1 | /* Copyright (C) 1993-2017 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library 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 GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. |
17 | |
18 | As a special exception, if you link the code in this file with |
19 | files compiled with a GNU compiler to produce an executable, |
20 | that does not cause the resulting executable to be covered by |
21 | the GNU Lesser General Public License. This exception does not |
22 | however invalidate any other reasons why the executable file |
23 | might be covered by the GNU Lesser General Public License. |
24 | This exception applies to code released by its copyright holders |
25 | in files containing the exception. */ |
26 | |
27 | /* We need to avoid the header declarations of these, because |
28 | the types don't match _IO_fgetpos and then the compiler will |
29 | complain about the mismatch when we do the alias below. */ |
30 | #define _IO_new_fgetpos64 __renamed__IO_new_fgetpos64 |
31 | #define _IO_fgetpos64 __renamed__IO_fgetpos64 |
32 | |
33 | #include "libioP.h" |
34 | |
35 | #undef _IO_new_fgetpos64 |
36 | #undef _IO_fgetpos64 |
37 | |
38 | #include <errno.h> |
39 | #include <stdlib.h> |
40 | #include <shlib-compat.h> |
41 | |
42 | int |
43 | _IO_new_fgetpos (_IO_FILE *fp, _IO_fpos_t *posp) |
44 | { |
45 | _IO_off64_t pos; |
46 | int result = 0; |
47 | CHECK_FILE (fp, EOF); |
48 | _IO_acquire_lock (fp); |
49 | pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0); |
50 | if (_IO_in_backup (fp) && pos != _IO_pos_BAD) |
51 | { |
52 | if (fp->_mode <= 0) |
53 | pos -= fp->_IO_save_end - fp->_IO_save_base; |
54 | } |
55 | if (pos == _IO_pos_BAD) |
56 | { |
57 | /* ANSI explicitly requires setting errno to a positive value on |
58 | failure. */ |
59 | #ifdef EIO |
60 | if (errno == 0) |
61 | __set_errno (EIO); |
62 | #endif |
63 | result = EOF; |
64 | } |
65 | else if ((_IO_off64_t) (__typeof (posp->__pos)) pos != pos) |
66 | { |
67 | #ifdef EOVERFLOW |
68 | __set_errno (EOVERFLOW); |
69 | #endif |
70 | result = EOF; |
71 | } |
72 | else |
73 | { |
74 | posp->__pos = pos; |
75 | if (fp->_mode > 0 |
76 | && (*fp->_codecvt->__codecvt_do_encoding) (fp->_codecvt) < 0) |
77 | /* This is a stateful encoding, safe the state. */ |
78 | posp->__state = fp->_wide_data->_IO_state; |
79 | } |
80 | |
81 | _IO_release_lock (fp); |
82 | return result; |
83 | } |
84 | |
85 | strong_alias (_IO_new_fgetpos, __new_fgetpos) |
86 | versioned_symbol (libc, _IO_new_fgetpos, _IO_fgetpos, GLIBC_2_2); |
87 | versioned_symbol (libc, __new_fgetpos, fgetpos, GLIBC_2_2); |
88 | |
89 | #ifdef __OFF_T_MATCHES_OFF64_T |
90 | strong_alias (_IO_new_fgetpos, _IO_new_fgetpos64) |
91 | strong_alias (_IO_new_fgetpos64, __new_fgetpos64) |
92 | versioned_symbol (libc, _IO_new_fgetpos64, _IO_fgetpos64, GLIBC_2_2); |
93 | versioned_symbol (libc, __new_fgetpos64, fgetpos64, GLIBC_2_2); |
94 | #endif |
95 | |