The wcsncmp() function shall compare not more than n
wide-character codes (wide-character codes that follow a null wide-character
code are not compared) from the array pointed to by ws1 to the array
pointed to by ws2.
The sign of a non-zero return value shall be determined by the sign of the
difference between the values of the first pair of wide-character codes that
differ in the objects being compared.
Upon successful completion, wcsncmp() shall return an integer greater
than, equal to, or less than 0, if the possibly null-terminated array pointed
to by ws1 is greater than, equal to, or less than the possibly
null-terminated array pointed to by ws2, respectively.
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