lib_tracechr.c

ncurses 库 可能有用酒用 没用就算了 我觉得还可以用

/****************************************************************************
 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc.              *
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/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <[e-mail]> 1992,1995               *
 *     and: Eric S. Raymond <[e-mail]>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

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

#include <ctype.h>

MODULE_ID("$Id: lib_tracechr.c,v 1.12 2005/04/16 16:55:46 tom Exp $")

#ifdef TRACE
NCURSES_EXPORT(char *)
_tracechar(int ch)
{
    static char result[40];
    NCURSES_CONST 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 (!is8bits(ch) || !isprint(UChar(ch))) {
	/*
	 * 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((chtype) 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