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sys/timex: change type of NS_PER_SEC

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Having NS_PER_SEC defined as `1000000000U` is quite a foot gun, as
multiplication even with small numbers in 32 bit quickly overflows. Using the
`1000000000LLU` instead forces 64 bit math.
This commit is contained in:
Marian Buschsieweke 2020-12-02 17:49:58 +01:00
parent 3234b918e3
commit d59607ddb7
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1 changed files with 1 additions and 1 deletions
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sys/include/timex.h
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@ -66,7 +66,7 @@ extern "C" {
/**
* @brief The number of nanoseconds per second
*/
#define NS_PER_SEC (1000000000U)
#define NS_PER_SEC (1000000000LLU)
/**
* @brief The maximum length of the string representation of a timex timestamp