400 lines
7.8 KiB
C++
400 lines
7.8 KiB
C++
#ifndef HORUS_UTIL_H
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#define HORUS_UTIL_H
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#include <cmath>
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#include <cassert>
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#include <limits>
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#include <algorithm>
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#include <vector>
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#include <set>
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#include <queue>
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#include <unordered_map>
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#include <sstream>
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#include <iostream>
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#include "Horus.h"
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using namespace std;
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namespace {
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const double NEG_INF = -numeric_limits<double>::infinity();
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};
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namespace Util {
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template <typename T> void addToVector (vector<T>&, const vector<T>&);
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template <typename T> void addToSet (set<T>&, const vector<T>&);
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template <typename T> void addToQueue (queue<T>&, const vector<T>&);
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template <typename T> bool contains (const vector<T>&, const T&);
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template <typename T> bool contains (const set<T>&, const T&);
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template <typename K, typename V> bool contains (
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const unordered_map<K, V>&, const K&);
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template <typename T> size_t indexOf (const vector<T>&, const T&);
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template <typename T> void log (vector<T>&);
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template <typename T> void exp (vector<T>&);
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template <typename T> string elementsToString (
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const vector<T>& v, string sep = " ");
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template <typename T> std::string toString (const T&);
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template <> std::string toString (const bool&);
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double logSum (double, double);
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void add (Params&, const Params&, unsigned);
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void multiply (Params&, const Params&, unsigned);
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unsigned maxUnsigned (void);
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unsigned stringToUnsigned (string);
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double stringToDouble (string);
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double factorial (unsigned);
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double logFactorial (unsigned);
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unsigned nrCombinations (unsigned, unsigned);
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size_t sizeExpected (const Ranges&);
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unsigned nrDigits (int);
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bool isInteger (const string&);
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string parametersToString (const Params&, unsigned = Constants::PRECISION);
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vector<string> getStateLines (const Vars&);
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bool setHorusFlag (string key, string value);
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void printHeader (string, std::ostream& os = std::cout);
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void printSubHeader (string, std::ostream& os = std::cout);
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void printAsteriskLine (std::ostream& os = std::cout);
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void printDashedLine (std::ostream& os = std::cout);
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};
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template <typename T> void
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Util::addToVector (vector<T>& v, const vector<T>& elements)
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{
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v.insert (v.end(), elements.begin(), elements.end());
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}
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template <typename T> void
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Util::addToSet (set<T>& s, const vector<T>& elements)
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{
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s.insert (elements.begin(), elements.end());
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}
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template <typename T> void
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Util::addToQueue (queue<T>& q, const vector<T>& elements)
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{
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for (size_t i = 0; i < elements.size(); i++) {
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q.push (elements[i]);
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}
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}
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template <typename T> bool
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Util::contains (const vector<T>& v, const T& e)
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{
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return std::find (v.begin(), v.end(), e) != v.end();
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}
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template <typename T> bool
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Util::contains (const set<T>& s, const T& e)
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{
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return s.find (e) != s.end();
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}
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template <typename K, typename V> bool
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Util::contains (const unordered_map<K, V>& m, const K& k)
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{
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return m.find (k) != m.end();
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}
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template <typename T> size_t
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Util::indexOf (const vector<T>& v, const T& e)
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{
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return std::distance (v.begin(),
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std::find (v.begin(), v.end(), e));
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}
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template <typename T> void
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Util::log (vector<T>& v)
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{
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transform (v.begin(), v.end(), v.begin(), ::log);
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}
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template <typename T> void
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Util::exp (vector<T>& v)
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{
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transform (v.begin(), v.end(), v.begin(), ::exp);
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}
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template <typename T> string
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Util::elementsToString (const vector<T>& v, string sep)
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{
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stringstream ss;
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for (size_t i = 0; i < v.size(); i++) {
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ss << ((i != 0) ? sep : "") << v[i];
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}
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return ss.str();
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}
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template <typename T> std::string
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Util::toString (const T& t)
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{
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std::stringstream ss;
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ss << t;
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return ss.str();
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}
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inline double
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Util::logSum (double x, double y)
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{
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// std::log (std::exp (x) + std::exp (y)) can overflow!
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assert (std::isnan (x) == false);
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assert (std::isnan (y) == false);
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if (x == NEG_INF) {
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return y;
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}
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if (y == NEG_INF) {
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return x;
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}
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// if one value is much smaller than the other,
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// keep the larger value
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const double tol = 460.517; // log (1e200)
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if (x < y - tol) {
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return y;
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}
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if (y < x - tol) {
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return x;
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}
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assert (std::isnan (x - y) == false);
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const double exp_diff = std::exp (x - y);
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if (std::isfinite (exp_diff) == false) {
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// difference is too large
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return x > y ? x : y;
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}
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// otherwise return the sum
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return y + std::log (static_cast<double>(1.0) + exp_diff);
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}
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inline void
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Util::add (Params& v1, const Params& v2, unsigned repetitions)
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{
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for (size_t count = 0; count < v1.size(); ) {
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for (size_t i = 0; i < v2.size(); i++) {
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for (unsigned r = 0; r < repetitions; r++) {
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v1[count] += v2[i];
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count ++;
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}
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}
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}
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}
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inline void
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Util::multiply (Params& v1, const Params& v2, unsigned repetitions)
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{
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for (size_t count = 0; count < v1.size(); ) {
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for (size_t i = 0; i < v2.size(); i++) {
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for (unsigned r = 0; r < repetitions; r++) {
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v1[count] *= v2[i];
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count ++;
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}
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}
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}
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}
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inline unsigned
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Util::maxUnsigned (void)
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{
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return numeric_limits<unsigned>::max();
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}
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namespace LogAware {
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inline double one() { return Globals::logDomain ? 0.0 : 1.0; }
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inline double zero() { return Globals::logDomain ? NEG_INF : 0.0; }
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inline double addIdenty() { return Globals::logDomain ? NEG_INF : 0.0; }
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inline double multIdenty() { return Globals::logDomain ? 0.0 : 1.0; }
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inline double withEvidence() { return Globals::logDomain ? 0.0 : 1.0; }
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inline double noEvidence() { return Globals::logDomain ? NEG_INF : 0.0; }
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inline double log (double v) { return Globals::logDomain ? ::log (v) : v; }
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inline double exp (double v) { return Globals::logDomain ? ::exp (v) : v; }
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void normalize (Params&);
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double getL1Distance (const Params&, const Params&);
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double getMaxNorm (const Params&, const Params&);
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double pow (double, unsigned);
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double pow (double, double);
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void pow (Params&, unsigned);
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void pow (Params&, double);
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};
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template <typename T>
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void operator+=(std::vector<T>& v, double val)
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{
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std::transform (v.begin(), v.end(), v.begin(),
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std::bind1st (plus<double>(), val));
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}
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template <typename T>
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void operator-=(std::vector<T>& v, double val)
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{
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std::transform (v.begin(), v.end(), v.begin(),
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std::bind1st (minus<double>(), val));
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}
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template <typename T>
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void operator*=(std::vector<T>& v, double val)
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{
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std::transform (v.begin(), v.end(), v.begin(),
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std::bind1st (multiplies<double>(), val));
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}
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template <typename T>
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void operator/=(std::vector<T>& v, double val)
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{
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std::transform (v.begin(), v.end(), v.begin(),
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std::bind1st (divides<double>(), val));
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}
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template <typename T>
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void operator+=(std::vector<T>& a, const std::vector<T>& b)
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{
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assert (a.size() == b.size());
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std::transform (a.begin(), a.end(), b.begin(), a.begin(),
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plus<double>());
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}
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template <typename T>
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void operator-=(std::vector<T>& a, const std::vector<T>& b)
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{
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assert (a.size() == b.size());
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std::transform (a.begin(), a.end(), b.begin(), a.begin(),
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minus<double>());
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}
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template <typename T>
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void operator*=(std::vector<T>& a, const std::vector<T>& b)
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{
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assert (a.size() == b.size());
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std::transform (a.begin(), a.end(), b.begin(), a.begin(),
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multiplies<double>());
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}
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template <typename T>
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void operator/=(std::vector<T>& a, const std::vector<T>& b)
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{
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assert (a.size() == b.size());
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std::transform (a.begin(), a.end(), b.begin(), a.begin(),
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divides<double>());
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}
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template <typename T>
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void operator^=(std::vector<T>& v, double exp)
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{
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std::transform (v.begin(), v.end(), v.begin(),
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std::bind2nd (ptr_fun<double, double, double> (std::pow), exp));
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}
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template <typename T>
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void operator^=(std::vector<T>& v, int iexp)
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{
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std::transform (v.begin(), v.end(), v.begin(),
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std::bind2nd (ptr_fun<double, int, double> (std::pow), iexp));
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}
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template <typename T>
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std::ostream& operator << (std::ostream& os, const vector<T>& v)
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{
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os << "[" ;
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os << Util::elementsToString (v, ", ");
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os << "]" ;
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return os;
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}
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#endif // HORUS_UTIL_H
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