1 | /* Verify that ftell does not go into an infinite loop when a conversion fails |
2 | due to insufficient space in the buffer. |
3 | Copyright (C) 2014-2022 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
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 |
17 | License along with the GNU C Library; if not, see |
18 | <https://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <wchar.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | #include <string.h> |
24 | #include <locale.h> |
25 | #include <errno.h> |
26 | #include <unistd.h> |
27 | |
28 | static int do_test (void); |
29 | #define TEST_FUNCTION do_test () |
30 | #include "../test-skeleton.c" |
31 | |
32 | /* Arbitrary number large enough so that the target buffer during conversion is |
33 | not large enough. */ |
34 | #define STRING_SIZE (1400) |
35 | #define NSTRINGS (2) |
36 | |
37 | static int |
38 | do_test (void) |
39 | { |
40 | FILE *fp = NULL; |
41 | wchar_t *inputs[NSTRINGS] = {NULL}; |
42 | int ret = 1; |
43 | |
44 | if (setlocale (LC_ALL, "en_US.UTF-8" ) == NULL) |
45 | { |
46 | printf (format: "Cannot set en_US.UTF-8 locale.\n" ); |
47 | goto out; |
48 | } |
49 | |
50 | |
51 | /* Generate input from one character, chosen because it has an odd number of |
52 | bytes in UTF-8, making it easier to reproduce the problem: |
53 | |
54 | NAME Hiragana letter GO |
55 | CHAR ご |
56 | UTF-8 E38194 |
57 | UCS 3054 |
58 | MARC-8 692434 */ |
59 | wchar_t seed = L'ご'; |
60 | for (int i = 0; i < NSTRINGS; i++) |
61 | { |
62 | inputs[i] = malloc (STRING_SIZE * sizeof (wchar_t)); |
63 | if (inputs[i] == NULL) |
64 | { |
65 | printf (format: "Failed to allocate memory for inputs: %m\n" ); |
66 | goto out; |
67 | } |
68 | wmemset (inputs[i], seed, STRING_SIZE - 1); |
69 | inputs[i][STRING_SIZE - 1] = L'\0'; |
70 | } |
71 | |
72 | char *filename; |
73 | int fd = create_temp_file (base: "tst-fseek-wide-partial.out" , filename: &filename); |
74 | |
75 | if (fd == -1) |
76 | { |
77 | printf (format: "create_temp_file: %m\n" ); |
78 | goto out; |
79 | } |
80 | |
81 | fp = fdopen (fd, "w+" ); |
82 | if (fp == NULL) |
83 | { |
84 | printf (format: "fopen: %m\n" ); |
85 | close (fd: fd); |
86 | goto out; |
87 | } |
88 | |
89 | for (int i = 0; i < NSTRINGS; i++) |
90 | { |
91 | printf (format: "offset: %ld\n" , ftell (stream: fp)); |
92 | if (fputws (ws: inputs[i], stream: fp) == -1) |
93 | { |
94 | perror ("fputws" ); |
95 | goto out; |
96 | } |
97 | } |
98 | ret = 0; |
99 | |
100 | out: |
101 | if (fp != NULL) |
102 | fclose (fp); |
103 | for (int i = 0; i < NSTRINGS; i++) |
104 | free (ptr: inputs[i]); |
105 | |
106 | return ret; |
107 | } |
108 | |