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{**********************************************************************}
{ }
{ "The contents of this file are subject to the Mozilla Public }
{ License Version 1.1 (the "License"); you may not use this }
{ file except in compliance with the License. You may obtain }
{ a copy of the License at http://www.mozilla.org/MPL/ }
{ }
{ Software distributed under the License is distributed on an }
{ "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express }
{ or implied. See the License for the specific language }
{ governing rights and limitations under the License. }
{ }
{ Copyright Creative IT. }
{ Current maintainer: Eric Grange }
{ }
{**********************************************************************}
unit dwsUtils;

{$I dws.inc}

interface

uses
Classes, SysUtils, Variants, Types, StrUtils, Masks,
dwsStrings, dwsXPlatform, Math;

type

// TRefCountedObject
//
// Uses Monitor hidden field to store refcount, so not compatible with monitor use
// (but Monitor is buggy, so no great loss)
TRefCountedObject = class
private
{$ifdef FPC}
FRefCount : Integer;
{$endif}
function GetRefCount : Integer; inline;
procedure SetRefCount(n : Integer); inline;
public
function IncRefCount : Integer; inline;
function DecRefCount : Integer;
property RefCount : Integer read GetRefCount write SetRefCount;
procedure Free;
end;

// IGetSelf
//
IGetSelf = interface
['{77D8EA0B-311C-422B-B8DE-AA5BDE726E41}']
function GetSelf : TObject;
function ToString : String;
end;

// TInterfacedSelfObject
//
TInterfacedSelfObject = class (TRefCountedObject, IUnknown, IGetSelf)
protected
function GetSelf : TObject;
function QueryInterface({$IFDEF FPC_HAS_CONSTREF}constref{$ELSE}const{$ENDIF} IID: TGUID; out Obj): HResult; stdcall;
function _AddRef : Integer; stdcall;
function _Release : Integer; stdcall;

public
class function NewInstance: TObject; override;
procedure AfterConstruction; override;
procedure BeforeDestruction; override;
end;

// IAutoStrings
//
IAutoStrings = interface
function GetValue : TStringList;
property Value : TStringList read GetValue;
function Clone : IAutoStrings;
end;

// TAutoStrings
//
TAutoStrings = class(TInterfacedSelfObject, IAutoStrings)
private
FValue : TStringList;
protected
function GetValue : TStringList;
function Clone : IAutoStrings;
public
constructor Create;
constructor CreateCapture(value : TStringList);
constructor CreateClone(value : TStringList);
destructor Destroy; override;
end;

// TVarRecArrayContainer
//
TVarRecArrayContainer = class
private
FIntegers : array of Int64;
FFloats : array of Extended;
FStrings : array of UnicodeString;

function AddVarRec : PVarRec;

public
VarRecArray : array of TVarRec;

constructor Create; overload;
constructor Create(const variantArray : array of Variant); overload;

procedure Add(const v : Variant);
procedure AddBoolean(const b : Boolean);
procedure AddInteger(const i : Int64);
procedure AddFloat(const f : Double);
procedure AddString(const s : UnicodeString);

procedure Initialize;
end;

// TTightList
//
{: Compact list embedded in a record.<p>
If the list holds only 1 item, no dynamic memory is allocated
(the list pointer is used).
Make sure to Clear or Clean in the destructor of the Owner. }
TTightListArray = array [0..MaxInt shr 4] of TRefCountedObject;
PObjectTightList = ^TTightListArray;
TTightList = record
private
FList : PObjectTightList;

procedure RaiseIndexOutOfBounds;
function GetList : PObjectTightList; inline;

public
FCount : Integer; // exposed so it can be used for direct property access

property List : PObjectTightList read GetList;
property Count : Integer read FCount;

procedure Free; // to posture as a regular TList
procedure Clean; // clear the list and free the item objects
procedure Clear; // clear the list without freeing the items
function Add(item : TRefCountedObject) : Integer;
procedure Assign(const aList : TTightList);
function IndexOf(item : TRefCountedObject) : Integer;
function Remove(item : TRefCountedObject) : Integer;
procedure Delete(index : Integer);
procedure Insert(index : Integer; item : TRefCountedObject);
procedure MoveItem(curIndex, newIndex : Integer); // Note: D2009 fails if this method is called Move (!) - HV
procedure Exchange(index1, index2 : Integer);
end;

// TTightStack
//
{: Embeddable stack functionality }
TTightStack = record
private
FList : PObjectTightList;
FCount : Integer;
FCapacity : Integer;

procedure Grow;

public
procedure Push(item : TRefCountedObject); inline;
function Peek : TRefCountedObject; inline;
procedure Pop; inline;

procedure Clear; inline;
procedure Clean;
procedure Free;

property List : PObjectTightList read FList;
property Count : Integer read FCount;
end;

TSimpleCallbackStatus = (csContinue, csAbort);

TSimpleCallback<T> = function (var item : T) : TSimpleCallbackStatus;

// TSimpleList<T>
//
{: A minimalistic generic list class. }
TSimpleList<T> = class
private
type
ArrayT = array of T;
var
FItems : ArrayT;
FCount : Integer;
FCapacity : Integer;
protected
procedure Grow;
function GetItems(const idx : Integer) : T; {$IFDEF DELPHI_2010_MINUS}{$ELSE} inline; {$ENDIF}
procedure SetItems(const idx : Integer; const value : T);
public
procedure Add(const item : T);
procedure Extract(idx : Integer);
procedure Clear;
procedure Enumerate(const callback : TSimpleCallback<T>);
property Items[const position : Integer] : T read GetItems write SetItems; default;
property Count : Integer read FCount;
end;

// TObjectList
//
{: A simple generic object list, owns objects }
TObjectList<T{$IFNDEF FPC}: TRefCountedObject{$ENDIF}> = class
private
type ArrayT = array of T;
var
FItems : ArrayT;
FCount : Integer;
protected
function GetItem(index : Integer) : T;
procedure SetItem(index : Integer; const item : T);
public
destructor Destroy; override;
function Add(const anItem : T) : Integer;
function IndexOf(const anItem : T) : Integer;
function Extract(idx : Integer) : T;
procedure ExtractAll;
procedure Clear;
property Items[index : Integer] : T read GetItem write SetItem; default;
property Count : Integer read FCount;
end;

// TSortedList
//
{: List that maintains its elements sorted, subclasses must override Compare }
TSortedList<T{$IFNDEF FPC}: TRefCountedObject{$ENDIF}> = class
private
type ArrayT = array of T;
var
FItems : ArrayT;
FCount : Integer;
protected
function GetItem(index : Integer) : T;
function Find(const item : T; var index : Integer) : Boolean;
function Compare(const item1, item2 : T) : Integer; virtual; abstract;
procedure InsertItem(index : Integer; const anItem : T);
public
function Add(const anItem : T) : Integer;
function AddOrFind(const anItem : T; var added : Boolean) : Integer;
function Extract(const anItem : T) : Integer;
function ExtractAt(index : Integer) : T;
function IndexOf(const anItem : T) : Integer;
procedure Clear;
procedure Clean;
procedure Enumerate(const callback : TSimpleCallback<T>);
property Items[index : Integer] : T read GetItem; default;
property Count : Integer read FCount;
end;

// TSimpleStack<T>
//
{: A minimalistic generic stack.
Note that internal array items are NOT cleared on Pop, for refcounted types,
you need to clear yourself manually via Peek. }
TSimpleStack<T> = class
private
type ArrayT = array of T;
var
FItems : ArrayT;
FCount : Integer;
FCapacity : Integer;
protected
procedure Grow;
function GetPeek : T; inline;
procedure SetPeek(const item : T);
function GetItems(const position : Integer) : T;
procedure SetItems(const position : Integer; const value : T);
public
procedure Push(const item : T);
procedure Pop; inline;
procedure Clear;
property Peek : T read GetPeek write SetPeek;
property Items[const position : Integer] : T read GetItems write SetItems;
property Count : Integer read FCount;
end;

PSimpleIntegerStackChunk = ^TSimpleIntegerStackChunk;
TSimpleIntegerStackChunk = record
public
const ChunkSize = 16-2;
public
Data : array [0..ChunkSize-1] of Integer;
Prev : PSimpleIntegerStackChunk;
end;

// TSimpleIntegerStack
//
{: A minimalistic chunked integer stack.
Note that internal array items are NOT cleared on Pop, for refcounted types,
you need to clear yourself manually via Peek. }
TSimpleIntegerStack = class
private
FChunk : PSimpleIntegerStackChunk;
FChunkIndex : Integer;
FCount : Integer;
FPooledChunk : PSimpleIntegerStackChunk;
FBaseChunk : TSimpleIntegerStackChunk;

class var vTemplate : TSimpleIntegerStack;

protected
procedure Grow;
procedure Shrink;
function GetPeek : Integer; inline;
procedure SetPeek(const item : Integer); inline;

public
constructor Create;
destructor Destroy; override;
class function Allocate : TSimpleIntegerStack; static;

procedure Push(const item : Integer); inline;
procedure Pop; inline;
procedure Clear;
property Peek : Integer read GetPeek write SetPeek;
property Count : Integer read FCount;
end;

TSimpleHashBucket<T> = record
HashCode : Cardinal;
Value : T;
end;
TSimpleHashBucketArray<T> = array of TSimpleHashBucket<T>;
TSimpleHashProc<T> = procedure (const item : T) of object;

{: Minimalistic open-addressing hash, subclasses must override SameItem and GetItemHashCode.
HashCodes *MUST* be non zero }
TSimpleHash<T> = class
private
{$IFDEF DELPHI_XE3}
// workaround for XE3 compiler bug
FBuckets : array of TSimpleHashBucket<T>;
{$ELSE}
FBuckets : TSimpleHashBucketArray<T>;
{$ENDIF}
FCount : Integer;
FGrowth : Integer;
FCapacity : Integer;

protected
procedure Grow;
function LinearFind(const item : T; var index : Integer) : Boolean;
function SameItem(const item1, item2 : T) : Boolean; virtual; abstract;
// hashCode must be non-null
function GetItemHashCode(const item1 : T) : Integer; virtual; abstract;

public
function Add(const anItem : T) : Boolean; // true if added
function Replace(const anItem : T) : Boolean; // true if added
function Contains(const anItem : T) : Boolean;
function Match(var anItem : T) : Boolean;
procedure Enumerate(callBack : TSimpleHashProc<T>);
procedure Clear;

property Count : Integer read FCount;
end;

TSimpleObjectHash<T{$IFNDEF FPC}: TRefCountedObject{$ENDIF}> = class(TSimpleHash<T>)
protected
function SameItem(const item1, item2 : T) : Boolean; override;
function GetItemHashCode(const item1 : T) : Integer; override;

public
procedure Clean;
end;

TSimpleRefCountedObjectHash = class (TSimpleObjectHash<TRefCountedObject>);

TSimpleNameObjectHash<T{$IFNDEF FPC}: class{$ENDIF}> = class
type
TNameObjectHashBucket = record
HashCode : Cardinal;
Name : UnicodeString;
Obj : T;
end;
TNameObjectHashBuckets = array of TNameObjectHashBucket;

private
FBuckets : TNameObjectHashBuckets;
FCount : Integer;
FGrowth : Integer;
FCapacity : Integer;

protected
procedure Grow;
function SameItem(const item1, item2 : TNameObjectHashBucket) : Boolean;
function GetItemHashCode(const item1 : TNameObjectHashBucket) : Integer;

function GetObjects(const aName : UnicodeString) : T;
procedure SetObjects(const aName : UnicodeString; obj : T);
function GetBucketObject(index : Integer) : T;
procedure SetBucketObject(index : Integer; obj : T);
function GetBucketName(index : Integer) : String;

public
constructor Create(initialCapacity : Integer = 0);

function AddObject(const aName : UnicodeString; aObj : T; replace : Boolean = False) : Boolean;

procedure Clean;
procedure Clear;

property Objects[const aName : UnicodeString] : T read GetObjects write SetObjects; default;

property BucketObject[index : Integer] : T read GetBucketObject write SetBucketObject;
property BucketName[index : Integer] : String read GetBucketName;

property Count : Integer read FCount;
property Capacity : Integer read FCapacity;
end;

TObjectObjectHashBucket<TKey, TValue{$IFNDEF FPC}: TRefCountedObject{$ENDIF}> = record
Key : TKey;
Value : TValue;
end;

TSimpleObjectObjectHash<TKey, TValue{$IFNDEF FPC}: TRefCountedObject{$ENDIF}> = class
type
TObjectObjectHashBucket = record
HashCode : Cardinal;
Name : UnicodeString;
Key : TKey;
Value : TValue;
end;
TObjectObjectHashBuckets = array of TObjectObjectHashBucket;

private
FBuckets : TObjectObjectHashBuckets;
FCount : Integer;
FGrowth : Integer;
FCapacity : Integer;

protected
procedure Grow;
function GetItemHashCode(const item1 : TObjectObjectHashBucket) : Integer;
function LinearFind(const item : TObjectObjectHashBucket; var index : Integer) : Boolean;
function Match(var anItem : TObjectObjectHashBucket) : Boolean;
function Replace(const anItem : TObjectObjectHashBucket) : Boolean; // true if added

public
function GetValue(aKey : TKey) : TValue;
procedure SetValue(aKey : TKey; aValue : TValue);
procedure Clear;

procedure CleanValues;
end;

TObjectsLookup = class (TSortedList<TRefCountedObject>)
protected
function Compare(const item1, item2 : TRefCountedObject) : Integer; override;
end;

TStringUnifierBucket = record
Hash : Cardinal;
Str : UnicodeString;
end;
PStringUnifierBucket = ^TStringUnifierBucket;
TStringUnifierBuckets = array of TStringUnifierBucket;

TStringUnifier = class
private
FLock : TFixedCriticalSection;
FBuckets : TStringUnifierBuckets;
FCount : Integer;
FGrowth : Integer;
FCapacity : Integer;

protected
procedure Grow;

public
constructor Create;
destructor Destroy; override;

// aString must NOT be empty
procedure UnifyAssign(const aString : UnicodeString; h : Cardinal; var unifiedString : UnicodeString);

procedure Lock; inline;
procedure UnLock; inline;

property Count : Integer read FCount;
procedure Clear;
end;

TThreadCached<T> = class
private
FLock : TFixedCriticalSection;
FExpiresAt : TDateTime;
FMaxAge : TDateTime;
FOnNeedValue : TSimpleCallback<T>;
FValue : T;

protected
function GetValue : T;
procedure SetValue(const v : T);

public
constructor Create(const aNeedValue : TSimpleCallback<T>; maxAgeMSec : Integer);
destructor Destroy; override;

procedure Invalidate;

property Value : T read GetValue write SetValue;
end;

// TSimpleQueue<T>
//
{: A minimalistic generic queue.
Based on a linked list with an items pool, supports both FIFO & LIFO. }
TSimpleQueue<T> = class
private
type
PItemT = ^ItemT;
ItemT = record
Prev, Next : PItemT;
Value : T;
end;
var
FFirst, FLast : PItemT;
FCount : Integer;
FPool : PItemT;
FPoolLeft : Integer;

protected
function Alloc : PItemT;
procedure Release(i : PItemT);

public
constructor Create(poolSize : Integer = 8);
destructor Destroy; override;

// Adds to the end of the queue
procedure Push(const v : T);
// Removes from the end of the queue
function Pop(var v : T) : Boolean; overload;
function Pop : T; overload;
// Adds to the beginning of the queue
procedure Insert(const v : T);
// Removes from the beginning of the queue
function Pull(var v : T) : Boolean; overload;
function Pull : T; overload;

procedure Clear;

property Count : Integer read FCount;
end;

const
cWriteOnlyBlockStreamBlockSize = $2000 - 2*SizeOf(Pointer);

type

// TWriteOnlyBlockStream
//
{: Provides a write-only block-based stream. }
TWriteOnlyBlockStream = class (TStream)
private
FFirstBlock : PPointerArray;
FCurrentBlock : PPointerArray;
FBlockRemaining : PInteger;
FTotalSize : Integer;

protected
const cCRLF : array [0..1] of WideChar = (#13, #10);
const cAsciiCRLF : array [0..1] of AnsiChar = (#13, #10);

function GetSize: Int64; override;

procedure AllocateCurrentBlock;
procedure FreeBlocks;

procedure WriteSpanning(source : PByteArray; count : Integer);
procedure WriteLarge(source : PByteArray; count : Integer);
procedure WriteBuf(source : PByteArray; count : Integer);

public
constructor Create;
destructor Destroy; override;

class function AllocFromPool : TWriteOnlyBlockStream; static;
procedure ReturnToPool;

function Seek(Offset: Longint; Origin: Word): Longint; override;
function Read(var Buffer; Count: Longint): Longint; override;
function Write(const buffer; count: Longint): Longint; override;

procedure WriteByte(b : Byte); inline;
procedure WriteBytes(const b : array of Byte);
procedure WriteInt32(const i : Integer); inline;
procedure WriteDWord(const dw : DWORD); inline;

// must be strictly an utf16 UnicodeString
procedure WriteString(const utf16String : UnicodeString); overload; inline;
procedure WriteString(const i : Int32); overload; inline;
procedure WriteString(const i : Int64); overload; inline;
procedure WriteSubString(const utf16String : UnicodeString; startPos : Integer); overload;
procedure WriteSubString(const utf16String : UnicodeString; startPos, aLength : Integer); overload;
procedure WriteUTF8String(const utf8String : RawByteString); overload; inline;
procedure WriteCRLF; inline;
procedure WriteAsciiCRLF; inline;
procedure WriteChar(utf16Char : WideChar); inline;
procedure WriteDigits(value : Int64; digits : Integer);

// assumes data is an utf16 UnicodeString, spits out utf8 in FPC, utf16 in Delphi
function ToString : String; override;
function ToUTF8String : RawByteString;
function ToBytes : TBytes;
function ToRawBytes : RawByteString;

procedure Clear;

procedure StoreData(var buffer); overload;
procedure StoreData(destStream : TStream); overload;
procedure StoreUTF8Data(destStream : TStream); overload;
end;

TSimpleInt64List = class(TSimpleList<Int64>)
end;

TSimpleDoubleList = class(TSimpleList<Double>)
end;

TFastCompareStringList = class (TStringList)
{$ifdef FPC}
function DoCompareText(const s1,s2 : string) : PtrInt; override;
{$else}
function CompareStrings(const S1, S2: UnicodeString): Integer; override;
function IndexOfName(const name : UnicodeString): Integer; override;
{$endif}
end;

TFastCompareTextList = class (TStringList)
{$ifdef FPC}
function DoCompareText(const s1,s2 : string) : PtrInt; override;
{$else}
function CompareStrings(const S1, S2: UnicodeString): Integer; override;
function FindName(const name : UnicodeString; var index : Integer) : Boolean;
function IndexOfName(const name : UnicodeString): Integer; override;
{$endif}
end;

TClassCloneConstructor<T: class> = record
private
FTemplate : T;
FSize : Integer;
public
procedure Initialize(aTemplate : T);
procedure Finalize;
function Create : T; inline;
end;

ETightListOutOfBound = class(Exception)
end;

TQuickSort = record
public
CompareMethod : function (index1, index2 : Integer) : Integer of object;
SwapMethod : procedure (index1, index2 : Integer) of object;

procedure Sort(minIndex, maxIndex : Integer);
end;

EdwsVariantTypeCastError = class(EVariantTypeCastError)
public
constructor Create(const v : Variant; const desiredType : UnicodeString;
originalException : Exception);
end;

const
cMSecToDateTime : Double = 1/(24*3600*1000);

procedure UnifyAssignString(const fromStr : UnicodeString; var toStr : UnicodeString);
function UnifiedString(const fromStr : UnicodeString) : UnicodeString; inline;
procedure TidyStringsUnifier;
function StringUnifierHistogram : TIntegerDynArray;

function UnicodeCompareLen(p1, p2 : PWideChar; n : Integer) : Integer;
function UnicodeCompareText(const s1, s2 : UnicodeString) : Integer;
function UnicodeSameText(const s1, s2 : UnicodeString) : Boolean;
function AsciiCompareLen(p1, p2 : PAnsiChar; n : Integer) : Integer;

function StrNonNilLength(const aString : UnicodeString) : Integer; inline;

function StrIBeginsWith(const aStr, aBegin : UnicodeString) : Boolean;
function StrBeginsWith(const aStr, aBegin : UnicodeString) : Boolean;
function StrBeginsWithA(const aStr, aBegin : RawByteString) : Boolean;
function StrIEndsWith(const aStr, aEnd : UnicodeString) : Boolean;
function StrIEndsWithA(const aStr, aEnd : RawByteString) : Boolean;
function StrEndsWith(const aStr, aEnd : UnicodeString) : Boolean;
function StrContains(const aStr, aSubStr : UnicodeString) : Boolean; overload;
function StrContains(const aStr : UnicodeString; aChar : WideChar) : Boolean; overload;

function StrMatches(const aStr, aMask : UnicodeString) : Boolean;

function StrDeleteLeft(const aStr : UnicodeString; n : Integer) : UnicodeString;
function StrDeleteRight(const aStr : UnicodeString; n : Integer) : UnicodeString;

function StrAfterChar(const aStr : UnicodeString; aChar : WideChar) : UnicodeString;
function StrBeforeChar(const aStr : UnicodeString; aChar : WideChar) : UnicodeString;

function StrCountChar(const aStr : UnicodeString; c : WideChar) : Integer;

function Min(a, b : Integer) : Integer; inline;

function WhichPowerOfTwo(const v : Int64) : Integer;

function SimpleStringHash(const s : UnicodeString) : Cardinal; inline;

function RawByteStringToScriptString(const s : RawByteString) : UnicodeString; overload; inline;
procedure RawByteStringToScriptString(const s : RawByteString; var result : UnicodeString); inline; overload;
procedure BytesToScriptString(const p : PByte; n : Integer; var result : UnicodeString);
function ScriptStringToRawByteString(const s : UnicodeString) : RawByteString; overload; inline;
procedure ScriptStringToRawByteString(const s : UnicodeString; var result : RawByteString); overload;

type
TInt64StringBuffer = array [0..21] of WideChar;
TInt32StringBuffer = array [0..11] of WideChar;

function FastInt32ToBuffer(const val : Int32; var buf : TInt32StringBuffer) : Integer;
function FastInt64ToBuffer(const val : Int64; var buf : TInt64StringBuffer) : Integer;
procedure FastInt64ToStr(const val : Int64; var s : UnicodeString);
procedure FastInt64ToHex(val : Int64; digits : Integer; var s : UnicodeString);
function Int64ToHex(val : Int64; digits : Integer) : UnicodeString; inline;

function DivMod100(var dividend : Cardinal) : Cardinal;

procedure FastStringReplace(var str : UnicodeString; const sub, newSub : UnicodeString);

procedure VariantToString(const v : Variant; var s : UnicodeString);
procedure VariantToInt64(const v : Variant; var r : Int64);

type
EISO8601Exception = class (Exception);

function TryISO8601ToDateTime(const v : String; var aResult : TDateTime) : Boolean;
function ISO8601ToDateTime(const v : String) : TDateTime;
function DateTimeToISO8601(dt : TDateTime; extendedFormat : Boolean) : String;

procedure SuppressH2077ValueAssignedToVariableNeverUsed(const X); inline;

// ------------------------------------------------------------------
// ------------------------------------------------------------------
// ------------------------------------------------------------------
implementation
// ------------------------------------------------------------------
// ------------------------------------------------------------------
// ------------------------------------------------------------------

// SuppressH2077ValueAssignedToVariableNeverUsed
//
procedure SuppressH2077ValueAssignedToVariableNeverUsed(const X); inline;
begin
end;

// SimpleStringHash
//
function SimpleStringHash(const s : UnicodeString) : Cardinal; inline;
var
i : Integer;
begin
// modified FNV-1a using length as seed
Result:=Length(s);
for i:=1 to Result do
Result:=(Result xor Ord(s[i]))*16777619;
end;

// ScriptStringToRawByteString
//
function ScriptStringToRawByteString(const s : UnicodeString) : RawByteString;
begin
ScriptStringToRawByteString(s, Result);
end;

// ScriptStringToRawByteString
//
procedure ScriptStringToRawByteString(const s : UnicodeString; var result : RawByteString); overload;
var
i, n : Integer;
pSrc : PWideChar;
pDest : PByteArray;
begin
n:=Length(s);
SetLength(Result, n);
if n=0 then Exit;
pSrc:=PWideChar(Pointer(s));
pDest:=PByteArray(NativeUInt(Result));
for i:=0 to n-1 do
pDest[i]:=PByte(@pSrc[i])^;
end;

// DivMod100
//
function DivMod100(var dividend : Cardinal) : Cardinal;
const
c100 : Cardinal = 100;
{$ifndef WIN32_ASM}
var
divided : Cardinal;
begin
divided:=dividend div 100;
Result:=dividend-divided*100;
dividend:=divided;
{$else}
asm
mov ecx, eax

mov eax, [eax]
xor edx, edx
div c100

mov [ecx], eax
mov eax, edx
{$endif}
end;

type
TTwoChars = packed array [0..1] of WideChar;
PTwoChars = ^TTwoChars;
const
cTwoDigits : packed array [0..99] of TTwoChars = (
('0','0'), ('0','1'), ('0','2'), ('0','3'), ('0','4'), ('0','5'), ('0','6'), ('0','7'), ('0','8'), ('0','9'),
('1','0'), ('1','1'), ('1','2'), ('1','3'), ('1','4'), ('1','5'), ('1','6'), ('1','7'), ('1','8'), ('1','9'),
('2','0'), ('2','1'), ('2','2'), ('2','3'), ('2','4'), ('2','5'), ('2','6'), ('2','7'), ('2','8'), ('2','9'),
('3','0'), ('3','1'), ('3','2'), ('3','3'), ('3','4'), ('3','5'), ('3','6'), ('3','7'), ('3','8'), ('3','9'),
('4','0'), ('4','1'), ('4','2'), ('4','3'), ('4','4'), ('4','5'), ('4','6'), ('4','7'), ('4','8'), ('4','9'),
('5','0'), ('5','1'), ('5','2'), ('5','3'), ('5','4'), ('5','5'), ('5','6'), ('5','7'), ('5','8'), ('5','9'),
('6','0'), ('6','1'), ('6','2'), ('6','3'), ('6','4'), ('6','5'), ('6','6'), ('6','7'), ('6','8'), ('6','9'),
('7','0'), ('7','1'), ('7','2'), ('7','3'), ('7','4'), ('7','5'), ('7','6'), ('7','7'), ('7','8'), ('7','9'),
('8','0'), ('8','1'), ('8','2'), ('8','3'), ('8','4'), ('8','5'), ('8','6'), ('8','7'), ('8','8'), ('8','9'),
('9','0'), ('9','1'), ('9','2'), ('9','3'), ('9','4'), ('9','5'), ('9','6'), ('9','7'), ('9','8'), ('9','9')
);
function EightDigits(i : Cardinal; p : PWideChar) : Integer;
var
r : Integer;
begin
Result:=0;
Dec(p);
repeat
if i<100 then begin
r:=i;
i:=0;
end else begin
r:=DivMod100(i);
end;
if r>=10 then begin
PTwoChars(p)^:=cTwoDigits[r];
Dec(p, 2);
Inc(Result, 2);
end else begin
p[1]:=WideChar(Ord('0')+r);
if i>0 then begin
p[0]:='0';
Dec(p, 2);
Inc(Result, 2);
end else begin
Inc(Result);
Break;
end;
end;
until i=0;
end;

// FastInt32ToBuffer
//
{$IFOPT R+}
{$DEFINE RANGEON}
{$R-}
{$ELSE}
{$UNDEF RANGEON}
{$ENDIF}
function FastInt32ToBuffer(const val : Int32; var buf : TInt32StringBuffer) : Integer;
var
n, nd : Integer;
neg : Boolean;
i, next : UInt32;
begin
if val<0 then begin
neg:=True;
//range checking is off here because the code causes range check errors
//code here...
i:=-val;
end else begin
if val=0 then begin
Result:=High(buf);
buf[Result]:='0';
Exit;
end else i:=val;
neg:=False;
end;
nd:=High(buf);
n:=nd;
while True do begin
if i>100000000 then begin
next:=i div 100000000;
n:=n-EightDigits(i-next*100000000, @buf[n]);
i:=next;
end else begin
n:=n-EightDigits(i, @buf[n]);
Break;
end;
Dec(nd, 8);
while n>nd do begin
buf[n]:='0';
Dec(n);
end;
end;
if neg then
buf[n]:='-'
else Inc(n);
Result:=n;
end;
{$IFDEF RANGEON}
{$R+}
{$ENDIF}

// FastInt64ToBuffer
//
{$IFOPT R+}
{$DEFINE RANGEON}
{$R-}
{$ELSE}
{$UNDEF RANGEON}
{$ENDIF}
function FastInt64ToBuffer(const val : Int64; var buf : TInt64StringBuffer) : Integer;
var
n, nd : Integer;
neg : Boolean;
i, next : UInt64;
begin
if val<0 then begin
neg:=True;
//range checking is off here because the code causes range check errors
//code here...
i:=-val;
end else begin
if val=0 then begin
Result:=High(buf);
buf[Result]:='0';
Exit;
end else i:=val;
neg:=False;
end;
nd:=High(buf);
n:=nd;
while True do begin
if i>100000000 then begin
next:=i div 100000000;
n:=n-EightDigits(i-next*100000000, @buf[n]);
i:=next;
end else begin
n:=n-EightDigits(i, @buf[n]);
Break;
end;
Dec(nd, 8);
while n>nd do begin
buf[n]:='0';
Dec(n);
end;
end;
if neg then
buf[n]:='-'
else Inc(n);
Result:=n;
end;
{$IFDEF RANGEON}
{$R+}
{$ENDIF}

// InitializeSmallIntegers
//
var
vSmallIntegers : array [0..39] of String;
procedure InitializeSmallIntegers;
var
i : Integer;
begin
// we can't use a constant array here, as obtaining a string from a constant
// array implies a memory allocations, which would defeat the whole purpose
for i := 0 to High(vSmallIntegers) do
vSmallIntegers[i] := IntToStr(i);
end;

// FastInt64ToStr
//
procedure FastInt64ToStr(const val : Int64; var s : UnicodeString);
var
buf : TInt64StringBuffer;
n : Integer;
begin
if (Int64Rec(val).Hi=0) and (Int64Rec(val).Lo<=High(vSmallIntegers)) then
s:=vSmallIntegers[Int64Rec(val).Lo]
else begin
n:=FastInt64ToBuffer(val, buf);
SetString(s, PWideChar(@buf[n]), (High(buf)+1)-n);
end;
end;

// FastInt64ToHex
//
procedure FastInt64ToHex(val : Int64; digits : Integer; var s : UnicodeString);
const
cIntToHex : array [0..15] of WideChar = (
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
);
var
buf : array [0..15] of WideChar;
p : PWideChar;
d, i : Integer;
begin
if Cardinal(digits)>16 then begin
if digits<=0 then
digits:=1
else digits:=16;
end;
p:=@buf[15];
if PIntegerArray(@val)[1]=0 then begin
i:=PIntegerArray(@val)[0];
repeat
d:=i and 15;
i:=i shr 4;
p^:=cIntToHex[d];
Dec(p);
Dec(digits);
until i=0;
end else begin
repeat
d:=val and 15;
val:=val shr 4;
p^:=cIntToHex[d];
Dec(p);
Dec(digits);
until val=0;
end;
for i:=1 to digits do begin
p^:='0';
Dec(p);
end;
SetString(s, PWideChar(@p[1]), (NativeUInt(@buf[15])-NativeUInt(p)) div SizeOf(WideChar));
end;

// Int64ToHex
//
function Int64ToHex(val : Int64; digits : Integer) : UnicodeString;
begin
FastInt64ToHex(val, digits, Result);
end;

// FastStringReplace
//
procedure FastStringReplace(var str : UnicodeString; const sub, newSub : UnicodeString);

procedure FallBack;
begin
str:=SysUtils.StringReplace(str, sub, newSub, [rfReplaceAll]);
end;

procedure ReplaceChars(pStr : PWideChar; oldChar, newChar : WideChar; n : Integer);
begin
pStr^:=newChar;
for n:=1 to n do begin
if pStr[n]=oldChar then
pStr[n]:=newChar;
end;
end;

var
p, dp, np : Integer;
subLen, newSubLen : Integer;
pStr, pNewSub : PWideChar;
begin
if (str='') or (sub='') then Exit;

p:=Pos(sub, str);
if p<=0 then Exit;

subLen:=Length(sub);
newSubLen:=Length(newSub);

pNewSub:=PWideChar(newSub);

if subLen=newSubLen then begin

// same length, replace in-place
UniqueString(str);
pStr:=PWideChar(Pointer(str));

if subLen=1 then begin

// special case of character replacement
ReplaceChars(@pStr[p-1], sub[1], pNewSub^, Length(str)-p);

end else begin

repeat
System.Move(pNewSub^, pStr[p-1], subLen*SizeOf(WideChar));
p:=PosEx(sub, str, p+subLen);
until p<=0;

end;

end else if newSubLen<subLen then begin

// shorter replacement, replace & pack in-place
UniqueString(str);
pStr:=PWideChar(Pointer(str));

dp:=p-1;
while True do begin
if newSubLen>0 then begin
System.Move(pNewSub^, pStr[dp], newSubLen*SizeOf(WideChar));
dp:=dp+newSubLen;
end;
p:=p+subLen;
np:=PosEx(sub, str, p);
if np>0 then begin
if np>p then begin
System.Move(pStr[p-1], pStr[dp], (np-p)*SizeOf(WideChar));
dp:=dp+np-p;
end;
p:=np;
end else begin
np:=Length(str)+1-p;
if np>0 then
System.Move(pStr[p-1], pStr[dp], np*SizeOf(WideChar));
SetLength(str, dp+np);
Break;
end;
end;

end else begin

// growth required (not optimized yet, todo)
FallBack;

end;
end;

// VariantToString
//
procedure VariantToString(const v : Variant; var s : UnicodeString);

procedure DispatchAsString(const disp : Pointer; var Result : UnicodeString);
begin
Result:=UnicodeFormat('IDispatch (%p)', [disp]);
end;

procedure UnknownAsString(const unknown : IUnknown; var Result : UnicodeString);
var
intf : IGetSelf;
begin
if unknown=nil then
Result:='nil'
else if unknown.QueryInterface(IGetSelf, intf)=0 then
Result:=intf.ToString
else Result:='[IUnknown]';
end;

procedure FloatAsString(var v : Double; var Result : UnicodeString);
begin
Result:=FloatToStr(v);
end;

var
varData : PVarData;
begin
varData:=PVarData(@v);
case varData^.VType of
{$ifdef FPC}
varString :
s:=UnicodeString(varData^.VString);
{$else}
varString :
s:=RawByteStringToScriptString(RawByteString(varData^.VString));
varUString :
s:=UnicodeString(varData^.VUString);
{$endif}
varInt64 :
FastInt64ToStr(varData^.VInt64, s);
varDouble :
FloatAsString(varData^.VDouble, s);
varBoolean :
if varData^.VBoolean then
s:='True'
else s:='False';
varNull :
s:='Null';
varDispatch :
DispatchAsString(varData^.VDispatch, s);
varUnknown :
UnknownAsString(IUnknown(varData^.VUnknown), s);
else
s:=v;
end;
end;

// VariantToInt64
//
procedure VariantToInt64(const v : Variant; var r : Int64);

procedure DefaultCast;
begin
try
r:=v;
except
// workaround for RTL bug that will sometimes report a failed cast to Int64
// as being a failed cast to Boolean
on E : EVariantError do begin
raise EdwsVariantTypeCastError.Create(v, 'Integer', E);
end else raise;
end;
end;

begin
case TVarData(v).VType of
varInt64 :
r:=TVarData(v).VInt64;
varBoolean :
r:=Ord(TVarData(v).VBoolean);
varUnknown :
if TVarData(v).VUnknown=nil then
r:=0
else DefaultCast;
else
DefaultCast;
end;
end;

// DateTimeToISO8601
//
function DateTimeToISO8601(dt : TDateTime; extendedFormat : Boolean) : String;
var
buf : array [0..31] of Char;
p : PChar;

procedure WriteChar(c : Char);
begin
p^:=c;
Inc(p);
end;

procedure Write2Digits(v : Integer);
begin
PTwoChars(p)^:=cTwoDigits[v];
Inc(p, 2);
end;

var
y, m, d, h, n, s, z : Word;
begin
p:=@buf;
DecodeDate(dt, y, m, d);
Write2Digits((y div 100) mod 100);
Write2Digits(y mod 100);
if extendedFormat then
WriteChar('-');
Write2Digits(m);
if extendedFormat then
WriteChar('-');
Write2Digits(d);
DecodeTime(dt, h, n, s, z);

WriteChar('T');
Write2Digits(h);
if extendedFormat then
WriteChar(':');
Write2Digits(n);
if s<>0 then begin
if extendedFormat then
WriteChar(':');
Write2Digits(s);
end;
WriteChar('Z');

p^:=#0;
Result:=buf;
end;

// ISO8601ToDateTime
//
function ISO8601ToDateTime(const v : String) : TDateTime;
var
p : PChar;

function ReadDigit : Integer;
var
c : Char;
begin
c := p^;
case c of
'0'..'9' : Result:=Ord(c)-Ord('0');
else
raise EISO8601Exception.CreateFmt('Unexpected character (%d) instead of digit', [Ord(c)]);
end;
Inc(p);
end;

function Read2Digits : Integer; inline;
begin
Result:=ReadDigit*10;
Result:=Result+ReadDigit;
end;

function Read4Digits : Integer; inline;
begin
Result:=Read2Digits*100;
Result:=Result+Read2Digits;
end;

var
y, m, d, h, n, s : Integer;
separator : Boolean;
begin
if v='' then begin
Result:=0;
Exit;
end;
p:=Pointer(v);

// parsing currently limited to basic Z variations with limited validation

y:=Read4Digits;
separator:=(p^='-');
if separator then
Inc(p);
m:=Read2Digits;
if separator then begin
if p^<>'-' then
raise EISO8601Exception.Create('"-" expected after month');
Inc(p);
end;
d:=Read2Digits;
try
Result:=EncodeDate(y, m, d);
except
on E: Exception do
raise EISO8601Exception.Create(E.Message);
end;

if p^=#0 then Exit;
case p^ of
'T', ' ' : Inc(p);
else
raise EISO8601Exception.Create('"T" expected after date');
end;

h:=Read2Digits;
separator:=(p^=':');
if separator then
Inc(p);
n:=Read2Digits;
case p^ of
':', '0'..'9' : begin
if (p^=':')<>separator then begin
if separator then
raise EISO8601Exception.Create('":" expected after minutes')
else raise EISO8601Exception.Create('Unexpected ":" after minutes');
end;
Inc(p);
s:=Read2Digits;
end;
else
s:=0;
end;

Result:=Result+EncodeTime(h, n, s, 0);

case p^ of
#0 : exit;
'Z' : Inc(p);
else
raise EISO8601Exception.Create('Unsupported ISO8601 time zone');
end;

if p^<>#0 then
raise EISO8601Exception.Create('Unsupported or invalid ISO8601 format');
end;

// TryISO8601ToDateTime
//
function TryISO8601ToDateTime(const v : String; var aResult : TDateTime) : Boolean;
begin
try
aResult:=ISO8601ToDateTime(v);
Result:=True;
except
on E : EISO8601Exception do
Result:=False;
else raise
end;
end;

// FastCompareFloat
//
function FastCompareFloat(d1, d2 : PDouble) : Integer;
{$ifdef WIN32_ASM}
asm
fld qword ptr [edx]
fld qword ptr [eax]
xor eax, eax
fcomip st, st(1)
setnbe cl
setb al
and ecx, 1
neg eax
or eax, ecx
fstp st(0)
{$else}
begin
if d1^<d2^ then
Result:=-1
else Result:=Ord(d1^>d2^);
{$endif}
end;

// RawByteStringToScriptString
//
function RawByteStringToScriptString(const s : RawByteString) : UnicodeString;
begin
RawByteStringToScriptString(s, Result);
end;

// RawByteStringToScriptString
//
procedure RawByteStringToScriptString(const s : RawByteString; var result : UnicodeString); overload;
begin
if s='' then begin
result:='';
exit;
end;
BytesToScriptString(Pointer(s), Length(s), result)
end;

// BytesToScriptString
//
procedure BytesToScriptString(const p : PByte; n : Integer; var result : UnicodeString); overload;
var
i : Integer;
pSrc : PByteArray;
pDest : PWordArray;
begin
SetLength(result, n);
pSrc:=PByteArray(p);
pDest:=PWordArray(Pointer(result));
for i:=0 to n-1 do
pDest[i]:=Word(PByte(@pSrc[i])^);
end;

// ------------------
// ------------------ TStringUnifier ------------------
// ------------------

// Create
//
constructor TStringUnifier.Create;
begin
inherited;
FLock:=TFixedCriticalSection.Create;
end;

// Destroy
//
destructor TStringUnifier.Destroy;
begin
inherited;
FLock.Free;
end;

// UnifyAssign
//
procedure TStringUnifier.UnifyAssign(const aString : UnicodeString; h : Cardinal; var unifiedString : UnicodeString);
var
i : Integer;
bucket : PStringUnifierBucket;
begin
if FGrowth=0 then Grow;

i:=(h and (FCapacity-1));

repeat
bucket:=@FBuckets[i];
if (bucket^.Hash=h) and (bucket^.Str=aString) then begin
unifiedString:=bucket^.Str;
Exit;
end else if bucket^.Hash=0 then begin
bucket^.Hash:=h;
bucket^.Str:=aString;
unifiedString:=aString;
Inc(FCount);
Dec(FGrowth);
Exit;
end;
i:=(i+1) and (FCapacity-1);
until False;
end;

// Lock
//
procedure TStringUnifier.Lock;
begin
FLock.Enter;
end;

// UnLock
//
procedure TStringUnifier.UnLock;
begin
FLock.Leave;
end;

// Clear
//
procedure TStringUnifier.Clear;
begin
SetLength(FBuckets, 0);
FCount:=0;
FGrowth:=0;
FCapacity:=0;
end;

// Grow
//
procedure TStringUnifier.Grow;
var
i, j, n : Integer;
oldBuckets : TStringUnifierBuckets;
begin
if FCapacity=0 then
FCapacity:=32
else FCapacity:=FCapacity*2;
FGrowth:=(FCapacity*3) div 4-FCount;

oldBuckets:=FBuckets;
FBuckets:=nil;
SetLength(FBuckets, FCapacity);

n:=FCapacity-1;
for i:=0 to High(oldBuckets) do begin
if oldBuckets[i].Hash=0 then continue;
j:=(oldBuckets[i].Hash and (FCapacity-1));
while FBuckets[j].Hash<>0 do
j:=(j+1) and n;
FBuckets[j].Hash:=oldBuckets[i].Hash;
FBuckets[j].Str:=oldBuckets[i].Str;
end;
end;

// ------------------
// ------------------ UnicodeString Unifier ------------------
// ------------------

type
{$IFNDEF FPC}
{$IF CompilerVersion > 22}
TStringListList = TStringItemList;
{$ELSE}
TStringListList = PStringItemList;
{$IFEND}
{$ELSE}
TStringListList = PStringItemList;
{$ENDIF}

{$ifndef FPC}
TStringListCracker = class (TStrings)
private
FList : TStringListList;
end;
{$endif}

var
vUnifiedStrings : array [0..63] of TStringUnifier;

// CompareStrings
//
{$ifdef FPC}
function TFastCompareStringList.DoCompareText(const S1, S2: String): Integer;
begin
Result:=CompareStr(S1, S2);
end;
{$else}
function TFastCompareStringList.CompareStrings(const S1, S2: UnicodeString): Integer;
begin
Result:=CompareStr(S1, S2);
end;

// IndexOfName
//
function TFastCompareStringList.IndexOfName(const name : UnicodeString): Integer;
var
n, nc : Integer;
nvs : WideChar;
list : TStringListList;
begin
nvs:=NameValueSeparator;
n:=Length(name);
list:=TStringListCracker(Self).FList;
for Result:=0 to Count-1 do begin
nc:=Length(list[Result].FString);
if (nc>n) and (list[Result].FString[n+1]=nvs)
and CompareMem(PWideChar(Pointer(name)),
PWideChar(Pointer(list[Result].FString)), n) then Exit;
end;
Result:=-1;
end;
{$endif}

// InitializeStringsUnifier
//
procedure InitializeStringsUnifier;
var
i : Integer;
begin
for i:=Low(vUnifiedStrings) to High(vUnifiedStrings) do
vUnifiedStrings[i]:=TStringUnifier.Create;
end;

// FinalizeStringsUnifier
//
procedure FinalizeStringsUnifier;
var
i : Integer;
begin
for i:=Low(vUnifiedStrings) to High(vUnifiedStrings) do begin
vUnifiedStrings[i].Free;
vUnifiedStrings[i]:=nil;
end;
end;

// UnifyAssignString
//
procedure UnifyAssignString(const fromStr : UnicodeString; var toStr : UnicodeString);
var
i : Integer;
su : TStringUnifier;
h : Cardinal;
begin
if fromStr='' then
toStr:=''
else begin
h:=SimpleStringHash(fromStr);
i:=h and High(vUnifiedStrings);
su:=vUnifiedStrings[i];
su.Lock;
su.UnifyAssign(fromStr, h shr 6, toStr);
su.UnLock;
end;
end;

// UnifiedString
//
function UnifiedString(const fromStr : UnicodeString) : UnicodeString;
begin
UnifyAssignString(fromStr, Result);
end;

// TidyStringsUnifier
//
procedure TidyStringsUnifier;
var
i : Integer;
su : TStringUnifier;
begin
for i:=Low(vUnifiedStrings) to High(vUnifiedStrings) do begin
su:=vUnifiedStrings[i];
su.Lock;
su.Clear;
su.UnLock;
end;
end;

// StringUnifierHistogram
//
function StringUnifierHistogram : TIntegerDynArray;
var
i : Integer;
begin
SetLength(Result, Length(vUnifiedStrings));
for i:=Low(vUnifiedStrings) to High(vUnifiedStrings) do
Result[i-Low(vUnifiedStrings)]:=vUnifiedStrings[i].Count;
end;

// UnicodeCompareLen
//
function UnicodeCompareLen(p1, p2 : PWideChar; n : Integer) : Integer;
var
c1, c2 : Integer;
begin
for n:=n downto 1 do begin
c1:=Ord(p1^);
c2:=Ord(p2^);
if (c1<>c2) then begin
if (c1<=127) and (c2<=127) then begin
if c1 in [Ord('a')..Ord('z')] then
c1:=c1+(Ord('A')-Ord('a'));
if c2 in [Ord('a')..Ord('z')] then
c2:=c2+(Ord('A')-Ord('a'));
if c1<>c2 then begin
Result:=c1-c2;
Exit;
end;
end else begin
Result:=UnicodeComparePChars(p1, p2, n);
Exit;
end;
end;
Inc(p1);
Inc(p2);
end;
Result:=0;
end;

// UnicodeCompareText
//
{$R-}
function UnicodeCompareText(const s1, s2 : UnicodeString) : Integer;
var
n1, n2 : Integer;
ps1, ps2 : PWideChar;
begin
ps1:=PWideChar(NativeInt(s1));
ps2:=PWideChar(NativeInt(s2));
if ps1<>nil then begin
if ps2<>nil then begin
n1:=PInteger(NativeUInt(ps1)-4)^;
n2:=PInteger(NativeUInt(ps2)-4)^;
if n1<n2 then begin
Result:=UnicodeCompareLen(ps1, ps2, n1);
if Result=0 then
Result:=-1;
end else begin
Result:=UnicodeCompareLen(ps1, ps2, n2);
if (Result=0) and (n1>n2) then
Result:=1;
end;
end else Result:=1;
end else if ps2<>nil then
Result:=-1
else Result:=0;
end;

// UnicodeSameText
//
function UnicodeSameText(const s1, s2 : UnicodeString) : Boolean;
begin
Result:=(Length(s1)=Length(s2)) and (UnicodeCompareText(s1, s2)=0)
end;

// AsciiCompareLen
//
function AsciiCompareLen(p1, p2 : PAnsiChar; n : Integer) : Integer;
var
c1, c2 : Integer;
begin
for n:=n downto 1 do begin
c1:=Ord(p1^);
c2:=Ord(p2^);
if (c1<>c2) then begin
if c1 in [Ord('a')..Ord('z')] then
c1:=c1+(Ord('A')-Ord('a'));
if c2 in [Ord('a')..Ord('z')] then
c2:=c2+(Ord('A')-Ord('a'));
if c1<>c2 then begin
Result:=c1-c2;
Exit;
end;
end;
Inc(p1);
Inc(p2);
end;
Result:=0;
end;

// StrNonNilLength
//
function StrNonNilLength(const aString : UnicodeString) : Integer;
begin
Result:=PInteger(NativeUInt(Pointer(aString))-4)^;
end;

// StrIBeginsWith
//
function StrIBeginsWith(const aStr, aBegin : UnicodeString) : Boolean;
var
n1, n2 : Integer;
begin
n1:=Length(aStr);
n2:=Length(aBegin);
if (n2>n1) or (n2=0) then
Result:=False
else Result:=(UnicodeCompareLen(PWideChar(aStr), PWideChar(aBegin), n2)=0);
end;

// StrBeginsWith
//
function StrBeginsWith(const aStr, aBegin : UnicodeString) : Boolean;
var
n1, n2 : Integer;
begin
n1:=Length(aStr);
n2:=Length(aBegin);
if (n2>n1) or (n2=0) then
Result:=False
else Result:=CompareMem(Pointer(aStr), Pointer(aBegin), n2*SizeOf(WideChar));
end;

// StrBeginsWithA
//
function StrBeginsWithA(const aStr, aBegin : RawByteString) : Boolean;
var
n1, n2 : Integer;
begin
n1:=Length(aStr);
n2:=Length(aBegin);
if (n2>n1) or (n2=0) then
Result:=False
else Result:=CompareMem(Pointer(aStr), Pointer(aBegin), n2);
end;

// StrIEndsWith
//
function StrIEndsWith(const aStr, aEnd : UnicodeString) : Boolean;
var
n1, n2 : Integer;
begin
n1:=Length(aStr);
n2:=Length(aEnd);
if (n2>n1) or (n2=0) then
Result:=False
else Result:=(UnicodeCompareLen(@aStr[n1-n2+1], Pointer(aEnd), n2)=0);
end;

// StrIEndsWithA
//
function StrIEndsWithA(const aStr, aEnd : RawByteString) : Boolean;
var
n1, n2 : Integer;
begin
n1:=Length(aStr);
n2:=Length(aEnd);
if (n2>n1) or (n2=0) then
Result:=False
else Result:=(AsciiCompareLen(@aStr[n1-n2+1], Pointer(aEnd), n2)=0);
end;

// StrEndsWith
//
function StrEndsWith(const aStr, aEnd : UnicodeString) : Boolean;
var
n1, n2 : Integer;
begin
n1:=Length(aStr);
n2:=Length(aEnd);
if (n2>n1) or (n2=0) then
Result:=False
else Result:=CompareMem(@aStr[n1-n2+1], Pointer(aEnd), n2*SizeOf(WideChar));
end;

// StrContains (sub string)
//
function StrContains(const aStr, aSubStr : UnicodeString) : Boolean;
begin
if aSubStr='' then
Result:=True
else if StrNonNilLength(aSubStr)=1 then
Result:=StrContains(aStr, aSubStr[1])
else Result:=(Pos(aSubStr, aStr)>0);
end;

// StrMatches
//
function StrMatches(const aStr, aMask : UnicodeString) : Boolean;
var
mask : TMask;
begin
mask:=TMask.Create(aMask);
try
Result:=mask.Matches(aStr);
finally
mask.Free;
end;
end;

// StrContains (sub char)
//
function StrContains(const aStr : UnicodeString; aChar : WideChar) : Boolean;
var
i : Integer;
begin
for i:=0 to Length(aStr)-1 do
if aStr[i+1]=aChar then Exit(True);
Result:=False;
end;

// StrDeleteLeft
//
function StrDeleteLeft(const aStr : UnicodeString; n : Integer) : UnicodeString;
begin
Result:=Copy(aStr, n+1);
end;

// StrDeleteRight
//
function StrDeleteRight(const aStr : UnicodeString; n : Integer) : UnicodeString;
begin
Result:=Copy(aStr, 1, Length(aStr)-n);
end;

// StrAfterChar
//
function StrAfterChar(const aStr : UnicodeString; aChar : WideChar) : UnicodeString;
var
p : Integer;
begin
p:=Pos(aChar, aStr);
if p>0 then
Result:=Copy(aStr, p+1)
else Result:='';
end;

// StrBeforeChar
//
function StrBeforeChar(const aStr : UnicodeString; aChar : WideChar) : UnicodeString;
var
p : Integer;
begin
p:=Pos(aChar, aStr);
if p>0 then
Result:=Copy(aStr, 1, p-1)
else Result:=aStr;
end;

// StrCountChar
//
function StrCountChar(const aStr : UnicodeString; c : WideChar) : Integer;
var
i : Integer;
begin
Result:=0;
for i:=1 to Length(aStr) do
if aStr[i]=c then
Inc(Result);
end;

// Min
//
function Min(a, b : Integer) : Integer;
begin
if a<b then
Result:=a
else Result:=b;
end;

// WhichPowerOfTwo
//
function WhichPowerOfTwo(const v : Int64) : Integer;
var
n : Int64;
begin
if (v>0) and ((v and (v-1))=0) then begin
for Result:=0 to 63 do begin
n:=Int64(1) shl Result;
if n>v then Break;
if n=v then Exit;
end;
end;
Result:=-1;
end;

// ------------------
// ------------------ TFastCompareTextList ------------------
// ------------------

// CompareStrings
//
{$ifdef FPC}
function TFastCompareTextList.DoCompareText(const S1, S2: String): Integer;
begin
Result:=UnicodeCompareText(s1, s2);
end;
{$else}
function TFastCompareTextList.CompareStrings(const S1, S2: UnicodeString): Integer;
begin
Result:=UnicodeCompareText(s1, s2);
end;

// FindName
//
function TFastCompareTextList.FindName(const name : UnicodeString; var index : Integer) : Boolean;
var
lo, hi, mid, cmp, n, nc : Integer;
initial : UnicodeString;
list : TStringListList;
begin
Result:=False;
list:=TStringListCracker(Self).FList;
initial:=Name+NameValueSeparator;
n:=Length(initial);
lo:=0;
hi:=Count-1;
while lo<=hi do begin
mid:=(lo+hi) shr 1;
nc:=Length(list[mid].FString);
if nc>=n then begin
cmp:=UnicodeCompareLen(PWideChar(Pointer(list[mid].FString)), PWideChar(Pointer(initial)), n);
end else begin
cmp:=UnicodeCompareLen(PWideChar(Pointer(list[mid].FString)), PWideChar(Pointer(initial)), nc);
if cmp=0 then
cmp:=-1;
end;
if cmp<0 then
lo:=mid+1
else begin
hi:=mid-1;
if cmp=0 then begin
Result:=True;
if Duplicates<>dupAccept then
lo:=mid;
end;
end;
end;
index:=lo;
end;

// IndexOfName
//
function TFastCompareTextList.IndexOfName(const name : UnicodeString): Integer;
var
n, nc : Integer;
nvs : WideChar;
list : TStringListList;
begin
if not Sorted then begin
nvs:=NameValueSeparator;
n:=Length(name);
list:=TStringListCracker(Self).FList;
for Result:=0 to Count-1 do begin
nc:=Length(list[Result].FString);
if (nc>n) and (list[Result].FString[n+1]=nvs)
and (UnicodeCompareLen(PWideChar(Pointer(name)),
PWideChar(Pointer(list[Result].FString)), n)=0) then Exit;
end;
Result:=-1;
end else begin
if not FindName(name, Result) then
Result:=-1;
end;
end;
{$endif}

// ------------------
// ------------------ TVarRecArrayContainer ------------------
// ------------------

// Create
//
constructor TVarRecArrayContainer.Create;
begin
end;

// Create
//
constructor TVarRecArrayContainer.Create(const variantArray : array of Variant);
var
i : Integer;
begin
Create;
for i:=Low(variantArray) to High(variantArray) do
Add(variantArray[i]);
Initialize;
end;

// AddVarRec
//
function TVarRecArrayContainer.AddVarRec : PVarRec;
var
n : Integer;
begin
n:=Length(VarRecArray);
SetLength(VarRecArray, n+1);
Result:=@VarRecArray[n];
end;

// Add
//
procedure TVarRecArrayContainer.Add(const v : Variant);
begin
if VarType(v)=varBoolean then
AddBoolean(v)
else if VarIsOrdinal(v) then
AddInteger(v)
else if VarIsNumeric(v) then
AddFloat(v)
else if VarIsStr(v) then
AddString(v)
else begin
// not really supported yet, use a nil placeholder
with AddVarRec^ do begin
VType:=vtPointer;
VPointer:=nil;
end;
end;
end;

// AddBoolean
//
procedure TVarRecArrayContainer.AddBoolean(const b : Boolean);
begin
with AddVarRec^ do begin
VType:=vtBoolean;
VBoolean:=b;
end;
end;

// AddInteger
//
procedure TVarRecArrayContainer.AddInteger(const i : Int64);
var
n : Integer;
begin
n:=Length(FIntegers);
SetLength(FIntegers, n+1);
FIntegers[n]:=i;
with AddVarRec^ do begin
VType:=vtInt64;
VInteger:=n;
end;
end;

// AddFloat
//
procedure TVarRecArrayContainer.AddFloat(const f : Double);
var
n : Integer;
begin
n:=Length(FFloats);
SetLength(FFloats, n+1);
FFloats[n]:=f;
with AddVarRec^ do begin
VType:=vtExtended;
VInteger:=n;
end;
end;

// AddString
//
procedure TVarRecArrayContainer.AddString(const s : UnicodeString);
var
n : Integer;
begin
n:=Length(FStrings);
SetLength(FStrings, n+1);
FStrings[n]:=s;
with AddVarRec^ do begin
VType:=vtUnicodeString;
VInteger:=n;
end;
end;

// Initialize
//
procedure TVarRecArrayContainer.Initialize;
var
i : Integer;
rec : PVarRec;
begin
for i:=0 to High(VarRecArray) do begin
rec:=@VarRecArray[i];
case rec.VType of
vtInt64 : rec.VInt64:=@FIntegers[rec.VInteger];
vtExtended : rec.VExtended:=@FFloats[rec.VInteger];
vtUnicodeString : rec.VString:=Pointer(FStrings[rec.VInteger]);
end;
end;
end;

// ------------------
// ------------------ TVarRecArrayContainer ------------------
// ------------------

// Clean
//
procedure TTightList.Clean;
var
i : Integer;
begin
case Count of
0 : Exit;
1 : TRefCountedObject(FList).Free;
else
for i:=Count-1 downto 0 do
FList[i].Free;
end;
Clear;
end;

// Clear
//
procedure TTightList.Clear;
begin
case Count of
0 : Exit;
1 : ;
else
FreeMem(FList);
end;
FList:=nil;
FCount:=0;
end;

// Free
//
procedure TTightList.Free;
begin
Clear;
end;

// GetList
//
function TTightList.GetList : PObjectTightList;
begin
if Count=1 then
Result:=@FList
else Result:=FList;
end;

// Add
//
function TTightList.Add(item : TRefCountedObject) : Integer;
var
buf : Pointer;
begin
case Count of
0 : begin
FList:=PObjectTightList(item);
FCount:=1;
end;
1 : begin
buf:=FList;
FList:=AllocMem(2*SizeOf(Pointer));
FList[0]:=buf;
FList[1]:=item;
FCount:=2;
end;
else
Inc(FCount);
ReallocMem(FList, Count*SizeOf(Pointer));
FList[Count-1]:=item;
end;
Result:=FCount-1;
end;

// Assign
//
procedure TTightList.Assign(const aList : TTightList);
begin
Clear;
FCount:=aList.FCount;
case Count of
0 : Exit;
1 : FList:=aList.FList;
else
ReallocMem(FList, Count*SizeOf(Pointer));
System.Move(aList.FList^, FList^, Count*SizeOf(Pointer));
end;
end;

// IndexOf
//
function TTightList.IndexOf(item : TRefCountedObject) : Integer;
begin
case Count of
0 : Result:=-1;
1 : begin
if FList=PObjectTightList(item) then
Result:=0
else Result:=-1;
end;
else
Result:=0;
while Result<FCount do begin
if FList[Result]=item then Exit;
Inc(Result);
end;
Result:=-1;
end;
end;

// Remove
//
function TTightList.Remove(item : TRefCountedObject) : Integer;
begin
Result:=IndexOf(item);
if Result>=0 then
Delete(Result);
end;

// Delete
//
procedure TTightList.Delete(index : Integer);
var
i : Integer;
buf : Pointer;
begin
if Cardinal(index)>=Cardinal(Count) then
RaiseIndexOutOfBounds
else begin
case Count of
1 : begin
FList:=nil;
FCount:=0;
end;
2 : begin
buf:=FList;
if index=0 then
FList:=PObjectTightList(FList[1])
else FList:=PObjectTightList(FList[0]);
FreeMem(buf);
FCount:=1;
end;
else
for i:=index+1 to Count-1 do
FList[i-1]:=FList[i];
Dec(FCount);
end;
end;
end;

// Insert
//
procedure TTightList.Insert(index : Integer; item : TRefCountedObject);
var
i : Integer;
locList : PObjectTightList;
begin
if Cardinal(index)>Cardinal(FCount) then
RaiseIndexOutOfBounds
else case Count of
0 : begin
FList:=PObjectTightList(item);
FCount:=1;
end;
1 : begin
if index=1 then
Add(item)
else begin
Add(TRefCountedObject(FList));
FList[0]:=item;
end;
end;
else
ReallocMem(FList, (FCount+1)*SizeOf(Pointer));
locList:=FList;
for i:=Count-1 downto index do
locList[i+1]:=locList[i];
locList[index]:=item;
Inc(FCount);
end;
end;

// Move
//
procedure TTightList.MoveItem(curIndex, newIndex : Integer);
var
item : Pointer;
begin
if (Cardinal(curIndex)>=Cardinal(FCount)) or (Cardinal(newIndex)>=Cardinal(FCount)) then
RaiseIndexOutOfBounds
else begin
case curIndex-newIndex of
0 : ; // ignore
-1, 1 : Exchange(curIndex, newIndex);
else
item:=FList[curIndex];
Delete(curIndex);
Insert(newIndex, item);
end;
end;
end;

// Exchange
//
procedure TTightList.Exchange(index1, index2 : Integer);
var
item : Pointer;
begin
if index1<>index2 then begin
item:=FList[index1];
FList[index1]:=FList[index2];
FList[index2]:=item;
end;
end;

// RaiseIndexOutOfBounds
//
procedure TTightList.RaiseIndexOutOfBounds;
begin
raise ETightListOutOfBound.Create('List index out of bounds');
end;

// ------------------
// ------------------ TObjectList<T> ------------------
// ------------------

// Destroy
//
destructor TObjectList<T>.Destroy;
begin
Clear;
inherited;
end;

// GetItem
//
function TObjectList<T>.GetItem(index : Integer) : T;
begin
Result:=FItems[index];
end;

// SetItem
//
procedure TObjectList<T>.SetItem(index : Integer; const item : T);
begin
FItems[index]:=item;
end;

// Add
//
function TObjectList<T>.Add(const anItem : T) : Integer;
begin
if Count=Length(FItems) then
SetLength(FItems, Count+8+(Count shr 4));
FItems[FCount]:=anItem;
Result:=FCount;
Inc(FCount);
end;

// IndexOf
//
function TObjectList<T>.IndexOf(const anItem : T) : Integer;
var
i : Integer;
begin
for i:=0 to Count-1 do
if FItems[i]=anItem then Exit(i);
Result:=-1;
end;

// Extract
//
function TObjectList<T>.Extract(idx : Integer) : T;
begin
Result:=FItems[idx];
System.Move(FItems[idx+1], FItems[idx], SizeOf(T)*(Count-1-idx));
Dec(FCount);
end;

// ExtractAll
//
procedure TObjectList<T>.ExtractAll;
begin
FCount:=0;
end;

// Clear
//
procedure TObjectList<T>.Clear;
var
i : Integer;
begin
for i:=FCount-1 downto 0 do
FItems[i].Free;
FCount:=0;
end;

// ------------------
// ------------------ TSortedList<T> ------------------
// ------------------

// GetItem
//
function TSortedList<T>.GetItem(index : Integer) : T;
begin
Result:=FItems[index];
end;

// Find
//
function TSortedList<T>.Find(const item : T; var index : Integer) : Boolean;
var
lo, hi, mid, compResult : Integer;
begin
Result:=False;
lo:=0;
hi:=FCount-1;
while lo<=hi do begin
mid:=(lo+hi) shr 1;
compResult:=Compare(FItems[mid], item);
if compResult<0 then
lo:=mid+1
else begin
hi:=mid- 1;
if compResult=0 then
Result:=True;
end;
end;
index:=lo;
end;

// InsertItem
//
procedure TSortedList<T>.InsertItem(index : Integer; const anItem : T);
begin
if Count=Length(FItems) then
SetLength(FItems, Count+8+(Count shr 4));
if index<Count then
System.Move(FItems[index], FItems[index+1], (Count-index)*SizeOf(Pointer));
Inc(FCount);
FItems[index]:=anItem;
end;

// Add
//
function TSortedList<T>.Add(const anItem : T) : Integer;
begin
Find(anItem, Result);
InsertItem(Result, anItem);
end;

// AddOrFind
//
function TSortedList<T>.AddOrFind(const anItem : T; var added : Boolean) : Integer;
begin
added:=not Find(anItem, Result);
if added then
InsertItem(Result, anItem);
end;

// Extract
//
function TSortedList<T>.Extract(const anItem : T) : Integer;
begin
if Find(anItem, Result) then
ExtractAt(Result)
else Result:=-1;
end;

// ExtractAt
//
function TSortedList<T>.ExtractAt(index : Integer) : T;
var
n : Integer;
begin
Dec(FCount);
Result:=FItems[index];
n:=FCount-index;
if n>0 then
System.Move(FItems[index+1], FItems[index], n*SizeOf(T));
SetLength(FItems, FCount);
end;

// IndexOf
//
function TSortedList<T>.IndexOf(const anItem : T) : Integer;
begin
if not Find(anItem, Result) then
Result:=-1;
end;

// Clear
//
procedure TSortedList<T>.Clear;
begin
SetLength(FItems, 0);
FCount:=0;
end;

// Clean
//
procedure TSortedList<T>.Clean;
var
i : Integer;
begin
for i:=0 to FCount-1 do
FItems[i].Free;
Clear;
end;

// Enumerate
//
procedure TSortedList<T>.Enumerate(const callback : TSimpleCallback<T>);
var
i : Integer;
begin
for i:=0 to Count-1 do
if callback(FItems[i])=csAbort then
Break;
end;

// ------------------
// ------------------ TSimpleStack<T> ------------------
// ------------------

// Grow
//
procedure TSimpleStack<T>.Grow;
begin
FCapacity:=FCapacity+8+(FCapacity shr 2);
SetLength(FItems, FCapacity);
end;

// Push
//
procedure TSimpleStack<T>.Push(const item : T);
begin
if FCount=FCapacity then Grow;
FItems[FCount]:=item;
Inc(FCount);
end;

// Pop
//
procedure TSimpleStack<T>.Pop;
begin
Dec(FCount);
end;

// GetPeek
//
function TSimpleStack<T>.GetPeek : T;
begin
Result:=FItems[FCount-1];
end;

// SetPeek
//
procedure TSimpleStack<T>.SetPeek(const item : T);
begin
FItems[FCount-1]:=item;
end;

// GetItems
//
function TSimpleStack<T>.GetItems(const position : Integer) : T;
begin
Result:=FItems[FCount-1-position];
end;

// SetItems
//
procedure TSimpleStack<T>.SetItems(const position : Integer; const value : T);
begin
FItems[FCount-1-position]:=value;
end;

// Clear
//
procedure TSimpleStack<T>.Clear;
begin
SetLength(FItems, 0);
FCount:=0;
FCapacity:=0;
end;

// ------------------
// ------------------ TWriteOnlyBlockStream ------------------
// ------------------

// Create
//
constructor TWriteOnlyBlockStream.Create;
begin
inherited Create;
AllocateCurrentBlock;
end;

// Destroy
//
destructor TWriteOnlyBlockStream.Destroy;
begin
inherited;
FreeBlocks;
end;

var
vWOBSPool : Pointer;

// AllocFromPool
//
class function TWriteOnlyBlockStream.AllocFromPool : TWriteOnlyBlockStream;
begin
Result:=InterlockedExchangePointer(vWOBSPool, nil);
if Result=nil then
Result:=TWriteOnlyBlockStream.Create;
end;

// ReturnToPool
//
procedure TWriteOnlyBlockStream.ReturnToPool;
var
wobs : TWriteOnlyBlockStream;
begin
if Self=nil then Exit;
Clear;
if vWOBSPool=nil then begin
wobs:=InterlockedExchangePointer(vWOBSPool, Self);
if wobs<>nil then
wobs.Destroy;
end else Destroy;
end;

// FreeBlocks
//
procedure TWriteOnlyBlockStream.FreeBlocks;
var
iterator, next : PPointerArray;
begin
iterator:=FFirstBlock;
while iterator<>nil do begin
next:=PPointerArray(iterator[0]);
FreeMem(iterator);
iterator:=next;
end;
FCurrentBlock:=nil;
FFirstBlock:=nil;
FTotalSize:=0;
end;

// AllocateCurrentBlock
//
procedure TWriteOnlyBlockStream.AllocateCurrentBlock;
var
newBlock : PPointerArray;
begin
GetMem(newBlock, cWriteOnlyBlockStreamBlockSize+2*SizeOf(Pointer));
newBlock[0]:=nil;
FBlockRemaining:=@newBlock[1];
FBlockRemaining^:=0;

if FCurrentBlock<>nil then
FCurrentBlock[0]:=newBlock
else FFirstBlock:=newBlock;
FCurrentBlock:=newBlock;
end;

// Clear
//
procedure TWriteOnlyBlockStream.Clear;
begin
FreeBlocks;
AllocateCurrentBlock;
end;

// StoreData
//
procedure TWriteOnlyBlockStream.StoreData(var buffer);
var
n : Integer;
iterator : PPointerArray;
dest : PByteArray;
begin
dest:=@buffer;
iterator:=FFirstBlock;
while iterator<>nil do begin
n:=PInteger(@iterator[1])^;
if n>0 then begin
System.Move(iterator[2], dest^, n);
dest:=@dest[n];
end;
iterator:=iterator[0];
end;
end;

// StoreData
//
procedure TWriteOnlyBlockStream.StoreData(destStream : TStream);
var
n : Integer;
iterator : PPointerArray;
begin
iterator:=FFirstBlock;
while iterator<>nil do begin
n:=PInteger(@iterator[1])^;
destStream.Write(iterator[2], n);
iterator:=iterator[0];
end;
end;

// StoreUTF8Data
//
procedure TWriteOnlyBlockStream.StoreUTF8Data(destStream : TStream);
var
buf : UTF8String;
begin
buf:=UTF8Encode(ToString);
if buf<>'' then
destStream.Write(buf[1], Length(buf));
end;

// Seek
//
function TWriteOnlyBlockStream.Seek(Offset: Longint; Origin: Word): Longint;
begin
if (Origin=soFromCurrent) and (Offset=0) then
Result:=FTotalSize
else raise EStreamError.Create('not allowed');
end;

// Read
//
function TWriteOnlyBlockStream.Read(var Buffer; Count: Longint): Longint;
begin
raise EStreamError.Create('not allowed');
end;

// WriteSpanning
//
procedure TWriteOnlyBlockStream.WriteSpanning(source : PByteArray; count : Integer);
begin
// current block contains some data, write fraction, allocate new block
System.Move(source^, PByteArray(@FCurrentBlock[2])[FBlockRemaining^], count);
FBlockRemaining^:=cWriteOnlyBlockStreamBlockSize;

AllocateCurrentBlock;
end;

// WriteLarge
//
procedure TWriteOnlyBlockStream.WriteLarge(source : PByteArray; count : Integer);
var
newBlock : PPointerArray;
begin
// large amount still to be written, insert specific block
newBlock:=GetMemory(count+2*SizeOf(Pointer));
newBlock[0]:=FCurrentBlock;
PInteger(@newBlock[1])^:=count;
System.Move(source^, newBlock[2], count);
FCurrentBlock[0]:=newBlock;
FCurrentBlock:=newBlock;
AllocateCurrentBlock;
end;

// WriteBuf
//
procedure TWriteOnlyBlockStream.WriteBuf(source : PByteArray; count : Integer);
type
TThreeBytes = packed array [1..3] of Byte;
PThreeBytes = ^TThreeBytes;
TFiveBytes = packed array [1..5] of Byte;
PFiveBytes = ^TFiveBytes;
TSixBytes = packed array [1..6] of Byte;
PSixBytes = ^TSixBytes;
TSevenBytes = packed array [1..7] of Byte;
PSevenBytes = ^TSevenBytes;
var
dest : PByteArray;
fraction : Integer;
begin
Inc(FTotalSize, count);

fraction:=cWriteOnlyBlockStreamBlockSize-FBlockRemaining^;
if count>fraction then begin
// does not fit in current block
// was current block started?
if FBlockRemaining^>0 then begin
WriteSpanning(source, fraction);
Dec(count, fraction);
source:=@source[fraction];
end;
if count>cWriteOnlyBlockStreamBlockSize div 2 then begin
WriteLarge(source, count);
Exit;
end;
end;

// if we reach here, everything fits in current block
dest:=@PByteArray(@FCurrentBlock[2])[FBlockRemaining^];
Inc(FBlockRemaining^, count);
case Cardinal(count) of
0 : ;
1 : dest[0]:=source[0];
2 : PWord(dest)^:=PWord(source)^;
3 : PThreeBytes(dest)^:=PThreeBytes(source)^;
4 : PCardinal(dest)^:=PCardinal(source)^;
5 : PFiveBytes(dest)^:=PFiveBytes(source)^;
6 : PSixBytes(dest)^:=PSixBytes(source)^;
7 : PSevenBytes(dest)^:=PSevenBytes(source)^;
8 : PInt64(dest)^:=PInt64(source)^;
else
System.Move(source^, dest^, count);
end;
end;

// Write
//
function TWriteOnlyBlockStream.Write(const buffer; count: Longint): Longint;
begin
WriteBuf(@buffer, count);
Result:=count;
end;

// WriteByte
//
procedure TWriteOnlyBlockStream.WriteByte(b : Byte);
begin
WriteBuf(@b, 1);
end;

// WriteBytes
//
procedure TWriteOnlyBlockStream.WriteBytes(const b : array of Byte);
var
n : Integer;
begin
n:=Length(b);
if n>0 then
WriteBuf(@b[0], Length(b));
end;

// WriteInt32
//
procedure TWriteOnlyBlockStream.WriteInt32(const i : Integer);
begin
WriteBuf(@i, 4);
end;

// WriteDWord
//
procedure TWriteOnlyBlockStream.WriteDWord(const dw : DWORD);
begin
WriteBuf(@dw, 4);
end;

// WriteString
//
procedure TWriteOnlyBlockStream.WriteString(const utf16String : UnicodeString);
var
stringCracker : NativeUInt;
begin
{$ifdef FPC}
if utf16String<>'' then
WriteBuf(utf16String[1], Length(utf16String)*SizeOf(WideChar));
{$else}
stringCracker:=NativeUInt(utf16String);
if stringCracker<>0 then
WriteBuf(Pointer(stringCracker), PInteger(stringCracker-SizeOf(Integer))^*SizeOf(WideChar));
{$endif}
end;

// WriteString (Int32)
//
procedure TWriteOnlyBlockStream.WriteString(const i : Int32);
var
buf : TInt32StringBuffer;
n : Integer;
begin
n:=FastInt32ToBuffer(i, buf);
WriteBuf(@buf[n], (High(buf)+1-n)*SizeOf(WideChar));
end;

// WriteString (Int64)
//
procedure TWriteOnlyBlockStream.WriteString(const i : Int64);
var
buf : TInt64StringBuffer;
n : Integer;
begin
n:=FastInt64ToBuffer(i, buf);
WriteBuf(@buf[n], (High(buf)+1-n)*SizeOf(WideChar));
end;

// WriteChar
//
procedure TWriteOnlyBlockStream.WriteChar(utf16Char : WideChar);
begin
WriteBuf(@utf16Char, SizeOf(WideChar));
end;

// WriteDigits
//
procedure TWriteOnlyBlockStream.WriteDigits(value : Int64; digits : Integer);
var
buf : array [0..19] of WideChar;
n : Integer;
begin
if digits<=0 then Exit;

Assert(digits<Length(buf));
n:=Length(buf);
while digits>0 do begin
Dec(n);
if value<>0 then begin
buf[n]:=WideChar(Ord('0')+(value mod 10));
value:=value div 10;
end else buf[n]:='0';
Dec(digits);
end;

WriteBuf(@buf[n], (Length(buf)-n)*SizeOf(WideChar));
end;

// ToString
//
function TWriteOnlyBlockStream.ToString : String;
{$ifdef FPC}
var
uniBuf : UnicodeString;
begin
if FTotalSize>0 then begin

Assert((FTotalSize and 1) = 0);
SetLength(uniBuf, FTotalSize div SizeOf(WideChar));
StoreData(uniBuf[1]);
Result:=UTF8Encode(uniBuf);

end else Result:='';
{$else}
begin
if FTotalSize>0 then begin

Assert((FTotalSize and 1) = 0);
SetLength(Result, FTotalSize div SizeOf(WideChar));
StoreData(Result[1]);

end else Result:='';
{$endif}
end;

// ToUTF8String
//
function TWriteOnlyBlockStream.ToUTF8String : RawByteString;
begin
Result:=UTF8Encode(ToString);
end;

// ToBytes
//
function TWriteOnlyBlockStream.ToBytes : TBytes;
var
s : Int64;
begin
s:=Size;
SetLength(Result, s);
if s>0 then
StoreData(Result[0]);
end;

// ToRawBytes
//
function TWriteOnlyBlockStream.ToRawBytes : RawByteString;
var
s : Int64;
begin
s:=Size;
SetLength(Result, s);
if s>0 then
StoreData(Result[1]);
end;

// GetSize
//
function TWriteOnlyBlockStream.GetSize: Int64;
begin
Result:=FTotalSize;
end;

// WriteSubString
//
procedure TWriteOnlyBlockStream.WriteSubString(const utf16String : UnicodeString; startPos : Integer);
begin
WriteSubString(utf16String, startPos, Length(utf16String)-startPos+1);
end;

// WriteSubString
//
procedure TWriteOnlyBlockStream.WriteSubString(const utf16String : UnicodeString;
startPos, aLength : Integer);
var
p, n : Integer;
begin
Assert(startPos>=1);

if aLength<=0 then Exit;
p:=startPos+aLength-1;

n:=System.Length(utf16String);
if startPos>n then Exit;

if p>n then
n:=n-startPos+1
else n:=p-startPos+1;

if n>0 then
WriteBuf(@utf16String[startPos], n*SizeOf(WideChar));
end;

// WriteUTF8String
//
procedure TWriteOnlyBlockStream.WriteUTF8String(const utf8String : RawByteString);
begin
WriteBuf(Pointer(utf8String), Length(utf8String));
end;

// WriteCRLF
//
procedure TWriteOnlyBlockStream.WriteCRLF;
begin
WriteBuf(@cCRLF[0], 2*SizeOf(WideChar));
end;

// WriteAsciiCRLF
//
procedure TWriteOnlyBlockStream.WriteAsciiCRLF;
begin
WriteBuf(@cAsciiCRLF[0], 2*SizeOf(AnsiChar));
end;

// ------------------
// ------------------ TTightStack ------------------
// ------------------

// Grow
//
procedure TTightStack.Grow;
begin
FCapacity:=FCapacity+8+FCapacity shr 1;
ReallocMem(FList, FCapacity*SizeOf(Pointer));
end;

// Push
//
procedure TTightStack.Push(item : TRefCountedObject);
begin
if FCount=FCapacity then Grow;
FList[FCount]:=item;
Inc(FCount);
end;

// Peek
//
function TTightStack.Peek : TRefCountedObject;
begin
Result:=FList[FCount-1];
end;

// Pop
//
procedure TTightStack.Pop;
begin
Dec(FCount);
end;

// Clear
//
procedure TTightStack.Clear;
begin
FCount:=0;
end;

// Clean
//
procedure TTightStack.Clean;
begin
while Count>0 do begin
TRefCountedObject(Peek).Free;
Pop;
end;
end;

// Free
//
procedure TTightStack.Free;
begin
FCount:=0;
FCapacity:=0;
FreeMem(FList);
FList:=nil;
end;

// ------------------
// ------------------ TSimpleHash<T> ------------------
// ------------------

// Grow
//
procedure TSimpleHash<T>.Grow;
var
i, j, n : Integer;
hashCode : Integer;
{$IFDEF DELPHI_XE3}
oldBuckets : array of TSimpleHashBucket<T>;
{$ELSE}
oldBuckets : TSimpleHashBucketArray<T>;
{$ENDIF}
begin
if FCapacity=0 then
FCapacity:=32
else FCapacity:=FCapacity*2;
FGrowth:=(FCapacity*11) div 16;

{$IFDEF DELPHI_XE3}
SetLength(oldBuckets, Length(FBuckets));
for i := 0 to Length(FBuckets) - 1 do
oldBuckets[i] := FBuckets[i];
{$ELSE}
oldBuckets:=FBuckets;
{$ENDIF}

FBuckets:=nil;
SetLength(FBuckets, FCapacity);

n:=FCapacity-1;
for i:=0 to High(oldBuckets) do begin
if oldBuckets[i].HashCode=0 then continue;
j:=(oldBuckets[i].HashCode and (FCapacity-1));
while FBuckets[j].HashCode<>0 do
j:=(j+1) and n;
FBuckets[j]:=oldBuckets[i];
end;
end;

// LinearFind
//
function TSimpleHash<T>.LinearFind(const item : T; var index : Integer) : Boolean;
begin
repeat
if FBuckets[index].HashCode=0 then
Exit(False);
if SameItem(item, FBuckets[index].Value) then
Exit(True);
index:=(index+1) and (FCapacity-1);
until False;
end;

// Add
//
function TSimpleHash<T>.Add(const anItem : T) : Boolean;
var
i : Integer;
hashCode : Integer;
begin
if FCount>=FGrowth then Grow;

hashCode:=GetItemHashCode(anItem);
i:=(hashCode and (FCapacity-1));
if LinearFind(anItem, i) then Exit(False);
FBuckets[i].HashCode:=hashCode;
FBuckets[i].Value:=anItem;
Inc(FCount);
Result:=True;
end;

// Replace
//
function TSimpleHash<T>.Replace(const anItem : T) : Boolean;
var
i : Integer;
hashCode : Integer;
begin
if FCount>=FGrowth then Grow;

hashCode:=GetItemHashCode(anItem);
i:=(hashCode and (FCapacity-1));
if LinearFind(anItem, i) then begin
FBuckets[i].Value:=anItem
end else begin
FBuckets[i].HashCode:=hashCode;
FBuckets[i].Value:=anItem;
Inc(FCount);
Result:=True;
end;
end;

// Contains
//
function TSimpleHash<T>.Contains(const anItem : T) : Boolean;
var
i : Integer;
begin
if FCount=0 then Exit(False);
i:=(GetItemHashCode(anItem) and (FCapacity-1));
Result:=LinearFind(anItem, i);
end;

// Match
//
function TSimpleHash<T>.Match(var anItem : T) : Boolean;
var
i : Integer;
begin
if FCount=0 then Exit(False);
i:=(GetItemHashCode(anItem) and (FCapacity-1));
Result:=LinearFind(anItem, i);
if Result then
anItem:=FBuckets[i].Value;
end;

// Enumerate
//
procedure TSimpleHash<T>.Enumerate(callBack : TSimpleHashProc<T>);
var
i : Integer;
begin
for i:=0 to High(FBuckets) do
if FBuckets[i].HashCode<>0 then
callBack(FBuckets[i].Value);
end;

// Clear
//
procedure TSimpleHash<T>.Clear;
begin
FCount:=0;
FCapacity:=0;
FGrowth:=0;
SetLength(FBuckets, 0);
end;

// ------------------
// ------------------ TSimpleObjectHash<T> ------------------
// ------------------

// SameItem
//
function TSimpleObjectHash<T>.SameItem(const item1, item2 : T) : Boolean;
begin
Result:=(item1=item2);
end;

// GetItemHashCode
//
function TSimpleObjectHash<T>.GetItemHashCode(const item1 : T) : Integer;
var
p : NativeInt;
begin
p:=PNativeInt(@item1)^; // workaround compiler issue
Result:=(p shr 4)+1;
end;

// Clean
//
procedure TSimpleObjectHash<T>.Clean;
var
i : Integer;
begin
for i:=0 to FCapacity-1 do
if FBuckets[i].HashCode<>0 then
FBuckets[i].Value.Free;
Clear;
end;

// ------------------
// ------------------ TSimpleList<T> ------------------
// ------------------

// Add
//
procedure TSimpleList<T>.Add(const item : T);
begin
if FCount=FCapacity then Grow;
FItems[FCount]:=item;
Inc(FCount);
end;

// Extract
//
procedure TSimpleList<T>.Extract(idx : Integer);
var
n : Integer;
begin
FItems[idx]:=Default(T);
n:=FCount-idx-1;
if n>0 then begin
Move(FItems[idx+1], FItems[idx], n*SizeOf(T));
FillChar(FItems[FCount-1], SizeOf(T), 0);
end;
Dec(FCount);
end;

// Clear
//
procedure TSimpleList<T>.Clear;
begin
SetLength(FItems, 0);
FCapacity:=0;
FCount:=0;
end;

// Enumerate
//
procedure TSimpleList<T>.Enumerate(const callback : TSimpleCallback<T>);
var
i : Integer;
begin
for i:=0 to Count-1 do
if callBack(FItems[i])=csAbort then
Break;
end;

// Grow
//
procedure TSimpleList<T>.Grow;
begin
FCapacity:=FCapacity+8+(FCapacity shr 2);
SetLength(FItems, FCapacity);
end;

// GetItems
//
function TSimpleList<T>.GetItems(const idx : Integer) : T;
begin
Result:=FItems[idx];
end;

// SetItems
//
procedure TSimpleList<T>.SetItems(const idx : Integer; const value : T);
begin
FItems[idx]:=value;
end;

// ------------------
// ------------------ TObjectsLookup ------------------
// ------------------

// Compare
//
function TObjectsLookup.Compare(const item1, item2 : TRefCountedObject) : Integer;
begin
if NativeUInt(item1)<NativeUInt(item2) then
Result:=-1
else if NativeUInt(item1)=NativeUInt(item2) then
Result:=0
else Result:=-1;
end;

// ------------------
// ------------------ TInterfacedSelfObject ------------------
// ------------------

// GetSelf
//
function TInterfacedSelfObject.GetSelf : TObject;
begin
Result:=Self;
end;

// QueryInterface
//
function TInterfacedSelfObject.QueryInterface({$IFDEF FPC_HAS_CONSTREF}constref{$ELSE}const{$ENDIF} IID: TGUID; out Obj): HResult;
begin
if GetInterface(IID, Obj) then
Result:=0
else Result:=E_NOINTERFACE;
end;

// _AddRef
//
function TInterfacedSelfObject._AddRef: Integer;
begin
Result:=IncRefCount;
end;

// _Release
//
function TInterfacedSelfObject._Release: Integer;
begin
Result:=DecRefCount;
if Result=0 then Destroy;
end;

// NewInstance
//
class function TInterfacedSelfObject.NewInstance: TObject;
begin
Result:=inherited NewInstance;
TRefCountedObject(Result).IncRefCount;
end;

// AfterConstruction
//
procedure TInterfacedSelfObject.AfterConstruction;
begin
// Release the constructor's implicit refcount
DecRefCount;
end;

// BeforeDestruction
//
procedure TInterfacedSelfObject.BeforeDestruction;
begin
Assert(RefCount=0);
end;

// ------------------
// ------------------ TAutoStrings ------------------
// ------------------

// Create
//
constructor TAutoStrings.Create;
begin
FValue:=TStringList.Create;
end;

// Destroy
//
destructor TAutoStrings.Destroy;
begin
FValue.Free;
end;

// CreateCapture
//
constructor TAutoStrings.CreateCapture(value : TStringList);
begin
FValue:=value;
end;

// CreateClone
//
constructor TAutoStrings.CreateClone(value : TStringList);
var
sl : TStringList;
begin
sl:=TStringList.Create;
FValue:=sl;
sl.Assign(value);
sl.CaseSensitive:=value.CaseSensitive;
sl.Sorted:=value.Sorted;
end;

// GetValue
//
function TAutoStrings.GetValue : TStringList;
begin
Result:=FValue;
end;

// Clone
//
function TAutoStrings.Clone : IAutoStrings;
begin
Result:=TAutoStrings.CreateClone(FValue);
end;

// ------------------
// ------------------ TSimpleNameObjectHash<T> ------------------
// ------------------

// Create
//
constructor TSimpleNameObjectHash<T>.Create(initialCapacity : Integer = 0);
begin
if initialCapacity>0 then begin
// check if initial capacity is a power of two
Assert((initialCapacity and (initialCapacity-1))=0);

FCapacity:=initialCapacity;
SetLength(FBuckets, FCapacity);
end;
end;

// Grow
//
procedure TSimpleNameObjectHash<T>.Grow;
var
i, j, n : Integer;
hashCode : Integer;
oldBuckets : TNameObjectHashBuckets;
begin
if FCapacity=0 then
FCapacity:=32
else FCapacity:=FCapacity*2;
FGrowth:=(FCapacity*3) div 4;

oldBuckets:=FBuckets;
FBuckets:=nil;
SetLength(FBuckets, FCapacity);

n:=FCapacity-1;
for i:=0 to High(oldBuckets) do begin
if oldBuckets[i].HashCode=0 then continue;
j:=(oldBuckets[i].HashCode and (FCapacity-1));
while FBuckets[j].HashCode<>0 do
j:=(j+1) and n;
FBuckets[j]:=oldBuckets[i];
end;
end;

// SameItem
//
function TSimpleNameObjectHash<T>.SameItem(const item1, item2 : TNameObjectHashBucket) : Boolean;
begin
Result:=(item1.Name=item2.Name);
end;

// GetItemHashCode
//
function TSimpleNameObjectHash<T>.GetItemHashCode(const item1 : TNameObjectHashBucket) : Integer;
begin
Result:=SimpleStringHash(item1.Name);
end;

// GetObjects
//
function TSimpleNameObjectHash<T>.GetObjects(const aName : UnicodeString) : T;
var
h : Cardinal;
i : Integer;
begin
if FCount=0 then
{$ifdef VER200}
Exit(default(T)); // D2009 support
{$else}
Exit(T(TObject(nil))); // workaround for D2010 compiler bug
{$endif}

h:=SimpleStringHash(aName);
i:=(h and (FCapacity-1));

repeat
with FBuckets[i] do begin
if HashCode=0 then
{$ifdef VER200}
Exit(default(T)); // D2009 support
{$else}
Exit(T(TObject(nil))); // workaround for D2010 compiler bug
{$endif}
if (HashCode=h) and (Name=aName) then begin
Result:=Obj;
Exit;
end;
end;
i:=(i+1) and (FCapacity-1);
until False;
end;

// SetObjects
//
procedure TSimpleNameObjectHash<T>.SetObjects(const aName : UnicodeString; obj : T);
begin
AddObject(aName, obj, True);
end;

// AddObject
//
function TSimpleNameObjectHash<T>.AddObject(const aName : UnicodeString; aObj : T;
replace : Boolean = False) : Boolean;
var
i : Integer;
h : Cardinal;
begin
if FCount>=FGrowth then Grow;

h:=SimpleStringHash(aName);
i:=(h and (FCapacity-1));

repeat
with FBuckets[i] do begin
if HashCode=0 then
Break
else if (HashCode=h) and (Name=aName) then begin
if replace then
Obj:=aObj;
Exit(False);
end;
end;
i:=(i+1) and (FCapacity-1);
until False;

with FBuckets[i] do begin
HashCode:=h;
Name:=aName;
Obj:=aObj;
end;
Inc(FCount);
Result:=True;
end;

// Clean
//
procedure TSimpleNameObjectHash<T>.Clean;
var
i : Integer;
begin
for i:=0 to FCapacity-1 do begin
if FBuckets[i].HashCode<>0 then
FreeAndNil(FBuckets[i].Obj);
end;
Clear;
end;

// Clear
//
procedure TSimpleNameObjectHash<T>.Clear;
begin
SetLength(FBuckets, 0);
FGrowth:=0;
FCount:=0;
FCapacity:=0;
end;

// GetBucketName
//
function TSimpleNameObjectHash<T>.GetBucketName(index : Integer) : String;
begin
Result:=FBuckets[index].Name;
end;

// GetBucketObject
//
function TSimpleNameObjectHash<T>.GetBucketObject(index : Integer) : T;
begin
Result:=FBuckets[index].Obj;
end;

// SetBucketObject
//
procedure TSimpleNameObjectHash<T>.SetBucketObject(index : Integer; obj : T);
begin
FBuckets[index].Obj:=obj;
end;

// ------------------
// ------------------ TRefCountedObject ------------------
// ------------------

// Free
//
procedure TRefCountedObject.Free;
begin
if Self<>nil then
DecRefCount;
end;

// IncRefCount
//
function TRefCountedObject.IncRefCount : Integer;
var
p : PInteger;
begin
{$ifdef FPC}
p:=@FRefCount;
{$else}
p:=PInteger(NativeInt(Self)+InstanceSize-hfFieldSize+hfMonitorOffset);
{$endif}
Result:=InterlockedIncrement(p^);
end;

// DecRefCount
//
function TRefCountedObject.DecRefCount : Integer;
var
p : PInteger;
begin
{$ifdef FPC}
p:=@FRefCount;
{$else}
p:=PInteger(NativeInt(Self)+InstanceSize-hfFieldSize+hfMonitorOffset);
{$endif}
if p^=0 then begin
Destroy;
Result:=0;
end else Result:=InterlockedDecrement(p^);
end;

// GetRefCount
//
function TRefCountedObject.GetRefCount : Integer;
var
p : PInteger;
begin
{$ifdef FPC}
p:=@FRefCount;
{$else}
p:=PInteger(NativeInt(Self)+InstanceSize-hfFieldSize+hfMonitorOffset);
{$endif}
Result:=p^;
end;

// SetRefCount
//
procedure TRefCountedObject.SetRefCount(n : Integer);
var
p : PInteger;
begin
{$ifdef FPC}
p:=@FRefCount;
{$else}
p:=PInteger(NativeInt(Self)+InstanceSize-hfFieldSize+hfMonitorOffset);
{$endif}
p^:=n;
end;

// ------------------
// ------------------ TSimpleObjectObjectHash<T1, T2> ------------------
// ------------------

// Grow
//
procedure TSimpleObjectObjectHash<TKey, TValue>.Grow;
var
i, j, n : Integer;
hashCode : Integer;
oldBuckets : TObjectObjectHashBuckets;
begin
if FCapacity=0 then
FCapacity:=32
else FCapacity:=FCapacity*2;
FGrowth:=(FCapacity*3) div 4;

oldBuckets:=FBuckets;
FBuckets:=nil;
SetLength(FBuckets, FCapacity);

n:=FCapacity-1;
for i:=0 to High(oldBuckets) do begin
if oldBuckets[i].HashCode=0 then continue;
j:=(oldBuckets[i].HashCode and (FCapacity-1));
while FBuckets[j].HashCode<>0 do
j:=(j+1) and n;
FBuckets[j]:=oldBuckets[i];
end;
end;

// GetItemHashCode
//
function TSimpleObjectObjectHash<TKey, TValue>.GetItemHashCode(const item1 : TObjectObjectHashBucket) : Integer;
begin
Result:=(PNativeInt(@item1.Key)^ shr 2);
end;

// GetValue
//
function TSimpleObjectObjectHash<TKey, TValue>.GetValue(aKey : TKey) : TValue;
var
bucket : TObjectObjectHashBucket;
begin
bucket.Key:=aKey;
if Match(bucket) then
Result:=bucket.Value
{$ifdef VER200}
else Result:=default(TValue); // D2009 support
{$else}
else Result:=TValue(TObject(nil)); // workaround for D2010 compiler bug
{$endif}
end;

// SetValue
//
procedure TSimpleObjectObjectHash<TKey, TValue>.SetValue(aKey : TKey; aValue : TValue);
var
bucket : TObjectObjectHashBucket;
begin
bucket.Key:=aKey;
bucket.Value:=aValue;
Replace(bucket);
end;

// LinearFind
//
function TSimpleObjectObjectHash<TKey, TValue>.LinearFind(const item : TObjectObjectHashBucket; var index : Integer) : Boolean;
begin
repeat
if FBuckets[index].HashCode=0 then
Exit(False);
if item.Key=FBuckets[index].Key then
Exit(True);
index:=(index+1) and (FCapacity-1);
until False;
end;

// Match
//
function TSimpleObjectObjectHash<TKey, TValue>.Match(var anItem : TObjectObjectHashBucket) : Boolean;
var
i : Integer;
begin
if FCount=0 then Exit(False);
i:=(GetItemHashCode(anItem) and (FCapacity-1));
Result:=LinearFind(anItem, i);
if Result then
anItem:=FBuckets[i];
end;

// Replace
//
function TSimpleObjectObjectHash<TKey, TValue>.Replace(const anItem : TObjectObjectHashBucket) : Boolean;
var
i : Integer;
hashCode : Integer;
begin
if FCount>=FGrowth then Grow;

hashCode:=GetItemHashCode(anItem);
i:=(hashCode and (FCapacity-1));
if LinearFind(anItem, i) then begin
FBuckets[i]:=anItem
end else begin
FBuckets[i]:=anItem;
FBuckets[i].HashCode:=hashCode;
Inc(FCount);
Result:=True;
end;
end;

// CleanValues
//
procedure TSimpleObjectObjectHash<TKey, TValue>.CleanValues;
var
i : Integer;
begin
for i:=0 to FCapacity-1 do begin
if FBuckets[i].HashCode<>0 then
FBuckets[i].Value.Free;
end;
Clear;
end;

// Clear
//
procedure TSimpleObjectObjectHash<TKey, TValue>.Clear;
begin
FCount:=0;
FCapacity:=0;
FGrowth:=0;
SetLength(FBuckets, 0);
end;

// ------------------
// ------------------ TThreadCached<T> ------------------
// ------------------

// Create
//
constructor TThreadCached<T>.Create(const aNeedValue : TSimpleCallback<T>; maxAgeMSec : Integer);
begin
FLock:=TFixedCriticalSection.Create;
FOnNeedValue:=aNeedValue;
FMaxAge:=maxAgeMSec*cMSecToDateTime;
end;

// Destroy
//
destructor TThreadCached<T>.Destroy;
begin
FLock.Free;
end;

// Invalidate
//
procedure TThreadCached<T>.Invalidate;
begin
FExpiresAt:=0;
end;

// GetValue
//
function TThreadCached<T>.GetValue : T;
var
ts : TDateTime;
begin
FLock.Enter;
try
ts:=Now;
if ts>=FExpiresAt then begin
if FOnNeedValue(FValue)=csContinue then
FExpiresAt:=ts+FMaxAge;
end;
Result:=FValue;
finally
FLock.Leave;
end;
end;

// SetValue
//
procedure TThreadCached<T>.SetValue(const v : T);
begin
FLock.Enter;
try
FExpiresAt:=Now+FMaxAge;
FValue:=v;
finally
FLock.Leave;
end;
end;

// ------------------
// ------------------ TSimpleIntegerStack ------------------
// ------------------

// Create
//
constructor TSimpleIntegerStack.Create;
begin
FChunk:=@FBaseChunk;
FChunkIndex:=-1;
end;

// Destroy
//
destructor TSimpleIntegerStack.Destroy;
begin
Clear;
end;

// Allocate
//
class function TSimpleIntegerStack.Allocate : TSimpleIntegerStack;
var
p : Pointer;
n : Integer;
begin
n:=InstanceSize;
GetMem(p, n);
Move(Pointer(vTemplate)^, p^, n);
Result:=TSimpleIntegerStack(p);
Result.FChunk:=@Result.FBaseChunk;
end;

// Push
//
procedure TSimpleIntegerStack.Push(const item : Integer);
begin
if FChunkIndex<TSimpleIntegerStackChunk.ChunkSize-1 then
Inc(FChunkIndex)
else Grow;
FChunk.Data[FChunkIndex]:=item;
Inc(FCount);
end;

// Pop
//
procedure TSimpleIntegerStack.Pop;
begin
if FChunkIndex>0 then
Dec(FChunkIndex)
else Shrink;
Dec(FCount);
end;

// Clear
//
procedure TSimpleIntegerStack.Clear;
var
p : PSimpleIntegerStackChunk;
begin
if FPooledChunk<>nil then
FreeMem(FPooledChunk);
FPooledChunk:=nil;
while FChunk<>@FBaseChunk do begin
p:=FChunk;
FChunk:=p.Prev;
FreeMem(p);
end;
end;

// Grow
//
procedure TSimpleIntegerStack.Grow;
var
p : PSimpleIntegerStackChunk;
begin
if FPooledChunk<>nil then begin
p:=FPooledChunk;
FPooledChunk:=nil;
end else GetMem(p, SizeOf(TSimpleIntegerStackChunk));
p.Prev:=FChunk;
FChunk:=p;
FChunkIndex:=0;
end;

// Shrink
//
procedure TSimpleIntegerStack.Shrink;
begin
if FChunk.Prev=nil then
Dec(FChunkIndex)
else begin
FreeMem(FPooledChunk);
FPooledChunk:=FChunk;
FChunk:=FChunk.Prev;
FChunkIndex:=TSimpleIntegerStackChunk.ChunkSize-1;
end;
end;

// GetPeek
//
function TSimpleIntegerStack.GetPeek : Integer;
begin
Result:=FChunk.Data[FChunkIndex];
end;

// SetPeek
//
procedure TSimpleIntegerStack.SetPeek(const item : Integer);
begin
FChunk.Data[FChunkIndex]:=item;
end;

// ------------------
// ------------------ TClassCloneConstructor<T> ------------------
// ------------------

// Initialize
//
procedure TClassCloneConstructor<T>.Initialize(aTemplate : T);
begin
FTemplate:=aTemplate;
FSize:= FTemplate.InstanceSize;
end;

// Finalize
//
procedure TClassCloneConstructor<T>.Finalize;
begin
FreeAndNil(FTemplate);
end;

// Create
//
function TClassCloneConstructor<T>.Create : T;
begin
GetMemForT(Result, FSize);
Move(TtoPointer(FTemplate)^, TtoPointer(Result)^, FSize);
end;

// ------------------
// ------------------ TQuickSort ------------------
// ------------------

// Sort
//
procedure TQuickSort.Sort(minIndex, maxIndex : Integer);
var
i, j, p, n : Integer;
begin
n:=maxIndex-minIndex;
case n of
1 : begin
if CompareMethod(minIndex, maxIndex)>0 then
SwapMethod(minIndex, maxIndex);
end;
2 : begin
i:=minIndex+1;
if CompareMethod(minIndex,i)>0 then
SwapMethod(minIndex, i);
if CompareMethod(i, maxIndex)>0 then begin
SwapMethod(i, maxIndex);
if CompareMethod(minIndex, i)>0 then
SwapMethod(minIndex, i);
end;
end;
else
if n<=0 then Exit;
repeat
i:=minIndex;
j:=maxIndex;
p:=((i+j) shr 1);
repeat
while CompareMethod(i, p)<0 do Inc(i);
while CompareMethod(j, p)>0 do Dec(j);
if i<=j then begin
SwapMethod(i, j);
if p=i then
p:=j
else if p=j then
p:=i;
Inc(i);
Dec(j);
end;
until i>j;
if minIndex<j then
Sort(minIndex, j);
minIndex:=i;
until i>=maxIndex;
end;
end;

// ------------------
// ------------------ TSimpleQueue<T> ------------------
// ------------------

// Create
//
constructor TSimpleQueue<T>.Create(poolSize: Integer);
begin
FPoolLeft:=poolSize;
end;

// Destroy
//
destructor TSimpleQueue<T>.Destroy;
var
next : PItemT;
begin
Clear;
while FPool<>nil do begin
next:=FPool.Next;
FreeMem(FPool);
FPool:=next;
end;
inherited;
end;

// Alloc
//
function TSimpleQueue<T>.Alloc: PItemT;
begin
if FPool=nil then
Result:=AllocMem(SizeOf(ItemT))
else begin
Result:=FPool;
FPool:=Result.Next;
Result.Next:=nil;
Inc(FPoolLeft);
end;
Inc(FCount);
end;

// Release
//
procedure TSimpleQueue<T>.Release(i: PItemT);
begin
i.Value:=Default(T);
if FPoolLeft>0 then begin
Dec(FPoolLeft);
i.Prev:=nil;
i.Next:=FPool;
FPool:=i;
end else FreeMem(i);
Dec(FCount);
end;

// Push
//
procedure TSimpleQueue<T>.Push(const v: T);
var
p : PItemT;
begin
p:=Alloc;
p.Value:=v;
if FLast<>nil then begin
p.Prev:=FLast;
FLast.Next:=p;
end else FFirst:=p;
FLast:=p;
end;

// Pop
//
function TSimpleQueue<T>.Pop(var v: T) : Boolean;
var
p : PItemT;
begin
if FCount=0 then Exit(False);

p:=FLast;
FLast:=p.Prev;
v:=p.Value;
Release(p);
if FLast<>nil then
FLast.Next:=nil
else FFirst:=FLast;
Result:=True;
end;

// Pop
//
function TSimpleQueue<T>.Pop : T;
begin
Assert(Count>0);
Pop(Result);
end;

// Insert
//
procedure TSimpleQueue<T>.Insert(const v: T);
var
p : PItemT;
begin
p:=Alloc;
p.Value:=v;
if FFirst<>nil then begin
p.Next:=FFirst;
FFirst.Prev:=p;
end else FLast:=p;
FFirst:=p;
end;

// Pull
//
function TSimpleQueue<T>.Pull(var v: T) : Boolean;
var
p : PItemT;
begin
if FCount=0 then Exit(False);

p:=FFirst;
FFirst:=p.Next;
v:=p.Value;
Release(p);
if FFirst<>nil then
FFirst.Prev:=nil
else FLast:=FFirst;
Result:=True;
end;

// Pull
//
function TSimpleQueue<T>.Pull : T;
begin
Assert(Count>0);
Pull(Result);
end;

// Clear
//
procedure TSimpleQueue<T>.Clear;
var
p, pNext : PItemT;
begin
p:=FFirst;
while p<>nil do begin
pNext:=p.Next;
Release(p);
p:=pNext;
end;
FFirst:=nil;
FLast:=nil;
end;

// ------------------
// ------------------ EdwsVariantTypeCastError ------------------
// ------------------

// Create
//
constructor EdwsVariantTypeCastError.Create(const v : Variant;
const desiredType : UnicodeString; originalException : Exception);
begin
inherited CreateFmt(RTE_VariantCastFailed,
[VarTypeAsText(VarType(v)), desiredType, originalException.ClassName])

end;

// ------------------------------------------------------------------
// ------------------------------------------------------------------
// ------------------------------------------------------------------
initialization
// ------------------------------------------------------------------
// ------------------------------------------------------------------
// ------------------------------------------------------------------

InitializeSmallIntegers;
InitializeStringsUnifier;
TSimpleIntegerStack.vTemplate:=TSimpleIntegerStack.Create;

finalization

FinalizeStringsUnifier;
TSimpleIntegerStack.vTemplate.Free;
TObject(vWOBSPool).Free;

end.

Change log

r2568 by zarglu on Jul 3, 2014   Diff
Fixed support of nil meta parameters +
test
Improved Variant to Int64 conversions
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Older revisions

r2556 by zarglu on Jun 11, 2014   Diff
Faster FastInt64ToStr for small
integers
r2550 by zarglu on Jun 4, 2014   Diff
Support 8bit strings in
VariantToString
r2527 by zarglu on Apr 23, 2014   Diff
Accept ISO8601 format with no trailing
Z
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