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The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008
Copyright © 2001-2008 The IEEE and The Open Group

#### 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.

The following sections are informative.

#### 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.

End of informative text.

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Copyright © 2001-2008 The IEEE and The Open Group, All Rights Reserved
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