#include <linkage.h>
_IDECL int isalnum(int _c);
_IDECL int isalpha(int _c);
_IDECL int iscntrl(int _c);
_IDECL int isdigit(int _c);
_IDECL int isgraph(int _c);
_IDECL int islower(int _c);
_IDECL int isprint(int _c);
_IDECL int ispunct(int _c);
_IDECL int isspace(int _c);
_IDECL int isupper(int _c);
_IDECL int isxdigit(int _c);
_IDECL int isascii(int _c);
_IDECL int toascii(int _c);