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-- GHDL Run Time (GRT) - analog solver.
-- Copyright (C) 2022 Tristan Gingold
--
-- This program 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 2 of the License, or
-- (at your option) any later version.
--
-- This program 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, see <gnu.org/licenses>.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with Grt.Types; use Grt.Types;
package Grt.Analog_Solver is
type F64_Array is array (Natural range <>) of Ghdl_F64;
subtype F64_Fat_Array is F64_Array (Natural);
-- A pointer to an F64 array.
type F64_C_Arr_Ptr is access all F64_Fat_Array;
pragma Convention (C, F64_C_Arr_Ptr);
-- Initialize the analog solver, SIZE is the number of scalar quantities.
procedure Init (Size : Ghdl_I32);
-- Return the address of the initial values vector and derivative vector.
function Get_Init_Val_Ptr return F64_C_Arr_Ptr;
function Get_Init_Der_Ptr return F64_C_Arr_Ptr;
-- Finish initialization.
procedure Start;
procedure Residues (T : Ghdl_F64;
Y : F64_C_Arr_Ptr;
Yp : F64_C_Arr_Ptr;
Res : F64_C_Arr_Ptr);
pragma Import (C, Residues, "grt__analog_solver__residues");
procedure Set_Root_Size (Size : Ghdl_I32);
procedure Roots (T : Ghdl_F64;
Y : F64_C_Arr_Ptr;
Yp: F64_C_Arr_Ptr;
Res : F64_C_Arr_Ptr);
pragma Import (C, Roots, "grt__analog_solver__roots");
procedure Set_Values (Y : F64_C_Arr_Ptr;
Yp: F64_C_Arr_Ptr);
pragma Import (C, Set_Values, "grt__analog_solver__set_values");
-- Return status:
-- 0: Ok, Tn reached
-- 1: Stopped due to zero crossing
-- 2: failure
procedure Solve (T : Ghdl_F64; Tn : in out Ghdl_F64; Res : out Integer);
procedure Finish;
end Grt.Analog_Solver;
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