GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/rs/utf8.c Lines: 0 23 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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int
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mbsavis(char** outp, const char *mbs)
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{
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	const char *src;  /* Iterate mbs. */
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	char	 *dst;  /* Iterate *outp. */
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	wchar_t	  wc;
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	int	  total_width;  /* Display width of the whole string. */
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	int	  width;  /* Display width of a single Unicode char. */
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	int	  len;  /* Length in bytes of UTF-8 encoded string. */
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	len = strlen(mbs);
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	if ((*outp = malloc(len + 1)) == NULL)
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		err(1, NULL);
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	if (MB_CUR_MAX == 1) {
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		memcpy(*outp, mbs, len + 1);
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		return len;
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	}
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	src = mbs;
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	dst = *outp;
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	total_width = 0;
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	while (*src != '\0') {
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		if ((len = mbtowc(&wc, src, MB_CUR_MAX)) == -1) {
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			total_width++;
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			*dst++ = '?';
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			src++;
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		} else if ((width = wcwidth(wc)) == -1) {
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			total_width++;
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			*dst++ = '?';
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			src += len;
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		} else {
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			total_width += width;
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			while (len-- > 0)
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				*dst++ = *src++;
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		}
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	}
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	*dst = '\0';
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	return total_width;
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}