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