The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2003 Edition
Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.

NAME

wcscoll - wide-character string comparison using collating information

SYNOPSIS

#include <wchar.h>

int wcscoll(const wchar_t *
ws1, const wchar_t *ws2);

DESCRIPTION

[CX] [Option Start] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard. [Option End]

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.

[CX] [Option Start] 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. [Option End]

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. [CX] [Option Start]  On error, wcscoll() shall set errno, but no return value is reserved to indicate an error. [Option End]

ERRORS

The wcscoll() function may fail if:

[EINVAL]
[CX] [Option Start] The ws1 or ws2 arguments contain wide-character codes outside the domain of the collating sequence. [Option End]

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>

CHANGE HISTORY

First released in Issue 4. Derived from the MSE working draft.

Issue 5

Moved from ENHANCED I18N to BASE and the [ENOSYS] error is removed.

The DESCRIPTION is updated to indicate that errno is not changed if the function is successful.

End of informative text.


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