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// attributes.cc
// Class to manage partition attribute codes. These are binary bit fields,
// of which only three are currently (2/2009) documented on Wikipedia.
/* This program is copyright (c) 2009 by Roderick W. Smith. It is distributed
under the terms of the GNU GPL version 2, as detailed in the COPYING file. */
#define __STDC_LIMIT_MACROS
#define __STDC_CONSTANT_MACROS
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <iostream>
#include <sstream>
#include "attributes.h"
using namespace std;
// Constructor. Its main task is to initialize the attribute name
// data.
Attributes::Attributes(void) {
int i;
ostringstream temp;
// Most bits are undefined, so start by giving them an
// appropriate name
for (i = 1; i < NUM_ATR; i++) {
temp << "Undefined bit #" << i;
atNames[i] = temp.str();
} // for
// Now reset those names that are defined....
atNames[0] = "system partition"; // required for computer to operate
atNames[60] = "read-only";
atNames[62] = "hidden";
atNames[63] = "do not automount";
} // Attributes constructor
// Destructor.
Attributes::~Attributes(void) {
} // Attributes destructor
// Display current attributes to user
void Attributes::DisplayAttributes(void) {
int i;
cout << "Attribute value is ";
cout.setf(ios::uppercase);
cout.fill('0');
cout.width(16);
cout << hex << attributes << dec << ". Set fields are:\n";
for (i = 0; i < NUM_ATR; i++) {
if (((attributes >> i) % 2) == 1) { // bit is set
if (atNames[NUM_ATR - i - 1].substr(0, 9) != "Undefined")
cout << atNames[NUM_ATR - i - 1] << "\n";
} // if
} // for
cout.fill(' ');
} // Attributes::DisplayAttributes()
// Prompt user for attribute changes
void Attributes::ChangeAttributes(void) {
int response, i;
uint64_t bitValue;
cout << "Known attributes are:\n";
for (i = 0; i < NUM_ATR; i++) {
if (atNames[i].substr(0, 9) != "Undefined")
cout << i << " - " << atNames[i] << "\n";
} // for
do {
response = GetNumber(0, 64, -1, (string) "Toggle which attribute field (0-63, 64 to exit): ");
if (response != 64) {
bitValue = PowerOf2(NUM_ATR - response - 1); // Find the integer value of the bit
if ((bitValue & attributes) == bitValue) { // bit is set
attributes -= bitValue; // so unset it
cout << "Have disabled the '" << atNames[response] << "' attribute.\n";
} else { // bit is not set
attributes += bitValue; // so set it
cout << "Have enabled the '" << atNames[response] << "' attribute.\n";
} // if/else
} // if
} while (response != 64);
} // Attributes::ChangeAttributes()
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