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Diffstat (limited to 'mysql/mysys/my_seek.c')
| -rw-r--r-- | mysql/mysys/my_seek.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/mysql/mysys/my_seek.c b/mysql/mysys/my_seek.c deleted file mode 100644 index 3a73e06..0000000 --- a/mysql/mysys/my_seek.c +++ /dev/null @@ -1,111 +0,0 @@ -/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ - -#include "mysys_priv.h" -#include "my_sys.h" -#include "mysys_err.h" -#include "my_thread_local.h" - -/* - Seek to a position in a file. - - ARGUMENTS - File fd The file descriptor - my_off_t pos The expected position (absolute or relative) - int whence A direction parameter and one of - {SEEK_SET, SEEK_CUR, SEEK_END} - myf MyFlags MY_THREADSAFE must be set in case my_seek may be mixed - with my_pread/my_pwrite calls and fd is shared among - threads. - - DESCRIPTION - The my_seek function is a wrapper around the system call lseek and - repositions the offset of the file descriptor fd to the argument - offset according to the directive whence as follows: - SEEK_SET The offset is set to offset bytes. - SEEK_CUR The offset is set to its current location plus offset bytes - SEEK_END The offset is set to the size of the file plus offset bytes - - RETURN VALUE - my_off_t newpos The new position in the file. - MY_FILEPOS_ERROR An error was encountered while performing - the seek. my_errno is set to indicate the - actual error. -*/ - -my_off_t my_seek(File fd, my_off_t pos, int whence, myf MyFlags) -{ - os_off_t newpos= -1; - DBUG_ENTER("my_seek"); - DBUG_PRINT("my",("fd: %d Pos: %llu Whence: %d MyFlags: %d", - fd, (ulonglong) pos, whence, MyFlags)); - - /* - Make sure we are using a valid file descriptor! - */ - DBUG_ASSERT(fd != -1); -#if defined (_WIN32) - newpos= my_win_lseek(fd, pos, whence); -#else - newpos= lseek(fd, pos, whence); -#endif - if (newpos == (os_off_t) -1) - { - set_my_errno(errno); - if (MyFlags & MY_WME) - { - char errbuf[MYSYS_STRERROR_SIZE]; - my_error(EE_CANT_SEEK, MYF(0), my_filename(fd), - my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno())); - } - DBUG_PRINT("error", ("lseek: %llu errno: %d", (ulonglong) newpos, errno)); - DBUG_RETURN(MY_FILEPOS_ERROR); - } - if ((my_off_t) newpos != pos) - { - DBUG_PRINT("exit",("pos: %llu", (ulonglong) newpos)); - } - DBUG_RETURN((my_off_t) newpos); -} /* my_seek */ - - - /* Tell current position of file */ - /* ARGSUSED */ - -my_off_t my_tell(File fd, myf MyFlags) -{ - os_off_t pos; - DBUG_ENTER("my_tell"); - DBUG_PRINT("my",("fd: %d MyFlags: %d",fd, MyFlags)); - DBUG_ASSERT(fd >= 0); -#if defined (HAVE_TELL) && !defined (_WIN32) - pos= tell(fd); -#else - pos= my_seek(fd, 0L, MY_SEEK_CUR,0); -#endif - if (pos == (os_off_t) -1) - { - set_my_errno(errno); - if (MyFlags & MY_WME) - { - char errbuf[MYSYS_STRERROR_SIZE]; - my_error(EE_CANT_SEEK, MYF(0), my_filename(fd), - my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno())); - } - DBUG_PRINT("error", ("tell: %llu errno: %d", (ulonglong) pos, my_errno())); - } - DBUG_PRINT("exit",("pos: %llu", (ulonglong) pos)); - DBUG_RETURN((my_off_t) pos); -} /* my_tell */ |