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From: barb@hpfcms.UUCP
Newsgroups: net.unix-wizards
Subject: Re: _print/_doprnt; curses on sys III
Message-ID: <25900003@hpfcms.UUCP>
Date: Wed, 13-Jun-84 17:20:00 EDT
Article-I.D.: hpfcms.25900003
Posted: Wed Jun 13 17:20:00 1984
Date-Received: Wed, 27-Jun-84 19:45:29 EDT
References: <148@gargoyle.UUCP>
Organization: Hewlett-Packard Fort Collins Systems Division - Fort Collins, CO
Lines: 27
Nf-ID: #R:gargoyle:-14800:hpfcms:25900003:000:1164
Nf-From: hpfcms!barb    Jun 20 13:20:00 1984



There are two different source files shipped for printf with System III.
One version of printf()  uses doprnt.  doprnt is written in vax assembly
language.  The  second  version  of  printf()  uses  _print.  _print  is
written  in C.  Thus, the  HP9000  series  500 and  series  200 used the
source for _print.

The  arguments  to _print  are  _print(format,  args).  format is a char
pointer to the format  string and args is a char  pointer to the list of
arguments to be printed.  A global  variable _pfile (FILE *) must be set
to the stream pointer  associated  with the file to be written on before
calling _print.

System  V.2 now uses  only  doprnt  for  printf().  They ship both a vax
assembly  language  version  and a C  version.  The 4.0  release  of the
Series 500 and 2.1 release of the Series 200 (both to be  released  late
this summer) will use System V.2 doprnt.

_print and  doprint are not valid user entry points and  are explicitly 
undocumented  both by HP9000 and by Bell because  their interface is 
subject to change in future releases.


Barbara Flahive, Technical Support
Hewlett-Packard  -  Ft.Collins, CO
{hplabs,ihnp4}!hpfcla!barb