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
34
35
36
37
38
39
40
41
42
43
44
|
/*
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#include <stdio.h>
int main (void)
{
int c, prev_esc = 0;
while (EOF != (c = getchar()))
{
if ((c & 0x80) ||
(!(c & ~0x1f) && ('\r' != c) && ('\n' != c) && ('\t' != c)) ||
(prev_esc && (c >= '0') && (c <= '7')) )
{
printf ("\\%d%d%d", (c >> 6), 7 & (c >> 3), 7 & c);
prev_esc = 1;
}
else
{
putchar (c);
prev_esc = 0;
}
}
return 0;
}
|
