0,0 → 1,46 |
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/* |
FUNCTION |
<<ispunct>>---punctuation character predicate |
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INDEX |
ispunct |
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ANSI_SYNOPSIS |
#include <ctype.h> |
int ispunct(int <[c]>); |
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TRAD_SYNOPSIS |
#include <ctype.h> |
int ispunct(<[c]>); |
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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 when <<isascii>>(<[c]>) is true or <[c]> is EOF. |
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You can use a compiled subroutine instead of the macro definition by |
undefining the macro using `<<#undef ispunct>>'. |
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RETURNS |
<<ispunct>> returns non-zero if <[c]> is a printable punctuation character |
(<<isgraph(<[c]>) && !isalnum(<[c]>)>>). |
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PORTABILITY |
<<ispunct>> is ANSI C. |
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No supporting OS subroutines are required. |
*/ |
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#include <_ansi.h> |
#include <ctype.h> |
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#undef ispunct |
int |
_DEFUN(ispunct,(c),int c) |
{ |
return(__ctype_ptr__[c+1] & _P); |
} |
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