]>
Commit | Line | Data |
---|---|---|
51cd2fbf UD |
1 | /* Test program for ungetc/ftell interaction bug. */ |
2 | ||
3 | #include <stdio.h> | |
4 | ||
5 | static void do_prepare (void); | |
6 | #define PREPARE(argc, argv) do_prepare () | |
7 | static int do_test (void); | |
8 | #define TEST_FUNCTION do_test () | |
9 | #include "../test-skeleton.c" | |
10 | ||
11 | static const char pattern[] = "12345"; | |
12 | static char *temp_file; | |
13 | ||
14 | static void | |
15 | do_prepare (void) | |
16 | { | |
17 | int fd = create_temp_file ("bug-ungetc.", &temp_file); | |
18 | if (fd == -1) | |
19 | { | |
20 | printf ("cannot create temporary file: %m\n"); | |
21 | exit (1); | |
22 | } | |
23 | write (fd, pattern, sizeof (pattern)); | |
24 | close (fd); | |
25 | } | |
26 | ||
27 | static int | |
28 | do_one_test (int mode) | |
29 | { | |
30 | FILE *f; | |
31 | ||
32 | f = fopen (temp_file, "r"); | |
33 | if (f == NULL) | |
34 | { | |
35 | printf ("could not open temporary file: %m\n"); | |
36 | return 1; | |
37 | } | |
38 | ||
39 | if (mode == 1 && ftell (f) != 0) | |
40 | { | |
41 | printf ("first ftell returned wrong position %ld\n", ftell (f)); | |
42 | return 1; | |
43 | } | |
44 | ||
45 | if (fgetc (f) != '1' || fgetc (f) != '2') | |
46 | { | |
47 | puts ("fgetc failed"); | |
48 | return 1; | |
49 | } | |
50 | ||
51 | if (mode == 2 && ftell (f) != 2) | |
52 | { | |
53 | printf ("second ftell returned wrong position %ld\n", ftell (f)); | |
54 | return 1; | |
55 | } | |
56 | ||
57 | if (ungetc ('6', f) != '6') | |
58 | { | |
59 | puts ("ungetc failed"); | |
60 | return 1; | |
61 | } | |
62 | ||
63 | if (ftell (f) != 1) | |
64 | { | |
65 | printf ("third ftell returned wrong position %ld\n", ftell (f)); | |
66 | return 1; | |
67 | } | |
68 | ||
69 | if (fgetc (f) != '6') | |
70 | { | |
71 | puts ("fgetc failed"); | |
72 | return 1; | |
73 | } | |
74 | ||
75 | if (ftell (f) != 2) | |
76 | { | |
77 | printf ("fourth ftell returned wrong position %ld\n", ftell (f)); | |
78 | return 1; | |
79 | } | |
80 | ||
81 | fclose (f); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | static int | |
87 | do_test (void) | |
88 | { | |
89 | int mode; | |
90 | for (mode = 0; mode <= 2; mode++) | |
91 | if (do_one_test (mode)) | |
92 | return 1; | |
93 | return 0; | |
94 | } |