96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/**
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* Copyright (c) 2012 MIT License by 6.172 Staff
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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**/
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#include "./matrix_multiply.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <math.h>
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#include <string.h>
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// #include "./tbassert.h"
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// Allocates a row-by-cols matrix and returns it
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matrix* make_matrix(int rows, int cols) {
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matrix* new_matrix = malloc(sizeof(matrix));
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// Set the number of rows and columns
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new_matrix->rows = rows;
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new_matrix->cols = cols;
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// Allocate a buffer big enough to hold the matrix.
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new_matrix->values = (int**)malloc(sizeof(int*) * rows);
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for (int i = 0; i < rows; i++) {
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new_matrix->values[i] = (int*)malloc(sizeof(int) * cols);
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}
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return new_matrix;
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}
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// Frees an allocated matrix
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void free_matrix(matrix* m) {
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for (int i = 0; i < m->rows; i++) {
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free(m->values[i]);
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}
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free(m->values);
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free(m);
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}
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// Print matrix
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void print_matrix(const matrix* m) {
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printf("------------\n");
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for (int i = 0; i < m->rows; i++) {
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for (int j = 0; j < m->cols; j++) {
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printf(" %3d ", m->values[i][j]);
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}
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printf("\n");
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}
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printf("------------\n");
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}
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// Multiply matrix A*B, store result in C.
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int matrix_multiply_run(const matrix* A, const matrix* B, matrix* C) {
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/*
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tbassert(A->cols == B->rows,
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"A->cols = %d, B->rows = %d\n", A->cols, B->rows);
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tbassert(A->rows == C->rows,
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"A->rows = %d, C->rows = %d\n", A->rows, C->rows);
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tbassert(B->cols == C->cols,
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"B->cols = %d, C->cols = %d\n", B->cols, C->cols);
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*/
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for (int i = 0; i < A->rows; i++) {
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for (int j = 0; j < B->cols; j++) {
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for (int k = 0; k < A->cols; k++) {
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C->values[i][j] += A->values[i][k] * B->values[k][j];
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}
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}
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}
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return 0;
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}
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