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(*
History++ plugin for Miranda IM: the free IM client for Microsoft* Windows*
Copyright (C) 2006-2009 theMIROn, 2003-2006 Art Fedorov.
History+ parts (C) 2001 Christian Kastner
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
unit hpp_arrays;
interface
uses hpp_jclSysUtils, hpp_global;
function IntSortedArray_Add(var A: TIntArray; Value: Integer): Integer;
procedure IntSortedArray_Remove(var A: TIntArray; Value: Integer);
function IntSortedArray_Find(var A: TIntArray; Value: Integer): Integer;
procedure IntSortedArray_Sort(var A: TIntArray);
function IntSortedArray_NonIntersect(var A, B: TIntArray): TIntArray;
procedure IntArrayRemove(var A: TIntArray; Index: Integer);
procedure IntArrayInsert(var A: TIntArray; Index: Integer; Value: Integer);
implementation
procedure IntArrayRemove(var A: TIntArray; Index: Integer);
var
i: Integer;
begin
for i := Index to Length(A) - 2 do
A[i] := A[i + 1];
SetLength(A, Length(A) - 1);
end;
procedure IntArrayInsert(var A: TIntArray; Index: Integer; Value: Integer);
var
i: Integer;
begin
SetLength(A, Length(A) + 1);
for i := Length(A) - 1 downto Index do
A[i] := A[i - 1];
A[Index] := Value;
end;
function IntSortedArray_Add(var A: TIntArray; Value: Integer): Integer;
begin
Result := SearchDynArray(A, SizeOf(Integer), DynArrayCompareInteger, @Value, True);
if Result <> -1 then // we have nearest or match
begin
if A[Result] = Value then
exit;
if A[Result] < Value then
Inc(Result);
end
else // we don't have any nearest values, array is empty
Result := 0;
IntArrayInsert(A, Result, Value);
end;
procedure IntSortedArray_Remove(var A: TIntArray; Value: Integer);
var
idx: Integer;
begin
idx := SearchDynArray(A, SizeOf(Integer), DynArrayCompareInteger, @Value);
if idx = -1 then
exit;
IntArrayRemove(A, idx);
end;
function IntSortedArray_Find(var A: TIntArray; Value: Integer): Integer;
begin
Result := SearchDynArray(A, SizeOf(Integer), DynArrayCompareInteger, @Value);
end;
procedure IntSortedArray_Sort(var A: TIntArray);
begin
SortDynArray(A, SizeOf(Integer), DynArrayCompareInteger);
end;
function IntSortedArray_NonIntersect(var A, B: TIntArray): TIntArray;
var
ia, ib: Integer;
lenr, lena, lenb: Integer;
procedure AddToResult(Item: Integer);
begin
Inc(lenr);
SetLength(Result, lenr);
Result[lenr - 1] := Item;
end;
begin
SetLength(Result, 0);
lenr := 0;
lena := Length(A);
lenb := Length(B);
ib := 0;
ia := 0;
while ia < lena do
begin
if ib >= lenb then
begin
AddToResult(A[ia]);
Inc(ia);
continue;
end;
if A[ia] = B[ib] then
begin
Inc(ib);
Inc(ia);
continue;
end;
if A[ia] > B[ib] then
begin
while A[ia] > B[ib] do
begin
AddToResult(B[ib]);
Inc(ib);
if ib >= lenb then
break;
end;
continue;
end;
if A[ia] < B[ib] then
begin
AddToResult(A[ia]);
Inc(ia);
continue;
end;
end;
while ib < lenb do
begin
AddToResult(B[ib]);
Inc(ib);
end;
end;
end.
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