zeek/scripts/base/frameworks/sumstats/plugins/sum.zeek
2019-04-11 21:12:40 -05:00

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##! Calculate the sum.
@load ../main
module SumStats;
export {
redef enum Calculation += {
## Calculate the sum of the values. For string values,
## this will be the number of strings.
SUM
};
redef record ResultVal += {
## For numeric data, this tracks the sum of all values.
sum: double &default=0.0;
};
#type threshold_function: function(key: SumStats::Key, result: SumStats::Result): count;
#global sum_threshold: function(data_id: string): threshold_function;
}
#function sum_threshold(data_id: string): threshold_function
# {
# return function(key: SumStats::Key, result: SumStats::Result): count
# {
# print fmt("data_id: %s", data_id);
# print result;
# return double_to_count(result[data_id]$sum);
# };
# }
hook init_resultval_hook(r: Reducer, rv: ResultVal)
{
if ( SUM in r$apply && ! rv?$sum )
rv$sum = 0;
}
hook register_observe_plugins()
{
register_observe_plugin(SUM, function(r: Reducer, val: double, obs: Observation, rv: ResultVal)
{
rv$sum += val;
});
}
hook compose_resultvals_hook(result: ResultVal, rv1: ResultVal, rv2: ResultVal)
{
if ( rv1?$sum || rv2?$sum )
{
result$sum = rv1?$sum ? rv1$sum : 0;
if ( rv2?$sum )
result$sum += rv2$sum;
}
}