XInternAtom(3) XLIB FUNCTIONS XInternAtom(3)
NAME
XInternAtom, XInternAtoms, XGetAtomName, XGetAtomNames - create or re-
turn atom names
SYNTAX
Atom XInternAtom(Display *display, _Xconst char *atom_name, Bool
only_if_exists);
Status XInternAtoms(Display *display, char **names, int count, Bool
only_if_exists, Atom *atoms_return);
char *XGetAtomName(Display *display, Atom atom);
Status XGetAtomNames(Display *display, Atom *atoms, int count, char
**names_return);
ARGUMENTS
atom Specifies the atom for the property name you want returned.
atoms Specifies the array of atoms.
atom_name Specifies the name associated with the atom you want returned.
atoms_return
Returns the atoms.
count Specifies the number of atom names in the array.
display Specifies the connection to the X server.
names Specifies the array of atom names.
names_return
Returns the atom names.
only_if_exists
Specifies a Boolean value that indicates whether the atom must
be created.
DESCRIPTION
The XInternAtom function returns the atom identifier associated with the
specified atom_name string. If only_if_exists is False, the atom is
created if it does not exist. Therefore, XInternAtom can return None.
If the atom name is not in the Host Portable Character Encoding, the re-
sult is implementation-dependent. Uppercase and lowercase matter; the
strings “thing”, “Thing”, and “thinG” all designate different atoms.
The atom will remain defined even after the client's connection closes.
It will become undefined only when the last connection to the X server
closes.
XInternAtom can generate BadAlloc and BadValue errors.
The XInternAtoms function returns the atom identifiers associated with
the specified names. The atoms are stored in the atoms_return array
supplied by the caller. Calling this function is equivalent to calling
XInternAtom for each of the names in turn with the specified value of
only_if_exists, but this function minimizes the number of round-trip
protocol exchanges between the client and the X server.
This function returns a nonzero status if atoms are returned for all of
the names; otherwise, it returns zero.
XInternAtoms can generate BadAlloc and BadValue errors.
The XGetAtomName function returns the name associated with the specified
atom. If the data returned by the server is in the Latin Portable Char-
acter Encoding, then the returned string is in the Host Portable Charac-
ter Encoding. Otherwise, the result is implementation-dependent. To
free the resulting string, call XFree.
XGetAtomName can generate a BadAtom error.
The XGetAtomNames function returns the names associated with the speci-
fied atoms. The names are stored in the names_return array supplied by
the caller. Calling this function is equivalent to calling XGetAtomName
for each of the atoms in turn, but this function minimizes the number of
round-trip protocol exchanges between the client and the X server.
This function returns a nonzero status if names are returned for all of
the atoms; otherwise, it returns zero.
XGetAtomNames can generate a BadAtom error.
DIAGNOSTICS
BadAlloc The server failed to allocate the requested resource or server
memory.
BadAtom A value for an Atom argument does not name a defined Atom.
BadValue Some numeric value falls outside the range of values accepted
by the request. Unless a specific range is specified for an
argument, the full range defined by the argument's type is ac-
cepted. Any argument defined as a set of alternatives can
generate this error.
SEE ALSO
XFree(3), XGetWindowProperty(3)
Xlib - C Language X Interface
X Version 11 libX11 1.8.12 XInternAtom(3)
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