| |
| /* |
| FUNCTION |
| <<ispunct>>---punctuation character predicate |
| |
| INDEX |
| ispunct |
| |
| ANSI_SYNOPSIS |
| #include <ctype.h> |
| int ispunct(int <[c]>); |
| |
| TRAD_SYNOPSIS |
| #include <ctype.h> |
| int ispunct(<[c]>); |
| |
| DESCRIPTION |
| <<ispunct>> is a macro which classifies ASCII integer values by table |
| lookup. It is a predicate returning non-zero for printable |
| punctuation characters, and 0 for other characters. It is defined only |
| if <[c]> is representable as an unsigned char or if <[c]> is EOF. |
| |
| You can use a compiled subroutine instead of the macro definition by |
| undefining the macro using `<<#undef ispunct>>'. |
| |
| RETURNS |
| <<ispunct>> returns non-zero if <[c]> is a printable punctuation character |
| (<<isgraph(<[c]>) && !isalnum(<[c]>)>>). |
| |
| PORTABILITY |
| <<ispunct>> is ANSI C. |
| |
| No supporting OS subroutines are required. |
| */ |
| |
| #include <_ansi.h> |
| #include <ctype.h> |
| |
| |
| #undef ispunct |
| int |
| _DEFUN(ispunct,(c),int c) |
| { |
| return(__ctype_ptr__[c+1] & _P); |
| } |
| |
