debugging

imageInput.c

@@ -6,17 +6,103 @@
 #define BUFFER_SIZE 100
 #define FILE_HEADER_STRING "__info2_image_file_format__"
 
+// Funktionen müssen noch auf Teilfunktionen 
+// übersichtlich aufgeteilt werden!
+
 // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
+int readStatusInfo(FILE **source, char *const headerString, unsigned int *const imageCount, int *const imageWidth, int *const imageHeight, int const amountToRead);
+void readImagedata(FILE **source, char *const imageBuffer, char *const labelBuffer,int const imageCount ,int const amountToRead);
+
 
 // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
     GrayScaleImageSeries *series = NULL;
+
+    // selbst geschriebene Variablen
+    FILE                    *readSource;
+    int                     i                           = 0;
+    unsigned int            numberOfBytesToRead         = 0;
+    const unsigned int      amountOfStatusInfoToRead    = 1;
+    char                    headerString[sizeof("__info2_image_file_format__")];
+
+
+    readSource = fopen(path, "rb");
+
+    if (readSource != NULL)
+    {
+
+        numberOfBytesToRead = readStatusInfo(&readSource, headerString, &series->count, &series->images->width, &series->images->height, amountOfStatusInfoToRead);
+        
+        series->images->buffer  = calloc((series->count) * numberOfBytesToRead, sizeof(GrayScalePixelType));
+        series->labels          = calloc((series->count),                       sizeof(&(series->labels)));
+
+        readImagedata(&readSource, series->images->buffer, series->labels, series->count, numberOfBytesToRead);
+    }
+
+    fclose(readSource);
     
+
     return series;
 }
 
 // TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
 void clearSeries(GrayScaleImageSeries *series)
 {
+    int i = 0;
+
+
+    // Write NULL into all memory spaces
+    for (i = 0; i < ((series->count) * (series->images->width) * (series->images->height)); i++)
+    {
+        *(series->images->buffer + i * (series->images->width) * (series->images->height)) = '\0';
+    }
+    for (i = 0; i < (series->count); i++)
+    {
+        *(series->labels + i) = '\0';
+    }
+    series->count           = 0;
+    series->images->width   = 0;
+    series->images->height  = 0;
+
+    // Closse all allocated memory
+    // AND write NULL into every pointer
+    // so they can't be accessed
+    free(series->images->buffer);
+    free(series->labels);
+    series->images->buffer  = NULL;
+    series->images          = NULL;
+    series->labels          = NULL;
+    free(series);
+    series                  = NULL;
+
 }
+
+
+//  reads string, pictureCount, pictureWidth, pictureHight
+int readStatusInfo(FILE **source, char *const headerString, unsigned int *const imageCount, int *const imageWidth, int *const imageHeight, int const amountToRead)
+{
+    int bytesToRead = 0;
+
+    fread(headerString, sizeof(*headerString),   amountToRead, *source);
+    fread(imageCount,   sizeof(*imageCount),     amountToRead, *source);
+    fread(imageWidth,   sizeof(*imageWidth),     amountToRead, *source);
+    fread(imageHeight,  sizeof(*imageHeight),    amountToRead, *source);
+
+    bytesToRead = (*imageWidth) * (*imageHeight);
+
+    return bytesToRead;
+}
+
+//  reads the imagebytes and the label of all images
+void readImagedata(FILE **source, char *const imageBuffer, char *const labelBuffer,int const imageCount ,  int const amountOfBytes)
+{
+    int i = 0;
+
+    for (i = 0; i <= imageCount; i++)
+    {
+    fread((imageBuffer + i * amountOfBytes),    sizeof(&(imageBuffer)), amountOfBytes,  *source);
+    fread((labelBuffer + i),                    sizeof(&(labelBuffer)), 1,              *source);
+    }
+}
+