| /* Retrieve information about a FILE stream. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| #include <stddef.h> |
| #include <stdio.h> |
| |
| /* Assuming the stream STREAM is open for reading: |
| Return the number of bytes waiting in the input buffer of STREAM. |
| This includes both the bytes that have been read from the underlying input |
| source and the bytes that have been pushed back through 'ungetc'. |
| |
| If this number is 0 and the stream is not currently writing, |
| fflush (STREAM) is known to be a no-op. |
| |
| STREAM must not be wide-character oriented. */ |
| |
| #if HAVE___FREADAHEAD /* musl libc */ |
| |
| # include <stdio_ext.h> |
| # define freadahead(stream) __freadahead (stream) |
| |
| #else |
| |
| # ifdef __cplusplus |
| extern "C" { |
| # endif |
| |
| extern size_t freadahead (FILE *stream) _GL_ATTRIBUTE_PURE; |
| |
| # ifdef __cplusplus |
| } |
| # endif |
| |
| #endif |