Implement ImageInput

Startcode/imageInput.c

@@ -19,63 +19,76 @@ static int controlFile(FILE *file) {
 
 static unsigned int readNumber(FILE *file) {
     unsigned int number = 0;
-    fread(&number, sizeof(unsigned short), 1, file);
+    unsigned int readcount = fread(&number, sizeof(unsigned short), 1, file);
+    if (readcount != 1) {
+        return 0;
+    }
     return number;
 }
 
 
 // fillBuffer und readLabel muss immer in einer Schleife zusammen stehen
 static int fillBuffer(unsigned char buffer[], unsigned int bufferSize, FILE *file) {
-        int readcount = fread(buffer, sizeof(GrayScalePixelType), bufferSize, file);
-        if (readcount == 0)
-            return 0;
+    unsigned int readcount = fread(buffer, sizeof(GrayScalePixelType), bufferSize, file);
+    if (readcount == 0) {
+        return 0;
+    }
     return 1;
 }
 
-static void readLabels(FILE *file, unsigned char label[], unsigned int count) {
-    fread(label + count, sizeof(char), 1, file);
+static int readLabels(FILE *file, unsigned char label[], unsigned int count) {
+    unsigned int readlabels = fread(label + count, sizeof(char), 1, file);
+    if (readlabels == 0) {
+        return 0;
+    }
+    return 1;
 }
 
 
 GrayScaleImageSeries *readImages(const char *path) {
     FILE *file = fopen(path, "rb");
-
     if (!controlFile(file)) {
         return NULL;
     }
-    GrayScaleImageSeries *firstSeries = malloc(sizeof(GrayScaleImageSeries));
-    firstSeries ->count = readNumber(file);
+    GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
+    series->count = readNumber(file);
     unsigned int width = readNumber(file);
     unsigned int height = readNumber(file);
-
-    firstSeries ->labels = malloc(firstSeries ->count*sizeof(unsigned char));
-    firstSeries ->images = malloc(firstSeries ->count*sizeof(GrayScaleImage));
-    firstSeries ->addrSourceTxt = file;
-    if (firstSeries ->labels == NULL || firstSeries ->images == NULL) {
+    if (width == 0 || height == 0 || series->count == 0 || series == NULL) {
         return NULL;
     }
-    int fault = 1;
-    unsigned int const bufferSize = width * height;
-    for (unsigned int i = 0; i < firstSeries ->count && fault; i++)
-    {
-        GrayScaleImage *grayScaleImage = &firstSeries ->images[i];
-        grayScaleImage ->buffer = malloc(width * height*sizeof(GrayScalePixelType));
-        grayScaleImage ->width = width;
-        grayScaleImage -> height = height;
-        if (width == 0 || height == 0 || firstSeries ->count == 0) { // prüfen ob eingabe richtig ist
-            return NULL;
-        }
-
-        fault = fillBuffer(grayScaleImage ->buffer, bufferSize, file);
-        readLabels(file, firstSeries ->labels, i);
+    // Füllen des structs series
+    series->labels = malloc(series->count * sizeof(unsigned char));
+    series->images = malloc(series->count * sizeof(GrayScaleImage));
+    series->addrSourceTxt = file;
+    if (series->labels == NULL || series->images == NULL) {
+        return NULL;
     }
 
-    return firstSeries;
+    // struct grayScaleImage füllen als Teil eines Arrays innerhalb series
+    int readBufferFault = 1;
+    int readLabelFault = 1;
+    unsigned int const bufferSize = width * height;
+    for (unsigned int i = 0; i < series
+                             ->count && readBufferFault && readLabelFault; i++) {
+        GrayScaleImage *grayScaleImage = &series->images[i];
+        grayScaleImage->buffer = calloc(bufferSize, width * height * sizeof(GrayScalePixelType));
+        grayScaleImage->width = width;
+        grayScaleImage->height = height;
+        readBufferFault = fillBuffer(grayScaleImage->buffer, bufferSize, file);// frage an tobi kann ich readbufferfault auch schöner initialisieren
+        readLabelFault = readLabels(file, series->labels, i);
+
+        if (grayScaleImage->buffer == NULL) {
+            return NULL;
+        }
+    }
+
+    return series;
 }
 
 
 void clearSeries(GrayScaleImageSeries *series) {
-    if (series == NULL) {return;}
+    if (series == NULL) { return; }
     if (series->images != NULL) {
         for (unsigned int i = 0; i < series->count; i++) {
             const GrayScaleImage image = series->images[i];
@@ -91,4 +104,3 @@ void clearSeries(GrayScaleImageSeries *series) {
     fclose(series->addrSourceTxt);
     free(series);
 }
-