mtzikara
6 years ago
committed by
GitHub
1 changed files with 0 additions and 86 deletions
@ -1,86 +0,0 @@ |
|||||
#ifndef SERIAL_GS_PAGERANK_FUNCTIONS_H /* Include guard */ |
|
||||
#define SERIAL_GS_PAGERANK_FUNCTIONS_H |
|
||||
|
|
||||
#include <stdbool.h> |
|
||||
#include <stdio.h> |
|
||||
#include <stdlib.h> |
|
||||
#include <string.h> |
|
||||
#include <math.h> |
|
||||
|
|
||||
/*
|
|
||||
* Constant strings that store the command line options available. |
|
||||
*/ |
|
||||
extern const char *ARGUMENT_CONVERGENCE_TOLERANCE; |
|
||||
extern const char *ARGUMENT_MAX_ITERATIONS; |
|
||||
extern const char *ARGUMENT_DAMPING_FACTOR; |
|
||||
extern const char *ARGUMENT_VERBAL_OUTPUT; |
|
||||
extern const char *ARGUMENT_OUTPUT_HISTORY; |
|
||||
extern const char *ARGUMENT_OUTPUT_FILENAME; |
|
||||
|
|
||||
// This is the numerical base used when parsing the numerical command line
|
|
||||
// arguments.
|
|
||||
extern const int NUMERICAL_BASE; |
|
||||
// Default filename used for the output.
|
|
||||
extern char *DEFAULT_OUTPUT_FILENAME; |
|
||||
|
|
||||
// Declares a data structure to conveniently hold the algorithm's parameters.
|
|
||||
typedef struct parameters { |
|
||||
int numberOfPages, maxIterations; |
|
||||
double convergenceCriterion, dampingFactor; |
|
||||
bool verbose, history; |
|
||||
char *outputFilename, *graphFilename; |
|
||||
} Parameters; |
|
||||
|
|
||||
// Function validUsage outputs the correct way to use the program with command
|
|
||||
// line arguments.
|
|
||||
void validUsage(char *programName); |
|
||||
|
|
||||
// Function checkIncrement is a helper function used in parseArguments (see
|
|
||||
// bellow).
|
|
||||
int checkIncrement(int previousIndex, int maxIndex, char *programName); |
|
||||
|
|
||||
// Function parseArguments parses command line arguments.
|
|
||||
void parseArguments(int argumentCount, char **argumentVector, Parameters *parameters); |
|
||||
|
|
||||
// Function readGraphFromFile loads adjacency matrix, that represents the web
|
|
||||
// graph, stored in the file provided in the command line arguments to the array
|
|
||||
// directedWebGraph.
|
|
||||
void readGraphFromFile(int ***directedWebGraph, Parameters *parameters); |
|
||||
|
|
||||
// Function savePagerankToFile appends or overwrites the pagerank vector
|
|
||||
// "pagerankVector" to the file with the filename supplied in the arguments
|
|
||||
void savePagerankToFile(char *filename, bool append, double *pagerankVector, |
|
||||
int vectorSize); |
|
||||
|
|
||||
// Function generateNormalizedTransitionMatrix generates the normalized
|
|
||||
// transition matrix from the web graph data.
|
|
||||
void generateNormalizedTransitionMatrix(int ***transitionMatrix, |
|
||||
int **directedWebGraph, Parameters parameters); |
|
||||
|
|
||||
// Function transposeMatrix transposes a matrix.
|
|
||||
void transposeMatrix(int ***matrix, int rows, int columns); |
|
||||
|
|
||||
// Function initialize allocates required memory for arrays, reads the dataset
|
|
||||
// from the file and creates the transition probability distribution matrix.
|
|
||||
void initialize( |
|
||||
int ***directedWebGraph, /*This is matrix G (web graph)*/ |
|
||||
int ***transitionMatrix, /*This is matrix A (transition probability distribution matrix)*/ |
|
||||
double **pagerankVector, /*This is the resulting pagerank vector*/ |
|
||||
Parameters *parameters |
|
||||
); |
|
||||
|
|
||||
// Function vectorNorm calculates the first norm of a vector.
|
|
||||
double vectorNorm(double *vector, int vectorSize); |
|
||||
|
|
||||
// Function matrixVectorMultiplication calculates the product of the
|
|
||||
// multiplication between a matrix and the a vector.
|
|
||||
void matrixVectorMultiplication(int **transitionMatrix, double *previousPagerankVector, |
|
||||
double *linksFromConvergedPagesPagerankVector, double *convergedPagerankVector, |
|
||||
double **pagerankVector, int vectorSize, double dampingFactor); |
|
||||
|
|
||||
// Function pagerank iteratively calculates the pagerank of each page until
|
|
||||
// either the convergence criterion is met or the maximum number of iterations
|
|
||||
// is reached.
|
|
||||
int pagerank(int ***transitionMatrix, double **pagerankVector, Parameters parameters); |
|
||||
|
|
||||
#endif // SERIAL_GS_PAGERANK_FUNCTIONS_H
|
|
Loading…
Reference in new issue