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Library of reusable VHDL components
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libvhdl/test/OSVVM/SortListPkg_int.vhd

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--
-- File Name: SortListPkg_int.vhd
-- Design Unit Name: SortListPkg_int
-- Revision: STANDARD VERSION, revision 2014.01
--
-- Maintainer: Jim Lewis email: jim@synthworks.com
-- Contributor(s):
-- Jim Lewis jim@synthworks.com
--
-- Description:
-- Sorting utility for array of scalars
-- Uses protected type so as to shrink and expand the data structure
--
-- Developed for:
-- SynthWorks Design Inc.
-- VHDL Training Classes
-- 11898 SW 128th Ave. Tigard, Or 97223
-- http://www.SynthWorks.com
--
-- Revision History:
-- Date Version Description
-- 06/2008: 0.1 Initial revision
-- Numerous revisions for VHDL Testbenches and Verification
-- 02/2009: 1.0 First Public Released Version
-- 02/25/2009 1.1 Replaced reference to std_2008 with a reference to
-- ieee_proposed.standard_additions.all ;
-- 06/16/2010 1.2 Added EraseList parameter to to_array
-- 3/2011 2.0 added inside as non protected type
-- 6/2011 2.1 added sort as non protected type
-- 4/2013 2013.04 No Changes
-- 5/2013 2013.05 No changes of substance.
-- Deleted extra variable declaration in procedure remove
-- 1/2014 2014.01 Added RevSort. Added AllowDuplicate paramter to Add procedure
--
--
--
-- Copyright (c) 2008 - 2014 by SynthWorks Design Inc. All rights reserved.
--
-- Verbatim copies of this source file may be used and
-- distributed without restriction.
--
-- This source file is free software; you can redistribute it
-- and/or modify it under the terms of the ARTISTIC License
-- as published by The Perl Foundation; either version 2.0 of
-- the License, or (at your option) any later version.
--
-- This source 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 Artistic License for details.
--
-- You should have received a copy of the license with this source.
-- If not download it from,
-- http://www.perlfoundation.org/artistic_license_2_0
--
use std.textio.all ;
library ieee ;
use ieee.std_logic_1164.all ;
use ieee.numeric_std.all ;
use ieee.std_logic_textio.all ;
-- comment out following 2 lines with VHDL-2008. Leave in for VHDL-2002
-- library ieee_proposed ; -- remove with VHDL-2008
-- use ieee_proposed.standard_additions.all ; -- remove with VHDL-2008
package SortListPkg_int is
-- with VHDL-2008, convert package to generic package
-- convert subtypes ElementType and ArrayofElementType to generics
-- package SortListGenericPkg is
subtype ElementType is integer ;
subtype ArrayofElementType is integer_vector ;
function inside (constant E : ElementType; constant A : in ArrayofElementType) return boolean ;
impure function sort (constant A : in ArrayofElementType) return ArrayofElementType ;
impure function revsort (constant A : in ArrayofElementType) return ArrayofElementType ;
type SortListPType is protected
procedure add ( constant A : in ElementType ; constant AllowDuplicate : Boolean := FALSE ) ;
procedure add ( constant A : in ArrayofElementType ) ;
procedure add ( constant A : in ArrayofElementType ; Min, Max : integer ) ;
procedure add ( variable A : inout SortListPType ) ;
-- Count items in list
impure function count return integer ;
impure function find_index ( constant A : ElementType) return integer ;
impure function inside (constant A : ElementType) return boolean ;
procedure insert ( constant A : in ElementType; constant index : in integer := 1 ) ;
impure function get ( constant index : in integer := 1 ) return ElementType ;
procedure erase ;
impure function Empty return boolean ;
procedure print ;
procedure remove ( constant A : in ElementType ) ;
procedure remove ( constant A : in ArrayofElementType ) ;
procedure remove ( variable A : inout SortListPType ) ;
impure function to_array (constant EraseList : boolean := FALSE) return ArrayofElementType ;
impure function to_rev_array (constant EraseList : boolean := FALSE) return ArrayofElementType ;
end protected SortListPType ;
end SortListPkg_int ;
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
package body SortListPkg_int is
function inside (constant E : ElementType; constant A : in ArrayofElementType) return boolean is
begin
for i in A'range loop
if E = A(i) then
return TRUE ;
end if ;
end loop ;
return FALSE ;
end function inside ;
type SortListPType is protected body
type ListType ;
type ListPointerType is access ListType ;
type ListType is record
A : ElementType ;
-- item_num : integer ;
NextPtr : ListPointerType ;
-- PrevPtr : ListPointerType ;
end record ;
variable HeadPointer : ListPointerType := NULL ;
-- variable TailPointer : ListPointerType := NULL ;
procedure add ( constant A : in ElementType ; constant AllowDuplicate : Boolean := FALSE ) is
variable CurPtr, tempPtr : ListPointerType ;
begin
if HeadPointer = NULL then
HeadPointer := new ListType'(A, NULL) ;
elsif A = HeadPointer.A then -- ignore duplicates
if AllowDuplicate then
tempPtr := HeadPointer ;
HeadPointer := new ListType'(A, tempPtr) ;
end if ;
elsif A < HeadPointer.A then
tempPtr := HeadPointer ;
HeadPointer := new ListType'(A, tempPtr) ;
else
CurPtr := HeadPointer ;
AddLoop : loop
exit AddLoop when CurPtr.NextPtr = NULL ;
exit AddLoop when A < CurPtr.NextPtr.A ;
if A = CurPtr.NextPtr.A then
if AllowDuplicate then
exit AddLoop ; -- insert
else
return ; -- return without insert
end if;
end if ;
CurPtr := CurPtr.NextPtr ;
end loop AddLoop ;
tempPtr := CurPtr.NextPtr ;
CurPtr.NextPtr := new ListType'(A, tempPtr) ;
end if ;
end procedure add ;
procedure add ( constant A : in ArrayofElementType ) is
begin
for i in A'range loop
add(A(i)) ;
end loop ;
end procedure add ;
procedure add ( constant A : in ArrayofElementType ; Min, Max : integer ) is
begin
for i in A'range loop
if A(i) >= Min and A(i) <= Max then
add(A(i)) ;
end if ;
end loop ;
end procedure add ;
procedure add ( variable A : inout SortListPType ) is
begin
for i in 1 to A.Count loop
add(A.Get(i)) ;
end loop ;
end procedure add ;
-- Count items in list
impure function count return integer is
variable result : positive := 1 ;
variable CurPtr : ListPointerType ;
begin
if HeadPointer = NULL then
return 0 ;
else
CurPtr := HeadPointer ;
loop
exit when CurPtr.NextPtr = NULL ;
result := result + 1 ;
CurPtr := CurPtr.NextPtr ;
end loop ;
return result ;
end if ;
end function count ;
impure function find_index (constant A : ElementType) return integer is
variable result : positive := 2 ;
variable CurPtr : ListPointerType ;
begin
if HeadPointer = NULL then
return 0 ;
elsif A <= HeadPointer.A then
return 1 ;
else
CurPtr := HeadPointer ;
loop
exit when CurPtr.NextPtr = NULL ;
exit when A <= CurPtr.NextPtr.A ;
result := result + 1 ;
CurPtr := CurPtr.NextPtr ;
end loop ;
return result ;
end if ;
end function find_index ;
impure function inside (constant A : ElementType) return boolean is
variable CurPtr : ListPointerType ;
begin
if HeadPointer = NULL then
return FALSE ;
end if ;
if A = HeadPointer.A then
return TRUE ;
else
CurPtr := HeadPointer ;
loop
exit when CurPtr.NextPtr = NULL ;
exit when A < CurPtr.NextPtr.A ;
if A = CurPtr.NextPtr.A then
return TRUE ; -- exit
end if;
CurPtr := CurPtr.NextPtr ;
end loop ;
end if ;
return FALSE ;
end function inside ;
procedure insert( constant A : in ElementType; constant index : in integer := 1 ) is
variable CurPtr, tempPtr : ListPointerType ;
begin
if index <= 1 then
tempPtr := HeadPointer ;
HeadPointer := new ListType'(A, tempPtr) ;
else
CurPtr := HeadPointer ;
for i in 3 to index loop
exit when CurPtr.NextPtr = NULL ; -- end of list
CurPtr := CurPtr.NextPtr ;
end loop ;
tempPtr := CurPtr.NextPtr ;
CurPtr.NextPtr := new ListType'(A, tempPtr) ;
end if;
end procedure insert ;
impure function get ( constant index : in integer := 1 ) return ElementType is
variable CurPtr : ListPointerType ;
begin
if index > Count then
report "%%FAILURE: SortListPType index out of range" severity failure ;
return ElementType'left ;
elsif HeadPointer = NULL then
return ElementType'left ;
elsif index <= 1 then
return HeadPointer.A ;
else
CurPtr := HeadPointer ;
for i in 2 to index loop
CurPtr := CurPtr.NextPtr ;
end loop ;
return CurPtr.A ;
end if;
end function get ;
procedure erase (variable CurPtr : inout ListPointerType ) is
begin
if CurPtr.NextPtr /= NULL then
erase (CurPtr.NextPtr) ;
end if ;
deallocate (CurPtr) ;
end procedure erase ;
procedure erase is
begin
if HeadPointer /= NULL then
erase(HeadPointer) ;
-- deallocate (HeadPointer) ;
HeadPointer := NULL ;
end if;
end procedure erase ;
impure function Empty return boolean is
begin
return HeadPointer = NULL ;
end Empty ;
procedure print is
variable buf : line ;
variable CurPtr : ListPointerType ;
begin
if HeadPointer = NULL then
write (buf, string'("( )")) ;
else
CurPtr := HeadPointer ;
write (buf, string'("(")) ;
loop
write (buf, CurPtr.A) ;
exit when CurPtr.NextPtr = NULL ;
write (buf, string'(", ")) ;
CurPtr := CurPtr.NextPtr ;
end loop ;
write (buf, string'(")")) ;
end if ;
writeline(OUTPUT, buf) ;
end procedure print ;
procedure remove ( constant A : in ElementType ) is
variable CurPtr, tempPtr : ListPointerType ;
begin
if HeadPointer = NULL then
return ;
elsif A = HeadPointer.A then
tempPtr := HeadPointer ;
HeadPointer := HeadPointer.NextPtr ;
deallocate (tempPtr) ;
else
CurPtr := HeadPointer ;
loop
exit when CurPtr.NextPtr = NULL ;
if A = CurPtr.NextPtr.A then
tempPtr := CurPtr.NextPtr ;
CurPtr.NextPtr := CurPtr.NextPtr.NextPtr ;
deallocate (tempPtr) ;
exit ;
end if ;
exit when A < CurPtr.NextPtr.A ;
CurPtr := CurPtr.NextPtr ;
end loop ;
end if ;
end procedure remove ;
procedure remove ( constant A : in ArrayofElementType ) is
begin
for i in A'range loop
remove(A(i)) ;
end loop ;
end procedure remove ;
procedure remove ( variable A : inout SortListPType ) is
begin
for i in 1 to A.Count loop
remove(A.Get(i)) ;
end loop ;
end procedure remove ;
impure function to_array (constant EraseList : boolean := FALSE) return ArrayofElementType is
variable result : ArrayofElementType(1 to Count) ;
begin
for i in 1 to Count loop
result(i) := Get(i) ;
end loop ;
if EraseList then
erase ;
end if ;
return result ;
end function to_array ;
impure function to_rev_array (constant EraseList : boolean := FALSE) return ArrayofElementType is
variable result : ArrayofElementType(Count downto 1) ;
begin
for i in 1 to Count loop
result(i) := Get(i) ;
end loop ;
if EraseList then
erase ;
end if ;
return result ;
end function to_rev_array ;
end protected body SortListPType ;
impure function sort (constant A : in ArrayofElementType) return ArrayofElementType is
variable Result : SortListPType ;
begin
for i in A'range loop
Result.Add(A(i), TRUE) ;
end loop ;
return Result.to_array(EraseList => TRUE) ;
end function sort ;
impure function revsort (constant A : in ArrayofElementType) return ArrayofElementType is
variable Result : SortListPType ;
begin
for i in A'range loop
Result.Add(A(i), TRUE) ;
end loop ;
return Result.to_rev_array(EraseList => TRUE) ;
end function revsort ;
end SortListPkg_int ;