Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!iuvax!uxc.cso.uiuc.edu!uxc.cso.uiuc.edu!m.cs.uiuc.edu!s.cs.uiuc.edu!carroll
From: carroll@s.cs.uiuc.edu
Newsgroups: comp.windows.x
Subject: Re: Free data from XGetWindowProperty
Message-ID: <216500010@s.cs.uiuc.edu>
Date: 22 Jun 89 20:24:00 GMT
References: <3174@ncsuvx.ncsu.edu>
Lines: 20
Nf-ID: #R:ncsuvx.ncsu.edu:3174:s.cs.uiuc.edu:216500010:000:1086
Nf-From: s.cs.uiuc.edu!carroll    Jun 22 15:24:00 1989


RE: XFreeFont() vs. XFreeFontInfo()

Apparently I stated myself badly originally. The statement "the manual says
to use XFreeFontInfo()" is on page 94, "Xlib - C Library  X11, Release 3"
under the function XQueryFont(), where it says
		"To free this data, use XFreeFontInfo()"

I can't use XFreeFont(), because what I want to free is the _info_, not the
font. I use XLoadQueryFont(), which does an implicit XQueryFont() (which is
why the above section is relevant). I then copy over the bits that I need, and
want to dump the _info_ structure because I'm done with it. The key question
is, "If I use XQueryFont() (either directly or through XLoadQueryFont()),
instead of XListFontsWithInfo(), what do I pass for the names argument in
XFreeFontInfo()?". rws told me that the answer is NULL, with an actual_count
of 1. I submit that this is non-obvious from reading the manual.

Alan M. Carroll                "And there you are
carroll@s.cs.uiuc.edu           Saying 'We have the Moon, so now the Stars...'"
CS Grad / U of Ill @ Urbana    ...{ucbvax,pur-ee,convex}!s.cs.uiuc.edu!carroll