http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/xfs/xfs_bit.h

/* * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc. * 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. * * This program is distributed in the hope that it would 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 the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_BIT_H__ #define __XFS_BIT_H__ /* * XFS bit manipulation routines. */ /* * masks with n high/low bits set, 32-bit values & 64-bit values */ #define XFS_MASK32HI(n) xfs_mask32hi(n) static inline __uint32_t xfs_mask32hi(int n) { return (__uint32_t)-1 << (32 - (n)); } #define XFS_MASK64HI(n) xfs_mask64hi(n) static inline __uint64_t xfs_mask64hi(int n) { return (__uint64_t)-1 << (64 - (n)); } #define XFS_MASK32LO(n) xfs_mask32lo(n) static inline __uint32_t xfs_mask32lo(int n) { return ((__uint32_t)1 << (n)) - 1; } #define XFS_MASK64LO(n) xfs_mask64lo(n) static inline __uint64_t xfs_mask64lo(int n) { return ((__uint64_t)1 << (n)) - 1; } /* Get high bit set out of 32-bit argument, -1 if none set */ extern int xfs_highbit32(__uint32_t v); /* Get low bit set out of 64-bit argument, -1 if none set */ extern int xfs_lowbit64(__uint64_t v); /* Get high bit set out of 64-bit argument, -1 if none set */ extern int xfs_highbit64(__uint64_t); /* Count set bits in map starting with start_bit */ extern int xfs_count_bits(uint *map, uint size, uint start_bit); /* Count continuous one bits in map starting with start_bit */ extern int xfs_contig_bits(uint *map, uint size, uint start_bit); /* Find next set bit in map */ extern int xfs_next_bit(uint *map, uint size, uint start_bit); #endif /* __XFS_BIT_H__ */