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Diffstat (limited to 'lib/libcurses/lib_unctrl.c')
| -rw-r--r-- | lib/libcurses/lib_unctrl.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/libcurses/lib_unctrl.c b/lib/libcurses/lib_unctrl.c new file mode 100644 index 00000000000..2511ecfb0e8 --- /dev/null +++ b/lib/libcurses/lib_unctrl.c @@ -0,0 +1,47 @@ + +/*************************************************************************** +* 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; + +} |