CVSROOT: /cvs/ppl Module name: ppl Branch: grids Changes by: mundell@cs.unipr.it 2005-04-21 12:10:11

Modified files: src : Grid_simplify.cc Grid_nonpublic.cc Grid_minimize.cc

Log message: Return a bool from the update_congruences and simplify methods to indicate whether the grid is empty. Pass this return on in the minimize and add_and_minimize methods which call simplify. Assert an equal number of columns in source1 and source2 in add_and_minimize\5 (congruence to generator). In update_congruences and update_generators set the grid empty according to the minimize return. In both simplifys use the row number instead of the row to test if the original row and pivot must be swapped. In the congruence simplify when adding the top row, search for a valid modulus and set the diagonal (and modulus) to the result of the search.

Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/ppl/src/Grid_simplify.cc.diff?cvsr... http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/ppl/src/Grid_nonpublic.cc.diff?cvs... http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/ppl/src/Grid_minimize.cc.diff?cvsr...