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 August 29, 2019
  • Items count: 350276
  • Parsed files count: 7563
  • Windows SDK version: 10.0.18362.0
  • NetFx SDK version: 4.8
  • MSVC Tools version: 14.22.27905

 

 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  2017-2019 Simon Mourier V1.3.1. 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 5.661504 SnapPointsType::Mandatory Int32 2 0x00000002 2 System.Int32
Mandatory       = 2,
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\winrt\windows.ui.xaml.controls.idl(3902,0)
2 3.336073 SDDL_ML_LOW String LW Narrow System.TypedString
#define SDDL_ML_LOW                         TEXT("LW")      // Low mandatory level
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\sddl.h(218,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
3 3.336073 SDDL_ML_MEDIUM String ME Narrow System.TypedString
#define SDDL_ML_MEDIUM                      TEXT("ME")      // Medium mandatory level
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\sddl.h(219,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
4 3.336073 SDDL_ML_MEDIUM_PLUS String MP Narrow System.TypedString
#define SDDL_ML_MEDIUM_PLUS                 TEXT("MP")      // Medium Plus mandatory level
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\sddl.h(220,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
5 3.336073 SDDL_ML_HIGH String HI Narrow System.TypedString
#define SDDL_ML_HIGH                        TEXT("HI")      // High mandatory level
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\sddl.h(221,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
6 3.336073 SDDL_ML_SYSTEM String SI Narrow System.TypedString
#define SDDL_ML_SYSTEM                      TEXT("SI")      // System mandatory level
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\sddl.h(222,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
7 3.336073 PT_MANDATORY Int32 4 0x00000004 4 System.Int32
#define PT_MANDATORY                 0x00000004      // The loaded profile is mandatory.
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\um\UserEnv.h(174,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
  • If (WINVER >= 0x0500)
8 3.336073 MEDIA_BLANK_TYPE::MediaBlankTypeFull Int32 0 0x00000000 0 System.Int32
MediaBlankTypeFull = 0,               // mandatory support
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\ntddcdrm.h(575,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
9 3.336073 MEDIA_BLANK_TYPE::MediaBlankTypeMinimal Int32 1 0x00000001 1 System.Int32
MediaBlankTypeMinimal = 1,            // mandatory support
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\ntddcdrm.h(576,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
10 3.336073 MEDIA_BLANK_TYPE::MediaBlankTypeTrackTail Int32 4 0x00000004 4 System.Int32
MediaBlankTypeTrackTail = 4,          // mandatory support
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\ntddcdrm.h(579,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
11 2.889124 MEDIA_BLANK_TYPE Enum
typedef enum _MEDIA_BLANK_TYPE {
    MediaBlankTypeFull = 0,               // mandatory support
    MediaBlankTypeMinimal = 1,            // mandatory support
    MediaBlankTypeIncompleteTrack = 2,    // optional support
    MediaBlankTypeUnreserveLastTrack = 3, // optional support, hairy
    MediaBlankTypeTrackTail = 4,          // mandatory support
    MediaBlankTypeUncloseLastSession = 5, // optional support
    MediaBlankTypeEraseLastSession = 6,   // optional support
} MEDIA_BLANK_TYPE, *PMEDIA_BLANK_TYPE;
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\shared\ntddcdrm.h(574,0)
  • If WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_SYSTEM)
12 2.668859 NDIS_FILTER_ATTACH_FLAGS_IGNORE_MANDATORY Int32 1 0x00000001 1 System.Int32
#define NDIS_FILTER_ATTACH_FLAGS_IGNORE_MANDATORY          0x00000001   // If a mandatory filter fails to attach, it can set the flag
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\km\ndis.h(15680,0)
  • If !defined(_NDIS_)
  • If NDIS_SUPPORT_NDIS6
13 2.668859 SDBUS_SPEED_MODE::SDBUS_SPEED_MODE_SDR104 Int32 3 0x00000003 3 System.Int32
SDBUS_SPEED_MODE_SDR104,            // 208MHz or below, max 104MB/s, tuning mandatory
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\km\sddef.h(216,0)
14 2.668859 SDBUS_SPEED_MODE::SDBUS_SPEED_MODE_HS200 Int32 5 0x00000005 5 System.Int32
SDBUS_SPEED_MODE_HS200,             // 200MHz or below, max 200MB/s. tuning mandatory
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\km\sddef.h(218,0)
15 2.668859 SDBUS_SPEED_MODE::SDBUS_SPEED_MODE_HS400 Int32 6 0x00000006 6 System.Int32
SDBUS_SPEED_MODE_HS400              // 200MHz or below, max 400MB/s, tuning mandatory
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\km\sddef.h(219,0)
16 2.668859 SnapPointsType Enum
enum SnapPointsType
                {
                    None            = 0,
                    Optional        = 1,
                    Mandatory       = 2,
                    OptionalSingle  = 3,
                    MandatorySingle = 4
                };
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\winrt\windows.ui.xaml.controls.idl(3898,0)
17 2.335251 NFC_CX_DRIVER_FLAGS::NFC_CX_DRIVER_POWER_AND_LINK_CONTROL_SUPPORTED Int32 2048 0x00000800 2048 System.Int32
NFC_CX_DRIVER_POWER_AND_LINK_CONTROL_SUPPORTED = 0x000000800, //  NFCEE_POWER_AND_LINK_CTRL is supported for the NCI 1.x protocol as an extension. (Command is mandatory for NCI 2.x.)
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\um\nfc\1.0\nfccx.h(72,0)
18 2.311299 SDBUS_SPEED_MODE Enum
typedef enum {
    SDBUS_SPEED_MODE_NORMAL = 0,        // 25MHz or below, max 12.5MB/s (SDR12)
    SDBUS_SPEED_MODE_HIGH,              // 50MHz or below, max 25MB/s (SDR25)
    SDBUS_SPEED_MODE_SDR50,             // 104MHz or below, max 50MB/s, tuning optional
    SDBUS_SPEED_MODE_SDR104,            // 208MHz or below, max 104MB/s, tuning mandatory
    SDBUS_SPEED_MODE_DDR50,             // 50MHz or below, max 50MB/s
    SDBUS_SPEED_MODE_HS200,             // 200MHz or below, max 200MB/s. tuning mandatory
    SDBUS_SPEED_MODE_HS400              // 200MHz or below, max 400MB/s, tuning mandatory
} SDBUS_SPEED_MODE;
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\km\sddef.h(212,0)
19 1.887168 ULineBreakTag Enum
typedef enum ULineBreakTag {
    /** Tag value for soft line breaks, positions at which a line break
      *  is acceptable but not required                */
    UBRK_LINE_SOFT            = 0,
    /** Upper bound for soft line breaks.              */
    /** Upper bound for soft line breaks.              */
    UBRK_LINE_SOFT_LIMIT      = 100,
    /** Tag value for a hard, or mandatory line break  */
    /** Tag value for a hard, or mandatory line break  */
    UBRK_LINE_HARD            = 100,
    /** Upper bound for hard line breaks.              */
    /** Upper bound for hard line breaks.              */
    UBRK_LINE_HARD_LIMIT      = 200
} ULineBreakTag;
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\um\icu.h(27678,0)
  • If (NTDDI_VERSION >= NTDDI_WIN10_RS3)
  • If !UCONFIG_NO_BREAK_ITERATION
  • If (NTDDI_VERSION >= NTDDI_WIN10_RS2)
20 1.887168 USentenceBreakTag Enum
typedef enum USentenceBreakTag {
    /** Tag value for for sentences  ending with a sentence terminator
      */
    UBRK_SENTENCE_TERM       = 0,
    /** Upper bound for tags for sentences ended by sentence terminators.    */
    /** Upper bound for tags for sentences ended by sentence terminators.    */
    UBRK_SENTENCE_TERM_LIMIT = 100,
    /** Tag value for for sentences that do not contain an ending
      */
    UBRK_SENTENCE_SEP        = 100,
    /** Upper bound for tags for sentences ended by a separator.              */
    /** Upper bound for tags for sentences ended by a separator.              */
    UBRK_SENTENCE_SEP_LIMIT  = 200
    /** Tag value for a hard, or mandatory line break  */
    /** Tag value for a hard, or mandatory line break  */
} USentenceBreakTag;
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\um\icu.h(27703,0)
  • If (NTDDI_VERSION >= NTDDI_WIN10_RS3)
  • If !UCONFIG_NO_BREAK_ITERATION
  • If (NTDDI_VERSION >= NTDDI_WIN10_RS2)
21 1.000822 NFC_CX_DRIVER_FLAGS Enum
typedef enum _NFC_CX_DRIVER_FLAGS {
    NFC_CX_DRIVER_DISABLE_WTD_TIMER = 0x00000001, //  Disable watchdog timer in CX
    NFC_CX_DRIVER_DISABLE_NFCEE_DISCOVERY = 0x00000002, //  Disable NFCEE discovery
    NFC_CX_DRIVER_DISABLE_RECOVERY_MODE = 0x00000004, //  Disable NCI recovery mechanism in CX
    NFC_CX_DRIVER_DISABLE_HOST_CARD_EMULATION = 0x000000010, //  Disable host card emulation feature
    NFC_CX_DRIVER_HCI_NETWORK_PER_NFCEE = 0x000000020, //  NFCC implements a separate HCI network per NFCEE
    NFC_CX_DRIVER_DISABLE_NFCEE_ACTION_NTF = 0x000000040, //  Disable NFCEE action notification
    NFC_CX_DRIVER_ENABLE_EEPROM_WRITE_PROTECTION = 0x000000080, //  Enable opt to over-write only when configs change
    NFC_CX_DRIVER_ISODEP_RNAK_PRESENCE_CHK_SUPPORTED = 0x000000100, //  The R-NAK command for ISO-DEP will be used for presence check
    NFC_CX_DRIVER_RF_ROUTING_POWER_SUB_STATES_SUPPORTED = 0x000000200, //  Indicates support for RF routing switched ON power sub-states
    NFC_CX_DRIVER_SKIP_DEVICE_STOP_IDLE = 0x000000400, //  CX will not call WdfDeviceStopIdle or WdfDeviceResumeIdle
    NFC_CX_DRIVER_POWER_AND_LINK_CONTROL_SUPPORTED = 0x000000800, //  NFCEE_POWER_AND_LINK_CTRL is supported for the NCI 1.x protocol as an extension. (Command is mandatory for NCI 2.x.)
} NFC_CX_DRIVER_FLAGS, *PNFC_CX_DRIVER_FLAGS;
%ProgramFiles(x86)%\Windows Kits\10\Include\10.0.18362.0\um\nfc\1.0\nfccx.h(61,0)