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------------------------------------------------------------------------------
-- --
-- ASIS Tester And iNTerpreter (ASIStant) COMPONENTS --
-- --
-- A S I S T A N T . E V A L U A T E --
-- --
-- B o d y --
-- --
-- Copyright (c) 1997-2006, Free Software Foundation, Inc. --
-- --
-- ASIStant is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 2, or (at your option) any later --
-- version. ASIStant is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MER- --
-- CHANTABILITY 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 distributed with GNAT; see file COPYING. If --
-- not, write to the Free Software Foundation, 51 Franklin Street, Fifth --
-- Floor, Boston, MA 02110-1301, USA. --
-- --
-- ASIStant is an evolution of ASIStint tool that was created by Vasiliy --
-- Fofanov as part of a collaboration between Software Engineering --
-- Laboratory of the Swiss Federal Institute of Technology in Lausanne, --
-- Switzerland, and the Scientific Research Computer Center of the Moscow --
-- University, Russia, supported by the Swiss National Science Foundation --
-- grant #7SUPJ048247, "Development of ASIS for GNAT with industry quality" --
-- --
-- ASIStant is distributed as a part of the ASIS implementation for GNAT --
-- (ASIS-for-GNAT) and is maintained by AdaCore (http://www.adacore.com). --
-- --
------------------------------------------------------------------------------
with ASIStant.Call; use ASIStant.Call;
with ASIStant.Common; use ASIStant.Common;
with ASIStant.XTable; use ASIStant.XTable;
package body ASIStant.Evaluate is
------------------------------------------------------------------------------
-- ASIStant expressions evaluation
------------------------------------------------------------------------------
function Evaluate_Node (NPtr : Node_Position) return Query_Result is
VI : Var_Info;
NPtr1, NPtrP : Node_Position;
begin
case CurStat.Tree (NPtr).NType is
when NT_BOOLEAN =>
return (Par_Boolean, Boolean'Val (CurStat.Tree (NPtr).IValue));
when NT_INTEGER =>
return (Par_Integer,
Integer'Wide_Value (CurStat.Tree (NPtr).SValue.all));
when NT_STRING =>
return (Par_String, Save_String (CurStat.Tree (NPtr).SValue.all));
when NT_VARIABLE =>
VI := Get_Var (CurTable, CurStat.Tree (NPtr).SValue.all);
if VI /= Var_Unknown then
return Get_Var_Value (VI);
else
return Call_ASIStant_Function
(CurStat.Tree (NPtr).SValue.all, Empty_Parameter_Set);
end if;
when NT_FUNCTION =>
VI := Get_Var (CurTable, CurStat.Tree (NPtr).SValue.all);
if VI /= Var_Unknown then
-- An indexing
if VI.VType /= Par_ElemList and then
VI.VType /= Par_CUnitList and then
VI.VType /= Par_Line_List and then
VI.VType /= Par_DDA_Array_Component_List and then
VI.VType /= Par_DDA_Record_Component_List then
Error (ERR_BADVARTYPE);
end if;
NPtr1 := CurStat.Tree (NPtr).NValue;
NPtr1 := CurStat.Tree (NPtr1).NValue;
if CurStat.Tree (NPtr1).Next_Node /= 0 then
Error (ERR_BADLISTELEM);
end if;
declare
QR : constant Query_Result := Evaluate_Node (NPtr1);
begin
if QR.RType /= Par_Integer then
Error (ERR_BADLISTELEM);
end if;
if VI.VType = Par_ElemList then
return (Par_Element, ATIElemList (VI.IValue).all (QR.I));
elsif VI.VType = Par_CUnitList then
return (Par_CUnit, ATICUnitList (VI.IValue).all (QR.I));
elsif VI.VType = Par_Line_List then
return (Par_Line, ATILineList (VI.IValue).all (QR.I));
elsif VI.VType = Par_DDA_Array_Component_List then
return (Par_DDA_Array_Component,
DDA_ArrCList (VI.IValue).all (QR.I));
elsif VI.VType = Par_DDA_Record_Component_List then
return (Par_DDA_Record_Component,
DDA_RecCList (VI.IValue).all (QR.I));
else
Error (ERR_INTERNAL);
end if;
exception
when Constraint_Error =>
Error (ERR_NOTINRANGE);
end;
else
-- A query call
declare
PS : Parameter_Set;
begin
-- Determine syntax
NPtrP := CurStat.Tree (NPtr).NValue;
for i in Parameter_Range loop
NPtr1 := CurStat.Tree (NPtrP).NValue;
PS (i) := Evaluate_Node (NPtr1);
NPtrP := CurStat.Tree (NPtrP).Next_Node;
exit when NPtrP = 0;
end loop;
if NPtrP /= 0 then
Error (ERR_TOOMANYPARAMS);
end if;
return Call_ASIStant_Function
(CurStat.Tree (NPtr).SValue.all, PS);
end;
end if;
when others =>
Error (ERR_INTERNAL, "Module : Evaluate. ST node : " &
Node_Type'Wide_Image (CurStat.Tree (NPtr).NType));
end case;
end Evaluate_Node;
end ASIStant.Evaluate;
|
