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- /*
- libparted - a library for manipulating disk partitions
- Copyright (C) 2000 Free Software Foundation, Inc.
-
- 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; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will 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 to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
- #ifndef PED_NATMATH_H_INCLUDED
- #define PED_NATMATH_H_INCLUDED
-
- typedef struct _PedAlignment PedAlignment;
-
- #include <parted/disk.h>
-
- #define PED_MIN(a, b) ( ((a)<(b)) ? (a) : (b) )
- #define PED_MAX(a, b) ( ((a)>(b)) ? (a) : (b) )
-
- /* this is weird (I'm still not sure I should be doing this!)
- *
- * For the functions: new, destroy, duplicate and merge: the following values
- * for align are valid:
- * * align == NULL (!) represents no solution
- * * align->grain_size == 0 represents a single solution
- * (align->offset)
- * * align->grain_size > 0 represents a set of solutions
- *
- * These are invalid:
- * * align->offset < 0 Note: this gets "normalized"
- * * align->grain_size < 0
- *
- * For the align_* operations, there must be a solution. i.e. align != NULL
- * All solutions must be greater than zero.
- */
-
- struct _PedAlignment {
- PedSector offset;
- PedSector grain_size;
- };
-
- extern PedSector ped_round_up_to (PedSector sector, PedSector grain_size);
- extern PedSector ped_round_down_to (PedSector sector, PedSector grain_size);
- extern PedSector ped_round_to_nearest (PedSector sector, PedSector grain_size);
- extern PedSector ped_greatest_common_divisor (PedSector a, PedSector b);
-
- extern int ped_alignment_init (PedAlignment* align, PedSector offset,
- PedSector grain_size);
- extern PedAlignment* ped_alignment_new (PedSector offset, PedSector grain_size);
- extern void ped_alignment_destroy (PedAlignment* align);
- extern PedAlignment* ped_alignment_duplicate (const PedAlignment* align);
- extern PedAlignment* ped_alignment_intersect (const PedAlignment* a,
- const PedAlignment* b);
-
- extern PedSector
- ped_alignment_align_up (const PedAlignment* align, const PedGeometry* geom,
- PedSector sector);
- extern PedSector
- ped_alignment_align_down (const PedAlignment* align, const PedGeometry* geom,
- PedSector sector);
- extern PedSector
- ped_alignment_align_nearest (const PedAlignment* align, const PedGeometry* geom,
- PedSector sector);
-
- extern int
- ped_alignment_is_aligned (const PedAlignment* align, const PedGeometry* geom,
- PedSector sector);
-
- extern const PedAlignment* ped_alignment_any;
- extern const PedAlignment* ped_alignment_none;
-
- static inline PedSector
- ped_div_round_up (PedSector numerator, PedSector divisor)
- {
- return (numerator + divisor - 1) / divisor;
- }
-
- static inline PedSector
- ped_div_round_to_nearest (PedSector numerator, PedSector divisor)
- {
- return (numerator + divisor/2) / divisor;
- }
-
- #endif /* PED_NATMATH_H_INCLUDED */
-
-