wcsnlen - determine the length of a fixed-size wide-character string
The wcsnlen() function is the wide-character equivalent of the strnlen(3) function. It returns the number of wide-characters in the string pointed to by
s, not including the terminating null wide character (L'\0'), but at most
maxlen wide characters (note: this parameter is not a byte count). In doing this, wcsnlen() looks at only the first
maxlen wide characters at
s and never beyond
The wcsnlen() function returns
wcslen(s), if that is less than
maxlen if there is no null wide character among the first
maxlen wide characters pointed to by
The wcsnlen() function is provided in glibc since version 2.1.
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