forked from KolibriOS/kolibrios
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
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/*
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FUNCTION
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<<isprint>>, <<isgraph>>---printable character predicates
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INDEX
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isprint
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INDEX
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isgraph
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ANSI_SYNOPSIS
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#include <ctype.h>
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int isprint(int <[c]>);
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int isgraph(int <[c]>);
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TRAD_SYNOPSIS
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#include <ctype.h>
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int isprint(<[c]>);
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int isgraph(<[c]>);
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DESCRIPTION
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<<isprint>> 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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characters, and 0 for other character arguments.
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It is defined only if <[c]> is representable as an unsigned char or if
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<[c]> is EOF.
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You can use a compiled subroutine instead of the macro definition by
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undefining either macro using `<<#undef isprint>>' or `<<#undef isgraph>>'.
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RETURNS
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<<isprint>> returns non-zero if <[c]> is a printing character,
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(<<0x20>>--<<0x7E>>).
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<<isgraph>> behaves identically to <<isprint>>, except that the space
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character (<<0x20>>) is excluded.
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PORTABILITY
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<<isprint>> and <<isgraph>> are 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 isgraph
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int
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_DEFUN(isgraph,(c),int c)
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{
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return(__ctype_ptr__[c+1] & (_P|_U|_L|_N));
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}
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#undef isprint
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int
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_DEFUN(isprint,(c),int c)
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{
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return(__ctype_ptr__[c+1] & (_P|_U|_L|_N|_B));
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}
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