4ac8b874cf
base64 encoded support + tests new tests for schema parsers : complex type extending simple type git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@303 8e941d3f-bd1b-0410-a28a-d453659cc2b4
176 lines
6.2 KiB
ObjectPascal
176 lines
6.2 KiB
ObjectPascal
{ This file is part of the Web Service Toolkit
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Copyright (c) 2006, 2007 by Inoussa OUEDRAOGO
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This file is provide under modified LGPL licence
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( the files COPYING.modifiedLGPL and COPYING.LGPL).
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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}
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{$INCLUDE wst_global.inc}
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{$RANGECHECKS OFF}
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unit basex_encode;
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interface
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uses
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SysUtils, wst_types;
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type
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EBaseXException = class(Exception);
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EBase64Exception = class(EBaseXException);
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TBaseXOption = ( xoDecodeIgnoreIllegalChar );
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TBaseXOptions = set of TBaseXOption;
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function Base64Encode(const ALength : PtrInt; const AInBuffer) : string;overload;
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function Base64Encode(const AInBuffer : string) : string;overload;
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function Base64Decode(const AInBuffer : string; const AOptions : TBaseXOptions = [xoDecodeIgnoreIllegalChar]) : string;
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resourcestring
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s_InvalidEncodedData = 'Invalid encoded data.';
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s_IllegalChar = 'Illegal character for that encoding : %s.';
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implementation
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const
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Base64_CHAR_TABLE : array[0..63] of char = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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IM = 255; INVALID_MARKER = IM;
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Base64_CHAR_INDEX_TABLE : array[Byte] of Byte = (
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,62,IM,IM,IM,63,
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52,53,54,55,56,57,58,59,60,61,IM,IM,IM,00,IM,IM,
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IM,00,01,02,03,04,05,06,07,08,09,10,11,12,13,14,
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15,16,17,18,19,20,21,22,23,24,25,IM,IM,IM,IM,IM,
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IM,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
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41,42,43,44,45,46,47,48,49,50,51,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,
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IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM,IM
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);
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Base64_CHAR_SET = ['A'..'Z','a'..'z','0'..'9','+','/'];
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function Base64Encode(const ALength : PtrInt; const AInBuffer) : string;
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var
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locBuffer : PByte;
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locCopied, locBlockCount, i, locAtualLen : PtrInt;
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locInQuantom : array[0..2] of Byte;
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locOutQuantom : array[0..3] of Char;
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begin
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Result := '';
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if ( ALength > 0 ) then begin
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locBuffer := @AInBuffer;
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locBlockCount := ALength div 3;
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SetLength(Result,(locBlockCount + 1 ) * 4);
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locAtualLen := 0;
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for i := 1 to locBlockCount do begin
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Move(locBuffer^,locInQuantom[0],3);
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Inc(locBuffer,3);
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locOutQuantom[0] := Base64_CHAR_TABLE[( locInQuantom[0] shr 2 )];
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locOutQuantom[1] := Base64_CHAR_TABLE[( ( locInQuantom[0] and 3 ) shl 4 ) or ( locInQuantom[1] shr 4 )];
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locOutQuantom[2] := Base64_CHAR_TABLE[( ( locInQuantom[1] and 15 ) shl 2 ) or ( locInQuantom[2] shr 6 )];
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locOutQuantom[3] := Base64_CHAR_TABLE[( locInQuantom[2] and 63 )];
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Move(locOutQuantom[0],Result[locAtualLen + 1],4);
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Inc(locAtualLen,4);
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end;
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locCopied := ALength mod 3;
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if ( locCopied > 0 ) then begin
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case locCopied of
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1 :
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begin
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Move(locBuffer^,locInQuantom[0],1);
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locInQuantom[1] := 0;
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locOutQuantom[0] := Base64_CHAR_TABLE[( locInQuantom[0] shr 2 )];
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locOutQuantom[1] := Base64_CHAR_TABLE[( ( locInQuantom[0] and 3 ) shl 4 ) or ( locInQuantom[1] shr 4 )];
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locOutQuantom[2] := '=';
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locOutQuantom[3] := '=';
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end;
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2 :
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begin
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Move(locBuffer^,locInQuantom[0],2);
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locInQuantom[2] := 0;
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locOutQuantom[0] := Base64_CHAR_TABLE[( locInQuantom[0] shr 2 )];
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locOutQuantom[1] := Base64_CHAR_TABLE[( ( locInQuantom[0] and 3 ) shl 4 ) or ( locInQuantom[1] shr 4 )];
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locOutQuantom[2] := Base64_CHAR_TABLE[( ( locInQuantom[1] and 15 ) shl 2 ) or ( locInQuantom[2] shr 6 )];
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locOutQuantom[3] := '=';
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end;
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end;
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Move(locOutQuantom[0],Result[locAtualLen + 1],4);
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Inc(locAtualLen,4);
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end;
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SetLength(Result,locAtualLen);
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end;
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end;
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function Base64Encode(const AInBuffer : string) : string;
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begin
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if ( Length(AInBuffer) = 0 ) then
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Result := ''
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else
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Result := Base64Encode(Length(AInBuffer),AInBuffer[1]);
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end;
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function Base64Decode(const AInBuffer : string; const AOptions : TBaseXOptions) : string;
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var
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locBuffer : PByte;
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locInLen, locInIndex, i, locPadded : PtrInt;
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locOutQuantom : array[0..2] of Byte;
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locInQuantom : array[0..3] of Byte;
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ok : Boolean;
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locAtualLen : PtrInt;
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locInValue : Byte;
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locFailOnIllegalChar : Boolean;
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begin
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if ( AInBuffer = '' ) then begin
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Result := '';
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end else begin
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locInIndex := 0;
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locAtualLen := 0;
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locPadded := 0;
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locInLen := Length(AInBuffer);
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SetLength(Result,locInLen);
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locBuffer := @(AInBuffer[1]);
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locFailOnIllegalChar := not ( xoDecodeIgnoreIllegalChar in AOptions );
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while ( locInIndex < locInLen ) do begin
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for i := 0 to 3 do begin
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ok := False;
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while ( locInIndex <= locInLen ) do begin
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locInValue := Base64_CHAR_INDEX_TABLE[locBuffer^];
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Inc(locBuffer);
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Inc(locInIndex);
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if ( locInValue <> INVALID_MARKER ) then begin
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locInQuantom[i] := locInValue;
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if ( locBuffer^ = Byte('=') ) then begin
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Inc(locPadded);
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end;
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ok := True;
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Break;
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end else begin
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if locFailOnIllegalChar then
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raise EBase64Exception.Create(s_InvalidEncodedData);
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end;
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end;
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if not ok then
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raise EBase64Exception.CreateFmt(s_IllegalChar,[Char(locBuffer^)]);
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end;
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locOutQuantom[0] := ( locInQuantom[0] shl 2 ) or ( locInQuantom[1] shr 4 );
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locOutQuantom[1] := ( locInQuantom[1] shl 4 ) or ( locInQuantom[2] shr 2 );
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locOutQuantom[2] := ( locInQuantom[2] shl 6 ) or ( locInQuantom[3] );
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Move(locOutQuantom[0],Result[locAtualLen + 1],3 - locPadded);
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Inc(locAtualLen,3 - locPadded);
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end;
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SetLength(Result,locAtualLen);
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end;
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end;
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end.
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