/* 
	FIPS - the First nondestructive Interactive Partition Splitting program 
 
	Module calculat.cpp 
 
	RCS - Header: 
	$Header: c:/daten/fips/source/main/RCS/calculat.cpp 1.1 1994/05/25 22:19:33 schaefer Exp schaefer $ 
 
	Copyright (C) 1993 Arno Schaefer 
 
	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., 675 Mass Ave, Cambridge, MA 02139, USA. 
 
 
	Report problems and direct all questions to: 
 
	schaefer@rbg.informatik.th-darmstadt.de 
*/ 
 
#include "hdstruct.h" 
#include "fipsspec.h" 
 
/* ----------------------------------------------------------------------- */ 
/* Some calculations                                                       */ 
/* ----------------------------------------------------------------------- */ 
 
void fips_partition_table::calculate_new_root (dword new_start_cylinder,partition *partition,const drive_geometry &geometry) 
{ 
	struct partition_info tmppart; 
 
	for (int i=0;i<3;i++) if (!partition_info[i].system) 
	{ 
		for (int j=i+1;j<4;j++) if ((partition_info[j].system == 1) || (partition_info[j].system == 4) || (partition_info[j].system == 6)) 
		{ 
			tmppart = partition_info[i]; 
			partition_info[i] = partition_info[j]; 
			partition_info[j] = tmppart; 
			if (partition->number == j) partition->number = i; 
			break; 
		} 
	} 
	int partition_no = partition->number; 
	partition->partition_info = &partition_info[partition_no]; 
 
	for (i=0;i<4;i++) if (!partition_info[i].system) break; 
 
	partition_info[i].bootable = 0; 
	partition_info[i].end_sector = partition_info[partition_no].end_sector; 
	partition_info[i].end_head = partition_info[partition_no].end_head; 
	partition_info[i].end_cylinder = partition_info[partition_no].end_cylinder; 
	partition_info[i].start_sector = 1; 
	partition_info[i].start_head = 0; 
	partition_info[i].start_cylinder = new_start_cylinder; 
	partition_info[i].start_sector_abs = new_start_cylinder * geometry.heads * geometry.sectors; 
	partition_info[i].no_of_sectors_abs = partition_info[partition_no].start_sector_abs + partition_info[partition_no].no_of_sectors_abs - partition_info[i].start_sector_abs; 
 
	if ((partition_info[i].no_of_sectors_abs > 0xffff) || (partition_info[i].start_sector_abs > 0xffff)) partition_info[i].system = 6; 
		else if (partition_info[i].no_of_sectors_abs >= 20740) partition_info[i].system = 4; 
		else partition_info[i].system = 1; 
 
	partition_info[partition_no].end_head = geometry.heads - 1; 
	partition_info[partition_no].end_sector = geometry.sectors; 
	partition_info[partition_no].end_cylinder = new_start_cylinder - 1; 
	partition_info[partition_no].no_of_sectors_abs = partition_info[i].start_sector_abs - partition_info[partition_no].start_sector_abs; 
	if ((partition_info[partition_no].no_of_sectors_abs > 0xffff) || (partition_info[partition_no].start_sector_abs > 0xffff)) partition_info[partition_no].system = 6; 
	else partition_info[partition_no].system = 4; 
} 
 
 
void fips_bpb::calculate_new_boot (const partition_info &partition_info) 
{ 
	if ((partition_info.no_of_sectors_abs > 0xffff) || (partition_info.start_sector_abs > 0xffff)) 
	{ 
		no_of_sectors = 0; 
		no_of_sectors_long = partition_info.no_of_sectors_abs; 
	} 
	else 
	{ 
		no_of_sectors_long = 0; 
		no_of_sectors = partition_info.no_of_sectors_abs; 
	} 
}