X-Git-Url: http://git.kpe.io/?p=ctsim.git;a=blobdiff_plain;f=src%2Fsdf-2.c;fp=src%2Fsdf-2.c;h=57a8469f739cf2fb0b6429f279b0dadc240cb82b;hp=29ccc34ac570c665c5d59d0060231f5249991434;hb=8f6d22c1d18c183cfcb95ca97cea85cbae0ab6c3;hpb=881aa76b85473224ec84fbc6858a3b0f84c1fcf4

diff --git a/src/sdf-2.c b/src/sdf-2.c
index 29ccc34..57a8469 100644
--- a/src/sdf-2.c
+++ b/src/sdf-2.c
@@ -2,8 +2,11 @@
 **  This is part of the CTSim program
 **  Copyright (C) 1983-2000 Kevin Rosenberg
 **
-**  $Id: sdf-2.c,v 1.4 2000/05/16 04:33:59 kevin Exp $
+**  $Id: sdf-2.c,v 1.5 2000/05/24 22:50:04 kevin Exp $
 **  $Log: sdf-2.c,v $
+**  Revision 1.5  2000/05/24 22:50:04  kevin
+**  Added support for new SGP library
+**
 **  Revision 1.4  2000/05/16 04:33:59  kevin
 **  Improved option processing
 **
@@ -138,11 +141,21 @@ sdf2_main (int argc, char *const argv[])
 
   im_in1 = image_load (in_file1);
   im_in2 = image_load (in_file2);
+  if (im_in1 == NULL || im_in2 == NULL) {
+      fprintf(stderr, "Error reading an image");
+      return (1);
+  }
+
   if (im_in1->nx != im_in2->nx || im_in1->ny != im_in2->ny) {
-    fprintf(stderr, "Size of image 1 (%d,%d) and image 2 (%d,%d) do not match\n",
+    fprintf(stderr, "Error: Size of image 1 (%d,%d) and image 2 (%d,%d) do not match\n",
 	    im_in1->nx, im_in1->ny, im_in2->nx, im_in2->ny);
-    exit(1);
+    return(1);
+  }
+  if (im_in1->nx < 0 || im_in1->ny < 0) {
+      fprintf(stderr, "Error: Size of image < 0");
+      return(1);
   }
+
   im_out = image_create (out_file, im_in1->nx, im_in1->ny);
 
   if (opt_add) {