You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
92 lines
3.4 KiB
92 lines
3.4 KiB
#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>
|
|
|
|
#include "sparse_matrix.h"
|
|
|
|
#define ANSI_COLOR_RED "\x1B[31m"
|
|
#define ANSI_COLOR_GREEN "\x1B[32m"
|
|
#define ANSI_COLOR_YELLOW "\x1B[33m"
|
|
#define ANSI_COLOR_BLUE "\x1B[34m"
|
|
#define ANSI_COLOR_CYAN "\x1B[36m"
|
|
#define ANSI_COLOR_RESET "\x1B[0m"
|
|
|
|
/*
|
|
* 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;
|
|
|
|
extern const int MAX_PAGE_LINKS_TEXT_SIZE;
|
|
|
|
// 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;
|
|
|
|
//extern typedef SparseMatrixElement;
|
|
//extern typedef SparseMatrix;
|
|
|
|
// 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 generateNormalizedTransitionMatrixFromFile(SparseMatrix *transitionMatrix, 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 initialize allocates required memory for arrays, reads the dataset
|
|
// from the file and creates the transition probability distribution matrix.
|
|
void initialize(
|
|
SparseMatrix *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(SparseMatrix *transitionMatrix,
|
|
double *previousPagerankVector, 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(SparseMatrix *transitionMatrix, double **pagerankVector,
|
|
bool *convergenceStatus, Parameters parameters);
|
|
|
|
#endif // SERIAL_GS_PAGERANK_FUNCTIONS_H
|