client/display.c

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2012  Intel Corporation. All rights reserved.
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <ctype.h>
#include <readline/readline.h>

#include "display.h"

void rl_printf(const char *fmt, ...)
{
	va_list args;
	bool save_input;
	char *saved_line;
	int saved_point;

	save_input = !RL_ISSTATE(RL_STATE_DONE);

	if (save_input) {
		saved_point = rl_point;
		saved_line = rl_copy_text(0, rl_end);
		rl_save_prompt();
		rl_replace_line("", 0);
		rl_redisplay();
	}

	va_start(args, fmt);
	vprintf(fmt, args);
	va_end(args);

	if (save_input) {
		rl_restore_prompt();
		rl_replace_line(saved_line, 0);
		rl_point = saved_point;
		rl_forced_update_display();
		free(saved_line);
	}
}

void rl_hexdump(const unsigned char *buf, size_t len)
{
	static const char hexdigits[] = "0123456789abcdef";
	char str[68];
	size_t i;

	if (!len)
		return;

	str[0] = ' ';

	for (i = 0; i < len; i++) {
		str[((i % 16) * 3) + 1] = ' ';
		str[((i % 16) * 3) + 2] = hexdigits[buf[i] >> 4];
		str[((i % 16) * 3) + 3] = hexdigits[buf[i] & 0xf];
		str[(i % 16) + 51] = isprint(buf[i]) ? buf[i] : '.';

		if ((i + 1) % 16 == 0) {
			str[49] = ' ';
			str[50] = ' ';
			str[67] = '\0';
			rl_printf("%s\n", str);
			str[0] = ' ';
		}
	}

	if (i % 16 > 0) {
		size_t j;
		for (j = (i % 16); j < 16; j++) {
			str[(j * 3) + 1] = ' ';
			str[(j * 3) + 2] = ' ';
			str[(j * 3) + 3] = ' ';
			str[j + 51] = ' ';
		}
		str[49] = ' ';
		str[50] = ' ';
		str[67] = '\0';
		rl_printf("%s\n", str);
	}
}