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