delete XMLDataBindingUtils since it used togaether in x2utils as searchpath
This commit is contained in:
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@ -1,908 +0,0 @@
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{
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Helpers functions for the X2Software XML Data Binding
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Last changed: $Date$
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Revision: $Rev$
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URL: $URL$
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}
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unit XMLDataBindingUtils;
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interface
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uses
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Classes,
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SysUtils,
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XMLDoc,
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xmldom,
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XMLIntf;
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type
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EBase64Error = class(Exception);
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TXMLDateTimeFormat = (xdtDateTime, xdtDate, xdtTime);
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TXMLTimeFragment = (xtfMilliseconds, xtfTimezone);
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TXMLTimeFragments = set of TXMLTimeFragment;
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IXSDValidate = interface
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['{3BFDC851-7459-403B-87B3-A52E9E85BC8C}']
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procedure XSDValidate;
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end;
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TX2XMLNode = class(TXMLNode)
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private
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function GetChildNodesNS(const ANodeName, ANamespaceURI: DOMString): IXMLNode;
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protected
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property ChildNodesNS[const ANodeName, ANamespaceURI: DOMString]: IXMLNode read GetChildNodesNS;
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end;
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TX2XMLNodeCollection = class(TXMLNodeCollection)
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private
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function GetChildNodesNS(const ANodeName, ANamespaceURI: DOMString): IXMLNode;
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protected
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property ChildNodesNS[const ANodeName, ANamespaceURI: DOMString]: IXMLNode read GetChildNodesNS;
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end;
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TXMLNodeCollectionEnumerator = class(TInterfacedObject)
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private
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FNodeCollection: IXMLNodeCollection;
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FIndex: Integer;
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public
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constructor Create(ANodeCollection: IXMLNodeCollection);
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function GetCurrent: IXMLNode;
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function MoveNext: Boolean; virtual;
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property Current: IXMLNode read GetCurrent;
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end;
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const
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AllTimeFragments = [Low(TXMLTimeFragment)..High(TXMLTimeFragment)];
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function DateTimeToXML(ADate: TDateTime; AFormat: TXMLDateTimeFormat; ATimeFragments: TXMLTimeFragments = AllTimeFragments): string;
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function XMLToDateTime(const ADate: string; AFormat: TXMLDateTimeFormat): TDateTime;
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function BoolToXML(AValue: Boolean): WideString;
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function XMLToBool(const AValue: WideString): Boolean;
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function FloatToXML(AValue: Extended): WideString;
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function XMLToFloat(const AValue: WideString): Extended;
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function GetNodeIsNil(ANode: IXMLNode): Boolean;
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procedure SetNodeIsNil(ANode: IXMLNode; ASetNil: Boolean);
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procedure XSDValidate(AParent: IXMLNode; ARecurse: Boolean = True; AValidateParent: Boolean = True);
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procedure CreateRequiredElements(AParent: IXMLNode; ANodes: array of string);
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procedure CreateRequiredAttributes(AParent: IXMLNode; ANodes: array of string);
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procedure SortChildNodes(AParent: IXMLNode; ASortOrder: array of string);
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{ Now wraps the JclMime implementation:
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Lightening fast Mime (Base64) Encoding and Decoding routines.
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Coded by Ralf Junker (ralfjunker@gmx.de).}
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function Base64Encode(AValue: String): String;
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function Base64Decode(AValue: String): String;
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procedure Base64DecodeToStream(AValue: String; AStream: TStream);
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procedure Base64DecodeToFile(AValue: String; const AFileName: String);
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const
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XMLSchemaInstanceURI = 'http://www.w3.org/2001/XMLSchema-instance';
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XMLDateFormat = 'yyyy"-"mm"-"dd';
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XMLTimeFormat = 'hh":"nn":"ss';
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XMLMsecsFormat = '"."zzz';
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XMLTimezoneZulu = 'Z';
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XMLTimezoneFormat = '%s%.2d:%.2d';
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XMLDateTimeFormats: array[TXMLDateTimeFormat] of String =
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(
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XMLDateFormat + '"T"' + XMLTimeFormat,
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XMLDateFormat,
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XMLTimeFormat
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);
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XMLTimezoneSigns: array[Boolean] of Char = ('-', '+');
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XMLBoolValues: array[Boolean] of String =
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(
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'false',
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'true'
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);
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XMLIsNilAttribute = 'nil';
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XMLIsNilAttributeNS = 'xsi:nil';
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Base64ValidChars = ['A'..'Z', 'a'..'z', '0'..'9', '+', '/'];
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Base64LookupTable = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' +
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'abcdefghijklmnopqrstuvwxyz' +
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'0123456789+/';
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Base64Padding = '=';
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implementation
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uses
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DateUtils,
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Math,
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Types,
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Windows;
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type
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PSortNodeInfo = ^TSortNodeInfo;
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TSortNodeInfo = record
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Node: IXMLNode;
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SortIndex: Integer;
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OriginalIndex: Integer;
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end;
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function MimeEncodeString(const S: AnsiString): AnsiString; forward;
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function MimeDecodeString(const S: AnsiString): AnsiString; forward;
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procedure MimeEncodeStream(const InputStream: TStream; const OutputStream: TStream); forward;
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procedure MimeDecodeStream(const InputStream: TStream; const OutputStream: TStream); forward;
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function MimeEncodedSize(const I: Cardinal): Cardinal; forward;
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function MimeDecodedSize(const I: Cardinal): Cardinal; forward;
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procedure MimeEncode(var InputBuffer; const InputByteCount: Cardinal; var OutputBuffer); forward;
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function MimeDecode(var InputBuffer; const InputBytesCount: Cardinal; var OutputBuffer): Cardinal; forward;
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function MimeDecodePartial(var InputBuffer; const InputBytesCount: Cardinal; var OutputBuffer; var ByteBuffer: Cardinal; var ByteBufferSpace: Cardinal): Cardinal; forward;
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function MimeDecodePartialEnd(var OutputBuffer; const ByteBuffer: Cardinal; const ByteBufferSpace: Cardinal): Cardinal; forward;
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{ TX2XMLNode }
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function TX2XMLNode.GetChildNodesNS(const ANodeName, ANamespaceURI: DOMString): IXMLNode;
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begin
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Result := ChildNodes.FindNode(ANodeName, ANamespaceURI);
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if (not Assigned(Result)) and (doNodeAutoCreate in OwnerDocument.Options) then
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Result := AddChild(ANodeName, ANamespaceURI);
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end;
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{ TX2XMLNodeCollection }
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function TX2XMLNodeCollection.GetChildNodesNS(const ANodeName, ANamespaceURI: DOMString): IXMLNode;
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begin
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Result := ChildNodes.FindNode(ANodeName, ANamespaceURI);
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if (not Assigned(Result)) and (doNodeAutoCreate in OwnerDocument.Options) then
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Result := AddChild(ANodeName, ANamespaceURI);
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end;
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{ TXMLNodeCollectionEnumerator }
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constructor TXMLNodeCollectionEnumerator.Create(ANodeCollection: IXMLNodeCollection);
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begin
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inherited Create;
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FNodeCollection := ANodeCollection;
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FIndex := -1;
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end;
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function TXMLNodeCollectionEnumerator.GetCurrent: IXMLNode;
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begin
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if (FIndex >= 0) and (FIndex < FNodeCollection.Count) then
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Result := FNodeCollection.Nodes[FIndex]
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else
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Result := nil;
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end;
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function TXMLNodeCollectionEnumerator.MoveNext: Boolean;
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begin
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Inc(FIndex);
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Result := (FIndex < FNodeCollection.Count);
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end;
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function DateTimeToXML(ADate: TDateTime; AFormat: TXMLDateTimeFormat; ATimeFragments: TXMLTimeFragments): string;
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var
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formatSettings: TFormatSettings;
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timeZone: TTimeZoneInformation;
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timeOffset: Integer;
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begin
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GetLocaleFormatSettings(LOCALE_SYSTEM_DEFAULT, formatSettings);
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Result := FormatDateTime(XMLDateTimeFormats[AFormat], ADate, formatSettings);
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if AFormat in [xdtDateTime, xdtTime] then
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begin
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if xtfMilliseconds in ATimeFragments then
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Result := Result + FormatDateTime(XMLMsecsFormat, ADate);
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if xtfTimezone in ATimeFragments then
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begin
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FillChar(timeZone, SizeOf(TTimeZoneInformation), #0);
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if GetTimeZoneInformation(timeZone) <> TIME_ZONE_ID_INVALID then
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begin
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timeOffset := -timeZone.Bias;
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if timeOffset = 0 then
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Result := Result + XMLTimezoneZulu
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else
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Result := Result + Format(XMLTimezoneFormat,
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[XMLTimezoneSigns[timeOffset > 0],
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Abs(timeZone.Bias div 60),
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Abs(timeZone.Bias mod 60)]);
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end;
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end;
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end;
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end;
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function XMLToDateTime(const ADate: string; AFormat: TXMLDateTimeFormat): TDateTime;
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const
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{ yyyy-mm-ddThh:nn:ss.zzz+xx:xx }
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XMLTimeSeparatorPos = 11;
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XMLTimeSeparator = 'T';
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XMLMinTimeLength = 8;
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var
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date: string;
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time: string;
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year: Integer;
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month: Integer;
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day: Integer;
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hour: Integer;
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minute: Integer;
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second: Integer;
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msec: Integer;
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hasTimezone: Boolean;
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xmlOffset: Integer;
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timeZone: TTimeZoneInformation;
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localOffset: Integer;
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begin
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Result := 0;
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date := '';
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time := '';
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case AFormat of
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xdtDateTime:
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begin
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if (Length(ADate) < XMLTimeSeparatorPos) or
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(ADate[XMLTimeSeparatorPos] <> XMLTimeSeparator) then
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Exit;
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date := ADate;
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time := ADate;
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SetLength(date, Pred(XMLTimeSeparatorPos));
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Delete(time, 1, XMLTimeSeparatorPos);
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end;
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xdtDate:
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begin
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if Length(ADate) < Pred(XMLTimeSeparatorPos) then
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Exit;
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date := ADate;
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end;
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xdtTime:
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begin
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if Length(ADate) < XMLMinTimeLength then
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Exit;
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time := ADate;
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end;
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end;
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if AFormat in [xdtDateTime, xdtDate] then
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begin
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{ Parse date (yyyy-mm-hh) }
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if TryStrToInt(Copy(date, 1, 4), year) and
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TryStrToInt(Copy(date, 6, 2), month) and
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TryStrToInt(Copy(date, 9, 2), day) then
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Result := EncodeDate(year, month, day);
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end;
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if AFormat in [xdtDateTime, xdtTime] then
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begin
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{ Parse time (hh:nn:ss) }
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if TryStrToInt(Copy(time, 1, 2), hour) and
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TryStrToInt(Copy(time, 4, 2), minute) and
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TryStrToInt(Copy(time, 7, 2), second) then
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begin
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msec := 0;
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Delete(time, 1, 8);
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if Length(time) > 0 then
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begin
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if time[1] = '.' then
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begin
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{ Parse milliseconds (.zzz) }
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if not TryStrToInt(Copy(time, 2, 3), msec) then
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msec := 0;
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Delete(time, 1, 4);
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end;
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end;
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Result := Result + EncodeTime(hour, minute, second, msec);
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if Length(time) > 0 then
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begin
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hasTimezone := False;
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xmlOffset := 0;
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if time[1] = XMLTimezoneZulu then
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begin
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{ Zulu time }
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hasTimezone := True;
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end else if time[1] in [XMLTimezoneSigns[False], XMLTimezoneSigns[True]] then
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begin
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{ Parse timezone ([+|-]xx:xx) }
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if TryStrToInt(Copy(time, 2, 2), hour) and
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TryStrToInt(Copy(time, 5, 2), minute) then
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begin
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xmlOffset := (hour * MinsPerHour) + minute;
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hasTimezone := True;
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if time[1] = XMLTimezoneSigns[False] then
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xmlOffset := -xmlOffset;
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end;
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end;
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if hasTimezone then
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begin
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FillChar(timeZone, SizeOf(TTimeZoneInformation), #0);
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if GetTimeZoneInformation(timeZone) <> TIME_ZONE_ID_INVALID then
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begin
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localOffset := -timeZone.Bias;
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Result := IncMinute(Result, localOffset - xmlOffset);
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end;
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end;
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end;
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end;
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end;
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end;
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function BoolToXML(AValue: Boolean): WideString;
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begin
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Result := XMLBoolValues[AValue];
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end;
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function XMLToBool(const AValue: WideString): Boolean;
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begin
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Result := StrToBoolDef(AValue, False);
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end;
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function GetXMLFloatFormatSettings(): TFormatSettings;
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begin
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Result.DecimalSeparator := '.';
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end;
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function FloatToXML(AValue: Extended): WideString;
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begin
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Result := FloatToStr(AValue, GetXMLFloatFormatSettings());
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end;
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function XMLToFloat(const AValue: WideString): Extended;
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begin
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Result := StrToFloat(AValue, GetXMLFloatFormatSettings());
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end;
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function Base64Encode(AValue: String): String;
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begin
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Result := MimeEncodeString(AValue);
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end;
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function Base64Decode(AValue: String): String;
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begin
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Result := MimeDecodeString(AValue);
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end;
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procedure Base64DecodeToStream(AValue: String; AStream: TStream);
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var
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input: TStringStream;
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begin
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input := TStringStream.Create(AValue);
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try
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MimeDecodeStream(input, AStream);
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finally
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FreeAndNil(input);
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end;
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end;
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procedure Base64DecodeToFile(AValue: String; const AFileName: String);
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var
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input: TStringStream;
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output: TFileStream;
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begin
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input := TStringStream.Create(AValue);
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try
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output := TFileStream.Create(AFileName, fmCreate or fmShareDenyWrite);
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try
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MimeDecodeStream(input, output);
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finally
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FreeAndNil(output);
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end;
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finally
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FreeAndNil(input);
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end;
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end;
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function GetNodeIsNil(ANode: IXMLNode): Boolean;
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begin
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Result := ANode.HasAttribute(XMLIsNilAttribute, XMLSchemaInstanceURI) and
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XMLToBool(ANode.GetAttributeNS(XMLIsNilAttribute, XMLSchemaInstanceURI));
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end;
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procedure SetNodeIsNil(ANode: IXMLNode; ASetNil: Boolean);
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var
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documentElement: IXMLNode;
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begin
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if ASetNil then
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begin
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ANode.ChildNodes.Clear;
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documentElement := ANode.OwnerDocument.DocumentElement;
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if not documentElement.HasAttribute('xmlns:xsi') then
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documentElement.SetAttributeNS('xmlns:xsi', '', XMLSchemaInstanceURI);
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ANode.SetAttributeNS(XMLIsNilAttributeNS, XMLSchemaInstanceURI, BoolToXML(True));
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end else
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ANode.AttributeNodes.Delete(XMLIsNilAttribute, XMLSchemaInstanceURI);
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end;
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function DoSortNodes(Item1, Item2: Pointer): Integer;
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var
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nodeInfo1: PSortNodeInfo;
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nodeInfo2: PSortNodeInfo;
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begin
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nodeInfo1 := Item1;
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nodeInfo2 := Item2;
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if (nodeInfo1^.SortIndex > -1) and (nodeInfo2^.SortIndex = -1) then
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Result := GreaterThanValue
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else if (nodeInfo1^.SortIndex = -1) and (nodeInfo2^.SortIndex > -1) then
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Result := LessThanValue
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else if (nodeInfo1^.SortIndex = nodeInfo2^.SortIndex) then
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Result := CompareValue(nodeInfo1^.OriginalIndex, nodeInfo2^.OriginalIndex)
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else
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Result := CompareValue(nodeInfo1^.SortIndex, nodeInfo2^.SortIndex);
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end;
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procedure XSDValidate(AParent: IXMLNode; ARecurse, AValidateParent: Boolean);
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var
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validate: IXSDValidate;
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childIndex: Integer;
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begin
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if AValidateParent and Supports(AParent, IXSDValidate, validate) then
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validate.XSDValidate;
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if ARecurse then
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begin
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for childIndex := 0 to Pred(AParent.ChildNodes.Count) do
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XSDValidate(AParent.ChildNodes[childIndex], ARecurse, True);
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end;
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end;
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procedure CreateRequiredElements(AParent: IXMLNode; ANodes: array of string);
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var
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nodeIndex: Integer;
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node: IXMLNode;
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begin
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for nodeIndex := Low(ANodes) to High(ANodes) do
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begin
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if not Assigned(AParent.ChildNodes.FindNode(ANodes[nodeIndex])) then
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begin
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node := AParent.OwnerDocument.CreateElement(ANodes[nodeIndex], AParent.NamespaceURI);
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AParent.ChildNodes.Add(node);
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end;
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end;
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end;
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procedure CreateRequiredAttributes(AParent: IXMLNode; ANodes: array of string);
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var
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nodeIndex: Integer;
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begin
|
||||
for nodeIndex := Low(ANodes) to High(ANodes) do
|
||||
begin
|
||||
if not Assigned(AParent.AttributeNodes.FindNode(ANodes[nodeIndex])) then
|
||||
AParent.Attributes[ANodes[nodeIndex]] := '';
|
||||
end;
|
||||
end;
|
||||
|
||||
|
||||
procedure SortChildNodes(AParent: IXMLNode; ASortOrder: array of string);
|
||||
var
|
||||
sortList: TList;
|
||||
nodeInfo: PSortNodeInfo;
|
||||
childIndex: Integer;
|
||||
sortIndex: Integer;
|
||||
node: IXMLNode;
|
||||
|
||||
begin
|
||||
sortList := TList.Create;
|
||||
try
|
||||
{ Build a list of the child nodes, with their original index and the
|
||||
index in the ASortOrder array. }
|
||||
for childIndex := 0 to Pred(AParent.ChildNodes.Count) do
|
||||
begin
|
||||
New(nodeInfo);
|
||||
nodeInfo^.Node := AParent.ChildNodes[childIndex];
|
||||
nodeInfo^.OriginalIndex := childIndex;
|
||||
|
||||
for sortIndex := Low(ASortOrder) to High(ASortOrder) do
|
||||
begin
|
||||
if ASortOrder[sortIndex] = nodeInfo^.Node.NodeName then
|
||||
begin
|
||||
nodeInfo^.SortIndex := sortIndex;
|
||||
Break;
|
||||
end;
|
||||
end;
|
||||
|
||||
sortList.Add(nodeInfo);
|
||||
end;
|
||||
|
||||
sortList.Sort(DoSortNodes);
|
||||
|
||||
{ Rebuild the ChildNodes list }
|
||||
for childIndex := 0 to Pred(sortList.Count) do
|
||||
begin
|
||||
node := PSortNodeInfo(sortList[childIndex])^.Node;
|
||||
|
||||
AParent.ChildNodes.Remove(node);
|
||||
AParent.ChildNodes.Insert(childIndex, node);
|
||||
end;
|
||||
finally
|
||||
for sortIndex := 0 to Pred(sortList.Count) do
|
||||
Dispose(PSortNodeInfo(sortList[sortIndex]));
|
||||
|
||||
FreeAndNil(sortList);
|
||||
end;
|
||||
end;
|
||||
|
||||
|
||||
{ --- JclMime implementation from here. }
|
||||
// Caution: For MimeEncodeStream and all other kinds of multi-buffered
|
||||
// Mime encodings (i.e. Files etc.), BufferSize must be set to a multiple of 3.
|
||||
// Even though the implementation of the Mime decoding routines below
|
||||
// do not require a particular buffer size, they work fastest with sizes of
|
||||
// multiples of four. The chosen size is a multiple of 3 and of 4 as well.
|
||||
// The following numbers are, in addition, also divisible by 1024:
|
||||
// $2400, $3000, $3C00, $4800, $5400, $6000, $6C00.
|
||||
|
||||
const
|
||||
BUFFER_SIZE = $3000;
|
||||
EqualSign = Byte('=');
|
||||
|
||||
MIME_ENCODE_TABLE: array [0..63] of Byte = (
|
||||
65, 66, 67, 68, 69, 70, 71, 72, // 00 - 07
|
||||
73, 74, 75, 76, 77, 78, 79, 80, // 08 - 15
|
||||
81, 82, 83, 84, 85, 86, 87, 88, // 16 - 23
|
||||
89, 90, 97, 98, 99, 100, 101, 102, // 24 - 31
|
||||
103, 104, 105, 106, 107, 108, 109, 110, // 32 - 39
|
||||
111, 112, 113, 114, 115, 116, 117, 118, // 40 - 47
|
||||
119, 120, 121, 122, 48, 49, 50, 51, // 48 - 55
|
||||
52, 53, 54, 55, 56, 57, 43, 47); // 56 - 63
|
||||
|
||||
MIME_DECODE_TABLE: array [Byte] of Cardinal = (
|
||||
255, 255, 255, 255, 255, 255, 255, 255, // 00 - 07
|
||||
255, 255, 255, 255, 255, 255, 255, 255, // 08 - 15
|
||||
255, 255, 255, 255, 255, 255, 255, 255, // 16 - 23
|
||||
255, 255, 255, 255, 255, 255, 255, 255, // 24 - 31
|
||||
255, 255, 255, 255, 255, 255, 255, 255, // 32 - 39
|
||||
255, 255, 255, 62, 255, 255, 255, 63, // 40 - 47
|
||||
52, 53, 54, 55, 56, 57, 58, 59, // 48 - 55
|
||||
60, 61, 255, 255, 255, 255, 255, 255, // 56 - 63
|
||||
255, 0, 1, 2, 3, 4, 5, 6, // 64 - 71
|
||||
7, 8, 9, 10, 11, 12, 13, 14, // 72 - 79
|
||||
15, 16, 17, 18, 19, 20, 21, 22, // 80 - 87
|
||||
23, 24, 25, 255, 255, 255, 255, 255, // 88 - 95
|
||||
255, 26, 27, 28, 29, 30, 31, 32, // 96 - 103
|
||||
33, 34, 35, 36, 37, 38, 39, 40, // 104 - 111
|
||||
41, 42, 43, 44, 45, 46, 47, 48, // 112 - 119
|
||||
49, 50, 51, 255, 255, 255, 255, 255, // 120 - 127
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255,
|
||||
255, 255, 255, 255, 255, 255, 255, 255);
|
||||
|
||||
type
|
||||
PByte4 = ^TByte4;
|
||||
TByte4 = packed record
|
||||
B1: Byte;
|
||||
B2: Byte;
|
||||
B3: Byte;
|
||||
B4: Byte;
|
||||
end;
|
||||
|
||||
PByte3 = ^TByte3;
|
||||
TByte3 = packed record
|
||||
B1: Byte;
|
||||
B2: Byte;
|
||||
B3: Byte;
|
||||
end;
|
||||
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
// Wrapper functions & procedures
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeEncodeString(const S: AnsiString): AnsiString;
|
||||
var
|
||||
L: Cardinal;
|
||||
begin
|
||||
L := Length(S);
|
||||
if L > 0 then
|
||||
begin
|
||||
SetLength(Result, MimeEncodedSize(L));
|
||||
MimeEncode(PChar(S)^, L, PChar(Result)^);
|
||||
end
|
||||
else
|
||||
Result := '';
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeDecodeString(const S: AnsiString): AnsiString;
|
||||
var
|
||||
ByteBuffer, ByteBufferSpace: Cardinal;
|
||||
L: Cardinal;
|
||||
begin
|
||||
L := Length(S);
|
||||
if L > 0 then
|
||||
begin
|
||||
SetLength(Result, MimeDecodedSize(L));
|
||||
ByteBuffer := 0;
|
||||
ByteBufferSpace := 4;
|
||||
L := MimeDecodePartial(PChar(S)^, L, PChar(Result)^, ByteBuffer, ByteBufferSpace);
|
||||
Inc(L, MimeDecodePartialEnd(PChar(Cardinal(Result) + L)^, ByteBuffer, ByteBufferSpace));
|
||||
SetLength(Result, L);
|
||||
end;
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
procedure MimeEncodeStream(const InputStream: TStream; const OutputStream: TStream);
|
||||
var
|
||||
InputBuffer: array [0..BUFFER_SIZE - 1] of Byte;
|
||||
OutputBuffer: array [0..((BUFFER_SIZE + 2) div 3) * 4 - 1] of Byte;
|
||||
BytesRead: Integer;
|
||||
begin
|
||||
BytesRead := InputStream.Read(InputBuffer, SizeOf(InputBuffer));
|
||||
while BytesRead > 0 do
|
||||
begin
|
||||
MimeEncode(InputBuffer, BytesRead, OutputBuffer);
|
||||
OutputStream.Write(OutputBuffer, MimeEncodedSize(BytesRead));
|
||||
BytesRead := InputStream.Read(InputBuffer, SizeOf(InputBuffer));
|
||||
end;
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
procedure MimeDecodeStream(const InputStream: TStream; const OutputStream: TStream);
|
||||
var
|
||||
ByteBuffer, ByteBufferSpace: Cardinal;
|
||||
InputBuffer: array [0..(BUFFER_SIZE + 3) div 4 * 3 - 1] of Byte;
|
||||
OutputBuffer: array [0..BUFFER_SIZE - 1] of Byte;
|
||||
BytesRead: Integer;
|
||||
begin
|
||||
ByteBuffer := 0;
|
||||
ByteBufferSpace := 4;
|
||||
BytesRead := InputStream.Read(InputBuffer, SizeOf(InputBuffer));
|
||||
while BytesRead > 0 do
|
||||
begin
|
||||
OutputStream.Write(OutputBuffer, MimeDecodePartial(InputBuffer, BytesRead, OutputBuffer, ByteBuffer, ByteBufferSpace));
|
||||
BytesRead := InputStream.Read(InputBuffer, SizeOf(InputBuffer));
|
||||
end;
|
||||
OutputStream.Write(OutputBuffer, MimeDecodePartialEnd(OutputBuffer, ByteBuffer, ByteBufferSpace));
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
// Helper functions
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeEncodedSize(const I: Cardinal): Cardinal;
|
||||
begin
|
||||
Result := (I + 2) div 3 * 4;
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeDecodedSize(const I: Cardinal): Cardinal;
|
||||
begin
|
||||
Result := (I + 3) div 4 * 3;
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
// Primary functions & procedures
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
procedure MimeEncode(var InputBuffer; const InputByteCount: Cardinal; var OutputBuffer);
|
||||
var
|
||||
B: Cardinal;
|
||||
InMax3: Cardinal;
|
||||
InPtr, InLimitPtr: ^Byte;
|
||||
OutPtr: PByte4;
|
||||
begin
|
||||
if InputByteCount <= 0 then
|
||||
Exit;
|
||||
|
||||
InPtr := @InputBuffer;
|
||||
InMax3 := InputByteCount div 3 * 3;
|
||||
OutPTr := @OutputBuffer;
|
||||
Cardinal(InLimitPtr) := Cardinal(InPtr) + InMax3;
|
||||
|
||||
while InPtr <> InLimitPtr do
|
||||
begin
|
||||
B := InPtr^;
|
||||
B := B shl 8;
|
||||
Inc(InPtr);
|
||||
B := B or InPtr^;
|
||||
B := B shl 8;
|
||||
Inc(InPtr);
|
||||
B := B or InPtr^;
|
||||
Inc(InPtr);
|
||||
// Write 4 bytes to OutputBuffer (in reverse order).
|
||||
OutPtr.B4 := MIME_ENCODE_TABLE[B and $3F];
|
||||
B := B shr 6;
|
||||
OutPtr.B3 := MIME_ENCODE_TABLE[B and $3F];
|
||||
B := B shr 6;
|
||||
OutPtr.B2 := MIME_ENCODE_TABLE[B and $3F];
|
||||
B := B shr 6;
|
||||
OutPtr.B1 := MIME_ENCODE_TABLE[B];
|
||||
Inc(OutPtr);
|
||||
end;
|
||||
|
||||
case InputByteCount - InMax3 of
|
||||
1:
|
||||
begin
|
||||
B := InPtr^;
|
||||
B := B shl 4;
|
||||
OutPtr.B2 := MIME_ENCODE_TABLE[B and $3F];
|
||||
B := B shr 6;
|
||||
OutPtr.B1 := MIME_ENCODE_TABLE[B];
|
||||
OutPtr.B3 := EqualSign; // Fill remaining 2 bytes.
|
||||
OutPtr.B4 := EqualSign;
|
||||
end;
|
||||
2:
|
||||
begin
|
||||
B := InPtr^;
|
||||
Inc(InPtr);
|
||||
B := B shl 8;
|
||||
B := B or InPtr^;
|
||||
B := B shl 2;
|
||||
OutPtr.B3 := MIME_ENCODE_TABLE[B and $3F];
|
||||
B := B shr 6;
|
||||
OutPTr.b2 := MIME_ENCODE_TABLE[B and $3F];
|
||||
B := B shr 6;
|
||||
OutPtr.B1 := MIME_ENCODE_TABLE[B];
|
||||
OutPtr.B4 := EqualSign; // Fill remaining byte.
|
||||
end;
|
||||
end;
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeDecode(var InputBuffer; const InputBytesCount: Cardinal; var OutputBuffer): Cardinal;
|
||||
var
|
||||
ByteBuffer, ByteBufferSpace: Cardinal;
|
||||
begin
|
||||
ByteBuffer := 0;
|
||||
ByteBufferSpace := 4;
|
||||
Result := MimeDecodePartial(InputBuffer, InputBytesCount, OutputBuffer, ByteBuffer, ByteBufferSpace);
|
||||
Inc(Result, MimeDecodePartialEnd(PChar(Cardinal(OutputBuffer) + Result)^, ByteBuffer, ByteBufferSpace));
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeDecodePartial(var InputBuffer; const InputBytesCount: Cardinal;
|
||||
var OutputBuffer; var ByteBuffer: Cardinal; var ByteBufferSpace: Cardinal): Cardinal;
|
||||
var
|
||||
lByteBuffer, lByteBufferSpace, C: Cardinal;
|
||||
InPtr, InLimitPtr: ^Byte;
|
||||
OutPtr: PByte3;
|
||||
begin
|
||||
if InputBytesCount > 0 then
|
||||
begin
|
||||
InPtr := @InputBuffer;
|
||||
Cardinal(InLimitPtr) := Cardinal(InPtr) + InputBytesCount;
|
||||
OutPtr := @OutputBuffer;
|
||||
lByteBuffer := ByteBuffer;
|
||||
lByteBufferSpace := ByteBufferSpace;
|
||||
while InPtr <> InLimitPtr do
|
||||
begin
|
||||
C := MIME_DECODE_TABLE[InPtr^]; // Read from InputBuffer.
|
||||
Inc(InPtr);
|
||||
if C = $FF then
|
||||
Continue;
|
||||
|
||||
lByteBuffer := lByteBuffer shl 6;
|
||||
lByteBuffer := lByteBuffer or C;
|
||||
Dec(lByteBufferSpace);
|
||||
if lByteBufferSpace <> 0 then
|
||||
Continue; // Read 4 bytes from InputBuffer?
|
||||
|
||||
OutPtr.B3 := Byte(lByteBuffer); // Write 3 bytes to OutputBuffer (in reverse order).
|
||||
lByteBuffer := lByteBuffer shr 8;
|
||||
OutPtr.B2 := Byte(lByteBuffer);
|
||||
lByteBuffer := lByteBuffer shr 8;
|
||||
OutPtr.B1 := Byte(lByteBuffer);
|
||||
lByteBuffer := 0;
|
||||
Inc(OutPtr);
|
||||
lByteBufferSpace := 4;
|
||||
end;
|
||||
ByteBuffer := lByteBuffer;
|
||||
ByteBufferSpace := lByteBufferSpace;
|
||||
Result := Cardinal(OutPtr) - Cardinal(@OutputBuffer);
|
||||
end
|
||||
else
|
||||
Result := 0;
|
||||
end;
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function MimeDecodePartialEnd(var OutputBuffer; const ByteBuffer: Cardinal;
|
||||
const ByteBufferSpace: Cardinal): Cardinal;
|
||||
var
|
||||
lByteBuffer: Cardinal;
|
||||
begin
|
||||
case ByteBufferSpace of
|
||||
1:
|
||||
begin
|
||||
lByteBuffer := ByteBuffer shr 2;
|
||||
PByte3(@OutputBuffer).B2 := Byte(lByteBuffer);
|
||||
lByteBuffer := lByteBuffer shr 8;
|
||||
PByte3(@OutputBuffer).B1 := Byte(lByteBuffer);
|
||||
Result := 2;
|
||||
end;
|
||||
2:
|
||||
begin
|
||||
lByteBuffer := ByteBuffer shr 4;
|
||||
PByte3(@OutputBuffer).B1 := Byte(lByteBuffer);
|
||||
Result := 1;
|
||||
end;
|
||||
else
|
||||
Result := 0;
|
||||
end;
|
||||
end;
|
||||
|
||||
end.
|
||||
|
Loading…
Reference in New Issue
Block a user