Re: simple question: are const gchar* arguments hold as copies internally?
- From: Felix Kater <f kater2 gmx net>
- To: Tristan Van Berkom <tvb gnome org>
- Cc: gtk-app-devel-list gnome org
- Subject: Re: simple question: are const gchar* arguments hold as copies internally?
- Date: Wed, 7 Sep 2005 11:36:43 +0200
Tristan Van Berkom <tvb gnome org> wrote:
Generally,
if a function takes `const gchar *' as an argument it just means
that the said function garauntees that your string will not be modified
by that function (whereas a `gchar *' argument is generally a return
location for a single char).
Here are some examples in GTK+ that do use static strings:
http://developer.gnome.org/doc/API/2.0/gobject/gobject-Standard-Parameter-and-Value-Types.html#g-value-set-static-string
http://developer.gnome.org/doc/API/2.0/glib/glib-Quarks.html#g-quark-from-static-string
Excellent.
So, I sum up:
a. If the programmer wants to make clear that a string argument of a
function is not changed internally she designs it as a const gchar*.
b. If the programmer wants to make clear that a function expects the
string pointer to not be changed outside she has to mark that by
additional keywords like "_from_static_string" in the function's name.
Felix
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