/* * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright *   notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright *   notice, this list of conditions and the following disclaimer in the *   documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products *   derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup lwext4 * @{ *//** * @file  ext4_bitmap.h * @brief Block/inode bitmap allocator. */ #ifndef EXT4_BITMAP_H_#define EXT4_BITMAP_H_ #ifdef __cplusplusextern "C" {#endif #include <ext4_config.h> #include <stdint.h>#include <stdbool.h> /**@brief   Set bitmap bit. * @param   bmap bitmap * @param   bit bit to set*/static inline void ext4_bmap_bit_set(uint8_t *bmap, uint32_t bit){	*(bmap + (bit >> 3)) |= (1 << (bit & 7));} /**@brief   Clear bitmap bit. * @param   bmap bitmap buffer * @param   bit bit to clear*/static inline void ext4_bmap_bit_clr(uint8_t *bmap, uint32_t bit){	*(bmap + (bit >> 3)) &= ~(1 << (bit & 7));} /**@brief   Check if the bitmap bit is set. * @param   bmap bitmap buffer * @param   bit bit to check*/static inline bool ext4_bmap_is_bit_set(uint8_t *bmap, uint32_t bit){	return (*(bmap + (bit >> 3)) & (1 << (bit & 7)));} /**@brief   Check if the bitmap bit is clear. * @param   bmap bitmap buffer * @param   bit bit to check*/static inline bool ext4_bmap_is_bit_clr(uint8_t *bmap, uint32_t bit){	return !ext4_bmap_is_bit_set(bmap, bit);} /**@brief   Free range of bits in bitmap. * @param   bmap bitmap buffer * @param   sbit start bit * @param   bcnt bit count*/void ext4_bmap_bits_free(uint8_t *bmap, uint32_t sbit, uint32_t bcnt); /**@brief   Find first clear bit in bitmap. * @param   sbit start bit of search * @param   ebit end bit of search * @param   bit_id output parameter (first free bit) * @return  standard error code*/int ext4_bmap_bit_find_clr(uint8_t *bmap, uint32_t sbit, uint32_t ebit,			   uint32_t *bit_id); #ifdef __cplusplus}#endif #endif /* EXT4_BITMAP_H_ */ /** * @} */