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Nanosecond/millisecond integer to RelativeTime conversion

This commit is contained in:
Vftdan 2024-08-19 21:15:48 +02:00
parent 125e2ad5d8
commit bca67c9663
1 changed files with 40 additions and 0 deletions
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40
time.h
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@ -3,6 +3,7 @@
#include <time.h> #include <time.h>
#define NANOSECONDS_IN_SECOND 1000000000 #define NANOSECONDS_IN_SECOND 1000000000
#define MILLISECONDS_IN_SECOND 1000
typedef struct { typedef struct {
struct timespec absolute; struct timespec absolute;
@ -12,6 +13,29 @@ typedef struct {
struct timespec relative; struct timespec relative;
} RelativeTime; } RelativeTime;
__attribute__((unused)) inline static void
timespec_assign_nanosecond(struct timespec *target, long long ns)
{
time_t sec = ns / NANOSECONDS_IN_SECOND;
if (ns < 0) {
sec -= 1;
}
target->tv_sec = sec;
target->tv_nsec = ns - sec * NANOSECONDS_IN_SECOND;
}
__attribute__((unused)) inline static void
timespec_assign_millisecond(struct timespec *target, long long ms)
{
time_t sec = ms / MILLISECONDS_IN_SECOND;
if (ms < 0) {
sec -= 1;
}
ms -= sec * MILLISECONDS_IN_SECOND;
target->tv_sec = sec;
target->tv_nsec = ms * (NANOSECONDS_IN_SECOND / MILLISECONDS_IN_SECOND);
}
__attribute__((unused)) inline static void __attribute__((unused)) inline static void
timespec_add(struct timespec *accum, const struct timespec *item) timespec_add(struct timespec *accum, const struct timespec *item)
{ {
@ -87,6 +111,22 @@ absolute_time_sub_absolute(AbsoluteTime lhs, AbsoluteTime rhs)
return result; return result;
} }
__attribute__((unused)) inline static RelativeTime
relative_time_from_nanosecond(long long ns)
{
RelativeTime result;
timespec_assign_nanosecond(&result.relative, ns);
return result;
}
__attribute__((unused)) inline static RelativeTime
relative_time_from_millisecond(long long ms)
{
RelativeTime result;
timespec_assign_millisecond(&result.relative, ms);
return result;
}
__attribute__((unused)) inline static RelativeTime __attribute__((unused)) inline static RelativeTime
relative_time_add(RelativeTime lhs, RelativeTime rhs) relative_time_add(RelativeTime lhs, RelativeTime rhs)
{ {