| 0,0 → 1,71 |
|---|
| /* |
| * C99-compatible snprintf() and vsnprintf() implementations |
| * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdio.h> |
| #include <stdarg.h> |
| #include <limits.h> |
| #include <string.h> |
| |
| #include "compat/va_copy.h" |
| #include "libavutil/error.h" |
| |
| #if defined(__MINGW32__) |
| #define EOVERFLOW EFBIG |
| #endif |
| |
| int avpriv_snprintf(char *s, size_t n, const char *fmt, ...) |
| { |
| va_list ap; |
| int ret; |
| |
| va_start(ap, fmt); |
| ret = avpriv_vsnprintf(s, n, fmt, ap); |
| va_end(ap); |
| |
| return ret; |
| } |
| |
| int avpriv_vsnprintf(char *s, size_t n, const char *fmt, |
| va_list ap) |
| { |
| int ret; |
| va_list ap_copy; |
| |
| if (n == 0) |
| return _vscprintf(fmt, ap); |
| else if (n > INT_MAX) |
| return AVERROR(EOVERFLOW); |
| |
| /* we use n - 1 here because if the buffer is not big enough, the MS |
| * runtime libraries don't add a terminating zero at the end. MSDN |
| * recommends to provide _snprintf/_vsnprintf() a buffer size that |
| * is one less than the actual buffer, and zero it before calling |
| * _snprintf/_vsnprintf() to workaround this problem. |
| * See http://msdn.microsoft.com/en-us/library/1kt27hek(v=vs.80).aspx */ |
| memset(s, 0, n); |
| va_copy(ap_copy, ap); |
| ret = _vsnprintf(s, n - 1, fmt, ap_copy); |
| va_end(ap_copy); |
| if (ret == -1) |
| ret = _vscprintf(fmt, ap); |
| |
| return ret; |
| } |