graph_reader.h

/*
 * Copyright 2016 The George Washington University
 * Written by Hang Liu 
 * Directed by Prof. Howie Huang
 *
 * https://www.seas.gwu.edu/~howie/
 * Contact: iheartgraph@gmail.com
 *
 * 
 * Please cite the following paper:
 * 
 * Hang Liu, H. Howie Huang and Yang Hu. 2016. iBFS: Concurrent Breadth-First Search on GPUs. Proceedings of the 2016 International Conference on Management of Data. ACM. 
 *
 * This file is part of iBFS.
 *
 * iBFS is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * iBFS is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with iBFS.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __GRAPH_READER_H__
#define __GRAPH_READER_H__
#include "comm.h"
#include <iostream>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "wtime.h"
#include <stdint.h>
#include <sys/stat.h>
#include <stdio.h>

inline off_t fsize(const char *filename) {
	struct stat st; 
	if (stat(filename, &st) == 0)
		return st.st_size;
	return -1; 
}


class graph_reader
{
	public:
		index_t *beg_pos;
		vertex_t *csr;
		index_t vert_count;
		index_t edge_count;
		vertex_t *src_list;
		index_t src_count;

	public:
		graph_reader(){};
		~graph_reader(){};
		graph_reader(const char *beg_file, 
				const char *csr_file,
				index_t src_count);

		void gen_src();
		void groupby();
};
#include "graph_reader.cuh"
#endif