (ts1.tv_sec < ts2.tv_sec || (ts1.tv_sec == ts2.tv_sec && ts1.tv_nsec <= ts2.tv_nsec));
}
/** \fn struct timespec timespec_from_double(double s)
* \brief Converts a fractional number of seconds to a timespec.
*/
struct timespec timespec_from_double(double s)
{
struct timespec ts = {
.tv_sec = s,
.tv_nsec = (s - (long)(s)) * NSEC_PER_SEC,
};
return timespec_normalise(ts);
}
/** \fn double timespec_to_double(struct timespec ts)
* \brief Converts a timespec to a fractional number of seconds.
*/
double timespec_to_double(struct timespec ts)
{
return ((double)(ts.tv_sec) + ((double)(ts.tv_nsec) / NSEC_PER_SEC));
}
/** \fn struct timespec timespec_from_timeval(struct timeval tv)
* \brief Converts a timeval to a timespec.
*/
struct timespec timespec_from_timeval(struct timeval tv)
{
struct timespec ts = {
.tv_sec = tv.tv_sec,
.tv_nsec = tv.tv_usec * 1000
};
return timespec_normalise(ts);
}
/** \fn struct timeval timespec_to_timeval(struct timespec ts)
* \brief Converts a timespec to a timeval.
*/
struct timeval timespec_to_timeval(struct timespec ts)
{
ts = timespec_normalise(ts);
struct timeval tv = {
.tv_sec = ts.tv_sec,
.tv_usec = ts.tv_nsec / 1000,
};
return tv;
}
/** \fn struct timespec timespec_from_ms(long milliseconds)
* \brief Converts an integer number of milliseconds to a timespec.
*/
struct timespec timespec_from_ms(long milliseconds)
{
struct timespec ts = {
.tv_sec = (milliseconds / 1000),
.tv_nsec = (milliseconds % 1000) * 1000000,
};
return timespec_normalise(ts);
}
/** \fn long timespec_to_ms(struct timespec ts)
* \brief Converts a timespec to an integer number of milliseconds.
*/
long timespec_to_ms(struct timespec ts)
{
return (ts.tv_sec * 1000) + (ts.tv_nsec / 1000000);
}
/** \fn struct timespec timespec_normalise(struct timespec ts)
* \brief Normalises a timespec structure.
*
* Returns a normalised version of a timespec structure, according to the
* following rules:
*
* 1) If tv_nsec is >1,000,000,00 or <-1,000,000,000, flatten the surplus
* nanoseconds into the tv_sec field.
*
* 2) If tv_sec is >0 and tv_nsec is <0, decrement tv_sec and roll tv_nsec up
* to represent the same value on the positive side of the new tv_sec.
*
* 3) If tv_sec is <0 and tv_nsec is >0, increment tv_sec and roll tv_nsec down
* to represent the same value on the negative side of the new tv_sec.
*/
struct timespec timespec_normalise(struct timespec ts)
{
while(ts.tv_nsec >= NSEC_PER_SEC)
{
++(ts.tv_sec);
ts.tv_nsec -= NSEC_PER_SEC;
}
while(ts.tv_nsec <= -NSEC_PER_SEC)
{
--(ts.tv_sec);
ts.tv_nsec += NSEC_PER_SEC;
}
if(ts.tv_nsec < 0 && ts.tv_sec > 0)
{
/* Negative nanoseconds while seconds is positive.
* Decrement tv_sec and roll tv_nsec over.
*/
--(ts.tv_sec);
ts.tv_nsec = NSEC_PER_SEC - (-1 * ts.tv_nsec);
}
else if(ts.tv_nsec > 0 && ts.tv_sec < 0)
{
/* Positive nanoseconds while seconds is negative.
* Increment tv_sec and roll tv_nsec over.
*/
++(ts.tv_sec);
ts.tv_nsec = -NSEC_PER_SEC - (-1 * ts.tv_nsec);
}
return ts;
}
#ifdef TEST
#include <stdio.h>
#define TEST_NORMALISE(ts_sec, ts_nsec, expect_sec, expect_nsec) { \
struct timespec in = { .tv_sec = ts_sec, .tv_nsec = ts_nsec }; \
struct timespec got = timespec_normalise(in); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_normalise({%ld, %ld}) returned wrong values\n", (long)(ts_sec), (long)(ts_nsec)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_ADD(ts1_sec, ts1_nsec, ts2_sec, ts2_nsec, expect_sec, expect_nsec) { \
struct timespec ts1 = { .tv_sec = ts1_sec, .tv_nsec = ts1_nsec }; \
struct timespec ts2 = { .tv_sec = ts2_sec, .tv_nsec = ts2_nsec }; \
struct timespec got = timespec_add(ts1, ts2); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_add({%ld, %ld}, {%ld, %ld}) returned wrong values\n", \
(long)(ts1_sec), (long)(ts1_nsec), (long)(ts2_sec), (long)(ts2_nsec)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_SUB(ts1_sec, ts1_nsec, ts2_sec, ts2_nsec, expect_sec, expect_nsec) { \
struct timespec ts1 = { .tv_sec = ts1_sec, .tv_nsec = ts1_nsec }; \
struct timespec ts2 = { .tv_sec = ts2_sec, .tv_nsec = ts2_nsec }; \
struct timespec got = timespec_sub(ts1, ts2); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_sub({%ld, %ld}, {%ld, %ld}) returned wrong values\n", \
(long)(ts1_sec), (long)(ts1_nsec), (long)(ts2_sec), (long)(ts2_nsec)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_MOD(ts1_sec, ts1_nsec, ts2_sec, ts2_nsec, expect_sec, expect_nsec) { \
struct timespec ts1 = { .tv_sec = ts1_sec, .tv_nsec = ts1_nsec }; \
struct timespec ts2 = { .tv_sec = ts2_sec, .tv_nsec = ts2_nsec }; \
struct timespec got = timespec_mod(ts1, ts2); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_mod({%ld, %ld}, {%ld, %ld}) returned wrong values\n", \
(long)(ts1_sec), (long)(ts1_nsec), (long)(ts2_sec), (long)(ts2_nsec)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_TEST_FUNC(func, ts1_sec, ts1_nsec, ts2_sec, ts2_nsec, expect) { \
struct timespec ts1 = { .tv_sec = ts1_sec, .tv_nsec = ts1_nsec }; \
struct timespec ts2 = { .tv_sec = ts2_sec, .tv_nsec = ts2_nsec }; \
if(func(ts1, ts2) != expect) { \
printf(#func "({%ld, %ld}, {%ld, %ld}) returned %s\n", \
(long)(ts1_sec), (long)(ts1_nsec), (long)(ts2_sec), (long)(ts2_nsec), \
(expect ? "FALSE" : "TRUE")); \
result = 1; \
} \
}
#define TEST_FROM_DOUBLE(d_secs, expect_sec, expect_nsec) { \
struct timespec got = timespec_from_double(d_secs); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_from_double(%f) returned wrong values\n", (double)(d_secs)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_TO_DOUBLE(ts_sec, ts_nsec, expect) { \
struct timespec ts = { .tv_sec = ts_sec, .tv_nsec = ts_nsec }; \
double got = timespec_to_double(ts); \
if(got != expect) { \
printf("timespec_to_double({%ld, %ld}) returned wrong value\n", (long)(ts_sec), (long)(ts_nsec)); \
printf(" Expected: %f\n", (double)(expect)); \
printf(" Got: %f\n", got); \
result = 1; \
} \
}
#define TEST_FROM_TIMEVAL(in_sec, in_usec, expect_sec, expect_nsec) { \
struct timeval tv = { .tv_sec = in_sec, .tv_usec = in_usec }; \
struct timespec got = timespec_from_timeval(tv); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_from_timeval({%ld, %ld}) returned wrong values\n", (long)(in_sec), (long)(in_usec)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_TO_TIMEVAL(ts_sec, ts_nsec, expect_sec, expect_usec) { \
struct timespec ts = { .tv_sec = ts_sec, .tv_nsec = ts_nsec }; \
struct timeval got = timespec_to_timeval(ts); \
if(got.tv_sec != expect_sec || got.tv_usec != expect_usec) \
{ \
printf("timespec_to_timeval({%ld, %ld}) returned wrong values\n", (long)(ts_sec), (long)(ts_nsec)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_usec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_usec)); \
result = 1; \
} \
}
#define TEST_FROM_MS(msecs, expect_sec, expect_nsec) { \
struct timespec got = timespec_from_ms(msecs); \
if(got.tv_sec != expect_sec || got.tv_nsec != expect_nsec) \
{ \
printf("timespec_from_ms(%ld) returned wrong values\n", (long)(msecs)); \
printf(" Expected: {%ld, %ld}\n", (long)(expect_sec), (long)(expect_nsec)); \
printf(" Got: {%ld, %ld}\n", (long)(got.tv_sec), (long)(got.tv_nsec)); \
result = 1; \
} \
}
#define TEST_TO_MS(ts_sec, ts_nsec, expect) { \
struct timespec ts = { .tv_sec = ts_sec, .tv_nsec = ts_nsec }; \
long got = timespec_to_ms(ts); \
if(got != expect) { \
printf("timespec_to_ms({%ld, %ld}) returned wrong value\n", (long)(ts_sec), (long)(ts_nsec)); \
printf(" Expected: %ld\n", (long)(expect)); \
printf(" Got: %ld\n", got); \
result = 1; \
} \
}
int main()
{
int result = 0;
// timespec_add
TEST_ADD(0,0, 0,0, 0,0);
TEST_ADD(0,0, 1,0, 1,0);
TEST_ADD(1,0, 0,0, 1,0);
TEST_ADD(1,0, 1,0, 2,0);
TEST_ADD(1,500000000, 1,0, 2,500000000);
TEST_ADD(1,0, 1,500000000, 2,500000000);
TEST_ADD(1,500000000, 1,500000000, 3,0);
TEST_ADD(1,500000000, 1,499999999, 2,999999999);
TEST_ADD(1,500000000, 1,500000000, 3,0);
TEST_ADD(1,999999999, 1,999999999, 3,999999998);
TEST_ADD(0,500000000, 1,500000000, 2,0);
TEST_ADD(1,500000000, 0,500000000, 2,0);
// timespec_sub
TEST_SUB(0,0, 0,0, 0,0);
TEST_SUB(1,0, 0,0, 1,0);
TEST_SUB(1,0, 1,0, 0,0);
TEST_SUB(1,500000000, 0,500000000, 1,0);
TEST_SUB(5,500000000, 2,999999999, 2,500000001);
TEST_SUB(0,0, 1,0, -1,0);
TEST_SUB(0,500000000, 1,500000000, -1,0);
TEST_SUB(0,0, 1,500000000, -1,-500000000);
TEST_SUB(1,0, 1,500000000, 0,-500000000);
TEST_SUB(1,0, 1,499999999, 0,-499999999);
// timespec_mod
TEST_MOD(0,0, 0,0, 0,0);
TEST_MOD(0,0, 1,0, 0,0);
TEST_MOD(1,0, 0,0, 1,0);
TEST_MOD(1,0, 1,0, 0,0);
TEST_MOD(10,0, 1,0, 0,0);
TEST_MOD(10,0, 3,0, 1,0);
TEST_MOD(10,0, -3,0, -2,0);
TEST_MOD(-10,0, 3,0, 2,0);
TEST_MOD(-10,0, -3,0, -1,0);
TEST_MOD(10,0, 5,0, 0,0);
TEST_MOD(10,0, -5,0, 0,0);
TEST_MOD(-10,0, 5,0, 0,0);
TEST_MOD(-10,0, -5,0, 0,0);
TEST_MOD(1,500000000, 0,500000000, 0,0);
TEST_MOD(5,500000000, 2,999999999, 2,500000001);
TEST_MOD(0,500000000, 1,500000000, 0,500000000);
TEST_MOD(0,0, 1,500000000, 0,0);
TEST_MOD(1,0, 1,500000000, 1,0);
TEST_MOD(1,0, 0,1, 0,0);
TEST_MOD(1,123456789, 0,1000, 0,789);
TEST_MOD(1,0, 0,9999999, 0,100);
TEST_MOD(12345,54321, 0,100001, 0,5555);
// timespec_eq
TEST_TEST_FUNC(timespec_eq, 0,0, 0,0, true);
TEST_TEST_FUNC(timespec_eq, 100,0, 100,0, true);
TEST_TEST_FUNC(timespec_eq, -200,0, -200,0, true);
TEST_TEST_FUNC(timespec_eq, 0,300, 0,300, true);
TEST_TEST_FUNC(timespec_eq, 0,-400, 0,-400, true);
TEST_TEST_FUNC(timespec_eq, 100,1, 100,0, false);
TEST_TEST_FUNC(timespec_eq, 101,0, 100,0, false);
TEST_TEST_FUNC(timespec_eq, -100,0, 100,0, false);
TEST_TEST_FUNC(timespec_eq, 0,10, 0,-10, false);
// timespec_gt
TEST_TEST_FUNC(timespec_gt, 1,0, 0,0, true);
TEST_TEST_FUNC(timespec_gt, 0,0, -1,0, true);
TEST_TEST_FUNC(timespec_gt, 0,1, 0,0, true);
TEST_TEST_FUNC(timespec_gt, 0,0, 0,-1, true);
TEST_TEST_FUNC(timespec_gt, 1,0, 1,0, false);
TEST_TEST_FUNC(timespec_gt, 1,1, 1,1, false);
TEST_TEST_FUNC(timespec_gt, -1,0, 0,0, false);
TEST_TEST_FUNC(timespec_gt, 0,-1, 0,0, false);
// timespec_ge
TEST_TEST_FUNC(timespec_ge, 1,0, 0,0, true);
TEST_TEST_FUNC(timespec_ge, 0,0, -1,0, true);
TEST_TEST_FUNC(timespec_ge, 0,1, 0,0, true);
TEST_TEST_FUNC(timespec_ge, 0,0, 0,-1, true);
TEST_TEST_FUNC(timespec_ge, 1,0, 1,0, true);
TEST_TEST_FUNC(timespec_ge, 1,1, 1,1, true);
TEST_TEST_FUNC(timespec_ge, -1,0, 0,0, false);
TEST_TEST_FUNC(timespec_ge, 0,-1, 0,0, false);
// timespec_lt
TEST_TEST_FUNC(timespec_lt, 0,0, 1,0, true);
TEST_TEST_FUNC(timespec_lt, -1,0, 0,0, true);
TEST_TEST_FUNC(timespec_lt, 0,0, 0,1, true);
TEST_TEST_FUNC(timespec_lt, 0,-1, 0,0, true);
TEST_TEST_FUNC(timespec_lt, 1,0, 1,0, false);
TEST_TEST_FUNC(timespec_lt, 1,1, 1,1, false);
TEST_TEST_FUNC(timespec_lt, 0,0, -1,0, false);
TEST_TEST_FUNC(timespec_lt, 0,0, 0,-1, false);
// timespec_le
TEST_TEST_FUNC(timespec_le, 0,0, 1,0, true);
TEST_TEST_FUNC(timespec_le, -1,0, 0,0, true);
TEST_TEST_FUNC(timespec_le, 0,0, 0,1, true);
TEST_TEST_FUNC(timespec_le, 0,-1, 0,0, true);
TEST_TEST_FUNC(timespec_le, 1,0, 1,0, true);
TEST_TEST_FUNC(timespec_le, 1,1, 1,1, true);
TEST_TEST_FUNC(timespec_le, 0,0, -1,0, false);
TEST_TEST_FUNC(timespec_le, 0,0, 0,-1, false);
// timespec_from_double
TEST_FROM_DOUBLE(0.0, 0,0);
TEST_FROM_DOUBLE(10.0, 10,0);
TEST_FROM_DOUBLE(-10.0, -10,0);
TEST_FROM_DOUBLE(0.5, 0,500000000);
TEST_FROM_DOUBLE(-0.5, 0,-500000000);
TEST_FROM_DOUBLE(10.5, 10,500000000);
TEST_FROM_DOUBLE(-10.5, -10,-500000000);
// timespec_to_double
TEST_TO_DOUBLE(0,0, 0.0);
TEST_TO_DOUBLE(10,0, 10.0);
TEST_TO_DOUBLE(-10,0, -10.0);
TEST_TO_DOUBLE(0,500000000, 0.5);
TEST_TO_DOUBLE(0,-500000000, -0.5);
TEST_TO_DOUBLE(10,500000000, 10.5);
TEST_TO_DOUBLE(10,-500000000, 9.5);
TEST_TO_DOUBLE(-10,500000000, -9.5);
TEST_TO_DOUBLE(-10,-500000000, -10.5);
// timespec_from_timeval
TEST_FROM_TIMEVAL(0,0, 0,0);
TEST_FROM_TIMEVAL(1,0, 1,0);
TEST_FROM_TIMEVAL(1000,0, 1000,0);
TEST_FROM_TIMEVAL(0,0, 0,0);
TEST_FROM_TIMEVAL(-1,0, -1,0);
TEST_FROM_TIMEVAL(-1000,0, -1000,0);
TEST_FROM_TIMEVAL(1,1, 1,1000);
TEST_FROM_TIMEVAL(1,1000, 1,1000000);
TEST_FROM_TIMEVAL(1,-1, 0,999999000);
TEST_FROM_TIMEVAL(1,-1000, 0,999000000);
TEST_FROM_TIMEVAL(-1,-1, -1,-1000);
TEST_FROM_TIMEVAL(-1,-1000, -1,-1000000);
// timespec_to_timeval
TEST_TO_TIMEVAL(0,0, 0,0);
TEST_TO_TIMEVAL(1,0, 1,0);
TEST_TO_TIMEVAL(10,0, 10,0);
TEST_TO_TIMEVAL(-1,0, -1,0);
TEST_TO_TIMEVAL(-10,0, -10,0);
TEST_TO_TIMEVAL(1,1, 1,0);
TEST_TO_TIMEVAL(1,999, 1,0);
TEST_TO_TIMEVAL(1,1000, 1,1);
TEST_TO_TIMEVAL(1,1001, 1,1);
TEST_TO_TIMEVAL(1,2000, 1,2);
TEST_TO_TIMEVAL(1,2000000, 1,2000);
TEST_TO_TIMEVAL(1,-1, 0,999999);
TEST_TO_TIMEVAL(1,-999, 0,999999);
TEST_TO_TIMEVAL(1,-1000, 0,999999);
TEST_TO_TIMEVAL(1,-1001, 0,999998);
TEST_TO_TIMEVAL(1,-2000, 0,999998);
TEST_TO_TIMEVAL(1,-2000000, 0,998000);
TEST_TO_TIMEVAL(-1,-1, -1,0);
TEST_TO_TIMEVAL(-1,-999, -1,0);
TEST_TO_TIMEVAL(-1,-1000, -1,-1);
TEST_TO_TIMEVAL(-1,-1001, -1,-1);
TEST_TO_TIMEVAL(-1,-2000, -1,-2);
TEST_TO_TIMEVAL(-1,-2000000, -1,-2000);
TEST_TO_TIMEVAL(1,1500000000, 2,500000);
TEST_TO_TIMEVAL(1,-1500000000, 0,-500000);
TEST_TO_TIMEVAL(-1,-1500000000, -2,-500000);
// timespec_from_ms
TEST_FROM_MS(0, 0,0);
TEST_FROM_MS(1, 0,1000000);
TEST_FROM_MS(-1, 0,-1000000);
TEST_FROM_MS(1500, 1,500000000);
TEST_FROM_MS(-1000, -1,0);
TEST_FROM_MS(-1500, -1,-500000000);
// timespec_to_ms
TEST_TO_MS(0,0, 0);
TEST_TO_MS(10,0, 10000);
TEST_TO_MS(-10,0, -10000);
TEST_TO_MS(0,500000000, 500);
TEST_TO_MS(0,-500000000, -500);
TEST_TO_MS(10,500000000, 10500);
TEST_TO_MS(10,-500000000, 9500);
TEST_TO_MS(-10,500000000, -9500);
TEST_TO_MS(-10,-500000000, -10500);
// timespec_normalise
TEST_NORMALISE(0,0, 0,0);
TEST_NORMALISE(0,1000000000, 1,0);
TEST_NORMALISE(0,1500000000, 1,500000000);
TEST_NORMALISE(0,-1000000000, -1,0);
TEST_NORMALISE(0,-1500000000, -1,-500000000);
TEST_NORMALISE(5,1000000000, 6,0);
TEST_NORMALISE(5,1500000000, 6,500000000);
TEST_NORMALISE(-5,-1000000000, -6,0);
TEST_NORMALISE(-5,-1500000000, -6,-500000000);
TEST_NORMALISE(0,2000000000, 2,0);
TEST_NORMALISE(0,2500000000, 2,500000000);
TEST_NORMALISE(0,-2000000000, -2,0);
TEST_NORMALISE(0,-2500000000, -2,-500000000);
TEST_NORMALISE(1,-500000001, 0,499999999);
TEST_NORMALISE(1,-500000000, 0,500000000);
TEST_NORMALISE(1,-499999999, 0,500000001);
TEST_NORMALISE(-1,500000000, 0,-500000000);
TEST_NORMALISE(-1,499999999, 0,-500000001);
if(result > 0)
{
printf("%d tests failed\n", result);
}
else{
printf("All tests passed\n");
}
return result;
}
#endif

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/* Functions for working with timespec structures
* Written by Daniel Collins (2017)
* timespec_mod by Alex Forencich (2019)
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* For more information, please refer to <http://unlicense.org/>
*/
#ifndef DAN_TIMESPEC_H
#define DAN_TIMESPEC_H
#include <stdbool.h>
#include <sys/time.h>
#include <time.h>
#ifdef __cplusplus
extern "C" {
#endif
struct timespec timespec_add(struct timespec ts1, struct timespec ts2);
struct timespec timespec_sub(struct timespec ts1, struct timespec ts2);
struct timespec timespec_mod(struct timespec ts1, struct timespec ts2);
bool timespec_eq(struct timespec ts1, struct timespec ts2);
bool timespec_gt(struct timespec ts1, struct timespec ts2);
bool timespec_ge(struct timespec ts1, struct timespec ts2);
bool timespec_lt(struct timespec ts1, struct timespec ts2);
bool timespec_le(struct timespec ts1, struct timespec ts2);
struct timespec timespec_from_double(double s);
double timespec_to_double(struct timespec ts);
struct timespec timespec_from_timeval(struct timeval tv);
struct timeval timespec_to_timeval(struct timespec ts);
struct timespec timespec_from_ms(long milliseconds);
long timespec_to_ms(struct timespec ts);
struct timespec timespec_normalise(struct timespec ts);
#ifdef __cplusplus
}
#endif
#endif /* !DAN_TIMESPEC_H */