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WCSCOLL
Section: POSIX Programmer's Manual (3P)
Updated: 2003
Index
Return to Main Contents
PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
NAME
wcscoll - wide-character string comparison using collating information
SYNOPSIS
#include <wchar.h>
int wcscoll(const wchar_t * ws1, const wchar_t *ws2);
DESCRIPTION
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.
RETURN VALUE
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.
ERRORS
The wcscoll() function may fail if:
- EINVAL
-
The ws1 or ws2 arguments contain wide-character codes
outside the domain of the collating sequence.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
The wcsxfrm() and wcscmp()
functions should be used for sorting large lists.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
wcscmp(), wcsxfrm(), the Base Definitions volume of
IEEE Std 1003.1-2001, <wchar.h>
COPYRIGHT
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 .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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