Revision: 45863
http://brlcad.svn.sourceforge.net/brlcad/?rev=45863&view=rev
Author: brlcad
Date: 2011-08-09 23:04:15 +0000 (Tue, 09 Aug 2011)
Log Message:
-----------
prevent crashing if the dsp buffer isn't set yet
Modified Paths:
--------------
brlcad/trunk/src/librt/primitives/dsp/dsp.h
Modified: brlcad/trunk/src/librt/primitives/dsp/dsp.h
===================================================================
--- brlcad/trunk/src/librt/primitives/dsp/dsp.h 2011-08-09 22:36:06 UTC (rev
45862)
+++ brlcad/trunk/src/librt/primitives/dsp/dsp.h 2011-08-09 23:04:15 UTC (rev
45863)
@@ -23,12 +23,11 @@
*/
/* access to the DSP data array */
-# define DSP(_p, _x, _y) ( \
- ( \
- (unsigned short *) \
- ((_p)->dsp_buf) \
- )[ \
- (_y) * ((struct rt_dsp_internal *)_p)->dsp_xcnt + (_x) ] )
+# define DSP(_p, _x, _y) ( \
+ ((_p) && (_p)->dsp_buf) ? \
+ ((unsigned short *)((_p)->dsp_buf))[ \
+ (_y) * ((struct rt_dsp_internal *)_p)->dsp_xcnt + (_x) \
+ ] : 0)
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