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 Details

  • Last update date: Monday May 30, 2022
  • Items count: 368054
  • Parsed files count: 9521
  • Windows SDK version: 10.0.22621.0
  • NetFx SDK version: 4.8
  • MSVC Tools version: 14.32.31326
  • KMDF version: 1.33
  • UMDF version: 2.33

 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.

 

 Privacy & Terms

This privacy policy is for the www.magnumdb.com website and governs the privacy of online users who choose to use it. It sets out the different areas where user privacy is concerned and outlines the obligations and requirements of the users, the website and website owners.

 Cookies

www.magnumdb.com uses cookies for the sole reason of monitoring and improving our services, using Google Analytics. You can however decide to opt out of having your anonymized browsing activity within this site recorded by monitoring cookies, if you follow the instructions from Google here: Google Analytics Opt-out Browser Add-on

 User Information Storage

www.magnumdb.com stores no User Information nor Personal Data, at all.

 Data Security and Retention

This site application is hosted in Microsoft Azure in the "Central US" data center. See Microsoft’s Azure Trust Center for more information.

We make reasonable efforts to ensure a level of security appropriate to the risk associated with the processing of data.

Unfortunately, no data transmission or storage system can be guaranteed to be 100% secure. If you have reason to believe that your interaction with us is no longer secure, please contact us immediately.

We do not retain any Personal Data. Where we retain data, we do so in accordance with any limitation periods and records retention obligations that are imposed by applicable law.

   Disclaimer

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.

 

 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 © 2017-2022 Simon Mourier V1.5.0. 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 10.2331 CorTypeAttr::tdVisibilityMask Int32 7 0x00000007 7 System.Int32
tdVisibilityMask        =   0x00000007,
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(281,0)
2 10.2331 CorTypeAttr::tdNotPublic Int32 0 0x00000000 0 System.Int32
tdNotPublic             =   0x00000000,     // Class is not public scope.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(282,0)
3 10.2331 CorTypeAttr::tdPublic Int32 1 0x00000001 1 System.Int32
tdPublic                =   0x00000001,     // Class is public scope.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(283,0)
4 10.2331 CorTypeAttr::tdNestedPublic Int32 2 0x00000002 2 System.Int32
tdNestedPublic          =   0x00000002,     // Class is nested with public visibility.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(284,0)
5 10.2331 CorTypeAttr::tdNestedPrivate Int32 3 0x00000003 3 System.Int32
tdNestedPrivate         =   0x00000003,     // Class is nested with private visibility.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(285,0)
6 10.2331 CorTypeAttr::tdNestedFamily Int32 4 0x00000004 4 System.Int32
tdNestedFamily          =   0x00000004,     // Class is nested with family visibility.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(286,0)
7 10.2331 CorTypeAttr::tdNestedAssembly Int32 5 0x00000005 5 System.Int32
tdNestedAssembly        =   0x00000005,     // Class is nested with assembly visibility.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(287,0)
8 10.2331 CorTypeAttr::tdNestedFamANDAssem Int32 6 0x00000006 6 System.Int32
tdNestedFamANDAssem     =   0x00000006,     // Class is nested with family and assembly visibility.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(288,0)
9 10.2331 CorTypeAttr::tdNestedFamORAssem Int32 7 0x00000007 7 System.Int32
tdNestedFamORAssem      =   0x00000007,     // Class is nested with family or assembly visibility.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(289,0)
10 10.2331 CorTypeAttr::tdLayoutMask Int32 24 0x00000018 24 System.Int32
tdLayoutMask            =   0x00000018,
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(292,0)
11 10.2331 CorTypeAttr::tdAutoLayout Int32 0 0x00000000 0 System.Int32
tdAutoLayout            =   0x00000000,     // Class fields are auto-laid out
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(293,0)
12 10.2331 CorTypeAttr::tdSequentialLayout Int32 8 0x00000008 8 System.Int32
tdSequentialLayout      =   0x00000008,     // Class fields are laid out sequentially
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(294,0)
13 10.2331 CorTypeAttr::tdExplicitLayout Int32 16 0x00000010 16 System.Int32
tdExplicitLayout        =   0x00000010,     // Layout is supplied explicitly
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(295,0)
14 10.2331 CorTypeAttr::tdClassSemanticsMask Int32 32 0x00000020 32 System.Int32
tdClassSemanticsMask    =   0x00000020,
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(299,0)
15 10.2331 CorTypeAttr::tdClass Int32 0 0x00000000 0 System.Int32
tdClass                 =   0x00000000,     // Type is a class.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(300,0)
16 10.2331 CorTypeAttr::tdInterface Int32 32 0x00000020 32 System.Int32
tdInterface             =   0x00000020,     // Type is an interface.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(301,0)
17 10.2331 CorTypeAttr::tdAbstract Int32 128 0x00000080 -128 System.Int32
tdAbstract              =   0x00000080,     // Class is abstract
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(305,0)
18 10.2331 CorTypeAttr::tdSealed Int32 256 0x00000100 256 System.Int32
tdSealed                =   0x00000100,     // Class is concrete and may not be extended
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(306,0)
19 10.2331 CorTypeAttr::tdSpecialName Int32 1024 0x00000400 1024 System.Int32
tdSpecialName           =   0x00000400,     // Class name is special.  Name describes how.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(307,0)
20 10.2331 CorTypeAttr::tdImport Int32 4096 0x00001000 4096 System.Int32
tdImport                =   0x00001000,     // Class / interface is imported
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(310,0)
21 10.2331 CorTypeAttr::tdSerializable Int32 8192 0x00002000 8192 System.Int32
tdSerializable          =   0x00002000,     // The class is Serializable.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(311,0)
22 10.2331 CorTypeAttr::tdWindowsRuntime Int32 16384 0x00004000 16384 System.Int32
tdWindowsRuntime        =   0x00004000,     // The type is a Windows Runtime type
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(312,0)
23 10.2331 CorTypeAttr::tdStringFormatMask Int32 196608 0x00030000 196608 System.Int32
tdStringFormatMask      =   0x00030000,
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(315,0)
24 10.2331 CorTypeAttr::tdAnsiClass Int32 0 0x00000000 0 System.Int32
tdAnsiClass             =   0x00000000,     // LPTSTR is interpreted as ANSI in this class
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(316,0)
25 10.2331 CorTypeAttr::tdUnicodeClass Int32 65536 0x00010000 65536 System.Int32
tdUnicodeClass          =   0x00010000,     // LPTSTR is interpreted as UNICODE
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(317,0)
26 10.2331 CorTypeAttr::tdAutoClass Int32 131072 0x00020000 131072 System.Int32
tdAutoClass             =   0x00020000,     // LPTSTR is interpreted automatically
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(318,0)
27 10.2331 CorTypeAttr::tdCustomFormatClass Int32 196608 0x00030000 196608 System.Int32
tdCustomFormatClass     =   0x00030000,     // A non-standard encoding specified by CustomFormatMask
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(319,0)
28 10.2331 CorTypeAttr::tdCustomFormatMask Int32 12582912 0x00C00000 12582912 System.Int32
tdCustomFormatMask      =   0x00C00000,     // Use this mask to retrieve non-standard encoding information for native interop. The meaning of the values of these 2 bits is unspecified.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(320,0)
29 10.2331 CorTypeAttr::tdBeforeFieldInit Int32 1048576 0x00100000 1048576 System.Int32
tdBeforeFieldInit       =   0x00100000,     // Initialize the class any time before first static field access.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(324,0)
30 10.2331 CorTypeAttr::tdForwarder Int32 2097152 0x00200000 2097152 System.Int32
tdForwarder             =   0x00200000,     // This ExportedType is a type forwarder.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(325,0)
31 10.2331 CorTypeAttr::tdReservedMask Int32 264192 0x00040800 264192 System.Int32
tdReservedMask          =   0x00040800,
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(328,0)
32 10.2331 CorTypeAttr::tdRTSpecialName Int32 2048 0x00000800 2048 System.Int32
tdRTSpecialName         =   0x00000800,     // Runtime should check name encoding.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(329,0)
33 10.2331 CorTypeAttr::tdHasSecurity Int32 262144 0x00040000 262144 System.Int32
tdHasSecurity           =   0x00040000,     // Class has security associate with it.
%ProgramFiles(x86)%\Windows Kits\NETFXSDK\4.8\include\um\CorHdr.h(330,0)