ImageInput Funktionen implementiert

Startcode/imageInput.c

@@ -6,14 +6,119 @@
 #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;
 
+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