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

 

 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  2017-2020 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 10.00161 BMFORMAT::BM_x555RGB Int32 0 0x00000000 0 System.Int32
BM_x555RGB      = 0x0000,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(247,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
2 10.00161 BMFORMAT::BM_x555XYZ Int32 257 0x00000101 257 System.Int32
BM_x555XYZ      = 0x0101,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(248,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
3 10.00161 BMFORMAT::BM_x555Yxy Int32 258 0x00000102 258 System.Int32
BM_x555Yxy,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(249,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
4 10.00161 BMFORMAT::BM_x555Lab Int32 259 0x00000103 259 System.Int32
BM_x555Lab,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(250,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
5 10.00161 BMFORMAT::BM_x555G3CH Int32 260 0x00000104 260 System.Int32
BM_x555G3CH,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(251,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
6 10.00161 BMFORMAT::BM_RGBTRIPLETS Int32 2 0x00000002 2 System.Int32
BM_RGBTRIPLETS  = 0x0002,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(258,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
7 10.00161 BMFORMAT::BM_BGRTRIPLETS Int32 4 0x00000004 4 System.Int32
BM_BGRTRIPLETS  = 0x0004,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(259,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
8 10.00161 BMFORMAT::BM_XYZTRIPLETS Int32 513 0x00000201 513 System.Int32
BM_XYZTRIPLETS  = 0x0201,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(260,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
9 10.00161 BMFORMAT::BM_YxyTRIPLETS Int32 514 0x00000202 514 System.Int32
BM_YxyTRIPLETS,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(261,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
10 10.00161 BMFORMAT::BM_LabTRIPLETS Int32 515 0x00000203 515 System.Int32
BM_LabTRIPLETS,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(262,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
11 10.00161 BMFORMAT::BM_G3CHTRIPLETS Int32 516 0x00000204 516 System.Int32
BM_G3CHTRIPLETS,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(263,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
12 10.00161 BMFORMAT::BM_5CHANNEL Int32 517 0x00000205 517 System.Int32
BM_5CHANNEL,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(264,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
13 10.00161 BMFORMAT::BM_6CHANNEL Int32 518 0x00000206 518 System.Int32
BM_6CHANNEL,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(265,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
14 10.00161 BMFORMAT::BM_7CHANNEL Int32 519 0x00000207 519 System.Int32
BM_7CHANNEL,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(266,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
15 10.00161 BMFORMAT::BM_8CHANNEL Int32 520 0x00000208 520 System.Int32
BM_8CHANNEL,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(267,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
16 10.00161 BMFORMAT::BM_GRAY Int32 521 0x00000209 521 System.Int32
BM_GRAY,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(268,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
17 10.00161 BMFORMAT::BM_xRGBQUADS Int32 8 0x00000008 8 System.Int32
BM_xRGBQUADS    = 0x0008,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(275,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
18 10.00161 BMFORMAT::BM_xBGRQUADS Int32 16 0x00000010 16 System.Int32
BM_xBGRQUADS    = 0x0010,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(276,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
19 10.00161 BMFORMAT::BM_xG3CHQUADS Int32 772 0x00000304 772 System.Int32
BM_xG3CHQUADS   = 0x0304,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(277,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
20 10.00161 BMFORMAT::BM_KYMCQUADS Int32 773 0x00000305 773 System.Int32
BM_KYMCQUADS,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(278,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
21 10.00161 BMFORMAT::BM_CMYKQUADS Int32 32 0x00000020 32 System.Int32
BM_CMYKQUADS    = 0x0020,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(279,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
22 10.00161 BMFORMAT::BM_10b_RGB Int32 9 0x00000009 9 System.Int32
BM_10b_RGB      = 0x0009,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(285,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
23 10.00161 BMFORMAT::BM_10b_XYZ Int32 1025 0x00000401 1025 System.Int32
BM_10b_XYZ      = 0x0401,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(286,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
24 10.00161 BMFORMAT::BM_10b_Yxy Int32 1026 0x00000402 1026 System.Int32
BM_10b_Yxy,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(287,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
25 10.00161 BMFORMAT::BM_10b_Lab Int32 1027 0x00000403 1027 System.Int32
BM_10b_Lab,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(288,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
26 10.00161 BMFORMAT::BM_10b_G3CH Int32 1028 0x00000404 1028 System.Int32
BM_10b_G3CH,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(289,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
27 10.00161 BMFORMAT::BM_NAMED_INDEX Int32 1029 0x00000405 1029 System.Int32
BM_NAMED_INDEX,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(295,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
28 10.00161 BMFORMAT::BM_16b_RGB Int32 10 0x0000000A 10 System.Int32
BM_16b_RGB      = 0x000A,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(302,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
29 10.00161 BMFORMAT::BM_16b_XYZ Int32 1281 0x00000501 1281 System.Int32
BM_16b_XYZ      = 0x0501,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(303,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
30 10.00161 BMFORMAT::BM_16b_Yxy Int32 1282 0x00000502 1282 System.Int32
BM_16b_Yxy,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(304,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
31 10.00161 BMFORMAT::BM_16b_Lab Int32 1283 0x00000503 1283 System.Int32
BM_16b_Lab,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(305,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
32 10.00161 BMFORMAT::BM_16b_G3CH Int32 1284 0x00000504 1284 System.Int32
BM_16b_G3CH,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(306,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
33 10.00161 BMFORMAT::BM_16b_GRAY Int32 1285 0x00000505 1285 System.Int32
BM_16b_GRAY,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(307,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
34 10.00161 BMFORMAT::BM_565RGB Int32 1 0x00000001 1 System.Int32
BM_565RGB       = 0x0001,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(313,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
35 10.00161 BMFORMAT::BM_32b_scRGB Int32 1537 0x00000601 1537 System.Int32
BM_32b_scRGB            = 0x0601,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(321,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
36 10.00161 BMFORMAT::BM_32b_scARGB Int32 1538 0x00000602 1538 System.Int32
BM_32b_scARGB           = 0x0602,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(322,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
37 10.00161 BMFORMAT::BM_S2DOT13FIXED_scRGB Int32 1539 0x00000603 1539 System.Int32
BM_S2DOT13FIXED_scRGB   = 0x0603,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(323,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
38 10.00161 BMFORMAT::BM_S2DOT13FIXED_scARGB Int32 1540 0x00000604 1540 System.Int32
BM_S2DOT13FIXED_scARGB  = 0x0604,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(324,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
39 10.00161 BMFORMAT::BM_R10G10B10A2 Int32 1793 0x00000701 1793 System.Int32
BM_R10G10B10A2          = 0x0701,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(328,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
40 10.00161 BMFORMAT::BM_R10G10B10A2_XR Int32 1794 0x00000702 1794 System.Int32
BM_R10G10B10A2_XR        = 0x0702,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(329,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
41 10.00161 BMFORMAT::BM_R16G16B16A16_FLOAT Int32 1795 0x00000703 1795 System.Int32
BM_R16G16B16A16_FLOAT   = 0x0703
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.19041.0\um\Icm.h(330,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)