forked from KolibriOS/kolibrios
7315bb05c0
git-svn-id: svn://kolibrios.org@4921 a494cfbc-eb01-0410-851d-a64ba20cac60
43 lines
788 B
C
43 lines
788 B
C
|
|
/*
|
|
FUNCTION
|
|
<<isblank>>---blank character predicate
|
|
|
|
INDEX
|
|
isblank
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <ctype.h>
|
|
int isblank(int <[c]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <ctype.h>
|
|
int isblank(<[c]>);
|
|
|
|
DESCRIPTION
|
|
<<isblank>> is a function which classifies ASCII integer values by table
|
|
lookup. It is a predicate returning non-zero for blank characters, and 0
|
|
for other characters. It is defined only if <[c]> is representable as an
|
|
unsigned char or if <[c]> is EOF.
|
|
|
|
RETURNS
|
|
<<isblank>> returns non-zero if <[c]> is a blank character.
|
|
|
|
PORTABILITY
|
|
<<isblank>> is C99.
|
|
|
|
No supporting OS subroutines are required.
|
|
*/
|
|
|
|
#include <_ansi.h>
|
|
#include <ctype.h>
|
|
|
|
|
|
|
|
#undef isblank
|
|
int
|
|
_DEFUN(isblank,(c),int c)
|
|
{
|
|
return ((__ctype_ptr__[c+1] & _B) || (c == '\t'));
|
|
}
|