1 /* Retrieve information about a FILE stream.
2 Copyright (C) 2007-2008 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 /* Assuming the stream STREAM is open for reading:
25 Return a pointer to the input buffer of STREAM.
26 If freadahead (STREAM) > 0, the result is either a pointer to
27 freadahead (STREAM) bytes, or NULL. The latter case can happen after
28 use of 'ungetc (..., STREAM)'.
29 If freadahead (STREAM) == 0, the result is not usable; it may be NULL.
30 In this case, you should use getc (STREAM), fgetc (STREAM), or
31 fread (..., STREAM) to access the input from STREAM.
33 The resulting pointer becomes invalid upon any operation on STREAM.
35 STREAM must not be wide-character oriented. */
37 extern const char * freadptr (FILE *stream);