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ropes.pas
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{$MODE OBJFPC} { -*- delphi -*- }
{$INCLUDE settings.inc}
unit ropes;
// Note: This is not a http://en.wikipedia.org/wiki/Rope_(data_structure)
// It's just a way to create a string by just referencing underlying strings.
// WARNING: It's very easy, with this API, to shoot yourself in the
// foot. In particular, never assign a rope to another unless you
// immediately discard the former; you'll end up with pointers
// pointing into all kinds of crazy locations and will either crash or
// have security bugs.
interface
uses unicode, utf8;
// Avoid assigning Ropes to other objects (e.g. pass them around using
// pointers or as var or constref arguments). It's ok to do so, but
// it's expensive, since we have to do an exception-safe, thread-safe
// locked reference count inc/dec.
// XXX improvements:
// - avoid Length(), it's expensive
// - make kMinSubslots bigger
type
PRope = ^Rope;
RopeInternals = record
private
type
TRopeFragmentKind = (rfUTF8Buffer, rfUTF8Inline, rfCodepoints);
strict private
type
TFixedSizeRopeFragment = record
case TRopeFragmentKind of
rfUTF8Buffer: (BufferValue: PByte; BufferLength: Cardinal);
rfUTF8Inline: (InlineValue: array[0..0] of Byte; InlineLength: Byte); // store at least one byte
rfCodepoints: (CodepointsValue: array[0..1] of TUnicodeCodepoint; CodepointsLength: Byte); // store at least two characters
end;
private
const
FragmentPayloadSize = SizeOf(TFixedSizeRopeFragment);
UTF8InlineSize = FragmentPayloadSize - SizeOf(Byte);
CodepointsSize = (FragmentPayloadSize-SizeOf(Byte)) div SizeOf(TUnicodeCodepoint);
type
TUTF8InlineIndex = 0..UTF8InlineSize-1;
TUTF8InlineIndexPlusOne = 0..UTF8InlineSize;
TCodepointsIndex = 0..CodepointsSize-1;
TCodepointsIndexPlusOne = 0..CodepointsSize;
TInlineString = String[UTF8InlineSize];
PRopeFragment = ^TRopeFragment;
TRopeFragment = record
Next: PRopeFragment;
case Kind: TRopeFragmentKind of
// it's safe to assume that the first two here end on UTF-8 character boundaries
rfUTF8Buffer: (BufferValue: PByte; BufferLength: Cardinal);
rfUTF8Inline: (InlineValue: array[TUTF8InlineIndex] of Byte; InlineLength: Byte); // make sure this has a trailing zero so we can decode it safely
rfCodepoints: (CodepointsValue: array[TCodepointsIndex] of TUnicodeCodepoint; CodepointsLength: Byte);
end;
TRopeFragmentPosition = record // http://bugs.freepascal.org/view.php?id=26402
CurrentFragment: PRopeFragment;
case TRopeFragmentKind of // CurrentFragment.Kind
rfUTF8Buffer: (BufferIndex: Cardinal; BufferCodepointLength: TZeroableUTF8SequenceLength);
rfUTF8Inline: (InlineIndex: TUTF8InlineIndexPlusOne; InlineCodepointLength: TZeroableUTF8SequenceLength);
rfCodepoints: (CodepointsIndex: TCodepointsIndexPlusOne; CodepointsIndexIncluded: Boolean);
end;
function Serialise(const FirstFragment: PRopeFragment): UTF8String;
end;
TRopePointer = record
private
{$IFOPT C+} FRope: PRope; {$ENDIF}
FPosition: RopeInternals.TRopeFragmentPosition;
FCurrentCharacter: TUnicodeCodepoint;
public
{$IFOPT C+} function IsZeroWidth(): Boolean; {$ENDIF}
{$IFOPT C+} function IsEOF(): Boolean; {$ENDIF}
{$IFOPT C+} procedure AssertIdentity(const Data: PRope); {$ENDIF}
procedure AdvanceToAfter(); inline; // changes to a zero-width pointer; only valid if currently non-zero
procedure ReadCurrent();
procedure AdvanceToNext();
procedure AdvanceToNextFaster(); // still slow, but does not keep track of current character
procedure SetToZeroWidth(); inline; // changes to a zero-width pointer
property CurrentCharacter: TUnicodeCodepoint read FCurrentCharacter; // only valid after AdvanceToNext() or ReadCurrent()
end;
CutRope = record
// use this kind of rope when you want to make sure that if it is appended to another rope,
// it's done as cheaply as currently supported
private
FValue: array of RopeInternals.TRopeFragment; // never grow this array once it's done, or you'll trash the Next pointers
{$IFOPT C+} FRead: Boolean; {$ENDIF}
function GetIsEmpty(): Boolean; inline;
function GetAsString(): UTF8String;
public
class function CreateFrom(const NewString: TUnicodeCodepointArray): CutRope; static; inline;
class function CreateFrom(const NewString: UTF8String): CutRope; static; inline; // this had better be a constant string
function GetAsStringSlow(): UTF8String; // same as .AsString, but allows you to do it more thn once which is a waste in production code)
property IsEmpty: Boolean read GetIsEmpty;
property AsString: UTF8String read GetAsString; // destroys self, to encourage memoisation by the caller if necessary
end;
RopeEnumerator = class;
Rope = record
private
const
kMinBaseSlots = 3;
kMinSubslots = 5;
var
FFilledLength, FLastArrayFilledLength: Cardinal;
FLast: RopeInternals.PRopeFragment;
FValue: array of array of RopeInternals.TRopeFragment;
procedure EnsureSize(const NeededBaseSlots: Cardinal = 1; const NeededSubslots: Cardinal = 1); inline; // inline even though it's complex, because we call it with constants and i want parts of it to get optimised away
// note: never grow a subslot array, since doing so would move the data around and you'd have to redo all the Next pointers
function GetIsEmpty(): Boolean; inline;
function GetAsString(): UTF8String;
public
{$IFOPT C+} procedure AssertInit(); {$ENDIF}
procedure AppendDestructively(var NewString: CutRope); inline; // destroys argument
procedure AppendDestructively(var NewString: Rope); inline; // destroys argument
procedure Append(const NewString: PUTF8String); inline;
procedure Append(const NewString: RopeInternals.TInlineString); inline;
procedure Append(const NewString: TUnicodeCodepoint); inline;
procedure Append(const NewString: TUnicodeCodepointArray); inline; // length of data must be <= CodepointsSize (2)
procedure Append(const NewData: Pointer; const NewLength: QWord); inline;
procedure AppendPossiblyIncomplete(const NewData: Pointer; const NewLength: QWord); inline; unimplemented;
function Extract(constref NewStart, NewEnd: TRopePointer): CutRope; inline;
// includes NewEnd if it is non-zero-width, excludes otherwise
// this does a memory copy into a new string
function ExtractAll(): CutRope; inline;
function ExtractToEnd(constref NewStart: TRopePointer): CutRope; inline;
function CountCharacters(constref NewStart, NewEnd: TRopePointer): Cardinal; inline;
// includes NewEnd if it is non-zero-width, excludes otherwise
// note: this one is expensive (it iterates over the string, parsing UTF8)
function GetEnumerator(): RopeEnumerator; inline;
property IsEmpty: Boolean read GetIsEmpty;
property AsString: UTF8String read GetAsString;
end;
RopeEnumerator = class
private
FPointer: TRopePointer;
public
constructor Create(const NewTarget: PRope);
{$IFOPT C+} procedure AssertIdentity(constref Target: Rope); {$ENDIF}
function MoveNext(): Boolean; inline;
property Current: TUnicodeCodepoint read FPointer.FCurrentCharacter;
function GetPointer(): TRopePointer; inline;
procedure ReturnToPointer(constref NewPointer: TRopePointer); inline;
function GetCurrentAsUTF8(): TUTF8Sequence; inline;
end;
operator = (constref Op1, Op2: TRopePointer): Boolean;
operator < (constref Op1, Op2: TRopePointer): Boolean;
operator <= (constref Op1, Op2: TRopePointer): Boolean;
operator = (constref Op1, Op2: Rope): Boolean;
{$IFDEF VERBOSE} var DebugNow: Boolean = False; {$ENDIF}
implementation
uses
exceptions, sysutils {$IFOPT C+}, rtlutils {$ENDIF};
function Max(const Value1, Value2: Cardinal): Cardinal; inline;
begin
if (Value1 > Value2) then
Result := Value1
else
Result := Value2;
end;
function Max(const Value1, Value2, Value3: Cardinal): Cardinal; inline;
begin
if (Value1 > Value2) then
begin
if (Value1 > Value3) then
Result := Value1 // 1 > 3, 2
else
Result := Value3; // 3 > 1 > 2
end
else
begin
if (Value2 > Value3) then
Result := Value2 // 2 > 3, 1
else
Result := Value3; // 3 > 2 > 1
end;
end;
function RopeInternals.Serialise(const FirstFragment: PRopeFragment): UTF8String;
var
NeededLength, Offset, Index: Cardinal;
CurrentFragment: RopeInternals.PRopeFragment;
Scratch: TUTF8Sequence;
begin
Assert(Assigned(FirstFragment));
NeededLength := 0;
CurrentFragment := FirstFragment;
repeat
case CurrentFragment^.Kind of
rfUTF8Buffer: Inc(NeededLength, CurrentFragment^.BufferLength);
rfUTF8Inline: Inc(NeededLength, CurrentFragment^.InlineLength);
rfCodepoints:
begin
Assert(CurrentFragment^.CodepointsLength > 0);
for Index := 0 to CurrentFragment^.CodepointsLength-1 do // $R-
Inc(NeededLength, CodepointToUTF8Length(CurrentFragment^.CodepointsValue[Index]));
end;
else
Assert(False);
end;
Assert(CurrentFragment <> CurrentFragment^.Next);
CurrentFragment := CurrentFragment^.Next;
until not Assigned(CurrentFragment);
SetLength(Result, NeededLength);
Offset := 1;
CurrentFragment := FirstFragment;
repeat
case CurrentFragment^.Kind of
rfUTF8Buffer:
begin
{$IFOPT C+}
try
{$ENDIF}
Move(CurrentFragment^.BufferValue^, Result[Offset], CurrentFragment^.BufferLength);
{$IFOPT C+}
except
ReportCurrentException();
FillChar(Result[Offset], CurrentFragment^.BufferLength, '%');
end;
{$ENDIF}
Inc(Offset, CurrentFragment^.BufferLength);
end;
rfUTF8Inline:
begin
Move(CurrentFragment^.InlineValue[0], Result[Offset], CurrentFragment^.InlineLength);
Inc(Offset, CurrentFragment^.InlineLength);
end;
rfCodepoints:
for Index := 0 to CurrentFragment^.CodepointsLength-1 do // $R-
begin
Scratch := CodepointToUTF8(CurrentFragment^.CodepointsValue[Index]);
Move(Scratch.Start, Result[Offset], Scratch.Length);
Inc(Offset, Scratch.Length);
end;
else
Assert(False);
end;
Assert(CurrentFragment <> CurrentFragment^.Next);
CurrentFragment := CurrentFragment^.Next;
until not Assigned(CurrentFragment);
Assert(Offset = Length(Result)+1);
end;
{$IFOPT C+}
function TRopePointer.IsZeroWidth(): Boolean;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: IsZeroWidth() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer: Result := FPosition.BufferCodepointLength = 0;
rfUTF8Inline: Result := FPosition.InlineCodepointLength = 0;
rfCodepoints: Result := not FPosition.CodepointsIndexIncluded;
else
Assert(False);
end;
if (FCurrentCharacter.Value >= 0) then
Assert(not Result)
else
Assert(Result);
end;
{$ENDIF}
{$IFOPT C+}
function TRopePointer.IsEOF(): Boolean;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: IsEOF() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
if (not Assigned(FPosition.CurrentFragment)) then
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: not Assigned(FPosition.CurrentFragment)', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
Result := True;
end
else
if (Assigned(FPosition.CurrentFragment^.Next)) then
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Assigned(FPosition.CurrentFragment^.Next) on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
Result := False;
end
else
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: not Assigned(FPosition.CurrentFragment^.Next) on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: FPosition.CurrentFragment^.Kind = ', FPosition.CurrentFragment^.Kind); {$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer: Result := (FPosition.BufferCodepointLength = 0) and (FPosition.BufferIndex = FPosition.CurrentFragment^.BufferLength);
rfUTF8Inline: Result := (FPosition.InlineCodepointLength = 0) and (FPosition.InlineIndex = FPosition.CurrentFragment^.InlineLength);
rfCodepoints: Result := (not FPosition.CodepointsIndexIncluded) and (FPosition.CodepointsIndex = FPosition.CurrentFragment^.CodepointsLength);
else
Assert(False);
end;
end;
{$IFOPT C+}
if (Result) then // {BOGUS Warning: Function result variable does not seem to initialized}
Assert((FCurrentCharacter = kEOF) or (FCurrentCharacter = kNone), 'expected EOF (or none) but had ' + FCurrentCharacter.GetDebugDescription())
else
Assert(FCurrentCharacter <> kEOF);
{$ENDIF}
end;
{$ENDIF}
{$IFOPT C+}
procedure TRopePointer.AssertIdentity(const Data: PRope);
begin
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
Assert(Data = FRope);
end;
{$ENDIF}
procedure TRopePointer.AdvanceToAfter();
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: AdvanceToAfter() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
{$IFOPT C+} Assert(not IsZeroWidth()); {$ENDIF}
{$IFOPT C+} Assert(not IsEOF()); {$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer:
begin
Inc(FPosition.BufferIndex, FPosition.BufferCodepointLength);
FPosition.BufferCodepointLength := 0;
end;
rfUTF8Inline:
begin
Inc(FPosition.InlineIndex, FPosition.InlineCodepointLength);
FPosition.InlineCodepointLength := 0;
end;
rfCodepoints:
begin
Inc(FPosition.CodepointsIndex);
FPosition.CodepointsIndexIncluded := False;
end;
else
Assert(False);
end;
{$IFOPT C+} FCurrentCharacter := kNone; {$ENDIF}
end;
procedure TRopePointer.ReadCurrent();
var
LocalBuffer: array[0..4] of Byte;
NewLength: TUTF8SequenceLength;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: ReadCurrent() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+}
Assert(Assigned(FRope));
Assert(not IsEOF());
{$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer:
begin
case (FPosition.CurrentFragment^.BufferLength-FPosition.BufferIndex) of
0: begin
Assert(False);
end;
1: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], NewLength);
end;
2: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+1)^;
LocalBuffer[2] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], NewLength);
end;
3: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+1)^;
LocalBuffer[2] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+2)^;
LocalBuffer[3] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], NewLength);
end;
else
begin
FCurrentCharacter := UTF8ToCodepoint(FPosition.CurrentFragment^.BufferValue + FPosition.BufferIndex, NewLength);
end;
end;
Assert(NewLength = FPosition.BufferCodepointLength);
end;
rfUTF8Inline:
begin
Assert(FPosition.InlineIndex < FPosition.CurrentFragment^.InlineLength);
FCurrentCharacter := UTF8ToCodepoint(@FPosition.CurrentFragment^.InlineValue[FPosition.InlineIndex], NewLength);
Assert(NewLength = FPosition.InlineCodepointLength);
end;
rfCodepoints:
begin
Assert(FPosition.CodepointsIndex < FPosition.CurrentFragment^.CodepointsLength);
FCurrentCharacter := FPosition.CurrentFragment^.CodepointsValue[FPosition.CodepointsIndex];
end;
else
Assert(False);
end;
end;
procedure TRopePointer.AdvanceToNext();
var
LocalBuffer: array[0..4] of Byte;
procedure MoveToNext();
var
Before, After: PtrUInt;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' AdvanceToNext.MoveToNext() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
// this is called if we've exhausted the current fragment
if (Assigned(FPosition.CurrentFragment^.Next)) then
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.CurrentFragment @', IntToHex(PtrUInt(FPosition.CurrentFragment), 16), ' and is ', FPosition.CurrentFragment^.Kind, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.CurrentFragment^.Next @', IntToHex(PtrUInt(FPosition.CurrentFragment^.Next), 16), ' and is ', FPosition.CurrentFragment^.Next^.Kind, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
//Before := PtrUInt(FPosition.CurrentFragment);
Assert(FPosition.CurrentFragment <> FPosition.CurrentFragment^.Next);
FPosition.CurrentFragment := FPosition.CurrentFragment^.Next;
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.CurrentFragment is now @', IntToHex(PtrUInt(FPosition.CurrentFragment), 16), ' and is ', FPosition.CurrentFragment^.Kind, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
//Assert(Before <> PtrUInt(FPosition.CurrentFragment));
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer:
begin
FPosition.BufferIndex := 0;
Assert(FPosition.CurrentFragment^.BufferLength > 0);
case (FPosition.CurrentFragment^.BufferLength) of
1: begin
LocalBuffer[0] := FPosition.CurrentFragment^.BufferValue^;
LocalBuffer[1] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], FPosition.BufferCodepointLength);
end;
2: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+1)^;
LocalBuffer[2] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], FPosition.BufferCodepointLength);
end;
3: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+1)^;
LocalBuffer[2] := (FPosition.CurrentFragment^.BufferValue+2)^;
LocalBuffer[3] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], FPosition.BufferCodepointLength);
end;
else
FCurrentCharacter := UTF8ToCodepoint(FPosition.CurrentFragment^.BufferValue, FPosition.BufferCodepointLength);
end;
Assert(FPosition.BufferIndex <= FPosition.CurrentFragment^.BufferLength); // should not go over what we have...
end;
rfUTF8Inline:
begin
FPosition.InlineIndex := 0;
Assert(FPosition.CurrentFragment^.InlineLength > 0);
FCurrentCharacter := UTF8ToCodepoint(@FPosition.CurrentFragment^.InlineValue[0], FPosition.InlineCodepointLength);
Assert(FPosition.InlineIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.InlineLength);
end;
rfCodepoints:
begin
FPosition.CodepointsIndex := 0;
Assert(FPosition.CurrentFragment^.CodepointsLength > 0);
FCurrentCharacter := FPosition.CurrentFragment^.CodepointsValue[0];
FPosition.CodepointsIndexIncluded := True;
end;
else
begin
Assert(False);
{$IFOPT C+} FCurrentCharacter := kNone; {$ENDIF}
end;
end;
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' new fragment is @', IntToHex(PtrUInt(FPosition.CurrentFragment), 16), ' and is ', FPosition.CurrentFragment^.Kind, '; FCurrentCharacter is U+', IntToHex(FCurrentCharacter.Value, 5), ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
end
else
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' reached end of rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
FCurrentCharacter := kEOF;
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer: FPosition.BufferCodepointLength := 0;
rfUTF8Inline: FPosition.InlineCodepointLength := 0;
rfCodepoints: FPosition.CodepointsIndexIncluded := False;
else
Assert(False);
end;
end;
end;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: AdvanceToNext() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' current fragment @', IntToHex(PtrUInt(FPosition.CurrentFragment), 16), ' is ', FPosition.CurrentFragment^.Kind, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer:
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' current fragment is rfUTF8Buffer (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.BufferCodepointLength = ', FPosition.BufferCodepointLength, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
if (FPosition.BufferCodepointLength > 0) then
Inc(FPosition.BufferIndex, FPosition.BufferCodepointLength);
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.BufferIndex (post inc) = ', FPosition.BufferIndex, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
Assert(FPosition.BufferIndex <= FPosition.CurrentFragment^.BufferLength); // UTF-8 can't span boundaries, so we can't have advanced past the boundary
case (FPosition.CurrentFragment^.BufferLength-FPosition.BufferIndex) of
0: begin
MoveToNext();
end;
1: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], FPosition.BufferCodepointLength);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
2: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+1)^;
LocalBuffer[2] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], FPosition.BufferCodepointLength);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
3: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+1)^;
LocalBuffer[2] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+2)^;
LocalBuffer[3] := 0;
FCurrentCharacter := UTF8ToCodepoint(@LocalBuffer[0], FPosition.BufferCodepointLength);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
else
begin
FCurrentCharacter := UTF8ToCodepoint(FPosition.CurrentFragment^.BufferValue + FPosition.BufferIndex, FPosition.BufferCodepointLength);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
end;
end;
rfUTF8Inline:
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' current fragment is rfUTF8Inline (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.InlineCodepointLength = ', FPosition.InlineCodepointLength, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
if (FPosition.InlineCodepointLength > 0) then
Inc(FPosition.InlineIndex, FPosition.InlineCodepointLength);
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.InlineIndex (post inc) = ', FPosition.InlineIndex, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
Assert(FPosition.InlineIndex <= FPosition.CurrentFragment^.InlineLength); // UTF-8 can't span boundaries, so we can't have advanced past the boundary
if (FPosition.InlineIndex = FPosition.CurrentFragment^.InlineLength) then
begin
MoveToNext();
end
else
begin
FCurrentCharacter := UTF8ToCodepoint(@FPosition.CurrentFragment^.InlineValue[FPosition.InlineIndex], FPosition.InlineCodepointLength);
Assert(FPosition.InlineIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.InlineLength); // should still not be more than we have...
end;
end;
rfCodepoints:
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' current fragment is rfCodepoints (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.CodepointsIndexIncluded = ', FPosition.CodepointsIndexIncluded, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
if (FPosition.CodepointsIndexIncluded) then
Inc(FPosition.CodepointsIndex);
{$IFDEF VERBOSE} if (DebugNow) then Writeln(' FPosition.CodepointsIndex (post inc) = ', FPosition.CodepointsIndex, ' (rope pointer now @', IntToHex(PtrUInt(@Self), 16), ')'); {$ENDIF}
Assert(FPosition.CodepointsIndex <= FPosition.CurrentFragment^.CodepointsLength);
if (FPosition.CodepointsIndex = FPosition.CurrentFragment^.CodepointsLength) then
begin
MoveToNext()
end
else
begin
FCurrentCharacter := FPosition.CurrentFragment^.CodepointsValue[FPosition.CodepointsIndex];
FPosition.CodepointsIndexIncluded := True;
end;
end;
else
Assert(False);
end;
end;
procedure TRopePointer.AdvanceToNextFaster();
var
LocalBuffer: array[0..4] of Byte;
procedure MoveToNext();
begin
// this is called if we've exhausted the current fragment
if (Assigned(FPosition.CurrentFragment^.Next)) then
begin
Assert(FPosition.CurrentFragment <> FPosition.CurrentFragment^.Next);
FPosition.CurrentFragment := FPosition.CurrentFragment^.Next;
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer:
begin
FPosition.BufferIndex := 0;
Assert(FPosition.CurrentFragment^.BufferLength > 0);
case (FPosition.CurrentFragment^.BufferLength) of
1: begin
LocalBuffer[0] := FPosition.CurrentFragment^.BufferValue^;
LocalBuffer[1] := 0;
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@LocalBuffer[0]);
end;
2: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+1)^;
LocalBuffer[2] := 0;
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@LocalBuffer[0]);
end;
3: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+1)^;
LocalBuffer[2] := (FPosition.CurrentFragment^.BufferValue+2)^;
LocalBuffer[3] := 0;
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@LocalBuffer[0]);
end;
else
FPosition.BufferCodepointLength := UTF8ToUTF8Length(FPosition.CurrentFragment^.BufferValue);
end;
Assert(FPosition.BufferIndex <= FPosition.CurrentFragment^.BufferLength); // should not go over what we have...
end;
rfUTF8Inline:
begin
FPosition.InlineIndex := 0;
Assert(FPosition.CurrentFragment^.InlineLength > 0);
FPosition.InlineCodepointLength := UTF8ToUTF8Length(@FPosition.CurrentFragment^.InlineValue[0]);
Assert(FPosition.InlineIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.InlineLength);
end;
rfCodepoints:
begin
FPosition.CodepointsIndex := 0;
Assert(FPosition.CurrentFragment^.CodepointsLength > 0);
FPosition.CodepointsIndexIncluded := True;
end;
else
begin
Assert(False);
end;
end;
end
else
begin
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer: FPosition.BufferCodepointLength := 0;
rfUTF8Inline: FPosition.InlineCodepointLength := 0;
rfCodepoints: FPosition.CodepointsIndexIncluded := False;
else
Assert(False);
end;
end;
end;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: AdvanceToNextFaster() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer:
begin
if (FPosition.BufferCodepointLength > 0) then
Inc(FPosition.BufferIndex, FPosition.BufferCodepointLength);
Assert(FPosition.BufferIndex <= FPosition.CurrentFragment^.BufferLength); // UTF-8 can't span boundaries, so we can't have advanced past the boundary
case (FPosition.CurrentFragment^.BufferLength-FPosition.BufferIndex) of
0: begin
MoveToNext();
end;
1: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := 0;
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@LocalBuffer[0]);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
2: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+1)^;
LocalBuffer[2] := 0;
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@LocalBuffer[0]);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
3: begin
LocalBuffer[0] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex)^;
LocalBuffer[1] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+1)^;
LocalBuffer[2] := (FPosition.CurrentFragment^.BufferValue+FPosition.BufferIndex+2)^;
LocalBuffer[3] := 0;
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@LocalBuffer[0]);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
else
begin
FPosition.BufferCodepointLength := UTF8ToUTF8Length(FPosition.CurrentFragment^.BufferValue + FPosition.BufferIndex);
Assert(FPosition.BufferIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.BufferLength); // should still not be more than we have...
end;
end;
end;
rfUTF8Inline:
begin
if (FPosition.InlineCodepointLength > 0) then
Inc(FPosition.InlineIndex, FPosition.InlineCodepointLength);
Assert(FPosition.InlineIndex <= FPosition.CurrentFragment^.InlineLength); // UTF-8 can't span boundaries, so we can't have advanced past the boundary
if (FPosition.InlineIndex = FPosition.CurrentFragment^.InlineLength) then
begin
MoveToNext();
end
else
begin
FPosition.BufferCodepointLength := UTF8ToUTF8Length(@FPosition.CurrentFragment^.InlineValue[FPosition.InlineIndex]);
Assert(FPosition.InlineIndex+FPosition.BufferCodepointLength <= FPosition.CurrentFragment^.InlineLength); // should still not be more than we have...
end;
end;
rfCodepoints:
begin
if (FPosition.CodepointsIndexIncluded) then
Inc(FPosition.CodepointsIndex);
Assert(FPosition.CodepointsIndex <= FPosition.CurrentFragment^.CodepointsLength);
if (FPosition.CodepointsIndex = FPosition.CurrentFragment^.CodepointsLength) then
begin
MoveToNext()
end
else
begin
FPosition.CodepointsIndexIncluded := True;
end;
end;
else
Assert(False);
end;
{$IFOPT C+} FCurrentCharacter := kNone; {$ENDIF}
end;
procedure TRopePointer.SetToZeroWidth();
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: SetToZeroWidth() on rope pointer @', IntToHex(PtrUInt(@Self), 16)); {$ENDIF}
{$IFOPT C+} Assert(Assigned(FRope)); {$ENDIF}
{$IFOPT C+} Assert(not IsZeroWidth()); {$ENDIF}
{$IFOPT C+} Assert(not IsEOF()); {$ENDIF}
case (FPosition.CurrentFragment^.Kind) of
rfUTF8Buffer: FPosition.BufferCodepointLength := 0;
rfUTF8Inline: FPosition.InlineCodepointLength := 0;
rfCodepoints: FPosition.CodepointsIndexIncluded := False;
else
Assert(False);
end;
{$IFOPT C+} FCurrentCharacter := kNone; {$ENDIF}
end;
function CutRope.GetIsEmpty(): Boolean;
begin
Result := Length(FValue) = 0;
end;
function CutRope.GetAsString(): UTF8String;
begin
{$IFOPT C+} Assert(not FRead); {$ENDIF}
if (Length(FValue) = 0) then
begin
Result := '';
exit;
end;
Result := RopeInternals.Serialise(@FValue[0]);
{$IFOPT C+} FRead := True; {$ENDIF}
end;
function CutRope.GetAsStringSlow(): UTF8String;
begin
if (Length(FValue) = 0) then
begin
Result := '';
exit;
end;
Result := RopeInternals.Serialise(@FValue[0]);
end;
class function CutRope.CreateFrom(const NewString: TUnicodeCodepointArray): CutRope;
var
Index: Cardinal;
begin
Assert(Length(NewString) <= RopeInternals.CodepointsSize);
Assert(Length(NewString) > 0);
SetLength(Result.FValue, 1);
Result.FValue[0].Kind := rfCodepoints;
for Index := Low(NewString) to High(NewString) do // $R-
Result.FValue[0].CodepointsValue[Index] := NewString[Index];
Result.FValue[0].CodepointsLength := Length(NewString); // $R-
Result.FValue[0].Next := nil;
{$IFOPT C+} Result.FRead := False; {$ENDIF}
end;
class function CutRope.CreateFrom(const NewString: UTF8String): CutRope;
begin
Assert(NewString <> '');
{$IFOPT C+} AssertStringIsConstant(NewString); {$ENDIF}
SetLength(Result.FValue, 1);
Result.FValue[0].Kind := rfUTF8Buffer;
Result.FValue[0].BufferValue := PByte(NewString);
Result.FValue[0].BufferLength := Length(NewString); // $R-
Assert(not Assigned(Result.FValue[0].Next));
{$IFOPT C+} Result.FRead := False; {$ENDIF}
end;
procedure Rope.EnsureSize(const NeededBaseSlots: Cardinal = 1; const NeededSubslots: Cardinal = 1);
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: EnsureSize(', NeededBaseSlots, ', ', NeededSubslots, ') on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
Assert(NeededBaseSlots > 0);
Assert((NeededBaseSlots = 1) or (NeededSubslots = 0));
if (Length(FValue) = 0) then
begin
FLast := nil;
SetLength(FValue, Max(NeededBaseSlots, kMinBaseSlots));
if (NeededSubslots > 0) then
begin
Assert(Length(FValue) > 0);
SetLength(FValue[0], Max(NeededSubslots, kMinSubslots));
FFilledLength := 1;
end
else
FFilledLength := 0;
FLastArrayFilledLength := 0;
end
else
begin
Assert(NeededBaseSlots > 0);
Assert(FFilledLength > 0); // shouldn't ever end up here the second time if we haven't used a base slot
if ((NeededSubslots = 0) or ((NeededSubslots > 0) and (FLastArrayFilledLength >= Length(FValue[FFilledLength-1])))) then
begin
if (FFilledLength+NeededBaseSlots > Length(FValue)) then
begin
// XXX should handle overflows here
SetLength(FValue, Max(FFilledLength + NeededBaseSlots, Length(FValue) * 2)); // XXX // $R-
end;
if (NeededSubslots > 0) then
begin
SetLength(FValue[FFilledLength], Max(NeededSubslots, kMinSubslots));
Inc(FFilledLength);
FLastArrayFilledLength := 0;
end;
end;
end;
end;
function Rope.GetIsEmpty(): Boolean;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: GetIsEmpty() on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
Result := Length(FValue) = 0;
{$IFOPT C+}
Assert(Result = not Assigned(FLast));
{$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Result = ', Result); {$ENDIF}
end;
function Rope.GetAsString(): UTF8String;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: GetAsString() on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
if (Length(FValue) = 0) then
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Empty Rope'); {$ENDIF}
Result := '';
exit;
end;
Assert(FFilledLength > 0);
Assert(Length(FValue) >= FFilledLength);
Assert(Length(FValue) > 0);
Assert(Length(FValue[0]) > 0);
Assert(Assigned(FLast));
Result := RopeInternals.Serialise(@FValue[0][0]);
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Result = "', Result, '"'); {$ENDIF}
end;
{$IFOPT C+}
procedure Rope.AssertInit();
begin
Assert(Length(FValue) = 0, 'Somehow this Rope has a value with length ' + IntToStr(Length(FValue)));
Assert(not Assigned(FLast));
end;
{$ENDIF}
procedure Rope.AppendDestructively(var NewString: CutRope);
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: AppendDestructively(CutRope) on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
if (Length(NewString.FValue) > 0) then
begin
EnsureSize(1, 0);
Assert(FFilledLength < Length(FValue));
FValue[FFilledLength] := NewString.FValue;
{$IFOPT C+} NewString.FValue := nil; {$ENDIF}
if (Assigned(FLast)) then
begin
FLast^.Next := @FValue[FFilledLength][0];
Assert(FLast^.Next <> FLast);
end;
FLastArrayFilledLength := Length(FValue[FFilledLength]); // $R-
FLast := @FValue[FFilledLength][FLastArrayFilledLength-1];
Inc(FFilledLength);
Assert(not Assigned(FLast^.Next));
end;
end;
procedure Rope.AppendDestructively(var NewString: Rope);
var
Index: Cardinal;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: AppendDestructively(Rope) on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
if (Length(NewString.FValue) > 0) then
begin
Assert(NewString.FFilledLength > 0);
Assert(NewString.FFilledLength <= Length(NewString.FValue));
if (Length(FValue) = 0) then
begin
FValue := NewString.FValue;
FFilledLength := NewString.FFilledLength;
end
else
begin
Assert(Assigned(FLast));
if (FFilledLength+NewString.FFilledLength < Length(FValue)) then
EnsureSize(NewString.FFilledLength, 0);
Assert(FFilledLength + NewString.FFilledLength <= Length(FValue));
for Index := 0 to NewString.FFilledLength-1 do // $R-
FValue[FFilledLength+Index] := NewString.FValue[Index];
FLast^.Next := @FValue[FFilledLength][0];
Assert(FLast^.Next <> FLast);
Inc(FFilledLength, NewString.FFilledLength);
Assert(NewString.FLast = @FValue[FFilledLength-1][High(FValue[FFilledLength-1])]);
end;
FLastArrayFilledLength := NewString.FLastArrayFilledLength;
FLast := NewString.FLast;
Assert(not Assigned(FLast^.Next));
{$IFOPT C+}
NewString.FValue := nil;
NewString.FFilledLength := 0;
NewString.FLastArrayFilledLength := 0;
NewString.FLast := nil;
{$ENDIF}
end;
end;
procedure Rope.Append(const NewString: PUTF8String);
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Append(PUTF8String) on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
Assert(Assigned(NewString));
Assert(NewString^ <> '');
EnsureSize(1, 1);
Assert(FFilledLength > 0);
Assert(FLastArrayFilledLength < Length(FValue[FFilledLength-1]));
FValue[FFilledLength-1][FLastArrayFilledLength].Kind := rfUTF8Buffer;
FValue[FFilledLength-1][FLastArrayFilledLength].BufferValue := PByte(NewString^);
FValue[FFilledLength-1][FLastArrayFilledLength].BufferLength := Length(NewString^); // $R-
if (Assigned(FLast)) then
begin
FLast^.Next := @FValue[FFilledLength-1][FLastArrayFilledLength];
Assert(FLast^.Next <> FLast);
end;
FLast := @FValue[FFilledLength-1][FLastArrayFilledLength];
Inc(FLastArrayFilledLength);
end;
procedure Rope.Append(const NewString: RopeInternals.TInlineString);
var
Index: Cardinal;
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Append(ShortString) on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Length(FValue)=', Length(FValue)); {$ENDIF}
Assert(Length(NewString) <= RopeInternals.UTF8InlineSize, 'Maximum size of short string is ' + IntToStr(RopeInternals.UTF8InlineSize));
if ((not Assigned(FLast)) or (FLast^.Kind <> rfUTF8Inline) or (RopeInternals.UTF8InlineSize - FLast^.InlineLength < Length(NewString))) then
begin
EnsureSize(1, 1);
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now Length(FValue)=', Length(FValue)); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now FFilledLength=', FFilledLength); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now Length(FValue[FFilledLength-1])=', Length(FValue[FFilledLength-1])); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now FLastArrayFilledLength=', FLastArrayFilledLength); {$ENDIF}
Assert(FFilledLength > 0);
Assert(FLastArrayFilledLength < Length(FValue[FFilledLength-1]));
if (Assigned(FLast)) then
begin
FLast^.Next := @FValue[FFilledLength-1][FLastArrayFilledLength];
Assert(FLast^.Next <> FLast);
end;
FLast := @FValue[FFilledLength-1][FLastArrayFilledLength];
FLast^.Kind := rfUTF8Inline;
FLast^.InlineLength := 0;
Inc(FLastArrayFilledLength);
end;
for Index := 1 to Length(NewString) do
FLast^.InlineValue[FLast^.InlineLength+Index-1] := Byte(NewString[Index]);
Inc(FLast^.InlineLength, Length(NewString));
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: content is now: "' + AsString + '"'); {$ENDIF}
end;
procedure Rope.Append(const NewString: TUnicodeCodepoint);
begin
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Append(TUnicodeCodepoint) on rope @', IntToHex(PtrUInt(@Self), 16), ' with data @', IntToHex(PtrUInt(FValue), 16)); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: Length(FValue)=', Length(FValue)); {$ENDIF}
EnsureSize(1, 1);
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now Length(FValue)=', Length(FValue)); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now FFilledLength=', FFilledLength); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now Length(FValue[FFilledLength-1])=', Length(FValue[FFilledLength-1])); {$ENDIF}
{$IFDEF VERBOSE} if (DebugNow) then Writeln('Ropes: now FLastArrayFilledLength=', FLastArrayFilledLength); {$ENDIF}
Assert(FFilledLength > 0);