lib_tracechr.c   [plain text]

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/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 ****************************************************************************/

/*
 *	lib_tracechr.c - Tracing/Debugging routines
 */
#include <curses.priv.h>

#include <ctype.h>

MODULE_ID("$Id: lib_tracechr.c,v 1.10 2003/06/14 11:05:42 tom Exp $")

#ifdef TRACE
NCURSES_EXPORT(char *)
_tracechar(int ch)
{
    static char result[40];
    char *name;

    if (ch > KEY_MIN || ch < 0) {
	name = keyname(ch);
	if (name == 0 || *name == '\0')
	    name = "NULL";
	(void) sprintf(result, "'%.30s' = %#03o", name, ch);
    } else if (!isprint(ch) || ch > 255) {
	/*
	 * workaround for glibc bug:
	 * sprintf changes the result from unctrl() to an empty string if it
	 * does not correspond to a valid multibyte sequence.
	 */
	(void) sprintf(result, "%#03o", ch);
    } else {
	name = unctrl(ch);
	if (name == 0 || *name == 0)
	    name = "null";	/* shouldn't happen */
	(void) sprintf(result, "'%.30s' = %#03o", name, ch);
    }
    return (result);
}
#else
empty_module(_nc_lib_tracechr)
#endif