isextlower Function (Macro)

ctype.h

short isextlower (short c);

Checks whether a character is a lowercase, including foreign ones.

isextlower returns nonzero if c is a lowercase letter, either ordinary ('a' to 'z') or foreign one (see isfrgnlower), otherwise it returns zero. It is an inline function which is implemented using GNU C smart macros, which expands to a medium-sized code.