WCSCASECMP(3) Library Functions Manual WCSCASECMP(3)

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(3) and strncasecmp(3) 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.

The wcscasecmp () and wcsncasecmp () functions use the current locale to determine the case of the wide characters.

The wcscasecmp_l () and wcsncasecmp_l () functions use the locale represented by locale to determine the case of the wide characters.

When the LC_CTIME category of the locale being used is from the POSIX locale, these functions shall behave as if the wide-character strings had been converted to lowercase and then a comparison of wide-character codes 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.

The behavior is undefined if the locale argument to wcscasecmp_l () or wcsncasecmp_l () is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle.

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.