blob: 4c733b2c46908e61268b1f8832fc610c5d175b40 (
plain)
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
|
#include <limits.h>
#include <stdio.h>
#include "_ctype.h"
/** test whether a character is a control character */
int iscntrl(int c)
{
unsigned int *map = __get_locale()->lc_ctype.ctattr;
ASSERT_REPRESENTABLE(c, 0, UCHAR_MAX, unsigned char, EOF);
return map[c] & CT_CNTRL;
}
/***
tests whether ARGUMENT(c) is a character in the class CHARACTER_CLASS(cntrl)
in the current locale.
***/
/*
RETURN(NONZERO, ARGUMENT(c) is a control character)
RETURN(0, ARGUMENT(c) is not a control character)
LC_CTYPE
STDC(1)
*/
|
