If the total number of resulting wide-character codes including the terminating
null wide-character code is no more than maxsize, wcsftime()
shall return the number of wide-character codes placed into the array pointed
to by wcs, not including the terminating null wide-character code.
Otherwise, zero is returned and the contents of the array are unspecified.
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html