145 lines
4.1 KiB
C
Executable File
145 lines
4.1 KiB
C
Executable File
/*
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libparted - a library for manipulating disk partitions
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Copyright (C) 2000, 2007-2014, 2019-2023 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \addtogroup PedAlignment
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* @{
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*/
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/** \file natmath.h */
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#ifndef PED_NATMATH_H_INCLUDED
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#define PED_NATMATH_H_INCLUDED
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typedef struct _PedAlignment PedAlignment;
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#include <parted/disk.h>
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#include <parted/device.h>
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#include <parted/geom.h>
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#define PED_MIN(a, b) ( ((a)<(b)) ? (a) : (b) )
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#define PED_MAX(a, b) ( ((a)>(b)) ? (a) : (b) )
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/* this is weird (I'm still not sure I should be doing this!)
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*
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* For the functions: new, destroy, duplicate and merge: the following values
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* for align are valid:
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* * align == NULL (!) represents no solution
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* * align->grain_size == 0 represents a single solution
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* (align->offset)
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* * align->grain_size > 0 represents a set of solutions
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*
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* These are invalid:
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* * align->offset < 0 Note: this gets "normalized"
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* * align->grain_size < 0
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*
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* For the align_* operations, there must be a solution. i.e. align != NULL
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* All solutions must be greater than zero.
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*/
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struct _PedAlignment {
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PedSector offset;
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PedSector grain_size;
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};
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extern PedSector ped_round_up_to (PedSector sector, PedSector grain_size)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__const__))
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#endif
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;
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extern PedSector ped_round_down_to (PedSector sector, PedSector grain_size)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__const__))
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#endif
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;
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extern PedSector ped_round_to_nearest (PedSector sector, PedSector grain_size)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__const__))
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#endif
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;
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extern PedSector ped_greatest_common_divisor (PedSector a, PedSector b)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__pure__))
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#endif
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;
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extern int ped_alignment_init (PedAlignment* align, PedSector offset,
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PedSector grain_size);
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extern PedAlignment* ped_alignment_new (PedSector offset, PedSector grain_size);
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extern void ped_alignment_destroy (PedAlignment* align);
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extern PedAlignment* ped_alignment_duplicate (const PedAlignment* align);
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extern PedAlignment* ped_alignment_intersect (const PedAlignment* a,
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const PedAlignment* b);
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extern PedSector
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ped_alignment_align_up (const PedAlignment* align, const PedGeometry* geom,
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PedSector sector)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__pure__))
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#endif
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;
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extern PedSector
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ped_alignment_align_down (const PedAlignment* align, const PedGeometry* geom,
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PedSector sector)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__pure__))
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#endif
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;
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extern PedSector
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ped_alignment_align_nearest (const PedAlignment* align, const PedGeometry* geom,
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PedSector sector)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__pure__))
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#endif
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;
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extern int
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ped_alignment_is_aligned (const PedAlignment* align, const PedGeometry* geom,
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PedSector sector)
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
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__attribute ((__pure__))
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#endif
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;
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extern const PedAlignment* ped_alignment_any;
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extern const PedAlignment* ped_alignment_none;
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static inline PedSector
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ped_div_round_up (PedSector numerator, PedSector divisor)
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{
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return (numerator + divisor - 1) / divisor;
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}
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static inline PedSector
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ped_div_round_to_nearest (PedSector numerator, PedSector divisor)
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{
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return (numerator + divisor/2) / divisor;
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}
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#endif /* PED_NATMATH_H_INCLUDED */
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/**
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* @}
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*/
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