NAME

wcscasecmp, wcscasecmp_l, wcsncasecmp, wcsncasecmp_l - case-insensitive wide-character string comparison

SYNOPSIS

[CX] #include <wchar.h>

int wcscasecmp(const wchar_t *ws1, const wchar_t *ws2);
int wcscasecmp_l(const wchar_t *ws1, const wchar_t *ws2,
       locale_t locale);
int wcsncasecmp(const wchar_t *ws1, const wchar_t *ws2, size_t n);
int wcsncasecmp_l(const wchar_t *ws1, const wchar_t *ws2,
       size_t n, locale_t locale);

DESCRIPTION

The wcscasecmp() and wcsncasecmp() functions are the wide-character equivalent of the strcasecmp() and strncasecmp() functions, respectively.

The wcscasecmp() and wcscasecmp_l() functions shall compare, while ignoring differences in case, the wide-character string pointed to by ws1 to the wide-character string pointed to by ws2.

The wcsncasecmp() and wcsncasecmp_l() functions shall compare, while ignoring differences in case, not more than n wide-characters from the wide-character string pointed to by ws1 to the wide-character string pointed to by ws2.

When the LC_CTIME category of the current locale is from the POSIX locale, these functions shall behave as if the strings had been converted to lowercase and then a byte comparison performed. Otherwise, the results are unspecified.

The information for wcscasecmp_l() and wcsncasecmp_l() about the case of the characters comes from the locale represented by locale.

RETURN VALUE

Upon completion, the wcscasecmp() and wcscasecmp_l() functions shall return an integer greater than, equal to, or less than 0 if the wide-character string pointed to by ws1 is, ignoring case, greater than, equal to, or less than the wide-character string pointed to by ws2, respectively.

Upon completion, the wcsncasecmp() and wcsncasecmp_l() functions shall return an integer greater than, equal to, or less than 0 if the possibly null wide-character terminated string pointed to by ws1 is, ignoring case, greater than, equal to, or less than the possibly null wide-character terminated string pointed to by ws2, respectively.

No return values are reserved to indicate an error.

ERRORS

The wcscasecmp_l() and wcsncasecmp_l() functions may fail if:

[EINVAL]

locale is not a valid locale object handle.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

strcasecmp , wcscmp , wcsncmp

XBD <wchar.h>

CHANGE HISTORY

First released in Issue 7.