BASE64 DECODE

[BackupUser]

Restored from previous forum. Originally posted by Num3.


Well PB encodes to base64...

And what about decoding a b64 file/string ???

--
Kind Regards

Rui Carvalho

Current PB Projects:
[Construdata 2003 - 30%]
[Step by Step - 50%]

[BackupUser]

Restored from previous forum. Originally posted by Franco.

To clear things up: this is not my code!

Found this some time ago in the german forum, don't recall who did this.
(Shame on me, forgot to write it down...)

The only change I did, was to change the input data from a pointer to a string - now it's equal to the encoding command in pb.

Code: Select all

Procedure Base64Decoder(b64in$, b64len.l ,*b64out, b64max.l)
  *b64in.l = @b64in$ ;  0
        If b64num = 65
          b64pad +1
        EndIf
        b64bin$ +Right("000000" + Bin(b64num-1),6)   ;24 Bit code
      Else
        b64err = 1
        b64xln = b64tln +1
      EndIf
    Next b64xb

    For b64xu = 0 To 2-b64pad
      b64bit$ = Mid(b64bin$,1+b64xu*8,8) + "|"
      b64num = FindString(b64asc$,b64bit$,0) /9     ;ASC Code 8 Bit Binary
      PokeS(*b64out+b64buf,Chr(b64Num))
      b64buf +1
      If b64buf >b64max
        b64err = 1
        b64xln = b64tln +1
      EndIf
    Next b64xu

  Next b64xln

  If b64err = 1
    RtlFillMemory_(*b64out,b64max,0)
    b64buf = -1
  EndIf
  ProcedureReturn b64buf
EndProcedure 

Have a nice day...

Franco

[TronDoc]

=

Code: Select all

8)

--jb


b64asc$ = b64asc$ + Right("0000000" + Bin(b64x),8) + "|"

Code: Select all

  For b64x = 0 To 255
    b64asc$ = b64asc$ + Right("0000000" + Bin(b64x),8) + "|"               ;ASC Binary Code
  Next b64x

b64bit$ = Mid(b64bin$,1+b64xu*8,8) + "|"

Code: Select all

    For b64xu = 0 To 2-b64pad
      b64bit$ = Mid(b64bin$,1+b64xu*8,8) + "|"
      b64num = FindString(b64asc$,b64bit$,0) /9     ;ASC Code 8 Bit Binary
      PokeS(*b64out+b64buf,Chr(b64Num))
      b64buf +1
      If b64buf >b64max
        b64err = 1
        b64xln = b64tln +1
      EndIf
    Next b64xu

[fsw]

Suppose this will not be the last funny transition code we will see...

Franco

[freak]

Is it better like this?

The smileys can be disabled in the posts btw.

Timo

[TronDoc]