aboutsummaryrefslogtreecommitdiffstats
path: root/src/vhdl/iir_chain_handling.adb
diff options
context:
space:
mode:
Diffstat (limited to 'src/vhdl/iir_chain_handling.adb')
-rw-r--r--src/vhdl/iir_chain_handling.adb68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/vhdl/iir_chain_handling.adb b/src/vhdl/iir_chain_handling.adb
new file mode 100644
index 000000000..1e70a366a
--- /dev/null
+++ b/src/vhdl/iir_chain_handling.adb
@@ -0,0 +1,68 @@
+-- Generic package to handle chains.
+-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
+--
+-- GHDL 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, or (at your option) any later
+-- version.
+--
+-- GHDL 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 GHDL; see the file COPYING. If not, write to the Free
+-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+-- 02111-1307, USA.
+package body Iir_Chain_Handling is
+ procedure Build_Init (Last : out Iir) is
+ begin
+ Last := Null_Iir;
+ end Build_Init;
+
+ procedure Build_Init (Last : out Iir; Parent : Iir)
+ is
+ El : Iir;
+ begin
+ El := Get_Chain_Start (Parent);
+ if El /= Null_Iir then
+ loop
+ Last := El;
+ El := Get_Chain (El);
+ exit when El = Null_Iir;
+ end loop;
+ else
+ Last := Null_Iir;
+ end if;
+ end Build_Init;
+
+ procedure Append (Last : in out Iir; Parent : Iir; El : Iir) is
+ begin
+ if Last = Null_Iir then
+ Set_Chain_Start (Parent, El);
+ else
+ Set_Chain (Last, El);
+ end if;
+ Last := El;
+ end Append;
+
+ procedure Append_Subchain (Last : in out Iir; Parent : Iir; Els : Iir)
+ is
+ El : Iir;
+ begin
+ if Last = Null_Iir then
+ Set_Chain_Start (Parent, Els);
+ else
+ Set_Chain (Last, Els);
+ end if;
+ El := Els;
+ loop
+ Set_Parent (El, Parent);
+ Last := El;
+ El := Get_Chain (El);
+ exit when El = Null_Iir;
+ end loop;
+ end Append_Subchain;
+end Iir_Chain_Handling;
+