1 | /* fmemopen tests for BZ#1930 and BZ#20005. |
2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <assert.h> |
20 | #include <stdio.h> |
21 | #include <string.h> |
22 | #include <sys/types.h> |
23 | |
24 | |
25 | /* Check if fflush does not reset the file position. */ |
26 | static int |
27 | do_test (void) |
28 | { |
29 | char buffer[500] = "x" ; |
30 | |
31 | FILE *stream = fmemopen (buffer, sizeof (buffer), "r+" ); |
32 | if (stream == NULL) |
33 | { |
34 | printf (format: "error: fmemopen could not open stream\n" ); |
35 | return 1; |
36 | } |
37 | |
38 | const char test[] = "test" ; |
39 | |
40 | size_t r = fwrite (test, sizeof (char), sizeof (test), stream); |
41 | if (r != sizeof (test)) |
42 | { |
43 | printf (format: "error: fwrite returned %zu, expected %zu\n" , r, sizeof (test)); |
44 | return 1; |
45 | } |
46 | |
47 | r = ftell (stream: stream); |
48 | if (r != sizeof (test)) |
49 | { |
50 | printf (format: "error: ftell return %zu, expected %zu\n" , r, sizeof (test)); |
51 | return 1; |
52 | } |
53 | |
54 | if (fflush (stream) != 0) |
55 | { |
56 | printf (format: "error: fflush failed\n" ); |
57 | return 1; |
58 | } |
59 | |
60 | r = ftell (stream: stream); |
61 | if (r != sizeof (test)) |
62 | { |
63 | printf (format: "error: ftell return %zu, expected %zu\n" , r, sizeof (test)); |
64 | return 1; |
65 | } |
66 | |
67 | return 0; |
68 | } |
69 | |
70 | #define TEST_FUNCTION do_test () |
71 | #include "../test-skeleton.c" |
72 | |