2 * C99-compatible snprintf() and vsnprintf() implementations
3 * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "compat/va_copy.h"
28 #include "libavutil/error.h"
30 int avpriv_snprintf(char *s, size_t n, const char *fmt, ...)
36 ret = avpriv_vsnprintf(s, n, fmt, ap);
42 int avpriv_vsnprintf(char *s, size_t n, const char *fmt,
49 return _vscprintf(fmt, ap);
51 return AVERROR(EOVERFLOW);
53 /* we use n - 1 here because if the buffer is not big enough, the MS
54 * runtime libraries don't add a terminating zero at the end. MSDN
55 * recommends to provide _snprintf/_vsnprintf() a buffer size that
56 * is one less than the actual buffer, and zero it before calling
57 * _snprintf/_vsnprintf() to workaround this problem.
58 * See http://msdn.microsoft.com/en-us/library/1kt27hek(v=vs.80).aspx */
61 ret = _vsnprintf(s, n - 1, fmt, ap_copy);
64 ret = _vscprintf(fmt, ap);