Lista de funciones indispensables en Delphi

{*******************************************************}
{                                                       }
{       xTool - Component Collection                    }
{                                                       }
{       Copyright (c) 1995 Stefan Böther                }
{                            stefc@fabula.com           }
{*******************************************************}
{
  Please look also for our xTools-Nails function toolkit.
  More information you'll find under
    http://ourworld.compuserve.com/homepages/stefc/xprocs.htm

  Any comments and enhancements are welcome, if the're
  sended to  stefc@fabula.com.

   21.02.96  added TMonth & TDay type                                Stefc
   22.02.96  added strFileLoad & strFileSave                         Stefc
   09.03.96  correct sysTempPath                                     Stefc
   09.03.96  added regXXXXX functions for access the registry        Stefc
   24.03.96  added IsWinNT constant                                  Stefc
   24.03.96  added SysMetric object                                  Stefc
   26.03.96  added dateQuicken for controling date input with keys   Stefc
   27.03.96  added TDesktopCanvas here                               Stefc
   28.03.96  added LoadDIBitmap                                      Stefc
   01.04.96  added Question function here                            Stefc
   09.04.96  added sysSaverRunning added                             Stefc
   12.04.96  added timeZoneOffset                                    Stefc
   12.04.96  added timeToInt                                         Stefc
   17.04.96  added strCmdLine                                        Stefc
   17.04.96  added rectBounds                                        Stefc
   17.04.96  added TPersistentRect class                             Stefc
   19.04.96  added strDebug method                                   Stefc
   21.04.96  changed TMonth added noneMonth                          km
   21.04.96  added licence callback                                  Stefc
   21.04.96  added strNiceDateDefault                                km
   21.04.96  added simple strEncrpyt & strDecrypt                    Stefc
   24.04.96  backport to 16 bit                                      Stefc
   24.04.96  added Information method                                Stefc
   24.04.96  use win messageBox with Win95 in Question & Information Stefc
   09.05.96  new function ExtractName                                Stefc
   10.05.96  Added TPersistentRegistry                               Stefc
   12.05.96  fileExec                                                Stefc
   14.05.96  New function Confirmation                               Stefc
   16.05.96  New function strChange                                  Stefc
   29.05.96  New functions comXXXXX                                  Stefc
   09.06.96  New function strSearchReplace                           km
   09.06.96  ported assembler strHash to plain pascal                Stefc
   15.06.96  new variables xLanguage & xLangOfs                      Stefc
   28.06.96  new method sysBeep                                      Stefc
   28.06.96  new method intPercent                                   Stefc
   10.07.96  make compatible with 16 Bit Delphi 1.0                  Stefc
   14.07.96  fileLongName & fileShortName defined                    Stefc
   15.07.96  Correct sysTempPath method                              Stefc
   21.07.96  New functions strContains & strContainsU                Stefc
   28.07.96  comIsCServe also check for xxx@compuServe.com           Stefc
   31.07.96  added strCapitalize after idea from Fred N. Read        Stefc
   04.08.96  strByteSize() now can also display Bytes                Stefc
   05.08.96  added regWriteShellExt()                                Stefc
   06.08.96  added sysColorDepth()                                   Stefc
   07.08.96  added strSoundex()                                      Stefc
}
unit xProcs;

interface

uses
 {$IFDEF Win32} Windows, Registry, ShellAPI, {$ELSE} WinTypes, WinProcs, {$ENDIF}
  Messages, Classes, Graphics;

type
  Float = Extended;    { our type for float arithmetic }

 {$IFDEF Win32}        { our type for integer functions, Int_ is ever 32 bit }
  Int_  = Integer;
 {$ELSE}
  Int_  = Longint;
 {$ENDIF}

const
  XCOMPANY        = 'Fabula Software';

const
  { several important ASCII codes }
  NULL            =  #0;
  BACKSPACE       =  #8;
  TAB             =  #9;
  LF              = #10;
  CR              = #13;
  EOF_            = #26;    { 30.07.96 sb }
  ESC             = #27;
  BLANK           = #32;
  SPACE           = BLANK;

  { digits as chars }
  ZERO   = '0';  ONE  = '1';  TWO    = '2';  THREE  = '3';  FOUR  = '4';
  FIVE   = '5';  SIX  = '6';  SEVEN  = '7';  EIGHT  = '8';  NINE  = '9';

  { special codes }
  SLASH           = '\';     { used in filenames }
  HEX_PREFIX      = '$';     { prefix for hexnumbers }

  CRLF            : PChar = CR+LF;

  { common computer sizes }
  KBYTE           = Sizeof(Byte) shl 10;
  MBYTE           = KBYTE        shl 10;
  GBYTE           = MBYTE        shl 10;

  { Low floating point value }
  FLTZERO         : Float = 0.00000001;


  DIGITS          : set of Char = [ZERO..NINE];

  { important registry keys / items }
  REG_CURRENT_VERSION = 'Software\Microsoft\Windows\CurrentVersion';
  REG_CURRENT_USER    = 'RegisteredOwner';
  REG_CURRENT_COMPANY = 'RegisteredOrganization';

  PRIME_16       = 65521;
  PRIME_32       = 2147483647;

  MINSHORTINT    = -128;               { 1.8.96 sb }
  MAXSHORTINT    =  127;
  MINBYTE        =  0;
  MAXBYTE        =  255;
  MINWORD        =  0;
  MAXWORD        =  65535;

type
  TMonth        = (NoneMonth,January,February,March,April,May,June,July,
                   August,September,October,November,December);

  TDayOfWeek    = (Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday);

  { Online eMail Service Provider }
  TMailProvider = (mpCServe, mpInternet, mpNone);

  TLicCallback  = function ( var Code: Integer): Integer;

  TBit          = 0..31;

  { Search and Replace options }
  TSROption     = (srWord,srCase,srAll);
  TSROptions    = set of TsrOption;

var
  IsWin95,
  IsWinNT   : Boolean;
  IsFabula  : TLicCallBack;

  xLanguage : Integer;
  xLangOfs  : Integer;

{ bit manipulating }
function bitSet(const Value: Int_; const TheBit: TBit): Boolean;
function bitOn(const Value: Int_; const TheBit: TBit): Int_;
function bitOff(const Value: Int_; const TheBit: TBit): Int_;
function bitToggle(const Value: Int_; const TheBit: TBit): Int_;

{ String functions }
function  strHash(const S: String; LastBucket: Integer): Integer;
function  strCut(const S: String; Len: Integer): String;
function  strTrim(const S: String): String;
function  strTrimA(const S: String): String;
function  strTrimChA(const S: String; C: Char): String;
function  strTrimChL(const S: String; C: Char): String;
function  strTrimChR(const S: String; C: Char): String;
function  strLeft(const S: String; Len: Integer): String;
function  strLower(const S: String): String;
function  strMake(C: Char; Len: Integer): String;
function  strPadChL(const S: String; C: Char; Len: Integer): String;
function  strPadChR(const S: String; C: Char; Len: Integer): String;
function  strPadChC(const S: String; C: Char; Len: Integer): String;
function  strPadL(const S: String; Len: Integer): String;
function  strPadR(const S: String; Len: Integer): String;
function  strPadC(const S: String; Len: Integer): String;
function  strPadZeroL(const S: String; Len: Integer): String;
procedure strChange(var S:String; const Source, Dest: String);
function  strRight(const S: String; Len: Integer): String;
function  strAddSlash(const S: String): String;
function  strDelSlash(const S: String): String;
function  strSpace(Len: Integer): String;
function  strToken(var S: String; Seperator: Char): String;
function  strTokenCount(S: String; Seperator: Char): Integer;
function  strTokenAt(const S:String; Seperator: Char; At: Integer): String;
function  strUpper(const S: String): String;
function  strOemAnsi(const S:String): String;
function  strAnsiOem(const S:String): String;
function  strEqual(const S1,S2: String): Boolean;
function  strComp(const S1,S2: String): Boolean;
function  strCompU(const S1,S2: String): Boolean;
function  strContains(const S1,S2: String): Boolean;
function  strContainsU(const S1,S2: String): Boolean;
function  strNiceNum(const S: String): String;
function  strNiceDateDefault(const S, Default: String): String;
function  strNiceDate(const S: String): String;
function  strNiceTime(const S: String): String;
function  strNicePhone(const S: String): String;
function  strReplace(const S: String; C: Char; const Replace: String): String;
function  strCmdLine: String;
function  strEncrypt(const S: String; Key: Word): String;
function  strDecrypt(const S: String; Key: Word): String;
function  strLastCh(const S: String): Char;
procedure strStripLast(var S: String);
function  strByteSize(Value: Longint): String;
function  strSoundex(S: String): String;
procedure strSearchReplace(var S:String; const Source, Dest: String; Options: TSRoptions);
function  strProfile(const aFile, aSection, aEntry, aDefault: String): String;
function  strCapitalize(const S: String): String;  { 31.07.96 sb }

{$IFDEF Win32}
procedure strDebug(const S: String);
function  strFileLoad(const aFile: String): String;
procedure strFileSave(const aFile,aString: String);
{$ENDIF}

{ Integer functions }
function  intCenter(a,b: Int_): Int_;
function  intMax(a,b: Int_): Int_;
function  intMin(a,b: Int_): Int_;
function  intPow(Base,Expo: Integer): Int_;
function  intPow10(Exponent: Integer): Int_;
function  intSign(a: Int_): Integer;
function  intZero(a: Int_; Len: Integer): String;
function  intPrime(Value: Integer): Boolean;
function  intPercent(a, b: Int_): Int_;

{ Floatingpoint functions }
function  fltAdd(P1,P2: Float; Decimals: Integer): Float;
function  fltDiv(P1,P2: Float; Decimals: Integer): Float;
function  fltEqual(P1,P2: Float; Decimals: Integer): Boolean;
function  fltEqualZero(P: Float): Boolean;
function  fltGreaterZero(P: Float): Boolean;
function  fltLessZero(P: Float): Boolean;
function  fltNeg(P: Float; Negate: Boolean): Float;
function  fltMul(P1,P2: Float; Decimals: Integer): Float;
function  fltRound(P: Float; Decimals: Integer): Float;
function  fltSub(P1,P2: Float; Decimals: Integer): Float;
function  fltUnEqualZero(P: Float): Boolean;
function  fltCalc(const Expr: String): Float;
function  fltPower(a,n: Float): Float;

{ Rectangle functions from Golden Software }
function  rectHeight(const R: TRect): Integer;
function  rectWidth(const R: TRect): Integer;
procedure rectGrow(var R: TRect; Delta: Integer);
procedure rectRelativeMove(var R: TRect; DX, DY: Integer);
procedure rectMoveTo(var R: TRect; X, Y: Integer);
function  rectSet(Left, Top, Right, Bottom: Integer): TRect;
function  rectInclude(const R1, R2: TRect): Boolean;
function  rectPoint(const R: TRect; P: TPoint): Boolean;
function  rectSetPoint(const TopLeft, BottomRight: TPoint): TRect;
function  rectIntersection(const R1, R2: TRect): TRect;
function  rectIsIntersection(const R1, R2: TRect): Boolean;
function  rectIsValid(const R: TRect): Boolean;
function  rectsAreValid(const Arr: array of TRect): Boolean;
function  rectNull: TRect;
function  rectIsNull(const R: TRect): Boolean;
function  rectIsSquare(const R: TRect): Boolean;
function  rectCentralPoint(const R: TRect): TPoint;
function  rectBounds(aLeft,aTop,aWidth,aHeight: Integer): TRect;

{ date functions }
function  dateYear(D: TDateTime): Integer;
function  dateMonth(D: TDateTime): Integer;
function  dateDay(D: TDateTime): Integer;
function  dateBeginOfYear(D: TDateTime): TDateTime;
function  dateEndOfYear(D: TDateTime): TDateTime;
function  dateBeginOfMonth(D: TDateTime): TDateTime;
function  dateEndOfMonth(D: TDateTime): TDateTime;
function  dateWeekOfYear(D: TDateTime): Integer;
function  dateDayOfYear(D: TDateTime): Integer;
function  dateDayOfWeek(D: TDateTime): TDayOfWeek;
function  dateLeapYear(D: TDateTime): Boolean;
function  dateBeginOfQuarter(D: TDateTime): TDateTime;
function  dateEndOfQuarter(D: TDateTime): TDateTime;
function  dateBeginOfWeek(D: TDateTime;Weekday: Integer): TDateTime;
function  dateDaysInMonth(D: TDateTime): Integer;
function  dateQuicken(D: TDateTime; Key: Char): TDateTime;

{ time functions }
function  timeHour(T: TDateTime): Integer;
function  timeMin(T: TDateTime): Integer;
function  timeSec(T: TDateTime): Integer;
function  timeToInt(T: TDateTime): Integer;

{$IFDEF Win32}
function  timeZoneOffset: Integer;
{$ENDIF}

{ com Functions }
function  comIsCis(const S: String): Boolean;
function  comIsInt(const S: String): Boolean;
function  comCisToInt(const S: String): String;
function  comIntToCis(const S: String): String;
function  comFaxToCis(const S: String): String;
function  comNormFax(const Name,Fax: String): String;
function  comNormPhone(const Phone: String): String;
function  comNormInt(const Name,Int: String): String;
function  comNormCis(const Name,Cis: String): String;

{ file functions }
procedure fileShredder(const Filename: String);
function  fileSize(const Filename: String): Longint;
function  fileWildcard(const Filename: String): Boolean;

{$IFDEF Win32}
function  fileTemp(const aExt: String): String;
function  fileExec(const aCmdLine: String; aHide, aWait: Boolean): Boolean;
function  fileLongName(const aFile: String): String;
function  fileShortName(const aFile: String): String;
function  fileShellOpen(const aFile: String): Boolean;
function  fileShellPrint(const aFile: String): Boolean;
{$ENDIF}
function  ExtractName(const Filename: String): String;

{ system functions }
function  sysTempPath:String;
procedure sysDelay(aMs: Longint);
procedure sysBeep;
function  sysColorDepth: Integer;    { 06.08.96 sb }

{$IFDEF Win32}
procedure sysSaverRunning(Active: Boolean);
{$ENDIF}

{ registry functions }

{$IFDEF Win32}
function  regReadString(aKey: hKey; const Path: String): String;
procedure regWriteString(aKey: hKey; const Path,Value: String);
function  regInfoString(const Value: String): String;
function  regCurrentUser: String;
function  regCurrentCompany: String;
procedure regWriteShellExt(const aExt,aCmd,aMenu,aExec: String);
{$ENDIF}

{ several functions }
function  Question(const Msg: String):Boolean;
procedure Information(const Msg: String);
function  Confirmation(const Msg: String): Word;

type
  { TRect that can be used persistent as property for components }
  TUnitConvertEvent = function (Sender: TObject;
    Value: Integer; Get: Boolean): Integer of object;

  TPersistentRect = class(TPersistent)
  private
    FRect      : TRect;
    FOnConvert : TUnitConvertEvent;
    procedure SetLeft(Value: Integer);
    procedure SetTop(Value: Integer);
    procedure SetHeight(Value: Integer);
    procedure SetWidth(Value: Integer);
    function  GetLeft: Integer;
    function  GetTop: Integer;
    function  GetHeight: Integer;
    function  GetWidth: Integer;
  public
    constructor Create;
    procedure Assign(Source: TPersistent); override;
    property Rect: TRect read FRect;
    property OnConvert: TUnitConvertEvent read FOnConvert write FOnConvert;
  published
    property Left  : Integer read GetLeft   write SetLeft;
    property Top   : Integer read GetTop    write SetTop;
    property Height: Integer read GetHeight write SetHeight;
    property Width : Integer read GetWidth  write SetWidth;
  end;

{$IFDEF Win32}
  { Persistent access of components from the registry }
  TPersistentRegistry = class(TRegistry)
  public
    function  ReadComponent(const Name: String; Owner, Parent: TComponent): TComponent;
    procedure WriteComponent(const Name: String; Component: TComponent);
  end;
{$ENDIF

  { easy access of the system metrics }
  TSystemMetric = class
  private
    FColorDepth,
    FMenuHeight,
    FCaptionHeight : Integer;
    FBorder,
    FFrame,
    FDlgFrame,
    FBitmap,
    FHScroll,
    FVScroll,
    FThumb,
    FFullScreen,
    FMin,
    FMinTrack,
    FCursor,
    FIcon,
    FDoubleClick,
    FIconSpacing : TPoint;
  protected
    constructor Create;
    procedure Update;
  public
    property MenuHeight: Integer read FMenuHeight;
    property CaptionHeight: Integer read FCaptionHeight;
    property Border: TPoint read FBorder;
    property Frame: TPoint read FFrame;
    property DlgFrame: TPoint read FDlgFrame;
    property Bitmap: TPoint read FBitmap;
    property HScroll: TPoint read FHScroll;
    property VScroll: TPoint read FVScroll;
    property Thumb: TPoint read FThumb;
    property FullScreen: TPoint read FFullScreen;
    property Min: TPoint read FMin;
    property MinTrack: TPoint read FMinTrack;
    property Cursor: TPoint read FCursor;
    property Icon: TPoint read FIcon;
    property DoubleClick: TPoint read FDoubleClick;
    property IconSpacing: TPoint read FIconSpacing;
    property ColorDepth: Integer read FColorDepth;
  end;

var
  SysMetric: TSystemMetric;

type
  TDesktopCanvas = class(TCanvas)
  private
    DC           : hDC;
  public
    constructor  Create;
    destructor   Destroy; override;
  end;

implementation

uses
  SysUtils, Controls, Forms, Consts, Dialogs;

{ bit manipulating }
function bitSet(const Value: Int_; const TheBit: TBit): Boolean;
begin
  Result:= (Value and (1 shl TheBit)) <> 0;
end;

function bitOn(const Value: Int_; const TheBit: TBit): Int_;
begin
  Result := Value or (1 shl TheBit);
end;

function bitOff(const Value: Int_; const TheBit: TBit): Int_;
begin
  Result := Value and ((1 shl TheBit) xor $FFFFFFFF);
end;

function bitToggle(const Value: Int_; const TheBit: TBit): Int_;
begin
  result := Value xor (1 shl TheBit);
end;

{ string methods }

function strHash(const S: String; LastBucket: Integer): Integer;
var
  i: Integer;
begin
  Result:=0;
  for i := 1 to Length(S) do
    Result := ((Result shl 3) xor Ord(S[i])) mod LastBucket;
end;

function strTrim(const S: String): String;
begin
  Result:=StrTrimChR(StrTrimChL(S,BLANK),BLANK);
end;

function strTrimA(const S: String): String;
begin
  Result:=StrTrimChA(S,BLANK);
end;

function strTrimChA(const S: String; C: Char): String;
var
  I               : Word;
begin
  Result:=S;
  for I:=Length(Result) downto 1 do
    if Result[I]=C then Delete(Result,I,1);
end;

function strTrimChL(const S: String; C: Char): String;
begin
  Result:=S;
  while (Length(Result)>0) and (Result[1]=C) do Delete(Result,1,1);
end;

function strTrimChR(const S: String; C: Char): String;
begin
  Result:=S;
  while (Length(Result)> 0) and (Result[Length(Result)]=C) do
    Delete(Result,Length(Result),1);
end;

function strLeft(const S: String; Len: Integer): String;
begin
  Result:=Copy(S,1,Len);
end;

function strLower(const S: String): String;
begin
  Result:=AnsiLowerCase(S);
end;

function strMake(C: Char; Len: Integer): String;
begin
  Result:=strPadChL('',C,Len);
end;

function strPadChL(const S: String; C: Char; Len: Integer): String;
begin
  Result:=S;
  while Length(Result)<Len do Result:=C+Result;
end;

function strPadChR(const S: String; C: Char; Len: Integer): String;
begin
  Result:=S;
  while Length(Result)<Len do Result:=Result+C;
end;

function strPadChC(const S: String; C: Char; Len: Integer): String;
begin
  Result:=S;
  while Length(Result)<Len do
  begin
    Result:=Result+C;
    if Length(Result)<Len then Result:=C+Result;
  end;
end;

function strPadL(const S: String; Len: Integer): String;
begin
  Result:=strPadChL(S,BLANK,Len);
end;

function strPadC(const S: String; Len: Integer): String;
begin
  Result:=strPadChC(S,BLANK,Len);
end;


function strPadR(const S: String; Len: Integer): String;
begin
  Result:=strPadChR(S,BLANK,Len);
end;

function strPadZeroL(const S: String; Len: Integer): String;
begin
  Result:=strPadChL(strTrim(S),ZERO,Len);
end;

function strCut(const S: String; Len: Integer): String;
begin
  Result:=strLeft(strPadR(S,Len),Len);
end;

function strRight(const S: String; Len: Integer): String;
begin
  if Len>=Length(S) then
    Result:=S
  else
    Result:=Copy(S,Succ(Length(S))-Len,Len);
end;

function strAddSlash(const S: String): String;
begin
  Result:=S;
  if strLastCh(Result)<>SLASH then Result:=Result+SLASH;
end;

function strDelSlash(const S: String): String;
begin
  Result:=S;
  if strLastCh(Result)=SLASH then Delete(Result,Length(Result),1);
end;

function strSpace(Len: Integer): String;
begin
  Result:=StrMake(BLANK,Len);
end;

function strToken(var S: String; Seperator: Char): String;
var
  I               : Word;
begin
  I:=Pos(Seperator,S);
  if I<>0 then
  begin
    Result:=System.Copy(S,1,I-1);
    System.Delete(S,1,I);
  end else
  begin
    Result:=S;
    S:='';
  end;
end;

function strTokenCount(S: String; Seperator: Char): Integer;
begin
  Result:=0;
  while StrToken(S,Seperator)<>'' do Inc(Result);
end;

function strTokenAt(const S:String; Seperator: Char; At: Integer): String;
var
  j,i: Integer;
begin
  Result:='';
  j := 1;
  i := 0;
  while (i<=At ) and (j<=Length(S)) do
  begin
    if S[j]=Seperator then
       Inc(i)
    else if i = At then
       Result:=Result+S[j];
    Inc(j);
  end;
end;

function strUpper(const S: String): String;
begin
  Result:=AnsiUpperCase(S);
end;

function strOemAnsi(const S:String):String;
begin
 {$IFDEF Win32}
  SetLength(Result,Length(S));
 {$ELSE}
  Result[0]:=Chr(Length(S));
 {$ENDIF}
  OemToAnsiBuff(@S[1],@Result[1],Length(S));
end;

function strAnsiOem(const S:String): String;
begin
 {$IFDEF Win32}
  SetLength(Result,Length(S));
 {$ELSE}
  Result[0]:=Chr(Length(S));
 {$ENDIF}
  AnsiToOemBuff(@S[1],@Result[1],Length(S));
end;

function strEqual(const S1,S2: String): Boolean;
begin
  Result:=AnsiCompareText(S1,S2)=0;
end;

function strCompU(const S1,S2: String) : Boolean;
begin
  Result:=strEqual(strLeft(S2,Length(S1)),S1);
end;

function strComp(const S1,S2: String) : Boolean;
begin
  Result:=strLeft(S2,Length(S1))=S1;
end;

function strContains(const S1,S2: String): Boolean;
begin
  Result:=Pos(S1,S2) > 0;
end;

function strContainsU(const S1,S2: String): Boolean;
begin
  Result:=strContains(strUpper(S1),strUpper(S2));
end;

function strNiceNum(const S: String) : String;
var
  i    : Integer;
  Seps : set of Char;
begin
  Seps:=[ThousandSeparator,DecimalSeparator];
  Result:= ZERO;
  for i := 1 to Length(S) do
    if S[i] in DIGITS + Seps then
    begin
      if S[i] = ThousandSeparator then
         Result:=Result+DecimalSeparator
      else
         Result:=Result+S[i];
      if S[i] In Seps then Seps:=[];
    end
end;

function strNiceDate(const S: String): String;
begin
  Result:=strNiceDateDefault(S, DateToStr(Date));
end;

function  strNiceDateDefault(const S, Default: String): String;
(* sinn der Procedure:
   Irgendeinen String übergeben und in ein leidlich brauchbares Datum verwandeln.
   Im Wesentlichen zum Abfangen des Kommazeichens auf dem Zehnerfeld.
   eingabe 10 = Rückgabe 10 des Laufenden Monats
   eingabe 10.12 = Rückgabe des 10.12. des laufenden Jahres.
   eingabe 10.12.96 = Rückgabe des Strings
   eingabe 10,12,96 = Rückgabe 10.12.95 (wird dann won STRtoDATE() gefressen)
   Eine Plausbilitätskontrolle des Datums findet nicht Statt.
   Geplante Erweiterung:
   eingabe: +14  = Rückgabe 14 Tage Weiter
   eingabe: +3m  = Rückgabe 3 Monate ab Heute
   eingabe: +3w  = Rückgabe 3 Wochen (3*7 Tage) ab Heute
   Das gleiche auch Rückwärts mit  Minuszeichen
   eingabe: e oder E oder f  = Nächster Erster
   eingabe: e+1m Erster des übernächsten Monats
   Da läßt sich aber noch trefflich weiterspinnen

   EV. mit Quelle rausgeben, damit sich die Engländer und Franzosen an
   Ihren Datumsformaten selbst erfreuen können und wir die passenden umsetzungen
   bekommen. *)
var
  a        : array [0..2] of string[4];
  heute    : string;
  i,j      : integer;
begin
  a[0]:='';
  a[1]:='';
  a[2]:='';
  heute := Default;

  j := 0;
  for i := 0 to length(S) do
    if S[i] in DIGITS then
      a[j] := a[j]+S[i]
    else if S[i] in [DateSeparator] then Inc(j);
  for i := 0 to 2 do
  if Length(a[i]) = 0 then
    if I=2 then
      a[i] :=copy(heute,i*3+1,4)
    else
      a[i] := copy(heute,i*3+1,2)
  else
    if length(a[i]) = 1 then
      a[i] := '0'+a[i];

  Result:=a[0]+DateSeparator+a[1]+DateSeparator+a[2];
  try
    StrToDate(Result);
  except
    Result:=DateToStr(Date);
  end;
end;

function strNiceTime(const S: String): String;
var
  a   : array[0..2] of string[2];
  i,j : integer;
begin
  j:= 0;
  a[0]:= '';
  a[1]:='';
  a[2]:='';
  for i:= 1 to length(S) do
  begin
    if S[i] in DIGITS then
    begin
      a[j] := a[j]+S[i];
    end
    else if S[i] in ['.',',',':'] then
      inc(J);
    if j > 2 then exit;
  end;
  for J := 0 to 2 do
    if length(a[j]) = 1 then a[j] := '0'+a[j] else
    if length(a[j]) = 0 then a[j] := '00';
  Result := a[0]+TimeSeparator+a[1]+TimeSeparator+a[2];
end;

function strNicePhone(const S: String): String;
var
  L : Integer;
begin
  if Length(S) > 3 then
  begin
    L:=(Length(S)+1) div 2;
    Result:=strNicePhone(strLeft(S,L))+SPACE+strNicePhone(strRight(S,Length(S)-L));
  end else
    Result := S;
end;

function strReplace(const S: String; C: Char; const Replace: String): String;
var
  i : Integer;
begin
  Result:='';
  for i:=Length(S) downto 1 do
    if S[i]=C then Result:=Replace+Result
              else Result:=S[i]+Result;
end;

procedure strChange(var S:String; const Source, Dest: String);
var
  P : Integer;
begin
  P:=Pos(Source,S);
  while P<>0 do
  begin
    Delete(S,P,Length(Source));
    Insert(Dest,S,P);
    P:=Pos(Source,S);
  end;
end;

function strCmdLine: String;
var
  i: Integer;
begin
  Result:='';
  for i:=1 to ParamCount do Result:=Result+ParamStr(i)+' ';
  Delete(Result,Length(Result),1);
end;

{ sends a string to debug windows inside the IDE }
{$IFDEF Win32}
procedure strDebug(const S: String);
var
  P    : PChar;
  CPS  : TCopyDataStruct;
  aWnd : hWnd;
begin
  aWnd := FindWindow('TfrmDbgTerm', nil);
  if aWnd <> 0 then
  begin
    CPS.cbData := Length(S) + 2;
    GetMem(P, CPS.cbData);
    try
      StrPCopy(P, S+CR);
      CPS.lpData := P;
      SendMessage(aWnd, WM_COPYDATA, 0, LParam(@CPS));
    finally
      FreeMem(P, Length(S)+2);
    end;
  end;
end;
{$ENDIF}

function strSoundex(S: String): String;
const
  CvTable : array['B'..'Z'] of char = (
    '1', '2', '3', '0', '1',   {'B' .. 'F'}
    '2', '0', '0', '2', '2',   {'G' .. 'K'}
    '4', '5', '5', '0', '1',   {'L' .. 'P'}
    '2', '6', '2', '3', '0',   {'Q' .. 'U'}
    '1', '0', '2', '0', '2' ); {'V' .. 'Z'}
var
  i,j : Integer;
  aGroup,Ch  : Char;

  function Group(Ch: Char): Char;
  begin
    if (Ch in ['B' .. 'Z']) and not (Ch In ['E','H','I','O','U','W','Y']) then
       Result:=CvTable[Ch]
    else
       Result:='0';
  end;

begin
  Result := '000';
  if S='' then exit;

  S:= strUpper(S);
  i:= 2;
  j:= 1;
  while (i <= Length(S)) and ( j<=3) do
  begin
    Ch := S[i];
    aGroup := Group(Ch);
    if (aGroup <> '0') and (Ch <> S[i-1]) and
       ((J=1) or (aGroup <> Result[j-1])) and
       ((i>2) or (aGroup <> Group(S[1]))) then
    begin
      Result[j] :=aGroup;
      Inc(j);
    end;
    Inc(i);
  end; {while}

  Result:=S[1]+'-'+Result;
end;

function strByteSize(Value: Longint): String;

  function FltToStr(F: Extended): String;
  begin
    Result:=FloatToStrF(Round(F),ffNumber,6,0);
  end;

begin
  if Value > GBYTE then
    Result:=FltTostr(Value / GBYTE)+' GB'
  else if Value > MBYTE then
    Result:=FltToStr(Value / MBYTE)+' MB'
  else if Value > KBYTE then
    Result:=FltTostr(Value / KBYTE)+' KB'
  else
    Result:=FltTostr(Value / KBYTE)+' Byte';   { 04.08.96 sb }
end;

const
  C1 = 52845;
  C2 = 22719;

function strEncrypt(const S: String; Key: Word): String;
var
  I: Integer;
begin
 {$IFDEF Win32}
  SetLength(Result,Length(S));
 {$ELSE}
   Result[0]:=Chr(Length(S));
 {$ENDIF}
  for I := 1 to Length(S) do begin
    Result[I] := Char(Ord(S[I]) xor (Key shr 8));
    Key := (Ord(Result[I]) + Key) * C1 + C2;
  end;
end;

function strDecrypt(const S: String; Key: Word): String;
var
  I: Integer;
begin
 {$IFDEF Win32}
  SetLength(Result,Length(S));
 {$ELSE}
   Result[0]:=Chr(Length(S));
 {$ENDIF}
  for I := 1 to Length(S) do begin
    Result[I] := char(Ord(S[I]) xor (Key shr 8));
    Key := (Ord(S[I]) + Key) * C1 + C2;
  end;
end;

function  strLastCh(const S: String): Char;
begin
  Result:=S[Length(S)];
end;

procedure strStripLast(var S: String);
begin
  if Length(S) > 0 then Delete(S,Length(S),1);
end;

procedure strSearchReplace(var S:String; const Source, Dest: String; Options: TSRoptions);
var hs,hs1,hs2,hs3: String;
var i,j : integer;

begin
 if  srCase in Options then
  begin
   hs := s;
   hs3 := source;
  end
 else
  begin
   hs:= StrUpper(s);
   hs3 := StrUpper(Source);
  end;
 hs1:= '';
 I:= pos(hs3,hs);
 j := length(hs3);
 while i > 0 do
 begin
   delete(hs,1,i+j-1); {Anfang Rest geändert 8.7.96 KM}
   hs1 := Hs1+copy(s,1,i-1); {Kopieren geändert 8.7.96 KM}
   delete(s,1,i-1); {Löschen bis Anfang posgeändert 8.7.96 KM}
   hs2 := copy(s,1,j); {Bis ende pos Sichern}
   delete(s,1,j); {Löschen bis ende Pos}
   if    (not (srWord in Options))
       or (pos(s[1],' .,:;-#''+*?=)(/&%$§"!{[]}\~<>|') > 0) then
    begin
     {Quelle durch ziel erstzen}
     hs1 := hs1+dest;
    end
   else
    begin
     hs1 := hs1+hs2;
    end;
   if srall in options then
    I:= pos(hs3,hs)
   else
    i :=0;
  end;
  s:= hs1+s;
end;

function  strProfile(const aFile, aSection, aEntry, aDefault: String): String;
var
  aTmp: array[0..255] of Char;
begin
 {$IFDEF Win32}
   GetPrivateProfileString(PChar(aSection), PChar(aEntry),
      PChar(aDefault), aTmp, Sizeof(aTmp)-1, PChar(aFile));
   Result:=StrPas(aTmp);
 {$ENDIF}
end;

function strCapitalize(const S: String): String;  { 31.07.96 sb }
var
  i      : Integer;
  Ch     : Char;
  First  : Boolean;
begin
  First  := True;
  Result := '';
  for i:=1 to Length(S) do
  begin
    Ch:=S[i];
    if Ch in [SPACE,'-','.'] then
       First:=True
    else if First then
    begin
      Ch:=strUpper(Ch)[1];
      First:=False;
    end;
    Result:=Result+Ch;
  end;
end;

{$IFDEF Win32}
function strFileLoad(const aFile: String): String;
var
  aStr : TStrings;
begin
  Result:='';
  aStr:=TStringList.Create;
  try
    aStr.LoadFromFile(aFile);
    Result:=aStr.Text;
  finally
    aStr.Free;
  end;
end;

procedure strFileSave(const aFile,aString: String);
var
  Stream: TStream;
begin
  Stream := TFileStream.Create(aFile, fmCreate);
  try
    Stream.WriteBuffer(Pointer(aString)^,Length(aString));
  finally
    Stream.Free;
  end;
end;
{$ENDIF}

{ Integer stuff }

function IntCenter(a,b: Int_): Int_;
begin
  Result:=a div 2 - b div 2;
end;

function IntMax(a,b: Int_): Int_;
begin
  if a>b then Result:=a else Result:=b;
end;

function IntMin(a,b: Int_): Int_;
begin
  if a<b then Result:=a else Result:=b;
end;

function IntPow(Base,Expo: Integer): Int_;
var
  Loop             : Word;
begin
  Result:=1;
  for Loop:=1 to Expo do Result:=Result*Base;
end;

function IntPow10(Exponent: Integer): Int_;
begin
  Result:=IntPow(10,Exponent);
end;

function IntSign(a: Int_): Integer;
begin
  if a<0 then Result:=-1 else if a>0 then Result:=+1 else Result:= 0;
end;

function IntZero(a: Int_; Len: Integer): String;
begin
  Result:=strPadZeroL(IntToStr(a),Len);
end;

function IntPrime(Value: Integer): Boolean;
var
  i : integer;
begin
  Result:=False;
  if Value mod 2 <> 0 then
  begin
    i := 1;
    repeat
      i := i + 2;
      Result:= Value mod i = 0
    until Result or ( i > Trunc(sqrt(Value)) );
    Result:= not Result;
  end;
end;

function IntPercent(a, b : Int_): Int_;
begin
  Result := Trunc((a / b)*100);
end;

{ Floating point stuff }

function FltAdd(P1,P2: Float; Decimals: Integer): Float;
begin
  P1    :=fltRound(P1,Decimals);
  P2    :=fltRound(P2,Decimals);
  Result:=fltRound(P1+P2,Decimals);
end;

function FltDiv(P1,P2: Float; Decimals: Integer): Float;
begin
  P1:=fltRound(P1,Decimals);
  P2:=fltRound(P2,Decimals);
  if P2=0.0 then P2:=FLTZERO;       { provide division by zero }
  Result:=fltRound(P1/P2,Decimals);
end;

function FltEqual(P1,P2: Float; Decimals: Integer): Boolean;
var
  Diff            : Float;
begin
  Diff:=fltSub(P1,P2,Decimals);
  Result:=fltEqualZero(Diff);
end;

function FltEqualZero(P: Float): Boolean;
begin
  Result:=(P>-FLTZERO) and (P<FLTZERO);
end;

function FltGreaterZero(P: Float): Boolean;
begin
  Result:=P>FLTZERO;
end;

function FltLessZero(P: Float): Boolean;
begin
  Result:=P<- font="">FLTZERO;
end;

function FltNeg(P: Float; Negate: Boolean): Float;
begin
  if Negate then Result:=-P else Result:=P;
end;

function FltMul(P1,P2: Float; Decimals: Integer): Float;
begin
  P1    :=fltRound(P1,Decimals);
  P2    :=fltRound(P2,Decimals);
  Result:=fltRound(P1*P2,Decimals);
end;

function FltRound(P: Float; Decimals: Integer): Float;
var
  Factor  : LongInt;
  Help    : Float;
begin
  Factor:=IntPow10(Decimals);
  if P<0 then Help:=-0.5 else Help:=0.5;
  Result:=Int(P*Factor+Help)/Factor;
  if fltEqualZero(Result) then Result:=0.00;
end;

function FltSub(P1,P2: Float; Decimals: Integer): Float;
begin
  P1    :=fltRound(P1,Decimals);
  P2    :=fltRound(P2,Decimals);
  Result:=fltRound(P1-P2,Decimals);
end;

function FltUnEqualZero(P: Float): Boolean;
begin
  Result:=(P<- font="">FLTZERO) or (P>FLTZERO)
end;

function FltCalc(const Expr: String): Float;
const
  STACKSIZE = 10;
var
  Stack   : array[0..STACKSIZE] of double;
  oStack  : array[0..STACKSIZE] of char;
  z,n     : double;
  i,j,m   : integer;
  Bracket : boolean;
begin
  Bracket:= False; j := 0; n:= 1;z:=0; m:=1;
  for i := 1 to Length(Expr) do
  begin
    if not Bracket  then
       case Expr[i] of
         '0' .. '9': begin
                       z:=z*10+ord(Expr[i])-ord('0');
                       n:=n*m;
                     end;
         ',',#46   : m := 10;
         '('       : Bracket := True; {hier Klammeranfang merken, Zähler!!}
         '*','x',
         'X',
         '/','+'   : begin
                       Stack[j] := z/n;
                       oStack[j] := Expr[i];
                       Inc(j);
                       m:=1;z:=0;n:=1;
                     end;
       end {case}
    else
       Bracket:= Expr[i]<> ')'; {hier Rekursiver Aufruf, Zähler !!};
  end;
  Stack[j] := z/n;
  for i := 1 to j do
    case oStack[i-1] of
      '*','x','X' :  Stack[i]:= Stack[i-1]*Stack[i];
      '/'         :  Stack[i]:= Stack[i-1]/Stack[i];
      '+'         :  Stack[i]:= Stack[i-1]+Stack[i];
    end;
  Result:= Stack[j];
end;

function fltPower(a, n: Float): Float;
begin
  Result:=Exp(n * Ln(a));
end;

{ Rectangle Calculations }

function RectHeight(const R: TRect): Integer;
begin
  Result := R.Bottom - R.Top;
end;

function RectWidth(const R: TRect): Integer;
begin
  Result := R.Right - R.Left;
end;

procedure RectGrow(var R: TRect; Delta: Integer);
begin
  with R do
  begin
    Dec(Left, Delta);
    Dec(Top, Delta);
    Inc(Right, Delta);
    Inc(Bottom, Delta);
  end;
end;

procedure RectRelativeMove(var R: TRect; DX, DY: Integer);
begin
  with R do
  begin
    Inc(Left, DX);
    Inc(Right, DX);
    Inc(Top, DY);
    Inc(Bottom, DY);
  end;
end;

procedure RectMoveTo(var R: TRect; X, Y: Integer);
begin
  with R do
  begin
    Right := X + Right - Left;
    Bottom := Y + Bottom - Top;
    Left := X;
    Top := Y;
  end;
end;

function RectSet(Left, Top, Right, Bottom: Integer): TRect;
begin
  Result.Left := Left;
  Result.Top := Top;
  Result.Right := Right;
  Result.Bottom := Bottom;
end;

function RectSetPoint(const TopLeft, BottomRight: TPoint): TRect;
begin
  Result.TopLeft := TopLeft;
  Result.BottomRight := BottomRight;
end;

function RectInclude(const R1, R2: TRect): Boolean;
begin
  Result := (R1.Left >= R2.Left) and (R1.Top >= R2.Top)
    and (R1.Right <= R2.Right) and (R1.Bottom <= R2.Bottom);
end;

function  RectPoint(const R: TRect; P: TPoint): Boolean;
begin
  Result := (p.x>r.left) and (p.x<r.right) and (p.y>r.top) and (p.y<r.bottom);
end;

function RectIntersection(const R1, R2: TRect): TRect;
begin
  with Result do
  begin
    Left := intMax(R1.Left, R2.Left);
    Top := intMax(R1.Top, R2.Top);
    Right := intMin(R1.Right, R2.Right);
    Bottom := intMin(R1.Bottom, R2.Bottom);
  end;

  if not RectIsValid(Result) then
    Result := RectSet(0, 0, 0, 0);
end;

function RectIsIntersection(const R1, R2: TRect): Boolean;
begin
  Result := not RectIsNull(RectIntersection(R1, R2));
end;

function RectIsValid(const R: TRect): Boolean;
begin
  with R do
    Result := (Left <= Right) and (Top <= Bottom);
end;

function RectsAreValid(const Arr: array of TRect): Boolean;
var
  I: Integer;
begin
  for I := Low(Arr) to High(Arr) do
    if not RectIsValid(Arr[I]) then
    begin
      Result := False;
      exit;
    end;
  Result := True;
end;

function RectNull: TRect;
begin
  Result := RectSet(0, 0, 0, 0);
end;

function RectIsNull(const R: TRect): Boolean;
begin
  with R do
    Result := (Left = 0) and (Right = 0) and (Top = 0) and (Bottom = 0);
end;

function RectIsSquare(const R: TRect): Boolean;
begin
  Result := RectHeight(R) = RectWidth(R);
end;

function RectCentralPoint(const R: TRect): TPoint;
begin
  Result.X := R.Left + (RectWidth(R) div 2);
  Result.Y := R.Top + (RectHeight(R) div 2);
end;

function  rectBounds(aLeft,aTop,aWidth,aHeight: Integer): TRect;
begin
  Result:=rectSet(aLeft,aTop,aLeft+aWidth,aTop+aHeight);
end;


{ file functions }

procedure fileShredder(const Filename: String);
var
  aFile : Integer;
  aSize : Integer;
  P     : Pointer;
begin
  aSize:=fileSize(Filename);
  aFile:=FileOpen(FileName,fmOpenReadWrite);
  try
    Getmem(P,aSize);
    fillchar(P^,aSize,'X');
    FileWrite(aFile,P^,aSize);
    Freemem(P,aSize);
  finally
    FileClose(aFile);
    DeleteFile(Filename);
  end;
end;

function fileSize(const FileName: String): LongInt;
var
  SearchRec       : TSearchRec;
begin                                       { !Win32! -> GetFileSize }
  if FindFirst(FileName,faAnyFile,SearchRec)=0
    then Result:=SearchRec.Size
    else Result:=0;
end;

function fileWildcard(const Filename: String): Boolean;
begin
  Result:=(Pos('*',Filename)<>0) or (Pos('?',Filename)<>0);
end; 

{$IFDEF Win32}
function fileTemp(const aExt: String): String;
var
  Buffer: array[0..1023] of Char;
  aFile : String;
begin
  GetTempPath(Sizeof(Buffer)-1,Buffer);
  GetTempFileName(Buffer,'TMP',0,Buffer);
  SetString(aFile, Buffer, StrLen(Buffer));
  Result:=ChangeFileExt(aFile,aExt);
  RenameFile(aFile,Result);
end;

function fileExec(const aCmdLine: String; aHide, aWait: Boolean): Boolean;
var
  StartupInfo : TStartupInfo;
  ProcessInfo : TProcessInformation;
begin
  {setup the startup information for the application }
  FillChar(StartupInfo, SizeOf(TStartupInfo), 0);
  with StartupInfo do
  begin
    cb:= SizeOf(TStartupInfo);
    dwFlags:= STARTF_USESHOWWINDOW or STARTF_FORCEONFEEDBACK;
    if aHide then wShowWindow:= SW_HIDE
             else wShowWindow:= SW_SHOWNORMAL;
  end;

  Result := CreateProcess(nil,PChar(aCmdLine), nil, nil, False,
               NORMAL_PRIORITY_CLASS, nil, nil, StartupInfo, ProcessInfo);
  if aWait then
     if Result then
     begin
       WaitForInputIdle(ProcessInfo.hProcess, INFINITE);
       WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
     end;
end;

function fileShellOpen(const aFile: String): Boolean;
begin
  Result := ShellExecute( Application.Handle,
    'open', PChar(aFile), nil, nil, SW_NORMAL) <= 32;
end;

function fileShellPrint(const aFile: String): Boolean;
begin
  Result := ShellExecute( Application.Handle,
    'print', PChar(aFile), nil, nil, SW_HIDE) <= 32;
end;

function  fileLongName(const aFile: String): String;
var
  aInfo: TSHFileInfo;
begin
  if SHGetFileInfo(PChar(aFile),0,aInfo,Sizeof(aInfo),SHGFI_DISPLAYNAME)<>0 then
     Result:=StrPas(aInfo.szDisplayName)
  else
     Result:=aFile;
end;

function  fileShortName(const aFile: String): String;
var
  aTmp: array[0..255] of char;
begin
  if GetShortPathName(PChar(aFile),aTmp,Sizeof(aTmp)-1)=0 then
     Result:=aFile
  else
     Result:=StrPas(aTmp);
end;

{$ENDIF}

function ExtractName(const Filename: String): String;
var
  aExt : String;
  aPos : Integer;
begin
  aExt:=ExtractFileExt(Filename);
  Result:=ExtractFileName(Filename);
  if aExt <> '' then
  begin
    aPos:=Pos(aExt,Result);
    if aPos>0 then
       Delete(Result,aPos,Length(aExt));
  end;
end;

{ date calculations }

function  dateYear(D: TDateTime): Integer;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=Year;
end;

function  dateMonth(D: TDateTime): Integer;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=Month;
end;

function  dateBeginOfYear(D: TDateTime): TDateTime;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=EncodeDate(Year,1,1);
end;

function  dateEndOfYear(D: TDateTime): TDateTime;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=EncodeDate(Year,12,31);
end;

function  dateBeginOfMonth(D: TDateTime): TDateTime;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=EncodeDate(Year,Month,1);
end;

function  dateEndOfMonth(D: TDateTime): TDateTime;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  if Month=12 then
  begin
    Inc(Year);
    Month:=1;
  end else
    Inc(Month);
  Result:=EncodeDate(Year,Month,1)-1;
end;

function dateWeekOfYear(D: TDateTime): Integer; { Armin Hanisch }
const
  t1: array[1..7] of ShortInt = ( -1,  0,  1,  2,  3, -3, -2);
  t2: array[1..7] of ShortInt = ( -4,  2,  1,  0, -1, -2, -3);
var
  doy1,
  doy2    : Integer;
  NewYear : TDateTime;
begin
  NewYear:=dateBeginOfYear(D);
  doy1 := dateDayofYear(D) + t1[DayOfWeek(NewYear)];
  doy2 := dateDayofYear(D) + t2[DayOfWeek(D)];
  if doy1 <= 0 then
    Result := dateWeekOfYear(NewYear-1)
  else if (doy2 >= dateDayofYear(dateEndOfYear(NewYear))) then
    Result:= 1
  else
    Result:=(doy1-1) div 7+1;
end;

function dateDayOfYear(D: TDateTime): Integer;
begin
  Result:=Trunc(D-dateBeginOfYear(D))+1;
end;

function dateDayOfWeek(D: TDateTime): TDayOfWeek;
begin
  Result:=TDayOfWeek(Pred(DayOfWeek(D)));
end;

function dateLeapYear(D: TDateTime): Boolean;
var
  Year,Month,Day: Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=(Year mod 4 = 0) and ((Year mod 100 <> 0) or (Year mod 400 = 0));
end;

function dateBeginOfQuarter(D: TDateTime):TDateTime;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=EncodeDate(Year,((Month-1 div 3) * 3)+1,1);
end;

function dateEndOfQuarter(D: TDateTime): TDateTime;
begin
  Result:=dateBeginOfQuarter(dateBeginOfQuarter(D)+(3*31))-1;
end;

function dateBeginOfWeek(D: TDateTime; Weekday: Integer): TDateTime;
begin
  Result:=D;
  while DayOfWeek(Result)<>Weekday do Result:=Result-1;
end;

function dateDaysInMonth(D: TDateTime): Integer;
const
  DaysPerMonth: array[1..12] of Byte= (31,28,31,30,31,30,31,31,30,31,30,31);
var
  Month: Integer;
begin
  Month:=dateMonth(D);
  Result:=DaysPerMonth[Month];
  if (Month=2) and dateLeapYear(D) then Inc(Result);
end;

function dateDay(D: TDateTime): Integer;
var
  Year,Month,Day : Word;
begin
  DecodeDate(D,Year,Month,Day);
  Result:=Day;
end;

function dateQuicken(D: TDateTime; Key: Char): TDateTime;
const
 {$IFDEF German}
  _ToDay    = 'H';
  _PrevYear = 'J';
  _NextYear = 'R';
  _PrevMonth= 'M';
  _NextMonth= 'T';
 {$ELSE}
  _ToDay    = 'H';      { if someone knows US keys, please tell us }
  _PrevYear = 'J';
  _NextYear = 'R';
  _PrevMonth= 'M';
  _NextMonth= 'T';
 {$ENDIF}

begin
  case Upcase(Key) of                     { Quicken Date Fast Keys }
    '+'        : Result := D+1;
    '-'        : Result := D-1;
    _ToDay     : Result := Date;
    _PrevYear  : if D <> dateBeginOfYear(D)  then Result:=dateBeginOfYear(D)
                                             else Result:=dateBeginOfYear(D-1);
    _NextYear  : if D <> dateEndOfYear(D)    then Result:=dateEndOfYear(D)
                                             else Result:=dateEndOfYear(Date+1);
    _PrevMonth : if D <> dateBeginOfMonth(D) then Result:=dateBeginOfMonth(D)
                                             else Result:=dateBeginOfMonth(D-1);
    _NextMonth : if D <> dateEndOfMonth(D)   then Result:=dateEndOfMonth(D)
                                             else Result:=dateEndOfMonth(D+1);
    else Result := D;
  end;
end;

{ time functions }

function  timeHour(T: TDateTime): Integer;
var
  Hour,Minute,Sec,Sec100: Word;
begin
  DecodeTime(T,Hour,Minute,Sec,Sec100);
  Result:=Hour;
end;

function  timeMin(T: TDateTime): Integer;
var
  Hour,Minute,Sec,Sec100: Word;
begin
  DecodeTime(T,Hour,Minute,Sec,Sec100);
  Result:=Minute;
end;

function  timeSec(T: TDateTime): Integer;
var
  Hour,Minute,Sec,Sec100: Word;
begin
  DecodeTime(T,Hour,Minute,Sec,Sec100);
  Result:=Sec;
end;

function  timeToInt(T: TDateTime): Integer;
begin
  Result:=Trunc((MSecsPerday * T) / 1000);
end;

{$IFDEF Win32}
function  timeZoneOffset: Integer;
var
  aTimeZoneInfo : TTimeZoneInformation;
begin
  if GetTimeZoneInformation(aTimeZoneInfo)<>-1 then
     Result := aTimeZoneInfo.Bias
  else
     Result := 0;
end;
{$ENDIF}

{ Communications Functions }

function  comIsCis(const S: String): Boolean;
var
  aSt: String;
  PreId,
  PostId: Integer;
begin
  Result:=strContainsU('@compuserve.com',S);     { 28.7.96 sb This is also on CIS }
  if not Result then
     if Pos(',',S) > 0 then
     try
       aSt:=S;
       PreId:=StrToInt(strToken(aSt,','));
       PostId:=StrToInt(aSt);
       Result:=(PreId > 0) and (PostId > 0);
     except
       Result:=False;
     end;
end;

function  comIsInt(const S: String): Boolean;
var
  aSt : String;
  PreId,
  PostId : String;
begin
  try
    aSt:=S;
    PreId:=strToken(aSt,'@');
    PostId:=aSt;
    Result:=(Length(PreId)>0) and (Length(PostId)>0);
  except
    Result:=False;
  end;
end;

{ converts a CIS adress to a correct Internet adress }
function  comCisToInt(const S: String): String;
var
  P : Integer;
begin
  p:=Pos('INTERNET:',S);
  if P=1 then
    Result:=Copy(S,P+1,Length(S))
  else
  begin
    Result:=S;
    P:=Pos(',',Result);
    if P>0 then Result[P]:='.';
    Result:=Result+'@compuserve.com';     { 22.07.96 sb  Error }
  end;
end;

{ converts a internet adress to a correct CServe adress }
function  comIntToCis(const S: String): String;
var
  P : Integer;
begin
  p:=Pos('@COMPUSERVE.COM',strUpper(S));
  if p > 0 then
  begin
    Result:=strLeft(S,P-1);
    P:=Pos('.',Result);
    if P>0 then Result[P]:=',';
  end else
    Result:='INTERNET:'+S;
end;

{ converts a fax adress to a correct CServe adress }
function  comFaxToCis(const S: String): String;
begin
  Result:='FAX:'+S;
end;

function comNormFax(const Name, Fax: String): String;
begin
  if Name<>'' then
     Result:=Name+'[fax: '+Name+'@'+strTrim(Fax)+']'
  else
     Result:='[fax: '+strTrim(Fax)+']';
end;

function  comNormInt(const Name,Int: String): String;
begin
  Result:='';
  if comIsInt(Int) then
     if Name <> '' then
        Result := Name + '|smtp: ' + strTrim(Int)
     else
        Result := 'smtp: ' + strTrim(Int);
end;

function  comNormCis(const Name,Cis: String): String;
begin
  Result:='';
  if Name <> '' then
     Result := Name + '[compuserve: ' + strTrim(Cis) + ']'
  else
     Result := '[compuserve: ' + strTrim(Cis) + ']';
end;

function  comNormPhone(const Phone: String): String;

  function strValueAt(const S:String; At: Integer): String;
  const
    Seperator = ',';
    Str = '"';
  var
    j,i: Integer;
    FSkip : Boolean;
  begin
    Result:='';
    j := 1;
    i := 0;
    FSkip:= False;
    while (i<=At ) and (j<=Length(S)) do
    begin
      if (S[j]=Str) then
         FSkip:=not FSkip
      else if (S[j]=Seperator) and not FSkip then
         Inc(i)
      else if i = At then
         Result:=Result+S[j];
      Inc(j);
    end;
  end;

var
  aNumber,
  aCountry,
  aPrefix,
  aDefault,
  aLocation  : String;

  i          : Integer;
begin
  aDefault  := '1,"Hamburg","","","40",49,0,0,0,"",1," "';
  aLocation := strProfile('telephon.ini','Locations','CurrentLocation','');
  if aLocation <> '' then
  begin
    aLocation:=strTokenAt(aLocation,',',0);
    if aLocation <> '' then
    begin
      aLocation:=strProfile('telephon.ini','Locations','Location'+aLocation,'');
      if aLocation <> '' then
         aDefault := aLocation;
    end;
  end;

  Result:='';
  aNumber:=strTrim(Phone);
  if aNumber <> '' then
    for i:=Length(aNumber) downto 1 do
      if not (aNumber[i] in DIGITS) then
      begin
        if aNumber[i] <> '+' then aNumber[i] := '-';
        if i < Length(aNumber) then                    { remove duplicate digits }
           if aNumber[i]=aNumber[i+1] then
              Delete(aNumber,i,1);
      end;

  if aNumber <> '' then
  begin
    if aNumber[1] = '+' then
       aCountry := strToken(aNumber,'-')
    else
       aCountry := '+'+strValueAt(aDefault,5);

    aNumber:=strTrimChL(aNumber,'-');

    if aNumber <> '' then
    begin
      if strTokenCount(aNumber,'-') > 1 then
         aPrefix := strTrimChL(strToken(aNumber,'-'),'0')
      else
         aPrefix := strValueAt(aDefault,4);

      aNumber:= strNicePhone(strTrimChA(aNumber,'-'));
      Result := aCountry + ' ('+aPrefix+') '+aNumber;
    end;
  end;
end;

{ system functions }

{$IFDEF Win32}
function sysTempPath: String;
var
  Buffer: array[0..1023] of Char;
begin
  SetString(Result, Buffer, GetTempPath(Sizeof(Buffer)-1,Buffer));
end;
{$ELSE}
function sysTempPath:String;
var
  Buffer: array[0..255] of char;
begin
  GetTempFileName(#0,'TMP',0,Buffer);             { 15.07.96 sb }
  Result:=StrPas(Buffer);
  DeleteFile(Result);
  Result:=ExtractFilePath(Result);
end;
{$ENDIF}

procedure sysDelay(aMs: Longint);
var
  TickCount       : LongInt;
begin
  TickCount:=GetTickCount;
  while GetTickCount - TickCount < aMs do Application.ProcessMessages;
end;

procedure sysBeep;
begin
  messageBeep($FFFF);
end;

function sysColorDepth: Integer;
var
  aDC: hDC;
begin
  Result:=0;
  try
    aDC := GetDC(0);
    Result:=1 shl (GetDeviceCaps(aDC,PLANES) * GetDeviceCaps(aDC, BITSPIXEL));
  finally
    ReleaseDC(0,aDC);
  end;
end;

{$IFDEF Win32}
procedure sysSaverRunning(Active: Boolean);
var
  aParam: Longint;
begin
  SystemParametersInfo (SPI_SCREENSAVERRUNNING, Word(Active),@aParam,0);
end;
{$ENDIF}

{ registry functions }

{$IFDEF Win32 }

function regReadString(aKey: HKEY; const Path: String): String;
var
  aRegistry : TRegistry;
  aPath     : String;
  aValue    : String;
begin
  aRegistry:=TRegistry.Create;
  try
    with aRegistry do
    begin
      RootKey:=aKey;
      aPath:=Path;
      aValue:='';
      while (Length(aPath)>0) and (strLastCh(aPath)<>'\') do
      begin
        aValue:=strLastCh(aPath)+aValue;
        strStripLast(aPath);
      end;
      OpenKey(aPath,True);
      Result:=ReadString(aValue);
    end;
  finally
    aRegistry.Free;
  end;
end;

procedure regWriteString(aKey: HKEY; const Path,Value: String);
var
  aRegistry : TRegistry;
  aPath     : String;
  aValue    : String;
begin
  aRegistry:=TRegistry.Create;
  try
    with aRegistry do
    begin
      RootKey:=aKey;
      aPath:=Path;
      aValue:='';
      while (Length(aPath)>0) and (strLastCh(aPath)<>'\') do
      begin
        aValue:=strLastCh(aPath)+aValue;
        strStripLast(aPath);
      end;
      OpenKey(aPath,True);
      WriteString(aValue,Value);
    end;
  finally
    aRegistry.Free;
  end;
end;

(*!!!
function regReadString(aKey: hKey; const Value: String): String;
var
  aTmp  : array[0..255] of char;
  aCb,
  aType : Integer;
begin
  Result:='';
  if aKey<> 0 then
  begin
    aCb:=Sizeof(aTmp)-1;
   { aData:=@aTmp; }
    if RegQueryValueEx(aKey,PChar(Value),nil,@aType,@aTmp,@aCb)=ERROR_SUCCESS then
       if aType=REG_SZ then Result:=String(aTmp);
  end;
end; *)

function regInfoString(const Value: String): String;
var
  aKey : hKey;
begin
  Result:='';
  if RegOpenKey(HKEY_LOCAL_MACHINE,REG_CURRENT_VERSION,aKey)=ERROR_SUCCESS then
  begin
    Result:=regReadString(aKey,Value);
    RegCloseKey(aKey);
  end;
end;

function regCurrentUser: String;
begin
  Result:=regInfoString(REG_CURRENT_USER);
end;

function regCurrentCompany: String;
begin
  Result:=regInfoString(REG_CURRENT_COMPANY);
end;

{ Add a shell extension to the registry }
procedure regWriteShellExt(const aExt,aCmd,aMenu,aExec: String);
var
  s, aPath : String;
begin
  with TRegistry.Create do
  try
    RootKey := HKEY_CLASSES_ROOT;
    aPath   := aExt;
    if KeyExists(aPath) then
    begin
      OpenKey(aPath,False);
      S:=ReadString('');
      CloseKey;
      if S<>'' then
         if KeyExists(S) then
            aPath:=S;
    end;

    OpenKey(aPath+'\Shell\'+aCmd,True);
    WriteString('',aMenu);
    CloseKey;

    OpenKey(aPath+'\Shell\'+aCmd+'\Command',True);
    WriteString('',aExec + ' %1');
    CloseKey;
  finally
    Free;
  end;
end;

{$ENDIF}

{ other stuff }

function MsgBox(const aTitle,aMsg: String; aFlag: Integer): Integer;
var
  ActiveWindow : hWnd;
  WindowList   : Pointer;
  TmpA         : array[0..200] of char;
  TmpB         : array[0..100] of char;
begin
  ActiveWindow:=GetActiveWindow;
  WindowList:= DisableTaskWindows(0);
  try
    StrPCopy(TmpB,aTitle);
    StrPCopy(TmpA,aMsg);
   {$IFDEF Win32}
    Result:=Windows.MessageBox(Application.Handle, TmpA, TmpB, aFlag);
   {$ELSE}
    Result:=WinProcs.MessageBox(Application.Handle, TmpA, TmpB, aFlag);
   {$ENDIF}
  finally
    EnableTaskWindows(WindowList);
    SetActiveWindow(ActiveWindow);
  end;
end;

function Question(const Msg: String):Boolean;
begin
  if IsWin95 or IsWinNT then
    Result:=MsgBox(LoadStr(SMsgdlgConfirm),Msg, MB_ICONQUESTION or MB_YESNO)=IDYES
  else
    Result:=messageDlg(Msg,mtConfirmation,[mbYes,mbNo],0)=mrYes;
end;

procedure Information(const Msg: String);
begin
  if IsWin95 or IsWinNT then
     MsgBox(LoadStr(SMsgdlgInformation), Msg, MB_ICONINFORMATION or MB_OK )
  else
     messageDlg(Msg,mtInformation,[mbOk],0);
end;

function Confirmation(const Msg: String): Word;
begin
  if IsWin95 or IsWinNT then
     case MsgBox(LoadStr(SMsgDlgConfirm),Msg,MB_ICONQUESTION or MB_YESNOCANCEL) of
       IDYES    : Result := mrYes;
       IDNO     : Result := mrNo;
       IDCANCEL : Result := mrCancel;
       else       Result := mrCancel;
     end
  else
     Result:=MessageDlg(Msg,mtConfirmation,[mbYes,mbNo,mbCancel],0);
end;

{ TPersistentRect }

constructor TPersistentRect.Create;
begin
  FRect:=rectSet(10,10,100,20);
end;

procedure TPersistentRect.Assign(Source: TPersistent);
var
 Value: TPersistentRect;
begin
  if Value is TPersistentRect then
  begin
    Value:=Source as TPersistentRect;
    FRect:=rectBounds(Value.Left,Value.Top,Value.Width,Value.Height);
    exit;
  end;
  inherited Assign(Source);
end;

procedure TPersistentRect.SetLeft(Value: Integer);
begin
  if Value<>Left then
  begin
    if Assigned(FOnConvert) then
       Value:=FOnConvert(Self,Value,False);
    FRect:=rectBounds(Value,Top,Width,Height);
  end;
end;

procedure TPersistentRect.SetTop(Value: Integer);
begin
  if Value<>Top then
  begin
    if Assigned(FOnConvert) then
       Value:=FOnConvert(Self,Value,False);
    FRect:=rectBounds(Left,Value,Width,Height);
  end;
end;

procedure TPersistentRect.SetHeight(Value: Integer);
begin
  if Value<>Height then
  begin
    if Assigned(FOnConvert) then
       Value:=FOnConvert(Self,Value,False);
    FRect:=rectBounds(Left,Top,Width,Value);
  end;
end;

procedure TPersistentRect.SetWidth(Value: Integer);
begin
  if Value<>Width then
  begin
    if Assigned(FOnConvert) then
       Value:=FOnConvert(Self,Value,False);
    FRect:=rectBounds(Left,Top,Value,Height);
  end;
end;

function  TPersistentRect.GetLeft: Integer;
begin
  Result:=FRect.Left;
  if Assigned(FOnConvert) then
     Result:=FOnConvert(Self,Result,True);
end;

function  TPersistentRect.GetTop: Integer;
begin
  Result:=FRect.Top;
  if Assigned(FOnConvert) then
     Result:=FOnConvert(Self,Result,True);
end;

function  TPersistentRect.GetHeight: Integer;
begin
  Result:=rectHeight(FRect);
  if Assigned(FOnConvert) then
     Result:=FOnConvert(Self,Result,True);
end;

function  TPersistentRect.GetWidth: Integer;
begin
  Result:=rectWidth(FRect);
  if Assigned(FOnConvert) then
     Result:=FOnConvert(Self,Result,True);
end;

{$IFDEF Win32}

{ TPersistentRegistry }

function TPersistentRegistry.ReadComponent(const Name: String;
                                 Owner, Parent: TComponent): TComponent;
var
  DataSize  : Integer;
  MemStream : TMemoryStream;
  Reader    : TReader;
begin
  Result := nil;
  DataSize:=GetDataSize(Name);
  MemStream := TMemoryStream.Create;
  try
    MemStream.SetSize(DataSize);
    ReadBinaryData(Name,MemStream.Memory^,DataSize);
    MemStream.Position := 0;

    Reader := TReader.Create(MemStream, 256);
    try
      Reader.Parent := Parent;
      Result := Reader.ReadRootComponent(nil);
      if Owner <> nil then
        try
          Owner.InsertComponent(Result);
        except
          Result.Free;
          raise;
        end;
    finally
      Reader.Free;
    end;

  finally
    MemStream.Free;
  end;
end;

procedure TPersistentRegistry.WriteComponent(const Name: String; Component: TComponent);
var
  MemStream: TMemoryStream;
begin
  MemStream := TMemoryStream.Create;
  try
    MemStream.WriteComponent(Component);
    WriteBinaryData(Name, MemStream.Memory^, MemStream.Size);
  finally
    MemStream.Free;
  end;
end;

{$ENDIF}

{ TSystemMetric }

constructor TSystemMetric.Create;
begin
  inherited Create;
  Update;
end;

procedure TSystemMetric.Update;

  function GetSystemPoint(ax,ay: Integer):TPoint;
  begin
    Result:=Point(GetSystemMetrics(ax),GetSystemMetrics(ay));
  end;

begin
  FMenuHeight    :=GetSystemMetrics(SM_CYMENU);
  FCaptionHeight :=GetSystemMetrics(SM_CYCAPTION);
  FBorder        :=GetSystemPoint(SM_CXBORDER,SM_CYBORDER);
  FFrame         :=GetSystemPoint(SM_CXFRAME,SM_CYFRAME);
  FDlgFrame      :=GetSystemPoint(SM_CXDLGFRAME,SM_CYDLGFRAME);
  FBitmap        :=GetSystemPoint(SM_CXSIZE,SM_CYSIZE);
  FHScroll       :=GetSystemPoint(SM_CXHSCROLL,SM_CYHSCROLL);
  FVScroll       :=GetSystemPoint(SM_CXVSCROLL,SM_CYVSCROLL);
  FThumb         :=GetSystemPoint(SM_CXHTHUMB,SM_CYVTHUMB);
  FFullScreen    :=GetSystemPoint(SM_CXFULLSCREEN,SM_CYFULLSCREEN);
  FMin           :=GetSystemPoint(SM_CXMIN,SM_CYMIN);
  FMinTrack      :=GetSystemPoint(SM_CXMINTRACK,SM_CYMINTRACK);
  FCursor        :=GetSystemPoint(SM_CXCURSOR,SM_CYCURSOR);
  FIcon          :=GetSystemPoint(SM_CXICON,SM_CYICON);
  FDoubleClick   :=GetSystemPoint(SM_CXDOUBLECLK,SM_CYDOUBLECLK);
  FIconSpacing   :=GetSystemPoint(SM_CXICONSPACING,SM_CYICONSPACING);
  FColorDepth    :=sysColorDepth;
end;

{ TDesktopCanvas }

constructor TDesktopCanvas.Create;
begin
  inherited Create;
  DC:=GetDC(0);
  Handle:=DC;
end;

destructor  TDesktopCanvas.Destroy;
begin
  Handle:=0;
  ReleaseDC(0, DC);
  inherited Destroy;
end;

{$IFNDEF Win32}

procedure DoneXProcs; far;
begin
  SysMetric.Free;
end;

{$ENDIF}

initialization
  Randomize;

  SysMetric := TSystemMetric.Create;
  IsWin95   := (GetVersion and $FF00) >= $5F00;
  IsWinNT   := (GetVersion < $80000000);
  IsFabula  := nil;

{$IFDEF Win32}
  xLanguage := (LoWord(GetUserDefaultLangID) and $3ff);
  case xLanguage of
    LANG_GERMAN    : xLangOfs := 70000;
    LANG_ENGLISH   : xLangOfs := 71000;
    LANG_SPANISH   : xLangOfs := 72000;
    LANG_RUSSIAN   : xLangOfs := 73000;
    LANG_ITALIAN   : xLangOfs := 74000;
    LANG_FRENCH    : xLangOfs := 75000;
    LANG_PORTUGUESE: xLangOfs := 76000;
    else             xLangOfs := 71000;
  end;
{$ENDIF}

{$IFDEF Win32}
finalization
  SysMetric.Free;
{$ELSE}
  AddExitProc(DoneXProcs);
{$ENDIF}
end.

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