XListExtensions() XListExtensions()
Name
XListExtensions - return a list of all extensions to X supported by the server.
Synopsis
char **XListExtensions(display, nextensions_return)
Display *display;
int *nextensions_return;
Arguments
display Specifies a connection to an X server; returned from XOpenDisplay().
nextensions_return
Returns the number of extensions in the returned list.
Returns
The list of extension name strings.
Description
XListExtensions() lists all the X extensions supported by the current server. If the data returned by the server is in the Latin Portable
Character Encoding, then the returned strings are in the Host Portable Character Encoding. Otherwise, the result is implementation-depen-
dent.
For more information on extensions, see Volume One, Chapter 15, Other Programming Techniques.
See Also
XFreeExtensionList(), XQueryExtension().
Xlib - Extensions XListExtensions()
Check Out this Related Man Page
XQueryExtension(3) X FUNCTIONS XQueryExtension(3)NAME
XQueryExtension, XListExtensions, XFreeExtensionList - list available extensions
SYNTAX
Bool XQueryExtension(display, name, major_opcode_return, first_event_return, first_error_return)
char **XListExtensions(display, nextensions_return)
XFreeExtensionList(list)
ARGUMENTS
display Specifies the connection to the X server.
name Specifies the extension name.
major_opcode_return
Returns the major opcode.
first_event_return
Returns the first event code, if any.
first_error_return
Returns the first error code, if any.
nextensions_return
Returns the number of extensions listed.
list Specifies the list of extension names.
DESCRIPTION
The XQueryExtension function determines if the named extension is present. If the extension is not present, XQueryExtension returns False;
otherwise, it returns True. If the extension is present, XQueryExtension returns the major opcode for the extension to
major_opcode_return; otherwise, it returns zero. Any minor opcode and the request formats are specific to the extension. If the extension
involves additional event types, XQueryExtension returns the base event type code to first_event_return; otherwise, it returns zero. The
format of the events is specific to the extension. If the extension involves additional error codes, XQueryExtension returns the base
error code to first_error_return; otherwise, it returns zero. The format of additional data in the errors is specific to the extension.
If the extension name is not in the Host Portable Character Encoding the result is implementation-dependent. Uppercase and lowercase mat-
ter; the strings ``thing'', ``Thing'', and ``thinG'' are all considered different names.
The XListExtensions function returns a list of all extensions supported by the server. If the data returned by the server is in the Latin
Portable Character Encoding, then the returned strings are in the Host Portable Character Encoding. Otherwise, the result is implementa-
tion-dependent.
The XFreeExtensionList function frees the memory allocated by XListExtensions.
X Version 11 libX11 1.6.0 XQueryExtension(3)
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