--- /dev/null
+/* atlc - arbitrary transmission line calculator, for the analysis of
+transmission lines are directional couplers.
+
+Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either package_version 2
+of the License, or (at your option) any later package_version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+USA.
+
+Dr. David Kirkby, e-mail drkirkby at gmail.com
+
+*/
+
+/* This routines checkes for short circuits in the image. Clearly, it is
+should not possible to have a 1V conductor touching a -1 V conductor.
+
+Although currently the software does not support the use of a floating
+conductor (an anea of fixed, but undefined) voltage, error messages
+to take this into account have been included, but commentted out.*/
+
+
+#include "config.h"
+
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#include "definitions.h"
+
+extern int width, height;
+extern unsigned char **oddity;
+
+/* This checks for shorts. We only check to the right (increasing w) and below (increasing h)
+since its pointless checking all directions when one moves to an adjacent pixel later */
+void check_for_shorts(void)
+{
+ int w, h;
+
+ for(h=1;h<height-1;h++)
+ {
+ for(w=1; w<width-1;w++)
+ {
+ if( oddity[w][h]==CONDUCTOR_ZERO_V )
+ {
+ /* Check to see if the pixel below is shorted */
+ if((oddity[w][h+1]==CONDUCTOR_PLUS_ONE_V) || (oddity[w][h+1]==CONDUCTOR_MINUS_ONE_V) || (oddity[w][h+1]==CONDUCTOR_FLOATING))
+ {
+ fprintf(stderr,"\n**************ERROR******************\n");
+ fprintf(stderr,"Pixel (%d,%d) is set to 0V, but pixel\n",w,h);
+ fprintf(stderr,"(%d,%d) is set to a different fixed voltage\n",w,h+1);
+ fprintf(stderr,"creating a short. Please correct this.\n");
+ exit_with_msg_and_exit_code("",CONDUCTOR_ZERO_V);
+ }
+ /* Check to see if the pixel to the right is shorted */
+ else if((oddity[w+1][h]==CONDUCTOR_PLUS_ONE_V) || (oddity[w+1][h]==CONDUCTOR_MINUS_ONE_V) || (oddity[w+1][h]==CONDUCTOR_FLOATING))
+ {
+ fprintf(stderr,"\n**************ERROR******************\n");
+ fprintf(stderr,"Pixel (%d,%d) is set to 0V, but pixel\n",w,h);
+ fprintf(stderr,"(%d,%d) is set to a different fixed voltage\n",w+1,h);
+ fprintf(stderr,"creating a short. Please correct this.\n");
+ exit_with_msg_and_exit_code("",CONDUCTOR_ZERO_V);
+ }
+
+ } /* end of if(oddity==CONDUCTOR_ZERO_V) */
+
+ else if( oddity[w][h]==CONDUCTOR_PLUS_ONE_V )
+ {
+ /* Check for a short of the pixel below */
+ if((oddity[w][h+1]==CONDUCTOR_ZERO_V) || \
+ (oddity[w][h+1]==CONDUCTOR_MINUS_ONE_V) \
+ || (oddity[w][h+1]==CONDUCTOR_FLOATING))
+ {
+ fprintf(stderr,"\n**************ERROR******************\n");
+ fprintf(stderr,"Pixel (%d,%d) is set to 1 V, but pixel\n",w,h);
+ fprintf(stderr,"(%d,%d) is set to a different fixed voltage\n",w,h+1);
+ fprintf(stderr,"creating a short. Please correct this.\n");
+ exit_with_msg_and_exit_code("",CONDUCTOR_PLUS_ONE_V);
+ }
+ /* Check to see if the pixel to the right is shorted */
+ else if((oddity[w+1][h]==CONDUCTOR_ZERO_V) || \
+ (oddity[w+1][h]==CONDUCTOR_MINUS_ONE_V) \
+ || (oddity[w+1][h]==CONDUCTOR_FLOATING))
+ {
+ fprintf(stderr,"\n**************ERROR******************\n");
+ fprintf(stderr,"Pixel (%d,%d) is set to 1 V, but pixel\n",w,h);
+ fprintf(stderr,"(%d,%d) is set to a different fixed voltage\n",w+1,h);
+ fprintf(stderr,"creating a short. Please correct this.\n");
+ exit_with_msg_and_exit_code("",CONDUCTOR_PLUS_ONE_V);
+ }
+ } /* end of if(oddity==CONDUCTOR_PLUS_ONE_V) */
+
+ else if( oddity[w][h]==CONDUCTOR_MINUS_ONE_V )
+ {
+ /* Check for a short of the pixel below */
+ if((oddity[w][h+1]==CONDUCTOR_ZERO_V) || \
+ (oddity[w][h+1]==CONDUCTOR_PLUS_ONE_V) \
+ || (oddity[w][h+1]==CONDUCTOR_FLOATING))
+ {
+ fprintf(stderr,"\n**************ERROR******************\n");
+ fprintf(stderr,"Pixel (%d,%d) is set to -1 V, but pixel\n",w,h);
+ fprintf(stderr,"(%d,%d) is set to a different fixed voltage\n",w,h+1);
+ fprintf(stderr,"creating a short. Please correct this.\n");
+ exit_with_msg_and_exit_code("",CONDUCTOR_MINUS_ONE_V);
+ }
+ /* Check to see if the pixel to the right is shorted */
+ if((oddity[w][h+1]==CONDUCTOR_ZERO_V) || \
+ (oddity[w][h+1]==CONDUCTOR_PLUS_ONE_V) \
+ || (oddity[w][h+1]==CONDUCTOR_FLOATING))
+ {
+ fprintf(stderr,"\n**************ERROR******************\n");
+ fprintf(stderr,"Pixel (%d,%d) is set to -1 V, but pixel\n",w,h);
+ fprintf(stderr,"(%d,%d) is set to a different fixed voltage\n",w,h+1);
+ fprintf(stderr,"creating a short. Please correct this.\n");
+ exit_with_msg_and_exit_code("",CONDUCTOR_MINUS_ONE_V);
+ }
+ } /* end of if(oddity==CONDUCTOR_PLUS_ONE_V) */
+ } /* end of for w.. loop */
+ } /* end of for h .. loop */
+} /* end of function check_for_shorts */
+
projects / debian / atlc / blobdiff