MT Decode URL : Source

Source

--- This source is written in HyperTalk for CompileIt!

global theAEEvent:R,theReply:R, handerRefCon:LongInt
global myCounter:LongInt, myLen:LongInt, myWCounter:LongInt

codeResource "osax"

pascal function DecodeURL:I theAEEvent:R, theReply:R, handerRefCon:L

  put NewPtr(8) into myDescPtr

  put AEGetParamDesc(theAEEvent@,keyDirectObject,typeChar,myDescPtr@) into err
  if err <> 0 then
    DisposPtr myDescPtr
    return err
  end if

  put myDescPtr@.dataHandle into myStrHandle
  put GetHandleSize(myStrHandle) into myLen
  ---
  if myLen < 3 then
    if theReply@.descriptorType <> typeNull then
      put AEPutParamDesc(theReply@, keyDirectObject,myDescPtr@) into err
    end if
    put AEDisposeDesc(myDescPtr@) into xerr
    DisposPtr myDescPtr
    return 0
  end if
  ---

  put 0 into myCounter
  put 0 into myWCounter

  put myLen - 1 into myLen
  put myLen - 1 into sLimit

  repeat

    if myCounter > myLen then
      exit repeat
    end if

    put CharToNum(myStrHandle@@.charType[myCounter]) into tgX

    if tgX = 43 then
      put NumToChar(32) into myStrHandle@@.charType[myWCounter]
      add 1 to myCounter
      add 1 to myWCounter
      next repeat

    else if tgX = 37 and (myCounter < sLimit) then

      put CharToNum(myStrHandle@@.charType[myCounter+1]) into tgy
      put CharToNum(myStrHandle@@.charType[myCounter+2]) into tgz

      put HexToDexer(tgy) into digA
      put HexToDexer(tgz) into digB

      if tgy <> digA and tgz <> digB then

        put (digA*16)+digB into zzz
        put NumToChar(zzz) into myStrHandle@@.charType[myWCounter]
        add 3 to myCounter
        add 1 to myWCounter
        next repeat

      else
        put NumToChar(tgX) into myStrHandle@@.charType[myWCounter]
        add 1 to myCounter
        add 1 to myWCounter
        next repeat

      end if

    else
      put NumToChar(tgX) into myStrHandle@@.charType[myWCounter]
      add 1 to myCounter
      add 1 to myWCounter
      next repeat
    end if

  end repeat

  ----

  SetHandleSize myStrHandle,myWCounter
  put MemError() into err

  if err = 0 and theReply@.descriptorType <> typeNull then
    put AEPutParamDesc(theReply@, keyDirectObject,myDescPtr@) into err
  end if

  put AEDisposeDesc(myDescPtr@) into xerr
  DisPosPtr myDescPtr

  return err

end DecodeURL


function HexToDexer tgNm

  if 48 <= tgNm and tgNm <= 57 then
    return (tgNm-48)
  else if 65 <= tgNm and tgNm <= 70 then
    return (tgNm-55)
  else if 97 <= tgNm and tgNm <= 102 then
    return (tgNm-87)
  end if

  return tgNm
end HexToDexer