Re: Converting characters to hex

[bmorris@xxxxxxxxxx]

>Date: Wed, 2 May 2001 16:29:53 -0400
>From: Jon.Paris@hal.it
>
>Someone commented earlier that they had tried to use C's MI built-ins for
>this but they "didn't work".  Well they do as the program below will
>testify.  Perhaps the gentleman who tried it (like me) foolishly thought
>that cvtch converted characters to hex - that would be _much_ too simple.
>cvthc is the one you need for this.  Use cvtch instead and it blows up
>nicely! (thanks Mel for pointing this out to me).  Also note that it
>appears to be the length of the hex output string that needs to be
>specified not the length of the input.  I'd confirm all this if I had a
>manual handy but ....
>
>     D cvthc           Pr                  Extproc('cvthc')
>     D  receiver                       *   Value
>     D  source                         *   Value
>     D  size                         10i 0 Value

Jon, me too, I've never been able to remember which is h and which
is c.  x'ab' and 'ab' both seem like 'h' to me.  And 'c'.

I can never remember what the size is supposed to be either (it's the
length of the 'c' parm).  So I recommend prototypes for these 2
functions with names like this:

     D cvthex1To2       Pr                  Extproc('cvthc')
     D  longReceiver                   *   Value
     D  shortSource                    *   Value
     D  receiverBytes                10i 0 Value

     D cvthex2To1       Pr                  Extproc('cvtch')
     D  shortReceiver                  *   Value
     D  longSource                     *   Value
     D  sourceBytes                  10i 0 Value

Even then I get a bit confused ...

Barbara Morris


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