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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); |