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/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
#include <unctrl.h>
char *unctrl(register chtype uch)
{
static char buffer[3] = "^x";
if ((uch & 0x60) != 0 && uch != 0x7F) {
/*
* Printable character. Simply return the character as a one-character
* string.
*/
buffer[1] = uch;
return &buffer[1];
}
/*
* It is a control character. DEL is handled specially (^?). All others
* use ^x notation, where x is the character code for the control character
* with 0x40 ORed in. (Control-A becomes ^A etc.).
*/
buffer[1] = (uch == 0x7F ? '?' : (uch | 0x40));
return buffer;
}
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