Convert ASCII 850 string into/from ISO 8859-1 (1004) string

 
/* ------------------------------------------------------------------ */
/* function: Convert an ASCII 850 string into an ISO 8859-1           */
/*           (1004) string and vice versa                             */
/*                                                                    */
/* call:     PC_ISOB thisString, outP                                 */
/*                                                                    */
/* where:    thisString - the string to convert                       */
/*           outP - function code, either                             */
/*                    1004 to convert to ISO                          */
/*                  or                                                */
/*                     850 to convert to ASCII                        */
/*                                                                    */
/* output:   the converted string                                     */
/*                                                                    */
/* Notes:    Note that this not a complete codepage conversion.       */
/*           We only care about the letters.                          */
/*                                                                    */
/* Author:   Oliver Heidelbach (see EMail Addresses)                  */
/*                                                                    */
PC_ISO: PROCEDURE

  PARSE ARG thisString, outp

  aISO = 'a1 a2 a3 bf c0 c1 c2 c3 c4 c5 c6 c7 c8 c9 ca cb cc cd ce cf d0',
         'd1 d2 d3 d4 d5 d6 d8 d9 da db dc dd de df e0 e1 e2 e3 e4 e5 e6',
         'e7 e8 e9 ea eb ec ed ee ef f0 f1 f2 f3 f4 f5 f6 f8 f9 fa fb fc',
         'fd fe ff'

  aPC =  'ad bd 9c a8 b7 b5 b6 c7 8e 8f 92 80 d4 90 d2 d3 de d6 d7 d8 d1',
         'a5 d2 d3 d4 e5 99 d8 eb e9 ea 9a ed e8 e1 85 a0 83 c6 84 86 91',
         '87 8a 82 88 89 8d a1 8c 8b d0 a4 95 a2 93 e4 94 9b 97 a3 96 81',
         'ec e7 98'

  if outp = 1004 then
    convbuf = Translate(thisString, X2C(aISO), X2C(aPC))
  else
    if outp = 850 then
      convbuf = Translate(thisString, X2C(aPC), X2C(aISO))

RETURN convbuf