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wbDataFormat.pas
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wbDataFormat.pas
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unit wbDataFormat;
//{$DEFINE DFDEBUG}
interface
uses
SysUtils, StrUtils, Classes, Windows, Math, Variants, JsonDataObjects;
type
TdfDataType = (
dtNone,
dtStruct,
dtArray,
dtUnion,
dtMerge,
dtBytes,
dtChars,
dtU8,
dtS8,
dtU16,
dtS16,
dtU32,
dtS32,
dtU64,
dtS64,
dtFloat16,
dtFloat32
);
TdfResourceOpenDataCallback = function(const aContainerName, aFileName: string): TBytes;
const
// embedded value size
// values that fit don't allocate memory (for optimization)
dfEmbeddedValueSize = 8;
DefSizes: array [TdfDataType] of integer = (
0, // dtNone
0, // dtStruct
0, // dtArray
0, // dtUnion
0, // dtMerge
0, // dtBytes
0, // dtChars
1, // dtU8
1, // dtS8
2, // dtU16
2, // dtS16
4, // dtU32
4, // dtS32
8, // dtU64
8, // dtS64
2, // dtFloat16
4 // dtFloat32
);
DF_OnCreate = 1;
DF_OnDestroy = 2;
DF_OnGetEnabled = 3;
DF_OnDecide = 4;
DF_OnAfterLoad = 5;
DF_OnBeforeSave = 6;
DF_OnGetValue = 11;
DF_OnSetValue = 12;
DF_OnGetText = 13;
DF_OnSetText = 14;
DF_OnGetCount = 15;
DF_OnSetCount = 16;
DF_OnLinksTo = 17;
sFlagsDelimiter = '|';
sFloatByte128 = '0.501961';
var
dfFloatDecimalDigits: Integer = 6;
dfResourceGetDataCallback: TdfResourceOpenDataCallback = nil;
type
TdfDataState = (
dsInitialized,
dsEnabled,
dsUpdating,
dsDeciding,
dsDestroying
);
TdfDataStates = set of TdfDataState;
TdfElement = class;
TdfElements = array of TdfElement;
TdfDef = class;
TdfDefs = array of TdfDef;
TdfOnCreateEvent = procedure(const aElement: TdfElement);
TdfOnDestroyEvent = procedure(const aElement: TdfElement);
TdfOnEnabledEvent = function(const aElement: TdfElement): Boolean;
TdfOnDecideEvent = function(const aElement: TdfElement): Integer;
TdfOnAfterLoadEvent = procedure(const aElement: TdfElement; const aDataStart: Pointer; aDataSize: Integer);
TdfOnBeforeSaveEvent = procedure(const aElement: TdfElement);
TdfOnValueEvent = procedure(const aElement: TdfElement; var aValue: Variant);
TdfOnTextEvent = procedure(const aElement: TdfElement; var aText: string);
TdfOnCountEvent = procedure(const aElement: TdfElement; var aCount: Integer);
TdfOnLinksToEvent = function(const aElement: TdfElement): TdfElement;
TdfDef = class
private
FName: string;
FNameHash: Cardinal;
FDataType: TdfDataType;
FDefs: TdfDefs;
FDefaultValue: string;
FSize: integer;
FOnCreate: TdfOnCreateEvent;
FOnDestroy: TdfOnDestroyEvent;
FOnGetEnabled: TdfOnEnabledEvent;
FOnDecide: TdfOnDecideEvent;
FOnAfterLoad: TdfOnAfterLoadEvent;
FOnBeforeSave: TdfOnBeforeSaveEvent;
FOnGetValue: TdfOnValueEvent;
FOnSetValue: TdfOnValueEvent;
FOnGetText: TdfOnTextEvent;
FOnSetText: TdfOnTextEvent;
FOnGetCount: TdfOnCountEvent;
FOnSetCount: TdfOnCountEvent;
FOnLinksTo: TdfOnLinksToEvent;
protected
function GetDefaultDataSize: integer; virtual;
public
constructor Create(const aName: string; aDataType: TdfDataType; const aDefs: array of TdfDef);
destructor Destroy; override;
function Clone: TdfDef; virtual; abstract;
procedure Assign(const aDef: TdfDef); virtual;
function CalcHash(const s: string): Cardinal;
procedure AssignEvents(const aEvents: array of const);
function CreateElement(const aParent: TdfElement): TdfElement; virtual;
procedure GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); virtual;
procedure SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); virtual;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); virtual;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); virtual;
procedure AddDef(const aDef: TdfDef);
procedure InsertDefsFrom(const aDef: TdfDef; Index: Integer);
property Name: string read FName;
property NameHash: Cardinal read FNameHash;
property DataType: TdfDataType read FDataType;
property DefaultDataSize: integer read GetDefaultDataSize;
property Defs: TdfDefs read FDefs;
property DefaultValue: string read FDefaultValue write FDefaultValue;
property Size: integer read FSize write FSize;
property OnCreate: TdfOnCreateEvent read FOnCreate write FOnCreate;
property OnDestroy: TdfOnDestroyEvent read FOnDestroy write FOnDestroy;
property OnGetEnabled: TdfOnEnabledEvent read FOnGetEnabled write FOnGetEnabled;
property OnDecide: TdfOnDecideEvent read FOnDecide write FOnDecide;
property OnAfterLoad: TdfOnAfterLoadEvent read FOnAfterLoad write FOnAfterLoad;
property OnBeforeSave: TdfOnBeforeSaveEvent read FOnBeforeSave write FOnBeforeSave;
property OnGetValue: TdfOnValueEvent read FOnGetValue write FOnGetValue;
property OnSetValue: TdfOnValueEvent read FOnSetValue write FOnSetValue;
property OnGetText: TdfOnTextEvent read FOnGetText write FOnGetText;
property OnSetText: TdfOnTextEvent read FOnSetText write FOnSetText;
property OnGetCount: TdfOnCountEvent read FOnGetCount write FOnGetCount;
property OnSetCount: TdfOnCountEvent read FOnSetCount write FOnSetCount;
property OnLinksTo: TdfOnLinksToEvent read FOnLinksTo write FOnLinksTo;
end;
TdfElement = class
private
FDef: TdfDef;
FState: TdfDataStates;
FParent: TdfElement;
FUserData: Integer;
protected
function GetDef: TdfDef; virtual;
function GetName: string; virtual;
function GetNameHash: Cardinal;
function GetDataType: TdfDataType;
function GetDefaultDataSize: integer; virtual;
function GetCount: Integer; virtual;
procedure SetCount(NewCount: Integer); virtual;
function Get(Index: Integer): TdfElement; virtual;
procedure Put(Index: Integer; const aElement: TdfElement); virtual;
function GetEnabled: Boolean;
procedure SetEnabled(aEnabled: Boolean);
function GetInitialized: Boolean;
function GetNativeValue: Variant; virtual;
procedure SetNativeValue(const aValue: Variant); virtual;
function GetEditValue: string; virtual;
procedure SetEditValue(const aValue: string); virtual;
function GetNativeValues(const aPath: string): Variant; virtual;
procedure SetNativeValues(const aPath: string; const aValue: Variant); virtual;
function GetEditValues(const aPath: string): string; virtual;
procedure SetEditValues(const aPath: string; const aValue: string); virtual;
function EnabledElementByPath(const aPath: string): TdfElement;
function ActiveIndex: Integer; // for Unions
public
constructor Create(const aDef: TdfDef; const aParent: TdfElement); virtual;
destructor Destroy; override;
procedure DoException(const aMessage: string);
function ValidateData(const aDataStart, aDataEnd: Pointer; aSize: Integer): Boolean;
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; virtual;
function Serialize(const aDataStart, aDataEnd: Pointer): Integer; virtual;
procedure UnSerializeFromJSON(const aJSON: TJSONBaseObject); virtual;
procedure SerializeToJSON(const aJSON: TJSONBaseObject); virtual;
procedure LoadFromData(const aData: TBytes); virtual;
procedure LoadFromFile(const aFileName: string);
procedure LoadFromJSONFile(const aFileName: string);
procedure LoadFromResource(const aContainerName, aFileName: string); overload;
procedure LoadFromResource(const aFileName: string); overload;
procedure SaveToData(var aData: TBytes); virtual;
procedure SaveToFile(const aFileName: string);
procedure SaveToJSONFile(const aFileName: string; aCompact: Boolean);
procedure SetToDefault;
procedure Assign(const aElement: TdfElement); virtual;
function ToJSON(aCompact: Boolean): string; virtual;
procedure FromJSON(const aText: string); virtual;
function ToText(aIdent: Integer = 0): string; virtual;
function Updating: Boolean; virtual;
procedure BeginUpdate;
procedure EndUpdate;
function DataSize: Integer; virtual;
function Path: string;
function Root: TdfElement;
function Add: TdfElement; virtual;
procedure Delete(Index: Integer); virtual;
procedure Remove; virtual;
procedure Move(CurIndex, NewIndex: Integer); virtual;
function Index: Integer; virtual;
function IndexOf(aElement: TdfElement): Integer; virtual;
function LinksTo: TdfElement; virtual;
function ElementByName(const aName: string; aEnabledOnly: Boolean = True): TdfElement; virtual;
function ElementByPath(const aPath: string; aEnabledOnly: Boolean = True): TdfElement; virtual;
property Def: TdfDef read GetDef;// write FDef;
property Parent: TdfElement read FParent write FParent;
property Name: string read GetName;
property NameHash: Cardinal read GetNameHash;
property DataType: TdfDataType read GetDataType;
property DataState: TdfDataStates read FState;
property Enabled: Boolean read GetEnabled write SetEnabled;
property Initialized: Boolean read GetInitialized;
property Count: Integer read GetCount write SetCount;
property NativeValue: Variant read GetNativeValue write SetNativeValue;
property NativeValues[const aPath: string]: Variant read GetNativeValues write SetNativeValues;
property EditValue: string read GetEditValue write SetEditValue;
property EditValues[const aPath: string]: string read GetEditValues write SetEditValues;
property Items[Index: Integer]: TdfElement read Get; default;
property Elements[const aPath: string]: TdfElement read EnabledElementByPath;
property UserData: Integer read FUserData write FUserData;
end;
{ Generic value }
TdfValueDef = class(TdfDef);
TdfValue = class(TdfElement)
private
FValue: array [0..dfEmbeddedValueSize-1] of Byte;
FDataStart: PByte;
FDataEnd: PByte;
protected
function GetNativeValue: Variant; override;
procedure SetNativeValue(const aValue: Variant); override;
function GetEditValue: string; override;
procedure SetEditValue(const aValue: string); override;
public
procedure AllocateValue(var aDataStart, aDataEnd: PByte; aLength: Integer); overload;
procedure AllocateValue(aLength: Integer); overload;
destructor Destroy; override;
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
function Serialize(const aDataStart, aDataEnd: Pointer): Integer; override;
procedure UnSerializeFromJSON(const aJSON: TJSONBaseObject); override;
procedure SerializeToJSON(const aJSON: TJSONBaseObject); override;
procedure Assign(const aElement: TdfElement); override;
function DataSize: Integer; override;
end;
{ Generic container }
TdfContainer = class(TdfElement)
private
FElements: TdfElements;
FCount: Integer;
protected
procedure Clear;
function GetCapacity: Integer;
procedure SetCapacity(NewCapacity: Integer);
function GetCount: Integer; override;
procedure SetCount(NewCount: Integer); override;
function Get(Index: Integer): TdfElement; override;
procedure Put(Index: Integer; const aElement: TdfElement); override;
public
destructor Destroy; override;
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
function Serialize(const aDataStart, aDataEnd: Pointer): Integer; override;
function DataSize: integer; override;
procedure Delete(Index: Integer); override;
procedure Move(CurIndex, NewIndex: Integer); override;
function IndexOf(aElement: TdfElement): integer; override;
function ElementByName(const aName: string; aEnabledOnly: Boolean = True): TdfElement; override;
property Capacity: Integer read GetCapacity write SetCapacity;
end;
{ Structure }
TdfStructDef = class(TdfDef)
public
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
end;
TdfStruct = class(TdfContainer)
protected
procedure SetCount(NewCount: Integer); override; // exception
public
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
procedure UnSerializeFromJSON(const aJSON: TJSONBaseObject); override;
procedure SerializeToJSON(const aJSON: TJSONBaseObject); override;
procedure Assign(const aElement: TdfElement); override;
procedure Delete(Index: Integer); override; // exception
procedure Move(CurIndex, NewIndex: Integer); override; // exception
end;
{ Array }
TdfArrayDef = class(TdfDef)
private
FCounter: string;
public
function Clone: TdfDef; override;
procedure Assign(const aDef: TdfDef); override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
property Counter: string read FCounter write FCounter;
end;
TdfArray = class(TdfContainer)
protected
function GetExternalCount: Integer;
procedure SetExternalCount(NewCount: Integer);
procedure SetCount(NewCount: Integer); override;
public
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
function Serialize(const aDataStart, aDataEnd: Pointer): Integer; override;
procedure UnSerializeFromJSON(const aJSON: TJSONBaseObject); override;
procedure SerializeToJSON(const aJSON: TJSONBaseObject); override;
procedure Assign(const aElement: TdfElement); override;
function DataSize: integer; override;
function Add: TdfElement; override;
procedure Delete(Index: Integer); override;
end;
{ Union - several different size values but only one is active chosen by decider callack }
TdfUnionDef = class(TdfValueDef)
public
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
end;
TdfUnion = class(TdfContainer)
protected
function GetDef: TdfDef; override;
function GetCount: Integer; override; // always 0
procedure SetCount(NewCount: Integer); override; // do nothing
// redirect to the active element
function GetNativeValue: Variant; override;
procedure SetNativeValue(const aValue: Variant); override;
function GetEditValue: string; override;
procedure SetEditValue(const aValue: string); override;
function GetNativeValues(const aPath: string): Variant; override;
procedure SetNativeValues(const aPath: string; const aValue: Variant); override;
function GetEditValues(const aPath: string): string; override;
procedure SetEditValues(const aPath: string; const aValue: string); override;
public
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
function Serialize(const aDataStart, aDataEnd: Pointer): Integer; override;
procedure UnSerializeFromJSON(const aJSON: TJSONBaseObject); override;
procedure SerializeToJSON(const aJSON: TJSONBaseObject); override;
procedure Assign(const aElement: TdfElement); override;
function DataSize: Integer; override;
end;
{
Value Union - same size value but different definitions chosen in OnGetDef by decider callback
Do not use with flags, no access to individual flags by name, only as a whole value
}
TdfValueUnionDef = class(TdfValueDef)
public
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
end;
TdfValueUnion = class(TdfValue)
protected
function GetDef: TdfDef; override;
end;
{
Merge - several fixed size values are treated as a single element
Native Value is an array of bytes
Edit Value consists of delimited individual values
Each value can be accessed by name 'X' or index '0'
}
TdfMergeDef = class(TdfValueDef)
private
// offset and size of each value
FOffsets: array of record
Offset: Integer;
DataSize: Integer;
end;
FDelimiter: string;
procedure UpdateOffsets;
protected
function GetDefaultDataSize: Integer; override;
function GetValueOffset(aIndex: Integer): Integer;
function GetValueDataSize(aIndex: Integer): Integer;
public
constructor Create(const aName: string; aDataType: TdfDataType; const aDefs: array of TdfDef);
function Clone: TdfDef; override;
procedure Assign(const aDef: TdfDef); override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
procedure GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
property Delimiter: string read FDelimiter write FDelimiter;
property ValueOffset[Index: Integer]: Integer read GetValueOffset;
property ValueDataSize[Index: Integer]: Integer read GetValueDataSize;
end;
TdfMerge = class(TdfValue)
// disable looping callback check
function Updating: Boolean; override;
// apply default values of individual elements
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
// override to access by name or index as a virtual child element
function GetNativeValues(const aPath: string): Variant; override;
procedure SetNativeValues(const aPath: string; const aValue: Variant); override;
function GetEditValues(const aPath: string): string; override;
procedure SetEditValues(const aPath: string; const aValue: string); override;
end;
{ Integer }
TdfIntegerDef = class(TdfValueDef)
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
procedure GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
end;
TdfInteger = class(TdfValue);
{ Mapped Integer: flags, enums }
TMappedValue = record
Key: Int64;
Value: String;
end;
TdfMappedIntegerDef = class(TdfIntegerDef)
private
FValuesMap: array of TMappedValue;
function GetValuesMapCount: Integer;
function IndexOfKey(const aKey: Int64): integer;
function IndexOfValue(const aValue: string): integer;
function GetKey(Index: integer): Int64;
function GetValue(Index: integer): string;
function GetValueByKey(Key: Int64): string;
public
function Clone: TdfDef; override;
procedure Assign(const aDef: TdfDef); override;
procedure AssignValuesMap(const aValuesMap: array of const); virtual;
property ValuesMapCount: Integer read GetValuesMapCount;
property Keys[Index: integer]: Int64 read GetKey;
property Values[Index: integer]: string read GetValue;
property KeyValues[Key: Int64]: string read GetValueByKey;
end;
{ Flags }
TdfFlagsDef = class(TdfMappedIntegerDef)
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
procedure AssignValuesMap(const aValuesMap: array of const); override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
end;
TdfFlags = class(TdfInteger)
protected
// override to access by flag name as a virtual child element
function GetNativeValues(const aPath: string): Variant; override;
procedure SetNativeValues(const aPath: string; const aValue: Variant); override;
function GetEditValues(const aPath: string): string; override;
procedure SetEditValues(const aPath: string; const aValue: string); override;
end;
{ Enum }
TdfEnumDef = class(TdfMappedIntegerDef)
function CreateElement(const aParent: TdfElement): TdfElement; override;
function Clone: TdfDef; override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
end;
TdfEnum = class(TdfInteger);
{ Float }
TdfFloatDef = class(TdfValueDef)
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
procedure GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
end;
TdfFloat = class(TdfValue);
{ Bytes }
TdfBytesDef = class(TdfValueDef)
protected
function GetDefaultDataSize: integer; override;
public
function Clone: TdfDef; override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
procedure GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
end;
TdfBytes = class(TdfValue)
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
end;
{ Chars }
TdfCharsDef = class(TdfValueDef)
private
FTerminator: AnsiChar;
FTerminated: Boolean;
protected
function GetDefaultDataSize: integer; override;
public
function Clone: TdfDef; override;
procedure Assign(const aDef: TdfDef); override;
function CreateElement(const aParent: TdfElement): TdfElement; override;
procedure GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant); override;
procedure GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
procedure SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string); override;
property Terminator: AnsiChar read FTerminator write FTerminator;
property Terminated: Boolean read FTerminated write FTerminated;
end;
TdfChars = class(TdfValue)
function UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer; override;
function ReadChars(const aDataStart, aDataEnd: Pointer; var aString: AnsiString): Integer;
procedure WriteChars(const aString: AnsiString);
end;
function dfFloatToStr(const aFloat: Extended): string;
function dfStrToFloat(const aValue: string): Extended;
function dfCalcHash(const s: string): Cardinal;
function dfStruct(
const aName: string;
const aDefs: array of TdfDef;
const aEvents: array of const
): TdfStructDef; overload;
function dfStruct(const aName: string; const aDefs: array of TdfDef): TdfStructDef; overload;
function dfArray(
const aName: string;
const aMemberDef: TdfDef;
aSize: integer;
const aCounter: string;
const aEvents: array of const
): TdfArrayDef; overload;
function dfArray(const aName: string; const aMemberDef: TdfDef; aSize: integer): TdfArrayDef; overload;
function dfArray(const aName: string; const aMemberDef: TdfDef; const aCounter: string): TdfArrayDef; overload;
function dfUnion(
aDecider: TdfOnDecideEvent;
const aDefs: array of TdfDef;
const aEvents: array of const
): TdfUnionDef; overload;
function dfUnion(const aDefs: array of TdfDef; const aEvents: array of const): TdfUnionDef; overload;
function dfUnion(aDecider: TdfOnDecideEvent; const aDefs: array of TdfDef): TdfUnionDef; overload;
function dfValueUnion(
aDataType: TdfDataType;
aDecider: TdfOnDecideEvent;
const aDefs: array of TdfDef;
const aEvents: array of const
): TdfValueUnionDef; overload;
function dfValueUnion(aDataType: TdfDataType; aDecider: TdfOnDecideEvent; const aDefs: array of TdfDef): TdfValueUnionDef; overload;
function dfMerge(
const aName: string;
const aDefs: array of TdfDef;
const aDefaultValue: string;
const aEvents: array of const
): TdfMergeDef; overload;
function dfMerge(const aName: string; const aDefs: array of TdfDef; const aEvents: array of const): TdfMergeDef; overload;
function dfMerge(const aName: string; const aDefs: array of TdfDef): TdfMergeDef; overload;
function dfInteger(
const aName: string;
aDataType: TdfDataType;
const aDefaultValue: string;
const aEvents: array of const
): TdfIntegerDef; overload;
function dfInteger(const aName: string; aDataType: TdfDataType; const aDefaultValue: string): TdfIntegerDef; overload;
function dfInteger(const aName: string; aDataType: TdfDataType; const aEvents: array of const): TdfIntegerDef; overload;
function dfInteger(const aName: string; aDataType: TdfDataType): TdfIntegerDef; overload;
function dfHexInteger(const aName: string; aDataType: TdfDataType): TdfDef;
function dfFlags(
const aName: string;
aDataType: TdfDataType;
const aFlags: array of const;
const aDefaultValue: string;
const aEvents: array of const
): TdfFlagsDef; overload;
function dfFlags(const aName: string; aDataType: TdfDataType; const aFlags: array of const): TdfFlagsDef; overload;
function dfEnum(
const aName: string;
aDataType: TdfDataType;
const aValues: array of const;
const aDefaultValue: string;
const aEvents: array of const
): TdfEnumDef; overload;
function dfEnum(const aName: string; aDataType: TdfDataType; const aValues: array of const): TdfEnumDef; overload;
function dfBool(const aName: string; aDataType: TdfDataType; const aDefaultValue: string; const aEvents: array of const): TdfEnumDef; overload;
function dfBool(const aName: string; aDataType: TdfDataType; const aDefaultValue: string): TdfEnumDef; overload;
function dfBool(const aName: string; aDataType: TdfDataType; const aEvents: array of const): TdfEnumDef; overload;
function dfBool(const aName: string; aDataType: TdfDataType): TdfEnumDef; overload;
function dfFloat(
const aName: string;
aDataType: TdfDataType;
const aDefaultValue: string;
const aEvents: array of const
): TdfFloatDef; overload;
function dfFloat(const aName: string; aDataType: TdfDataType): TdfFloatDef; overload;
function dfFloat(const aName: string; const aDefaultValue: string; const aEvents: array of const): TdfFloatDef; overload;
function dfFloat(const aName: string; const aEvents: array of const): TdfFloatDef; overload;
function dfFloat(const aName: string; const aDefaultValue: string): TdfFloatDef; overload;
function dfFloat(const aName: string): TdfFloatDef; overload;
function dfBytes(
const aName: string;
aSize: integer;
const aEvents: array of const
): TdfBytesDef; overload;
function dfBytes(const aName: string; aSize: integer): TdfBytesDef; overload;
function dfChars(
const aName: string;
aSize: integer;
const aDefaultValue: string;
aTerminator: AnsiChar;
aTerminated: Boolean;
const aEvents: array of const
): TdfCharsDef;
implementation
uses
wbHalfFloat;
const
SingleNaN : Single = 0.0/0.0;
DoubleNaN : Double = 0.0/0.0;
SingleInf : Single = 1.0/0.0;
DoubleInf : Double = 1.0/0.0;
function DoSingleSameValue(const A, B: Single): Boolean;
const
SingleResolution : Single = 0.000000499999999999999999999;
begin
Result := Abs(A - B) <= Max(Min(Abs(A), Abs(B)) * SingleResolution, SingleResolution)
end;
function SingleSameValue(const A, B: Extended): Boolean;
var
sA, sB: Single;
begin
sA := A;
sB := B;
Result := DoSingleSameValue(sA, sB);
end;
function IsNegZeroString(const aValue: string): Boolean;
var
i: Integer;
begin
Result := False;
if not ( (Length(aValue) >= 2) and (aValue[1] = '-') ) then
Exit;
for i := 2 to Length(aValue) do
if not CharInSet(aValue[i], ['.', '0']) then
Exit;
Result := True;
end;
function dfFloatToStr(const aFloat: Extended): string;// inline;
var
S: Single;
begin
S := aFloat;
if PCardinal(@S)^ = $80000000 then
Result := '-' + FloatToStrF(0.0, ffFixed, 99, dfFloatDecimalDigits)
else
Result := FloatToStrF(aFloat, ffFixed, 99, dfFloatDecimalDigits);
end;
function dfStrToFloat(const aValue: string): Extended;
begin
if SameText(aValue, 'NaN') then
Result := SingleNaN
else if SameText(aValue, 'Inf') then
Result := SingleInf
else if SameText(aValue, 'Max') then
Result := MaxSingle
else if SameText(aValue, 'Min') then
Result := -MaxSingle
else if IsNegZeroString(aValue) then
Result := -0.0
else if aValue = '' then
Result := 0.0
else
Result := StrToFloat(aValue);
end;
function dfStrToHalfFloat(const aValue: string): Extended;
begin
if SameText(aValue, 'NaN') then
Result := HalfToFloat(HalfNaN)
else if SameText(aValue, 'Inf') then
Result := HalfToFloat(HalfPosInf)
else if SameText(aValue, 'Max') then
Result := MaxHalf
else if SameText(aValue, 'Min') then
Result := -MaxHalf
else if IsNegZeroString(aValue) then
Result := -0.0
else if aValue = '' then
Result := 0.0
else
Result := StrToFloat(aValue);
end;
function dfCalcHash(const s: string): Cardinal; inline;
begin
Result := HashName(PAnsiChar(AnsiString(s)));
end;
{ TdfDef }
constructor TdfDef.Create(const aName: string; aDataType: TdfDataType; const aDefs: array of TdfDef);
var
i: integer;
begin
FName := aName;
FNameHash := CalcHash(aName);
FDataType := aDataType;
if Length(aDefs) > 0 then begin
SetLength(FDefs, Length(aDefs));
for i := Low(aDefs) to High(aDefs) do
FDefs[i] := aDefs[i];
end;
end;
destructor TdfDef.Destroy;
var
i: integer;
begin
for i := Low(FDefs) to High(FDefs) do
FDefs[i].Free;
inherited;
end;
function TdfDef.CalcHash(const s: string): Cardinal;
begin
Result := dfCalcHash(s);
end;
procedure TdfDef.Assign(const aDef: TdfDef);
var
i: integer;
begin
FSize := aDef.Size;
FDefaultValue := aDef.DefaultValue;
SetLength(FDefs, Length(aDef.Defs));
for i := Low(FDefs) to High(FDefs) do
FDefs[i] := aDef.Defs[i].Clone;
FOnCreate := aDef.OnCreate;
FOnDestroy := aDef.OnDestroy;
FOnGetEnabled := aDef.OnGetEnabled;
FOnDecide := aDef.OnDecide;
FOnAfterLoad := aDef.OnAfterLoad;
FOnBeforeSave := aDef.OnBeforeSave;
FOnGetValue := aDef.OnGetValue;
FOnSetValue := aDef.OnSetValue;
FOnGetText := aDef.OnGetText;
FOnSetText := aDef.OnSetText;
FOnGetCount := aDef.OnGetCount;
FOnSetCount := aDef.OnSetCount;
FOnLinksTo := aDef.OnLinksTo;
end;
procedure TdfDef.AssignEvents(const aEvents: array of const);
var
i, ev: integer;
P: Pointer;
begin
Assert(Length(aEvents) mod 2 = 0);
for i := Low(aEvents) to High(aEvents) do begin
if aEvents[i].VType <> vtInteger then
Continue;
Assert(aEvents[Succ(i)].VType = vtPointer);
ev := aEvents[i].VInteger;
P := aEvents[Succ(i)].VPointer;
case ev of
DF_OnCreate : FOnCreate := P;
DF_OnDestroy : FOnDestroy := P;
DF_OnGetEnabled : FOnGetEnabled := P;
DF_OnDecide : FOnDecide := P;
DF_OnAfterLoad : FOnAfterLoad := P;
DF_OnBeforeSave : FOnBeforeSave := P;
DF_OnGetValue : FOnGetValue := P;
DF_OnSetValue : FOnSetValue := P;
DF_OnGetText : FOnGetText := P;
DF_OnSetText : FOnSetText := P;
DF_OnGetCount : FOnGetCount := P;
DF_OnSetCount : FOnSetCount := P;
DF_OnLinksTo : FOnLinksTo := P;
end;
end;
end;
function TdfDef.GetDefaultDataSize: integer;
begin
if FSize >= 0 then
Result := DefSizes[FDataType]
else
Result := -FSize;
end;
function TdfDef.CreateElement(const aParent: TdfElement): TdfElement;
begin
Result := TdfElement.Create(Self, aParent);
end;
procedure TdfDef.GetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant);
begin
if Assigned(FOnGetValue) and not aElement.Updating then begin
aElement.BeginUpdate;
try
FOnGetValue(aElement, aValue);
finally
aElement.EndUpdate;
end;
end;
end;
procedure TdfDef.SetElementNativeValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: Variant);
begin
if Assigned(FOnSetValue) and not aElement.Updating then begin
aElement.BeginUpdate;
try
FOnSetValue(aElement, aValue);
finally
aElement.EndUpdate;
end;
end;
end;
procedure TdfDef.GetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string);
begin
if Assigned(FOnGetText) and not aElement.Updating then begin
aElement.BeginUpdate;
try
FOnGetText(aElement, aValue);
finally
aElement.EndUpdate;
end;
end;
end;
procedure TdfDef.SetElementEditValue(const aElement: TdfElement; aDataStart, aDataEnd: PByte; var aValue: string);
begin
if Assigned(FOnSetText) and not aElement.Updating then begin
aElement.BeginUpdate;
try
FOnSetText(aElement, aValue);
finally
aElement.EndUpdate;
end;
end;
end;
procedure TdfDef.AddDef(const aDef: TdfDef);
begin
SetLength(FDefs, Succ(Length(FDefs)));
FDefs[Pred(Length(FDefs))] := aDef;
end;
procedure TdfDef.InsertDefsFrom(const aDef: TdfDef; Index: Integer);
var
i: integer;
begin
if Length(aDef.Defs) = 0 then
Exit;
if Length(FDefs) = 0 then
Index := 0
else if (Index < Low(FDefs)) or (Index > High(FDefs)) then
raise Exception.Create('Invalid index to insert defs');
SetLength(FDefs, Length(FDefs) + Length(aDef.Defs));
Move(FDefs[Index], FDefs[Index + Length(aDef.Defs)], SizeOf(Pointer) * (Length(FDefs) - Length(aDef.Defs) - Index));
for i := Low(aDef.Defs) to High(aDef.Defs) do
FDefs[Index + i] := aDef.Defs[i].Clone;
end;
{ TdfElement }
constructor TdfElement.Create(const aDef: TdfDef; const aParent: TdfElement);
begin
FDef := aDef;
FParent := aParent;
Include(FState, dsEnabled);
if Assigned(FDef.OnCreate) then
FDef.OnCreate(Self);
end;
destructor TdfElement.Destroy;
begin
Include(FState, dsDestroying);
// check FDef in case if exception occured in constructor and FDef is not set yet
if Assigned(FDef) and Assigned(FDef.OnDestroy) then
FDef.OnDestroy(Self);
end;
procedure TdfElement.DoException(const aMessage: string);
begin
raise Exception.Create('Error in "' + Self.Path + '": ' + aMessage);
end;
function TdfElement.ValidateData(const aDataStart, aDataEnd: Pointer; aSize: Integer): Boolean;
var
i: integer;
begin
Result := True;
if aDataStart <> nil then begin
i := PByte(aDataEnd) - PByte(aDataStart);
if aSize > i then begin
DoException(Format('Unexpected end of stream: need %d bytes, available %d', [aSize, i]));
Result := False;
end;
end;
end;
function TdfElement.UnSerialize(const aDataStart, aDataEnd: Pointer; const aDataSize: Integer): Integer;
begin
Result := 0;
Include(FState, dsInitialized);
if Assigned(FDef.OnAfterLoad) then
FDef.OnAfterLoad(Self, aDataStart, aDataSize);
end;
function TdfElement.Serialize(const aDataStart, aDataEnd: Pointer): Integer;
begin
Result := 0;
end;