int main(void){
int tid; /*this task id */
int bufid, master, bytes, msgtag, source;
char * graph_text = NULL;
int **matrix;
int degree, edges;
int len;
int i;
int greycodeLength;
tid = pvm_mytid(); /*enroll in pvm */
master = pvm_parent(); /*get the master id */
while (1){
/*Get the first graph */
pvm_initsend(PvmDataDefault);
pvm_pkstr(""); /*Just put something in the buffer */
pvm_send(master, MSGREQTASK); /* Request a task */
bufid = pvm_recv(master, MSGTASK); /* Get the task */
pvm_bufinfo(bufid, &bytes, &msgtag, &source); /* Get the size of the text */
graph_text = malloc(bytes);
pvm_upkstr(graph_text); /* Unpack the text */
len = strlen(graph_text);
if(graph_text[len - 1] == '\n')
graph_text[len - 1] = '\0';
matrix = create_matrix(graph_text, °ree); /*Generate the appropriate matrix */
populate_matrix(graph_text, matrix, &edges, degree);
greycodeLength = 1 << degree;
// Initialize code (where the greycode is stored)
int * vals = calloc(2 * greycodeLength, sizeof(int));
int ** code = malloc(greycodeLength * sizeof(int *));
for(i = 0; i < greycodeLength; i++){ /*assign rows within the allocated space */
code[i] = vals + i*2;
}
/*** DO GREYCODE ALGORITHM ON THE MATRIX ***/
if(greycode(degree, matrix, code) == 1){ /*If we found a code */
pvm_initsend(PvmDataDefault);
pvm_pkstr(graph_text);
pvm_send(master, MSGCODE);
} else{ /*Didnt find a code */
pvm_initsend(PvmDataDefault);
pvm_pkstr(graph_text);
pvm_send(master,MSGNOCODE);
}
destroy_matrix(matrix); /* Free the memory associated with the matrix */
destroy_matrix(code);
free(graph_text);
}
pvm_exit();
exit(0);
}
/*
*description: the direct method of
* best square approximation.
*/
Poly* bsa_direct(func f, double a, double b, size_t n)
{
size_t i, j;
Poly* res = NULL;
Matrix* H = create_matrix_n(n + 1);
Matrix* D = create_vector(n + 1);
Matrix* A;
for (i = 0; i < H->m; i++) {
for (j = 0; j < H->n; j++) {
double h = pow(b, i + j + 1) - pow(a, i + j + 1);
H->mem[i][j] = h / (i + j + 1);
}
}
for (i = 0; i < D->m; i++)
D->mem[i][0] = integration(f, a, b, 1e-6);
A = me_gauss_elim(H, D, false);
for (i = 0; i < A->m; i++)
poly_add_inp(&res, create_poly(A->mem[i][0], i));
destroy_matrix(&H);
destroy_matrix(&D);
destroy_matrix(&A);
return res;
}
int main(void) {
int** m;
int num_cols, num_rows;
srand (time(NULL));
printf("How many columns?: ");
scanf("%d", &num_cols);
printf("How many rows?: ");
scanf("%d", &num_rows);
m = create_matrix(num_cols, num_rows);
if (NULL == m) {
exit(-1);
}
random_int_matrix(m, num_cols, num_rows);
print_matrix(m, num_cols, num_rows);
int **transpose = create_matrix(num_rows, num_cols);
if (NULL == transpose) {
exit(-1);
}
transpose_matrix(m, transpose, num_cols, num_rows);
print_matrix(transpose, num_rows, num_cols);
destroy_matrix(m, num_rows);
destroy_matrix(transpose, num_cols);
return 0;
}
int main(void) {
FILE *fin = fopen( "matrix2.in", "r" );
if( fin == NULL ) {
printf( "Error: could not open matrix2.in\n" );
exit( EXIT_FAILURE );
}
Matrix *a = read_matrix( fin );
Matrix *b = read_matrix( fin );
fclose( fin );
Matrix *c = product_matrix( a, b );
FILE *output = fopen( "matrix2.out", "w" );
if( output == NULL ) {
printf( "Error: could not open matrix2.out\n" );
exit( EXIT_FAILURE );
}
print_matrix( output, c );
fclose( output );
destroy_matrix( a );
destroy_matrix( b );
destroy_matrix( c );
return 0;
}
int main() {
Matrix *A = make_matrix(3, 4);
consecutive_matrix(A);
printf("A\n");
print_matrix(A);
Matrix *C = add_matrix_func(A, A);
printf("A + A\n");
print_matrix(C);
Matrix *B = make_matrix(4, 3);
increment_matrix(B, 1);
printf("B\n");
print_matrix(B);
Matrix *D = mult_matrix_func(A, B);
printf("D\n");
print_matrix(D);
destroy_matrix(A);
destroy_matrix(B);
destroy_matrix(C);
destroy_matrix(D);
return 0;
}
/*******************************************************************************
* int LUP_decomposition(matrix_t A, matrix_t* L, matrix_t* U, matrix_t* P)
*
* LUP decomposition with partial pivoting
*******************************************************************************/
int LUP_decomposition(matrix_t A, matrix_t* L, matrix_t* U, matrix_t* P){
int i, j, k, m, index;
float s1, s2, temp;
m = A.cols;
destroy_matrix(L);
destroy_matrix(U);
destroy_matrix(P);
matrix_t Lt, Ut, Pt;
if(!A.initialized){
printf("ERROR: matrix not initialized yet\n");
return -1;
}
if(A.cols != A.rows){
printf("ERROR: matrix is not square\n");
return -1;
}
Lt = create_identity_matrix(m);
Ut = create_square_matrix(m);
Pt = create_identity_matrix(m);
for(i=0;i<m-1;i++){
index = i;
for(j=i;j<m;j++){
if(fabs(A.data[j][i]) >= fabs(A.data[index][i])){
index = j;
}
}
if(index != i){
for(j=0;j<m;j++){
temp = A.data[index][j];
A.data[index][j] = A.data[i][j];
A.data[i][j] = temp;
temp = Pt.data[index][j];
Pt.data[index][j] = Pt.data[i][j];
Pt.data[i][j] = temp;
}
}
}
for(i=0;i<m;i++){
for(j=0;j<m;j++){
s1 = 0;
s2 = 0;
for(k=0;k<i;k++){
s1 += Ut.data[k][j] * Lt.data[i][k];
}
for(k=0;k<j;k++){
s2 += Ut.data[k][j] * Lt.data[i][k];
}
if(j>=i) Ut.data[i][j] = A.data[i][j] - s1;
if(i>=j) Lt.data[i][j] = (A.data[i][j] - s2)/Ut.data[j][j];
}
}
*L = Lt;
*U = Ut;
*P = Pt;
return 0;
}
void multiplicar(int dimension, double *matriz1, double *matriz2) {
matrix_t* matrizA;
matrix_t* matrizB;
matrix_t* producto;
matrizA = (matrix_t*) create_matrix(dimension, dimension);
matrizB = (matrix_t*) create_matrix(dimension, dimension);
load_matrix(matrizA, matriz1);
load_matrix(matrizB, matriz2);
producto = (matrix_t*) matrix_multiply(matrizA, matrizB);
print_matrix(stdout, producto);
destroy_matrix(matrizA);
destroy_matrix(matrizB);
destroy_matrix(producto);
}
int
main(int argc, char *argv[])
{
pclu_context *pclu = pclu_create_context();
printf("\n%s\n", pclu_context_info(pclu));
matrix *aa = create_random_matrix(SIZE, SIZE);
matrix *bb = create_identity_matrix(SIZE, SIZE);
#if PRINT_DATA
printf("Matrix aa:\n");
print_matrix(aa);
printf("\n");
printf("Matrix bb:\n");
print_matrix(bb);
printf("\n");
#endif
timer* tt1 = timer_alloc();
matrix *cc = create_matrix(SIZE, SIZE);
matrix_multiply_cl(pclu, cc, aa, bb);
double tm1 = timer_read(tt1);
timer_free(tt1);
printf("Matrix_multiply_cl took %.04f seconds.\n", tm1);
#if PRINT_DATA
printf("Matrix cc:\n");
print_matrix(cc);
printf("\n");
#endif
timer* tt = timer_alloc();
check_result(aa, cc);
double ct = timer_read(tt);
timer_free(tt);
printf("Check result took %.04f seconds.\n", ct);
destroy_matrix(aa);
destroy_matrix(bb);
pclu_destroy_context(pclu);
return 0;
}
/*
PURPOSE: add matrix to the array of all matrices that have been created during program execution
INPUTS: array of matrices, the new matrix to be added, and the number of matrices
OUTPUTS: the position at which the array was added
*/
unsigned int add_matrix_to_array (Matrix_t** mats, Matrix_t* new_matrix, unsigned int num_mats) {
//TODO ERROR CHECK INCOMING PARAMETERS
if( mats == NULL )
{
printf( "No array of matrices present.\n" );
return -1;
}
if( new_matrix == NULL )
{
printf( "New matrix could not be made.\n" );
return -1;
}
if( num_mats < 1 )
{
printf( "No array of matrices present.\n" );
return -1;
}
static long int current_position = 0;
const long int pos = current_position % num_mats;
if ( mats[pos] ) {
destroy_matrix(&mats[pos]);
}
mats[pos] = new_matrix;
current_position++;
return pos;
}
/***
* Purpose: Add a matrix to the list of matrices. Overwrites old
* matrix if a matrix already exists in the desired location
* Input: The list of matrices,
* the new matrix,
* the number of matrices in the list
* Return: The positon of the new matrix in the list
***/
unsigned int add_matrix_to_array (Matrix_t** mats, Matrix_t* new_matrix, unsigned int num_mats) {
// ERROR CHECK INCOMING PARAMETERS
if(!mats){
printf("No list found\n");
return -1;
}
if(num_mats > 10 || num_mats < 0 ){
printf("Invalid number of matrices\n");
return -1;
}
if(!new_matrix){
printf("No matrix found");
return -1;
}
if(!new_matrix->data){
printf("No data found in new matrix\n");
return -1;
}
static long int current_position = 0;
const long int pos = current_position % num_mats;
if ( mats[pos] ) {
destroy_matrix(&mats[pos]);
}
mats[pos] = new_matrix;
current_position++;
return pos;
}
double determinant(Matrix *m){
Matrix *copy;
unsigned int i, j;
double det, factor;
if(m == NULL)
return -1;
if(m->columns != m->rows)
return -1;
copy = clone(m);
det = 1;
/* reduce each of the rows to get a lower triangle */
for(i = 0; i < copy->columns; i++){
for(j = i + 1; j < copy->rows; j++){
if(copy->numbers[i][i] == 0)
continue;
factor = copy->numbers[i][j]/(copy->numbers[i][i]);
reduce(copy, i, j, factor);
}
}
for(i = 0; i < copy->columns; i++)
det *= copy->numbers[i][i];
destroy_matrix(copy);
return det;
}
/*******************************************************************************
* float matrix_determinant(matrix_t A)
*
*
*******************************************************************************/
float matrix_determinant(matrix_t A){
int i,j,k;
float ratio, det;
if(!A.initialized){
printf("ERROR: matrix not initialized yet\n");
return -1;
}
if (A.rows != A.cols){
printf("Error: Matrix is not square\n");
return -1;
}
matrix_t temp = duplicate_matrix(A);
for(i=0;i<A.rows;i++){
for(j=0;j<A.rows;j++){
if(j>i){
ratio = temp.data[j][i]/temp.data[i][i];
for(k=0;k<A.rows;k++){
temp.data[j][k] = temp.data[j][k] - ratio * temp.data[i][k];
}
}
}
}
det = 1; //storage for determinant
for(i=0;i<A.rows;i++) det = det*temp.data[i][i];
destroy_matrix(&temp);
return det;
}
/*******************************************************************************
* matrix_t invert_matrix(matrix_t A)
*
* Invert Matrix function based on LUP decomposition and then forward and
* backward substitution.
*******************************************************************************/
matrix_t invert_matrix(matrix_t A){
int i,j,k,m;
matrix_t L,U,P,D,temp;
matrix_t out = create_empty_matrix();
if(!A.initialized){
printf("ERROR: matrix not initialized yet\n");
return out;
}
if(A.cols != A.rows){
printf("ERROR: matrix is not square\n");
return out;
}
if(matrix_determinant(A) == 0){
printf("ERROR: matrix is singular, not invertible\n");
return out;
}
m = A.cols;
LUP_decomposition(A,&L,&U,&P);
D = create_identity_matrix(m);
temp = create_square_matrix(m);
for(j=0;j<m;j++){
for(i=0;i<m;i++){
for(k=0;k<i;k++){
D.data[i][j] -= L.data[i][k] * D.data[k][j];
}
}
for(i=m-1;i>=0;i--){ // backwards.. last to first
temp.data[i][j] = D.data[i][j];
for(k=i+1;k<m;k++){
temp.data[i][j] -= U.data[i][k] * temp.data[k][j];
}
temp.data[i][j] = temp.data[i][j] / U.data[i][i];
}
}
// multiply by permutation matrix
out = multiply_matrices(temp, P);
// free allocation
destroy_matrix(&temp);
destroy_matrix(&L);
destroy_matrix(&U);
destroy_matrix(&P);
destroy_matrix(&D);
return out;
}
/*
*purpose: to destroy the remaining matrixes and complete the missing memory
*input: an address to a pointer of type Matrix_t, and an unsigned integer for the number of matrixes
*output:no return value
*/
void destroy_remaining_heap_allocations(Matrix_t **mats, unsigned int num_mats) {
//TODO ERROR CHECK INCOMING PARAMETERS
for (unsigned int i=0; i <num_mats; ++i)
{
destroy_matrix(&mats[i]);
}
// COMPLETE MISSING MEMORY CLEARING HERE
}
int main(int argc, char* argv[]) {
if (argc < 2) {
printf("Parametros: [matriz]\n");
exit(1);
}
even_matrix = new_matrix_from_file(argv[1]);
odd_matrix = clone_matrix(even_matrix);
printf("Arquivo: %s\n", argv[1]);
printf("Calculando [...]\n\n");
pthread_barrier_init(&barrier, NULL, N_THREADS);
pthread_t *ptr_threads = (pthread_t *) malloc (N_THREADS * sizeof(pthread_t));
for (int i = 0; i < N_THREADS; i++) {
Data * sub_matrix = malloc(sizeof(Data));
sub_matrix->lin_min = i * (even_matrix.lin / N_THREADS);
sub_matrix->col_min = i * (even_matrix.col / N_THREADS);
sub_matrix->lin_max = (i + 1) * (even_matrix.lin / N_THREADS) - 1;
sub_matrix->col_max = (i + 1) * (even_matrix.col / N_THREADS) - 1;
pthread_create(&ptr_threads[i], NULL, calc_sor, (void*) sub_matrix);
}
for (int i = 0; i < N_THREADS; i++) {
pthread_join(ptr_threads[i], NULL);
}
pthread_barrier_destroy(&barrier);
Matrix result = merge(even_matrix, odd_matrix);
#ifdef TEST
print_matrix(result);
printf("\n");
#endif
matrix_to_file(result, "result.txt");
printf("Resultado gravado no arquivo: result.txt\n");
destroy_matrix(even_matrix);
destroy_matrix(odd_matrix);
return 1;
};
int main() {
Matrix *A = init_matrix(3, 3);
Matrix *B = init_matrix(3, 2);
(A->values)[0][0] = 0;
(A->values)[0][1] = 1;
(A->values)[0][2] = 2;
(A->values)[1][0] = 3;
(A->values)[1][1] = 4;
(A->values)[1][2] = 5;
(A->values)[2][0] = 1;
(A->values)[2][1] = 1;
(A->values)[2][2] = 1;
(B->values)[0][0] = 0;
(B->values)[0][1] = 1;
(B->values)[1][0] = 2;
(B->values)[1][1] = 3;
(B->values)[2][0] = 4;
(B->values)[2][1] = 5;
print_matrix(A);
print_matrix(B);
Matrix *C = mmult(A, B);
print_matrix(C);
destroy_matrix(A);
destroy_matrix(B);
destroy_matrix(C);
return 0;
}
static Aes
shift_rows(OE oe, Aes aes) {
Aes res = Aes_new(oe);
MATRIX * SR = load_matrix(oe,(byte*)tbl_shift_rows,16,16);
MATRIX * V = load_matrix(oe,aes->state,16,1);
MATRIX * R = matrix_multiplication(SR,V);
uint i = 0;
destroy_matrix(SR);
destroy_matrix(V);
for(i = 0;i < 16;++i) {
res->state[i] = matrix_getentry(R,i,0);
}
destroy_matrix(R);
return res;
}
/*
* PURPOSE: free the memory of matrix list
* INPUTS:
* mats the matrix list
* num_mats the number of matrix in the list
* RETURN: void
* If no errors occurred during destroy then return nothing
* else print error message
**/
void destroy_remaining_heap_allocations(Matrix_t **mats, unsigned int num_mats) {
//TODO ERROR CHECK INCOMING PARAMETERS
if(!(*mats)){
printf("matrix list is empty\n");
return;
}
// COMPLETE MISSING MEMORY CLEARING HERE
for (int i = 0; i < num_mats; ++i){
destroy_matrix(&mats[i]);
}
}
MATRIX * pow3(MATRIX * SR) {
MATRIX * T = 0, * T1 = 0;
T = MM(SR,SR);
T1 = MM(T,SR);
destroy_matrix(T);
return T1;
}
static Aes
mix_columns(OE oe, Aes aes) {
Aes res = Aes_new(oe);
MATRIX * MC = load_matrix(oe,(byte*)tbl_mix_columns,16,16);
MATRIX * V = load_matrix(oe,aes->state,16,1);
MATRIX * R = matrix_multiplication(MC,V);
uint i = 0;
destroy_matrix(MC);
destroy_matrix(V);
for(i = 0;i < 16;++i) {
res->state[i] = matrix_getentry(R,i,0);
}
destroy_matrix(R);
return res;
}
static char *test_compare_matrices()
{
// By default newly create marices have all elements
// equal to 0. So a and b should be equal.
Matrix *a = create_matrix(2, 2);
Matrix *b = create_matrix(2, 2);
mu_assert("a != b", compare_matrices(a, b) == 1);
// Let's modify their values a bit.
a->value[1][1] = 2;
b->value[0][0] = 1;
// They should be not equal now
mu_assert("a == b, should be different", compare_matrices(a, b) == 0);
destroy_matrix(a);
destroy_matrix(b);
return 0;
}
static char *test_add_matrices()
{
// We should create 2 empty matrices. If we add them we should get
// an empty matrix.
Matrix *a = create_matrix(2, 2);
Matrix *b = create_matrix(2, 2);
// We will store the result of the adition in a third matrix c.
Matrix *c = create_matrix(2, 2);
add_matrices(a, b, &c);
// Since a and b are empty their result will an empty matrix too
// so it makes sense to compare c against b or a.
mu_assert("c != a or b", compare_matrices(a, c));
destroy_matrix(a);
destroy_matrix(b);
destroy_matrix(c);
return 0;
}
/*******************************************************************************
* vector_t lin_system_solve_qr(matrix_t A, vector_t b)
*
* Gives a least-squares solution to the system AX=b for non-square A using QR.
*
* Ax=b
* QRx=b
* Rx=Q'b (because Q'Q=I)
* then solve for x with gaussian elimination
*******************************************************************************/
vector_t lin_system_solve_qr(matrix_t A, vector_t b){
vector_t xout = create_empty_vector();
vector_t temp;
matrix_t Q,R;
int i,k;
if(!A.initialized || !b.initialized){
printf("ERROR: matrix or vector not initialized yet\n");
return xout;
}
// do QR decomposition
if(QR_decomposition(A,&Q,&R)<0){
printf("failed to perform QR decomposition on A\n");
return xout;
}
// transpose Q matrix
if(transpose_matrix(&Q)<0){
printf("ERROR: failed to transpose Q\n");
return xout;
}
// multiply through
temp = matrix_times_col_vec(Q,b);
destroy_matrix(&Q);
// solve for x knowing R is upper triangular
int nDim = R.cols;
xout = create_vector(nDim);
for(k=(nDim-1); k>=0; k--){
xout.data[k] = temp.data[k];
for(i=(k+1); i<nDim; i++){
xout.data[k] -= (R.data[k][i]*xout.data[i]);
}
xout.data[k] = xout.data[k] / R.data[k][k];
}
destroy_matrix(&R);
destroy_vector(&temp);
return xout;
}
static char *test_compute_inverse()
{
Matrix *a = create_matrix(3, 3);
// The matrix b will contain the value of the a's inverse.
Matrix *b = create_matrix(3, 3);
b->value[0][0] = -1;
b->value[0][1] = 0.5;
b->value[0][2] = 0;
b->value[1][0] = 0.5;
b->value[1][1] = -1;
b->value[1][2] = 0.5;
b->value[2][0] = 0.3333333;
b->value[2][1] = 0.5;
b->value[2][2] = -0.333333;
for(int i = 0, k = 1; i < 3; i++) {
for(int j = 0; j < 3; j++, k++) {
if(k != 5) {
a->value[i][j] = k;
}
else {
// The matrix that has all the values from 1 to 9 in spiral
// has no inverse, so I replaced the 5 with an four.
a->value[i][j] = 4;
}
}
}
a->determinant = get_determinant(a);
compute_inverse(a);
mu_assert("The invers is not equal to the matrix b", compare_matrices(
a->inverse, b));
destroy_matrix(a);
destroy_matrix(b);
return 0;
}
int main(void) {
matrix_t* m = create_matrix(3, 3);
load_value(m, 0, 0, 1.0);
load_value(m, 0, 1, 2.0);
load_value(m, 0, 2, 3.0);
load_value(m, 1, 0, 4.0);
load_value(m, 1, 1, 5.0);
load_value(m, 1, 2, 6.1);
load_value(m, 2, 0, 3.0);
load_value(m, 2, 1, 2.0);
load_value(m, 2, 2, 1.0);
matrix_t* m1 = create_matrix(3, 3);
load_value(m1, 0, 0, 1.0);
load_value(m1, 0, 1, 0.0);
load_value(m1, 0, 2, 0.0);
load_value(m1, 1, 0, 0.0);
load_value(m1, 1, 1, 1.0);
load_value(m1, 1, 2, 0.0);
load_value(m1, 2, 0, 0.0);
load_value(m1, 2, 1, 0.0);
load_value(m1, 2, 2, 1.0);
print_matrix_std_o(m);
printf("\n");
print_matrix_std_o(m1);
printf("\n");
matrix_t* result = matrix_multiply(m, m1);
print_matrix_std_o(result);
destroy_matrix(m);
destroy_matrix(m1);
destroy_matrix(result);
return EXIT_SUCCESS;
}
void matrix_destroy(matrix_t *p1, matrix_t *p2, matrix_t *p3,
matrix_t *p4, matrix_t *p5, matrix_t *p6,
matrix_t *p7)
{
destroy_matrix(p1);
destroy_matrix(p2);
destroy_matrix(p3);
destroy_matrix(p4);
destroy_matrix(p5);
destroy_matrix(p6);
destroy_matrix(p7);
}
static Aes
shift_row_mix_cols(OE oe, Aes aes) {
MATRIX * state = load_matrix(oe,aes->state,16,1);
//MATRIX * SRMC = load_matrix(oe, (byte*)srmc, 16, 16 );
MATRIX * SR = load_matrix(oe, (byte*)tbl_shift_rows, 16, 16);
MATRIX * MC = load_matrix(oe, (byte*)tbl_mix_columns, 16, 16);
MATRIX * SRMC = matrix_multiplication(MC, SR);
MATRIX * res = matrix_multiplication(SRMC,state);
uint i = 0;
Aes aesres = 0;
destroy_matrix(SR);
destroy_matrix(MC);
destroy_matrix(SRMC);
destroy_matrix(state);
aesres = Aes_new(oe);
for(i = 0;i < 16;++i) {
aesres->state[i] = matrix_getentry(res,i,0);
}
destroy_matrix(res);
return aesres;
}
/*
* Purpose: add_matrix_to_array adds a new matrix to the array of matrices
* where a maximum of 10 matrices exist. Memory deallocation occurs
* when more than 10 matrices are created
* Input: This function takes in the matrix struct pointer, the new
* matrix pointer, and the number of matrices
* Return: It returns the posistion (or index) of the added matrix
*/
unsigned int add_matrix_to_array (Matrix_t** mats, Matrix_t* new_matrix, unsigned int num_mats) {
if(!new_matrix || (num_mats < 0)) {
return -1;
}
static long int current_position = 0;
const long int pos = current_position % num_mats;
if ( mats[pos] ) {
destroy_matrix(&mats[pos]);
}
mats[pos] = new_matrix;
current_position++;
return pos;
}
/*
* PURPOSE: Add a matrix to an array of matrices
* INPUTS: A matrix array mats which is to be added to, a matrix new_matrix which will be added to the array
int num_mats current number of matrix in array
* RETURN: position or index of array after operation
**/
unsigned int add_matrix_to_array (Matrix_t** mats, Matrix_t* new_matrix, unsigned int num_mats) {
//TODO ERROR CHECK INCOMING PARAMETERS
if(!new_matrix)
{
return -1;
}
static long int current_position = 0;
const long int pos = current_position % num_mats;
if ( mats[pos] ) {
destroy_matrix(&mats[pos]);
}
mats[pos] = new_matrix;
current_position++;
return pos;
}
/* m1 x m2 */
Matrix *multiply(Matrix *m1, Matrix *m2){
Matrix *product, *trans;
unsigned int i, j;
if(m1 == NULL || m2 == NULL)
return NULL;
if(m1->columns != m2->rows)
return NULL;
trans = transpose(m1);
product = constructor(m1->rows, m2->columns);
for(i = 0; i < product->columns; i++){
for(j = 0; j < product->rows; j++){
product->numbers[i][j] = vector_multiply(trans->numbers[j], m2->numbers[i], product->rows);
}
}
destroy_matrix(trans);
return product;
}
