Merge branch 'main' of https://git.efi.th-nuernberg.de/gitea/turtschinba100320/info2Praktikum-NeuronalesNetzBastiBjoern

imageInput.c

@@ -5,12 +5,59 @@
 
 #define BUFFER_SIZE 100
 #define FILE_HEADER_STRING "__info2_image_file_format__"
+#define FILE_HEADER_SIZE (sizeof(FILE_HEADER_STRING)-1)
+ 
 
 // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
+FILE *checkFile(const char *path)
+{
+    FILE *datei = fopen(path,"rb");
+    if (datei == NULL) 
+    {
+        perror("Datei konnte nicht geoeffnet werden");
+        return NULL;
+    }
+    char buffer[FILE_HEADER_SIZE+1];
+    if (fread(buffer,1,FILE_HEADER_SIZE,datei)!=FILE_HEADER_SIZE)
+    {
+        perror("Header konnte nicht eingelessen werden");
+        fclose(datei);
+        return NULL;
+    }
+    buffer[FILE_HEADER_SIZE] = '\0';
+    if (strcmp(buffer,FILE_HEADER_STRING)!=0)
+    {
+        printf("Falscher Dateikopf");
+        //printf("\n%s",buffer);
+        //printf("\n%s",FILE_HEADER_STRING);
+        //printf("\n%d",strcmp(buffer,FILE_HEADER_STRING));
+        fclose(datei);
+        return NULL;
+    }
+    return datei;
+}
 
 // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
+    FILE *datei = checkFile(path);
+    if (datei==NULL)
+    {
+        return NULL;
+    }
+    unsigned short image_count, width, height;
+    fread(&image_count,1,sizeof(unsigned short),datei);
+    fread(&width,1,sizeof(unsigned short),datei);
+    fread(&height,1,sizeof(unsigned short),datei);
+    //printf("%u Bilder und %u mal %u",image_count,width,height);
+    
+    fclose(datei);
+
+
+
+
+
+
     GrayScaleImageSeries *series = NULL;
     
     return series;

imageInput.h

@@ -19,5 +19,5 @@ typedef struct
 
 GrayScaleImageSeries *readImages(const char *path);
 void clearSeries(GrayScaleImageSeries *series);
-
+FILE *checkFile(const char *path);
 #endif

main.c

@@ -1,11 +1,13 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "imageInput.h"
-#include "mnistVisualization.h"
-#include "neuralNetwork.h"
+//#include "mnistVisualization.h"
+//#include "neuralNetwork.h"
 
 int main(int argc, char *argv[])
 {
+    readImages("mnist_test.info2");
+    /*
     const unsigned int windowWidth = 800;
     const unsigned int windowHeight = 600;
 
@@ -65,4 +67,5 @@ int main(int argc, char *argv[])
     }
 
     return exitCode;
+    */
 }

matrix.c

@@ -6,30 +6,67 @@
 
 Matrix createMatrix(unsigned int rows, unsigned int cols)
 {
-    
+    // Allocate memory for the matrix structure
+    Matrix matrix;  
+    matrix.rows = rows;
+    matrix.cols = cols;
+    matrix.data = (MatrixType *)malloc(rows * cols * sizeof(MatrixType));
+    if (matrix.data == NULL) 
+    {
+        // Handle memory allocation failure
+        matrix.rows = 0;
+        matrix.cols = 0;
+    }
 }
 
 void clearMatrix(Matrix *matrix)
 {
-    
+    // Free the allocated memory for the matrix data
+    if (matrix->data != NULL)   
+    {
+        free(matrix->data);
+        matrix->data = NULL;
+        matrix->rows = 0;
+        matrix->cols = 0;
+    }
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+   // Set the value at the specified row and column index
+    if (rowIdx < matrix.rows && colIdx < matrix.cols) 
+    {
+         matrix.data[rowIdx * matrix.cols + colIdx] = value;
+    }
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    // Get the value at the specified row and column index
+    if (rowIdx < matrix.rows && colIdx < matrix.cols) 
+    {
+        return matrix.data[rowIdx * matrix.cols + colIdx];
+    }
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    // Add two matrices and return the result
+    if (matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols) 
+    {
+        // Handle dimension mismatch
+        Matrix emptyMatrix = createMatrix(0, 0);
+        return emptyMatrix;
+    }
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    // Multiply two matrices and return the result
+    if (matrix1.cols != matrix2.rows) 
+    {
+        // Handle dimension mismatch
+        Matrix emptyMatrix = createMatrix(0, 0);
+        return emptyMatrix;
+    }
 }

matrix.h

@@ -6,6 +6,12 @@
 typedef float MatrixType;
 
 // TODO Matrixtyp definieren
+typedef struct 
+{
+    unsigned int rows;
+    unsigned int cols;
+    MatrixType *data;
+} Matrix; 
 
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);