WCSCOLL(P) POSIX Programmer's Manual WCSCOLL(P)
wcscoll - wide-character string comparison using collating information
int wcscoll(const wchar_t *ws1, const wchar_t *ws2);
The wcscoll() function shall compare the wide-character string pointed to by ws1 to the
wide-character string pointed to by ws2, both interpreted as appropriate to the LC_COLLATE
category of the current locale.
The wcscoll() function shall not change the setting of errno if successful.
An application wishing to check for error situations should set errno to 0 before calling
wcscoll(). If errno is non-zero on return, an error has occurred.
Upon successful completion, wcscoll() shall return an integer greater than, equal to, or
less than 0, according to whether the wide-character string pointed to by ws1 is greater
than, equal to, or less than the wide-character string pointed to by ws2, when both are
interpreted as appropriate to the current locale. On error, wcscoll() shall set errno,
but no return value is reserved to indicate an error.
The wcscoll() function may fail if:
EINVAL The ws1 or ws2 arguments contain wide-character codes outside the domain of the
The following sections are informative.
The wcsxfrm() and wcscmp() functions should be used for sorting large lists.
wcscmp() , wcsxfrm() , 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 WCSCOLL(P)