clearSeries Funktion implementiert

Startcode/imageInput.c

@@ -6,17 +6,139 @@
 #define BUFFER_SIZE 100
 #define FILE_HEADER_STRING "__info2_image_file_format__"
 
+
 // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
 
 // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
+static int checkFileHeader(FILE *file)
+{
+    char buffer[BUFFER_SIZE] = {0};
+
+    size_t length = strlen(FILE_HEADER_STRING);
+
+    if (length >= BUFFER_SIZE)
+    {
+        return 0;
+    }
+
+    if (fread(buffer, 1, length, file) != length)
+    {
+        return 0;
+    }
+
+    return strcmp(buffer, FILE_HEADER_STRING) == 0;
+}
 GrayScaleImageSeries *readImages(const char *path)
 {
-    GrayScaleImageSeries *series = NULL;
-    
-    return series;
+
+FILE *file = fopen(path, "rb");
+
+if (file == NULL) {
+    return NULL;
+}
+if (!checkFileHeader(file))
+{
+    fclose(file);
+    return NULL;
+}
+unsigned short numberOfImages;
+unsigned short width;
+unsigned short height;
+if (fread(&numberOfImages, sizeof(unsigned short), 1, file) != 1 ||
+    fread(&width, sizeof(unsigned short), 1, file) != 1 ||
+    fread(&height, sizeof(unsigned short), 1, file) != 1)
+{
+    fclose(file);
+    return NULL;
+}
+if (numberOfImages == 0 || width == 0 || height == 0)
+{
+    fclose(file);
+    return NULL;
+}
+GrayScaleImageSeries *series =
+    calloc(1, sizeof(GrayScaleImageSeries));
+
+
+if (series == NULL)
+{
+    fclose(file);
+    return NULL;
+}
+
+series->count = numberOfImages;
+series->images =
+    calloc(numberOfImages, sizeof(GrayScaleImage));
+
+series->labels =
+    calloc(numberOfImages, sizeof(unsigned char));
+    if (series->images == NULL || series->labels == NULL)
+{
+    clearSeries(series);
+    fclose(file);
+    return NULL;
+}
+for (unsigned int i = 0; i < numberOfImages; i++)
+{
+    GrayScaleImage *image = &series->images[i];
+
+    image->width = width;
+    image->height = height;
+
+    image->buffer = malloc(
+        (size_t)width * height * sizeof(GrayScalePixelType)
+    );
+
+    if (image->buffer == NULL)
+    {
+        clearSeries(series);
+        fclose(file);
+        return NULL;
+    }
+
+    if (fread(image->buffer,
+              sizeof(GrayScalePixelType),
+              (size_t)width * height,
+              file) != (size_t)width * height)
+    {
+        clearSeries(series);
+        fclose(file);
+        return NULL;
+    }
+
+    if (fread(&series->labels[i],
+              sizeof(unsigned char),
+              1,
+              file) != 1)
+    {
+        clearSeries(series);
+        fclose(file);
+        return NULL;
+    }
+}
+fclose(file);
+return series;
+
 }
 
 // TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
 void clearSeries(GrayScaleImageSeries *series)
 {
-}
+
+    if (series == NULL)
+    {
+        return;
+    }
+
+    if (series->images != NULL)
+    {
+        for (unsigned int i = 0; i < series->count; i++)
+        {
+            free(series->images[i].buffer);
+        }
+    }
+
+    free(series->images);
+    free(series->labels);
+    free(series);
+}

Startcode/matrix.c

@@ -44,24 +44,92 @@ void clearMatrix(Matrix *matrix)
     matrix->cols = 0;
 
 
+
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+if (matrix.buffer == NULL ||
+        rowIdx >= matrix.rows ||
+        colIdx >= matrix.cols) {
+        return;
+    }
+ matrix.buffer[rowIdx * matrix.cols + colIdx] = value;
+
+
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    if (matrix.buffer == NULL ||
+           rowIdx >= matrix.rows ||
+           colIdx >= matrix.cols) {
+        return UNDEFINED_MATRIX_VALUE;
+           }
+
+    return matrix.buffer[rowIdx * matrix.cols + colIdx];
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    
+
+    if (matrix1.rows != matrix2.rows ||
+           (matrix1.cols != matrix2.cols &&
+            matrix1.cols != 1 &&
+            matrix2.cols != 1)) {
+        return createMatrix(0, 0);
+            }
+
+    // Ungültige Eingabematrizen abfangen
+    if (matrix1.buffer == NULL || matrix2.buffer == NULL) {
+        return createMatrix(0, 0);
+    }
+
+    // Größere Spaltenanzahl bestimmen
+    unsigned int cols = matrix1.cols > matrix2.cols
+                        ? matrix1.cols : matrix2.cols;
+
+    Matrix result = createMatrix(matrix1.rows, cols);
+
+    if (result.buffer == NULL) {
+        return result;
+    }
+
+    for (unsigned int i = 0; i < result.rows; i++) {
+        for (unsigned int j = 0; j < result.cols; j++) {
+
+            // Bei einer Spalte immer Spalte 0 verwenden
+            unsigned int j1 = matrix1.cols == 1 ? 0 : j;
+            unsigned int j2 = matrix2.cols == 1 ? 0 : j;
+
+            result.buffer[i * result.cols + j] =
+                matrix1.buffer[i * matrix1.cols + j1] +
+                matrix2.buffer[i * matrix2.cols + j2];
+        }
+    }
+
+    return result;
+
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    
+if (matrix1.cols != matrix2.rows) {
+        return createMatrix(0, 0);
+    }
+
+    // Ergebnismatrix erstellen
+    Matrix result = createMatrix(matrix1.rows, matrix2.cols);
+
+    // Matrizen multiplizieren
+    for (unsigned int rowIdx = 0; rowIdx < matrix1.rows; rowIdx++) {
+        for (unsigned int colIdx = 0; colIdx < matrix2.cols; colIdx++) {
+            for (unsigned int k = 0; k < matrix1.cols; k++) {
+      result.buffer[rowIdx * result.cols + colIdx] +=
+    matrix1.buffer[rowIdx * matrix1.cols + k] *
+    matrix2.buffer[k * matrix2.cols + colIdx];
+}
+}
+}
+return result;
 }