URL
https://opencores.org/ocsvn/scarts/scarts/trunk
Subversion Repositories scarts
[/] [scarts/] [trunk/] [toolchain/] [scarts-newlib/] [newlib-1.17.0/] [newlib/] [libc/] [ctype/] [iscntrl.c] - Rev 9
Compare with Previous | Blame | View Log
/* FUNCTION <<iscntrl>>---control character predicate INDEX iscntrl ANSI_SYNOPSIS #include <ctype.h> int iscntrl(int <[c]>); TRAD_SYNOPSIS #include <ctype.h> int iscntrl(<[c]>); DESCRIPTION <<iscntrl>> is a macro which classifies ASCII integer values by table lookup. It is a predicate returning non-zero for control characters, and 0 for other characters. It is defined only when <<isascii>>(<[c]>) is true or <[c]> is EOF. You can use a compiled subroutine instead of the macro definition by undefining the macro using `<<#undef iscntrl>>'. RETURNS <<iscntrl>> returns non-zero if <[c]> is a delete character or ordinary control character (<<0x7F>> or <<0x00>>--<<0x1F>>). PORTABILITY <<iscntrl>> is ANSI C. No supporting OS subroutines are required. */ #include <_ansi.h> #include <ctype.h> #undef iscntrl int _DEFUN(iscntrl,(c),int c) { return(__ctype_ptr__[c+1] & _C); }