--- joko/Uni/BSArch/04/bmp_fractal.c	2006/07/02 11:44:57	1.14
+++ joko/Uni/BSArch/04/bmp_fractal.c	2006/07/02 12:08:10	1.15
@@ -5,7 +5,7 @@
  * Uebung 4.4 
  */
 
-// $Id: bmp_fractal.c,v 1.14 2006/07/02 11:44:57 joko Exp $
+// $Id: bmp_fractal.c,v 1.15 2006/07/02 12:08:10 joko Exp $
 
 #include <windows.h>
 #include <stdio.h>
@@ -49,12 +49,12 @@
 					  0,
 					  NULL ))
 	{
-		fprintf(stdout, "%s: %s\n", msg, lpMsgBuf);
+		fprintf(stderr, "%s: %s\n", msg, lpMsgBuf);
 		LocalFree(lpMsgBuf);
 	}
 	else
 	{
-		fprintf(stdout, "Error at FormatMesage: %d\n",err=GetLastError());
+		fprintf(stderr, "Error at FormatMesage: %d\n",err=GetLastError());
 	}
 	exit(err);
 }
@@ -68,7 +68,7 @@
   // open file handle
   fd = fopen(filename, "wb+");
   if (NULL == fd) {
-    perror("open");
+    perror("Error while opening file for writing");
     exit(1);
   }
 
@@ -77,7 +77,7 @@
   
   // error checking
   if (-1 == len || len != sizeof(header)) {
-    perror("write");
+    perror("Error while writing header to file");
     exit(2);
   }
   
@@ -86,7 +86,7 @@
   for (i = 0; i < img_size; i++) {
     len = fwrite("\0\0\0", 1, 3, fd);
     if (-1 == len || len != 3) {
-      perror("write");
+      perror("Error while writing data to file");
       exit(4);
     }
   }
@@ -315,7 +315,7 @@
     
     // allocate memory for one worker's arguments
     if ((worker_args = malloc(sizeof(worker_args[0]))) == NULL)
-      perror("malloc"), exit(1);
+      perror("Error while allocating memory for worker arguments via malloc"), exit(1);
     
     // assign worker's arguments
     worker_args[0].start_row = worker_startrow;
@@ -348,11 +348,11 @@
   
   // allocate memory for table of all worker handles
   if ((worker_handles = malloc(workers * sizeof(worker_handles[0]))) == NULL)
-    perror("malloc"), exit(1);
+    perror("Error while allocating memory for worker handles via malloc"), exit(1);
 
   // allocate memory for table of all worker arguments
   if ((worker_args = malloc(workers * sizeof(worker_args[0]))) == NULL)
-    perror("malloc"), exit(1);
+    perror("Error while allocating memory for worker arguments via malloc"), exit(1);
   
   
   // calculate bitmap segment length for workers
@@ -431,7 +431,7 @@
   if (VERBOSE)
     fprintf(stdout, "waiting for workers to finish...\n");
   if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED)
-    perror("WaitForMultipleObjects");
+    printErrorAndExit("Error at WaitForMultipleObjects", GetLastError());
 
   // debugging: just run single thread
   //if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED)