Sometimes there are lots of entries in the result buffer. But we may only care some of them. So I patched xcscope.el to add that functionality. There are 3 interactive functions added:
cscope-wash-flush
cscope-wash-keep
cscope-undo
Since it may not frequently used, I didn't assign hot keys for them.
The implementation is straight-forward: just make the buffer writable, them call flush-lines or keep-lines accordingly.
In fact, to gain more flexibility, you can just 'C-x C-q' to change *cscope* buffer to writable and operate on it directly.
diff -cb xcscope.el xcscope.wash.el > xcscope.wash.patch
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The patch file is based on the xcscope.el come with cscope-15.6.tar.gz