1997-04-26 17:21:57 +04:00
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/*
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* bitops.c --- Bitmap frobbing code. See bitops.h for the inlined
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* routines.
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2008-08-28 07:07:54 +04:00
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*
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1997-04-29 20:15:03 +04:00
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* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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2010-05-18 05:31:56 +04:00
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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1997-04-29 20:15:03 +04:00
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* %End-Header%
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1997-04-26 17:21:57 +04:00
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*/
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#include <stdio.h>
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1997-10-20 03:00:21 +04:00
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#if HAVE_SYS_TYPES_H
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1997-04-26 17:21:57 +04:00
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#include <sys/types.h>
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1997-10-20 03:00:21 +04:00
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#endif
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1997-04-26 17:34:30 +04:00
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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#include "ext2_fs.h"
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1997-04-26 17:21:57 +04:00
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#include "ext2fs.h"
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1997-04-26 17:34:30 +04:00
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#ifndef _EXT2_HAVE_ASM_BITOPS_
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1997-04-26 17:21:57 +04:00
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/*
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* For the benefit of those who are trying to port Linux to another
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* architecture, here are some C-language equivalents. You should
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* recode these in the native assmebly language, if at all possible.
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*
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1997-04-26 17:58:21 +04:00
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* C language equivalents written by Theodore Ts'o, 9/26/92.
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* Modified by Pete A. Zaitcev 7/14/95 to be portable to big endian
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* systems, as well as non-32 bit systems.
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1997-04-26 17:21:57 +04:00
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*/
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2005-07-01 03:40:18 +04:00
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int ext2fs_set_bit(unsigned int nr,void * addr)
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1997-04-26 17:21:57 +04:00
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{
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1997-04-26 17:58:21 +04:00
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int mask, retval;
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unsigned char *ADDR = (unsigned char *) addr;
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:58:21 +04:00
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ADDR += nr >> 3;
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mask = 1 << (nr & 0x07);
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2005-02-04 05:56:44 +03:00
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retval = mask & *ADDR;
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1997-04-26 17:21:57 +04:00
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*ADDR |= mask;
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return retval;
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}
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2005-07-01 03:40:18 +04:00
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int ext2fs_clear_bit(unsigned int nr, void * addr)
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1997-04-26 17:21:57 +04:00
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{
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1997-04-26 17:58:21 +04:00
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int mask, retval;
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unsigned char *ADDR = (unsigned char *) addr;
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:58:21 +04:00
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ADDR += nr >> 3;
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mask = 1 << (nr & 0x07);
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2005-02-04 05:56:44 +03:00
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retval = mask & *ADDR;
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1997-04-26 17:21:57 +04:00
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*ADDR &= ~mask;
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return retval;
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}
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2005-07-01 03:40:18 +04:00
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int ext2fs_test_bit(unsigned int nr, const void * addr)
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1997-04-26 17:21:57 +04:00
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{
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1997-04-26 17:58:21 +04:00
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int mask;
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const unsigned char *ADDR = (const unsigned char *) addr;
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:58:21 +04:00
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ADDR += nr >> 3;
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mask = 1 << (nr & 0x07);
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2005-02-04 05:56:44 +03:00
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return (mask & *ADDR);
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1997-04-26 17:21:57 +04:00
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}
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1997-04-26 17:58:21 +04:00
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1997-04-26 17:34:30 +04:00
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#endif /* !_EXT2_HAVE_ASM_BITOPS_ */
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:34:30 +04:00
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void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
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const char *description)
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1997-04-26 17:21:57 +04:00
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{
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1997-11-03 22:16:55 +03:00
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#ifndef OMIT_COM_ERR
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1997-04-26 17:34:30 +04:00
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if (description)
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2003-12-07 09:28:50 +03:00
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com_err(0, errcode, "#%lu for %s", arg, description);
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1997-04-26 17:34:30 +04:00
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else
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2003-12-07 09:28:50 +03:00
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com_err(0, errcode, "#%lu", arg);
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1997-11-03 22:16:55 +03:00
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#endif
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1997-04-26 17:21:57 +04:00
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}
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