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
24 extern int f_nonprint;
25
26 int
mbsprint(const char * mbs,int print)27 mbsprint(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