9ba5e3e952
* include/hbextern.ch
* source/rtl/Makefile
+ source/rtl/base64c.c
+ source/rtl/base64.prg
+ Added HB_BASE64ENCODE(), HB_BASE64DECODE() to core.
They were copied from hbtip and hbvpdf and currently
the decoder is .prg code while encoding is .c code.
Latter has one TOFIX for an error situation.
* contrib/hbtip/encurl.prg
* contrib/hbtip/thtml.prg
* contrib/hbtip/sessid.prg
* contrib/hbtip/popcln.prg
* contrib/hbtip/sendmail.prg
* contrib/hbtip/tip.ch
* contrib/hbtip/cgi.prg
* contrib/hbtip/url.prg
* contrib/hbtip/encqp.prg
* contrib/hbtip/base64x.c
* contrib/hbtip/httpcln.prg
* contrib/hbtip/client.prg
* contrib/hbtip/encoder.prg
* contrib/hbtip/smtpcln.prg
* contrib/hbtip/encb64.prg
* contrib/hbtip/mail.prg
* contrib/hbtip/credent.prg
* contrib/hbtip/ftpcln.prg
+ Added TOFIXes, QUESTIONs
! Fixed to use hb_MemoRead() instead of MemoRead() in one place.
! Fixed a wrong error checks after FCreate() calls.
! Fixed to use Len( hb_inetCRLF ) instead of hardwired length.
! Using hb_ntos() instead of Str() in POP3 commands.
* Changed explicit values to manifest constants (F_ERROR)
* Changed high ASCII chars in source to Chr() representation,
now source can be edited with any editor.
! Added missing copyright header to tip.ch. Although this header
seems to be unnecessary.
! TipMail:MakeBoundary() to not add any date punctuations in the ID.
! Fixed tIPClientFTP:fileSize() to not return permantent zero.
% Heavier optimizations and cleanup in TIpClientSmtp().
% Optimizations.
* Formatting.
; Please test.
120 lines
4.3 KiB
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120 lines
4.3 KiB
Plaintext
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* HB_BASE64DECODE() function
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*
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* Based on VB code by: 1999-2004 Antonin Foller, http://www.motobit.com, http://motobit.cz
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* Converted to Clipper and optimized by Viktor Szakats (harbour.01 syenar.hu)
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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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. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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FUNCTION HB_BASE64DECODE( cString )
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LOCAL cResult
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LOCAL nLen
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LOCAL nGroupPos
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LOCAL nGroup
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LOCAL nCharPos
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LOCAL nDataLen
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LOCAL nData
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/* remove white spaces, If any */
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cString := StrTran( cString, Chr( 10 ) )
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cString := StrTran( cString, Chr( 13 ) )
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cString := StrTran( cString, Chr( 9 ) )
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cString := StrTran( cString, " " )
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/* The source must consists from groups with Len of 4 chars */
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IF ( nLen := Len( cString ) ) % 4 != 0
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RETURN "" /* Bad Base64 string */
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ENDIF
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#if 0
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IF nLen > Int( MAXSTRINGLENGTH / 1.34 ) /* Base64 is 1/3rd larger than source text. */
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RETURN "" /* Not enough memory to decode */
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ENDIF
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#endif
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cResult := ""
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/* Now decode each group: */
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FOR nGroupPos := 1 TO nLen STEP 4
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/* Each data group encodes up To 3 actual bytes */
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nDataLen := 3
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nGroup := 0
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FOR nCharPos := 0 TO 3
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/* Convert each character into 6 bits of data, And add it To
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an integer For temporary storage. If a character is a '=', there
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is one fewer data byte. (There can only be a maximum of 2 '=' In
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the whole string.) */
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nData := At( SubStr( cString, nGroupPos + nCharPos, 1 ), "=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" ) - 2
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DO CASE
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CASE nData >= 0
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/* Do nothing (for speed) */
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CASE nData == -1
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nData := 0
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nDataLen--
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CASE nData == -2
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RETURN "" /* Bad character In Base64 string */
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ENDCASE
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nGroup := 64 * nGroup + nData
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NEXT
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/* Convert the 24 bits to 3 characters
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and add nDataLen characters To out string */
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cResult += Left( Chr( nGroup / 65536 ) +; /* bitwise AND 255, which is done by Chr() automatically */
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Chr( nGroup / 256 ) +; /* bitwise AND 255, which is done by Chr() automatically */
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Chr( nGroup ), nDataLen ) /* bitwise AND 255, which is done by Chr() automatically */
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NEXT
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RETURN cResult
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