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ec29a31834
fpc/rtl/inc/objects.pp
daniel ec29a31834 * copyright 2000
2000-01-07 16:41:28 +00:00

2841 lines
133 KiB
ObjectPascal
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{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by the Free Pascal development team.
Objects.pas clone for Free Pascal
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
{************[ SOURCE FILE OF FREE VISION ]****************}
{ }
{ System independent clone of objects.pas }
{ }
{ Interface Copyright (c) 1992 Borland International }
{ }
{ Parts Copyright (c) 1999-2000 by Florian Klaempfl }
{ fnklaemp@cip.ft.uni-erlangen.de }
{ }
{ Parts Copyright (c) 1999-2000 by Frank ZAGO }
{ zago@ecoledoc.ipc.fr }
{ }
{ Parts Copyright (c) 1999-2000 by MH Spiegel }
{ }
{ Parts Copyright (c) 1996, 1999-2000 by Leon de Boer }
{ ldeboer@ibm.net }
{ }
{ Free Vision project coordinator Balazs Scheidler }
{ bazsi@tas.vein.hu }
{ }
UNIT Objects;
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
INTERFACE
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
{==== Select assembler ==============================================}
{$IFDEF CPU86}
{$ASMMODE ATT}
{$ENDIF}
{$IFDEF CPU68}
{$ASMMODE MOT}
{$ENDIF}
{==== Compiler directives ===========================================}
{$H-} { No ansistrings }
{$E+} { Emulation is on }
{$X+} { Extended syntax is ok }
{$R-} { Disable range checking }
{$ifndef Linux}
{$S-} { Disable Stack Checking }
{$endif}
{$I-} { Disable IO Checking }
{$Q-} { Disable Overflow Checking }
{$V-} { Turn off strict VAR strings }
{====================================================================}
{***************************************************************************}
{ PUBLIC CONSTANTS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ STREAM ERROR STATE MASKS }
{---------------------------------------------------------------------------}
CONST
stOk = 0; { No stream error }
stError = -1; { Access error }
stInitError = -2; { Initialize error }
stReadError = -3; { Stream read error }
stWriteError = -4; { Stream write error }
stGetError = -5; { Get object error }
stPutError = -6; { Put object error }
stSeekError = -7; { Seek error in stream }
stOpenError = -8; { Error opening stream }
{---------------------------------------------------------------------------}
{ STREAM ACCESS MODE CONSTANTS }
{---------------------------------------------------------------------------}
CONST
stCreate = $3C00; { Create new file }
stOpenRead = $3D00; { Read access only }
stOpenWrite = $3D01; { Write access only }
stOpen = $3D02; { Read/write access }
{---------------------------------------------------------------------------}
{ TCollection ERROR CODES }
{---------------------------------------------------------------------------}
CONST
coIndexError = -1; { Index out of range }
coOverflow = -2; { Overflow }
{---------------------------------------------------------------------------}
{ VMT HEADER CONSTANT - HOPEFULLY WE CAN DROP THIS LATER }
{---------------------------------------------------------------------------}
CONST
vmtHeaderSize = 8; { VMT header size }
CONST
{---------------------------------------------------------------------------}
{ MAXIUM DATA SIZES }
{---------------------------------------------------------------------------}
{$IFDEF FPC}
MaxBytes = 128*1024*1024; { Maximum data size }
{$ELSE}
MaxBytes = 16384;
{$ENDIF}
MaxWords = MaxBytes DIV SizeOf(Word); { Max word data size }
MaxPtrs = MaxBytes DIV SizeOf(Pointer); { Max ptr data size }
MaxCollectionSize = MaxBytes DIV SizeOf(Pointer); { Max collection size }
MaxTPCompatibleCollectionSize = 65520 div 4;
{***************************************************************************}
{ PUBLIC TYPE DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ CHARACTER SET }
{---------------------------------------------------------------------------}
TYPE
TCharSet = SET Of Char; { Character set }
PCharSet = ^TCharSet; { Character set ptr }
{---------------------------------------------------------------------------}
{ GENERAL ARRAYS }
{---------------------------------------------------------------------------}
TYPE
TByteArray = ARRAY [0..MaxBytes-1] Of Byte; { Byte array }
PByteArray = ^TByteArray; { Byte array pointer }
TWordArray = ARRAY [0..MaxWords-1] Of Word; { Word array }
PWordArray = ^TWordArray; { Word array pointer }
TPointerArray = Array [0..MaxPtrs-1] Of Pointer; { Pointer array }
PPointerArray = ^TPointerArray; { Pointer array ptr }
{---------------------------------------------------------------------------}
{ POINTER TO STRING }
{---------------------------------------------------------------------------}
TYPE
PString = ^String; { String pointer }
{---------------------------------------------------------------------------}
{ OS dependent File type / consts }
{---------------------------------------------------------------------------}
{$IFDEF GO32V1}
type
FNameStr = String[79];
THandle = Integer;
const
MaxReadBytes = $fffe;
invalidhandle = -1;
{$ENDIF}
{$IFDEF GO32V2}
type
FNameStr = String;
THandle = Integer;
const
MaxReadBytes = $fffe;
invalidhandle = -1;
{$ENDIF}
{$IFDEF Win32}
type
FNameStr = String;
THandle = Longint;
const
MaxReadBytes = $fffe;
invalidhandle = -1;
{$ENDIF}
{$IFDEF OS2}
type
FNameStr = String;
THandle = Word;
const
MaxReadBytes = $7fffffff;
invalidhandle = $ffff;
{$ENDIF}
{$IFDEF LINUX}
type
FNameStr = String;
{ values are words, though the OS calls return 32-bit values }
{ to check (CEC) }
THandle = Longint;
const
MaxReadBytes = $7fffffff;
invalidhandle = -1;
{$ENDIF}
{$IFDEF AMIGA}
type
FNameStr = String;
THandle = Longint;
const
MaxReadBytes = $fffe;
invalidhandle = -1;
{$ENDIF}
{$IFDEF ATARI}
type
FNameStr = String[79];
THandle = Integer;
const
MaxReadBytes = $fffe;
invalidhandle = -1;
{$ENDIF}
{$IFDEF MAC}
type
FNameStr = String;
THandle = Integer;
const
MaxReadBytes = $fffe;
invalidhandle = -1;
{$ENDIF}
{---------------------------------------------------------------------------}
{ DOS ASCIIZ FILENAME }
{---------------------------------------------------------------------------}
TYPE
AsciiZ = Array [0..255] Of Char; { Filename array }
{---------------------------------------------------------------------------}
{ BIT SWITCHED TYPE CONSTANTS }
{---------------------------------------------------------------------------}
TYPE
Sw_Word = Cardinal; { Long Word now }
Sw_Integer = LongInt; { Long integer now }
{***************************************************************************}
{ PUBLIC RECORD DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TYPE CONVERSION RECORDS }
{---------------------------------------------------------------------------}
TYPE
WordRec = packed RECORD
Lo, Hi: Byte; { Word to bytes }
END;
LongRec = packed RECORD
Lo, Hi: Word; { LongInt to words }
END;
PtrRec = packed RECORD
Ofs, Seg: Word; { Pointer to words }
END;
{---------------------------------------------------------------------------}
{ TStreamRec RECORD - STREAM OBJECT RECORD }
{---------------------------------------------------------------------------}
TYPE
PStreamRec = ^TStreamRec; { Stream record ptr }
TStreamRec = Packed RECORD
ObjType: Sw_Word; { Object type id }
VmtLink: pointer; { VMT link }
Load : Pointer; { Object load code }
Store: Pointer; { Object store code }
Next : PStreamRec; { Next stream record }
END;
{***************************************************************************}
{ PUBLIC OBJECT DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TPoint OBJECT - POINT OBJECT }
{---------------------------------------------------------------------------}
TYPE
PPoint = ^TPoint;
TPoint = OBJECT
X, Y: Sw_Integer;
END;
{---------------------------------------------------------------------------}
{ TRect OBJECT - RECTANGLE OBJECT }
{---------------------------------------------------------------------------}
PRect = ^TRect;
TRect = OBJECT
A, B: TPoint; { Corner points }
FUNCTION Empty: Boolean;
FUNCTION Equals (R: TRect): Boolean;
FUNCTION Contains (P: TPoint): Boolean;
PROCEDURE Copy (R: TRect);
PROCEDURE Union (R: TRect);
PROCEDURE Intersect (R: TRect);
PROCEDURE Move (ADX, ADY: Sw_Integer);
PROCEDURE Grow (ADX, ADY: Sw_Integer);
PROCEDURE Assign (XA, YA, XB, YB: Sw_Integer);
END;
{---------------------------------------------------------------------------}
{ TObject OBJECT - BASE ANCESTOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TObject = OBJECT
CONSTRUCTOR Init;
PROCEDURE Free;
DESTRUCTOR Done; Virtual;
END;
PObject = ^TObject;
{ ******************************* REMARK ****************************** }
{ Two new virtual methods have been added to the object in the form of }
{ Close and Open. The main use here is in the Disk Based Descendants }
{ the calls open and close the given file so these objects can be }
{ used like standard files. Two new fields have also been added to }
{ speed up seeks on descendants. All existing code will compile and }
{ work completely normally oblivious to these new methods and fields. }
{ ****************************** END REMARK *** Leon de Boer, 15May96 * }
{---------------------------------------------------------------------------}
{ TStream OBJECT - STREAM ANCESTOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TStream = OBJECT (TObject)
Status : Integer; { Stream status }
ErrorInfo : Integer; { Stream error info }
StreamSize: LongInt; { Stream current size }
Position : LongInt; { Current position }
TPCompatible : Boolean;
CONSTRUCTOR Init;
FUNCTION Get: PObject;
FUNCTION StrRead: PChar;
FUNCTION GetPos: Longint; Virtual;
FUNCTION GetSize: Longint; Virtual;
FUNCTION ReadStr: PString;
PROCEDURE Open (OpenMode: Word); Virtual;
PROCEDURE Close; Virtual;
PROCEDURE Reset;
PROCEDURE Flush; Virtual;
PROCEDURE Truncate; Virtual;
PROCEDURE Put (P: PObject);
PROCEDURE StrWrite (P: PChar);
PROCEDURE WriteStr (P: PString);
PROCEDURE Seek (Pos: LongInt); Virtual;
PROCEDURE Error (Code, Info: Integer); Virtual;
PROCEDURE Read (Var Buf; Count: Sw_Word); Virtual;
PROCEDURE Write (Var Buf; Count: Sw_Word); Virtual;
PROCEDURE CopyFrom (Var S: TStream; Count: Longint);
END;
PStream = ^TStream;
{ ******************************* REMARK ****************************** }
{ A few minor changes to this object and an extra field added called }
{ FName which holds an AsciiZ array of the filename this allows the }
{ streams file to be opened and closed like a normal text file. All }
{ existing code should work without any changes. }
{ ****************************** END REMARK *** Leon de Boer, 19May96 * }
{---------------------------------------------------------------------------}
{ TDosStream OBJECT - DOS FILE STREAM OBJECT }
{---------------------------------------------------------------------------}
TYPE
TDosStream = OBJECT (TStream)
Handle: THandle; { DOS file handle }
FName : AsciiZ; { AsciiZ filename }
CONSTRUCTOR Init (FileName: FNameStr; Mode: Word);
DESTRUCTOR Done; Virtual;
PROCEDURE Close; Virtual;
PROCEDURE Truncate; Virtual;
PROCEDURE Seek (Pos: LongInt); Virtual;
PROCEDURE Open (OpenMode: Word); Virtual;
PROCEDURE Read (Var Buf; Count: Sw_Word); Virtual;
PROCEDURE Write (Var Buf; Count: Sw_Word); Virtual;
END;
PDosStream = ^TDosStream;
{ ******************************* REMARK ****************************** }
{ A few minor changes to this object and an extra field added called }
{ lastmode which holds the read or write condition last using the }
{ speed up buffer which helps speed up the flush, position and size }
{ functions. All existing code should work without any changes. }
{ ****************************** END REMARK *** Leon de Boer, 19May96 * }
{---------------------------------------------------------------------------}
{ TBufStream OBJECT - BUFFERED DOS FILE STREAM }
{---------------------------------------------------------------------------}
TYPE
TBufStream = OBJECT (TDosStream)
LastMode: Byte; { Last buffer mode }
BufSize : Sw_Word; { Buffer size }
BufPtr : Sw_Word; { Buffer start }
BufEnd : Sw_Word; { Buffer end }
Buffer : PByteArray; { Buffer allocated }
CONSTRUCTOR Init (FileName: FNameStr; Mode, Size: Word);
DESTRUCTOR Done; Virtual;
PROCEDURE Close; Virtual;
PROCEDURE Flush; Virtual;
PROCEDURE Truncate; Virtual;
PROCEDURE Seek (Pos: LongInt); Virtual;
PROCEDURE Open (OpenMode: Word); Virtual;
PROCEDURE Read (Var Buf; Count: Sw_Word); Virtual;
PROCEDURE Write (Var Buf; Count: Sw_Word); Virtual;
END;
PBufStream = ^TBufStream;
{ ******************************* REMARK ****************************** }
{ All the changes here should be completely transparent to existing }
{ code. Basically the memory blocks do not have to be base segments }
{ but this means our list becomes memory blocks rather than segments. }
{ The stream will also expand like the other standard streams!! }
{ ****************************** END REMARK *** Leon de Boer, 19May96 * }
{---------------------------------------------------------------------------}
{ TMemoryStream OBJECT - MEMORY STREAM OBJECT }
{---------------------------------------------------------------------------}
TYPE
TMemoryStream = OBJECT (TStream)
BlkCount: Sw_Word; { Number of segments }
BlkSize : Word; { Memory block size }
MemSize : LongInt; { Memory alloc size }
BlkList : PPointerArray; { Memory block list }
CONSTRUCTOR Init (ALimit: Longint; ABlockSize: Word);
DESTRUCTOR Done; Virtual;
PROCEDURE Truncate; Virtual;
PROCEDURE Read (Var Buf; Count: Sw_Word); Virtual;
PROCEDURE Write (Var Buf; Count: Sw_Word); Virtual;
PRIVATE
FUNCTION ChangeListSize (ALimit: Sw_Word): Boolean;
END;
PMemoryStream = ^TMemoryStream;
TYPE
TItemList = Array [0..MaxCollectionSize - 1] Of Pointer;
PItemList = ^TItemList;
{ ******************************* REMARK ****************************** }
{ The changes here look worse than they are. The Sw_Integer simply }
{ switches between Integers and LongInts if switched between 16 and 32 }
{ bit code. All existing code will compile without any changes. }
{ ****************************** END REMARK *** Leon de Boer, 10May96 * }
{---------------------------------------------------------------------------}
{ TCollection OBJECT - COLLECTION ANCESTOR OBJECT }
{---------------------------------------------------------------------------}
TCollection = OBJECT (TObject)
Items: PItemList; { Item list pointer }
Count: Sw_Integer; { Item count }
Limit: Sw_Integer; { Item limit count }
Delta: Sw_Integer; { Inc delta size }
CONSTRUCTOR Init (ALimit, ADelta: Sw_Integer);
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION At (Index: Sw_Integer): Pointer;
FUNCTION IndexOf (Item: Pointer): Sw_Integer; Virtual;
FUNCTION GetItem (Var S: TStream): Pointer; Virtual;
FUNCTION LastThat (Test: Pointer): Pointer;
FUNCTION FirstThat (Test: Pointer): Pointer;
PROCEDURE Pack;
PROCEDURE FreeAll;
PROCEDURE DeleteAll;
PROCEDURE Free (Item: Pointer);
PROCEDURE Insert (Item: Pointer); Virtual;
PROCEDURE Delete (Item: Pointer);
PROCEDURE AtFree (Index: Sw_Integer);
PROCEDURE FreeItem (Item: Pointer); Virtual;
PROCEDURE AtDelete (Index: Sw_Integer);
PROCEDURE ForEach (Action: Pointer);
PROCEDURE SetLimit (ALimit: Sw_Integer); Virtual;
PROCEDURE Error (Code, Info: Integer); Virtual;
PROCEDURE AtPut (Index: Sw_Integer; Item: Pointer);
PROCEDURE AtInsert (Index: Sw_Integer; Item: Pointer);
PROCEDURE Store (Var S: TStream);
PROCEDURE PutItem (Var S: TStream; Item: Pointer); Virtual;
END;
PCollection = ^TCollection;
{---------------------------------------------------------------------------}
{ TSortedCollection OBJECT - SORTED COLLECTION ANCESTOR }
{---------------------------------------------------------------------------}
TYPE
TSortedCollection = OBJECT (TCollection)
Duplicates: Boolean; { Duplicates flag }
CONSTRUCTOR Init (ALimit, ADelta: Sw_Integer);
CONSTRUCTOR Load (Var S: TStream);
FUNCTION KeyOf (Item: Pointer): Pointer; Virtual;
FUNCTION IndexOf (Item: Pointer): Sw_Integer; Virtual;
FUNCTION Compare (Key1, Key2: Pointer): Sw_Integer; Virtual;
FUNCTION Search (Key: Pointer; Var Index: Sw_Integer): Boolean;Virtual;
PROCEDURE Insert (Item: Pointer); Virtual;
PROCEDURE Store (Var S: TStream);
END;
PSortedCollection = ^TSortedCollection;
{---------------------------------------------------------------------------}
{ TStringCollection OBJECT - STRING COLLECTION OBJECT }
{---------------------------------------------------------------------------}
TYPE
TStringCollection = OBJECT (TSortedCollection)
FUNCTION GetItem (Var S: TStream): Pointer; Virtual;
FUNCTION Compare (Key1, Key2: Pointer): Sw_Integer; Virtual;
PROCEDURE FreeItem (Item: Pointer); Virtual;
PROCEDURE PutItem (Var S: TStream; Item: Pointer); Virtual;
END;
PStringCollection = ^TStringCollection;
{---------------------------------------------------------------------------}
{ TStrCollection OBJECT - STRING COLLECTION OBJECT }
{---------------------------------------------------------------------------}
TYPE
TStrCollection = OBJECT (TSortedCollection)
FUNCTION Compare (Key1, Key2: Pointer): Sw_Integer; Virtual;
FUNCTION GetItem (Var S: TStream): Pointer; Virtual;
PROCEDURE FreeItem (Item: Pointer); Virtual;
PROCEDURE PutItem (Var S: TStream; Item: Pointer); Virtual;
END;
PStrCollection = ^TStrCollection;
{ ******************************* REMARK ****************************** }
{ This is a completely >> NEW << object which holds a collection of }
{ strings but does not alphabetically sort them. It is a very useful }
{ object for insert ordered list boxes! }
{ ****************************** END REMARK *** Leon de Boer, 15May96 * }
{---------------------------------------------------------------------------}
{ TUnSortedStrCollection - UNSORTED STRING COLLECTION OBJECT }
{---------------------------------------------------------------------------}
TYPE
TUnSortedStrCollection = OBJECT (TStringCollection)
PROCEDURE Insert (Item: Pointer); Virtual;
END;
PUnSortedStrCollection = ^TUnSortedStrCollection;
{---------------------------------------------------------------------------}
{ TResourceCollection OBJECT - RESOURCE COLLECTION OBJECT }
{---------------------------------------------------------------------------}
TYPE
TResourceCollection = OBJECT (TStringCollection)
FUNCTION KeyOf (Item: Pointer): Pointer; Virtual;
FUNCTION GetItem (Var S: TStream): Pointer; Virtual;
PROCEDURE FreeItem (Item: Pointer); Virtual;
PROCEDURE PutItem (Var S: TStream; Item: Pointer); Virtual;
END;
PResourceCollection = ^TResourceCollection;
{---------------------------------------------------------------------------}
{ TResourceFile OBJECT - RESOURCE FILE OBJECT }
{---------------------------------------------------------------------------}
TYPE
TResourceFile = OBJECT (TObject)
Stream : PStream; { File as a stream }
Modified: Boolean; { Modified flag }
CONSTRUCTOR Init (AStream: PStream);
DESTRUCTOR Done; Virtual;
FUNCTION Count: Sw_Integer;
FUNCTION KeyAt (I: Sw_Integer): String;
FUNCTION Get (Key: String): PObject;
FUNCTION SwitchTo (AStream: PStream; Pack: Boolean): PStream;
PROCEDURE Flush;
PROCEDURE Delete (Key: String);
PROCEDURE Put (Item: PObject; Key: String);
PRIVATE
BasePos: LongInt; { Base position }
IndexPos: LongInt; { Index position }
Index: TResourceCollection; { Index collection }
END;
PResourceFile = ^TResourceFile;
TYPE
TStrIndexRec = Packed RECORD
Key, Count, Offset: Word;
END;
TStrIndex = Array [0..9999] Of TStrIndexRec;
PStrIndex = ^TStrIndex;
{---------------------------------------------------------------------------}
{ TStringList OBJECT - STRING LIST OBJECT }
{---------------------------------------------------------------------------}
TStringList = OBJECT (TObject)
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION Get (Key: Sw_Word): String;
PRIVATE
Stream : PStream;
BasePos : Longint;
IndexSize: Sw_Word;
Index : PStrIndex;
PROCEDURE ReadStr (Var S: String; Offset, Skip: Sw_Word);
END;
PStringList = ^TStringList;
{---------------------------------------------------------------------------}
{ TStrListMaker OBJECT - RESOURCE FILE OBJECT }
{---------------------------------------------------------------------------}
TYPE
TStrListMaker = OBJECT (TObject)
CONSTRUCTOR Init (AStrSize, AIndexSize: Sw_Word);
DESTRUCTOR Done; Virtual;
PROCEDURE Put (Key: Sw_Word; S: String);
PROCEDURE Store (Var S: TStream);
PRIVATE
StrPos : Sw_Word;
StrSize : Sw_Word;
Strings : PByteArray;
IndexPos : Sw_Word;
IndexSize: Sw_Word;
Index : PStrIndex;
Cur : TStrIndexRec;
PROCEDURE CloseCurrent;
END;
PStrListMaker = ^TStrListMaker;
{***************************************************************************}
{ INTERFACE ROUTINES }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ DYNAMIC STRING INTERFACE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-NewStr-------------------------------------------------------------
Allocates a dynamic string into memory. If S is nil, NewStr returns
a nil pointer, otherwise NewStr allocates Length(S)+1 bytes of memory
containing a copy of S, and returns a pointer to the string.
12Jun96 LdB
---------------------------------------------------------------------}
FUNCTION NewStr (Const S: String): PString;
{-DisposeStr---------------------------------------------------------
Disposes of a PString allocated by the function NewStr.
12Jun96 LdB
---------------------------------------------------------------------}
PROCEDURE DisposeStr (P: PString);
PROCEDURE SetStr(VAR p:pString; CONST s:STRING);
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ STREAM INTERFACE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-Abstract-----------------------------------------------------------
Terminates program with a run-time error 211. When implementing
an abstract object type, call Abstract in those virtual methods that
must be overridden in descendant types. This ensures that any
attempt to use instances of the abstract object type will fail.
12Jun96 LdB
---------------------------------------------------------------------}
PROCEDURE Abstract;
{-RegisterObjects----------------------------------------------------
Registers the three standard objects TCollection, TStringCollection
and TStrCollection.
02Sep97 LdB
---------------------------------------------------------------------}
PROCEDURE RegisterObjects;
{-RegisterType-------------------------------------------------------
Registers the given object type with Free Vision's streams, creating
a list of known objects. Streams can only store and return these known
object types. Each registered object needs a unique stream registration
record, of type TStreamRec.
02Sep97 LdB
---------------------------------------------------------------------}
PROCEDURE RegisterType (Var S: TStreamRec);
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ GENERAL FUNCTION INTERFACE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-LongMul------------------------------------------------------------
Returns the long integer value of X * Y integer values.
04Sep97 LdB
---------------------------------------------------------------------}
FUNCTION LongMul (X, Y: Integer): LongInt;
{-LongDiv------------------------------------------------------------
Returns the integer value of long integer X divided by integer Y.
04Sep97 LdB
---------------------------------------------------------------------}
FUNCTION LongDiv (X: Longint; Y: Integer): Integer;
{***************************************************************************}
{ PUBLIC INITIALIZED VARIABLES }
{***************************************************************************}
CONST
{---------------------------------------------------------------------------}
{ INITIALIZED DOS/DPMI/WIN/OS2 PUBLIC VARIABLES }
{---------------------------------------------------------------------------}
StreamError: Pointer = Nil; { Stream error ptr }
DosStreamError: Word = $0; { Dos stream error }
DefaultTPCompatible: Boolean = false;
{---------------------------------------------------------------------------}
{ STREAM REGISTRATION RECORDS }
{---------------------------------------------------------------------------}
CONST
RCollection: TStreamRec = (
ObjType: 50;
VmtLink: Ofs(TypeOf(TCollection)^);
Load: @TCollection.Load;
Store: @TCollection.Store);
RStringCollection: TStreamRec = (
ObjType: 51;
VmtLink: Ofs(TypeOf(TStringCollection)^);
Load: @TStringCollection.Load;
Store: @TStringCollection.Store);
RStrCollection: TStreamRec = (
ObjType: 69;
VmtLink: Ofs(TypeOf(TStrCollection)^);
Load: @TStrCollection.Load;
Store: @TStrCollection.Store);
RStringList: TStreamRec = (
ObjType: 52;
VmtLink: Ofs(TypeOf(TStringList)^);
Load: @TStringList.Load;
Store: Nil);
RStrListMaker: TStreamRec = (
ObjType: 52;
VmtLink: Ofs(TypeOf(TStrListMaker)^);
Load: Nil;
Store: @TStrListMaker.Store);
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
IMPLEMENTATION
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
{***************************************************************************}
{ HELPER ROUTINES FOR CALLING }
{***************************************************************************}
type
FramePointer = pointer;
PointerLocal = function(_EBP: FramePointer; Param1: pointer): pointer;
PointerConstructor = function(VMT: pointer; Obj: pointer; Param1: pointer): pointer;
PointerMethod = function(Obj: pointer; Param1: pointer): pointer;
function PreviousFramePointer: FramePointer;assembler;
asm
{$ifdef i386}
movl (%ebp), %eax
{$endif}
{$ifdef m68k}
move.l a6,d0
{$endif}
end ['EAX'];
function CallPointerConstructor(Ctor: pointer; Obj: pointer; VMT: pointer; Param1: pointer): pointer;
begin
asm
{$ifdef i386}
movl Obj, %esi
{$endif}
{$ifdef m68k}
move.l Obj, a5
{$endif}
end;
CallPointerConstructor := PointerConstructor(Ctor)(VMT, Obj, Param1)
end;
function CallPointerMethod(Method: pointer; Obj: pointer; Param1: pointer): pointer;
begin
asm
{$ifdef i386}
movl Obj, %esi
{$endif}
{$ifdef m68k}
move.l Obj, a5
{$endif}
end;
CallPointerMethod := PointerMethod(Method)(Obj, Param1)
end;
function CallPointerLocal(Func: pointer; Frame: FramePointer; Param1: pointer): pointer;
begin
CallPointerLocal := PointerLocal(Func)(Frame, Param1)
end;
{***************************************************************************}
{ PRIVATE INITIALIZED VARIABLES }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ INITIALIZED DOS/DPMI/WIN/OS2 PRIVATE VARIABLES }
{---------------------------------------------------------------------------}
CONST
StreamTypes: PStreamRec = Nil; { Stream types reg }
{***************************************************************************}
{ PRIVATE INTERNAL ROUTINES }
{***************************************************************************}
{$I objinc.inc}
{---------------------------------------------------------------------------}
{ RegisterError -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 12Jun96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE RegisterError;
BEGIN
RunError(212); { Register error }
END;
{***************************************************************************}
{ OBJECT METHODS }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TRect OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
PROCEDURE CheckEmpty (Var Rect: TRect);
BEGIN
With Rect Do Begin
If (A.X >= B.X) OR (A.Y >= B.Y) Then Begin { Zero or reversed }
A.X := 0; { Clear a.x }
A.Y := 0; { Clear a.y }
B.X := 0; { Clear b.x }
B.Y := 0; { Clear b.y }
End;
End;
END;
{--TRect--------------------------------------------------------------------}
{ Empty -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TRect.Empty: Boolean;
BEGIN
Empty := (A.X >= B.X) OR (A.Y >= B.Y); { Empty result }
END;
{--TRect--------------------------------------------------------------------}
{ Equals -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TRect.Equals (R: TRect): Boolean;
BEGIN
Equals := (A.X = R.A.X) AND (A.Y = R.A.Y) AND
(B.X = R.B.X) AND (B.Y = R.B.Y); { Equals result }
END;
{--TRect--------------------------------------------------------------------}
{ Contains -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TRect.Contains (P: TPoint): Boolean;
BEGIN
Contains := (P.X >= A.X) AND (P.X < B.X) AND
(P.Y >= A.Y) AND (P.Y < B.Y); { Contains result }
END;
{--TRect--------------------------------------------------------------------}
{ Copy -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRect.Copy (R: TRect);
BEGIN
A := R.A; { Copy point a }
B := R.B; { Copy point b }
END;
{--TRect--------------------------------------------------------------------}
{ Union -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRect.Union (R: TRect);
BEGIN
If (R.A.X < A.X) Then A.X := R.A.X; { Take if smaller }
If (R.A.Y < A.Y) Then A.Y := R.A.Y; { Take if smaller }
If (R.B.X > B.X) Then B.X := R.B.X; { Take if larger }
If (R.B.Y > B.Y) Then B.Y := R.B.Y; { Take if larger }
END;
{--TRect--------------------------------------------------------------------}
{ Intersect -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRect.Intersect (R: TRect);
BEGIN
If (R.A.X > A.X) Then A.X := R.A.X; { Take if larger }
If (R.A.Y > A.Y) Then A.Y := R.A.Y; { Take if larger }
If (R.B.X < B.X) Then B.X := R.B.X; { Take if smaller }
If (R.B.Y < B.Y) Then B.Y := R.B.Y; { Take if smaller }
CheckEmpty(Self); { Check if empty }
END;
{--TRect--------------------------------------------------------------------}
{ Move -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRect.Move (ADX, ADY: Sw_Integer);
BEGIN
Inc(A.X, ADX); { Adjust A.X }
Inc(A.Y, ADY); { Adjust A.Y }
Inc(B.X, ADX); { Adjust B.X }
Inc(B.Y, ADY); { Adjust B.Y }
END;
{--TRect--------------------------------------------------------------------}
{ Grow -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRect.Grow (ADX, ADY: Sw_Integer);
BEGIN
Dec(A.X, ADX); { Adjust A.X }
Dec(A.Y, ADY); { Adjust A.Y }
Inc(B.X, ADX); { Adjust B.X }
Inc(B.Y, ADY); { Adjust B.Y }
CheckEmpty(Self); { Check if empty }
END;
{--TRect--------------------------------------------------------------------}
{ Assign -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRect.Assign (XA, YA, XB, YB: Sw_Integer);
BEGIN
A.X := XA; { Hold A.X value }
A.Y := YA; { Hold A.Y value }
B.X := XB; { Hold B.X value }
B.Y := YB; { Hold B.Y value }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TObject OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
TYPE
DummyObject = OBJECT (TObject) { Internal object }
Data: RECORD END; { Helps size VMT link }
END;
{ ******************************* REMARK ****************************** }
{ I Prefer this code because it self sizes VMT link rather than using a }
{ fixed record structure thus it should work on all compilers without a }
{ specific record to match each compiler. }
{ ****************************** END REMARK *** Leon de Boer, 10May96 * }
{--TObject------------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TObject.Init;
VAR LinkSize: LongInt; Dummy: DummyObject;
BEGIN
LinkSize := LongInt(@Dummy.Data)-LongInt(@Dummy); { Calc VMT link size }
FillChar(Pointer(LongInt(@Self)+LinkSize)^,
SizeOf(Self)-LinkSize, #0); { Clear data fields }
END;
{--TObject------------------------------------------------------------------}
{ Free -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TObject.Free;
BEGIN
Dispose(PObject(@Self), Done); { Dispose of self }
END;
{--TObject------------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TObject.Done;
BEGIN { Abstract method }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TStream OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
CONSTRUCTOR TStream.Init;
BEGIN
TPCompatible := DefaultTPCompatible;
END;
{--TStream------------------------------------------------------------------}
{ Get -> Platforms DOS/DPMI/WIN/OS2 - Checked 02Sep97 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStream.Get: PObject;
VAR ObjType: Sw_Word; P: PStreamRec; ObjTypeWord: Word;
BEGIN
If TPCompatible Then Begin
{ Read 16-bit word for TP compatibility. }
Read(ObjTypeWord, SizeOf(ObjTypeWord));
ObjType := ObjTypeWord
End
else
Read(ObjType, SizeOf(ObjType)); { Read object type }
If (ObjType<>0) Then Begin { Object registered }
P := StreamTypes; { Current reg list }
While (P <> Nil) AND (P^.ObjType <> ObjType) { Find object type OR }
Do P := P^.Next; { Find end of chain }
If (P=Nil) Then Begin { Not registered }
Error(stGetError, ObjType); { Obj not registered }
Get := Nil; { Return nil pointer }
End Else
Get :=PObject(
CallPointerConstructor(P^.Load,Nil,P^.VMTLink, @Self)) { Call constructor }
End Else Get := Nil; { Return nil pointer }
END;
{--TStream------------------------------------------------------------------}
{ StrRead -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStream.StrRead: PChar;
VAR L: Word; P: PChar;
BEGIN
Read(L, SizeOf(L)); { Read length }
If (L = 0) Then StrRead := Nil Else Begin { Check for empty }
GetMem(P, L + 1); { Allocate memory }
If (P <> Nil) Then Begin { Check allocate okay }
Read(P[0], L); { Read the data }
P[L] := #0; { Terminate with #0 }
End;
StrRead := P; { Return PChar }
End;
END;
{--TStream------------------------------------------------------------------}
{ ReadStr -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStream.ReadStr: PString;
VAR L: Byte; P: PString;
BEGIN
Read(L, 1); { Read string length }
If (L > 0) Then Begin
GetMem(P, L + 1); { Allocate memory }
If (P <> Nil) Then Begin { Check allocate okay }
P^[0] := Char(L); { Hold length }
Read(P^[1], L); { Read string data }
End;
ReadStr := P; { Return string ptr }
End Else ReadStr := Nil;
END;
{--TStream------------------------------------------------------------------}
{ GetPos -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStream.GetPos: LongInt;
BEGIN
If (Status=stOk) Then GetPos := Position { Return position }
Else GetPos := -1; { Stream in error }
END;
{--TStream------------------------------------------------------------------}
{ GetSize -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStream.GetSize: LongInt;
BEGIN
If (Status=stOk) Then GetSize := StreamSize { Return stream size }
Else GetSize := -1; { Stream in error }
END;
{--TStream------------------------------------------------------------------}
{ Close -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Close;
BEGIN { Abstract method }
END;
{--TStream------------------------------------------------------------------}
{ Reset -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Reset;
BEGIN
Status := 0; { Clear status }
ErrorInfo := 0; { Clear error info }
END;
{--TStream------------------------------------------------------------------}
{ Flush -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Flush;
BEGIN { Abstract method }
END;
{--TStream------------------------------------------------------------------}
{ Truncate -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Truncate;
BEGIN
Abstract; { Abstract error }
END;
{--TStream------------------------------------------------------------------}
{ Put -> Platforms DOS/DPMI/WIN/OS2 - Checked 02Sep97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Put (P: PObject);
VAR ObjType: Sw_Word; Link: pointer; Q: PStreamRec; VmtPtr: ^pointer;
ObjTypeWord: Word;
BEGIN
VmtPtr := Pointer(P); { Xfer object to ptr }
if assigned(vmtptr) then
Link := VmtPtr^ { VMT link }
else
Link:=nil;
ObjType := 0; { Set objtype to zero }
If (P<>Nil) AND (Link<>Nil) Then Begin { We have a VMT link }
Q := StreamTypes; { Current reg list }
While (Q <> Nil) AND (Q^.VMTLink <> Link) { Find link match OR }
Do Q := Q^.Next; { Find end of chain }
If (Q=Nil) Then Begin { End of chain found }
Error(stPutError, 0); { Not registered error }
Exit; { Now exit }
End Else ObjType := Q^.ObjType; { Update object type }
End;
If TPCompatible Then Begin
ObjTypeWord := ObjType;
Write(ObjTypeWord, SizeOf(ObjTypeWord))
end
else
Write(ObjType, SizeOf(ObjType)); { Write object type }
If (ObjType<>0) Then { Registered object }
CallPointerMethod(Q^.Store, P, @Self);
END;
{--TStream------------------------------------------------------------------}
{ Seek -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Seek (Pos: LongInt);
BEGIN
If (Status = stOk) Then Begin { Check status }
If (Pos < 0) Then Pos := 0; { Remove negatives }
If (Pos <= StreamSize) Then Position := Pos { If valid set pos }
Else Error(stSeekError, Pos); { Position error }
End;
END;
{--TStream------------------------------------------------------------------}
{ StrWrite -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.StrWrite (P: PChar);
VAR L: Word; Q: PByteArray;
BEGIN
L := 0; { Preset zero size }
Q := PByteArray(P); { Transfer type }
If (Q <> Nil) Then While (Q^[L] <> 0) Do Inc(L); { PChar length }
Write(L, SizeOf(L)); { Store length }
If (P <> Nil) Then Write(P[0], L); { Write data }
END;
{--TStream------------------------------------------------------------------}
{ WriteStr -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.WriteStr (P: PString);
CONST Empty: String[1] = '';
BEGIN
If (P <> Nil) Then Write(P^, Length(P^) + 1) { Write string }
Else Write(Empty, 1); { Write empty string }
END;
{--TStream------------------------------------------------------------------}
{ Open -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Open (OpenMode: Word);
BEGIN { Abstract method }
END;
{--TStream------------------------------------------------------------------}
{ Error -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Error (Code, Info: Integer);
TYPE TErrorProc = Procedure(Var S: TStream);
BEGIN
Status := Code; { Hold error code }
ErrorInfo := Info; { Hold error info }
If (StreamError <> Nil) Then
TErrorProc(StreamError)(Self); { Call error ptr }
END;
{--TStream------------------------------------------------------------------}
{ Read -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Read (Var Buf; Count: Sw_Word);
BEGIN
Abstract; { Abstract error }
END;
{--TStream------------------------------------------------------------------}
{ Write -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.Write (Var Buf; Count: Sw_Word);
BEGIN
Abstract; { Abstract error }
END;
{--TStream------------------------------------------------------------------}
{ CopyFrom -> Platforms DOS/DPMI/WIN/OS2 - Checked 10May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStream.CopyFrom (Var S: TStream; Count: Longint);
VAR W: Word; Buffer: Array[0..1023] of Byte;
BEGIN
While (Count > 0) Do Begin
If (Count > SizeOf(Buffer)) Then { To much data }
W := SizeOf(Buffer) Else W := Count; { Size to transfer }
S.Read(Buffer, W); { Read from stream }
Write(Buffer, W); { Write to stream }
Dec(Count, W); { Dec write count }
End;
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TDosStream OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TDosStream---------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TDosStream.Init (FileName: FNameStr; Mode: Word);
VAR Success: Integer;
BEGIN
Inherited Init; { Call ancestor }
FileName := FileName+#0; { Make asciiz }
Move(FileName[1], FName, Length(FileName)); { Create asciiz name }
Handle := FileOpen(FName, Mode); { Open the file }
If (Handle <> 0) Then Begin { Handle valid }
Success := SetFilePos(Handle, 0, 2, StreamSize); { Locate end of file }
If (Success = 0) Then
Success := SetFilePos(Handle, 0, 0, Position); { Reset to file start }
End Else Success := 103; { Open file failed }
If (Handle = 0) OR (Success <> 0) Then Begin { Open failed }
Handle := InvalidHandle; { Reset invalid handle }
Error(stInitError, Success); { Call stream error }
End;
END;
{--TDosStream---------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TDosStream.Done;
BEGIN
If (Handle <> InvalidHandle) Then FileClose(Handle); { Close the file }
Inherited Done; { Call ancestor }
END;
{--TDosStream---------------------------------------------------------------}
{ Close -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TDosStream.Close;
BEGIN
If (Handle <> InvalidHandle) Then FileClose(Handle); { Close the file }
Position := 0; { Zero the position }
Handle := invalidhandle; { Handle now invalid }
END;
{--TDosStream---------------------------------------------------------------}
{ Truncate -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TDosStream.Truncate;
VAR Success: Integer;
BEGIN
If (Status=stOk) Then Begin { Check status okay }
Success := SetFileSize(Handle, Position); { Truncate file }
If (Success = 0) Then StreamSize := Position { Adjust size }
Else Error(stError, Success); { Identify error }
End;
END;
{--TDosStream---------------------------------------------------------------}
{ Seek -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TDosStream.Seek (Pos: LongInt);
VAR Success: Integer; Li: LongInt;
BEGIN
If (Status=stOk) Then Begin { Check status okay }
If (Pos < 0) Then Pos := 0; { Negatives removed }
If (Handle = InvalidHandle) Then Success := 103 Else { File not open }
Success := SetFilePos(Handle, Pos, 0, Li); { Set file position }
If ((Success = -1) OR (Li <> Pos)) Then Begin { We have an error }
If (Success = -1) Then Error(stSeekError, 0) { General seek error }
Else Error(stSeekError, Success); { Specific seek error }
End Else Position := Li; { Adjust position }
End;
END;
{--TDosStream---------------------------------------------------------------}
{ Open -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TDosStream.Open (OpenMode: Word);
BEGIN
If (Status=stOk) Then Begin { Check status okay }
If (Handle = InvalidHandle) Then Begin { File not open }
Handle := FileOpen(FName, OpenMode); { Open the file }
Position := 0; { Reset position }
If (Handle=0) Then Begin { File open failed }
Handle := InvalidHandle; { Reset handle }
Error(stOpenError, 103); { Call stream error }
End;
End Else Error(stOpenError, 104); { File already open }
End;
END;
{--TDosStream---------------------------------------------------------------}
{ Read -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TDosStream.Read (Var Buf; Count: Sw_Word);
VAR Success: Integer; W, BytesMoved: Sw_Word; P: PByteArray;
BEGIN
If (Position + Count > StreamSize) Then { Insufficient data }
Error(stReadError, 0); { Read beyond end!!! }
If (Handle = InvalidHandle) Then Error(stReadError, 103); { File not open }
P := @Buf; { Transfer address }
While (Count>0) AND (Status=stOk) Do Begin { Check status & count }
W := Count; { Transfer read size }
If (Count>MaxReadBytes) Then
W := MaxReadBytes; { Cant read >64K bytes }
Success := FileRead(Handle, P^, W, BytesMoved); { Read from file }
If ((Success<>0) OR (BytesMoved<>W)) Then Begin { Error was detected }
BytesMoved := 0; { Clear bytes moved }
If (Success <> 0) Then
Error(stReadError, Success) { Specific read error }
Else Error(stReadError, 0); { Non specific error }
End;
Inc(Position, BytesMoved); { Adjust position }
P := Pointer(LongInt(P) + BytesMoved); { Adjust buffer ptr }
Dec(Count, BytesMoved); { Adjust count left }
End;
If (Count<>0) Then FillChar(P^, Count, #0); { Error clear buffer }
END;
{--TDosStream---------------------------------------------------------------}
{ Write -> Platforms DOS/DPMI/WIN/OS2 - Checked 16May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TDosStream.Write (Var Buf; Count: Sw_Word);
VAR Success: Integer; W, BytesMoved: Sw_Word; P: PByteArray;
BEGIN
If (Handle = InvalidHandle) Then Error(stWriteError, 103); { File not open }
P := @Buf; { Transfer address }
While (Count>0) AND (Status=stOk) Do Begin { Check status & count }
W := Count; { Transfer read size }
If (Count>MaxReadBytes) Then
W := MaxReadBytes; { Cant read >64K bytes }
Success := FileWrite(Handle, P^, W, BytesMoved); { Write to file }
If ((Success<>0) OR (BytesMoved<>W)) Then Begin { Error was detected }
BytesMoved := 0; { Clear bytes moved }
If (Success<>0) Then
Error(stWriteError, Success) { Specific write error }
Else Error(stWriteError, 0); { Non specific error }
End;
Inc(Position, BytesMoved); { Adjust position }
P := Pointer(LongInt(P) + BytesMoved); { Transfer address }
Dec(Count, BytesMoved); { Adjust count left }
If (Position > StreamSize) Then { File expanded }
StreamSize := Position; { Adjust stream size }
End;
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TBufStream OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TBufStream---------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TBufStream.Init (FileName: FNameStr; Mode, Size: Word);
BEGIN
Inherited Init(FileName, Mode); { Call ancestor }
BufSize := Size; { Hold buffer size }
If (Size<>0) Then GetMem(Buffer, Size); { Allocate buffer }
If (Buffer=Nil) Then Error(stInitError, 0); { Buffer allocate fail }
END;
{--TBufStream---------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TBufStream.Done;
BEGIN
Flush; { Flush the file }
Inherited Done; { Call ancestor }
If (Buffer<>Nil) Then FreeMem(Buffer, BufSize); { Release buffer }
END;
{--TBufStream---------------------------------------------------------------}
{ Close -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Close;
BEGIN
Flush; { Flush the buffer }
Inherited Close; { Call ancestor }
END;
{--TBufStream---------------------------------------------------------------}
{ Flush -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Flush;
VAR Success: Integer; W: Sw_Word;
BEGIN
If (LastMode=2) AND (BufPtr<>0) Then Begin { Must update file }
If (Handle = InvalidHandle) Then Success := 103 { File is not open }
Else Success := FileWrite(Handle, Buffer^,
BufPtr, W); { Write to file }
If (Success<>0) OR (W<>BufPtr) Then { We have an error }
If (Success=0) Then Error(stWriteError, 0) { Unknown write error }
Else Error(stError, Success); { Specific write error }
End;
BufPtr := 0; { Reset buffer ptr }
BufEnd := 0; { Reset buffer end }
END;
{--TBufStream---------------------------------------------------------------}
{ Truncate -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Truncate;
BEGIN
Flush; { Flush buffer }
Inherited Truncate; { Truncate file }
END;
{--TBufStream---------------------------------------------------------------}
{ Seek -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Seek (Pos: LongInt);
BEGIN
If (Status=stOk) Then Begin { Check status okay }
If (Position<>Pos) Then Begin { Move required }
Flush; { Flush the buffer }
Inherited Seek(Pos); { Call ancestor }
End;
End;
END;
{--TBufStream---------------------------------------------------------------}
{ Open -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Open (OpenMode: Word);
BEGIN
If (Status=stOk) Then Begin { Check status okay }
BufPtr := 0; { Clear buffer start }
BufEnd := 0; { Clear buffer end }
Inherited Open(OpenMode); { Call ancestor }
End;
END;
{--TBufStream---------------------------------------------------------------}
{ Read -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Read (Var Buf; Count: Sw_Word);
VAR Success: Integer; W, Bw: Sw_Word; P: PByteArray;
BEGIN
If (Position + Count > StreamSize) Then { Read pas stream end }
Error(stReadError, 0); { Call stream error }
If (Handle = InvalidHandle) Then Error(stReadError, 103); { File not open }
P := @Buf; { Transfer address }
If (LastMode=2) Then Flush; { Flush write buffer }
LastMode := 1; { Now set read mode }
While (Count>0) AND (Status=stOk) Do Begin { Check status & count }
If (BufPtr=BufEnd) Then Begin { Buffer is empty }
If (Position + BufSize > StreamSize) Then
Bw := StreamSize - Position { Amount of file left }
Else Bw := BufSize; { Full buffer size }
Success := FileRead(Handle, Buffer^, Bw, W); { Read from file }
If ((Success<>0) OR (Bw<>W)) Then Begin { Error was detected }
If (Success<>0) Then
Error(stReadError, Success) { Specific read error }
Else Error(stReadError, 0); { Non specific error }
End Else Begin
BufPtr := 0; { Reset BufPtr }
BufEnd := W; { End of buffer }
End;
End;
If (Status=stOk) Then Begin { Status still okay }
W := BufEnd - BufPtr; { Space in buffer }
If (Count < W) Then W := Count; { Set transfer size }
Move(Buffer^[BufPtr], P^, W); { Data from buffer }
Dec(Count, W); { Reduce count }
Inc(BufPtr, W); { Advance buffer ptr }
P := Pointer(LongInt(P) + W); { Transfer address }
Inc(Position, W); { Advance position }
End;
End;
If (Status<>stOk) AND (Count>0) Then
FillChar(P^, Count, #0); { Error clear buffer }
END;
{--TBufStream---------------------------------------------------------------}
{ Write -> Platforms DOS/DPMI/WIN/OS2 - Checked 17May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TBufStream.Write (Var Buf; Count: Sw_Word);
VAR Success: Integer; W: Sw_Word; P: PByteArray;
BEGIN
If (Handle = InvalidHandle) Then Error(stWriteError, 103); { File not open }
If (LastMode=1) Then Flush; { Flush read buffer }
LastMode := 2; { Now set write mode }
P := @Buf; { Transfer address }
While (Count>0) AND (Status=stOk) Do Begin { Check status & count }
If (BufPtr=BufSize) Then Begin { Buffer is full }
Success := FileWrite(Handle, Buffer^, BufSize,
W); { Write to file }
If (Success<>0) OR (W<>BufSize) Then { We have an error }
If (Success=0) Then Error(stWriteError, 0) { Unknown write error }
Else Error(stError, Success); { Specific write error }
BufPtr := 0; { Reset BufPtr }
End;
If (Status=stOk) Then Begin { Status still okay }
W := BufSize - BufPtr; { Space in buffer }
If (Count < W) Then W := Count; { Transfer size }
Move(P^, Buffer^[BufPtr], W); { Data to buffer }
Dec(Count, W); { Reduce count }
Inc(BufPtr, W); { Advance buffer ptr }
P := Pointer(LongInt(P) + W); { Transfer address }
Inc(Position, W); { Advance position }
If (Position > StreamSize) Then { File has expanded }
StreamSize := Position; { Update new size }
End;
End;
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TMemoryStream OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TMemoryStream------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 19May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TMemoryStream.Init (ALimit: LongInt; ABlockSize: Word);
VAR W: Word;
BEGIN
Inherited Init; { Call ancestor }
If (ABlockSize=0) Then BlkSize := 8192 Else { Default blocksize }
BlkSize := ABlockSize; { Set blocksize }
If (ALimit = 0) Then W := 1 Else { At least 1 block }
W := (ALimit + BlkSize - 1) DIV BlkSize; { Blocks needed }
If NOT ChangeListSize(W) Then { Try allocate blocks }
Error(stInitError, 0); { Initialize error }
END;
{--TMemoryStream------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 19May96 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TMemoryStream.Done;
BEGIN
ChangeListSize(0); { Release all memory }
Inherited Done; { Call ancestor }
END;
{--TMemoryStream------------------------------------------------------------}
{ Truncate -> Platforms DOS/DPMI/WIN/OS2 - Checked 19May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TMemoryStream.Truncate;
VAR W: Word;
BEGIN
If (Status=stOk) Then Begin { Check status okay }
If (Position = 0) Then W := 1 Else { At least one block }
W := (Position + BlkSize - 1) DIV BlkSize; { Blocks needed }
If ChangeListSize(W) Then StreamSize := Position { Set stream size }
Else Error(stError, 0); { Error truncating }
End;
END;
{--TMemoryStream------------------------------------------------------------}
{ Read -> Platforms DOS/DPMI/WIN/OS2 - Checked 19May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TMemoryStream.Read (Var Buf; Count: Sw_Word);
VAR W, CurBlock, BlockPos: Word; Li: LongInt; P, Q: PByteArray;
BEGIN
If (Position + Count > StreamSize) Then { Insufficient data }
Error(stReadError, 0); { Read beyond end!!! }
P := @Buf; { Transfer address }
While (Count>0) AND (Status=stOk) Do Begin { Check status & count }
CurBlock := Position DIV BlkSize; { Current block }
{ * REMARK * - Do not shorten this, result can be > 64K }
Li := CurBlock; { Transfer current block }
Li := Li * BlkSize; { Current position }
{ * REMARK END * - Leon de Boer }
BlockPos := Position - Li; { Current position }
W := BlkSize - BlockPos; { Current block space }
If (W > Count) Then W := Count; { Adjust read size }
Q := Pointer(LongInt(BlkList^[CurBlock]) +
BlockPos); { Calc pointer }
Move(Q^, P^, W); { Move data to buffer }
Inc(Position, W); { Adjust position }
P := Pointer(LongInt(P) + W); { Transfer address }
Dec(Count, W); { Adjust count left }
End;
If (Count<>0) Then FillChar(P^, Count, #0); { Error clear buffer }
END;
{--TMemoryStream------------------------------------------------------------}
{ Write -> Platforms DOS/DPMI/WIN/OS2 - Checked 19May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TMemoryStream.Write (Var Buf; Count: Sw_Word);
VAR W, CurBlock, BlockPos: Word; Li: LongInt; P, Q: PByteArray;
BEGIN
If (Position + Count > MemSize) Then Begin { Expansion needed }
If (Position + Count = 0) Then W := 1 Else { At least 1 block }
W := (Position+Count+BlkSize-1) DIV BlkSize; { Blocks needed }
If NOT ChangeListSize(W) Then
Error(stWriteError, 0); { Expansion failed!!! }
End;
P := @Buf; { Transfer address }
While (Count>0) AND (Status=stOk) Do Begin { Check status & count }
CurBlock := Position DIV BlkSize; { Current segment }
{ * REMARK * - Do not shorten this, result can be > 64K }
Li := CurBlock; { Transfer current block }
Li := Li * BlkSize; { Current position }
{ * REMARK END * - Leon de Boer }
BlockPos := Position - Li; { Current position }
W := BlkSize - BlockPos; { Current block space }
If (W > Count) Then W := Count; { Adjust write size }
Q := Pointer(LongInt(BlkList^[CurBlock]) +
BlockPos); { Calc pointer }
Move(P^, Q^, W); { Transfer data }
Inc(Position, W); { Adjust position }
P := Pointer(LongInt(P) + W); { Transfer address }
Dec(Count, W); { Adjust count left }
If (Position > StreamSize) Then { File expanded }
StreamSize := Position; { Adjust stream size }
End;
END;
{***************************************************************************}
{ TMemoryStream PRIVATE METHODS }
{***************************************************************************}
{--TMemoryStream------------------------------------------------------------}
{ ChangeListSize -> Platforms DOS/DPMI/WIN/OS2 - Checked 19May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TMemoryStream.ChangeListSize (ALimit: Sw_Word): Boolean;
VAR I, W: Word; Li: LongInt; P: PPointerArray;
BEGIN
If (ALimit <> BlkCount) Then Begin { Change is needed }
ChangeListSize := False; { Preset failure }
If (ALimit > MaxPtrs) Then Exit; { To many blocks req }
If (ALimit <> 0) Then Begin { Create segment list }
Li := ALimit * SizeOf(Pointer); { Block array size }
If (MaxAvail > Li) Then Begin
GetMem(P, Li); { Allocate memory }
FillChar(P^, Li, #0); { Clear the memory }
End Else Exit; { Insufficient memory }
If (BlkCount <> 0) AND (BlkList <> Nil) Then { Current list valid }
If (BlkCount <= ALimit) Then Move(BlkList^,
P^, BlkCount * SizeOf(Pointer)) Else { Move whole old list }
Move(BlkList^, P^, Li); { Move partial list }
End Else P := Nil; { No new block list }
If (ALimit < BlkCount) Then { Shrink stream size }
For W := BlkCount-1 DownTo ALimit Do
FreeMem(BlkList^[W], BlkSize); { Release memory block }
If (P <> Nil) AND (ALimit > BlkCount) Then Begin { Expand stream size }
For W := BlkCount To ALimit-1 Do Begin
If (MaxAvail < BlkSize) Then Begin { Check enough memory }
For I := BlkCount To W-1 Do
FreeMem(P^[I], BlkSize); { Free mem allocated }
FreeMem(P, Li); { Release memory }
Exit; { Now exit }
End Else GetMem(P^[W], BlkSize); { Allocate memory }
End;
End;
If (BlkCount <> 0) AND (BlkList<>Nil) Then
FreeMem(BlkList, BlkCount * SizeOf(Pointer)); { Release old list }
BlkList := P; { Hold new block list }
BlkCount := ALimit; { Hold new count }
{ * REMARK * - Do not shorten this, result can be > 64K }
MemSize := BlkCount; { Block count }
MemSize := MemSize * BlkSize; { Current position }
{ * REMARK END * - Leon de Boer }
End;
ChangeListSize := True; { Successful }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TCollection OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TCollection--------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TCollection.Init (ALimit, ADelta: Sw_Integer);
BEGIN
Inherited Init; { Call ancestor }
Delta := ADelta; { Set increment }
SetLimit(ALimit); { Set limit }
END;
{--TCollection--------------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TCollection.Load (Var S: TStream);
VAR C, I: Sw_Integer;
BEGIN
If S.TPCompatible Then Begin
{ I ignore endianness issues here. If endianness is different,
you can't expect binary compatible resources anyway. }
Count := 0; S.Read(Count, Sizeof(Word));
Limit := 0; S.Read(Limit, Sizeof(Word));
Delta := 0; S.Read(Delta, Sizeof(Word))
End
Else Begin
S.Read(Count, Sizeof(Count)); { Read count }
S.Read(Limit, Sizeof(Limit)); { Read limit }
S.Read(Delta, Sizeof(Delta)); { Read delta }
End;
Items := Nil; { Clear item pointer }
C := Count; { Hold count }
I := Limit; { Hold limit }
Count := 0; { Clear count }
Limit := 0; { Clear limit }
SetLimit(I); { Set requested limit }
Count := C; { Set count }
For I := 0 To C-1 Do AtPut(I, GetItem(S)); { Get each item }
END;
{--TCollection--------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TCollection.Done;
BEGIN
FreeAll; { Free all items }
SetLimit(0); { Release all memory }
END;
{--TCollection--------------------------------------------------------------}
{ At -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TCollection.At (Index: Sw_Integer): Pointer;
BEGIN
If (Index < 0) OR (Index >= Count) Then Begin { Invalid index }
Error(coIndexError, Index); { Call error }
At := Nil; { Return nil }
End Else At := Items^[Index]; { Return item }
END;
{--TCollection--------------------------------------------------------------}
{ IndexOf -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TCollection.IndexOf (Item: Pointer): Sw_Integer;
VAR I: Sw_Integer;
BEGIN
If (Count>0) Then Begin { Count is positive }
For I := 0 To Count-1 Do { For each item }
If (Items^[I]=Item) Then Begin { Look for match }
IndexOf := I; { Return index }
Exit; { Now exit }
End;
End;
IndexOf := -1; { Return index }
END;
{--TCollection--------------------------------------------------------------}
{ GetItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TCollection.GetItem (Var S: TStream): Pointer;
BEGIN
GetItem := S.Get; { Item off stream }
END;
{--TCollection--------------------------------------------------------------}
{ LastThat -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TCollection.LastThat (Test: Pointer): Pointer;
VAR I: LongInt;
BEGIN
For I := Count DownTo 1 Do
Begin { Down from last item }
IF Boolean(Byte(Longint(CallPointerLocal(Test,PreviousFramePointer,Items^[I-1])))) THEN
Begin { Test each item }
LastThat := Items^[I-1]; { Return item }
Exit; { Now exit }
End;
End;
LastThat := Nil; { None passed test }
END;
{--TCollection--------------------------------------------------------------}
{ FirstThat -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TCollection.FirstThat (Test: Pointer): Pointer;
VAR I: LongInt;
BEGIN
For I := 1 To Count Do Begin { Up from first item }
IF Boolean(Byte(Longint(CallPointerLocal(Test,PreviousFramePointer,Items^[I-1])))) THEN
Begin { Test each item }
FirstThat := Items^[I-1]; { Return item }
Exit; { Now exit }
End;
End;
FirstThat := Nil; { None passed test }
END;
{--TCollection--------------------------------------------------------------}
{ Pack -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.Pack;
VAR I, J: Sw_Integer;
BEGIN
I := 0; { Initialize dest }
J := 0; { Intialize test }
While (I<Count) AND (J<Limit) Do Begin { Check fully packed }
If (Items^[J]<>Nil) Then Begin { Found a valid item }
If (I<>J) Then Begin
Items^[I] := Items^[J]; { Transfer item }
Items^[J] := Nil; { Now clear old item }
End;
Inc(I); { One item packed }
End;
Inc(J); { Next item to test }
End;
If (I<Count) Then Count := I; { New packed count }
END;
{--TCollection--------------------------------------------------------------}
{ FreeAll -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.FreeAll;
VAR I: Sw_Integer;
BEGIN
for I := Count-1 downto 0 do
FreeItem(At(I));
Count := 0; { Clear item count }
END;
{--TCollection--------------------------------------------------------------}
{ DeleteAll -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.DeleteAll;
BEGIN
Count := 0; { Clear item count }
END;
{--TCollection--------------------------------------------------------------}
{ Free -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.Free (Item: Pointer);
BEGIN
Delete(Item); { Delete from list }
FreeItem(Item); { Free the item }
END;
{--TCollection--------------------------------------------------------------}
{ Insert -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.Insert (Item: Pointer);
BEGIN
AtInsert(Count, Item); { Insert item }
END;
{--TCollection--------------------------------------------------------------}
{ Delete -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.Delete (Item: Pointer);
BEGIN
AtDelete(IndexOf(Item)); { Delete from list }
END;
{--TCollection--------------------------------------------------------------}
{ AtFree -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.AtFree (Index: Sw_Integer);
VAR Item: Pointer;
BEGIN
Item := At(Index); { Retreive item ptr }
AtDelete(Index); { Delete item }
FreeItem(Item); { Free the item }
END;
{--TCollection--------------------------------------------------------------}
{ FreeItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.FreeItem (Item: Pointer);
VAR P: PObject;
BEGIN
P := PObject(Item); { Convert pointer }
If (P<>Nil) Then Dispose(P, Done); { Dispose of object }
END;
{--TCollection--------------------------------------------------------------}
{ AtDelete -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.AtDelete (Index: Sw_Integer);
BEGIN
If (Index >= 0) AND (Index < Count) Then Begin { Valid index }
Dec(Count); { One less item }
If (Count>Index) Then Move(Items^[Index+1],
Items^[Index], (Count-Index)*Sizeof(Pointer)); { Shuffle items down }
End Else Error(coIndexError, Index); { Index error }
END;
{--TCollection--------------------------------------------------------------}
{ ForEach -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.ForEach (Action: Pointer);
VAR I: LongInt;
BEGIN
For I := 1 To Count Do { Up from first item }
CallPointerLocal(Action,PreviousFramePointer,Items^[I-1]); { Call with each item }
END;
{--TCollection--------------------------------------------------------------}
{ SetLimit -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.SetLimit (ALimit: Sw_Integer);
VAR
AItems: PItemList;
BEGIN
If (ALimit < Count) Then
ALimit := Count;
If (ALimit > MaxCollectionSize) Then
ALimit := MaxCollectionSize;
If (ALimit <> Limit) Then
Begin
If (ALimit = 0) Then
AItems := Nil
Else
Begin
GetMem(AItems, ALimit * SizeOf(Pointer));
If (AItems<>Nil) Then
FillChar(AItems^,ALimit * SizeOf(Pointer), #0);
End;
If (AItems<>Nil) OR (ALimit=0) Then
Begin
If (AItems <>Nil) AND (Items <> Nil) Then
Move(Items^, AItems^, Count*SizeOf(Pointer));
If (Limit <> 0) AND (Items <> Nil) Then
FreeMem(Items, Limit * SizeOf(Pointer));
end;
Items := AItems;
Limit := ALimit;
End;
END;
{--TCollection--------------------------------------------------------------}
{ Error -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.Error (Code, Info: Integer);
BEGIN
RunError(212 - Code); { Run error }
END;
{--TCollection--------------------------------------------------------------}
{ AtPut -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.AtPut (Index: Sw_Integer; Item: Pointer);
BEGIN
If (Index >= 0) AND (Index < Count) Then { Index valid }
Items^[Index] := Item { Put item in index }
Else Error(coIndexError, Index); { Index error }
END;
{--TCollection--------------------------------------------------------------}
{ AtInsert -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.AtInsert (Index: Sw_Integer; Item: Pointer);
VAR I: Sw_Integer;
BEGIN
If (Index >= 0) AND (Index <= Count) Then Begin { Valid index }
If (Count=Limit) Then SetLimit(Limit+Delta); { Expand size if able }
If (Limit>Count) Then Begin
If (Index < Count) Then Begin { Not last item }
For I := Count-1 DownTo Index Do { Start from back }
Items^[I+1] := Items^[I]; { Move each item }
End;
Items^[Index] := Item; { Put item in list }
Inc(Count); { Inc count }
End Else Error(coOverflow, Index); { Expand failed }
End Else Error(coIndexError, Index); { Index error }
END;
{--TCollection--------------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.Store (Var S: TStream);
var
LimitWord, DeltaWord: Word;
PROCEDURE DoPutItem (P: Pointer);{$IFNDEF FPC}FAR;{$ENDIF}
BEGIN
PutItem(S, P); { Put item on stream }
END;
BEGIN
If S.TPCompatible Then Begin
{ Check if it is safe to write in TP-compatible stream.
If Count is too big, signal an error.
If Limit or Delta are too big, write smaller values. }
If (Count > MaxTPCompatibleCollectionSize)
Then S.Error(stWriteError, 0)
Else Begin
S.Write(Count, Sizeof(Word));
if Limit > MaxTPCompatibleCollectionSize
then LimitWord := MaxTPCompatibleCollectionSize
else LimitWord := Limit;
S.Write(LimitWord, Sizeof(Word));
if Delta > MaxTPCompatibleCollectionSize
then DeltaWord := MaxTPCompatibleCollectionSize
else DeltaWord := Delta;
S.Write(DeltaWord, Sizeof(Word));
End
End
Else Begin
S.Write(Count, Sizeof(Count)); { Write count }
S.Write(Limit, Sizeof(Limit)); { Write limit }
S.Write(Delta, Sizeof(Delta)); { Write delta }
End;
ForEach(@DoPutItem); { Each item to stream }
END;
{--TCollection--------------------------------------------------------------}
{ PutItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TCollection.PutItem (Var S: TStream; Item: Pointer);
BEGIN
S.Put(Item); { Put item on stream }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TSortedCollection OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TSortedCollection--------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TSortedCollection.Init (ALimit, ADelta: Sw_Integer);
BEGIN
Inherited Init(ALimit, ADelta); { Call ancestor }
Duplicates := False; { Clear flag }
END;
{--TSortedCollection--------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TSortedCollection.Load (Var S: TStream);
BEGIN
Inherited Load(S); { Call ancestor }
S.Read(Duplicates, SizeOf(Duplicates)); { Read duplicate flag }
END;
{--TSortedCollection--------------------------------------------------------}
{ KeyOf -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TSortedCollection.KeyOf (Item: Pointer): Pointer;
BEGIN
KeyOf := Item; { Return item as key }
END;
{--TSortedCollection--------------------------------------------------------}
{ IndexOf -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TSortedCollection.IndexOf (Item: Pointer): Sw_Integer;
VAR I, J: Sw_Integer;
BEGIN
J := -1; { Preset result }
If Search(KeyOf(Item), I) Then Begin { Search for item }
If Duplicates Then { Duplicates allowed }
While (I < Count) AND (Item <> Items^[I]) Do
Inc(I); { Count duplicates }
If (I < Count) Then J := I; { Index result }
End;
IndexOf := J; { Return result }
END;
{--TSortedCollection--------------------------------------------------------}
{ Compare -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TSortedCollection.Compare (Key1, Key2: Pointer): Sw_Integer;
BEGIN
Abstract; { Abstract method }
Compare:=0;
END;
{--TSortedCollection--------------------------------------------------------}
{ Search -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TSortedCollection.Search (Key: Pointer; Var Index: Sw_Integer): Boolean;
VAR L, H, I, C: Sw_Integer;
BEGIN
Search := False; { Preset failure }
L := 0; { Start count }
H := Count - 1; { End count }
While (L <= H) Do Begin
I := (L + H) SHR 1; { Mid point }
C := Compare(KeyOf(Items^[I]), Key); { Compare with key }
If (C < 0) Then L := I + 1 Else Begin { Item to left }
H := I - 1; { Item to right }
If C = 0 Then Begin { Item match found }
Search := True; { Result true }
If NOT Duplicates Then L := I; { Force kick out }
End;
End;
End;
Index := L; { Return result }
END;
{--TSortedCollection--------------------------------------------------------}
{ Insert -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TSortedCollection.Insert (Item: Pointer);
VAR I: Sw_Integer;
BEGIN
If NOT Search(KeyOf(Item), I) OR Duplicates Then { Item valid }
AtInsert(I, Item); { Insert the item }
END;
{--TSortedCollection--------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TSortedCollection.Store (Var S: TStream);
BEGIN
TCollection.Store(S); { Call ancestor }
S.Write(Duplicates, SizeOf(Duplicates)); { Write duplicate flag }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TStringCollection OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TStringCollection--------------------------------------------------------}
{ GetItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStringCollection.GetItem (Var S: TStream): Pointer;
BEGIN
GetItem := S.ReadStr; { Get new item }
END;
{--TStringCollection--------------------------------------------------------}
{ Compare -> Platforms DOS/DPMI/WIN/OS2 - Checked 21Aug97 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStringCollection.Compare (Key1, Key2: Pointer): Sw_Integer;
VAR I, J: Sw_Integer; P1, P2: PString;
BEGIN
P1 := PString(Key1); { String 1 pointer }
P2 := PString(Key2); { String 2 pointer }
If (Length(P1^)<Length(P2^)) Then J := Length(P1^)
Else J := Length(P2^); { Shortest length }
I := 1; { First character }
While (I<J) AND (P1^[I]=P2^[I]) Do Inc(I); { Scan till fail }
If (I=J) Then Begin { Possible match }
{ * REMARK * - Bug fix 21 August 1997 }
If (P1^[I]<P2^[I]) Then Compare := -1 Else { String1 < String2 }
If (P1^[I]>P2^[I]) Then Compare := 1 Else { String1 > String2 }
If (Length(P1^)>Length(P2^)) Then Compare := 1 { String1 > String2 }
Else If (Length(P1^)<Length(P2^)) Then { String1 < String2 }
Compare := -1 Else Compare := 0; { String1 = String2 }
{ * REMARK END * - Leon de Boer }
End Else If (P1^[I]<P2^[I]) Then Compare := -1 { String1 < String2 }
Else Compare := 1; { String1 > String2 }
END;
{--TStringCollection--------------------------------------------------------}
{ FreeItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStringCollection.FreeItem (Item: Pointer);
BEGIN
DisposeStr(Item); { Dispose item }
END;
{--TStringCollection--------------------------------------------------------}
{ PutItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 22May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStringCollection.PutItem (Var S: TStream; Item: Pointer);
BEGIN
S.WriteStr(Item); { Write string }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TStrCollection OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TStrCollection-----------------------------------------------------------}
{ Compare -> Platforms DOS/DPMI/WIN/OS2 - Checked 23May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStrCollection.Compare (Key1, Key2: Pointer): Sw_Integer;
VAR I, J: Sw_Integer; P1, P2: PByteArray;
BEGIN
P1 := PByteArray(Key1); { PChar 1 pointer }
P2 := PByteArray(Key2); { PChar 2 pointer }
I := 0; { Preset no size }
If (P1<>Nil) Then While (P1^[I]<>0) Do Inc(I); { PChar 1 length }
J := 0; { Preset no size }
If (P2<>Nil) Then While (P2^[J]<>0) Do Inc(J); { PChar 2 length }
If (I < J) Then J := I; { Shortest length }
I := 0; { First character }
While (I<J) AND (P1^[I]=P2^[I]) Do Inc(I); { Scan till fail }
If (P1^[I]=P2^[I]) Then Compare := 0 Else { Strings matched }
If (P1^[I]<P2^[I]) Then Compare := -1 Else { String1 < String2 }
Compare := 1; { String1 > String2 }
END;
{--TStrCollection-----------------------------------------------------------}
{ GetItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 23May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStrCollection.GetItem (Var S: TStream): Pointer;
BEGIN
GetItem := S.StrRead; { Get string item }
END;
{--TStrCollection-----------------------------------------------------------}
{ FreeItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 23May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStrCollection.FreeItem (Item: Pointer);
VAR I: Sw_Integer; P: PByteArray;
BEGIN
If (Item<>Nil) Then Begin { Item is valid }
P := PByteArray(Item); { Create byte pointer }
I := 0; { Preset no size }
While (P^[I]<>0) Do Inc(I); { Find PChar end }
FreeMem(Item, I+1); { Release memory }
End;
END;
{--TStrCollection-----------------------------------------------------------}
{ PutItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 23May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStrCollection.PutItem (Var S: TStream; Item: Pointer);
BEGIN
S.StrWrite(Item); { Write the string }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TUnSortedStrCollection OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TUnSortedCollection------------------------------------------------------}
{ Insert -> Platforms DOS/DPMI/WIN/OS2 - Checked 23May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TUnSortedStrCollection.Insert (Item: Pointer);
BEGIN
AtInsert(Count, Item); { Insert - NO sorting }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TResourceItem RECORD }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
TYPE
TResourceItem = packed RECORD
Posn: LongInt; { Resource position }
Size: LongInt; { Resource size }
Key : String; { Resource key }
End;
PResourceItem = ^TResourceItem;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TResourceCollection OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TResourceCollection------------------------------------------------------}
{ KeyOf -> Platforms DOS/DPMI/WIN/OS2 - Checked 24May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TResourceCollection.KeyOf (Item: Pointer): Pointer;
BEGIN
KeyOf := @PResourceItem(Item)^.Key; { Pointer to key }
END;
{--TResourceCollection------------------------------------------------------}
{ GetItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 24May96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TResourceCollection.GetItem (Var S: TStream): Pointer;
VAR B: Byte; Pos: Longint; Size: Longint; Ts: String; P: PResourceItem;
BEGIN
S.Read(Pos, SizeOf(Pos)); { Read position }
S.Read(Size, SizeOf(Size)); { Read size }
S.Read(B, 1); { Read key length }
GetMem(P, B + (SizeOf(TResourceItem) -
SizeOf(Ts) + 1)); { Allocate min memory }
If (P<>Nil) Then Begin { If allocate works }
P^.Posn := Pos; { Xfer position }
P^.Size := Size; { Xfer size }
P^.Key[0] := Char(B); { Xfer string length }
S.Read(P^.Key[1], B); { Xfer string data }
End;
GetItem := P; { Return pointer }
END;
{--TResourceCollection------------------------------------------------------}
{ FreeItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 24May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TResourceCollection.FreeItem (Item: Pointer);
VAR Ts: String;
BEGIN
If (Item<>Nil) Then FreeMem(Item,
SizeOf(TResourceItem) - SizeOf(Ts) +
Length(PResourceItem(Item)^.Key) + 1); { Release memory }
END;
{--TResourceCollection------------------------------------------------------}
{ PutItem -> Platforms DOS/DPMI/WIN/OS2 - Checked 24May96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TResourceCollection.PutItem (Var S: TStream; Item: Pointer);
VAR Ts: String;
BEGIN
If (Item<>Nil) Then S.Write(PResourceItem(Item)^,
SizeOf(TResourceItem) - SizeOf(Ts) +
Length(PResourceItem(Item)^.Key) + 1); { Write to stream }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ PRIVATE RESOURCE MANAGER CONSTANTS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
CONST
RStreamMagic: LongInt = $52504246; { 'FBPR' }
RStreamBackLink: LongInt = $4C424246; { 'FBBL' }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ PRIVATE RESOURCE MANAGER TYPES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
TYPE
{$IFDEF NewExeFormat} { New EXE format }
TExeHeader = packed RECORD
eHdrSize: Word;
eMinAbove: Word;
eMaxAbove: Word;
eInitSS: Word;
eInitSP: Word;
eCheckSum: Word;
eInitPC: Word;
eInitCS: Word;
eRelocOfs: Word;
eOvlyNum: Word;
eRelocTab: Word;
eSpace: Array[1..30] of Byte;
eNewHeader: Word;
END;
{$ENDIF}
THeader = packed RECORD
Signature: Word;
Case Integer Of
0: (
LastCount: Word;
PageCount: Word;
ReloCount: Word);
1: (
InfoType: Word;
InfoSize: Longint);
End;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TResourceFile OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TResourceFile------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TResourceFile.Init(AStream: PStream);
VAR Found, Stop: Boolean; Header: THeader;
{$IFDEF NewExeFormat} ExeHeader: TExeHeader; {$ENDIF}
BEGIN
TObject.Init; { Initialize object }
Found := False; { Preset false }
If (AStream<>Nil) Then Begin
Stream := AStream; { Hold stream }
BasePos := Stream^.GetPos; { Get position }
Repeat
Stop := True; { Preset stop }
If (BasePos <= Stream^.GetSize-SizeOf(THeader))
Then Begin { Valid file header }
Stream^.Seek(BasePos); { Seek to position }
Stream^.Read(Header, SizeOf(THeader)); { Read header }
Case Header.Signature Of
{$IFDEF NewExeFormat} { New format file }
$5A4D: Begin
Stream^.Read(ExeHeader, SizeOf(TExeHeader));
BasePos := ExeHeader.eNewHeader; { Hold position }
Stop := False; { Clear stop flag }
End;
$454E: Begin
BasePos := Stream^.GetSize - 8; { Hold position }
Stop := False; { Clear stop flag }
End;
$4246: Begin
Stop := False; { Clear stop flag }
Case Header.Infotype Of
$5250: Begin { Found Resource }
Found := True; { Found flag is true }
Stop := True; { Set stop flag }
End;
$4C42: Dec(BasePos, Header.InfoSize-8);{ Found BackLink }
$4648: Dec(BasePos, SizeOf(THeader)*2);{ Found HelpFile }
Else Stop := True; { Set stop flag }
End;
End;
$424E: If Header.InfoType = $3230 { Found Debug Info }
Then Begin
Dec(BasePos, Header.InfoSize); { Adjust position }
Stop := False; { Clear stop flag }
End;
{$ELSE}
$5A4D: Begin
Inc(BasePos, LongInt(Header.PageCount)*512
- (-Header.LastCount AND 511)); { Calc position }
Stop := False; { Clear stop flag }
End;
$4246: If Header.InfoType = $5250 Then { Header was found }
Found := True Else Begin
Inc(BasePos, Header.InfoSize + 8); { Adjust position }
Stop := False; { Clear stop flag }
End;
{$ENDIF}
End;
End;
Until Stop; { Until flag is set }
End;
If Found Then Begin { Resource was found }
Stream^.Seek(BasePos + SizeOf(LongInt) * 2); { Seek to position }
Stream^.Read(IndexPos, SizeOf(LongInt)); { Read index position }
Stream^.Seek(BasePos + IndexPos); { Seek to resource }
Index.Load(Stream^); { Load resource }
End Else Begin
IndexPos := SizeOf(LongInt) * 3; { Set index position }
Index.Init(0, 8); { Set index }
End;
END;
{--TResourceFile------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TResourceFile.Done;
BEGIN
Flush; { Flush the file }
Index.Done; { Dispose of index }
If (Stream<>Nil) Then Dispose(Stream, Done); { Dispose of stream }
END;
{--TResourceFile------------------------------------------------------------}
{ Count -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TResourceFile.Count: Sw_Integer;
BEGIN
Count := Index.Count; { Return index count }
END;
{--TResourceFile------------------------------------------------------------}
{ KeyAt -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TResourceFile.KeyAt (I: Sw_Integer): String;
BEGIN
KeyAt := PResourceItem(Index.At(I))^.Key; { Return key }
END;
{--TResourceFile------------------------------------------------------------}
{ Get -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TResourceFile.Get (Key: String): PObject;
VAR I: Sw_Integer;
BEGIN
If (Stream = Nil) OR (NOT Index.Search(@Key, I)) { No match on key }
Then Get := Nil Else Begin
Stream^.Seek(BasePos +
PResourceItem(Index.At(I))^.Posn); { Seek to position }
Get := Stream^.Get; { Get item }
End;
END;
{--TResourceFile------------------------------------------------------------}
{ SwitchTo -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
FUNCTION TResourceFile.SwitchTo (AStream: PStream; Pack: Boolean): PStream;
VAR NewBasePos: LongInt;
PROCEDURE DoCopyResource (Item: PResourceItem);{$IFNDEF FPC}FAR;{$ENDIF}
BEGIN
Stream^.Seek(BasePos + Item^.Posn); { Move stream position }
Item^.Posn := AStream^.GetPos - NewBasePos; { Hold new position }
AStream^.CopyFrom(Stream^, Item^.Size); { Copy the item }
END;
BEGIN
SwitchTo := Stream; { Preset return }
If (AStream<>Nil) AND (Stream<>Nil) Then Begin { Both streams valid }
NewBasePos := AStream^.GetPos; { Get position }
If Pack Then Begin
AStream^.Seek(NewBasePos + SizeOf(LongInt)*3); { Seek to position }
Index.ForEach(@DoCopyResource); { Copy each resource }
IndexPos := AStream^.GetPos - NewBasePos; { Hold index position }
End Else Begin
Stream^.Seek(BasePos); { Seek to position }
AStream^.CopyFrom(Stream^, IndexPos); { Copy the resource }
End;
Stream := AStream; { Hold new stream }
BasePos := NewBasePos; { New base position }
Modified := True; { Set modified flag }
End;
END;
{--TResourceFile------------------------------------------------------------}
{ Flush -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TResourceFile.Flush;
VAR ResSize: LongInt; LinkSize: LongInt;
BEGIN
If (Modified) AND (Stream<>Nil) Then Begin { We have modification }
Stream^.Seek(BasePos + IndexPos); { Seek to position }
Index.Store(Stream^); { Store the item }
ResSize := Stream^.GetPos - BasePos; { Hold position }
LinkSize := ResSize + SizeOf(LongInt) * 2; { Hold link size }
Stream^.Write(RStreamBackLink, SizeOf(LongInt)); { Write link back }
Stream^.Write(LinkSize, SizeOf(LongInt)); { Write link size }
Stream^.Seek(BasePos); { Move stream position }
Stream^.Write(RStreamMagic, SizeOf(LongInt)); { Write number }
Stream^.Write(ResSize, SizeOf(LongInt)); { Write record size }
Stream^.Write(IndexPos, SizeOf(LongInt)); { Write index position }
Stream^.Flush; { Flush the stream }
End;
Modified := False; { Clear modified flag }
END;
{--TResourceFile------------------------------------------------------------}
{ Delete -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TResourceFile.Delete (Key: String);
VAR I: Sw_Integer;
BEGIN
If Index.Search(@Key, I) Then Begin { Search for key }
Index.Free(Index.At(I)); { Delete from index }
Modified := True; { Set modified flag }
End;
END;
{--TResourceFile------------------------------------------------------------}
{ Put -> Platforms DOS/DPMI/WIN/OS2 - Checked 18Jun96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TResourceFile.Put (Item: PObject; Key: String);
VAR I: Sw_Integer; Ts: String; P: PResourceItem;
BEGIN
If (Stream=Nil) Then Exit; { Stream not valid }
If Index.Search(@Key, I) Then P := Index.At(I) { Search for item }
Else Begin
GetMem(P, Length(Key) + (SizeOf(TResourceItem) -
SizeOf(Ts) + 1)); { Allocate memory }
If (P<>Nil) Then Begin
P^.Key := Key; { Store key }
Index.AtInsert(I, P); { Insert item }
End;
End;
If (P<>Nil) Then Begin
P^.Posn := IndexPos; { Set index position }
Stream^.Seek(BasePos + IndexPos); { Seek file position }
Stream^.Put(Item); { Put item on stream }
IndexPos := Stream^.GetPos - BasePos; { Hold index position }
P^.Size := IndexPos - P^.Posn; { Calc size }
Modified := True; { Set modified flag }
End;
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TStringList OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TStringList--------------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TStringList.Load (Var S: TStream);
VAR Size: Word;
BEGIN
Stream := @S; { Hold stream pointer }
S.Read(Size, SizeOf(Word)); { Read size }
BasePos := S.GetPos; { Hold position }
S.Seek(BasePos + Size); { Seek to position }
S.Read(IndexSize, SizeOf(Integer)); { Read index size }
GetMem(Index, IndexSize * SizeOf(TStrIndexRec)); { Allocate memory }
S.Read(Index^, IndexSize * SizeOf(TStrIndexRec)); { Read indexes }
END;
{--TStringList--------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TStringList.Done;
BEGIN
FreeMem(Index, IndexSize * SizeOf(TStrIndexRec)); { Release memory }
END;
{--TStringList--------------------------------------------------------------}
{ Get -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStringList.Get (Key: Sw_Word): String;
VAR I: Word; S: String;
BEGIN
S := ''; { Preset empty string }
If (IndexSize>0) Then Begin { We must have strings }
I := 0; { First entry }
While (I<IndexSize) AND (S='') Do Begin
If ((Key - Index^[I].Key)<Index^[I].Count) { Diff less than count }
Then ReadStr(S, Index^[I].Offset,
Key-Index^[I].Key); { Read the string }
Inc(I); { Next entry }
End;
End;
Get := S; { Return empty string }
END;
{***************************************************************************}
{ TStringList PRIVATE METHODS }
{***************************************************************************}
{--TStringLis---------------------------------------------------------------}
{ ReadStr -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStringList.ReadStr (Var S: String; Offset, Skip: Sw_Word);
BEGIN
Stream^.Seek(BasePos + Offset); { Seek to position }
Inc(Skip); { Adjust skip }
Repeat
Stream^.Read(S[0], 1); { Read string size }
Stream^.Read(S[1], Ord(S[0])); { Read string data }
Dec(Skip); { One string read }
Until (Skip = 0);
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TStrListMaker OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TStrListMaker------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TStrListMaker.Init (AStrSize, AIndexSize: Sw_Word);
BEGIN
Inherited Init; { Call ancestor }
StrSize := AStrSize; { Hold size }
IndexSize := AIndexSize; { Hold index size }
GetMem(Strings, AStrSize); { Allocate memory }
GetMem(Index, AIndexSize * SizeOf(TStrIndexRec)); { Allocate memory }
END;
{--TStrListMaker------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TStrListMaker.Done;
BEGIN
FreeMem(Index, IndexSize * SizeOf(TStrIndexRec)); { Free index memory }
FreeMem(Strings, StrSize); { Free data memory }
END;
{--TStrListMaker------------------------------------------------------------}
{ Put -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStrListMaker.Put (Key: Sw_Word; S: String);
BEGIN
If (Cur.Count = 16) OR (Key <> Cur.Key + Cur.Count)
Then CloseCurrent; { Close current }
If (Cur.Count = 0) Then Begin
Cur.Key := Key; { Set key }
Cur.Offset := StrPos; { Set offset }
End;
Inc(Cur.Count); { Inc count }
Move(S, Strings^[StrPos], Length(S) + 1); { Move string data }
Inc(StrPos, Length(S) + 1); { Adjust position }
END;
{--TStrListMaker------------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStrListMaker.Store (Var S: TStream);
BEGIN
CloseCurrent; { Close all current }
S.Write(StrPos, SizeOf(Word)); { Write position }
S.Write(Strings^, StrPos); { Write string data }
S.Write(IndexPos, SizeOf(Word)); { Write index position }
S.Write(Index^, IndexPos * SizeOf(TStrIndexRec)); { Write indexes }
END;
{***************************************************************************}
{ TStrListMaker PRIVATE METHODS }
{***************************************************************************}
{--TStrListMaker------------------------------------------------------------}
{ CloseCurrent -> Platforms DOS/DPMI/WIN/OS2 - Checked 30Jun97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TStrListMaker.CloseCurrent;
BEGIN
If (Cur.Count <> 0) Then Begin
Index^[IndexPos] := Cur; { Hold index position }
Inc(IndexPos); { Next index }
Cur.Count := 0; { Adjust count }
End;
END;
{***************************************************************************}
{ INTERFACE ROUTINES }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ DYNAMIC STRING INTERFACE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ NewStr -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 12Jun96 LdB }
{---------------------------------------------------------------------------}
FUNCTION NewStr (Const S: String): PString;
VAR P: PString;
BEGIN
If (S = '') Then P := Nil Else Begin { Return nil }
GetMem(P, Length(S) + 1); { Allocate memory }
If (P<>Nil) Then P^ := S; { Hold string }
End;
NewStr := P; { Return result }
END;
{---------------------------------------------------------------------------}
{ DisposeStr -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 12Jun96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE DisposeStr (P: PString);
BEGIN
If (P <> Nil) Then FreeMem(P, Length(P^) + 1); { Release memory }
END;
PROCEDURE SetStr(VAR p:pString; CONST s:STRING);
BEGIN
IF p<>NIL THEN
FreeMem(P, Length(P^) + 1);
GetMem(p,LENGTH(s)+1);
pSTRING(p)^ := s
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ STREAM INTERFACE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ Abstract -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 12Jun96 LdB }
{---------------------------------------------------------------------------}
PROCEDURE Abstract;
BEGIN
RunError(211); { Abstract error }
END;
{---------------------------------------------------------------------------}
{ RegisterObjects -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 02Sep97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE RegisterObjects;
BEGIN
RegisterType(RCollection); { Register object }
RegisterType(RStringCollection); { Register object }
RegisterType(RStrCollection); { Register object }
END;
{---------------------------------------------------------------------------}
{ RegisterType -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 02Sep97 LdB }
{---------------------------------------------------------------------------}
PROCEDURE RegisterType (Var S: TStreamRec);
VAR P: PStreamRec;
BEGIN
P := StreamTypes; { Current reg list }
While (P <> Nil) AND (P^.ObjType <> S.ObjType)
Do P := P^.Next; { Find end of chain }
If (P = Nil) AND (S.ObjType <> 0) Then Begin { Valid end found }
S.Next := StreamTypes; { Chain the list }
StreamTypes := @S; { We are now first }
End Else RegisterError; { Register the error }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ GENERAL FUNCTION INTERFACE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ LongMul -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 04Sep97 LdB }
{---------------------------------------------------------------------------}
FUNCTION LongMul (X, Y: Integer): LongInt;
BEGIN
LongMul:=Longint(X*Y);
END;
{---------------------------------------------------------------------------}
{ LongDiv -> Platforms DOS/DPMI/WINDOWS/OS2 - Checked 04Sep97 LdB }
{---------------------------------------------------------------------------}
FUNCTION LongDiv (X: LongInt; Y: Integer): Integer;
BEGIN
LongDiv := Integer(X DIV Y);
END;
END.
{
$Log$
Revision 1.34 2000-01-07 16:41:34 daniel
* copyright 2000
Revision 1.33 2000/01/07 16:32:24 daniel
* copyright 2000 added
Revision 1.32 1999/12/06 18:25:30 peter
* fixed vmtptr crash in tstream.put
Revision 1.31 1999/11/06 14:35:38 peter
* truncated log
Revision 1.30 1999/09/10 17:15:13 peter
* fixed freeall
Revision 1.29 1999/06/14 17:48:04 peter
* merged
Revision 1.28.2.1 1999/06/14 17:43:20 peter
* fixed lastthat
Revision 1.28 1999/02/25 21:25:26 peter
+ SetStr() function
Revision 1.27 1999/02/22 15:04:45 peter
* fixed typecasting in firstthat
Revision 1.26 1999/02/21 23:13:01 florian
* tpcompatible flags for tstream introduced, thanks to Matthias Koeppe
Revision 1.25 1999/01/22 10:21:55 peter
+ prect=^trect
Revision 1.24 1999/01/12 14:21:50 peter
* fixed TColletcion.AtInsert
Revision 1.23 1999/01/06 10:11:06 daniel
* Removed on more handle:=-1 statement
Revision 1.22 1998/12/30 10:26:16 peter
* reinserted old version, because daniel skipped 3 versions !!
Revision 1.19 1998/12/18 17:21:28 peter
* fixed firstthat,lastthat
Revision 1.18 1998/12/16 21:57:20 peter
* fixed currentframe,previousframe
+ testcall to test the callspec unit
Revision 1.17 1998/12/16 00:22:25 peter
* more temp symbols removed
Revision 1.16 1998/12/08 10:11:27 peter
* tpoint contains now sw_integer (needed to support 64k files in the
editor)
Revision 1.15 1998/11/26 14:41:22 michael
+ Fixed TREsourcefile.init
Revision 1.14 1998/11/24 17:11:22 peter
* made a real fpc only version, no platform.inc
* applied fixes from the mailinglist
+ included some routines from callspec
Revision 1.13 1998/11/16 10:21:24 peter
* fixes for H+
Revision 1.12 1998/11/12 11:54:50 peter
* fixed for 0.99.8
Revision 1.11 1998/11/12 11:45:09 peter
+ released object registration
Revision 1.10 1998/10/23 16:51:18 pierre
* vmtlink type changed to pointer
}
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