imageInput_fertig

imageInput.c

@@ -11,12 +11,107 @@
 // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
-    GrayScaleImageSeries *series = NULL;
+    FILE *file = fopen(path, "rb");
+    if (!file)
+    {
+        return 0;
+    }
 
+    const size_t headerLEN = strlen(FILE_HEADER_STRING);
+    char buffer[BUFFER_SIZE];
+
+    if (fread(buffer, 1, headerLEN, file) != headerLEN)
+    {
+        fclose(file);
+        return 0;
+    }
+    buffer[headerLEN] = '\0';
+
+    if (strcmp(buffer, FILE_HEADER_STRING) != 0)
+    {
+        fclose(file);
+        return 0;
+    }
+
+    unsigned short count, height, width;
+
+    if (fread(&count, sizeof(unsigned short), 1, file) != 1 || fread(&height, sizeof(unsigned short), 1, file) != 1 ||
+        fread(&width, sizeof(unsigned short), 1, file) != 1)
+    {
+        fclose(file);
+        return 0;
+    }
+
+    GrayScaleImageSeries *series = malloc(sizeof(GrayScaleImageSeries));
+
+    if (!series)
+    {
+        fclose(file);
+        return 0;
+    }
+
+    series->count = count;
+    series->images = malloc(count * sizeof(GrayScaleImage));
+    series->labels = malloc(count * sizeof(unsigned char));
+
+    if (!series->images || !series->labels)
+    {
+        clearSeries(series);
+        fclose(file);
+        return 0;
+    }
+
+    for (int i = 0; i < count; i++)
+    {
+        series->images[i].width = width;
+        series->images[i].height = height;
+        series->images[i].buffer = malloc(width * height);
+
+        if (!series->images[i].buffer)
+        {
+            clearSeries(series);
+            fclose(file);
+            return 0;
+        }
+    }
+
+    for (int i = 0; i < count; i++)
+    {
+        size_t pixel_count = width * height;
+
+        if (fread(series->images[i].buffer, 1, pixel_count, file) != pixel_count)
+        {
+            clearSeries(series);
+            fclose(file);
+            return 0;
+        }
+
+        if (fread(&series->labels[i], 1, 1, file) != 1)
+        {
+            clearSeries(series);
+            fclose(file);
+            return 0;
+        }
+    }
+
+    fclose(file);
     return series;
 }
 
 // TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
 void clearSeries(GrayScaleImageSeries *series)
 {
+    if (series == 0)
+        return;
+
+    if (series->images)
+    {
+        for (int i = 0; i < series->count; i++)
+        {
+            free(series->images[i].buffer);
+        }
+        free(series->images);
+    }
+    free(series->labels);
+    free(series);
 }