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validate.pas
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{********[ SOURCE FILE OF GRAPHICAL FREE VISION ]**********}
{ }
{ System independent GRAPHICAL clone of VALIDATE.PAS }
{ }
{ Interface Copyright (c) 1992 Borland International }
{ }
{ Copyright (c) 1996, 1997, 1998, 1999 by Leon de Boer }
{ }
{****************[ THIS CODE IS FREEWARE ]*****************}
{ }
{ This sourcecode is released for the purpose to }
{ promote the pascal language on all platforms. You may }
{ redistribute it and/or modify with the following }
{ DISCLAIMER. }
{ }
{ This SOURCE CODE is distributed "AS IS" WITHOUT }
{ WARRANTIES AS TO PERFORMANCE OF MERCHANTABILITY OR }
{ ANY OTHER WARRANTIES WHETHER EXPRESSED OR IMPLIED. }
{ }
{*****************[ SUPPORTED PLATFORMS ]******************}
{ 16 and 32 Bit compilers }
{ DOS - Turbo Pascal 7.0 + (16 Bit) }
{ DPMI - Turbo Pascal 7.0 + (16 Bit) }
{ - FPC 0.9912+ (GO32V2) (32 Bit) }
{ WINDOWS - Turbo Pascal 7.0 + (16 Bit) }
{ - Delphi 1.0+ (16 Bit) }
{ WIN95/NT - Delphi 2.0+ (32 Bit) }
{ - Virtual Pascal 2.0+ (32 Bit) }
{ - Speedsoft Sybil 2.0+ (32 Bit) }
{ - FPC 0.9912+ (32 Bit) }
{ OS2 - Virtual Pascal 1.0+ (32 Bit) }
{ }
{******************[ REVISION HISTORY ]********************}
{ Version Date Fix }
{ ------- --------- --------------------------------- }
{ 1.00 12 Jun 96 Initial DOS/DPMI code released. }
{ 1.10 29 Aug 97 Platform.inc sort added. }
{ 1.20 13 Oct 97 Delphi3 32 bit code added. }
{ 1.30 11 May 98 Virtual pascal 2.0 code added. }
{ 1.40 10 Jul 99 Sybil 2.0 code added }
{ 1.41 03 Nov 99 FPC windows code added }
{**********************************************************}
UNIT Validate;
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
INTERFACE
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
{====Include file to sort compiler platform out =====================}
{$I platform.inc}
{====================================================================}
{==== Compiler directives ===========================================}
{$IFNDEF PPC_FPC}{ FPC doesn't support these switches }
{$F-} { Short calls are okay }
{$A+} { Word Align Data }
{$B-} { Allow short circuit boolean evaluations }
{$O+} { This unit may be overlaid }
{$G+} { 286 Code optimization - if you're on an 8088 get a real computer }
{$P-} { Normal string variables }
{$N-} { No 80x87 code generation }
{$E+} { Emulation is on }
{$ENDIF}
{$X+} { Extended syntax is ok }
{$R-} { Disable range checking }
{$S-} { Disable Stack Checking }
{$I-} { Disable IO Checking }
{$Q-} { Disable Overflow Checking }
{$V-} { Turn off strict VAR strings }
{====================================================================}
USES FVCommon, Objects, fvconsts; { GFV standard units }
{***************************************************************************}
{ PUBLIC CONSTANTS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ VALIDATOR STATUS CONSTANTS }
{---------------------------------------------------------------------------}
CONST
vsOk = 0; { Validator ok }
vsSyntax = 1; { Validator sytax err }
{---------------------------------------------------------------------------}
{ VALIDATOR OPTION MASKS }
{---------------------------------------------------------------------------}
CONST
voFill = $0001; { Validator fill }
voTransfer = $0002; { Validator transfer }
voOnAppend = $0004; { Validator append }
voReserved = $00F8; { Clear above flags }
{***************************************************************************}
{ RECORD DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ VALIDATOR TRANSFER CONSTANTS }
{---------------------------------------------------------------------------}
TYPE
TVTransfer = (vtDataSize, vtSetData, vtGetData); { Transfer states }
{---------------------------------------------------------------------------}
{ PICTURE VALIDATOR RESULT CONSTANTS }
{---------------------------------------------------------------------------}
TYPE
TPicResult = (prComplete, prIncomplete, prEmpty, prError, prSyntax,
prAmbiguous, prIncompNoFill);
{***************************************************************************}
{ OBJECT DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TValidator OBJECT - VALIDATOR ANCESTOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TValidator = OBJECT (TObject)
Status : Word; { Validator status }
Options: Word; { Validator options }
CONSTRUCTOR Load (Var S: TStream);
FUNCTION Valid(CONST S: String): Boolean;
FUNCTION IsValid (CONST S: String): Boolean; Virtual;
FUNCTION IsValidInput (Var S: String;
SuppressFill: Boolean): Boolean; Virtual;
FUNCTION Transfer (Var S: String; Buffer: Pointer;
Flag: TVTransfer): Word; Virtual;
PROCEDURE Error; Virtual;
PROCEDURE Store (Var S: TStream);
END;
PValidator = ^TValidator;
{---------------------------------------------------------------------------}
{ TPictureValidator OBJECT - PICTURE VALIDATOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TPXPictureValidator = OBJECT (TValidator)
Pic: PString; { Picture filename }
CONSTRUCTOR Init (Const APic: String; AutoFill: Boolean);
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION IsValid (Const S: String): Boolean; Virtual;
FUNCTION IsValidInput (Var S: String;
SuppressFill: Boolean): Boolean; Virtual;
FUNCTION Picture (Var Input: String;
AutoFill: Boolean): TPicResult; Virtual;
PROCEDURE Error; Virtual;
PROCEDURE Store (Var S: TStream);
END;
PPXPictureValidator = ^TPXPictureValidator;
TYPE CharSet = TCharSet;
{---------------------------------------------------------------------------}
{ TFilterValidator OBJECT - FILTER VALIDATOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TFilterValidator = OBJECT (TValidator)
ValidChars: CharSet; { Valid char set }
CONSTRUCTOR Init (AValidChars: CharSet);
CONSTRUCTOR Load (Var S: TStream);
FUNCTION IsValid (CONST S: String): Boolean; Virtual;
FUNCTION IsValidInput (Var S: String;
SuppressFill: Boolean): Boolean; Virtual;
PROCEDURE Error; Virtual;
PROCEDURE Store (Var S: TStream);
END;
PFilterValidator = ^TFilterValidator;
{---------------------------------------------------------------------------}
{ TRangeValidator OBJECT - RANGE VALIDATOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TRangeValidator = OBJECT (TFilterValidator)
Min: LongInt; { Min valid value }
Max: LongInt; { Max valid value }
CONSTRUCTOR Init(AMin, AMax: LongInt);
CONSTRUCTOR Load (Var S: TStream);
FUNCTION IsValid (Const S: String): Boolean; Virtual;
FUNCTION Transfer (Var S: String; Buffer: Pointer;
Flag: TVTransfer): Word; Virtual;
PROCEDURE Error; Virtual;
PROCEDURE Store (Var S: TStream);
END;
PRangeValidator = ^TRangeValidator;
{---------------------------------------------------------------------------}
{ TLookUpValidator OBJECT - LOOKUP VALIDATOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TLookupValidator = OBJECT (TValidator)
FUNCTION IsValid (Const S: String): Boolean; Virtual;
FUNCTION Lookup (Const S: String): Boolean; Virtual;
END;
PLookupValidator = ^TLookupValidator;
{---------------------------------------------------------------------------}
{ TStringLookUpValidator OBJECT - STRING LOOKUP VALIDATOR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TStringLookupValidator = OBJECT (TLookupValidator)
Strings: PStringCollection;
CONSTRUCTOR Init (AStrings: PStringCollection);
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION Lookup (Const S: String): Boolean; Virtual;
PROCEDURE Error; Virtual;
PROCEDURE NewStringList (AStrings: PStringCollection);
PROCEDURE Store (Var S: TStream);
END;
PStringLookupValidator = ^TStringLookupValidator;
{***************************************************************************}
{ INTERFACE ROUTINES }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ OBJECT REGISTER ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-RegisterValidate---------------------------------------------------
Calls RegisterType for each of the object types defined in this unit.
18May98 LdB
---------------------------------------------------------------------}
PROCEDURE RegisterValidate;
{***************************************************************************}
{ OBJECT REGISTRATION }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TPXPictureValidator STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RPXPictureValidator: TStreamRec = (
ObjType: idPXPictureValidator; { Register id = 80 }
{$IFDEF BP_VMTLink} { BP style VMT link }
VmtLink: Ofs(TypeOf(TPXPictureValidator)^);
{$ELSE} { Alt style VMT link }
VmtLink: TypeOf(TPXPictureValidator);
{$ENDIF}
Load: @TPXPictureValidator.Load; { Object load method }
Store: @TPXPictureValidator.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TFilterValidator STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RFilterValidator: TStreamRec = (
ObjType: idFilterValidator; { Register id = 81 }
{$IFDEF BP_VMTLink} { BP style VMT link }
VmtLink: Ofs(TypeOf(TFilterValidator)^);
{$ELSE} { Alt style VMT link }
VmtLink: TypeOf(TFilterValidator);
{$ENDIF}
Load: @TFilterValidator.Load; { Object load method }
Store: @TFilterValidator.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TRangeValidator STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RRangeValidator: TStreamRec = (
ObjType: idRangeValidator; { Register id = 82 }
{$IFDEF BP_VMTLink} { BP style VMT link }
VmtLink: Ofs(TypeOf(TRangeValidator)^);
{$ELSE} { Alt style VMT link }
VmtLink: TypeOf(TRangeValidator);
{$ENDIF}
Load: @TRangeValidator.Load; { Object load method }
Store: @TRangeValidator.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TStringLookupValidator STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RStringLookupValidator: TStreamRec = (
ObjType: idStringLookupValidator; { Register id = 83 }
{$IFDEF BP_VMTLink} { BP style VMT link }
VmtLink: Ofs(TypeOf(TStringLookupValidator)^);
{$ELSE} { Alt style VMT link }
VmtLink: TypeOf(TStringLookupValidator);
{$ENDIF}
Load: @TStringLookupValidator.Load; { Object load method }
Store: @TStringLookupValidator.Store { Object store method }
);
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
IMPLEMENTATION
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
USES MsgBox; { GFV standard unit }
{***************************************************************************}
{ PRIVATE ROUTINES }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ IsLetter -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION IsLetter (Chr: Char): Boolean;
BEGIN
Chr := Char(Ord(Chr) AND $DF); { Lower to upper case }
If (Chr >= 'A') AND (Chr <='Z') Then { Check if A..Z }
IsLetter := True Else IsLetter := False; { Return result }
END;
{---------------------------------------------------------------------------}
{ IsComplete -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION IsComplete (Rslt: TPicResult): Boolean;
BEGIN
IsComplete := Rslt IN [prComplete, prAmbiguous]; { Return if complete }
END;
{---------------------------------------------------------------------------}
{ IsInComplete -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION IsIncomplete (Rslt: TPicResult): Boolean;
BEGIN
IsIncomplete := Rslt IN
[prIncomplete, prIncompNoFill]; { Return if incomplete }
END;
{---------------------------------------------------------------------------}
{ NumChar -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION NumChar (Chr: Char; Const S: String): Byte;
VAR I, Total: Byte;
BEGIN
Total := 0; { Zero total }
For I := 1 To Length(S) Do { For entire string }
If (S[I] = Chr) Then Inc(Total); { Count matches of Chr }
NumChar := Total; { Return char count }
END;
{---------------------------------------------------------------------------}
{ IsSpecial -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION IsSpecial (Chr: Char; Const Special: String): Boolean;
VAR Rslt: Boolean; I: Byte;
BEGIN
Rslt := False; { Preset false result }
For I := 1 To Length(Special) Do
If (Special[I] = Chr) Then Rslt := True; { Character found }
IsSpecial := Rslt; { Return result }
END;
{***************************************************************************}
{ OBJECT METHODS }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TValidator OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TValidator---------------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TValidator.Load (Var S:TStream);
BEGIN
Inherited Init; { Call ancestor }
S.Read(Options, SizeOf(Options)); { Read option masks }
END;
{--TValidator---------------------------------------------------------------}
{ Valid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TValidator.Valid (Const S: String): Boolean;
BEGIN
Valid := False; { Preset false result }
If Not IsValid(S) Then Error { Check for error }
Else Valid := True; { Return valid result }
END;
{--TValidator---------------------------------------------------------------}
{ IsValid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TValidator.IsValid (Const S: String): Boolean;
BEGIN
IsValid := True; { Default return valid }
END;
{--TValidator---------------------------------------------------------------}
{ IsValidInput -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TValidator.IsValidInput (Var S: String; SuppressFill: Boolean): Boolean;
BEGIN
IsValidInput := True; { Default return true }
END;
{--TValidator---------------------------------------------------------------}
{ Transfer -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TValidator.Transfer (Var S: String; Buffer: Pointer;
Flag: TVTransfer): Word;
BEGIN
Transfer := 0; { Default return zero }
END;
{--TValidator---------------------------------------------------------------}
{ Error -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TValidator.Error;
BEGIN { Abstract method }
END;
{--TValidator---------------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TValidator.Store (Var S: TStream);
BEGIN
S.Write(Options, SizeOf(Options)); { Write options }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TPXPictureValidator OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TPXPictureValidator------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TPXPictureValidator.Init (Const APic: String; AutoFill: Boolean);
VAR S: String;
BEGIN
Inherited Init; { Call ancestor }
Pic := NewStr(APic); { Hold filename }
Options := voOnAppend; { Preset option mask }
If AutoFill Then Options := Options OR voFill; { Check/set fill mask }
S := ''; { Create empty string }
If (Picture(S, False) <> prEmpty) Then { Check for empty }
Status := vsSyntax; { Set error mask }
END;
{--TPXPictureValidator------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TPXPictureValidator.Load (Var S: TStream);
BEGIN
Inherited Load(S); { Call ancestor }
Pic := S.ReadStr; { Read filename }
END;
{--TPXPictureValidator------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TPXPictureValidator.Done;
BEGIN
If (Pic <> Nil) Then DisposeStr(Pic); { Dispose of filename }
Inherited Done; { Call ancestor }
END;
{--TPXPictureValidator------------------------------------------------------}
{ IsValid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TPXPictureValidator.IsValid (Const S: String): Boolean;
VAR Str: String; Rslt: TPicResult;
BEGIN
Str := S; { Transfer string }
Rslt := Picture(Str, False); { Check for picture }
IsValid := (Pic = nil) OR (Rslt = prComplete) OR
(Rslt = prEmpty); { Return result }
END;
{--TPXPictureValidator------------------------------------------------------}
{ IsValidInput -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TPXPictureValidator.IsValidInput (Var S: String;
SuppressFill: Boolean): Boolean;
BEGIN
IsValidInput := (Pic = Nil) OR (Picture(S,
(Options AND voFill <> 0) AND NOT SuppressFill)
<> prError); { Return input result }
END;
{--TPXPictureValidator------------------------------------------------------}
{ Picture -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TPXPictureValidator.Picture (Var Input: String; AutoFill: Boolean): TPicResult;
VAR I, J: Byte; Rslt: TPicResult; Reprocess: Boolean;
FUNCTION Process (TermCh: Byte): TPicResult;
VAR Rslt: TPicResult; Incomp: Boolean; OldI, OldJ, IncompJ, IncompI: Byte;
PROCEDURE Consume (Ch: Char);
BEGIN
Input[J] := Ch; { Return character }
Inc(J); { Inc count J }
Inc(I); { Inc count I }
END;
PROCEDURE ToGroupEnd (Var I: Byte);
VAR BrkLevel, BrcLevel: Integer;
BEGIN
BrkLevel := 0; { Zero bracket level }
BrcLevel := 0; { Zero bracket level }
Repeat
If (I <> TermCh) Then Begin { Not end }
Case Pic^[I] Of
'[': Inc(BrkLevel); { Inc bracket level }
']': Dec(BrkLevel); { Dec bracket level }
'{': Inc(BrcLevel); { Inc bracket level }
'}': Dec(BrcLevel); { Dec bracket level }
';': Inc(I); { Next character }
'*': Begin
Inc(I); { Next character }
While Pic^[I] in ['0'..'9'] Do Inc(I); { Search for text }
ToGroupEnd(I); { Move to group end }
Continue; { Now continue }
End;
End;
Inc(I); { Next character }
End;
Until ((BrkLevel = 0) AND (BrcLevel = 0)) OR { Both levels must be 0 }
(I = TermCh); { Terminal character }
END;
FUNCTION SkipToComma: Boolean;
BEGIN
Repeat
ToGroupEnd(I); { Find group end }
Until (I = TermCh) OR (Pic^[I] = ','); { Terminator found }
If (Pic^[I] = ',') Then Inc(I); { Comma so continue }
SkipToComma := (I < TermCh); { Return result }
END;
FUNCTION CalcTerm: Byte;
VAR K: Byte;
BEGIN
K := I; { Hold count }
ToGroupEnd(K); { Find group end }
CalcTerm := K; { Return count }
END;
FUNCTION Iteration: TPicResult;
VAR Itr, K, L: Byte; Rslt: TPicResult; NewTermCh: Byte;
BEGIN
Itr := 0; { Zero iteration }
Iteration := prError; { Preset error result }
Inc(I); { Skip '*' character }
While Pic^[I] in ['0'..'9'] Do Begin { Entry is a number }
Itr := Itr * 10 + Byte(Pic^[I]) - Byte('0'); { Convert to number }
Inc(I); { Next character }
End;
If (I <= TermCh) Then Begin { Not end of name }
K := I; { Hold count }
NewTermCh := CalcTerm; { Calc next terminator }
If (Itr <> 0) Then Begin
For L := 1 To Itr Do Begin { For each character }
I := K; { Reset count }
Rslt := Process(NewTermCh); { Process new entry }
If (NOT IsComplete(Rslt)) Then Begin { Not empty }
If (Rslt = prEmpty) Then { Check result }
Rslt := prIncomplete; { Return incomplete }
Iteration := Rslt; { Return result }
Exit; { Now exit }
End;
End;
End Else Begin
Repeat
I := K; { Hold count }
Rslt := Process(NewTermCh); { Process new entry }
Until (NOT IsComplete(Rslt)); { Until complete }
If (Rslt = prEmpty) OR (Rslt = prError) { Check for any error }
Then Begin
Inc(I); { Next character }
Rslt := prAmbiguous; { Return result }
End;
End;
I := NewTermCh; { Find next name }
End Else Rslt := prSyntax; { Completed }
Iteration := Rslt; { Return result }
END;
FUNCTION Group: TPicResult;
VAR Rslt: TPicResult; TermCh: Byte;
BEGIN
TermCh := CalcTerm; { Calc new term }
Inc(I); { Next character }
Rslt := Process(TermCh - 1); { Process the name }
If (NOT IsIncomplete(Rslt)) Then I := TermCh; { Did not complete }
Group := Rslt; { Return result }
END;
FUNCTION CheckComplete (Rslt: TPicResult): TPicResult;
VAR J: Byte;
BEGIN
J := I; { Hold count }
If IsIncomplete(Rslt) Then Begin { Check if complete }
While True Do
Case Pic^[J] Of
'[': ToGroupEnd(J); { Find name end }
'*': If not(Pic^[J + 1] in ['0'..'9'])
Then Begin
Inc(J); { Next name }
ToGroupEnd(J); { Find name end }
End Else Break;
Else Break;
End;
If (J = TermCh) Then Rslt := prAmbiguous; { End of name }
End;
CheckComplete := Rslt; { Return result }
END;
FUNCTION Scan: TPicResult;
VAR Ch: Char; Rslt: TPicResult;
BEGIN
Scan := prError; { Preset return error }
Rslt := prEmpty; { Preset empty result }
While (I <> TermCh) AND (Pic^[I] <> ',') { For each entry }
Do Begin
If (J > Length(Input)) Then Begin { Move beyond length }
Scan := CheckComplete(Rslt); { Return result }
Exit; { Now exit }
End;
Ch := Input[J]; { Fetch character }
Case Pic^[I] of
'#': If NOT (Ch in ['0'..'9']) Then Exit { Check is a number }
Else Consume(Ch); { Transfer number }
'?': If (NOT IsLetter(Ch)) Then Exit { Check is a letter }
Else Consume(Ch); { Transfer character }
'&': If (NOT IsLetter(Ch)) Then Exit { Check is a letter }
Else Consume(UpCase(Ch)); { Transfer character }
'!': Consume(UpCase(Ch)); { Transfer character }
'@': Consume(Ch); { Transfer character }
'*': Begin
Rslt := Iteration; { Now re-iterate }
If (NOT IsComplete(Rslt)) Then Begin { Check not complete }
Scan := Rslt; { Return result }
Exit; { Now exit }
End;
If (Rslt = prError) Then { Check for error }
Rslt := prAmbiguous; { Return ambiguous }
End;
'{': Begin
Rslt := Group; { Return group }
If (NOT IsComplete(Rslt)) Then Begin { Not incomplete check }
Scan := Rslt; { Return result }
Exit; { Now exit }
End;
End;
'[': Begin
Rslt := Group; { Return group }
If IsIncomplete(Rslt) Then Begin { Incomplete check }
Scan := Rslt; { Return result }
Exit; { Now exit }
End;
If (Rslt = prError) Then { Check for error }
Rslt := prAmbiguous; { Return ambiguous }
End;
Else If Pic^[I] = ';' Then Inc(I); { Move fwd for follow }
If (UpCase(Pic^[I]) <> UpCase(Ch)) Then { Characters differ }
If (Ch = ' ') Then Ch := Pic^[I] { Ignore space }
Else Exit;
Consume(Pic^[I]); { Consume character }
End; { Case }
If (Rslt = prAmbiguous) Then { If ambiguous result }
Rslt := prIncompNoFill { Set incomplete fill }
Else Rslt := prIncomplete; { Set incomplete }
End;{ While}
If (Rslt = prIncompNoFill) Then { Check incomp fill }
Scan := prAmbiguous Else { Return ambiguous }
Scan := prComplete; { Return completed }
END;
BEGIN
Incomp := False; { Clear incomplete }
InCompJ:=0; { set to avoid a warning }
OldI := I; { Hold I count }
OldJ := J; { Hold J count }
Repeat
Rslt := Scan; { Scan names }
If (Rslt IN [prComplete, prAmbiguous]) AND
Incomp AND (J < IncompJ) Then Begin { Check if complete }
Rslt := prIncomplete; { Return result }
J := IncompJ; { Return position }
End;
If ((Rslt = prError) OR (Rslt = prIncomplete)) { Check no errors }
Then Begin
Process := Rslt; { Hold result }
If ((NOT Incomp) AND (Rslt = prIncomplete)) { Check complete }
Then Begin
Incomp := True; { Set incomplete }
IncompI := I; { Set current position }
IncompJ := J; { Set current position }
End;
I := OldI; { Restore held value }
J := OldJ; { Restore held value }
If (NOT SkipToComma) Then Begin { Check not comma }
If Incomp Then Begin { Check incomplete }
Process := prIncomplete; { Set incomplete mask }
I := IncompI; { Hold incomp position }
J := IncompJ; { Hold incomp position }
End;
Exit; { Now exit }
End;
OldI := I; { Hold position }
End;
Until (Rslt <> prError) AND { Check for error }
(Rslt <> prIncomplete); { Incomplete load }
If (Rslt = prComplete) AND Incomp Then { Complete load }
Process := prAmbiguous Else { Return completed }
Process := Rslt; { Return result }
END;
FUNCTION SyntaxCheck: Boolean;
VAR I, BrkLevel, BrcLevel: Integer;
Begin
SyntaxCheck := False; { Preset false result }
If (Pic^ <> '') AND (Pic^[Length(Pic^)] <> ';') { Name is valid }
AND ((Pic^[Length(Pic^)] = '*') AND
(Pic^[Length(Pic^) - 1] <> ';') = False) { Not wildcard list }
Then Begin
I := 1; { Set count to 1 }
BrkLevel := 0; { Zero bracket level }
BrcLevel := 0; { Zero bracket level }
While (I <= Length(Pic^)) Do Begin { For each character }
Case Pic^[I] Of
'[': Inc(BrkLevel); { Inc bracket level }
']': Dec(BrkLevel); { Dec bracket level }
'{': Inc(BrcLevel); { Inc bracket level }
'}': Dec(BrcLevel); { Dec bracket level }
';': Inc(I); { Next character }
End;
Inc(I); { Next character }
End;
If (BrkLevel = 0) AND (BrcLevel = 0) Then { Check both levels 0 }
SyntaxCheck := True; { Return true syntax }
End;
End;
BEGIN
Picture := prSyntax; { Preset error default }
If SyntaxCheck Then Begin { Check syntax }
Picture := prEmpty; { Preset picture empty }
If (Input <> '') Then Begin { We have an input }
J := 1; { Set J count to 1 }
I := 1; { Set I count to 1 }
Rslt := Process(Length(Pic^) + 1); { Set end of name }
If (Rslt <> prError) AND (Rslt <> prSyntax) AND
(J <= Length(Input)) Then Rslt := prError; { Check for any error }
If (Rslt = prIncomplete) AND AutoFill { Check autofill flags }
Then Begin
Reprocess := False; { Set reprocess false }
while (I <= Length(Pic^)) AND (NOT { Not at end of name }
IsSpecial(Pic^[I], '#?&!@*{}[],'#0)) { No special chars }
DO Begin
If Pic^[I] = ';' Then Inc(I); { Check for next mark }
Input := Input + Pic^[I]; { Move to that name }
Inc(I); { Inc count }
Reprocess := True; { Set reprocess flag }
End;
J := 1; { Set J count to 1 }
I := 1; { Set I count to 1 }
If Reprocess Then { Check for reprocess }
Rslt := Process(Length(Pic^) + 1); { Move to next name }
End;
If (Rslt = prAmbiguous) Then { Result ambiguous }
Picture := prComplete Else { Return completed }
If (Rslt = prInCompNoFill) Then { Result incomplete }
Picture := prIncomplete Else { Return incomplete }
Picture := Rslt; { Return result }
End;
End;
END;
{--TPXPictureValidator------------------------------------------------------}
{ Error -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TPXPictureValidator.Error;
CONST PXErrMsg = 'Input does not conform to picture:';
VAR S: String;
BEGIN
If (Pic <> Nil) Then S := Pic^ Else S := 'No name';{ Transfer filename }
MessageBox(PxErrMsg + #13' %s', @S, mfError OR
mfOKButton); { Message box }
END;
{--TPXPictureValidator------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TPXPictureValidator.Store (Var S: TStream);
BEGIN
TValidator.Store(S); { TValidator.store call }
S.WriteStr(Pic); { Write filename }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TFilterValidator OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TFilterValidator---------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TFilterValidator.Init (AValidChars: CharSet);
BEGIN
Inherited Init; { Call ancestor }
ValidChars := AValidChars; { Hold valid char set }
END;
{--TFilterValidator---------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TFilterValidator.Load (Var S: TStream);
BEGIN
Inherited Load(S); { Call ancestor }
S.Read(ValidChars, SizeOf(ValidChars)); { Read valid char set }
END;
{--TFilterValidator---------------------------------------------------------}
{ IsValid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TFilterValidator.IsValid (Const S: String): Boolean;
VAR I: Integer;
BEGIN
I := 1; { Start at position 1 }
While S[I] In ValidChars Do Inc(I); { Check each char }
If (I > Length(S)) Then IsValid := True Else { All characters valid }
IsValid := False; { Invalid characters }
END;
{--TFilterValidator---------------------------------------------------------}
{ IsValidInput -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TFilterValidator.IsValidInput (Var S: String; SuppressFill: Boolean): Boolean;
VAR I: Integer;
BEGIN
I := 1; { Start at position 1 }
While S[I] In ValidChars Do Inc(I); { Check each char }
If (I > Length(S)) Then IsValidInput := True { All characters valid }
Else IsValidInput := False; { Invalid characters }
END;
{--TFilterValidator---------------------------------------------------------}
{ Error -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TFilterValidator.Error;
CONST PXErrMsg = 'Invalid character in input';
BEGIN
MessageBox(PXErrMsg, Nil, mfError OR mfOKButton); { Show error message }
END;
{--TFilterValidator---------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TFilterValidator.Store (Var S: TStream);
BEGIN
TValidator.Store(S); { TValidator.Store call }
S.Write(ValidChars, SizeOf(ValidChars)); { Write valid char set }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TRangeValidator OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TRangeValidator----------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TRangeValidator.Init (AMin, AMax: LongInt);
BEGIN
Inherited Init(['0'..'9','+','-']); { Call ancestor }
If (AMin >= 0) Then { Check min value > 0 }
ValidChars := ValidChars - ['-']; { Is so no negatives }
Min := AMin; { Hold min value }
Max := AMax; { Hold max value }
END;
{--TRangeValidator----------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TRangeValidator.Load (Var S: TStream);
BEGIN
Inherited Load(S); { Call ancestor }
S.Read(Min, SizeOf(Min)); { Read min value }
S.Read(Max, SizeOf(Max)); { Read max value }
END;
{--TRangeValidator----------------------------------------------------------}
{ IsValid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TRangeValidator.IsValid (Const S: String): Boolean;
VAR Value: LongInt; Code: Sw_Integer;
BEGIN
IsValid := False; { Preset false result }
If Inherited IsValid(S) Then Begin { Call ancestor }
Val(S, Value, Code); { Convert to number }
If (Value >= Min) AND (Value <= Max) { With valid range }
AND (Code = 0) Then IsValid := True; { No illegal chars }
End;
END;
{--TRangeValidator----------------------------------------------------------}
{ Transfer -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TRangeValidator.Transfer (Var S: String; Buffer: Pointer; Flag: TVTransfer): Word;
VAR Value: LongInt; Code: Sw_Integer;
BEGIN
If (Options AND voTransfer <> 0) Then Begin { Tranfer mask set }
Transfer := SizeOf(Value); { Transfer a longint }
Case Flag Of
vtGetData: Begin
Val(S, Value, Code); { Convert s to number }
LongInt(Buffer^) := Value; { Transfer result }
End;
vtSetData: Str(LongInt(Buffer^), S); { Convert to string s }
End;
End Else Transfer := 0; { No transfer = zero }
END;
{--TRangeValidator----------------------------------------------------------}
{ Error -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRangeValidator.Error;
CONST PXErrMsg = 'Value not in the range';
VAR Params: Array[0..1] Of Longint;
BEGIN
Params[0] := Min; { Transfer min value }
Params[1] := Max; { Transfer max value }
MessageBox(PXErrMsg+' %d to %d', @Params,
mfError OR mfOKButton); { Display message }
END;
{--TRangeValidator----------------------------------------------------------}
{ Store -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
PROCEDURE TRangeValidator.Store (Var S: TStream);
BEGIN
TFilterValidator.Store(S); { TFilterValidator.Store }
S.Write(Min, SizeOf(Min)); { Write min value }
S.Write(Max, SizeOf(Max)); { Write max value }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TLookUpValidator OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TLookUpValidator---------------------------------------------------------}
{ IsValid -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TLookUpValidator.IsValid (Const S: String): Boolean;
BEGIN
IsValid := LookUp(S); { Check for string }
END;
{--TLookUpValidator---------------------------------------------------------}
{ LookUp -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TLookupValidator.Lookup (Const S: String): Boolean;
BEGIN
Lookup := True; { Default return true }
END;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TStringLookUpValidator OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TStringLookUpValidator---------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TStringLookUpValidator.Init (AStrings: PStringCollection);
BEGIN
Inherited Init; { Call ancestor }
Strings := AStrings; { Hold string list }
END;
{--TStringLookUpValidator---------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TStringLookUpValidator.Load (Var S: TStream);
BEGIN
Inherited Load(S); { Call ancestor }
Strings := PStringCollection(S.Get); { Fecth string list }
END;
{--TStringLookUpValidator---------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TStringLookUpValidator.Done;
BEGIN
NewStringList(Nil); { Dispsoe string list }
Inherited Done; { Call ancestor }
END;
{--TStringLookUpValidator---------------------------------------------------}
{ Lookup -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 18May98 LdB }
{---------------------------------------------------------------------------}
FUNCTION TStringLookUpValidator.Lookup (Const S: String): Boolean;
{$IFDEF PPC_VIRTUAL} VAR Index: LongInt; {$ELSE} VAR Index: sw_Integer; {$ENDIF}
BEGIN
Lookup := False; { Preset false return }
If (Strings <> Nil) Then
Lookup := Strings^.Search(@S, Index); { Search for string }
END;