How does it work?

MagNumDB is a database that contains about 360,000 items. These items are constants, names, values all extracted from more than 9,000 header files (.h, .hxx, .hpp, .idl, etc.) provided by standard Windows and Visual Studio SDKs and WDKs.

Some values have been extracted from the very special uuid.lib file that contains the value of thousands of guids and property keys, not present anywhere else in header files. This can explain some duplicates (because names in uuid.lib are not always exactly the same as names in .h parsed files...).

It also contains around 36,0000 undocumented guids that we found ... meeeeep ...

 "C2P5"

To build this database, we have tried many existing parsers, things like CLANG or other fine tools, but they just don't suit our needs. They can't handle thousands of files that don't compile together, they can't handle some specific (or just very old) Microsoft constructs or annotations, they don't remember the stack of #define directives that led to a definition, they only give you a final AST, not a partial one, etc.

So, in the end, we have written a C/C++ parser named C2P5 (for C/CPP/PreProcessor/Parser), tailored specifically for computing constants. C2P5 is capable of preprocessing, parsing and partially evaluating all header files as if they were included in a one big virtual project (that of course, does not compile) on a 32G RAM machine. It currently supports the following preprocessor and C/C++ constructs:

  • #define preprocessor that define constants
  • #define preprocessor that define expression to compute constants
  • C and C++ constants, strings and enum definitions, and some level of pointerness
  • Special GUID constructs like DECLSPEC_UUID, DEFINE_GUIDSTRUCT, MIDL_INTERFACE, you name it
  • PROPERTYKEY constructs
  • Some IDL constructs
  • Etc.

The parser remembers dynamic preprocessor definitions (#if, #ifdef, etc.) that are conditions for constants definitions and expression computation. All parsed items are saved in the database, as well as the associated conditions. There may be more than one item corresponding to a given name, if there are differences in their associated conditions stack.

C2P5 supports the following types of constants, regardless of the way they are defined in source files:

  • integer, signed or unsigned, from 8-bit to 128-bit
  • floating point number, single (32-bit) or double (64-bit)
  • globally unique identifier, or guid, uuid, CLSID, IID, etc.
  • string, in narrow, wide, or utf-8/16/32 formats
  • character, in narrow, wide, or utf-8/16/32 formats
  • pointer, a constant cast as a pointer
  • property key, or PROPERTYKEY, or PKEY, a combination of a guid (fmtid) and a 32-bit integer (id).

 Powered by

C2P5 and this MagNumDB web site are written in C# and use a Lucene database as a full-text search engine. C2P5 uses a custom ANTLR4cs C grammar for expression parsing, not for preprocessor parsing.

 

 Frequently Asked Questions

  • Q: Can I run custom queries?
    A: Yes. You can use Lucene's query syntax. Note the Database is case insensitive. Check out the list of columns with their corresponding database column names:

    • Index: the item's index.
    • Name: the item's name, or title. For enum values, it's prefixed with the enum's name.
      Corresponding database field: title.
    • Type: the item's type, expressed in a specific, universal system.
      Corresponding database's field: valuetype, but use the value of the Storage type column for queries on items type.
    • Value: the item's value. For string values, it's displayed as is w/o quotes nor escaping.
      Corresponding database field: value. There is also a typedvalue field that can contain database's Int32, Int64, Float, Double or String typed values.
    • Hex Value: the item's hexadecimal value, only valid for integer types.
      There is no corresponding database field.
    • Signed Value: the item's signed value, only valid for integer and double types. Useful when you found a unsigned number and want to get the corresponding signed value (uint -> int for example).
      There is no corresponding database field.
    • Source lines(s): the source lines from which the item was extracted. Comments and characters such as TAB, CR are preserved.
      Corresponding database field: source.
    • File path: the file path from which the item was extracted, terminated by the line index.
      Corresponding database field: filepath. There are also directory and filename fields. filename is useful to query for values in a given file.
    • Score: Database's score value. Items are returned sorted by score.
    • Guid formats: a utility columns that proposes all possible guid formats. Only valid for guid types.
      There is no corresponding database field
    • Char type: the character encoding (narrow, wide, etc.). Only valid for char and string values.
      Corresponding database field: chartype.
    • Storage type: the exact storage type in the database. Only used for specific queries.
      Corresponding database field: valuetype.
    • Conditions: the list of preprocessor conditions for a given item. If a condition is surrounded with a REVERSE function, it means the reverse condition of what's surrounded was the condition.
      Corresponding database field: conditions. There may be multiple conditions fields for one item.

    Some important points to note:

    • If you search for a negative number (like error codes expressed using signed integers), you can surround the search with double quotes, for example searching for "-2147009290" is equivalent to searching for 0x80073CF6, 80073CF6 (or even 3CF6 in this specific case). If you don't surround negative numbers with double quotes, the system will search for signed and unsigned corresponding values.
    • The full-text search uses items' name, value, hex value, guid formats, source lines, etc. so refine your search if you get back too many items.
    • You can search for guid binary values using just a part of their full definition. For example, if you search for '79eac9c5', it will get you 3 guid entries
    • Leading wild card search (*whatever) is allowed, but it may slow down the search significantly.

    Here are some example or custom queries:

    title:wm_user returns the WM_USER Windows message item, not all items that reference the WM_USER token.

    title:wm_u* returns all items (Windows messages probably) whose name starts with WM_U*.

    value:1024 AND title:wm_* returns all items (Windows messages probably) whose name starts with WM_U* and value is 1024. Note AND must be UPPERCASE for database to understand it as an AND operator.

    value:"00000002-0000-0000-C000-000000000046" returns the IMalloc IID guid value.

  • Q: I always get back 400 items at most. Why?
    A: The MagNumDb site currently limits the number of returned items to this value by design. This should be enough for most real search scenarios (like enums with a big list of values).

  • Q: Some values are empty. Why?
    A: The expression evaluator cannot always compute the final value, because it sometimes require contextual information (custom defines, compiler architecture, etc.) that the parser doesn't have at parsing time. You can enable the Source line(s) column to check what's the corresponding source and try to work it out by yourself. The origin file path and line number is also included.

  • Q: Can I get all values for a given enum?
    A: Sure. For example, __VSHPROPID is the name of an enum, and a query like this: parent:__VSHPROPID will get all the enum's values (66 entries).

  • Q: I sometimes get back items whose name starts with "__magnumdb__enum_". Why?
    A: C allows unnamed enums. The MagNumDb parser just gives them a name, using the defining file name and a counter.

  • Q: I sometimes get back the same item/name twice or more with different values. For example:  TARGET_IS_NT60_OR_LATER. Why?
    A: This can be the case with defines. Their value may be different if they were surrounded by # directives (#if, #else, etc.) in the original source code. You can enable the Condition(s) column to check what are the corresponding conditions for a given item.
    Note: if a condition is surrounded with a funny REVERSE function token, it means the reverse condition of what's surrounded.

  • Q: I can't connect from an IP address but from another one, it works. Why?
    A: The server is constantly monitored for excessive usage. It's possible your IP address has been banned because massive sets of queries where observed. If you think this is an error, send us an email.

 Database Metrics

  • Last update date: Thursday October 7, 2021
  • Items count: 362743
  • Parsed files count: 9541
  • Windows SDK version: 10.0.22000.0
  • NetFx SDK version: 4.8
  • MSVC Tools version: 14.29.30133

 Rest API

There is a JSON version API (you will have to figure out the schema, it's pretty obvious) that you can call here (the search query is the 'q' parameter):

   https://www.magnumdb.com/api.aspx?q=0xC000000D&key=you-api-key-goes-here

Note this API also has a 400 items maximum limit and the server is monitored for excessive usage (the key can be removed without notice). If you want to get a key, send us an email.

 

 Contact

We welcome feedback.
Seen anything missing? A bug? A wrong value? Do you have any suggestion for improvements? Do you have an idea for a cool new feature?

Please contact us here

 About MagNumDB

MagNumDB  2017-2021 Simon Mourier V1.4.0. All rights reserved.

Profile for Simon Mourier at Stack Overflow, Q&A for professional and enthusiast programmers


All product names, logos, and brands are property of their respective owners. All company, product and service names used in this website are for identification purposes only.

All values, names, source code fragments displayed here have been extracted from files that are property of their respective owners.

THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND OTHER THAN AS SPECIFICALLY SET FORTH IN THE LICENSE AGREEMENT, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Index Score Name Type Value Hex value Signed value Guid formats Char type Storage type Source line(s) File path Condition(s)
Index Score Name Type Value Hex value Signed value Guid formats Char type Storage type Source line(s) File path Condition(s)
1 10.66596 KnownGamingPrivileges::XPRIVILEGE_BROADCAST Int32 190 0x000000BE -66 System.Int32
XPRIVILEGE_BROADCAST = 190,                     // The user can broadcast live gameplay
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(114,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
2 10.66596 KnownGamingPrivileges::XPRIVILEGE_VIEW_FRIENDS_LIST Int32 197 0x000000C5 -59 System.Int32
XPRIVILEGE_VIEW_FRIENDS_LIST = 197,             // The user can view other user's friends list if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(115,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
3 10.66596 KnownGamingPrivileges::XPRIVILEGE_GAME_DVR Int32 198 0x000000C6 -58 System.Int32
XPRIVILEGE_GAME_DVR = 198,                      // The user can upload recorded in-game videos to the cloud if this privilege is present. Viewing GameDVRs is subject to privacy controls.
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(116,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
4 10.66596 KnownGamingPrivileges::XPRIVILEGE_SHARE_KINECT_CONTENT Int32 199 0x000000C7 -57 System.Int32
XPRIVILEGE_SHARE_KINECT_CONTENT = 199,          // Kinect recorded content can be uploaded to the cloud for the user and made accessible to anyone if this privilege is present. Viewing other user's Kinect content is subject to a privacy setting.
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(117,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
5 10.66596 KnownGamingPrivileges::XPRIVILEGE_MULTIPLAYER_PARTIES Int32 203 0x000000CB -53 System.Int32
XPRIVILEGE_MULTIPLAYER_PARTIES = 203,           // The user can join a party session if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(118,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
6 10.66596 KnownGamingPrivileges::XPRIVILEGE_COMMUNICATION_VOICE_INGAME Int32 205 0x000000CD -51 System.Int32
XPRIVILEGE_COMMUNICATION_VOICE_INGAME = 205,    // The user can participate in voice chat during parties and multiplayer game sessions if this privilege is present. Communicating with other users is subject to additional privacy permission checks
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(119,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
7 10.66596 KnownGamingPrivileges::XPRIVILEGE_COMMUNICATION_VOICE_SKYPE Int32 206 0x000000CE -50 System.Int32
XPRIVILEGE_COMMUNICATION_VOICE_SKYPE = 206,     // The user can use voice communication with Skype on Xbox One if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(120,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
8 10.66596 KnownGamingPrivileges::XPRIVILEGE_CLOUD_GAMING_MANAGE_SESSION Int32 207 0x000000CF -49 System.Int32
XPRIVILEGE_CLOUD_GAMING_MANAGE_SESSION = 207,   // The user can allocate a cloud compute cluster and manage a cloud compute cluster for a hosted game session if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(121,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
9 10.66596 KnownGamingPrivileges::XPRIVILEGE_CLOUD_GAMING_JOIN_SESSION Int32 208 0x000000D0 -48 System.Int32
XPRIVILEGE_CLOUD_GAMING_JOIN_SESSION = 208,     // The user can join a cloud compute session if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(122,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
10 10.66596 KnownGamingPrivileges::XPRIVILEGE_CLOUD_SAVED_GAMES Int32 209 0x000000D1 -47 System.Int32
XPRIVILEGE_CLOUD_SAVED_GAMES = 209,             // The user can save games in cloud title storage if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(123,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
11 10.66596 KnownGamingPrivileges::XPRIVILEGE_SHARE_CONTENT Int32 211 0x000000D3 -45 System.Int32
XPRIVILEGE_SHARE_CONTENT = 211,                 // The user can share content with others if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(124,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
12 10.66596 KnownGamingPrivileges::XPRIVILEGE_PREMIUM_CONTENT Int32 214 0x000000D6 -42 System.Int32
XPRIVILEGE_PREMIUM_CONTENT = 214,               // The user can purchase, download and launch premium content available with the Xbox LIVE Gold subscription if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(125,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
13 10.66596 KnownGamingPrivileges::XPRIVILEGE_SUBSCRIPTION_CONTENT Int32 219 0x000000DB -37 System.Int32
XPRIVILEGE_SUBSCRIPTION_CONTENT = 219,          // The user can purchase and download premium subscription content and use premium subscription features when this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(126,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
14 10.66596 KnownGamingPrivileges::XPRIVILEGE_SOCIAL_NETWORK_SHARING Int32 220 0x000000DC -36 System.Int32
XPRIVILEGE_SOCIAL_NETWORK_SHARING = 220,        // The user is allowed to share progress information on social networks when this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(127,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
15 10.66596 KnownGamingPrivileges::XPRIVILEGE_PREMIUM_VIDEO Int32 224 0x000000E0 -32 System.Int32
XPRIVILEGE_PREMIUM_VIDEO = 224,                 // The user can access premium video services if this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(128,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
16 10.66596 KnownGamingPrivileges::XPRIVILEGE_VIDEO_COMMUNICATIONS Int32 235 0x000000EB -21 System.Int32
XPRIVILEGE_VIDEO_COMMUNICATIONS = 235,          // The user can use video communication with Skype or other providers when this privilege is present. Communicating with other users is subject to additional privacy permission checks
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(129,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
17 10.66596 KnownGamingPrivileges::XPRIVILEGE_PURCHASE_CONTENT Int32 245 0x000000F5 -11 System.Int32
XPRIVILEGE_PURCHASE_CONTENT = 245,              // The user is authorized to purchase content when this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(130,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
18 10.66596 KnownGamingPrivileges::XPRIVILEGE_USER_CREATED_CONTENT Int32 247 0x000000F7 -9 System.Int32
XPRIVILEGE_USER_CREATED_CONTENT = 247,          // The user is authorized to download and view online user created content when this privilege is present.
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(131,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
19 10.66596 KnownGamingPrivileges::XPRIVILEGE_PROFILE_VIEWING Int32 249 0x000000F9 -7 System.Int32
XPRIVILEGE_PROFILE_VIEWING = 249,               // The user is authorized to view other user's profiles when this privilege is present. Viewing other user's profiles is subject to additional privacy checks
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(132,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
20 10.66596 KnownGamingPrivileges::XPRIVILEGE_COMMUNICATIONS Int32 252 0x000000FC -4 System.Int32
XPRIVILEGE_COMMUNICATIONS = 252,                // The user can use asynchronous text messaging with anyone when this privilege is present. Extra privacy permissions checks are required to determine who the user is authorized to communicate with. Communicating with other users is subject to additional privacy permission checks
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(133,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
21 10.66596 KnownGamingPrivileges::XPRIVILEGE_MULTIPLAYER_SESSIONS Int32 254 0x000000FE -2 System.Int32
XPRIVILEGE_MULTIPLAYER_SESSIONS = 254,          // The user can join a multiplayer sessions for a game when this privilege is present.
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(134,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD
22 10.66596 KnownGamingPrivileges::XPRIVILEGE_ADD_FRIEND Int32 255 0x000000FF -1 System.Int32
XPRIVILEGE_ADD_FRIEND = 255,                    // The user can follow other Xbox LIVE users and add Xbox LIVE friends when this privilege is present
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.22000.0\um\gamingtcui.h(135,0)
  • If NTDDI_VERSION >= NTDDI_THRESHOLD