src/pdclib/functions/ctype/iscntrl.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

/* iscntrl( int )

   This file is part of the Public Domain C Library (PDCLib).
   Permission is granted to use, modify, and / or redistribute at will.
*/

#include <ctype.h>

#ifndef REGTEST

#include <locale.h>

int iscntrl( int c )
{
    return ( _PDCLIB_lc_ctype.entry[c].flags & _PDCLIB_CTYPE_CNTRL );
}

#endif

#ifdef TEST

#include "_PDCLIB_test.h"

int main( void )
{
    TESTCASE( iscntrl( '\a' ) );
    TESTCASE( iscntrl( '\b' ) );
    TESTCASE( iscntrl( '\n' ) );
    TESTCASE( ! iscntrl( ' ' ) );
    return TEST_RESULTS;
}

#endif