From d1e063beb43e595680c65e3804d1f8ddff53373b Mon Sep 17 00:00:00 2001 From: Guido Guenther Date: Sat, 18 Nov 2006 23:48:07 +0100 Subject: Imported Debian version 0.3.8.8 --- e2fslib/bitops.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 e2fslib/bitops.c (limited to 'e2fslib/bitops.c') diff --git a/e2fslib/bitops.c b/e2fslib/bitops.c new file mode 100644 index 0000000..e27c5a0 --- /dev/null +++ b/e2fslib/bitops.c @@ -0,0 +1,91 @@ +/* + * 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 +#if HAVE_SYS_TYPES_H +#include +#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) != 0; + *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) != 0; + *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) != 0); +} + +#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, "#%u for %s", arg, description); + else + com_err(0, errcode, "#%u", 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, + "#%u for %s", arg, bitmap->description); + else + com_err(0, bitmap->base_error_code + code, "#%u", arg); +#endif +} + -- cgit v1.2.3