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/*
/usr/src/ext2ed/inodebitmap_com.c
A part of the extended file system 2 disk editor.
-------------------------
Handles the inode bitmap.
-------------------------
Please refer to the documentation in blockbitmap_com.c - Those two files are almost equal.
First written on: July 25 1995
Copyright (C) 1995 Gadi Oxman
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ext2ed.h"
void type_ext2_inode_bitmap___entry (char *command_line)
{
unsigned long entry_num;
char *ptr,buffer [80];
ptr=parse_word (command_line,buffer);
if (*ptr==0) {
wprintw (command_win,"Error - No argument specified\n");refresh_command_win ();return;
}
ptr=parse_word (ptr,buffer);
entry_num=atol (buffer);
if (entry_num >= file_system_info.super_block.s_inodes_per_group) {
wprintw (command_win,"Error - Entry number out of bounds\n");refresh_command_win ();return;
}
inode_bitmap_info.entry_num=entry_num;
strcpy (buffer,"show");dispatch (buffer);
}
void type_ext2_inode_bitmap___next (char *command_line)
{
long entry_offset=1;
char *ptr,buffer [80];
ptr=parse_word (command_line,buffer);
if (*ptr!=0) {
ptr=parse_word (ptr,buffer);
entry_offset=atol (buffer);
}
sprintf (buffer,"entry %ld",inode_bitmap_info.entry_num+entry_offset);
dispatch (buffer);
}
void type_ext2_inode_bitmap___prev (char *command_line)
{
long entry_offset=1;
char *ptr,buffer [80];
ptr=parse_word (command_line,buffer);
if (*ptr!=0) {
ptr=parse_word (ptr,buffer);
entry_offset=atol (buffer);
}
sprintf (buffer,"entry %ld",inode_bitmap_info.entry_num-entry_offset);
dispatch (buffer);
}
void type_ext2_inode_bitmap___allocate (char *command_line)
{
long entry_num,num=1;
char *ptr,buffer [80];
ptr=parse_word (command_line,buffer);
if (*ptr!=0) {
ptr=parse_word (ptr,buffer);
num=atol (buffer);
}
entry_num=inode_bitmap_info.entry_num;
if (num > file_system_info.super_block.s_inodes_per_group-entry_num) {
wprintw (command_win,"Error - There aren't that much inodes in the group\n");
refresh_command_win ();return;
}
while (num) {
allocate_inode (entry_num);
num--;entry_num++;
}
dispatch ("show");
}
void type_ext2_inode_bitmap___deallocate (char *command_line)
{
long entry_num,num=1;
char *ptr,buffer [80];
ptr=parse_word (command_line,buffer);
if (*ptr!=0) {
ptr=parse_word (ptr,buffer);
num=atol (buffer);
}
entry_num=inode_bitmap_info.entry_num;
if (num > file_system_info.super_block.s_inodes_per_group-entry_num) {
wprintw (command_win,"Error - There aren't that much inodes in the group\n");
refresh_command_win ();return;
}
while (num) {
deallocate_inode (entry_num);
num--;entry_num++;
}
dispatch ("show");
}
void allocate_inode (long entry_num)
{
unsigned char bit_mask=1;
int byte_offset,j;
byte_offset=entry_num/8;
for (j=0;j<entry_num%8;j++)
bit_mask*=2;
type_data.u.buffer [byte_offset] |= bit_mask;
}
void deallocate_inode (long entry_num)
{
unsigned char bit_mask=1;
int byte_offset,j;
byte_offset=entry_num/8;
for (j=0;j<entry_num%8;j++)
bit_mask*=2;
bit_mask^=0xff;
type_data.u.buffer [byte_offset] &= bit_mask;
}
void type_ext2_inode_bitmap___show (char *command_line)
{
int i,j;
unsigned char *ptr;
unsigned long inode_num,entry_num;
ptr=type_data.u.buffer;
show_pad_info.line=0;show_pad_info.max_line=-1;
wmove (show_pad,0,0);
for (i=0,entry_num=0;i<file_system_info.super_block.s_inodes_per_group/8;i++,ptr++) {
for (j=1;j<=128;j*=2) {
if (entry_num==inode_bitmap_info.entry_num) {
wattrset (show_pad,A_REVERSE);
show_pad_info.line=show_pad_info.max_line-show_pad_info.display_lines/2;
}
if ((*ptr) & j)
wprintw (show_pad,"1");
else
wprintw (show_pad,"0");
if (entry_num==inode_bitmap_info.entry_num)
wattrset (show_pad,A_NORMAL);
entry_num++;
}
wprintw (show_pad," ");
if (i%8==7) {
wprintw (show_pad,"\n");
show_pad_info.max_line++;
}
}
if (i%8!=7) {
wprintw (show_pad,"\n");
show_pad_info.max_line++;
}
refresh_show_pad ();
show_info ();
wmove (show_win,1,0);wprintw (show_win,"Inode bitmap of block group %ld\n",inode_bitmap_info.group_num);
inode_num=1+inode_bitmap_info.entry_num+inode_bitmap_info.group_num*file_system_info.super_block.s_inodes_per_group;
wprintw (show_win,"Status of inode %ld - ",inode_num);
ptr=type_data.u.buffer+inode_bitmap_info.entry_num/8;
j=1;
for (i=inode_bitmap_info.entry_num % 8;i>0;i--)
j*=2;
if ((*ptr) & j)
wprintw (show_win,"Allocated\n");
else
wprintw (show_win,"Free\n");
refresh_show_win ();
}
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