matrix.c aenderungen

.gitignore

@@ -2,3 +2,9 @@ mnist
 runTests
 *.o
 *.exe
+.vscode/settings.json
+.vscode/launch.json
+.vscode/settings.json
+.vscode/settings.json
+runImageInputTests
+testFile.info2

imageInput.c

@@ -1,29 +1,136 @@
+#include "imageInput.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include "imageInput.h"
 
-#define BUFFER_SIZE 100
 #define FILE_HEADER_STRING "__info2_image_file_format__"
+// define BUFFER 100
+// 10x10 pixel
 
-// TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
-GrayScaleImage readImage()
-{
-
+/* ----------------------------------------------------------
+   1. Header prüfen
+   ---------------------------------------------------------- */
+static int readHeader(FILE *file) {
+  char header[sizeof(FILE_HEADER_STRING)];
+  if (fread(header, 1, sizeof(FILE_HEADER_STRING) - 1, file) !=
+      sizeof(FILE_HEADER_STRING) - 1)
+    return 0;
+  header[sizeof(FILE_HEADER_STRING) - 1] = '\0';
+  return strcmp(header, FILE_HEADER_STRING) == 0;
 }
 
-// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
-GrayScaleImageSeries *readImages(const char *path)
-{
-    GrayScaleImageSeries *series = NULL;
-    FILE *file = fopen("mnist_test.info2","rb");
-    char headOfFile;
-    series = malloc();
+/* ----------------------------------------------------------
+   2. Meta-Daten lesen (unsigned short)
+   ---------------------------------------------------------- */
+static int readMeta(FILE *file, unsigned short *count, unsigned short *width,
+                    unsigned short *height) {
+  if (fread(count, sizeof(unsigned short), 1, file) != 1)
+    return 0;
+  if (fread(width, sizeof(unsigned short), 1, file) != 1)
+    return 0;
+  if (fread(height, sizeof(unsigned short), 1, file) != 1)
+    return 0;
+
+  return 1;
+}
+
+/* ----------------------------------------------------------
+   3. Einzelbild lesen
+   ---------------------------------------------------------- */
+static int readSingleImage(FILE *file, GrayScaleImage *img,
+                           unsigned short width, unsigned short height) {
+  img->width = width;
+  img->height = height;
+
+  size_t numPixels = (size_t)width * (size_t)height; // anzahl an pixeln
+  img->buffer = malloc(numPixels);
+  if (!img->buffer)
+    return 0;
+
+  if (fread(img->buffer, 1, numPixels, file) != numPixels) {
+    free(img->buffer);
+    img->buffer = NULL; // fehler bei ungültiger eingabe
+    return 0;
+  }
+  return 1;
+}
+
+/* ----------------------------------------------------------
+   4. Label lesen
+   ---------------------------------------------------------- */
+static int readLabel(FILE *file, unsigned char *label) {
+  return fread(label, 1, 1, file) == 1;
+}
+
+/* ----------------------------------------------------------
+   5. Komplette Bildserie lesen
+   ---------------------------------------------------------- */
+GrayScaleImageSeries *readImages(const char *path) {
+  FILE *file = fopen(path, "rb");
+  if (!file)
+    return NULL;
+
+  if (!readHeader(file)) {
+    fclose(file);
+    return NULL;
+  }
+
+  unsigned short count, width, height;
+  if (!readMeta(file, &count, &width, &height)) {
+
+    fclose(file);
+    return NULL;
+  }
+  // printf("%d, %d, %d", count, width, height);
+
+  GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
+  if (!series) {
+    fclose(file);
+    return NULL;
+  }
+
+  series->count = count;
+  series->images = malloc(count * sizeof(GrayScaleImage));
+  series->labels = malloc(count * sizeof(unsigned char));
+  if (!series->images || !series->labels) {
+    free(series->images);
+    free(series->labels);
+    free(series);
+    fclose(file);
+    return NULL;
+  }
+
+  for (unsigned int i = 0; i < count; i++) {
+    if (!readSingleImage(file, &series->images[i], width, height) ||
+        !readLabel(file, &series->labels[i])) {
+      // Aufräumen bei Fehler
+      for (unsigned int j = 0; j < i; j++) {
+        free(series->images[j].buffer);
+      }
+      free(series->images);
+      free(series->labels);
+      free(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)
-{
+/* ----------------------------------------------------------
+   6. Speicher komplett freigeben
+   ---------------------------------------------------------- */
+void clearSeries(GrayScaleImageSeries *series) {
+  if (!series)
+    return;
 
+  for (unsigned int i = 0; i < series->count; i++) {
+    free(series->images[i].buffer);
+  }
+
+  free(series->images);
+  free(series->labels);
+  free(series);
 }

imageInputTests.c

@@ -1,88 +1,98 @@
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include "unity.h"
 #include "imageInput.h"
+#include "unity.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
-
-static void prepareImageFile(const char *path, unsigned short int width, unsigned short int height, unsigned int short numberOfImages, unsigned char label)
-{
+/* ---------------------------------------------------------
+   Hilfsfunktion: Testdatei vorbereiten
+   --------------------------------------------------------- */
+static void prepareImageFile(const char *path, unsigned int width,
+                             unsigned int height, unsigned int numberOfImages,
+                             unsigned char label) {
   FILE *file = fopen(path, "wb");
+  if (!file)
+    return;
 
-    if(file != NULL)
-    {
+  // Header
   const char *fileTag = "__info2_image_file_format__";
-        GrayScalePixelType *zeroBuffer = (GrayScalePixelType *)calloc(numberOfImages * width * height, sizeof(GrayScalePixelType));
+  fwrite(fileTag, 1, strlen(fileTag), file);
 
-        if(zeroBuffer != NULL)
-        {
-            fwrite(fileTag, sizeof(fileTag[0]), strlen(fileTag), file);
-            fwrite(&numberOfImages, sizeof(numberOfImages), 1, file);
-            fwrite(&width, sizeof(width), 1, file);
-            fwrite(&height, sizeof(height), 1, file);
+  // Meta-Daten als unsigned short
+  unsigned short n = (unsigned short)numberOfImages;
+  unsigned short w = (unsigned short)width;
+  unsigned short h = (unsigned short)height;
+  fwrite(&n, sizeof(unsigned short), 1, file);
+  fwrite(&w, sizeof(unsigned short), 1, file);
+  fwrite(&h, sizeof(unsigned short), 1, file);
 
-            for(int i = 0; i < numberOfImages; i++)
-            {
-                fwrite(zeroBuffer, sizeof(GrayScalePixelType), width * height, file);
+  // Pixelbuffer
+  GrayScalePixelType *buffer =
+      calloc(width * height, sizeof(GrayScalePixelType));
+  if (!buffer) {
+    fclose(file);
+    return;
+  }
+  for (unsigned int i = 0; i < width * height; i++)
+    buffer[i] = (GrayScalePixelType)i;
+
+  // Jedes Bild schreiben: Pixel + Label
+  for (unsigned int img = 0; img < numberOfImages; img++) {
+    fwrite(buffer, sizeof(GrayScalePixelType), width * height, file);
     fwrite(&label, sizeof(unsigned char), 1, file);
   }
 
-            free(zeroBuffer);
-        }
-
+  free(buffer);
   fclose(file);
-    }
 }
 
+/* ---------------------------------------------------------
+   Unit Tests
+   --------------------------------------------------------- */
 
-void test_readImagesReturnsCorrectNumberOfImages(void)
-{
+void test_readImagesReturnsCorrectNumberOfImages(void) {
   GrayScaleImageSeries *series = NULL;
-    const unsigned short expectedNumberOfImages = 2;
+  const unsigned int expectedNumberOfImages = 2;
   const char *path = "testFile.info2";
   prepareImageFile(path, 8, 8, expectedNumberOfImages, 1);
   series = readImages(path);
   TEST_ASSERT_NOT_NULL(series);
-    TEST_ASSERT_EQUAL_UINT16(expectedNumberOfImages, series->count);
+  TEST_ASSERT_EQUAL_UINT(expectedNumberOfImages, series->count);
   clearSeries(series);
   remove(path);
 }
 
-void test_readImagesReturnsCorrectImageWidth(void)
-{
+void test_readImagesReturnsCorrectImageWidth(void) {
   GrayScaleImageSeries *series = NULL;
-    const unsigned short expectedWidth = 10;
+  const unsigned int expectedWidth = 10;
   const char *path = "testFile.info2";
   prepareImageFile(path, expectedWidth, 8, 2, 1);
   series = readImages(path);
   TEST_ASSERT_NOT_NULL(series);
   TEST_ASSERT_NOT_NULL(series->images);
-    TEST_ASSERT_EQUAL_UINT16(2, series->count);
-    TEST_ASSERT_EQUAL_UINT16(expectedWidth, series->images[0].width);
-    TEST_ASSERT_EQUAL_UINT16(expectedWidth, series->images[1].width);
+  TEST_ASSERT_EQUAL_UINT(2, series->count);
+  TEST_ASSERT_EQUAL_UINT(expectedWidth, series->images[0].width);
+  TEST_ASSERT_EQUAL_UINT(expectedWidth, series->images[1].width);
   clearSeries(series);
   remove(path);
 }
 
-void test_readImagesReturnsCorrectImageHeight(void)
-{
+void test_readImagesReturnsCorrectImageHeight(void) {
   GrayScaleImageSeries *series = NULL;
-    const unsigned short expectedHeight = 10;
+  const unsigned int expectedHeight = 10;
   const char *path = "testFile.info2";
   prepareImageFile(path, 8, expectedHeight, 2, 1);
   series = readImages(path);
   TEST_ASSERT_NOT_NULL(series);
   TEST_ASSERT_NOT_NULL(series->images);
-    TEST_ASSERT_EQUAL_UINT16(2, series->count);
-    TEST_ASSERT_EQUAL_UINT16(expectedHeight, series->images[0].height);
-    TEST_ASSERT_EQUAL_UINT16(expectedHeight, series->images[1].height);
+  TEST_ASSERT_EQUAL_UINT(2, series->count);
+  TEST_ASSERT_EQUAL_UINT(expectedHeight, series->images[0].height);
+  TEST_ASSERT_EQUAL_UINT(expectedHeight, series->images[1].height);
   clearSeries(series);
   remove(path);
 }
 
-void test_readImagesReturnsCorrectLabels(void)
-{
+void test_readImagesReturnsCorrectLabels(void) {
   const unsigned char expectedLabel = 15;
 
   GrayScaleImageSeries *series = NULL;
@@ -91,7 +101,7 @@ void test_readImagesReturnsCorrectLabels(void)
   series = readImages(path);
   TEST_ASSERT_NOT_NULL(series);
   TEST_ASSERT_NOT_NULL(series->labels);
-    TEST_ASSERT_EQUAL_UINT16(2, series->count);
+  TEST_ASSERT_EQUAL_UINT(2, series->count);
   for (int i = 0; i < 2; i++) {
     TEST_ASSERT_EQUAL_UINT8(expectedLabel, series->labels[i]);
   }
@@ -99,19 +109,16 @@ void test_readImagesReturnsCorrectLabels(void)
   remove(path);
 }
 
-void test_readImagesReturnsNullOnNotExistingPath(void)
-{
+void test_readImagesReturnsNullOnNotExistingPath(void) {
   const char *path = "testFile.txt";
   remove(path);
   TEST_ASSERT_NULL(readImages(path));
 }
 
-void test_readImagesFailsOnWrongFileTag(void)
-{
+void test_readImagesFailsOnWrongFileTag(void) {
   const char *path = "testFile.info2";
   FILE *file = fopen(path, "w");
-    if(file != NULL)
-    {
+  if (file != NULL) {
     fprintf(file, "some_tag                  ");
     fclose(file);
     TEST_ASSERT_NULL(readImages(path));
@@ -119,25 +126,85 @@ void test_readImagesFailsOnWrongFileTag(void)
   remove(path);
 }
 
-void setUp(void) {
-    // Falls notwendig, kann hier Vorbereitungsarbeit gemacht werden
+// Test
+
+void test_read_GrayScale_Pixel(
+    void) { // testet das einlesen eines graustufenbildes von readImages()
+  GrayScaleImageSeries *series = NULL; // enthält später das Bild
+  const char *path = "testFile.info2";
+
+  prepareImageFile(path, 8, 8, 1,
+                   1); // Höhe x Breite in Pixel, Anzahl Bilder und Kategorie
+  series = readImages(path);
+
+  TEST_ASSERT_NOT_NULL(series);             // Speicher reservieren
+  TEST_ASSERT_NOT_NULL(series->images);     // Inhalt ist da
+  TEST_ASSERT_EQUAL_UINT(1, series->count); // Anzahl der Bilder stimmt
+
+  for (int i = 0; i < (8 * 8); i++) {
+    TEST_ASSERT_EQUAL_UINT8(
+        (GrayScalePixelType)i,
+        series->images[0].buffer[i]); // alle Pixelwerte prüfen
+  }
+
+  clearSeries(series);
+  remove(path);
 }
 
-void tearDown(void) {
-    // Hier kann Bereinigungsarbeit nach jedem Test durchgeführt werden
+/* ---------------------------------------------------------
+   Optional: Mehrere Bilder gleichzeitig testen
+   --------------------------------------------------------- */
+
+void test_readImagesMultipleImagesContent(void) {
+  GrayScaleImageSeries *series = NULL;
+  const char *path = "testFile.info2";
+  const unsigned int numberOfImages = 3;
+  const unsigned int width = 4;
+  const unsigned int height = 4;
+  const unsigned char label = 7;
+
+  prepareImageFile(path, width, height, numberOfImages, label);
+
+  series = readImages(path);
+  TEST_ASSERT_NOT_NULL(series);
+  TEST_ASSERT_NOT_NULL(series->images);
+  TEST_ASSERT_NOT_NULL(series->labels);
+  TEST_ASSERT_EQUAL_UINT(numberOfImages, series->count);
+
+  for (unsigned int img = 0; img < numberOfImages; img++) {
+    for (unsigned int i = 0; i < width * height; i++)
+      TEST_ASSERT_EQUAL_UINT8((GrayScalePixelType)i,
+                              series->images[img].buffer[i]);
+    TEST_ASSERT_EQUAL_UINT8(label, series->labels[img]);
+  }
+
+  clearSeries(series);
+  remove(path);
 }
 
-int main()
-{
+/* ---------------------------------------------------------
+   Setup / Teardown
+   --------------------------------------------------------- */
+void setUp(void) {}
+void tearDown(void) {}
+
+/* ---------------------------------------------------------
+   main()
+   --------------------------------------------------------- */
+int main(void) {
   UNITY_BEGIN();
 
-    printf("\n============================\nImage input tests\n============================\n");
+  printf("\n============================\nImage input "
+         "tests\n============================\n");
+
   RUN_TEST(test_readImagesReturnsCorrectNumberOfImages);
   RUN_TEST(test_readImagesReturnsCorrectImageWidth);
   RUN_TEST(test_readImagesReturnsCorrectImageHeight);
   RUN_TEST(test_readImagesReturnsCorrectLabels);
   RUN_TEST(test_readImagesReturnsNullOnNotExistingPath);
   RUN_TEST(test_readImagesFailsOnWrongFileTag);
+  RUN_TEST(test_read_GrayScale_Pixel);
+  RUN_TEST(test_readImagesMultipleImagesContent);
 
   return UNITY_END();
 }

makefile

@@ -59,7 +59,8 @@ imageInputTests: imageInput.o imageInputTests.c $(unityfolder)/unity.c
 # --------------------------
 clean:
 ifeq ($(OS),Windows_NT)
-	del /f *.o *.exe
-else
 	rm -f *.o mnist runMatrixTests runNeuralNetworkTests runImageInputTests
+else
+	del /f *.o *.exe
 endif
+ 

matrix.c

@@ -3,17 +3,15 @@
 #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 createMatrix(const unsigned int rows, const unsigned int cols) {
+  if (cols == 0 || rows == 0) {
     Matrix errorMatrix = {0, 0, NULL};
-  if (rows == 0 || cols == 0) {
-
     return errorMatrix;
   }
   MatrixType *buffer =
@@ -23,202 +21,168 @@ Matrix createMatrix(unsigned int rows, unsigned int cols) {
   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
+
+  if (matrix->buffer != NULL) {
+    free((*matrix).buffer);
+    matrix->buffer = NULL;
+  }
+  matrix->rows = 0;
+  matrix->cols = 0;
 }
 
 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
+  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
+  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
+getMatrixAt(const Matrix matrix,
+            const unsigned int rowIdx, // Kopie der Matrix wird übergeben
+            const unsigned int colIdx) {
+  if (rowIdx >= matrix.rows || colIdx >= matrix.cols ||
+      matrix.buffer == NULL) { // Speichergröße nicht überschreiten
+    return UNDEFINED_MATRIX_VALUE;
   }
 
   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);
+Matrix broadCastCols(const Matrix matrix, const unsigned int cols) {
+  Matrix copy1 = createMatrix(matrix.rows, cols);
+  for (int r = 0; r < matrix.rows; r++) {
+    MatrixType valueMatrix1 = getMatrixAt(matrix, r, 0);
     for (int c = 0; c < cols; c++) {
-
-      setMatrixAt(value, copy, r, c);
+      setMatrixAt(valueMatrix1, copy1, r, c);
     }
   }
-
-  return copy;
+  return copy1;
 }
-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);
-
+Matrix broadCastRows(const Matrix matrix, const unsigned int rows) {
+  Matrix copy1 = createMatrix(rows, matrix.cols);
+  for (int c = 0; c < matrix.cols; c++) {
+    MatrixType valueMatrix1 = getMatrixAt(matrix, 0, c);
     for (int r = 0; r < rows; r++) {
-
-      setMatrixAt(value, copy, r, c);
+      setMatrixAt(valueMatrix1, copy1, r, c);
     }
   }
-
-  return copy;
+  return copy1;
 }
-
 Matrix add(const Matrix matrix1, const Matrix matrix2) {
 
-  // Broadcasting nur bei Vektor und Matrix, Fehlermeldung bei zwei unpassenden
-  // Matrizen
+  // Ergebnismatrix
+  Matrix result;
+  const int cols1 = matrix1.cols;
+  const int rows1 = matrix1.rows;
+  const int cols2 = matrix2.cols;
+  const int rows2 = matrix2.rows;
 
-  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 = (matrix1.rows == matrix2.rows) ? 1 : 0;
+  const int colsEqual = (matrix1.cols == matrix2.cols) ? 1 : 0;
 
-  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))
+  // Broadcasting nur bei Vektor und Matrix, Fehlermeldung bei zwei unpassender
+  // Matrix
+  if (rowsEqual == 1 && colsEqual == 1) {
+    Matrix result = createMatrix(matrix1.rows, matrix1.cols);
+    if (result.buffer == NULL) {
+      return (Matrix){0, 0, NULL};
     }
-
-    return result; // zurückgeben
+    for (int i = 0; i < rows1; i++) {
+      for (int j = 0; j < cols1; j++) {
+        int valueM1 = getMatrixAt(matrix1, i, j);
+        int valueM2 = getMatrixAt(matrix2, i, j);
+        int sum = valueM1 + valueM2;
+        setMatrixAt(sum, result, i, j);
       }
-
-  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))
+  } else if (rowsEqual == 1 && (cols1 == 1 || cols2 == 1)) {
+    if (cols1 == 1) { // broadcasting von vektor 1 zu matrix 1, add
+      Matrix newMatrix = broadCastCols(matrix1, cols2);
+      // add
+      Matrix result = createMatrix(newMatrix.rows, newMatrix.cols);
+      if (result.buffer == NULL) {
+        return (Matrix){0, 0, NULL};
       }
+      for (int i = 0; i < rows1; i++) {
+        for (int j = 0; j < cols2; j++) {
+          int valueM1 = getMatrixAt(newMatrix, i, j);
+          int valueM2 = getMatrixAt(matrix2, i, j);
+          int sum = valueM1 + valueM2;
+          setMatrixAt(sum, result, i, j);
+        }
+      }
+      clearMatrix(&newMatrix);
       return result;
-      // add und return
-
+    } else {
+      Matrix newMatrix2 = broadCastCols(matrix2, cols1);
+      // add
+      Matrix result = createMatrix(newMatrix2.rows, newMatrix2.cols);
+      if (result.buffer == NULL) {
+        return (Matrix){0, 0, NULL};
+      }
+      for (int i = 0; i < rows1; i++) {
+        for (int j = 0; j < cols1; j++) {
+          int valueM1 = getMatrixAt(matrix1, i, j);
+          int valueM2 = getMatrixAt(newMatrix2, i, j);
+          int sum = valueM1 + valueM2;
+          setMatrixAt(sum, result, i, j);
+        }
       }
 
-    else {
-
-      printf("Fehlermeldung"); // vielleicht Fehlermeldung ändern zu
-                               // Programmabbruch
-      Matrix error = {0, 0, NULL};
-      return error;
+      return result;
+    }
   }
 
-  }
-
-  else if (!rowsEqual && colsEqual) {
-
+  else if ((rows1 == 1 || rows2 == 1) && colsEqual == 1) {
     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))
+      Matrix newMatrix = broadCastRows(matrix1, rows2);
+      // add
+      Matrix result = createMatrix(newMatrix.rows, newMatrix.cols);
+      if (result.buffer == NULL) {
+        return (Matrix){0, 0, NULL};
+      }
+      for (int i = 0; i < rows2; i++) {
+        for (int j = 0; j < cols1; j++) {
+          int valueM1 = getMatrixAt(newMatrix, i, j);
+          int valueM2 = getMatrixAt(matrix2, i, j);
+          int sum = valueM1 + valueM2;
+          setMatrixAt(sum, result, i, j);
+        }
       }
       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))
+    } else {
+      Matrix newMatrix2 = broadCastRows(matrix2, rows1);
+      // add
+      Matrix result = createMatrix(newMatrix2.rows, newMatrix2.cols);
+      if (result.buffer == NULL) {
+        return (Matrix){0, 0, NULL};
+      }
+      for (int i = 0; i < rows1; i++) {
+        for (int j = 0; j < cols1; j++) {
+          int valueM1 = getMatrixAt(matrix1, i, j);
+          int valueM2 = getMatrixAt(newMatrix2, i, j);
+          int sum = valueM1 + valueM2;
+          setMatrixAt(sum, result, i, j);
+        }
+      }
+      clearMatrix(&newMatrix2);
+      return result;
+    }
+  } else {
+    // kein add möglich
+    Matrix errorMatrix = {0, 0, NULL};
+    return errorMatrix;
   }
   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.h

@@ -13,17 +13,15 @@ typedef struct {
 
 } Matrix;
 
-Matrix createMatrix(unsigned int rows, unsigned int cols);
+Matrix createMatrix(const unsigned int rows, const unsigned int cols);
 void clearMatrix(Matrix *matrix);
-void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx,
-                 unsigned int colIdx);
-MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx,
-                       unsigned int colIdx);
+void setMatrixAt(const MatrixType value, Matrix matrix,
+                 const unsigned int rowIdx, const unsigned int colIdx);
+MatrixType getMatrixAt(const Matrix matrix, const unsigned int rowIdx,
+                       const unsigned int colIdx);
 
-Matrix broadCastCols(const Matrix matrix, const unsigned int rows,
-                     const unsigned int cols);
-Matrix broadCastRows(const Matrix matrix, const unsigned int rows,
-                     const unsigned int cols);
+Matrix broadCastCols(const Matrix matrix, const unsigned int cols);
+Matrix broadCastRows(const Matrix matrix, const unsigned int rows);
 Matrix add(const Matrix matrix1, const Matrix matrix2);
 Matrix multiply(const Matrix matrix1, const Matrix matrix2);
 

neuralNetworkTests.c

@@ -5,69 +5,95 @@
 #include <stdlib.h>
 #include <string.h>
 
+/*typedef struct
+{
+    Matrix weights;
+    Matrix biases;
+    ActivationFunctionType activation;
+} Layer;
+
+typedef struct
+{
+    Layer *layers;
+    unsigned int numberOfLayers;
+} NeuralNetwork;*/
+
+/*Layer: Ebene im neuronalen Netzwerk, besteht aus mehreren Neuronen
+Input-Layer: Eingabedatei
+Hidden-Layer: verarbeiten die Daten
+Output-Layer: Ergebnis
+
+
+Gewichte: bestimmen, wie stark ein Eingangssignal auf ein Neuron wirkt
+
+Dimension: Form der Matrizen für einen Layer*/
+
+/* Gewichtsmatrix der Layer:
+ */
+
+// speichert NeuralNetwork nn in binäre Datei->später kann es wieder geöffnet
+// werden
 static void prepareNeuralNetworkFile(const char *path, const NeuralNetwork nn) {
-  FILE *f = fopen(path, "wb");
-  if (f == NULL)
-    return;
+  FILE *fptr = fopen(path, "wb"); // Binärdatei zum Schreiben öffnen
+  if (fptr == NULL)
+    return; // file konnte nicht geöffnet werden
 
-  /* 1) Header: exakt das String, ohne '\n' oder abschließendes '\0' */
-  const char header[] = "__info2_neural_network_file_format__";
-  fwrite(header, sizeof(char), strlen(header), f);
+  // Header ist Erkennungsstring am Anfang der Datei, loadmodel erkennt
+  // Dateiformat
+  const char header[] = "__info2_neural_network_file_format__"; // header string
+  fwrite(header, sizeof(char), strlen(header),
+         fptr); // der header wird am Anfang der Datei platziert
 
-  /* Wenn es keine Layer gibt, kein Dimensionspaar schreiben (loadModel
-     wird beim Lesen dann 0 zurückgeben). Aber wir können auch frühzeitig
-     mit einem 0-Int terminieren — beides ist in Ordnung. */
+  // Wenn es keine Layer gibt, 0 eintragen, LoadModel erkennt, dass Datei leer
+  // ist
   if (nn.numberOfLayers == 0) {
-    /* optional: schreibe ein 0 als next outputDimension (nicht nötig) */
     int zero = 0;
-    fwrite(&zero, sizeof(int), 1, f);
-    fclose(f);
+    fwrite(&zero, sizeof(int), 1, fptr);
+    fclose(fptr);
     return;
   }
 
-  /* 2) Für die erste Layer schreiben wir inputDimension und outputDimension */
-  /* inputDimension == weights.cols, outputDimension == weights.rows */
+  // Layer 0, inputDimension: Anzahl Input-Neuronen, outputDimension: Anzahl
+  // Output-Neuronen wird in Datei eingefügt
   int inputDim = (int)nn.layers[0].weights.cols;
   int outputDim = (int)nn.layers[0].weights.rows;
-  fwrite(&inputDim, sizeof(int), 1, f);
-  fwrite(&outputDim, sizeof(int), 1, f);
+  fwrite(&inputDim, sizeof(int), 1, fptr);
+  fwrite(&outputDim, sizeof(int), 1, fptr);
 
   /* 3) Für jede Layer in Reihenfolge: Gewichte (output x input), Biases (output
      x 1). Zwischen Layern wird nur die nächste outputDimension (int)
      geschrieben. */
   for (int i = 0; i < nn.numberOfLayers; i++) {
-    Layer layer = nn.layers[i];
+    Layer layer = nn.layers[i]; // kürzer, durch alle layer iterieren
 
     int wrows = (int)layer.weights.rows;
     int wcols = (int)layer.weights.cols;
-    int wcount = wrows * wcols;
+    int wcount = wrows * wcols; // Anzahl Gewichtseinträge
     int bcount =
-        layer.biases.rows * layer.biases.cols; /* normalerweise rows * 1 */
+        layer.biases.rows * layer.biases.cols; // Anzahl der Bias-Einträge
 
-    /* Gewichte (MatrixType binär) */
+    /* Gewichte */
     if (wcount > 0 && layer.weights.buffer != NULL) {
-      fwrite(layer.weights.buffer, sizeof(MatrixType), (size_t)wcount, f);
-    }
+      fwrite(layer.weights.buffer, sizeof(MatrixType), (size_t)wcount, fptr);
+    } // Gewichte werden als Matrix gespeichert
 
-    /* Biases (MatrixType binär) */
+    /* Biases */
     if (bcount > 0 && layer.biases.buffer != NULL) {
-      fwrite(layer.biases.buffer, sizeof(MatrixType), (size_t)bcount, f);
-    }
+      fwrite(layer.biases.buffer, sizeof(MatrixType), (size_t)bcount, fptr);
+    } // Biases werden als Vektor gespeichert
 
-    /* Für die nächste Layer: falls vorhanden, schreibe deren outputDimension */
+    /* outputDimensionen der nächsten Layer */
     if (i + 1 < nn.numberOfLayers) {
       int nextOutput = (int)nn.layers[i + 1].weights.rows;
-      fwrite(&nextOutput, sizeof(int), 1, f);
+      fwrite(&nextOutput, sizeof(int), 1, fptr);
     } else {
-      /* Letzte Layer: wir können das Ende signalisieren, indem wir ein 0
-         schreiben. loadModel liest dann outputDimension = 0 und beendet die
-         Schleife. */
+      // loadModel erkennt 0 als Ende der Datei
       int zero = 0;
-      fwrite(&zero, sizeof(int), 1, f);
+      fwrite(&zero, sizeof(int), 1, fptr);
     }
   }
 
-  fclose(f);
+  fclose(fptr); // Datei schließen
 }
 
 void test_loadModelReturnsCorrectNumberOfLayers(void) {