1/*	$OpenBSD: utf8.c,v 1.2 2016/01/18 19:06:37 schwarze Exp $	*/
2
3/*
4 * Copyright (c) 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#ifndef SMALL
20#include <stdio.h>
21#include <stdlib.h>
22#include <wchar.h>
23
24extern int f_nonprint;
25
26int
27mbsprint(const char *mbs, int print)
28{
29	wchar_t	  wc;
30	int	  len;  /* length in bytes of UTF-8 encoded string */
31	int	  width;  /* display width of a single Unicode char */
32	int	  total_width;  /* display width of the whole string */
33
34	for (total_width = 0; *mbs != '\0'; mbs += len) {
35		if ((len = mbtowc(&wc, mbs, MB_CUR_MAX)) == -1) {
36			(void)mbtowc(NULL, NULL, MB_CUR_MAX);
37			if (print)
38				putchar(f_nonprint ? '?' : *mbs);
39			total_width++;
40			len = 1;
41		} else if ((width = wcwidth(wc)) == -1) {
42			if (print) {
43				if (f_nonprint)
44					putchar('?');
45				else
46					fwrite(mbs, 1, len, stdout);
47			}
48			total_width++;
49		} else {
50			if (print)
51				fwrite(mbs, 1, len, stdout);
52			total_width += width;
53		}
54	}
55	return total_width;
56}
57#endif
58