Determines whether a character is an ASCII lower case letter.
Unlike the standard C library islower() function, this only
recognizes standard ASCII letters and ignores the locale,
returning FALSE for all non-ASCII characters. Also, unlike
the standard library function, this takes a char,
not an int, so don't call it on EOF, but no need
to worry about casting to guchar before passing a possibly
non-ASCII character in.
Determines whether a character is an ASCII lower case letter. Unlike the standard C library islower() function, this only recognizes standard ASCII letters and ignores the locale, returning FALSE for all non-ASCII characters. Also, unlike the standard library function, this takes a char, not an int, so don't call it on EOF, but no need to worry about casting to guchar before passing a possibly non-ASCII character in.