aboutsummaryrefslogtreecommitdiffstats
path: root/tmk_core/common/sendchar.h
blob: 7a64d00c7f7aade309906eb737f411c5a227835b (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

/*
Copyright 2011 Jun Wako <wakojun@gmail.com>

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 <http://www.gnu.org/licenses/>.
*/

#ifndef SENDCHAR_H
#define SENDCHAR_H

#include <stdint.h>


#ifdef __cplusplus
extern "C" {
#endif

/* transmit a character.  return 0 on success, -1 on error. */
int8_t sendchar(uint8_t c);

#ifdef __cplusplus
}
#endif

#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-28 21:49:51 +0000
ss */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
--  Netlist utilities (composed of a few calls).
--  Copyright (C) 2017 Tristan Gingold
--
--  This file is part of GHDL.
--
--  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, write to the Free Software
--  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
--  MA 02110-1301, USA.

package body Netlists.Utils is
   function Get_Nbr_Inputs (Inst : Instance) return Port_Nbr
   is
      M : constant Module := Get_Module (Inst);
   begin
      if Is_Self_Instance (Inst) then
         return Get_Nbr_Outputs (M);
      else
         return Get_Nbr_Inputs (M);
      end if;
   end Get_Nbr_Inputs;

   function Get_Nbr_Outputs (Inst : Instance) return Port_Nbr
   is
      M : constant Module := Get_Module (Inst);
   begin
      if Is_Self_Instance (Inst) then
         return Get_Nbr_Inputs (M);
      else
         return Get_Nbr_Outputs (M);
      end if;
   end Get_Nbr_Outputs;

   function Get_Nbr_Params (Inst : Instance) return Param_Nbr
   is
      M : constant Module := Get_Module (Inst);
   begin
      return Get_Nbr_Params (M);
   end Get_Nbr_Params;

   function Get_Param_Desc
     (Inst : Instance; Param : Param_Idx) return Param_Desc is
   begin
      return Get_Param_Desc (Get_Module (Inst), Param);
   end Get_Param_Desc;

   function Get_Id (Inst : Instance) return Module_Id is
   begin
      return Get_Id (Get_Module (Inst));
   end Get_Id;

   function Get_Input_Name (M : Module; I : Port_Idx) return Sname is
   begin
      return Get_Input_Desc (M, I).Name;
   end Get_Input_Name;

   function Get_Output_Name (M : Module; I : Port_Idx) return Sname is
   begin
      return Get_Output_Desc (M, I).Name;
   end Get_Output_Name;

   function Is_Connected (O : Net) return Boolean is
   begin
      return Get_First_Sink (O) /= No_Input;
   end Is_Connected;

   function Has_One_Connection (O : Net) return Boolean
   is
      Inp : Input;
   begin
      Inp := Get_First_Sink (O);
      if Inp = No_Input then
         --  No connection.
         return False;
      end if;
      Inp := Get_Next_Sink (Inp);
      return Inp = No_Input;
   end Has_One_Connection;

   procedure Disconnect_And_Free (I : Input)
   is
      I_Net : constant Net := Get_Driver (I);
      Inst : constant Instance := Get_Net_Parent (I_Net);
      Nbr_Inputs : Port_Nbr;
      Nbr_Outputs : Port_Nbr;
   begin
      --  First disconnect.
      Disconnect (I);

      --  Quick check: is output (of I) still used ?
      if Is_Connected (I_Net) then
         return;
      end if;

      --  Check that all outputs are unused.
      Nbr_Outputs := Get_Nbr_Outputs (Inst);
      if Nbr_Outputs > 1 then
         for K in 0 .. Nbr_Outputs - 1 loop
            if Is_Connected (Get_Output (Inst, K)) then
               return;
            end if;
         end loop;
      end if;

      --  First disconnect inputs.
      Nbr_Inputs := Get_Nbr_Inputs (Inst);
      if Nbr_Inputs > 0 then
         for K in 0 .. Nbr_Inputs - 1 loop
            Disconnect_And_Free (Get_Input (Inst, K));
         end loop;
      end if;

      --  Free Inst
      Free_Instance (Inst);
   end Disconnect_And_Free;

   function Is_Unused_Instance (Inst : Instance) return Boolean
   is
      Nbr_Outputs : constant Port_Idx := Get_Nbr_Outputs (Inst);
      N : Net;
   begin
      --  An instance without outputs is considered as used.
      if Nbr_Outputs = 0 then
         return False;
      end if;

      for Idx in 0 .. Nbr_Outputs - 1 loop
         N := Get_Output (Inst, Idx);
         if Is_Connected (N) then
            --  Connected output.
            return False;
         end if;
      end loop;

      --  All outputs are unconnected.
      return True;
   end Is_Unused_Instance;

   procedure Remove_Unused_Instances (M : Module)
   is
      pragma Assert (Is_Valid (M));
      Inst : Instance;
   begin
      Extract_All_Instances (M, Inst);

      --  Add the self instance (the first one).
      Append_Instance (M, Inst);
      Inst := Get_Next_Instance (Inst);

      while Inst /= No_Instance loop
         if not (Get_Id (Inst) = Id_Free
                   or else Is_Unused_Instance (Inst))
         then
            --  Keep this used instance.
            Append_Instance (M, Inst);
         end if;
         Inst := Get_Next_Instance (Inst);
      end loop;
   end Remove_Unused_Instances;

   procedure Remove_Free_Instances (M : Module)
   is
      pragma Assert (Is_Valid (M));
      Inst : Instance;
   begin
      Extract_All_Instances (M, Inst);

      while Inst /= No_Instance loop
         if Get_Id (Inst) /= Id_Free then
            Append_Instance (M, Inst);
         end if;
         Inst := Get_Next_Instance (Inst);
      end loop;
   end Remove_Free_Instances;
end Netlists.Utils;
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-28 21:49:51 +0000