| |
| /* |
| FUNCTION |
| <<isspace>>---whitespace character predicate |
| |
| INDEX |
| isspace |
| |
| ANSI_SYNOPSIS |
| #include <ctype.h> |
| int isspace(int <[c]>); |
| |
| TRAD_SYNOPSIS |
| #include <ctype.h> |
| int isspace(<[c]>); |
| |
| DESCRIPTION |
| <<isspace>> is a macro which classifies ASCII integer values by table |
| lookup. It is a predicate returning non-zero for whitespace |
| 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 isspace>>'. |
| |
| RETURNS |
| <<isspace>> returns non-zero if <[c]> is a space, tab, carriage return, new |
| line, vertical tab, or formfeed (<<0x09>>--<<0x0D>>, <<0x20>>). |
| |
| PORTABILITY |
| <<isspace>> is ANSI C. |
| |
| No supporting OS subroutines are required. |
| */ |
| #include <_ansi.h> |
| #include <ctype.h> |
| |
| |
| #undef isspace |
| int |
| _DEFUN(isspace,(c),int c) |
| { |
| return(__ctype_ptr__[c+1] & _S); |
| } |
| |
