diff options
Diffstat (limited to 'REORG.TODO/libio/ioftell.c')
-rw-r--r-- | REORG.TODO/libio/ioftell.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/REORG.TODO/libio/ioftell.c b/REORG.TODO/libio/ioftell.c new file mode 100644 index 0000000000..21ba5fc6e3 --- /dev/null +++ b/REORG.TODO/libio/ioftell.c @@ -0,0 +1,66 @@ +/* Copyright (C) 1993-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. + + As a special exception, if you link the code in this file with + files compiled with a GNU compiler to produce an executable, + that does not cause the resulting executable to be covered by + the GNU Lesser General Public License. This exception does not + however invalidate any other reasons why the executable file + might be covered by the GNU Lesser General Public License. + This exception applies to code released by its copyright holders + in files containing the exception. */ + +#include "libioP.h" +#include <stdlib.h> +#include <errno.h> +/* ANSI explicily requires setting errno to a positive value on failure. */ + +long int +_IO_ftell (_IO_FILE *fp) +{ + _IO_off64_t pos; + CHECK_FILE (fp, -1L); + _IO_acquire_lock (fp); + pos = _IO_seekoff_unlocked (fp, 0, _IO_seek_cur, 0); + if (_IO_in_backup (fp) && pos != _IO_pos_BAD) + { + if (_IO_vtable_offset (fp) != 0 || fp->_mode <= 0) + pos -= fp->_IO_save_end - fp->_IO_save_base; + } + _IO_release_lock (fp); + if (pos == _IO_pos_BAD) + { +#ifdef EIO + if (errno == 0) + __set_errno (EIO); +#endif + return -1L; + } + if ((_IO_off64_t) (long int) pos != pos) + { +#ifdef EOVERFLOW + __set_errno (EOVERFLOW); +#endif + return -1L; + } + return pos; +} +libc_hidden_def (_IO_ftell) + +#ifdef weak_alias +weak_alias (_IO_ftell, ftell) +#endif |