forked from freudenreichan/info2Praktikum-NeuronalesNetz
248 lines
6.7 KiB
C
248 lines
6.7 KiB
C
#include "matrix.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
// TODO Matrix-Funktionen implementieren
|
|
/*typedef struct {
|
|
unsigned int rows; //Zeilen
|
|
unsigned int cols; //Spalten
|
|
MatrixType *buffer; //Zeiger auf Speicherbereich Reihen*Spalten
|
|
} Matrix;*/
|
|
Matrix createMatrix(unsigned int rows, unsigned int cols) {
|
|
|
|
Matrix errorMatrix = {0, 0, NULL};
|
|
if (rows == 0 || cols == 0) {
|
|
|
|
return errorMatrix;
|
|
}
|
|
MatrixType *buffer =
|
|
malloc(rows * cols * sizeof(MatrixType)); // Speicher reservieren, malloc
|
|
// liefert Zeiger auf Speicher
|
|
Matrix newMatrix = {rows, cols, buffer}; // neue Matrix nach struct
|
|
return newMatrix;
|
|
}
|
|
void clearMatrix(Matrix *matrix) {
|
|
matrix->buffer = UNDEFINED_MATRIX_VALUE;
|
|
matrix->rows = UNDEFINED_MATRIX_VALUE;
|
|
matrix->cols = UNDEFINED_MATRIX_VALUE;
|
|
free((*matrix).buffer); // Speicher freigeben
|
|
}
|
|
|
|
void setMatrixAt(const MatrixType value, Matrix matrix,
|
|
const unsigned int rowIdx, // Kopie der Matrix wird übergeben
|
|
const unsigned int colIdx) {
|
|
|
|
if (rowIdx >= matrix.rows ||
|
|
colIdx >= matrix.cols) { // Speichergröße nicht überschreiten
|
|
return;
|
|
}
|
|
|
|
matrix.buffer[rowIdx * matrix.cols + colIdx] =
|
|
value; // rowIdx * matrix.cols -> Beginn der Zeile colIdx ->Spalte
|
|
// innerhalb der Zeile
|
|
}
|
|
MatrixType getMatrixAt(const Matrix matrix,
|
|
unsigned int rowIdx, // Kopie der Matrix wird übergeben
|
|
unsigned int colIdx) {
|
|
if (rowIdx >= matrix.rows ||
|
|
colIdx >= matrix.cols) { // Speichergröße nicht überschreiten
|
|
return 0;
|
|
}
|
|
|
|
MatrixType value = matrix.buffer[rowIdx * matrix.cols + colIdx];
|
|
|
|
return value;
|
|
}
|
|
|
|
Matrix broadCastCols(const Matrix matrix, const unsigned int rows,
|
|
const unsigned int cols) {
|
|
|
|
Matrix copy = createMatrix(
|
|
rows, cols); // Matrix 1 Kopie erstellen mit Dimensionen von Matrix2
|
|
for (int r = 0; r < rows; r++) {
|
|
|
|
MatrixType value = getMatrixAt(matrix, r, 0);
|
|
for (int c = 0; c < cols; c++) {
|
|
|
|
setMatrixAt(value, copy, r, c);
|
|
}
|
|
}
|
|
|
|
return copy;
|
|
}
|
|
Matrix broadCastRows(const Matrix matrix, const unsigned int rows,
|
|
const unsigned int cols) {
|
|
|
|
Matrix copy = createMatrix(rows, cols);
|
|
|
|
for (int c = 0; c < cols; c++) {
|
|
MatrixType value = getMatrixAt(matrix, 0, c);
|
|
|
|
for (int r = 0; r < rows; r++) {
|
|
|
|
setMatrixAt(value, copy, r, c);
|
|
}
|
|
}
|
|
|
|
return copy;
|
|
}
|
|
|
|
Matrix add(const Matrix matrix1, const Matrix matrix2) {
|
|
|
|
// Broadcasting nur bei Vektor und Matrix, Fehlermeldung bei zwei unpassenden
|
|
// Matrizen
|
|
|
|
const unsigned int rows1 = matrix1.rows;
|
|
const unsigned int rows2 = matrix2.rows;
|
|
const unsigned int cols1 = matrix1.cols;
|
|
const unsigned int cols2 = matrix2.cols;
|
|
|
|
const int rowsEqual = ((rows1 == rows2) ? 1 : 0);
|
|
|
|
const int colsEqual = ((cols1 == cols2) ? 1 : 0);
|
|
|
|
if (rowsEqual && colsEqual) // addieren
|
|
|
|
{
|
|
Matrix result = createMatrix(rows1, cols1); // Speicher reservieren
|
|
|
|
for (int i = 0; i < (rows1 * cols1); i++) { // addieren
|
|
|
|
result.buffer[i] =
|
|
(matrix1.buffer[i] +
|
|
matrix2.buffer[i]); // buffer[i] ⇔ *(buffer + i) Adresse =
|
|
// Startadresse + (i * sizeof(MatrixType))
|
|
}
|
|
|
|
return result; // zurückgeben
|
|
}
|
|
|
|
else if (rowsEqual && !colsEqual) {
|
|
|
|
if (cols1 == 1) {
|
|
|
|
Matrix result = createMatrix(rows2, cols2);
|
|
|
|
Matrix copy1 = broadCastCols(matrix1, rows2, cols2);
|
|
|
|
for (int i = 0; i < (rows2 * cols2); i++) { // addieren
|
|
|
|
result.buffer[i] =
|
|
(copy1.buffer[i] +
|
|
matrix2.buffer[i]); // buffer[i] ⇔ *(buffer + i) Adresse =
|
|
// Startadresse + (i * sizeof(MatrixType))
|
|
}
|
|
return result;
|
|
|
|
// add und return
|
|
|
|
} else if (cols2 == 1) {
|
|
|
|
Matrix result = createMatrix(rows1, cols1);
|
|
|
|
Matrix copy2 = broadCastCols(matrix2, rows1, cols1);
|
|
|
|
for (int i = 0; i < (rows1 * cols1); i++) { // addieren
|
|
|
|
result.buffer[i] =
|
|
(matrix1.buffer[i] +
|
|
copy2.buffer[i]); // buffer[i] ⇔ *(buffer + i) Adresse =
|
|
// Startadresse + (i * sizeof(MatrixType))
|
|
}
|
|
return result;
|
|
// add und return
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
printf("Fehlermeldung"); // vielleicht Fehlermeldung ändern zu
|
|
// Programmabbruch
|
|
Matrix error = {0, 0, NULL};
|
|
return error;
|
|
}
|
|
|
|
}
|
|
|
|
else if (!rowsEqual && colsEqual) {
|
|
|
|
if (rows1 == 1) {
|
|
|
|
Matrix result = createMatrix(rows2, cols2);
|
|
|
|
Matrix copy1 = broadCastRows(matrix1, rows2, cols2);
|
|
|
|
for (int i = 0; i < (rows2 * cols2); i++) { // addieren
|
|
|
|
result.buffer[i] =
|
|
(copy1.buffer[i] +
|
|
matrix2.buffer[i]); // buffer[i] ⇔ *(buffer + i) Adresse =
|
|
// Startadresse + (i * sizeof(MatrixType))
|
|
}
|
|
return result;
|
|
|
|
// add und return
|
|
|
|
} else if (rows2 == 1) {
|
|
|
|
Matrix result = createMatrix(rows1, cols1);
|
|
|
|
Matrix copy2 = broadCastCols(matrix2, rows1, cols1);
|
|
// add und return
|
|
|
|
for (int i = 0; i < (rows1 * cols1); i++) { // addieren
|
|
|
|
result.buffer[i] =
|
|
(matrix1.buffer[i] +
|
|
copy2.buffer[i]); // buffer[i] ⇔ *(buffer + i) Adresse =
|
|
// Startadresse + (i * sizeof(MatrixType))
|
|
}
|
|
return result;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
printf("Fehlermeldung"); // vielleicht Fehlermeldung ändern zu
|
|
// Programmabbruch
|
|
Matrix error = {0, 0, NULL};
|
|
return error;
|
|
}
|
|
}
|
|
|
|
else {
|
|
printf(
|
|
"Fehlermeldung"); // vielleicht Fehlermeldung ändern zu Programmabbruch
|
|
Matrix error = {0, 0, NULL};
|
|
return error;
|
|
}
|
|
}
|
|
|
|
Matrix multiply(const Matrix matrix1, const Matrix matrix2) {
|
|
// Spalten1 müssen gleich zeilen2 sein! dann multiplizieren
|
|
if (matrix1.cols == matrix2.rows) {
|
|
Matrix multMatrix = createMatrix(matrix1.rows, matrix2.cols);
|
|
// durch neue matrix iterieren
|
|
for (int r = 0; r < matrix1.rows; r++) {
|
|
for (int c = 0; c < matrix2.cols; c++) {
|
|
MatrixType sum = 0.0;
|
|
// skalarprodukte berechnen, k damit die ganze zeile mal die ganze
|
|
// spalte genommen wird quasi
|
|
for (int k = 0; k < matrix1.cols; k++) {
|
|
// sum+=
|
|
// matrix1.buffer[r*matrix1.cols+k]*matrix2.buffer[k*matrix2.cols+c];
|
|
sum += getMatrixAt(matrix1, r, k) * getMatrixAt(matrix2, k, c);
|
|
}
|
|
// Ergebnisse in neue matrix speichern
|
|
setMatrixAt(sum, multMatrix, r, c);
|
|
}
|
|
}
|
|
return multMatrix;
|
|
}
|
|
// sonst fehler, kein multiply möglich
|
|
else {
|
|
Matrix errorMatrix = {0, 0, NULL};
|
|
return errorMatrix;
|
|
}
|
|
} |