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  1. /* 
  2.     FIPS - the First nondestructive Interactive Partition Splitting program 
  3.  
  4.     Module calculat.cpp 
  5.  
  6.     RCS - Header: 
  7.     $Header: c:/daten/fips/source/main/RCS/calculat.cpp 1.1 1994/05/25 22:19:33 schaefer Exp schaefer $ 
  8.  
  9.     Copyright (C) 1993 Arno Schaefer 
  10.  
  11.     This program is free software; you can redistribute it and/or modify 
  12.     it under the terms of the GNU General Public License as published by 
  13.     the Free Software Foundation; either version 2 of the License, or 
  14.     (at your option) any later version. 
  15.  
  16.     This program is distributed in the hope that it will be useful, 
  17.     but WITHOUT ANY WARRANTY; without even the implied warranty of 
  18.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
  19.     GNU General Public License for more details. 
  20.  
  21.     You should have received a copy of the GNU General Public License 
  22.     along with this program; if not, write to the Free Software 
  23.     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
  24.  
  25.  
  26.     Report problems and direct all questions to: 
  27.  
  28.     schaefer@rbg.informatik.th-darmstadt.de 
  29. */ 
  30.  
  31. #include "hdstruct.h" 
  32. #include "fipsspec.h" 
  33.  
  34. /* ----------------------------------------------------------------------- */ 
  35. /* Some calculations                                                       */ 
  36. /* ----------------------------------------------------------------------- */ 
  37.  
  38. void fips_partition_table::calculate_new_root (dword new_start_cylinder,partition *partition,const drive_geometry &geometry) 
  39. { 
  40.     struct partition_info tmppart; 
  41.  
  42.     for (int i=0;i<3;i++) if (!partition_info[i].system) 
  43.     { 
  44.         for (int j=i+1;j<4;j++) if ((partition_info[j].system == 1) || (partition_info[j].system == 4) || (partition_info[j].system == 6)) 
  45.         { 
  46.             tmppart = partition_info[i]; 
  47.             partition_info[i] = partition_info[j]; 
  48.             partition_info[j] = tmppart; 
  49.             if (partition->number == j) partition->number = i; 
  50.             break; 
  51.         } 
  52.     } 
  53.     int partition_no = partition->number; 
  54.     partition->partition_info = &partition_info[partition_no]; 
  55.  
  56.     for (i=0;i<4;i++) if (!partition_info[i].system) break; 
  57.  
  58.     partition_info[i].bootable = 0; 
  59.     partition_info[i].end_sector = partition_info[partition_no].end_sector; 
  60.     partition_info[i].end_head = partition_info[partition_no].end_head; 
  61.     partition_info[i].end_cylinder = partition_info[partition_no].end_cylinder; 
  62.     partition_info[i].start_sector = 1; 
  63.     partition_info[i].start_head = 0; 
  64.     partition_info[i].start_cylinder = new_start_cylinder; 
  65.     partition_info[i].start_sector_abs = new_start_cylinder * geometry.heads * geometry.sectors; 
  66.     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; 
  67.  
  68.     if ((partition_info[i].no_of_sectors_abs > 0xffff) || (partition_info[i].start_sector_abs > 0xffff)) partition_info[i].system = 6; 
  69.         else if (partition_info[i].no_of_sectors_abs >= 20740) partition_info[i].system = 4; 
  70.         else partition_info[i].system = 1; 
  71.  
  72.     partition_info[partition_no].end_head = geometry.heads - 1; 
  73.     partition_info[partition_no].end_sector = geometry.sectors; 
  74.     partition_info[partition_no].end_cylinder = new_start_cylinder - 1; 
  75.     partition_info[partition_no].no_of_sectors_abs = partition_info[i].start_sector_abs - partition_info[partition_no].start_sector_abs; 
  76.     if ((partition_info[partition_no].no_of_sectors_abs > 0xffff) || (partition_info[partition_no].start_sector_abs > 0xffff)) partition_info[partition_no].system = 6; 
  77.     else partition_info[partition_no].system = 4; 
  78. } 
  79.  
  80.  
  81. void fips_bpb::calculate_new_boot (const partition_info &partition_info) 
  82. { 
  83.     if ((partition_info.no_of_sectors_abs > 0xffff) || (partition_info.start_sector_abs > 0xffff)) 
  84.     { 
  85.         no_of_sectors = 0; 
  86.         no_of_sectors_long = partition_info.no_of_sectors_abs; 
  87.     } 
  88.     else 
  89.     { 
  90.         no_of_sectors_long = 0; 
  91.         no_of_sectors = partition_info.no_of_sectors_abs; 
  92.     } 
  93. } 
  94.  
  95.