database.dd

DataDraw is an ultra-fast persistent database for high performance programs written in C. It s so fa

// These are DataDraw's data structures

module Database dv volatile

enum RelationshipType REL_
    LINKED_LIST
    DOUBLY_LINKED
    TAIL_LINKED
    POINTER
    ARRAY
    HASHED

enum PropertyType PROP_
    INT
    UINT
    FLOAT
    DOUBLE
    BIT
    BOOL
    CHAR
    ENUM
    TYPEDEF
    POINTER
    SYM
    UNBOUND

enum MemoryStyle MEM_
    CREATE_ONLY
    FREE_LIST

// This just gives us a way to keep track of top level data structures
class Root create_only

class Modpath create_only

class Module create_only
    sym prefixSym
    bit Persistent
    bit UndoRedo
    uint16 numFields // The total number of fields to be tracked
    uint32 numClasses // The number of classes in the module
    uint32 numEnums // The number of classes in the module

// Helper class to break many-to-many relationship between modules and modules they import
class Link create_only

class Schema create_only

class Enum create_only
    sym prefixSym
    uint16 numEntries

class Entry create_only
    uint32 value

class Typedef create_only

class Class create_only
    MemoryStyle memoryStyle
    uint8 referenceSize
    bit generateArrayClass
    uint16 numFields

class Property create_only
    PropertyType type
    bit Array
    bit Cascade
    uint32 fieldNumber // Used in persistent databases
    Property firstElementProp // Used only for arrays
    Property numElementsProp // Used only for arrays
    bit hidden // Hides fields in the manager.  Used if we have to add a free-list property
    union type
	Enum enumProp: ENUM
	Typedef typedefProp: TYPEDEF
	Class classProp: POINTER
	sym typeSym: SYM // This is only used during parsing, to allow for forward references
	uint8 width: INT UINT
    uint32 line // This is set in parsing so we can report a line number in binding errors

class Relationship create_only
    RelationshipType type
    sym parentLabelSym
    sym childLabelSym
    bit Mandatory // Upper case avoids keyword collision
    bit Cascade
    bit accessChild
    bit accessParent
    bit sharedParent // Set for all but one relationship that share a common parent pointer

class Union
    sym propertySym
    Property typeProperty
    uint32 line // This is set in parsing so we can report a line number in binding errors
    uint16 number // This is used rather than a name, since unions are not named
    uint32 fieldNumber // Used in persistent databases
    uint16 numCases

class Case
    sym entrySym // Used in binding to an entry

// Relationships are not owned by one class, but shared equally between "parent" and "child"
relationship Root Modpath hashed mandatory
relationship Root Module hashed child_only mandatory

relationship Module Class hashed mandatory
relationship Module Enum hashed mandatory
relationship Module Typedef hashed mandatory
relationship Module Schema hashed mandatory
relationship Module:Import Link:Import tail_linked mandatory
relationship Module:Export Link:Export tail_linked mandatory

relationship Schema Class tail_linked

relationship Class Property hashed mandatory
relationship Class Property:freeList child_only

relationship Enum Entry hashed mandatory

relationship Class:base Class:derived tail_linked mandatory
relationship Class:parent Relationship:child tail_linked mandatory
relationship Class:child Relationship:parent tail_linked mandatory
relationship Class Union tail_linked

relationship Union Property tail_linked
relationship Entry Case tail_linked mandatory
relationship Property Case tail_linked mandatory