/*      $OpenBSD: utf8.c,v 1.2 2016/01/18 19:06:37 schwarze Exp $       */

/*
 * Copyright (c) 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef SMALL
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>

extern int f_nonprint;

int
mbsprint(const char *mbs, int print)
{
        wchar_t   wc;
        int       len;  /* length in bytes of UTF-8 encoded string */
        int       width;  /* display width of a single Unicode char */
        int       total_width;  /* display width of the whole string */

        for (total_width = 0; *mbs != '\0'; mbs += len) {
                if ((len = mbtowc(&wc, mbs, MB_CUR_MAX)) == -1) {
                        (void)mbtowc(NULL, NULL, MB_CUR_MAX);
                        if (print)
                                putchar(f_nonprint ? '?' : *mbs);
                        total_width++;
                        len = 1;
                } else if ((width = wcwidth(wc)) == -1) {
                        if (print) {
                                if (f_nonprint)
                                        putchar('?');
                                else
                                        fwrite(mbs, 1, len, stdout);
                        }
                        total_width++;
                } else {
                        if (print)
                                fwrite(mbs, 1, len, stdout);
                        total_width += width;
                }
        }
        return total_width;
}
#endif