WMEMCMP(P) POSIX Programmer's Manual WMEMCMP(P)
wmemcmp - compare wide characters in memory
int wmemcmp(const wchar_t *ws1, const wchar_t *ws2, size_t n);
The wmemcmp() function shall compare the first n wide characters of the object pointed to
by ws1 to the first n wide characters of the object pointed to by ws2. This function
shall not be affected by locale and all wchar_t values shall be treated identically. The
null wide character and wchar_t values not corresponding to valid characters shall not be
If n is zero, the application shall ensure that ws1 and ws2 are valid pointers, and the
function shall behave as if the two objects compare equal.
The wmemcmp() function shall return an integer greater than, equal to, or less than zero,
respectively, as the object pointed to by ws1 is greater than, equal to, or less than the
object pointed to by ws2.
No errors are defined.
The following sections are informative.
wmemchr() , wmemcpy() , wmemmove() , wmemset() , the Base Definitions volume of
IEEE Std 1003.1-2001, <wchar.h>
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 WMEMCMP(P)