How does it work?

MagNumDB is a database that contains about 350,000 items. These items are constants, names, values all extracted from more than 6,000 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.

 Database Metrics

  • Last update date: Thursday May 13, 2020
  • Items count: 340878
  • Parsed files count: 8447
  • Windows SDK version: 10.0.19041.0
  • NetFx SDK version: 4.8
  • MSVC Tools version: 14.25.28610

 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 V1.3.2. 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 10.18393 FEATURE_PROFILE_TYPE::ProfileInvalid Int32 0 0x00000000 0 System.Int32
ProfileInvalid                  = 0x0000,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(71,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
2 10.18393 FEATURE_PROFILE_TYPE::ProfileNonRemovableDisk Int32 1 0x00000001 1 System.Int32
ProfileNonRemovableDisk         = 0x0001,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(72,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
3 10.18393 FEATURE_PROFILE_TYPE::ProfileRemovableDisk Int32 2 0x00000002 2 System.Int32
ProfileRemovableDisk            = 0x0002,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(73,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
4 10.18393 FEATURE_PROFILE_TYPE::ProfileMOErasable Int32 3 0x00000003 3 System.Int32
ProfileMOErasable               = 0x0003,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(74,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
5 10.18393 FEATURE_PROFILE_TYPE::ProfileMOWriteOnce Int32 4 0x00000004 4 System.Int32
ProfileMOWriteOnce              = 0x0004,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(75,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
6 10.18393 FEATURE_PROFILE_TYPE::ProfileAS_MO Int32 5 0x00000005 5 System.Int32
ProfileAS_MO                    = 0x0005,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(76,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
7 10.18393 FEATURE_PROFILE_TYPE::ProfileCdrom Int32 8 0x00000008 8 System.Int32
ProfileCdrom                    = 0x0008,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(78,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
8 10.18393 FEATURE_PROFILE_TYPE::ProfileCdRecordable Int32 9 0x00000009 9 System.Int32
ProfileCdRecordable             = 0x0009,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(79,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
9 10.18393 FEATURE_PROFILE_TYPE::ProfileCdRewritable Int32 10 0x0000000A 10 System.Int32
ProfileCdRewritable             = 0x000a,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(80,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
10 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdRom Int32 16 0x00000010 16 System.Int32
ProfileDvdRom                   = 0x0010,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(82,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
11 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdRecordable Int32 17 0x00000011 17 System.Int32
ProfileDvdRecordable            = 0x0011,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(83,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
12 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdRam Int32 18 0x00000012 18 System.Int32
ProfileDvdRam                   = 0x0012,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(84,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
13 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdRewritable Int32 19 0x00000013 19 System.Int32
ProfileDvdRewritable            = 0x0013,  // restricted overwrite
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(85,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
14 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdRWSequential Int32 20 0x00000014 20 System.Int32
ProfileDvdRWSequential          = 0x0014,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(86,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
15 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdDashRDualLayer Int32 21 0x00000015 21 System.Int32
ProfileDvdDashRDualLayer        = 0x0015,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(87,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
16 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdDashRLayerJump Int32 22 0x00000016 22 System.Int32
ProfileDvdDashRLayerJump        = 0x0016,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(88,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
17 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdPlusRW Int32 26 0x0000001A 26 System.Int32
ProfileDvdPlusRW                = 0x001A,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(90,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
18 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdPlusR Int32 27 0x0000001B 27 System.Int32
ProfileDvdPlusR                 = 0x001B,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(91,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
19 10.18393 FEATURE_PROFILE_TYPE::ProfileDDCdrom Int32 32 0x00000020 32 System.Int32
ProfileDDCdrom                  = 0x0020,  // obsolete
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(93,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
20 10.18393 FEATURE_PROFILE_TYPE::ProfileDDCdRecordable Int32 33 0x00000021 33 System.Int32
ProfileDDCdRecordable           = 0x0021,  // obsolete
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(94,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
21 10.18393 FEATURE_PROFILE_TYPE::ProfileDDCdRewritable Int32 34 0x00000022 34 System.Int32
ProfileDDCdRewritable           = 0x0022,  // obsolete
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(95,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
22 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdPlusRWDualLayer Int32 42 0x0000002A 42 System.Int32
ProfileDvdPlusRWDualLayer       = 0x002A,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(97,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
23 10.18393 FEATURE_PROFILE_TYPE::ProfileDvdPlusRDualLayer Int32 43 0x0000002B 43 System.Int32
ProfileDvdPlusRDualLayer        = 0x002B,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(98,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
24 10.18393 FEATURE_PROFILE_TYPE::ProfileBDRom Int32 64 0x00000040 64 System.Int32
ProfileBDRom                    = 0x0040,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(100,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
25 10.18393 FEATURE_PROFILE_TYPE::ProfileBDRSequentialWritable Int32 65 0x00000041 65 System.Int32
ProfileBDRSequentialWritable    = 0x0041,  // BD-R 'SRM'
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(101,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
26 10.18393 FEATURE_PROFILE_TYPE::ProfileBDRRandomWritable Int32 66 0x00000042 66 System.Int32
ProfileBDRRandomWritable        = 0x0042,  // BD-R 'RRM'
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(102,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
27 10.18393 FEATURE_PROFILE_TYPE::ProfileBDRewritable Int32 67 0x00000043 67 System.Int32
ProfileBDRewritable             = 0x0043,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(103,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
28 10.18393 FEATURE_PROFILE_TYPE::ProfileHDDVDRom Int32 80 0x00000050 80 System.Int32
ProfileHDDVDRom                 = 0x0050,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(105,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
29 10.18393 FEATURE_PROFILE_TYPE::ProfileHDDVDRecordable Int32 81 0x00000051 81 System.Int32
ProfileHDDVDRecordable          = 0x0051,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(106,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
30 10.18393 FEATURE_PROFILE_TYPE::ProfileHDDVDRam Int32 82 0x00000052 82 System.Int32
ProfileHDDVDRam                 = 0x0052,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(107,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
31 10.18393 FEATURE_PROFILE_TYPE::ProfileHDDVDRewritable Int32 83 0x00000053 83 System.Int32
ProfileHDDVDRewritable          = 0x0053,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(108,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
32 10.18393 FEATURE_PROFILE_TYPE::ProfileHDDVDRDualLayer Int32 88 0x00000058 88 System.Int32
ProfileHDDVDRDualLayer          = 0x0058,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(110,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
33 10.18393 FEATURE_PROFILE_TYPE::ProfileHDDVDRWDualLayer Int32 90 0x0000005A 90 System.Int32
ProfileHDDVDRWDualLayer         = 0x005A,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(112,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
34 10.18393 FEATURE_PROFILE_TYPE::ProfileNonStandard Int32 65535 0x0000FFFF -1 System.Int32
ProfileNonStandard              = 0xffff
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\shared\ntddmmc.h(114,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)