2004-11-03 13:51:07 +00:00
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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2007-06-20 22:33:04 +00:00
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.TH "WCSCOLL" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.\" wcscoll
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2007-09-20 06:03:25 +00:00
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.SH PROLOG
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This manual page is part of the POSIX Programmer's Manual.
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The Linux implementation of this interface may differ (consult
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the corresponding Linux manual page for details of Linux behavior),
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or the interface may not be implemented on Linux.
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2004-11-03 13:51:07 +00:00
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.SH NAME
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wcscoll \- wide-character string comparison using collating information
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.SH SYNOPSIS
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.LP
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\fB#include <wchar.h>
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.br
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.sp
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int wcscoll(const wchar_t *\fP\fIws1\fP\fB, const wchar_t *\fP\fIws2\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIwcscoll\fP() function shall compare the wide-character string
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pointed to by \fIws1\fP to the wide-character string
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pointed to by \fIws2\fP, both interpreted as appropriate to the \fILC_COLLATE\fP
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category of the current locale.
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.LP
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The
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\fIwcscoll\fP() function shall not change the setting of \fIerrno\fP
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if successful.
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.LP
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An application wishing to check for error situations should set \fIerrno\fP
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to 0 before calling \fIwcscoll\fP(). If
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\fIerrno\fP is non-zero on return, an error has occurred.
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.SH RETURN VALUE
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.LP
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Upon successful completion, \fIwcscoll\fP() shall return an integer
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greater than, equal to, or less than 0, according to
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whether the wide-character string pointed to by \fIws1\fP is greater
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than, equal to, or less than the wide-character string
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pointed to by \fIws2\fP, when both are interpreted as appropriate
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2007-11-18 06:52:48 +00:00
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to the current locale. On error,
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2004-11-03 13:51:07 +00:00
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\fIwcscoll\fP() shall set \fIerrno\fP, but no return value is reserved
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to indicate an error.
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.SH ERRORS
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.LP
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The \fIwcscoll\fP() function may fail if:
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.TP 7
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.B EINVAL
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The \fIws1\fP or \fIws2\fP arguments contain wide-character codes
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outside the domain of the collating sequence.
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.sp
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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The \fIwcsxfrm\fP() and \fIwcscmp\fP()
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functions should be used for sorting large lists.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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2007-09-20 06:11:55 +00:00
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\fIwcscmp\fP(), \fIwcsxfrm\fP(), the Base Definitions volume of
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2004-11-03 13:51:07 +00:00
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IEEE\ Std\ 1003.1-2001, \fI<wchar.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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