e2fsprogs/ext2fs/bitops.h - codeaurora/busybox - Gitiles

 /*
  * bitops.h --- Bitmap frobbing code.  The byte swapping routines are
  * 	also included here.
  *
  * 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%
  *
  * i386 bitops operations taken from <asm/bitops.h>, Copyright 1992,
  * Linus Torvalds.
  */

 #include <strings.h>

 extern int ext2fs_set_bit(int nr,void * addr);
 extern int ext2fs_clear_bit(int nr, void * addr);
 extern int ext2fs_test_bit(int nr, const void * addr);
 extern __u16 ext2fs_swab16(__u16 val);
 extern __u32 ext2fs_swab32(__u32 val);

 #ifdef WORDS_BIGENDIAN
 #define ext2fs_cpu_to_le32(x) ext2fs_swab32((x))
 #define ext2fs_le32_to_cpu(x) ext2fs_swab32((x))
 #define ext2fs_cpu_to_le16(x) ext2fs_swab16((x))
 #define ext2fs_le16_to_cpu(x) ext2fs_swab16((x))
 #define ext2fs_cpu_to_be32(x) ((__u32)(x))
 #define ext2fs_be32_to_cpu(x) ((__u32)(x))
 #define ext2fs_cpu_to_be16(x) ((__u16)(x))
 #define ext2fs_be16_to_cpu(x) ((__u16)(x))
 #else
 #define ext2fs_cpu_to_le32(x) ((__u32)(x))
 #define ext2fs_le32_to_cpu(x) ((__u32)(x))
 #define ext2fs_cpu_to_le16(x) ((__u16)(x))
 #define ext2fs_le16_to_cpu(x) ((__u16)(x))
 #define ext2fs_cpu_to_be32(x) ext2fs_swab32((x))
 #define ext2fs_be32_to_cpu(x) ext2fs_swab32((x))
 #define ext2fs_cpu_to_be16(x) ext2fs_swab16((x))
 #define ext2fs_be16_to_cpu(x) ext2fs_swab16((x))
 #endif

 /*
  * EXT2FS bitmap manipulation routines.
  */

 /* Support for sending warning messages from the inline subroutines */
 extern const char *ext2fs_block_string;
 extern const char *ext2fs_inode_string;
 extern const char *ext2fs_mark_string;
 extern const char *ext2fs_unmark_string;
 extern const char *ext2fs_test_string;
 extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
 			       const char *description);
 extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
 				int code, unsigned long arg);

 extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
 extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
 				       blk_t block);
 extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);

 extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
 extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 				       ext2_ino_t inode);
 extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);

 extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
 					  blk_t block);
 extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
 					    blk_t block);
 extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
 					 blk_t block);

 extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					  ext2_ino_t inode);
 extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					    ext2_ino_t inode);
 extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					 ext2_ino_t inode);
 extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
 extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
 extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
 extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);

 extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					   blk_t block, int num);
 extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					     blk_t block, int num);
 extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					  blk_t block, int num);
 extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 						blk_t block, int num);
 extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 						  blk_t block, int num);
 extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					       blk_t block, int num);
 extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);

 /* These two routines moved to gen_bitmap.c */
 extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
 					 __u32 bitno);
 extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
 					   blk_t bitno);
 /*
  * The inline routines themselves...
  *
  * If NO_INLINE_FUNCS is defined, then we won't try to do inline
  * functions at all; they will be included as normal functions in
  * inline.c
  */
 #ifdef NO_INLINE_FUNCS
 #if (defined(__GNUC__) && (defined(__i386__) || defined(__i486__) || \
 			   defined(__i586__) || defined(__mc68000__) || \
 			   defined(__sparc__)))
 	/* This prevents bitops.c from trying to include the C */
 	/* function version of these functions */
 #define _EXT2_HAVE_ASM_BITOPS_
 #endif
 #endif /* NO_INLINE_FUNCS */

 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
 #ifdef INCLUDE_INLINE_FUNCS
 #define _INLINE_ extern
 #else
 #ifdef __GNUC__
 #define _INLINE_ extern __inline__
 #else				/* For Watcom C */
 #define _INLINE_ extern inline
 #endif
 #endif

 #if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \
      (defined(__i386__) || defined(__i486__) || defined(__i586__)))

 #define _EXT2_HAVE_ASM_BITOPS_
 #define _EXT2_HAVE_ASM_SWAB_
 #define _EXT2_HAVE_ASM_FINDBIT_

 /*
  * These are done by inline assembly for speed reasons.....
  *
  * All bitoperations return 0 if the bit was cleared before the
  * operation and != 0 if it was not.  Bit 0 is the LSB of addr; bit 32
  * is the LSB of (addr+1).
  */

 /*
  * Some hacks to defeat gcc over-optimizations..
  */
 struct __dummy_h { unsigned long a[100]; };
 #define EXT2FS_ADDR (*(struct __dummy_h *) addr)
 #define EXT2FS_CONST_ADDR (*(const struct __dummy_h *) addr)

 _INLINE_ int ext2fs_set_bit(int nr, void * addr)
 {
 	int oldbit;

 	__asm__ __volatile__("btsl %2,%1\n\tsbbl %0,%0"
 		:"=r" (oldbit),"=m" (EXT2FS_ADDR)
 		:"r" (nr));
 	return oldbit;
 }

 _INLINE_ int ext2fs_clear_bit(int nr, void * addr)
 {
 	int oldbit;

 	__asm__ __volatile__("btrl %2,%1\n\tsbbl %0,%0"
 		:"=r" (oldbit),"=m" (EXT2FS_ADDR)
 		:"r" (nr));
 	return oldbit;
 }

 _INLINE_ int ext2fs_test_bit(int nr, const void * addr)
 {
 	int oldbit;

 	__asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0"
 		:"=r" (oldbit)
 		:"m" (EXT2FS_CONST_ADDR),"r" (nr));
 	return oldbit;
 }

 #if 0
 _INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size)
 {
 	int d0, d1, d2;
 	int res;

 	if (!size)
 		return 0;
 	/* This looks at memory. Mark it volatile to tell gcc not to move it around */
 	__asm__ __volatile__(
 		"cld\n\t"
 		"xorl %%eax,%%eax\n\t"
 		"xorl %%edx,%%edx\n\t"
 		"repe; scasl\n\t"
 		"je 1f\n\t"
 		"movl -4(%%edi),%%eax\n\t"
 		"subl $4,%%edi\n\t"
 		"bsfl %%eax,%%edx\n"
 		"1:\tsubl %%esi,%%edi\n\t"
 		"shll $3,%%edi\n\t"
 		"addl %%edi,%%edx"
 		:"=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2)
 		:"1" ((size + 31) >> 5), "2" (addr), "S" (addr));
 	return res;
 }

 _INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset)
 {
 	unsigned long * p = ((unsigned long *) addr) + (offset >> 5);
 	int set = 0, bit = offset & 31, res;

 	if (bit) {
 		/*
 		 * Look for zero in first byte
 		 */
 		__asm__("bsfl %1,%0\n\t"
 			"jne 1f\n\t"
 			"movl $32, %0\n"
 			"1:"
 			: "=r" (set)
 			: "r" (*p >> bit));
 		if (set < (32 - bit))
 			return set + offset;
 		set = 32 - bit;
 		p++;
 	}
 	/*
 	 * No bit found yet, search remaining full bytes for a bit
 	 */
 	res = ext2fs_find_first_bit_set(p, size - 32 * (p - (unsigned long *) addr));
 	return (offset + set + res);
 }
 #endif

 #ifdef EXT2FS_ENABLE_SWAPFS
 _INLINE_ __u32 ext2fs_swab32(__u32 val)
 {
 #ifdef EXT2FS_REQUIRE_486
 	__asm__("bswap %0" : "=r" (val) : "0" (val));
 #else
 	__asm__("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
 		"rorl $16,%0\n\t"	/* swap words		*/
 		"xchgb %b0,%h0"		/* swap higher bytes	*/
 		:"=q" (val)
 		: "0" (val));
 #endif
 	return val;
 }

 _INLINE_ __u16 ext2fs_swab16(__u16 val)
 {
 	__asm__("xchgb %b0,%h0"		/* swap bytes		*/ \
 		: "=q" (val) \
 		:  "0" (val)); \
 		return val;
 }
 #endif

 #undef EXT2FS_ADDR

 #endif	/* i386 */

 #ifdef __mc68000__

 #define _EXT2_HAVE_ASM_BITOPS_

 _INLINE_ int ext2fs_set_bit(int nr,void * addr)
 {
 	char retval;

 	__asm__ __volatile__ ("bfset %2@{%1:#1}; sne %0"
 	     : "=d" (retval) : "d" (nr^7), "a" (addr));

 	return retval;
 }

 _INLINE_ int ext2fs_clear_bit(int nr, void * addr)
 {
 	char retval;

 	__asm__ __volatile__ ("bfclr %2@{%1:#1}; sne %0"
 	     : "=d" (retval) : "d" (nr^7), "a" (addr));

 	return retval;
 }

 _INLINE_ int ext2fs_test_bit(int nr, const void * addr)
 {
 	char retval;

 	__asm__ __volatile__ ("bftst %2@{%1:#1}; sne %0"
 	     : "=d" (retval) : "d" (nr^7), "a" (addr));

 	return retval;
 }

 #endif /* __mc68000__ */


 #if !defined(_EXT2_HAVE_ASM_SWAB_) && defined(EXT2FS_ENABLE_SWAPFS)

 _INLINE_ __u16 ext2fs_swab16(__u16 val)
 {
 	return (val >> 8) | (val << 8);
 }

 _INLINE_ __u32 ext2fs_swab32(__u32 val)
 {
 	return ((val>>24) | ((val>>8)&0xFF00) |
 		((val<<8)&0xFF0000) | (val<<24));
 }

 #endif /* !_EXT2_HAVE_ASM_SWAB */

 #if !defined(_EXT2_HAVE_ASM_FINDBIT_)
 _INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size)
 {
 	unsigned char *cp = (unsigned char *) addr;
 	int res = 0, d0;

 	if (!size)
 		return 0;

 	while ((size > res) && (*cp == 0)) {
 		cp++;
 		res += 8;
 	}
 	d0 = ffs(*cp);
 	if (d0 == 0)
 		return size;

 	return res + d0 - 1;
 }

 _INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset)
 {
 	unsigned char * p;
 	int set = 0, bit = offset & 7, res = 0, d0;

 	res = offset >> 3;
 	p = ((unsigned char *) addr) + res;

 	if (bit) {
 		set = ffs(*p & ~((1 << bit) - 1));
 		if (set)
 			return (offset & ~7) + set - 1;
 		p++;
 		res += 8;
 	}
 	while ((size > res) && (*p == 0)) {
 		p++;
 		res += 8;
 	}
 	d0 = ffs(*p);
 	if (d0 == 0)
 		return size;

 	return (res + d0 - 1);
 }
 #endif

 _INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
 					blk_t bitno);

 _INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
 					blk_t bitno)
 {
 	if ((bitno < bitmap->start) || (bitno > bitmap->end)) {
 		ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno);
 		return 0;
 	}
 	return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap,
 				       blk_t block)
 {
 	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap)
 				       bitmap,
 					  block);
 }

 _INLINE_ int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
 					 blk_t block)
 {
 	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
 					    block);
 }

 _INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap,
 				       blk_t block)
 {
 	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
 					  block);
 }

 _INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 				       ext2_ino_t inode)
 {
 	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
 					  inode);
 }

 _INLINE_ int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					 ext2_ino_t inode)
 {
 	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
 				     inode);
 }

 _INLINE_ int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
 				       ext2_ino_t inode)
 {
 	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
 					  inode);
 }

 _INLINE_ void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
 					    blk_t block)
 {
 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((block < bitmap->start) || (block > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
 				   bitmap->description);
 		return;
 	}
 #endif
 	ext2fs_set_bit(block - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
 					      blk_t block)
 {
 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((block < bitmap->start) || (block > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK,
 				   block, bitmap->description);
 		return;
 	}
 #endif
 	ext2fs_clear_bit(block - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
 					    blk_t block)
 {
 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((block < bitmap->start) || (block > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
 				   block, bitmap->description);
 		return 0;
 	}
 #endif
 	return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					    ext2_ino_t inode)
 {
 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((inode < bitmap->start) || (inode > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_MARK,
 				   inode, bitmap->description);
 		return;
 	}
 #endif
 	ext2fs_set_bit(inode - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					      ext2_ino_t inode)
 {
 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((inode < bitmap->start) || (inode > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_UNMARK,
 				   inode, bitmap->description);
 		return;
 	}
 #endif
 	ext2fs_clear_bit(inode - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
 					   ext2_ino_t inode)
 {
 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((inode < bitmap->start) || (inode > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_TEST,
 				   inode, bitmap->description);
 		return 0;
 	}
 #endif
 	return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap)
 {
 	return bitmap->start;
 }

 _INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap)
 {
 	return bitmap->start;
 }

 _INLINE_ blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap)
 {
 	return bitmap->end;
 }

 _INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap)
 {
 	return bitmap->end;
 }

 _INLINE_ int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					    blk_t block, int num)
 {
 	int	i;

 	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
 				   block, bitmap->description);
 		return 0;
 	}
 	for (i=0; i < num; i++) {
 		if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
 			return 0;
 	}
 	return 1;
 }

 _INLINE_ int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
 						 blk_t block, int num)
 {
 	int	i;

 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
 				   block, bitmap->description);
 		return 0;
 	}
 #endif
 	for (i=0; i < num; i++) {
 		if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
 			return 0;
 	}
 	return 1;
 }

 _INLINE_ void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					     blk_t block, int num)
 {
 	int	i;

 	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
 				   bitmap->description);
 		return;
 	}
 	for (i=0; i < num; i++)
 		ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 						  blk_t block, int num)
 {
 	int	i;

 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
 				   bitmap->description);
 		return;
 	}
 #endif
 	for (i=0; i < num; i++)
 		ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 					       blk_t block, int num)
 {
 	int	i;

 	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
 				   bitmap->description);
 		return;
 	}
 	for (i=0; i < num; i++)
 		ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
 }

 _INLINE_ void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
 						    blk_t block, int num)
 {
 	int	i;

 #ifdef EXT2FS_DEBUG_FAST_OPS
 	if ((block < bitmap->start) || (block+num-1 > bitmap->end)) {
 		ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
 				   bitmap->description);
 		return;
 	}
 #endif
 	for (i=0; i < num; i++)
 		ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
 }
 #undef _INLINE_
 #endif
	/*
	* bitops.h --- Bitmap frobbing code. The byte swapping routines are
	* also included here.
	*
	* 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%
	*
	* i386 bitops operations taken from <asm/bitops.h>, Copyright 1992,
	* Linus Torvalds.
	*/

	#include <strings.h>

	extern int ext2fs_set_bit(int nr,void * addr);
	extern int ext2fs_clear_bit(int nr, void * addr);
	extern int ext2fs_test_bit(int nr, const void * addr);
	extern __u16 ext2fs_swab16(__u16 val);
	extern __u32 ext2fs_swab32(__u32 val);

	#ifdef WORDS_BIGENDIAN
	#define ext2fs_cpu_to_le32(x) ext2fs_swab32((x))
	#define ext2fs_le32_to_cpu(x) ext2fs_swab32((x))
	#define ext2fs_cpu_to_le16(x) ext2fs_swab16((x))
	#define ext2fs_le16_to_cpu(x) ext2fs_swab16((x))
	#define ext2fs_cpu_to_be32(x) ((__u32)(x))
	#define ext2fs_be32_to_cpu(x) ((__u32)(x))
	#define ext2fs_cpu_to_be16(x) ((__u16)(x))
	#define ext2fs_be16_to_cpu(x) ((__u16)(x))
	#else
	#define ext2fs_cpu_to_le32(x) ((__u32)(x))
	#define ext2fs_le32_to_cpu(x) ((__u32)(x))
	#define ext2fs_cpu_to_le16(x) ((__u16)(x))
	#define ext2fs_le16_to_cpu(x) ((__u16)(x))
	#define ext2fs_cpu_to_be32(x) ext2fs_swab32((x))
	#define ext2fs_be32_to_cpu(x) ext2fs_swab32((x))
	#define ext2fs_cpu_to_be16(x) ext2fs_swab16((x))
	#define ext2fs_be16_to_cpu(x) ext2fs_swab16((x))
	#endif

	/*
	* EXT2FS bitmap manipulation routines.
	*/

	/* Support for sending warning messages from the inline subroutines */
	extern const char *ext2fs_block_string;
	extern const char *ext2fs_inode_string;
	extern const char *ext2fs_mark_string;
	extern const char *ext2fs_unmark_string;
	extern const char *ext2fs_test_string;
	extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
	const char *description);
	extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
	int code, unsigned long arg);

	extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
	extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block);
	extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);

	extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
	extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode);
	extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);

	extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block);
	extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block);
	extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block);

	extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode);
	extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode);
	extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode);
	extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
	extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
	extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
	extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);

	extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num);
	extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num);
	extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num);
	extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num);
	extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num);
	extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num);
	extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);

	/* These two routines moved to gen_bitmap.c */
	extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
	__u32 bitno);
	extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
	blk_t bitno);
	/*
	* The inline routines themselves...
	*
	* If NO_INLINE_FUNCS is defined, then we won't try to do inline
	* functions at all; they will be included as normal functions in
	* inline.c
	*/
	#ifdef NO_INLINE_FUNCS
	#if (defined(__GNUC__) && (defined(__i386__) \|\| defined(__i486__) \|\| \
	defined(__i586__) \|\| defined(__mc68000__) \|\| \
	defined(__sparc__)))
	/* This prevents bitops.c from trying to include the C */
	/* function version of these functions */
	#define _EXT2_HAVE_ASM_BITOPS_
	#endif
	#endif /* NO_INLINE_FUNCS */

	#if (defined(INCLUDE_INLINE_FUNCS) \|\| !defined(NO_INLINE_FUNCS))
	#ifdef INCLUDE_INLINE_FUNCS
	#define _INLINE_ extern
	#else
	#ifdef __GNUC__
	#define _INLINE_ extern __inline__
	#else /* For Watcom C */
	#define _INLINE_ extern inline
	#endif
	#endif

	#if ((defined __GNUC__) && !defined(_EXT2_USE_C_VERSIONS_) && \
	(defined(__i386__) \|\| defined(__i486__) \|\| defined(__i586__)))

	#define _EXT2_HAVE_ASM_BITOPS_
	#define _EXT2_HAVE_ASM_SWAB_
	#define _EXT2_HAVE_ASM_FINDBIT_

	/*
	* These are done by inline assembly for speed reasons.....
	*
	* All bitoperations return 0 if the bit was cleared before the
	* operation and != 0 if it was not. Bit 0 is the LSB of addr; bit 32
	* is the LSB of (addr+1).
	*/

	/*
	* Some hacks to defeat gcc over-optimizations..
	*/
	struct __dummy_h { unsigned long a[100]; };
	#define EXT2FS_ADDR ((struct __dummy_h ) addr)
	#define EXT2FS_CONST_ADDR ((const struct __dummy_h ) addr)

	_INLINE_ int ext2fs_set_bit(int nr, void * addr)
	{
	int oldbit;

	__asm__ __volatile__("btsl %2,%1\n\tsbbl %0,%0"
	:"=r" (oldbit),"=m" (EXT2FS_ADDR)
	:"r" (nr));
	return oldbit;
	}

	_INLINE_ int ext2fs_clear_bit(int nr, void * addr)
	{
	int oldbit;

	__asm__ __volatile__("btrl %2,%1\n\tsbbl %0,%0"
	:"=r" (oldbit),"=m" (EXT2FS_ADDR)
	:"r" (nr));
	return oldbit;
	}

	_INLINE_ int ext2fs_test_bit(int nr, const void * addr)
	{
	int oldbit;

	__asm__ __volatile__("btl %2,%1\n\tsbbl %0,%0"
	:"=r" (oldbit)
	:"m" (EXT2FS_CONST_ADDR),"r" (nr));
	return oldbit;
	}

	#if 0
	_INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size)
	{
	int d0, d1, d2;
	int res;

	if (!size)
	return 0;
	/* This looks at memory. Mark it volatile to tell gcc not to move it around */
	__asm__ __volatile__(
	"cld\n\t"
	"xorl %%eax,%%eax\n\t"
	"xorl %%edx,%%edx\n\t"
	"repe; scasl\n\t"
	"je 1f\n\t"
	"movl -4(%%edi),%%eax\n\t"
	"subl $4,%%edi\n\t"
	"bsfl %%eax,%%edx\n"
	"1:\tsubl %%esi,%%edi\n\t"
	"shll $3,%%edi\n\t"
	"addl %%edi,%%edx"
	:"=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2)
	:"1" ((size + 31) >> 5), "2" (addr), "S" (addr));
	return res;
	}

	_INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset)
	{
	unsigned long * p = ((unsigned long *) addr) + (offset >> 5);
	int set = 0, bit = offset & 31, res;

	if (bit) {
	/*
	* Look for zero in first byte
	*/
	__asm__("bsfl %1,%0\n\t"
	"jne 1f\n\t"
	"movl $32, %0\n"
	"1:"
	: "=r" (set)
	: "r" (*p >> bit));
	if (set < (32 - bit))
	return set + offset;
	set = 32 - bit;
	p++;
	}
	/*
	* No bit found yet, search remaining full bytes for a bit
	*/
	res = ext2fs_find_first_bit_set(p, size - 32 * (p - (unsigned long *) addr));
	return (offset + set + res);
	}
	#endif

	#ifdef EXT2FS_ENABLE_SWAPFS
	_INLINE_ __u32 ext2fs_swab32(__u32 val)
	{
	#ifdef EXT2FS_REQUIRE_486
	__asm__("bswap %0" : "=r" (val) : "0" (val));
	#else
	__asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
	"rorl $16,%0\n\t" /* swap words */
	"xchgb %b0,%h0" /* swap higher bytes */
	:"=q" (val)
	: "0" (val));
	#endif
	return val;
	}

	_INLINE_ __u16 ext2fs_swab16(__u16 val)
	{
	__asm__("xchgb %b0,%h0" /* swap bytes */ \
	: "=q" (val) \
	: "0" (val)); \
	return val;
	}
	#endif

	#undef EXT2FS_ADDR

	#endif /* i386 */

	#ifdef __mc68000__

	#define _EXT2_HAVE_ASM_BITOPS_

	_INLINE_ int ext2fs_set_bit(int nr,void * addr)
	{
	char retval;

	__asm__ __volatile__ ("bfset %2@{%1:#1}; sne %0"
	: "=d" (retval) : "d" (nr^7), "a" (addr));

	return retval;
	}

	_INLINE_ int ext2fs_clear_bit(int nr, void * addr)
	{
	char retval;

	__asm__ __volatile__ ("bfclr %2@{%1:#1}; sne %0"
	: "=d" (retval) : "d" (nr^7), "a" (addr));

	return retval;
	}

	_INLINE_ int ext2fs_test_bit(int nr, const void * addr)
	{
	char retval;

	__asm__ __volatile__ ("bftst %2@{%1:#1}; sne %0"
	: "=d" (retval) : "d" (nr^7), "a" (addr));

	return retval;
	}

	#endif /* __mc68000__ */


	#if !defined(_EXT2_HAVE_ASM_SWAB_) && defined(EXT2FS_ENABLE_SWAPFS)

	_INLINE_ __u16 ext2fs_swab16(__u16 val)
	{
	return (val >> 8) \| (val << 8);
	}

	_INLINE_ __u32 ext2fs_swab32(__u32 val)
	{
	return ((val>>24) \| ((val>>8)&0xFF00) \|
	((val<<8)&0xFF0000) \| (val<<24));
	}

	#endif /* !_EXT2_HAVE_ASM_SWAB */

	#if !defined(_EXT2_HAVE_ASM_FINDBIT_)
	_INLINE_ int ext2fs_find_first_bit_set(void * addr, unsigned size)
	{
	unsigned char cp = (unsigned char ) addr;
	int res = 0, d0;

	if (!size)
	return 0;

	while ((size > res) && (*cp == 0)) {
	cp++;
	res += 8;
	}
	d0 = ffs(*cp);
	if (d0 == 0)
	return size;

	return res + d0 - 1;
	}

	_INLINE_ int ext2fs_find_next_bit_set (void * addr, int size, int offset)
	{
	unsigned char * p;
	int set = 0, bit = offset & 7, res = 0, d0;

	res = offset >> 3;
	p = ((unsigned char *) addr) + res;

	if (bit) {
	set = ffs(*p & ~((1 << bit) - 1));
	if (set)
	return (offset & ~7) + set - 1;
	p++;
	res += 8;
	}
	while ((size > res) && (*p == 0)) {
	p++;
	res += 8;
	}
	d0 = ffs(*p);
	if (d0 == 0)
	return size;

	return (res + d0 - 1);
	}
	#endif

	_INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
	blk_t bitno);

	_INLINE_ int ext2fs_test_generic_bitmap(ext2fs_generic_bitmap bitmap,
	blk_t bitno)
	{
	if ((bitno < bitmap->start) \|\| (bitno > bitmap->end)) {
	ext2fs_warn_bitmap2(bitmap, EXT2FS_TEST_ERROR, bitno);
	return 0;
	}
	return ext2fs_test_bit(bitno - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block)
	{
	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap)
	bitmap,
	block);
	}

	_INLINE_ int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block)
	{
	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
	block);
	}

	_INLINE_ int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block)
	{
	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
	block);
	}

	_INLINE_ int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode)
	{
	return ext2fs_mark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
	inode);
	}

	_INLINE_ int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode)
	{
	return ext2fs_unmark_generic_bitmap((ext2fs_generic_bitmap) bitmap,
	inode);
	}

	_INLINE_ int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode)
	{
	return ext2fs_test_generic_bitmap((ext2fs_generic_bitmap) bitmap,
	inode);
	}

	_INLINE_ void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block)
	{
	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((block < bitmap->start) \|\| (block > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
	bitmap->description);
	return;
	}
	#endif
	ext2fs_set_bit(block - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block)
	{
	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((block < bitmap->start) \|\| (block > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK,
	block, bitmap->description);
	return;
	}
	#endif
	ext2fs_clear_bit(block - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
	blk_t block)
	{
	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((block < bitmap->start) \|\| (block > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
	block, bitmap->description);
	return 0;
	}
	#endif
	return ext2fs_test_bit(block - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode)
	{
	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((inode < bitmap->start) \|\| (inode > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_MARK,
	inode, bitmap->description);
	return;
	}
	#endif
	ext2fs_set_bit(inode - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode)
	{
	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((inode < bitmap->start) \|\| (inode > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_UNMARK,
	inode, bitmap->description);
	return;
	}
	#endif
	ext2fs_clear_bit(inode - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
	ext2_ino_t inode)
	{
	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((inode < bitmap->start) \|\| (inode > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_INODE_TEST,
	inode, bitmap->description);
	return 0;
	}
	#endif
	return ext2fs_test_bit(inode - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap)
	{
	return bitmap->start;
	}

	_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap)
	{
	return bitmap->start;
	}

	_INLINE_ blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap)
	{
	return bitmap->end;
	}

	_INLINE_ ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap)
	{
	return bitmap->end;
	}

	_INLINE_ int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num)
	{
	int i;

	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
	block, bitmap->description);
	return 0;
	}
	for (i=0; i < num; i++) {
	if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
	return 0;
	}
	return 1;
	}

	_INLINE_ int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num)
	{
	int i;

	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_TEST,
	block, bitmap->description);
	return 0;
	}
	#endif
	for (i=0; i < num; i++) {
	if (ext2fs_fast_test_block_bitmap(bitmap, block+i))
	return 0;
	}
	return 1;
	}

	_INLINE_ void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num)
	{
	int i;

	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
	bitmap->description);
	return;
	}
	for (i=0; i < num; i++)
	ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num)
	{
	int i;

	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_MARK, block,
	bitmap->description);
	return;
	}
	#endif
	for (i=0; i < num; i++)
	ext2fs_set_bit(block + i - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num)
	{
	int i;

	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
	bitmap->description);
	return;
	}
	for (i=0; i < num; i++)
	ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
	}

	_INLINE_ void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
	blk_t block, int num)
	{
	int i;

	#ifdef EXT2FS_DEBUG_FAST_OPS
	if ((block < bitmap->start) \|\| (block+num-1 > bitmap->end)) {
	ext2fs_warn_bitmap(EXT2_ET_BAD_BLOCK_UNMARK, block,
	bitmap->description);
	return;
	}
	#endif
	for (i=0; i < num; i++)
	ext2fs_clear_bit(block + i - bitmap->start, bitmap->bitmap);
	}
	#undef _INLINE_
	#endif