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e9a37a83 | 1 | /* Test program for ungetc/fseekpos interaction. |
d4697bc9 | 2 | Copyright (C) 2004-2014 Free Software Foundation, Inc. |
e9a37a83 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
e9a37a83 UD |
19 | |
20 | #include <stdio.h> | |
21 | ||
22 | static void do_prepare (void); | |
23 | #define PREPARE(argc, argv) do_prepare () | |
24 | static int do_test (void); | |
25 | #define TEST_FUNCTION do_test () | |
26 | #include "../test-skeleton.c" | |
27 | ||
28 | static const char pattern[] = "abcdefghijklmnopqrstuvwxyz"; | |
29 | static char *temp_file; | |
30 | ||
31 | static void | |
32 | do_prepare (void) | |
33 | { | |
34 | int fd = create_temp_file ("bug-ungetc.", &temp_file); | |
35 | if (fd == -1) | |
36 | { | |
37 | printf ("cannot create temporary file: %m\n"); | |
38 | exit (1); | |
39 | } | |
40 | write (fd, pattern, sizeof (pattern) - 1); | |
41 | close (fd); | |
42 | } | |
43 | ||
44 | #define TEST_POS 5 | |
45 | ||
46 | static int | |
47 | do_one_test (int mode) | |
48 | { | |
49 | FILE *f = fopen (temp_file, "r"); | |
50 | if (f == NULL) | |
51 | { | |
52 | printf ("%d: could not open temporary file: %m\n", mode); | |
53 | return 1; | |
54 | } | |
55 | ||
56 | int i; | |
57 | for (i = 0; i < TEST_POS; ++i) | |
58 | getc (f); | |
59 | ||
60 | fpos_t p; | |
61 | if (fgetpos (f, &p) != 0) | |
62 | { | |
63 | printf ("%d: fgetpos failed: %m\n", mode); | |
64 | return 1; | |
65 | } | |
66 | ||
67 | if (mode) | |
68 | { | |
69 | if (fseek (f, 0, SEEK_SET) != 0) | |
70 | { | |
71 | printf ("%d: fseek failed: %m\n", mode); | |
72 | return 1; | |
73 | } | |
74 | ||
75 | for (i = 0; i < TEST_POS - (mode >= 2); ++i) | |
76 | getc (f); | |
77 | } | |
78 | ||
79 | if (mode != 2 && ungetc ('X', f) != 'X') | |
80 | { | |
81 | printf ("%d: ungetc failed\n", mode); | |
82 | return 1; | |
83 | } | |
84 | ||
85 | if (mode == 3 && getc (f) != 'X') | |
86 | { | |
87 | printf ("%d: getc after ungetc did not return X\n", mode); | |
88 | return 1; | |
89 | } | |
90 | ||
91 | if (fsetpos (f, &p) != 0) | |
92 | { | |
93 | printf ("%d: fsetpos failed: %m\n", mode); | |
94 | return 1; | |
95 | } | |
96 | ||
97 | if (getc (f) != pattern[TEST_POS]) | |
98 | { | |
99 | printf ("%d: getc did not return %c\n", mode, pattern[TEST_POS]); | |
100 | return 1; | |
101 | } | |
102 | ||
103 | fclose (f); | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static int | |
109 | do_test (void) | |
110 | { | |
111 | int mode, ret = 0; | |
112 | for (mode = 0; mode <= 4; mode++) | |
113 | ret |= do_one_test (mode); | |
114 | return ret; | |
115 | } |