| // 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[1] = "hide from EFI"; |
| atNames[2] = "legacy BIOS bootable"; |
| 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(uint32_t (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() |
| |