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author | rsiddharth <s@ricketyspace.net> | 2019-09-29 19:08:30 -0400 |
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committer | rsiddharth <s@ricketyspace.net> | 2020-04-17 20:56:34 -0400 |
commit | 8724cf43c27922c2a9eb10846bafbe2f3d8f7cef (patch) | |
tree | b3293ae472ff993ed8c066733b83a359e1ad5fe7 /nserver/src/stats.h | |
parent | 8f6dbe6d60a5425d7d21361d37c47d168a43d50a (diff) |
nserver: Add stats.h
Diffstat (limited to 'nserver/src/stats.h')
-rw-r--r-- | nserver/src/stats.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/nserver/src/stats.h b/nserver/src/stats.h new file mode 100644 index 0000000..997a505 --- /dev/null +++ b/nserver/src/stats.h @@ -0,0 +1,33 @@ +#ifndef stats_h +#define stats_h +#include <math.h> + +typedef struct Stats { + double sum; + double sumsq; + unsigned long n; + double min; + double max; +} Stats; + +Stats *Stats_recreate(double sum, double sumsq, unsigned long n, + double min, double max); + +Stats *Stats_create(); + +void Stats_sample(Stats *st, double s); + +void Stats_dump(Stats *st); + +static inline double Stats_mean(Stats *st) +{ + return st->sum / st->n; +} + +static inline double Stats_stddev(Stats *st) +{ + return sqrt((st->sumsq - (st->sum * st->sum / st->n)) / + (st->n - 1)); +} + +#endif |