// parttypes.cc
// Class to manage partition type codes -- a slight variant on MBR type
// codes, GUID type codes, and associated names.

/* This program is copyright (c) 2009-2015 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 "parttypes.h"

using namespace std;

int PartType::numInstances = 0;
AType* PartType::allTypes = NULL;
AType* PartType::lastType = NULL;

// Constructor. Its main task is to initialize the data list, but only
// if this is the first instance, since it's a static linked list.
// Partition type codes are MBR type codes multiplied by 0x0100, with
// additional related codes taking on following numbers. For instance,
// the FreeBSD disklabel code in MBR is 0xa5; here, it's 0xa500, with
// additional FreeBSD codes being 0xa501, 0xa502, and so on. This gives
// related codes similar numbers and (given appropriate entry positions
// in the linked list) keeps them together in the listings generated
// by typing "L" at the main gdisk menu.
PartType::PartType(void) : GUIDData() {
   numInstances++;
   if (numInstances == 1) {
      AddAllTypes();
   } // if
} // default constructor

PartType::PartType(const PartType & orig) : GUIDData(orig) {
   numInstances++;
   if (numInstances == 1) { // should never happen; just being paranoid
      AddAllTypes();
   } // if
} // PartType copy constructor

PartType::PartType(const GUIDData & orig) : GUIDData(orig) {
   numInstances++;
   if (numInstances == 1) {
      AddAllTypes();
   } // if
} // PartType copy constructor

PartType::~PartType(void) {
   AType* tempType;

   numInstances--;
   if (numInstances == 0) {
      while (allTypes != NULL) {
         tempType = allTypes;
         allTypes = allTypes->next;
         delete tempType;
      } // while
   } // if
} // destructor

// Add all partition type codes to the internal linked-list structure.
// Used by constructors.
// See http://www.win.tue.nl/~aeb/partitions/partition_types-1.html
// for a list of MBR partition type codes.
void PartType::AddAllTypes(void) {
   // Start with the "unused entry," which should normally appear only
   // on empty partition table entries....
   AddType(0x0000, "00000000-0000-0000-0000-000000000000", "Unused entry", 0);

   // DOS/Windows partition types, most of which are hidden from the "L" listing
   // (they're available mainly for MBR-to-GPT conversions).
   AddType(0x0100, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // FAT-12
   AddType(0x0400, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // FAT-16 < 32M
   AddType(0x0600, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // FAT-16
   AddType(0x0700, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 1); // NTFS (or HPFS)
   AddType(0x0b00, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // FAT-32
   AddType(0x0c00, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // FAT-32 LBA
   AddType(0x0c01, "E3C9E316-0B5C-4DB8-817D-F92DF00215AE", "Microsoft reserved");
   AddType(0x0e00, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // FAT-16 LBA
   AddType(0x1100, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden FAT-12
   AddType(0x1400, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden FAT-16 < 32M
   AddType(0x1600, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden FAT-16
   AddType(0x1700, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden NTFS (or HPFS)
   AddType(0x1b00, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden FAT-32
   AddType(0x1c00, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden FAT-32 LBA
   AddType(0x1e00, "EBD0A0A2-B9E5-4433-87C0-68B6B72699C7", "Microsoft basic data", 0); // Hidden FAT-16 LBA
   AddType(0x2700, "DE94BBA4-06D1-4D40-A16A-BFD50179D6AC", "Windows RE");

   // Open Network Install Environment (ONIE) specific types.
   // See http://www.onie.org/ and
   // https://github.com/opencomputeproject/onie/blob/master/patches/gptfdisk/add-onie-partition-types.patch
   AddType(0x3000, "7412F7D5-A156-4B13-81DC-867174929325", "ONIE boot");
   AddType(0x3001, "D4E6E2CD-4469-46F3-B5CB-1BFF57AFC149", "ONIE config");

   // Plan 9; see http://man.cat-v.org/9front/8/prep
   AddType(0x3900, "C91818F9-8025-47AF-89D2-F030D7000C2C", "Plan 9");

   // PowerPC reference platform boot partition
   AddType(0x4100, "9E1A2D38-C612-4316-AA26-8B49521E5A8B", "PowerPC PReP boot");

   // Windows LDM ("dynamic disk") types
   AddType(0x4200, "AF9B60A0-1431-4F62-BC68-3311714A69AD", "Windows LDM data"); // Logical disk manager
   AddType(0x4201, "5808C8AA-7E8F-42E0-85D2-E1E90434CFB3", "Windows LDM metadata"); // Logical disk manager
   AddType(0x4202, "E75CAF8F-F680-4CEE-AFA3-B001E56EFC2D", "Windows Storage Spaces"); // A newer LDM-type setup

   // An oddball IBM filesystem....
   AddType(0x7501, "37AFFC90-EF7D-4E96-91C3-2D7AE055B174", "IBM GPFS"); // General Parallel File System (GPFS)

   // ChromeOS-specific partition types...
   // Values taken from vboot_reference/firmware/lib/cgptlib/include/gpt.h in
   // ChromeOS source code, retrieved 12/23/2010. They're also at
   // http://www.chromium.org/chromium-os/chromiumos-design-docs/disk-format.
   // These have no MBR equivalents, AFAIK, so I'm using 0x7Fxx values, since they're close
   // to the Linux values.
   AddType(0x7f00, "FE3A2A5D-4F32-41A7-B725-ACCC3285A309", "ChromeOS kernel");
   AddType(0x7f01, "3CB8E202-3B7E-47DD-8A3C-7FF2A13CFCEC", "ChromeOS root");
   AddType(0x7f02, "2E0A753D-9E48-43B0-8337-B15192CB1B5E", "ChromeOS reserved");

   // Linux-specific partition types....
   AddType(0x8200, "0657FD6D-A4AB-43C4-84E5-0933C84B4F4F", "Linux swap"); // Linux swap (or Solaris on MBR)
   AddType(0x8300, "0FC63DAF-8483-4772-8E79-3D69D8477DE4", "Linux filesystem"); // Linux native
   AddType(0x8301, "8DA63339-0007-60C0-C436-083AC8230908", "Linux reserved");
   // See http://www.freedesktop.org/software/systemd/man/systemd-gpt-auto-generator.html
   // and http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/
   AddType(0x8302, "933AC7E1-2EB4-4F13-B844-0E14E2AEF915", "Linux /home"); // Linux /home (auto-mounted by systemd)
   AddType(0x8303, "44479540-F297-41B2-9AF7-D131D5F0458A", "Linux x86 root (/)"); // Linux / on x86 (auto-mounted by systemd)
   AddType(0x8304, "4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709", "Linux x86-64 root (/)"); // Linux / on x86-64 (auto-mounted by systemd)
   AddType(0x8305, "B921B045-1DF0-41C3-AF44-4C6F280D3FAE", "Linux ARM64 root (/)"); // Linux / on 64-bit ARM (auto-mounted by systemd)
   AddType(0x8306, "3B8F8425-20E0-4F3B-907F-1A25A76F98E8", "Linux /srv"); // Linux /srv (auto-mounted by systemd)
   AddType(0x8307, "69DAD710-2CE4-4E3C-B16C-21A1D49ABED3", "Linux ARM32 root (/)"); // Linux / on 32-bit ARM (auto-mounted by systemd)

   // Used by Intel Rapid Start technology
   AddType(0x8400, "D3BFE2DE-3DAF-11DF-BA40-E3A556D89593", "Intel Rapid Start");

   // Another Linux type code....
   AddType(0x8e00, "E6D6D379-F507-44C2-A23C-238F2A3DF928", "Linux LVM");

   // Android type codes....
   AddType(0xa000, "2568845D-2332-4675-BC39-8FA5A4748D15", "Android bootloader");
   AddType(0xa001, "114EAFFE-1552-4022-B26E-9B053604CF84", "Android bootloader 2");
   AddType(0xa002, "49A4D17F-93A3-45C1-A0DE-F50B2EBE2599", "Android boot");
   AddType(0xa003, "4177C722-9E92-4AAB-8644-43502BFD5506", "Android recovery");
   AddType(0xa004, "EF32A33B-A409-486C-9141-9FFB711F6266", "Android misc");
   AddType(0xa005, "20AC26BE-20B7-11E3-84C5-6CFDB94711E9", "Android metadata");
   AddType(0xa006, "38F428E6-D326-425D-9140-6E0EA133647C", "Android system");
   AddType(0xa007, "A893EF21-E428-470A-9E55-0668FD91A2D9", "Android cache");
   AddType(0xa008, "DC76DDA9-5AC1-491C-AF42-A82591580C0D", "Android data");
   AddType(0xa009, "EBC597D0-2053-4B15-8B64-E0AAC75F4DB1", "Android persistent");
   AddType(0xa00a, "8F68CC74-C5E5-48DA-BE91-A0C8C15E9C80", "Android factory");
   AddType(0xa00b, "767941D0-2085-11E3-AD3B-6CFDB94711E9", "Android fastboot/tertiary");
   AddType(0xa00c, "AC6D7924-EB71-4DF8-B48D-E267B27148FF", "Android OEM");

   // FreeBSD partition types....
   // Note: Rather than extract FreeBSD disklabel data, convert FreeBSD
   // partitions in-place, and let FreeBSD sort out the details....
   AddType(0xa500, "516E7CB4-6ECF-11D6-8FF8-00022D09712B", "FreeBSD disklabel");
   AddType(0xa501, "83BD6B9D-7F41-11DC-BE0B-001560B84F0F", "FreeBSD boot");
   AddType(0xa502, "516E7CB5-6ECF-11D6-8FF8-00022D09712B", "FreeBSD swap");
   AddType(0xa503, "516E7CB6-6ECF-11D6-8FF8-00022D09712B", "FreeBSD UFS");
   AddType(0xa504, "516E7CBA-6ECF-11D6-8FF8-00022D09712B", "FreeBSD ZFS");
   AddType(0xa505, "516E7CB8-6ECF-11D6-8FF8-00022D09712B", "FreeBSD Vinum/RAID");

   // Midnight BSD partition types....
   AddType(0xa580, "85D5E45A-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD data");
   AddType(0xa581, "85D5E45E-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD boot");
   AddType(0xa582, "85D5E45B-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD swap");
   AddType(0xa583, "0394Ef8B-237E-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD UFS");
   AddType(0xa584, "85D5E45D-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD ZFS");
   AddType(0xa585, "85D5E45C-237C-11E1-B4B3-E89A8F7FC3A7", "Midnight BSD Vinum");

   // OpenBSD partition type....
   AddType(0xa600, "824CC7A0-36A8-11E3-890A-952519AD3F61", "OpenBSD disklabel");

   // A MacOS partition type, separated from others by NetBSD partition types...
   AddType(0xa800, "55465300-0000-11AA-AA11-00306543ECAC", "Apple UFS"); // Mac OS X

   // NetBSD partition types. Note that the main entry sets it up as a
   // FreeBSD disklabel. I'm not 100% certain this is the correct behavior.
   AddType(0xa900, "516E7CB4-6ECF-11D6-8FF8-00022D09712B", "FreeBSD disklabel", 0); // NetBSD disklabel
   AddType(0xa901, "49F48D32-B10E-11DC-B99B-0019D1879648", "NetBSD swap");
   AddType(0xa902, "49F48D5A-B10E-11DC-B99B-0019D1879648", "NetBSD FFS");
   AddType(0xa903, "49F48D82-B10E-11DC-B99B-0019D1879648", "NetBSD LFS");
   AddType(0xa904, "2DB519C4-B10F-11DC-B99B-0019D1879648", "NetBSD concatenated");
   AddType(0xa905, "2DB519EC-B10F-11DC-B99B-0019D1879648", "NetBSD encrypted");
   AddType(0xa906, "49F48DAA-B10E-11DC-B99B-0019D1879648", "NetBSD RAID");

   // Mac OS partition types (See also 0xa800, above)....
   AddType(0xab00, "426F6F74-0000-11AA-AA11-00306543ECAC", "Recovery HD");
   AddType(0xaf00, "48465300-0000-11AA-AA11-00306543ECAC", "Apple HFS/HFS+");
   AddType(0xaf01, "52414944-0000-11AA-AA11-00306543ECAC", "Apple RAID");
   AddType(0xaf02, "52414944-5F4F-11AA-AA11-00306543ECAC", "Apple RAID offline");
   AddType(0xaf03, "4C616265-6C00-11AA-AA11-00306543ECAC", "Apple label");
   AddType(0xaf04, "5265636F-7665-11AA-AA11-00306543ECAC", "AppleTV recovery");
   AddType(0xaf05, "53746F72-6167-11AA-AA11-00306543ECAC", "Apple Core Storage");
   AddType(0xaf06, "B6FA30DA-92D2-4A9A-96F1-871EC6486200", "Apple SoftRAID Status");
   AddType(0xaf07, "2E313465-19B9-463F-8126-8A7993773801", "Apple SoftRAID Scratch");
   AddType(0xaf08, "FA709C7E-65B1-4593-BFD5-E71D61DE9B02", "Apple SoftRAID Volume");
   AddType(0xaf09, "BBBA6DF5-F46F-4A89-8F59-8765B2727503", "Apple SoftRAID Cache");

   // QNX Power-Safe (QNX6)
   AddType(0xb300, "CEF5A9AD-73BC-4601-89F3-CDEEEEE321A1", "QNX6 Power-Safe");

   // Acronis Secure Zone
   AddType(0xbc00, "0311FC50-01CA-4725-AD77-9ADBB20ACE98", "Acronis Secure Zone");

   // Solaris partition types (one of which is shared with MacOS)
   AddType(0xbe00, "6A82CB45-1DD2-11B2-99A6-080020736631", "Solaris boot");
   AddType(0xbf00, "6A85CF4D-1DD2-11B2-99A6-080020736631", "Solaris root");
   AddType(0xbf01, "6A898CC3-1DD2-11B2-99A6-080020736631", "Solaris /usr & Mac ZFS"); // Solaris/MacOS
   AddType(0xbf02, "6A87C46F-1DD2-11B2-99A6-080020736631", "Solaris swap");
   AddType(0xbf03, "6A8B642B-1DD2-11B2-99A6-080020736631", "Solaris backup");
   AddType(0xbf04, "6A8EF2E9-1DD2-11B2-99A6-080020736631", "Solaris /var");
   AddType(0xbf05, "6A90BA39-1DD2-11B2-99A6-080020736631", "Solaris /home");
   AddType(0xbf06, "6A9283A5-1DD2-11B2-99A6-080020736631", "Solaris alternate sector");
   AddType(0xbf07, "6A945A3B-1DD2-11B2-99A6-080020736631", "Solaris Reserved 1");
   AddType(0xbf08, "6A9630D1-1DD2-11B2-99A6-080020736631", "Solaris Reserved 2");
   AddType(0xbf09, "6A980767-1DD2-11B2-99A6-080020736631", "Solaris Reserved 3");
   AddType(0xbf0a, "6A96237F-1DD2-11B2-99A6-080020736631", "Solaris Reserved 4");
   AddType(0xbf0b, "6A8D2AC7-1DD2-11B2-99A6-080020736631", "Solaris Reserved 5");

   // I can find no MBR equivalents for these, but they're on the
   // Wikipedia page for GPT, so here we go....
   AddType(0xc001, "75894C1E-3AEB-11D3-B7C1-7B03A0000000", "HP-UX data");
   AddType(0xc002, "E2A1E728-32E3-11D6-A682-7B03A0000000", "HP-UX service");

   // Open Network Install Environment (ONIE) partitions....
   AddType(0xe100, "7412F7D5-A156-4B13-81DC-867174929325", "ONIE boot");
   AddType(0xe101, "D4E6E2CD-4469-46F3-B5CB-1BFF57AFC149", "ONIE config");

   // See http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec
   AddType(0xea00, "BC13C2FF-59E6-4262-A352-B275FD6F7172", "Freedesktop $BOOT");

   // Type code for Haiku; uses BeOS MBR code as hex code base
   AddType(0xeb00, "42465331-3BA3-10F1-802A-4861696B7521", "Haiku BFS");

   // Manufacturer-specific ESP-like partitions (in order in which they were added)
   AddType(0xed00, "F4019732-066E-4E12-8273-346C5641494F", "Sony system partition");
   AddType(0xed01, "BFBFAFE7-A34F-448A-9A5B-6213EB736C22", "Lenovo system partition");

   // EFI system and related partitions
   AddType(0xef00, "C12A7328-F81F-11D2-BA4B-00A0C93EC93B", "EFI System"); // Parted identifies these as having the "boot flag" set
   AddType(0xef01, "024DEE41-33E7-11D3-9D69-0008C781F39F", "MBR partition scheme"); // Used to nest MBR in GPT
   AddType(0xef02, "21686148-6449-6E6F-744E-656564454649", "BIOS boot partition"); // Used by GRUB

   // Ceph type codes; see https://github.com/ceph/ceph/blob/9bcc42a3e6b08521694b5c0228b2c6ed7b3d312e/src/ceph-disk#L76-L81
   AddType(0xf800, "4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D", "Ceph OSD"); // Ceph Object Storage Daemon
   AddType(0xf801, "4FBD7E29-9D25-41B8-AFD0-5EC00CEFF05D", "Ceph dm-crypt OSD"); // Ceph Object Storage Daemon (encrypted)
   AddType(0xf802, "45B0969E-9B03-4F30-B4C6-B4B80CEFF106", "Ceph journal");
   AddType(0xf803, "45B0969E-9B03-4F30-B4C6-5EC00CEFF106", "Ceph dm-crypt journal");
   AddType(0xf804, "89C57F98-2FE5-4DC0-89C1-F3AD0CEFF2BE", "Ceph disk in creation");
   AddType(0xf805, "89C57F98-2FE5-4DC0-89C1-5EC00CEFF2BE", "Ceph dm-crypt disk in creation");

   // VMWare ESX partition types codes
   AddType(0xfb00, "AA31E02A-400F-11DB-9590-000C2911D1B8", "VMWare VMFS");
   AddType(0xfb01, "9198EFFC-31C0-11DB-8F78-000C2911D1B8", "VMWare reserved");
   AddType(0xfc00, "9D275380-40AD-11DB-BF97-000C2911D1B8", "VMWare kcore crash protection");

   // A straggler Linux partition type....
   AddType(0xfd00, "A19D880F-05FC-4D3B-A006-743F0F84911E", "Linux RAID");

   // Note: DO NOT use the 0xffff code; that's reserved to indicate an
   // unknown GUID type code.
} // PartType::AddAllTypes()

// Add a single type to the linked list of types. Returns 1 if operation
// succeeds, 0 otherwise.
int PartType::AddType(uint16_t mbrType, const char * guidData, const char * name,
                      int toDisplay) {
   AType* tempType;
   int allOK = 1;

   tempType = new AType;
   if (tempType != NULL) {
      tempType->MBRType = mbrType;
      tempType->GUIDType = guidData;
      tempType->name = name;
      tempType->display = toDisplay;
      tempType->next = NULL;
      if (allTypes == NULL) { // first entry
         allTypes = tempType;
      } else {
         lastType->next = tempType;
      } // if/else
      lastType = tempType;
   } else {
      cerr << "Unable to allocate memory in PartType::AddType()! Partition type list will\n";
      cerr << "be incomplete!\n";
      allOK = 0;
   } // if/else
   return allOK;
} // GUID::AddType(const char* variant)

// Assignment operator by string. If the original string is short,
// interpret it as a gdisk hex code; if it's longer, interpret it as
// a direct entry of a GUID value. If a short string isn't a hex
// number, do nothing.
PartType & PartType::operator=(const string & orig) {
   uint32_t hexCode;

   if (orig.length() < 32) {
      if (IsHex(orig)) {
         sscanf(orig.c_str(), "%x", &hexCode);
         *this = hexCode;
      }
   } else {
      GUIDData::operator=(orig);
   } // if/else hexCode or GUID
   return *this;
} // PartType::operator=(const char * orig)

// Assignment from C-style string; rely on C++ casting....
PartType & PartType::operator=(const char * orig) {
   return operator=((string) orig);
} // PartType::operator=(const char * orig)

// Assign a GUID based on my custom 2-byte (16-bit) MBR hex ID variant
PartType & PartType::operator=(uint16_t ID) {
   AType* theItem = allTypes;
   int found = 0;

   // Now search the type list for a match to the ID....
   while ((theItem != NULL) && (!found)) {
      if (theItem->MBRType == ID)  {
         GUIDData::operator=(theItem->GUIDType);
         found = 1;
      } else {
         theItem = theItem->next;
      } // if/else
   } // while
   if (!found) {
      // Assign a default value....
      operator=(DEFAULT_GPT_TYPE);
      cout.setf(ios::uppercase);
      cout.fill('0');
      cout << "Exact type match not found for type code ";
      cout.width(4);
      cout << hex << ID << "; assigning type code for\n'" << TypeName() << "'\n" << dec;
      cout.fill(' ');
   } // if (!found)
   return *this;
} // PartType::operator=(uint16_t ID)

// Return the English description of the partition type (e.g., "Linux filesystem")
string PartType::TypeName(void) const {
   AType* theItem = allTypes;
   int found = 0;
   string typeName;

   while ((theItem != NULL) && (!found)) {
      if (theItem->GUIDType == *this) { // found it!
         typeName = theItem->name;
         found = 1;
      } else {
         theItem = theItem->next;
      } // if/else
   } // while
   if (!found) {
      typeName = "Unknown";
   } // if (!found)
   return typeName;
} // PartType::TypeName()

#ifdef USE_UTF16
// Return the Unicode description of the partition type (e.g., "Linux filesystem")
UnicodeString PartType::UTypeName(void) const {
   AType* theItem = allTypes;
   int found = 0;
   UnicodeString typeName;

   while ((theItem != NULL) && (!found)) {
      if (theItem->GUIDType == *this) { // found it!
         typeName = theItem->name.c_str();
         found = 1;
      } else {
         theItem = theItem->next;
      } // if/else
   } // while
   if (!found) {
      typeName = "Unknown";
   } // if (!found)
   return typeName;
} // PartType::TypeName()
#endif

// Return the custom GPT fdisk 2-byte (16-bit) hex code for this GUID partition type
// Note that this function ignores entries for which the display variable
// is set to 0. This enables control of which values get returned when
// there are multiple possibilities, but opens the algorithm up to the
// potential for problems should the data in the list be bad.
uint16_t PartType::GetHexType() const {
   AType* theItem = allTypes;
   int found = 0;
   uint16_t theID = 0xFFFF;

   while ((theItem != NULL) && (!found)) {
      if ((theItem->GUIDType == *this) && (theItem->display == 1)) { // found it!
         theID = theItem->MBRType;
         found = 1;
      } else {
         theItem = theItem->next;
      } // if/else
   } // while
   if (!found) {
      theID = 0xFFFF;
   } // if (!found)
   return theID;
} // PartType::GetHex()

// Displays the available types and my extended MBR codes for same....
// Note: This function assumes an 80-column display. On wider displays,
// it stops at under 80 columns; on narrower displays, lines will wrap
// in an ugly way. The maxLines value is the maximum number of lines
// to display before prompting to continue, or 0 (or a negative value)
// for no limit.
void PartType::ShowAllTypes(int maxLines) const {
   int colCount = 1, lineCount = 1;
   size_t i;
   AType* thisType = allTypes;
   string line;

   cout.unsetf(ios::uppercase);
   while (thisType != NULL) {
      if (thisType->display == 1) { // show it
         cout.fill('0');
         cout.width(4);
         cout << hex << thisType->MBRType << " ";
         cout << thisType->name.substr(0, 20);
         for (i = 0; i < (20 - (thisType->name.substr(0, 20).length())); i++)
            cout << " ";
         if ((colCount % 3) == 0) {
            if (thisType->next) {
               cout << "\n";
               if ((maxLines > 0) && (lineCount++ % maxLines) == 0) {
                  cout << "Press the <Enter> key to see more codes: ";
                  getline(cin, line);
               } // if reached screen line limit
            } // if there's another entry following this one
         } else {
            cout << "  ";
         }
         colCount++;
      } // if
      thisType = thisType->next;
   } // while
   cout.fill(' ');
   cout << "\n" << dec;
} // PartType::ShowAllTypes(int maxLines)

// Returns 1 if code is a valid extended MBR code, 0 if it's not
int PartType::Valid(uint16_t code) const {
   AType* thisType = allTypes;
   int found = 0;

   while ((thisType != NULL) && (!found)) {
      if (thisType->MBRType == code) {
         found = 1;
      } // if
      thisType = thisType->next;
   } // while
   return found;
} // PartType::Valid()
