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added timex_isnormalized

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This commit is contained in:
Christian Mehlis 2013-12-25 18:13:55 +01:00
parent a19ff87d21
commit 93ddf37d81
2 changed files with 39 additions and 0 deletions
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7
sys/include/timex.h
View File

@ -41,6 +41,13 @@ int timex_cmp(const timex_t a, const timex_t b);
*/
void timex_normalize(timex_t *time);
/**
* @brief Tests a timex_t for normalization
*
* @return true for a normalized timex_t, false otherwise
*/
int timex_isnormalized(timex_t *time);
/**
* @brief Denormalizes a timex_t to a uint64_t
*

32
sys/timex/timex.c
View File

@ -1,12 +1,21 @@
#include <stdio.h>
#include <inttypes.h>
#define ENABLE_DEBUG (0)
#include "debug.h"
#include "timex.h"
#define SEC_IN_USEC 1000000
timex_t timex_add(const timex_t a, const timex_t b)
{
#if ENABLE_DEBUG
if (!timex_isnormalized(a) || !timex_isnormalized(b)) {
puts("timex_add on denormalized value");
}
#endif
timex_t result;
result.seconds = a.seconds + b.seconds;
result.microseconds = a.microseconds + b.microseconds;
@ -29,17 +38,34 @@ void timex_normalize(timex_t *time)
time->microseconds %= SEC_IN_USEC;
}
int timex_isnormalized(timex_t *time)
{
return (time->microseconds < SEC_IN_USEC);
}
timex_t timex_set(uint32_t seconds, uint32_t microseconds)
{
timex_t result;
result.seconds = seconds;
result.microseconds = microseconds;
#if ENABLE_DEBUG
if (!timex_isnormalized(result)) {
puts("timex_set on denormalized value");
}
#endif
return result;
}
timex_t timex_sub(const timex_t a, const timex_t b)
{
#if ENABLE_DEBUG
if (!timex_isnormalized(a) || !timex_isnormalized(b)) {
puts("timex_sub on denormalized value");
}
#endif
timex_t result;
result.seconds = a.seconds - b.seconds;
result.microseconds = a.microseconds - b.microseconds;
@ -49,6 +75,12 @@ timex_t timex_sub(const timex_t a, const timex_t b)
int timex_cmp(const timex_t a, const timex_t b)
{
#if ENABLE_DEBUG
if (!timex_isnormalized(a) || !timex_isnormalized(b)) {
puts("timex_cmp on denormalized value");
}
#endif
if (a.seconds < b.seconds) {
return -1;
}