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5
.idea/misc.xml
generated
5
.idea/misc.xml
generated
@ -5,6 +5,11 @@
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<option name="linkedExternalProjectsSettings">
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<option name="linkedExternalProjectsSettings">
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<MakefileProjectSettings>
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<MakefileProjectSettings>
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<option name="externalProjectPath" value="$PROJECT_DIR$" />
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<option name="externalProjectPath" value="$PROJECT_DIR$" />
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<option name="modules">
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<set>
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<option value="$PROJECT_DIR$" />
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</set>
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</option>
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<option name="version" value="2" />
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<option name="version" value="2" />
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</MakefileProjectSettings>
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</MakefileProjectSettings>
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</option>
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</option>
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35
matrix.c
35
matrix.c
@ -13,7 +13,7 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
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if(rows==0 || cols==0){
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if(rows==0 || cols==0){
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m.rows = 0;
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m.rows = 0;
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m.cols = 0;
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m.cols = 0;
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m.buffer = NULL;
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m.buffer = NULL; //kein gültiger Speicher
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return m;
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return m;
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}
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}
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@ -25,7 +25,7 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
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return m;
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return m;
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}
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}
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void clearMatrix(Matrix *matrix)
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void clearMatrix(Matrix *matrix) //um Matrix wieder aufzuräumen
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{
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{
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// falls Speicher existiert (buffer NICHT NULL ist): freigeben
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// falls Speicher existiert (buffer NICHT NULL ist): freigeben
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if(matrix->buffer != NULL)
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if(matrix->buffer != NULL)
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@ -54,11 +54,11 @@ void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned
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matrix.buffer[index] = value;
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matrix.buffer[index] = value;
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}
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}
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MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx) //liest wert an bestimmter Pos.
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{
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{
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if (matrix.buffer == NULL || rowIdx >= matrix.rows || colIdx >= matrix.cols)
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if (matrix.buffer == NULL || rowIdx >= matrix.rows || colIdx >= matrix.cols)
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{
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{
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return 0;
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return 0; //funktioniert nur wegen #define UNDEFINED_MATRIX_VALUE 0 in matrix.h
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}
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}
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unsigned int index = rowIdx * matrix.cols + colIdx;
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unsigned int index = rowIdx * matrix.cols + colIdx;
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@ -71,7 +71,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
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Matrix result;
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Matrix result;
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//Zeilen müssen gleich sein
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//Zeilen müssen gleich sein
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if (matrix1.rows != matrix2.rows)
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if (matrix1.rows != matrix2.rows) //Wenn nicht gleich, dann ungültige Matrix zurückgeben
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{
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{
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result.rows = 0;
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result.rows = 0;
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result.cols = 0;
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result.cols = 0;
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@ -83,22 +83,28 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
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//Spalten müssen gleich sein (mit broadcasting)
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//Spalten müssen gleich sein (mit broadcasting)
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//Fälle: gleiche Spalten ok, matrix1 hat 1 Spalte, matrix2 hat 1 Spalte
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//Fälle: gleiche Spalten ok, matrix1 hat 1 Spalte, matrix2 hat 1 Spalte
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//sonst inkompatibel
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//sonst inkompatibel
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//Broadcasting --> 3x1 + 3x4 ist möglich, da 3x1 zu 3x4 wird und die erste Spalte einfach kopiert wird in andere Spalten
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if (matrix1.cols != matrix2.cols && matrix1.cols != 1 && matrix2.cols != 1)
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if (matrix1.cols != matrix2.cols && matrix1.cols != 1 && matrix2.cols != 1)
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{
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{ //keine Bedingung erfüllt --> Addition nicht möglich
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result.rows = 0;
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result.rows = 0;
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result.cols = 0;
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result.cols = 0;
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result.buffer = NULL;
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result.buffer = NULL;
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return result;
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return result;
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}
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}
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//Ergebnis dimension bestimmen
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//Zeilen sind immer die gleichen wie bei den Inputs
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result.rows = matrix1.rows;
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result.rows = matrix1.rows;
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//Broadcasting Überprüft --> nimmt immer die grössere Spalte der beiden Matrizen
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result.cols = (matrix1.cols > matrix2.cols) ? matrix1.cols : matrix2.cols;
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result.cols = (matrix1.cols > matrix2.cols) ? matrix1.cols : matrix2.cols;
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//Speicher reservieren für Ergebnis-Matrix
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result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
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result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
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for (unsigned int r = 0; r < result.rows; r++)
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//Addition mit Broadcasting
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for (unsigned int r = 0; r < result.rows; r++) //jede Zeile durchlaufen
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{
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{
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for (unsigned int c = 0; c < result.cols; c++)
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for (unsigned int c = 0; c < result.cols; c++) //jede Spalte durchlaufen
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{
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{
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// Bestimme Spalte für matrix1:
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// Bestimme Spalte für matrix1:
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// Wenn nur 1 Spalte -> immer Spalte 0 benutzen
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// Wenn nur 1 Spalte -> immer Spalte 0 benutzen
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@ -107,9 +113,11 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
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// Bestimme Spalte für matrix2:
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// Bestimme Spalte für matrix2:
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unsigned int c2 = (matrix2.cols == 1) ? 0 : c;
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unsigned int c2 = (matrix2.cols == 1) ? 0 : c;
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// Werte aus beiden Matrizen holen
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MatrixType v1 = getMatrixAt(matrix1, r, c1);
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MatrixType v1 = getMatrixAt(matrix1, r, c1);
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MatrixType v2 = getMatrixAt(matrix2, r, c2);
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MatrixType v2 = getMatrixAt(matrix2, r, c2);
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//Beide Werte addieren und in result speichern
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setMatrixAt(v1 + v2, result, r, c);
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setMatrixAt(v1 + v2, result, r, c);
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}
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}
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}
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}
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@ -122,6 +130,7 @@ Matrix multiply(const Matrix matrix1, const Matrix matrix2)
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{
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{
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Matrix result;
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Matrix result;
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//Matrixmultiplikation: innere Dimensionen müssen übereinstimmen
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if(matrix1.cols != matrix2.rows)
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if(matrix1.cols != matrix2.rows)
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{
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{
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result.rows = 0;
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result.rows = 0;
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@ -130,12 +139,14 @@ Matrix multiply(const Matrix matrix1, const Matrix matrix2)
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return result;
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return result;
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}
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}
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//Größe der Ergebnismatrix bestimmen
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result.rows = matrix1.rows;
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result.rows = matrix1.rows;
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result.cols = matrix2.cols;
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result.cols = matrix2.cols;
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//Speicher für Ergebnis
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result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
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result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
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//Matrixmultiplikation durchführen
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for (unsigned int r = 0; r < result.rows; r++)
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for (unsigned int r = 0; r < result.rows; r++)
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{
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{
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for (unsigned int c = 0; c < result.cols; c++)
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for (unsigned int c = 0; c < result.cols; c++)
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@ -150,7 +161,7 @@ Matrix multiply(const Matrix matrix1, const Matrix matrix2)
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sum += a * b;
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sum += a * b;
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}
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}
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//Summe in Ergebniszelle schreiben
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setMatrixAt(sum, result, r, c);
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setMatrixAt(sum, result, r, c);
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}
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}
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}
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}
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4
matrix.h
4
matrix.h
@ -6,10 +6,12 @@
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typedef float MatrixType;
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typedef float MatrixType;
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// TODO Matrixtyp definieren
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// TODO Matrixtyp definieren
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typedef struct {
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typedef struct {
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unsigned int rows;
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unsigned int rows;
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unsigned int cols;
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unsigned int cols;
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MatrixType* buffer; //buffer Pointer zeigt auf Heap, mit malloc dort dann Speicher reservieren
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MatrixType* buffer; //Zeiger auf dynamisch reservierten Speicher, damit Matrix beliebig groß zur Laufzeit
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} Matrix;
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} Matrix;
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