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/**
* \file unctrl.c
*
* \brief GIS Library - Handles control characters.
*
* (C) 2001-2008 by the GRASS Development Team
*
* This program is free software under the GNU General Public License
* (>=v2). Read the file COPYING that comes with GRASS for details.
*
* \author GRASS GIS Development Team
*
* \date 1999-2006
*/
#include <stdio.h>
#include <grass/gis.h>
/**
* \brief Printable version of control character.
*
* This routine returns a pointer to a string which contains an
* English-like representation for the character <b>c</b>. This is useful for
* nonprinting characters, such as control characters. Control characters are
* represented by ctrl-C, e.g., control A is represented by ctrl-A. 0177 is
* represented by DEL/RUB. Normal characters remain unchanged.
*
* \param[in] int c
* \return char * pointer to string containing English-like representation for character <b>c</b>
*/
char *G_unctrl(int c)
{
static char buf[20];
if (c < ' ')
sprintf(buf, "ctrl-%c", c | 0100);
else if (c < 0177)
sprintf(buf, "%c", c);
else if (c == 0177)
sprintf(buf, "DEL/RUB");
else
sprintf(buf, "Mctrl-%c", (c & 77) | 0100);
return buf;
}
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