Finished testing, no more Failures in imageInputTests

imageInput.c

@@ -6,17 +6,127 @@
 #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
+int checkString (FILE *file){ //Checks if String at the start of File equals expected Format (0 for wrong 1 for right)
+	if (file == NULL){ //returns 0 for empty file
+		return 0;
+	}
+	char expectedString[] = FILE_HEADER_STRING;
+	char actualString[BUFFER_SIZE];
+
+	rewind(file);
+	size_t bytesRead = fread(actualString, 1,27 , file); //Stores Bytes of start of File to actualString
+	if (bytesRead != 27){
+		return 0;
+	} //Returns 0 if File is to short
+	actualString[27] = '\0';
+
+	if (strcmp(actualString, expectedString) != 0){
+		return 0;
+	}
+	else{
+		return 1;
+	}	
+}
+
+static void setParameters(FILE* file, unsigned int* imageCount, unsigned int* width, unsigned int* height);
+static int allocateMemory(GrayScaleImageSeries *series, const int imageCount, const int width, const int height);
+
 
-// TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
-    GrayScaleImageSeries *series = NULL;
-    
+	FILE* file = fopen(path, "rb");
+    if(!(checkString(file))){
+        fclose(file);
+		return NULL;
+    }
+
+    unsigned int width, height; //uninitialised Variables, will be set by setparamters
+
+
+    GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries)); //Reserving memory for series
+
+    setParameters(file, &(series->count), &width, &height); //setting parameters taken from image file
+
+    if(!allocateMemory(series, series->count, width, height)){
+        clearSeries(series); //If Memory couldnt be correctly allocated a clearing is necessary
+        fclose(file);
+        return NULL;
+    }
+
+
+
+    //Getting image data
+	for(unsigned int i = 0; i < series->count ; i++){ //Iterating for every image
+        for(unsigned int j = 0; j < width * height; j++){ //Iterating for every pixel
+		fread(&(series->images[i].buffer[j]), sizeof(GrayScalePixelType), 1, file);
+        }
+        fread(&(series->labels[i]), sizeof(unsigned char), 1, file); // TODO Added writing in labels array
+	}
+	fclose(file);
     return series;
 }
 
-// TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
 void clearSeries(GrayScaleImageSeries *series)
 {
+    if (!series)
+        return;
+
+    //Freeing Pixelbuffer for every image
+	for(unsigned int i = 0; i < series->count; i++)
+	{
+		free(series->images[i].buffer);
+	}
+    free(series->images); //Freeing Images array
+
+    free(series->labels); //Freeing Labels
+    free(series); //Freeing Main Structure
+
+}
+static void setParameters(FILE* file, unsigned int* imageCount, unsigned int* width, unsigned int* height) { // sets the parameters
+
+	unsigned short buffer[3];
+
+	fseek(file, 27, SEEK_SET);
+    if(fread(buffer, sizeof(unsigned short), 3, file) != 3){ // TODO changed some stuff here, used UNSIGNED SHORT instead of UNSIGNED CHAR!!
+        *imageCount = 0;
+        *width = 0;
+        *height = 0;
+        return;
+    } //Stops if file is too short and clean up
+
+	*imageCount = (unsigned int) buffer[0];
+
+    *width = (unsigned int) buffer[1];
+
+    *height = (unsigned int) buffer[2];
+}
+
+static int allocateMemory(GrayScaleImageSeries *series, const int imageCount, const int width, const int height) {
+    series->count = imageCount; //counts number of images in series
+
+    series->images = malloc (sizeof(GrayScaleImage) * imageCount); //Reserving Memory for Images Array
+    if (series->images == NULL)
+        return 0;
+
+
+    series->labels = malloc (series->count * sizeof(unsigned char)); //One Label for every Image
+    if (series->labels == NULL){
+        return 0;}
+
+	for (int i = 0; i < imageCount; i++) { //Reserving Memory for every Images Pixelbuffer and setting width and height
+	    series->images[i].width = width;
+        series->images[i].height = height;
+
+        series->images[i].buffer =  malloc(width * height * sizeof(unsigned char)); // allocates memory for every image in the series
+        if (series->images[i].buffer == NULL){
+            for (int j = 0; j < i; j++){
+                free(series->images[j].buffer);
+                }
+            free(series->images);
+            free(series->labels);
+            return 0;
+        }
+
+	}
+    return 1;
 }

imageInputTests.c

@@ -39,12 +39,16 @@ static void prepareImageFile(const char *path, unsigned short int width, unsigne
 void test_readImagesReturnsCorrectNumberOfImages(void)
 {
     GrayScaleImageSeries *series = NULL;
+
     const unsigned short 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);
+
     clearSeries(series);
     remove(path);
 }

matrix.c

@@ -1,34 +1,43 @@
 #include <stdlib.h>
 #include <string.h>
+#include <stdio.h>
 #include "matrix.h"
 
 // TODO Matrix-Funktionen implementieren
 
-typedef struct Matrix {
-    unsigned int rows;
-    unsigned int cols;
-    MatrixType* buffer;
-} Matrix;
-
-
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
-    
+    Matrix newMatrix;
+	if (rows == 0 || cols == 0) {
+		newMatrix.rows = 0;
+		newMatrix.cols = 0;
+		newMatrix.buffer = NULL;
+		return newMatrix;
+	}
+
+	newMatrix.rows = rows;
+	newMatrix.cols = cols;
+
+	newMatrix.buffer = calloc(rows*cols, sizeof(MatrixType));
+	return newMatrix;
 }
 
 void clearMatrix(Matrix *matrix)
 {
-    
+    free(matrix->buffer);
+	matrix->buffer = NULL;
+	matrix->rows = 0;
+	matrix->cols = 0;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
     if (rowIdx >= matrix.rows || colIdx >= matrix.cols){
         printf("Index out of bounds\n"); //Error Message because Index Input exceeds Matrix
-}
+	}
     else{
         matrix.buffer[rowIdx * matrix.cols + colIdx] = value; //Writes Value of value variable in the selected place in Matrix
-}
+	}
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
@@ -41,32 +50,85 @@ MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int co
 
        MatrixType value = matrix.buffer[rowIdx * matrix.cols + colIdx]; //Stores value of selected place of Matrix in value variable
         return value;
+	}
 }
-  }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    Matrix MatrixErgebnis = createMatrix(matrix1.rows, matrix1.cols); //Creating Result Matrix
-    if(matrix1.cols != matrix2.cols || matrix1.rows != matrix2.rows){
-        printf("Matrix dimensions do not match\n"); //Error Message if dimensions of Input Matrixes are not identical
-        MatrixErgebnis = clearMatrix(MatrixErgebnis);
-        return MatrixErgebnis;
-    }
-    else{
 
+    //If rows and cols of both Matrixes are the same the normal addition starts
+    if (matrix1.rows == matrix2.rows && matrix1.cols == matrix2.cols){
+        Matrix MatrixErgebnis = createMatrix(matrix1.rows, matrix1.cols);
         for (unsigned int i = 0; i < matrix1.rows; i++){
             for (unsigned int j = 0; j < matrix1.cols; j++){
                 //Adding Matrix Elements of same row and col index together and store in new Matrix
                 MatrixErgebnis.buffer[i * matrix1.cols + j] = matrix1.buffer[i * matrix1.cols + j] + matrix2.buffer[i * matrix1.cols + j];
 
-                }
+            }
         }
+        return MatrixErgebnis;
+    }
+
+    //if matrix1 is a Vektor it adds elements to first col of matrix2
+    else if (matrix1.cols == 1 && matrix1.rows == matrix2.rows){
+        Matrix MatrixErgebnis = createMatrix(matrix2.rows, matrix2.cols);
+        for (unsigned int i = 0; i < matrix2.rows; i++) {
+          for (unsigned int j = 0; j < matrix2.cols; j++) {
+            //Copy Matrix2 to ErgebnisMatrix
+            MatrixErgebnis.buffer[i * matrix2.cols + j] = getMatrixAt(matrix2, i, j);
+            //Adding Elements of first col of Matrix 1 (Vector) to all Elements of MatrixErgebnis
+            MatrixErgebnis.buffer[i * matrix2.cols + j] += matrix1.buffer[i];
+           }
+        }
+    return MatrixErgebnis;
+    }
+    //if matrix2 is a Vektor it adds elements to first col of matrix1
+    else if (matrix2.cols == 1 && matrix1.rows == matrix2.rows){
+        Matrix MatrixErgebnis = createMatrix(matrix1.rows, matrix1.cols);
+        for (unsigned int i = 0; i < matrix1.rows; i++) {
+            for (unsigned int j = 0; j < matrix1.cols; j++) {
+                //Copy Matrix1 to ErgebnisMatrix
+                MatrixErgebnis.buffer[i * matrix1.cols + j] = getMatrixAt(matrix1, i, j);
+                //Adding Elements of first col of Matrix 2 (Vector) to first col of MatrixErgebnis
+                MatrixErgebnis.buffer[i * matrix1.cols + j] += matrix2.buffer[i];
+
+            }
+        }
+    return MatrixErgebnis;
+    }
+    else{
+           printf("Matrix dimensions do not match\n"); //Error Message if dimensions of Input Matrixes are not identical
+           Matrix MatrixErgebnis = createMatrix(0, 0);
+           clearMatrix(&MatrixErgebnis);
+           return MatrixErgebnis;
+    }
 
-  }
-return MatrixErgebnis;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    Matrix result;
+    result.rows = 0;
+    result.cols = 0;
+    result.buffer = NULL;
+
+    if (matrix1.cols != matrix2.rows) {
+      return result;
+	}
+
+    result.rows = matrix1.rows;
+    result.cols = matrix2.cols;
+
+        result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
+
+        for(int i = 0; i < result.rows; i++) {
+            for(int j = 0; j < result.cols; j++) {
+                MatrixType value = 0;
+                for(int k = 0; k < matrix1.cols; k++) {
+                    value += matrix1.buffer[i * matrix1.cols + k] * matrix2.buffer[k * matrix2.cols + j];
+                }
+                result.buffer[i * result.cols + j] = value;
+            }
+    }
+    return result;
 }

matrix.h

@@ -7,7 +7,11 @@ typedef float MatrixType;
 
 // TODO Matrixtyp definieren
 
-typedef struct Matrix;
+typedef struct Matrix{
+    unsigned int rows;
+    unsigned int cols;
+    MatrixType* buffer;
+}Matrix;