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/*
Copyright (c) 2012-2023, Intel Corporation
SPDX-License-Identifier: BSD-3-Clause
*/
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif
/**************************************************************\
| Includes
\**************************************************************/
#include "matrix.h"
#include "matrix_ispc.h"
extern "C" {
#include "mmio.h"
}
/**************************************************************\
| DenseMatrix methods
\**************************************************************/
void DenseMatrix::multiply(const Vector &v, Vector &r) const {
// Dimensionality check
ASSERT(v.size() == cols());
ASSERT(r.size() == rows());
for (size_t i = 0; i < rows(); i++)
r[i] = v.dot(entries + i * num_cols);
}
const Vector *DenseMatrix::row(size_t row) const { return new Vector(num_cols, entries + row * num_cols, true); }
void DenseMatrix::row(size_t row, Vector &r) {
r.entries = entries + row * cols();
r._size = cols();
}
void DenseMatrix::set_row(size_t row, const Vector &v) {
ASSERT(v.size() == num_cols);
memcpy(entries + row * num_cols, v.entries, num_cols * sizeof(double));
}
/**************************************************************\
| CRSMatrix Methods
\**************************************************************/
#include <algorithm>
#include <stdio.h>
#include <stdlib.h>
#include <vector>
struct entry {
int row;
int col;
double val;
};
bool compare_entries(struct entry i, struct entry j) {
if (i.row < j.row)
return true;
if (i.row > j.row)
return false;
return i.col < j.col;
}
#define ERR_OUT(...) \
do { \
fprintf(stderr, __VA_ARGS__); \
return nullptr; \
} while(0)
#define ERR_OUT_WITH_CLOSE(file, ...) \
do { \
fclose(file); \
ERR_OUT(__VA_ARGS__); \
} while(0)
CRSMatrix *CRSMatrix::matrix_from_mtf(char *path) {
FILE *f;
MM_typecode matcode;
int m, n, nz;
if ((f = fopen(path, "r")) == nullptr)
ERR_OUT("Error: %s does not name a valid/readable file.\n", path);
if (mm_read_banner(f, &matcode) != 0)
ERR_OUT_WITH_CLOSE(f, "Error: Could not process Matrix Market banner.\n");
if (mm_is_complex(matcode))
ERR_OUT_WITH_CLOSE(f, "Error: Application does not support complex numbers.\n");
if (mm_is_dense(matcode))
ERR_OUT_WITH_CLOSE(f, "Error: supplied matrix is dense (should be sparse.)\n");
if (!mm_is_matrix(matcode))
ERR_OUT_WITH_CLOSE(f, "Error: %s does not encode a matrix.\n", path);
if (mm_read_mtx_crd_size(f, &m, &n, &nz) != 0)
ERR_OUT_WITH_CLOSE(f, "Error: could not read matrix size from file.\n");
if (m != n)
ERR_OUT_WITH_CLOSE(f, "Error: Application does not support non-square matrices.");
std::vector<struct entry> entries;
entries.resize(nz);
for (int i = 0; i < nz; i++) {
if (3 != fscanf(f, "%d %d %lg\n", &entries[i].row, &entries[i].col, &entries[i].val)) {
printf("Couldn't read input correctly\n");
exit(-1);
}
// Adjust from 1-based to 0-based
entries[i].row--;
entries[i].col--;
}
sort(entries.begin(), entries.end(), compare_entries);
CRSMatrix *M = new CRSMatrix(m, n, nz);
int cur_row = -1;
for (int i = 0; i < nz; i++) {
while (entries[i].row > cur_row)
M->row_offsets[++cur_row] = i;
M->entries[i] = entries[i].val;
M->columns[i] = entries[i].col;
}
fclose(f);
return M;
}
Vector *Vector::vector_from_mtf(char *path) {
FILE *f;
MM_typecode matcode;
int m, n, nz;
if ((f = fopen(path, "r")) == nullptr)
ERR_OUT("Error: %s does not name a valid/readable file.\n", path);
if (mm_read_banner(f, &matcode) != 0)
ERR_OUT_WITH_CLOSE(f, "Error: Could not process Matrix Market banner.\n");
if (mm_is_complex(matcode))
ERR_OUT_WITH_CLOSE(f, "Error: Application does not support complex numbers.\n");
if (mm_is_dense(matcode)) {
if (mm_read_mtx_array_size(f, &m, &n) != 0)
ERR_OUT_WITH_CLOSE(f, "Error: could not read matrix size from file.\n");
} else {
if (mm_read_mtx_crd_size(f, &m, &n, &nz) != 0)
ERR_OUT_WITH_CLOSE(f, "Error: could not read matrix size from file.\n");
}
if (n != 1)
ERR_OUT_WITH_CLOSE(f, "Error: %s does not describe a vector.\n", path);
Vector *x = new Vector(m);
if (mm_is_dense(matcode)) {
double val;
for (int i = 0; i < m; i++) {
if (1 != fscanf(f, "%lg\n", &val)) {
printf("Couldn't read input correctly\n");
exit(-1);
}
(*x)[i] = val;
}
} else {
x->zero();
double val;
int row;
int col;
for (int i = 0; i < nz; i++) {
if (3 != fscanf(f, "%d %d %lg\n", &row, &col, &val)) {
printf("Couldn't read input correctly\n");
exit(-1);
}
(*x)[row - 1] = val;
}
}
fclose(f);
return x;
}
#define ERR(...) \
{ \
fprintf(stderr, __VA_ARGS__); \
exit(-1); \
}
void Vector::to_mtf(char *path) {
FILE *f;
MM_typecode matcode;
mm_initialize_typecode(&matcode);
mm_set_matrix(&matcode);
mm_set_real(&matcode);
mm_set_dense(&matcode);
mm_set_general(&matcode);
if ((f = fopen(path, "w")) == nullptr)
ERR("Error: cannot open/write to %s\n", path);
mm_write_banner(f, matcode);
mm_write_mtx_array_size(f, size(), 1);
for (size_t i = 0; i < size(); i++)
fprintf(f, "%lg\n", entries[i]);
fclose(f);
}
void CRSMatrix::multiply(const Vector &v, Vector &r) const {
ASSERT(v.size() == cols());
ASSERT(r.size() == rows());
for (size_t row = 0; row < rows(); row++) {
int row_offset = row_offsets[row];
int next_offset = ((row + 1 == rows()) ? _nonzeroes : row_offsets[row + 1]);
double sum = 0;
for (int i = row_offset; i < next_offset; i++) {
sum += v[columns[i]] * entries[i];
}
r[row] = sum;
}
}
void CRSMatrix::zero() {
entries.clear();
row_offsets.clear();
columns.clear();
_nonzeroes = 0;
}
|
