starpu-max/examples/spmv/matrix_market/mm_to_bcsr.h

/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2008-2021  Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
 *
 * StarPU is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * StarPU 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 Lesser General Public License in COPYING.LGPL for more details.
 */
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "mmio.h"

/* convert a matrix stored in a file with the matrix market format into the 
 * BCSR format */

typedef struct tmp_block
{
	/* we have a linked list of blocks */
	struct tmp_block *next;

	/* column i, row j*/
	unsigned i, j;
	
	float *val;

} tmp_block_t;

typedef struct
{
	unsigned r,c;
	unsigned nnz_blocks;
	unsigned nrows_blocks;

	float *val;
	uint32_t *colind;
	uint32_t *rowptr;
} bcsr_t;


/* directly read input from a file */
bcsr_t *mm_file_to_bcsr(char *filename, unsigned c, unsigned r);

/* read the matrix as a set of valuated coordinates */
bcsr_t *mm_to_bcsr(unsigned nz, unsigned *I_, unsigned *J, float *val, unsigned c, unsigned r);