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https://gitlab.torproject.org/tpo/core/tor.git
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139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
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/**
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* \file prob_distr.h
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*
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* \brief Header for prob_distr.c
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**/
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#ifndef TOR_PROB_DISTR_H
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#define TOR_PROB_DISTR_H
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#include "lib/cc/compat_compiler.h"
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#include "lib/cc/torint.h"
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#include "lib/testsupport/testsupport.h"
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/**
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* Container for distribution parameters for sampling, CDF, &c.
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*/
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struct dist {
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const struct dist_ops *ops;
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};
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#define DIST_BASE(OPS) { .ops = (OPS) }
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const char *dist_name(const struct dist *);
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double dist_sample(const struct dist *);
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double dist_cdf(const struct dist *, double x);
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double dist_sf(const struct dist *, double x);
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double dist_icdf(const struct dist *, double p);
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double dist_isf(const struct dist *, double p);
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struct dist_ops {
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const char *name;
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double (*sample)(const struct dist *);
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double (*cdf)(const struct dist *, double x);
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double (*sf)(const struct dist *, double x);
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double (*icdf)(const struct dist *, double p);
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double (*isf)(const struct dist *, double p);
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};
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/* Geometric distribution on positive number of trials before first success */
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struct geometric {
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struct dist base;
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double p; /* success probability */
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};
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extern const struct dist_ops geometric_ops;
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/* Pareto distribution */
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struct genpareto {
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struct dist base;
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double mu;
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double sigma;
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double xi;
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};
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extern const struct dist_ops genpareto_ops;
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/* Weibull distribution */
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struct weibull {
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struct dist base;
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double lambda;
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double k;
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};
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extern const struct dist_ops weibull_ops;
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/* Log-logistic distribution */
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struct log_logistic {
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struct dist base;
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double alpha;
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double beta;
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};
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extern const struct dist_ops log_logistic_ops;
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/* Logistic distribution */
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struct logistic {
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struct dist base;
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double mu;
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double sigma;
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};
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extern const struct dist_ops logistic_ops;
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/* Uniform distribution */
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struct uniform {
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struct dist base;
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double a;
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double b;
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};
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extern const struct dist_ops uniform_ops;
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/** Only by unittests */
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#ifdef PROB_DISTR_PRIVATE
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STATIC double logithalf(double p0);
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STATIC double logit(double p);
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STATIC double random_uniform_01(void);
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STATIC double logistic(double x);
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STATIC double cdf_logistic(double x, double mu, double sigma);
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STATIC double sf_logistic(double x, double mu, double sigma);
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STATIC double icdf_logistic(double p, double mu, double sigma);
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STATIC double isf_logistic(double p, double mu, double sigma);
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STATIC double sample_logistic(uint32_t s, double t, double p0);
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STATIC double cdf_log_logistic(double x, double alpha, double beta);
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STATIC double sf_log_logistic(double x, double alpha, double beta);
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STATIC double icdf_log_logistic(double p, double alpha, double beta);
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STATIC double isf_log_logistic(double p, double alpha, double beta);
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STATIC double sample_log_logistic(uint32_t s, double p0);
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STATIC double cdf_weibull(double x, double lambda, double k);
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STATIC double sf_weibull(double x, double lambda, double k);
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STATIC double icdf_weibull(double p, double lambda, double k);
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STATIC double isf_weibull(double p, double lambda, double k);
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STATIC double sample_weibull(uint32_t s, double p0, double lambda, double k);
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STATIC double sample_uniform_interval(double p0, double a, double b);
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STATIC double cdf_genpareto(double x, double mu, double sigma, double xi);
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STATIC double sf_genpareto(double x, double mu, double sigma, double xi);
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STATIC double icdf_genpareto(double p, double mu, double sigma, double xi);
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STATIC double isf_genpareto(double p, double mu, double sigma, double xi);
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STATIC double sample_genpareto(uint32_t s, double p0, double xi);
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#endif
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#endif
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