prom/include/prom_histogram_buckets.h

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/*
Copyright 2019-2020 DigitalOcean Inc.
Copyright 2021 Jens Elkner <jel+libprom@cs.uni-magdeburg.de>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

#include "stdlib.h"

#ifndef PROM_HISTOGRAM_BUCKETS_H
#define PROM_HISTOGRAM_BUCKETS_H

typedef struct phb {
    int count;                      
    const double *upper_bound;      
    const char **key;               
} phb_t;

phb_t *phb_new(size_t count, double bucket, ...);

extern phb_t *prom_histogram_default_buckets;

phb_t *phb_linear(double start, double width, size_t count);

phb_t *phb_exponential(double start, double factor, size_t count);

int phb_destroy(phb_t *self);

size_t phb_count(phb_t *self);

#endif  // PROM_HISTOGRAM_BUCKETS_H