The core development team is very pleased to announce the availability of PPL 1.1, a new release of the Parma Polyhedra Library.
This release includes support for "positive time elapse," a new operator on polyhedra, improvements to the Java interface, several portability improvements and a few bug fixes.
The precise list of user-visible changes is below. For more information, please come and visit the new PPL web site at
http://bugseng.com/products/ppl
On behalf of all the past and present developers listed at http://bugseng.com/products/ppl/credits and in the file CREDITS,
Roberto Bagnara Patricia M. Hill Enea Zaffanella Abramo Bagnara
BUGSENG srl (http://bugseng.com)
-------------------------------------------------------------------------- NEWS for version 1.1 (released on October 28, 2013) --------------------------------------------------------------------------
New and Changed Features ========================
o Added a new operator on polyhedra: the positive time elapse.
o In the Java language interface:
- The constraint/generator/... system classes now extend the ArrayList generic container (rather than Vector);
- Variable objects are now built from a long (rather than int) value, thereby matching the type used elsewhere for space dimensions;
- added new static method to Variable class void setStringifier(Variable_Stringifier) where Variable_Stringifier is an interface allowing for customization of the output routine for variable's names (see example in interfaces/Java/tests/Variable_Output_test1.java);
- added value NOT_EQUAL to enumeration Relation_Symbol.
Bugfixes ========
o Portability improved.
o Fixed a precision regression in Polyhedron method void drop_some_non_integer_points(const Variables_Set&, Complexity_Class);
o In the Java language interface, fixed a C++/Java conversion error whereby the construction of a valid Variable object in JNI code was leading to an exception being thrown. The bug has only been observed on 32-bit builds.
o In the Java interface, fixed declaration of methods void drop_some_non_integer_points(...); so as to accept a Complexity_Class enum value.
o Fixed an issue in method MIP_Problem::OK() whereby the method was trying to enforce a non-invariant condition.