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Diffstat (limited to 'gl/freading.h')
-rw-r--r-- | gl/freading.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/gl/freading.h b/gl/freading.h new file mode 100644 index 00000000..27b3abbc --- /dev/null +++ b/gl/freading.h | |||
@@ -0,0 +1,54 @@ | |||
1 | /* Retrieve information about a FILE stream. | ||
2 | Copyright (C) 2007-2023 Free Software Foundation, Inc. | ||
3 | |||
4 | This file is free software: you can redistribute it and/or modify | ||
5 | it under the terms of the GNU Lesser General Public License as | ||
6 | published by the Free Software Foundation; either version 2.1 of the | ||
7 | License, or (at your option) any later version. | ||
8 | |||
9 | This file 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 Lesser General Public License for more details. | ||
13 | |||
14 | You should have received a copy of the GNU Lesser General Public License | ||
15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ | ||
16 | |||
17 | #include <stdio.h> | ||
18 | |||
19 | /* Return true if the stream STREAM is opened read-only, or if the | ||
20 | last operation on the stream was a read operation. Return false if | ||
21 | the stream is opened write-only or append-only, or if it supports | ||
22 | writing and there is no current read operation (such as fgetc). | ||
23 | |||
24 | freading and fwriting will never both be true. If STREAM supports | ||
25 | both reads and writes, then: | ||
26 | - both freading and fwriting might be false when the stream is first | ||
27 | opened, after read encounters EOF, or after fflush, | ||
28 | - freading might be false or true and fwriting might be false | ||
29 | after repositioning (such as fseek, fsetpos, or rewind), | ||
30 | depending on the underlying implementation. | ||
31 | |||
32 | STREAM must not be wide-character oriented. */ | ||
33 | |||
34 | #if HAVE___FREADING && (!defined __GLIBC__ || defined __UCLIBC__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) | ||
35 | /* Solaris >= 7, UnixWare >= 7.1.4.MP4, Cygwin >= 1.7.34, Android API >= 29, not glibc >= 2.2, but glibc >= 2.7, or musl libc */ | ||
36 | |||
37 | # if HAVE_STDIO_EXT_H | ||
38 | # include <stdio_ext.h> | ||
39 | # endif | ||
40 | # define freading(stream) (__freading (stream) != 0) | ||
41 | |||
42 | #else | ||
43 | |||
44 | # ifdef __cplusplus | ||
45 | extern "C" { | ||
46 | # endif | ||
47 | |||
48 | extern bool freading (FILE *stream) _GL_ATTRIBUTE_PURE; | ||
49 | |||
50 | # ifdef __cplusplus | ||
51 | } | ||
52 | # endif | ||
53 | |||
54 | #endif | ||