mirror of
https://github.com/sheumann/hush.git
synced 2024-12-23 05:29:58 +00:00
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/*
|
|
* bitops.c --- Bitmap frobbing code. See bitops.h for the inlined
|
|
* routines.
|
|
*
|
|
* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Public
|
|
* License.
|
|
* %End-Header%
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#if HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fs.h"
|
|
|
|
#ifndef _EXT2_HAVE_ASM_BITOPS_
|
|
|
|
/*
|
|
* For the benefit of those who are trying to port Linux to another
|
|
* architecture, here are some C-language equivalents. You should
|
|
* recode these in the native assmebly language, if at all possible.
|
|
*
|
|
* C language equivalents written by Theodore Ts'o, 9/26/92.
|
|
* Modified by Pete A. Zaitcev 7/14/95 to be portable to big endian
|
|
* systems, as well as non-32 bit systems.
|
|
*/
|
|
|
|
int ext2fs_set_bit(int nr,void * addr)
|
|
{
|
|
int mask, retval;
|
|
unsigned char *ADDR = (unsigned char *) addr;
|
|
|
|
ADDR += nr >> 3;
|
|
mask = 1 << (nr & 0x07);
|
|
retval = mask & *ADDR;
|
|
*ADDR |= mask;
|
|
return retval;
|
|
}
|
|
|
|
int ext2fs_clear_bit(int nr, void * addr)
|
|
{
|
|
int mask, retval;
|
|
unsigned char *ADDR = (unsigned char *) addr;
|
|
|
|
ADDR += nr >> 3;
|
|
mask = 1 << (nr & 0x07);
|
|
retval = mask & *ADDR;
|
|
*ADDR &= ~mask;
|
|
return retval;
|
|
}
|
|
|
|
int ext2fs_test_bit(int nr, const void * addr)
|
|
{
|
|
int mask;
|
|
const unsigned char *ADDR = (const unsigned char *) addr;
|
|
|
|
ADDR += nr >> 3;
|
|
mask = 1 << (nr & 0x07);
|
|
return (mask & *ADDR);
|
|
}
|
|
|
|
#endif /* !_EXT2_HAVE_ASM_BITOPS_ */
|
|
|
|
void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
|
|
const char *description)
|
|
{
|
|
#ifndef OMIT_COM_ERR
|
|
if (description)
|
|
com_err(0, errcode, "#%lu for %s", arg, description);
|
|
else
|
|
com_err(0, errcode, "#%lu", arg);
|
|
#endif
|
|
}
|
|
|
|
void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
|
|
int code, unsigned long arg)
|
|
{
|
|
#ifndef OMIT_COM_ERR
|
|
if (bitmap->description)
|
|
com_err(0, bitmap->base_error_code+code,
|
|
"#%lu for %s", arg, bitmap->description);
|
|
else
|
|
com_err(0, bitmap->base_error_code + code, "#%lu", arg);
|
|
#endif
|
|
}
|
|
|