GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/stdio/vswprintf.c Lines: 0 38 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: vswprintf.c,v 1.6 2015/08/31 02:53:57 guenther Exp $	*/
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/*	$NetBSD: vswprintf.c,v 1.1 2005/05/14 23:51:02 christos Exp $	*/
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/*
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 * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
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 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <errno.h>
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#include <stdio.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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#include <stdarg.h>
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#include "local.h"
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int
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vswprintf(wchar_t * __restrict s, size_t n, const wchar_t * __restrict fmt,
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    __va_list ap)
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{
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	mbstate_t mbs;
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	FILE f;
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	char *mbp;
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	int ret, sverrno;
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	size_t nwc;
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	struct __sfileext fext;
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	if (n == 0) {
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		errno = EINVAL;
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		return (-1);
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	}
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	_FILEEXT_SETUP(&f, &fext);
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	f._file = -1;
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	f._flags = __SWR | __SSTR | __SALC;
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	f._bf._base = f._p = malloc(128);
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	if (f._bf._base == NULL) {
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		errno = ENOMEM;
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		return (-1);
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	}
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	f._bf._size = f._w = 127;		/* Leave room for the NUL */
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	ret = __vfwprintf(&f, fmt, ap);
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	if (ret < 0) {
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		sverrno = errno;
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		free(f._bf._base);
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		errno = sverrno;
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		return (-1);
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	}
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	if (ret == 0) {
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		s[0] = L'\0';
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		free(f._bf._base);
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		return (0);
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	}
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	*f._p = '\0';
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	mbp = (char *)f._bf._base;
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	/*
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	 * XXX Undo the conversion from wide characters to multibyte that
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	 * fputwc() did in __vfwprintf().
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	 */
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	bzero(&mbs, sizeof(mbs));
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	nwc = mbsrtowcs(s, (const char **)&mbp, n, &mbs);
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	free(f._bf._base);
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	if (nwc == (size_t)-1) {
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		errno = EILSEQ;
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		return (-1);
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	}
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	if (nwc == n) {
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		s[n - 1] = L'\0';
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		errno = EOVERFLOW;
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		return (-1);
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	}
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	return (ret);
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}
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DEF_STRONG(vswprintf);