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/* Result enum and supporting function declarations.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL 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 version 3 of the License, or (at your
option) any later version.
The PPL 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#ifndef PPL_Result_defs_hh
#define PPL_Result_defs_hh 1
namespace Parma_Polyhedra_Library {
enum Result_Class {
//! \hideinitializer Representable number result class.
VC_NORMAL = 0 << 4,
//! \hideinitializer Negative infinity result class.
VC_MINUS_INFINITY = 1 << 4,
//! \hideinitializer Positive infinity result class.
VC_PLUS_INFINITY = 2 << 4,
//! \hideinitializer Not a number result class.
VC_NAN = 3 << 4,
VC_MASK = VC_NAN
};
// This must be kept in sync with Relation_Symbol
enum Result_Relation {
//! \hideinitializer No values satisfies the relation.
VR_EMPTY = 0,
//! \hideinitializer Equal. This need to be accompanied by a value.
VR_EQ = 1,
//! \hideinitializer Less than. This need to be accompanied by a value.
VR_LT = 2,
//! \hideinitializer Greater than. This need to be accompanied by a value.
VR_GT = 4,
//! \hideinitializer Not equal. This need to be accompanied by a value.
VR_NE = VR_LT | VR_GT,
//! \hideinitializer Less or equal. This need to be accompanied by a value.
VR_LE = VR_EQ | VR_LT,
//! \hideinitializer Greater or equal. This need to be accompanied by a value.
VR_GE = VR_EQ | VR_GT,
//! \hideinitializer All values satisfy the relation.
VR_LGE = VR_LT | VR_EQ | VR_GT,
VR_MASK = VR_LGE
};
//! Possible outcomes of a checked arithmetic computation.
/*! \ingroup PPL_CXX_interface */
enum Result {
//! \hideinitializer The exact result is not comparable.
V_EMPTY = VR_EMPTY,
//! \hideinitializer The computed result is exact.
V_EQ = VR_EQ,
//! \hideinitializer The computed result is inexact and rounded up.
V_LT = VR_LT,
//! \hideinitializer The computed result is inexact and rounded down.
V_GT = VR_GT,
//! \hideinitializer The computed result is inexact.
V_NE = VR_NE,
//! \hideinitializer The computed result may be inexact and rounded up.
V_LE = VR_LE,
//! \hideinitializer The computed result may be inexact and rounded down.
V_GE = VR_GE,
//! \hideinitializer The computed result may be inexact.
V_LGE = VR_LGE,
//! \hideinitializer The exact result is a number out of finite bounds.
V_OVERFLOW = 1 << 6,
//! \hideinitializer A negative integer overflow occurred (rounding up).
V_LT_INF = V_LT | V_OVERFLOW,
//! \hideinitializer A positive integer overflow occurred (rounding down).
V_GT_SUP = V_GT | V_OVERFLOW,
//! \hideinitializer A positive integer overflow occurred (rounding up).
V_LT_PLUS_INFINITY = V_LT | VC_PLUS_INFINITY,
//! \hideinitializer A negative integer overflow occurred (rounding down).
V_GT_MINUS_INFINITY = V_GT | VC_MINUS_INFINITY,
//! \hideinitializer Negative infinity result.
V_EQ_MINUS_INFINITY = V_EQ | VC_MINUS_INFINITY,
//! \hideinitializer Positive infinity result.
V_EQ_PLUS_INFINITY = V_EQ | VC_PLUS_INFINITY,
//! \hideinitializer Not a number result.
V_NAN = VC_NAN,
//! \hideinitializer Converting from unknown string.
V_CVT_STR_UNK = V_NAN | (1 << 8),
//! \hideinitializer Dividing by zero.
V_DIV_ZERO = V_NAN | (2 << 8),
//! \hideinitializer Adding two infinities having opposite signs.
V_INF_ADD_INF = V_NAN | (3 << 8),
//! \hideinitializer Dividing two infinities.
V_INF_DIV_INF = V_NAN | (4 << 8),
//! \hideinitializer Taking the modulus of an infinity.
V_INF_MOD = V_NAN | (5 << 8),
//! \hideinitializer Multiplying an infinity by zero.
V_INF_MUL_ZERO = V_NAN | (6 << 8),
//! \hideinitializer Subtracting two infinities having the same sign.
V_INF_SUB_INF = V_NAN | (7 << 8),
//! \hideinitializer Computing a remainder modulo zero.
V_MOD_ZERO = V_NAN | (8 << 8),
//! \hideinitializer Taking the square root of a negative number.
V_SQRT_NEG = V_NAN | (9 << 8),
//! \hideinitializer Unknown result due to intermediate negative overflow.
V_UNKNOWN_NEG_OVERFLOW = V_NAN | (10 << 8),
//! \hideinitializer Unknown result due to intermediate positive overflow.
V_UNKNOWN_POS_OVERFLOW = V_NAN | (11 << 8),
//! \hideinitializer The computed result is not representable.
V_UNREPRESENTABLE = 1 << 7
};
//! Extracts the value class part of \p r (representable number, unrepresentable minus/plus infinity or nan).
Result_Class result_class(Result r);
//! Extracts the relation part of \p r.
Result_Relation result_relation(Result r);
} // namespace Parma_Polyhedra_Library
#include "Result.inlines.hh"
#endif // !defined(PPL_Result_defs_hh)
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