jsondoc.pas
jsondoc.pas
功能：bson序列、还原
开源地址：
https://github.com/stijnsanders/TMongoWire
编程接口：
1 2 3 4 5 6 7 8 9 10 11 12 13 | IJSONDocument = interface(IUnknown) ['{4A534F4E-0001-0001-C000-000000000001}'] function Get_Item(const Key: WideString): Variant; stdcall; procedure Set_Item(const Key: WideString; const Value: Variant); stdcall; procedure Parse(const JSONData: WideString); stdcall; function ToString: WideString; stdcall; function ToVarArray: Variant; stdcall; procedure Clear; stdcall; procedure Delete(const Key: WideString); stdcall; property Item[const Key: WideString]: Variant read Get_Item write Set_Item; default; property AsString: WideString read ToString write Parse;end; |
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2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 | {jsonDoc.pasCopyright 2015-2019 Stijn SandersMade available under terms described in file "LICENSE"https://github.com/stijnsanders/jsonDocv1.2.0}unit jsonDoc;{$WARN SYMBOL_PLATFORM OFF}{$D-}{$L-}{Options:Define here or in the project settings JSONDOC_JSON_STRICT to disallow missing quotes around key names JSONDOC_JSON_LOOSE to allow missing colons and comma's JSONDOC_JSON_PASCAL_STRINGS to allow pascal-style strings JSONDOC_P2 to combine JSONDOC_JSON_LOOSE and JSONDOC_JSON_PASCAL_STRINGS JSONDOC_STOREINDENTING to make ToString write indentation EOL's and tabs JSONDOC_THREADSAFE to make IJSONDocument instances thread-safe JSONDOC_DEFAULT_USE_IJSONARRAY to set JSON_UseIJSONArray to true by default}interfaceuses SysUtils;const //COM GUID's IID_IJSONDocument : TGUID = '{4A534F4E-0001-0001-C000-000000000001}'; CLASS_JSONDocument : TGUID = '{4A534F4E-0001-0002-C000-000000000002}'; IID_IJSONEnumerator : TGUID = '{4A534F4E-0001-0003-C000-000000000003}'; IID_IJSONEnumerable : TGUID = '{4A534F4E-0001-0004-C000-000000000004}'; IID_IJSONArray : TGUID = '{4A534F4E-0001-0005-C000-000000000005}'; IID_IJSONDocArray : TGUID = '{4A534F4E-0001-0006-C000-000000000006}'; IID_IJSONDocWithReUse : TGUID = '{4A534F4E-0001-0007-C000-000000000007}';type{ IJSONDocument interface the base JSON document interface that provides access to a set of key-value pairs. use AsString and Parse to convert JSON to and from string values. use AsVarArray to access the key-value pairs as a [x,2] variant array. use Clear to re-use a JSON doc for parsing or building a new similar document and keep the allocated memory for keys and values. see also: JSON function} IJSONDocument = interface(IUnknown) ['{4A534F4E-0001-0001-C000-000000000001}'] function Get_Item(const Key: WideString): Variant; stdcall; procedure Set_Item(const Key: WideString; const Value: Variant); stdcall; procedure Parse(const JSONData: WideString); stdcall; function ToString: WideString; stdcall; function ToVarArray: Variant; stdcall; procedure Clear; stdcall; procedure Delete(const Key: WideString); stdcall; property Item[const Key: WideString]: Variant read Get_Item write Set_Item; default; property AsString: WideString read ToString write Parse; end;{ IJSONEnumerator interface use IJSONEnumerator to enumerate a document's key-value pairs see also: JSONEnum function} //TODO: IEnumVariant? IJSONEnumerator = interface(IUnknown) ['{4A534F4E-0001-0003-C000-000000000003}'] function EOF: boolean; stdcall; function Next: boolean; stdcall; function Get_Key: WideString; stdcall; function Get_Value: Variant; stdcall; procedure Set_Value(const Value: Variant); stdcall; function v0: pointer; stdcall; property Key: WideString read Get_Key; property Value: Variant read Get_Value write Set_Value; end;{ IJSONEnumerable interface used to get a IJSONEnumerable instance for a document see also: JSONEnum function} IJSONEnumerable = interface(IUnknown) ['{4A534F4E-0001-0004-C000-000000000004}'] function NewEnumerator: IJSONEnumerator; stdcall; end;{ IJSONArray interface When using VarArrayOf (declared in Variants.pas), a SafeArray is used internally for storage, but as a variant value VarCopy is called with each use, creating duplicate (deep) copies of the SafeArray. Use IJSONArray (and the ja function) to create a IJSONArray instance that uses a single copy of the data. It is also reference counted, which automates memory clean-up.} IJSONArray = interface(IUnknown) ['{4A534F4E-0001-0005-C000-000000000005}'] function Get_Item(Index: integer): Variant; stdcall; procedure Set_Item(Index: integer; const Value: Variant); stdcall; function Count: integer; stdcall; function ToString: WideString; stdcall; function v0(Index: integer): pointer; stdcall; property Item[Idx: integer]: Variant read Get_Item write Set_Item; default; end;{ IJSONDocArray interface use IJSONDocArray to build an array of similar documents, ideally in combination with a single IJSONDocument instance and IJSONDocument.Clear to re-use the memory allocated for keys and values see also: JSONDocArr function} IJSONDocArray = interface(IJSONArray) ['{4A534F4E-0001-0006-C000-000000000006}'] function Add(const Doc: IJSONDocument): integer; stdcall; function AddJSON(const Data: WideString): integer; stdcall; procedure LoadItem(Index: integer; const Doc: IJSONDocument); stdcall; procedure Clear; stdcall; function GetJSON(Index: integer): WideString; stdcall; end;{ IJSONDocWithReUse interface used internally to enable re-use of allocated keys see also: TJSONDocument Parse and Clear} IJSONDocWithReUse = interface(IUnknown) ['{4A534F4E-0001-0007-C000-000000000007}'] function ReUse(const Key: WideString): Variant; stdcall; end;{ JSON function: JSON document factory call JSON without parameters do create a new blank document}function JSON: IJSONDocument; overload;{ JSON function: JSON document builder pass an array of alternately keys and values, suffix key with opening brace to start an embedded document, and key of a single closing brace to close it.}function JSON(const x: array of Variant): IJSONDocument; overload;{ JSON function: JSON document converter pass a single variant to have it converted to an IJSONDocument interface or a string with JSON parsed into a IJSONDocument or nil when VarIsNull}function JSON(const x: Variant): IJSONDocument; overload;{ JSONEnum function get a new enumerator to enumeratare the key-value pairs in the document}function JSONEnum(const x: IJSONDocument): IJSONEnumerator; overload; //inline;function JSONEnum(const x: Variant): IJSONEnumerator; overload;function JSON(const x: IJSONEnumerator): IJSONDocument; overload; //inline;function JSONEnum(const x: IJSONEnumerator): IJSONEnumerator; overload; //inline;{ ja function create and populate a new IJSONArray instance or cast a Variant holding a JSONArray instance to the interface reference}function ja(const Items:array of Variant): IJSONArray; overload;function ja(const Item:Variant): IJSONArray; overload;{ JSONDocArray function get a new IJSONDocArray instance}function JSONDocArray: IJSONDocArray; overload;function JSONDocArray(const Items:array of IJSONDocument): IJSONDocArray; overload;{ JSON_UseIJSONArray switch JSON so it will create IJSONArray instances to hold arrays of values instead of VarArrayCreate, default false see also TJSONDocument.UseIJSONArray property}var JSON_UseIJSONArray: boolean;{ TJSONImplBaseObj common base object JSON implementation objects inherit don't use directly}type{$IFDEF JSONDOC_THREADSAFE} TJSONImplBaseObj = class(TInterfacedObject) protected FLock:TRTLCriticalSection; public procedure AfterConstruction; override; destructor Destroy; override; end;{$ELSE} //thread-unsafe anyway, so avoid locking when reference counting: TJSONImplBaseObj = class(TObject, IInterface) protected FRefCount: Integer; function QueryInterface(const IID: TGUID; out Obj): HResult; stdcall; function _AddRef: Integer; stdcall; function _Release: Integer; stdcall; public procedure AfterConstruction; override; procedure BeforeDestruction; override; class function NewInstance: TObject; override; property RefCount: Integer read FRefCount; end;{$ENDIF}{ TJSONDocument class the default IJSONDocument implementation see also: JSON function} TJSONDocument = class(TJSONImplBaseObj, IJSONDocument, IJSONEnumerable, IJSONDocWithReUse) private FElementIndex,FElementSize:integer; FElements:array of record SortIndex,LoadIndex:integer; Key:WideString; Value:Variant; end; FLoadIndex:integer; {$IFNDEF JSONDOC_THREADSAFE} FGotIndex,FGotSorted:integer; FGotMatch:boolean; {$ENDIF} FUseIJSONArray:boolean; function GetKeyIndex(const Key: WideString; var GotIndex: integer; var GotSorted: integer): boolean; protected function Get_Item(const Key: WideString): Variant; stdcall; procedure Set_Item(const Key: WideString; const Value: Variant); stdcall; function ReUse(const Key: WideString): Variant; stdcall; public procedure AfterConstruction; override; destructor Destroy; override; procedure Parse(const JSONData: WideString); stdcall; function JSONToString: WideString; stdcall; function IJSONDocument.ToString=JSONToString; function ToVarArray: Variant; stdcall; procedure Clear; stdcall; function NewEnumerator: IJSONEnumerator; stdcall; procedure Delete(const Key: WideString); stdcall; property Item[const Key: WideString]: Variant read Get_Item write Set_Item; default; property AsString: WideString read JSONToString write Parse; property UseIJSONArray:boolean read FUseIJSONArray write FUseIJSONArray; end;{ TJSONEnumerator class the default IJSONEnumerator implementation see also: JSONEnum function} TJSONEnumerator = class(TJSONImplBaseObj, IJSONEnumerator) private FData:TJSONDocument; FIndex: integer; public constructor Create(Data: TJSONDocument); destructor Destroy; override; function EOF: boolean; stdcall; function Next: boolean; stdcall; function Get_Key: WideString; stdcall; function Get_Value: Variant; stdcall; procedure Set_Value(const Value: Variant); stdcall; function v0: pointer; stdcall; end;{ TJSONArray class Default ILightArray implementation} TJSONArray = class(TJSONImplBaseObj, IJSONArray, IJSONEnumerable) private FData:array of Variant; protected function Get_Item(Index: integer): Variant; stdcall; procedure Set_Item(Index: integer; const Value: Variant); stdcall; function Count: integer; stdcall; function JSONToString: WideString; stdcall; function IJSONArray.ToString=JSONToString; function v0(Index: integer): pointer; stdcall; function NewEnumerator: IJSONEnumerator; stdcall; public constructor Create(Size: integer); end;{ TJSONArrayEnumerator an IJSONEnumerator implementation that iterates over a variant array used internally to convert to JSON} TJSONArrayEnumerator= class(TJSONImplBaseObj, IJSONEnumerator) private FData:IJSONArray; FIndex,FMax:integer; public constructor Create(const Data:IJSONArray); destructor Destroy; override; function EOF: boolean; stdcall; function Next: boolean; stdcall; function Get_Key: WideString; stdcall; function Get_Value: Variant; stdcall; procedure Set_Value(const Value: Variant); stdcall; function v0: pointer; stdcall; end;{ TJSONDocArray class the default IJSONDocArray implementation see also: JSONDocArray function} TJSONDocArray = class(TJSONImplBaseObj, IJSONArray, IJSONDocArray) private FItems:array of WideString; FItemsCount,FItemsSize,FCurrentIndex:integer; FCurrent:Variant; protected //IJSONArray function Get_Item(Index: integer): Variant; stdcall; procedure Set_Item(Index: integer; const Value: Variant); stdcall; function Count: integer; stdcall; function JSONToString: WideString; stdcall; function IJSONArray.ToString=JSONToString; function v0(Index: integer): pointer; stdcall; //function IJSONArray.ToString=JSONToString; //IJSONDocArray function Add(const Doc: IJSONDocument): integer; stdcall; function AddJSON(const Data: WideString): integer; stdcall; procedure LoadItem(Index: integer; const Doc: IJSONDocument); stdcall; function IJSONDocArray.ToString=JSONToString; procedure Clear; stdcall; function GetJSON(Index: integer): WideString; stdcall; public constructor Create; destructor Destroy; override; end;{ TVarArrayEnumerator an IJSONEnumerator implementation that iterates over a variant array used internally to convert to JSON} TVarArrayEnumerator = class(TJSONImplBaseObj, IJSONEnumerator) private FData:PVariant; FCurrent:Variant; FIndex,FMax,FCurrentIndex:integer; public constructor Create(const Data:PVariant); destructor Destroy; override; function EOF: boolean; stdcall; function Next: boolean; stdcall; function Get_Key: WideString; stdcall; function Get_Value: Variant; stdcall; procedure Set_Value(const Value: Variant); stdcall; function v0: pointer; stdcall; end;{ TVarJSONArray an IJSONArray implementation that works on an existing variant array used internally by the ja function} TVarJSONArray = class(TJSONImplBaseObj, IJSONArray) private FData,FCurrent:Variant; v1,v2,FCurrentIndex:integer; protected function Get_Item(Index: integer): Variant; stdcall; procedure Set_Item(Index: integer; const Value: Variant); stdcall; function Count: integer; stdcall; function JSONToString: WideString; stdcall; function IJSONArray.ToString=JSONToString; function v0(Index: integer): pointer; stdcall; public constructor Create(const Data: Variant); constructor CreateNoCopy(var Data: Variant); destructor Destroy; override; end;{ EJSONException class types exception types thrown from TJSONDocument's Parse and ToString} EJSONException=class(Exception); EJSONDecodeException=class(EJSONException); EJSONEncodeException=class(EJSONException);implementationuses Variants{, Windows}; //cxgprocedure VarMove(var Dest, Src: Variant);begin //Dest:=Src;VarClear(Src); Move(Src,Dest,SizeOf(TVarData)); FillChar(src, SizeOf(TVarData), 0); //cxg //ZeroMemory(@Src,SizeOf(TVarData));end;{ TJSONImplBaseObj }{$IFDEF JSONDOC_THREADSAFE}procedure TJSONImplBaseObj.AfterConstruction;begin inherited; InitializeCriticalSection(FLock);end;destructor TJSONImplBaseObj.Destroy;begin DeleteCriticalSection(FLock); inherited;end;{$ELSE}procedure TJSONImplBaseObj.AfterConstruction;begin inherited; dec(FRefCount);//see constructorend;procedure TJSONImplBaseObj.BeforeDestruction;begin inherited; if RefCount<>0 then System.Error(reInvalidPtr);end;class function TJSONImplBaseObj.NewInstance: TObject;begin Result:=inherited NewInstance; //see AfterConstruction, prevent detroy while creating TJSONImplBaseObj(Result).FRefCount:=1;end;function TJSONImplBaseObj.QueryInterface(const IID: TGUID; out Obj): HResult;begin if GetInterface(IID,Obj) then Result:=0 else Result:=E_NOINTERFACE;end;function TJSONImplBaseObj._AddRef: Integer;begin inc(FRefCount); Result:=FRefCount;end;function TJSONImplBaseObj._Release: Integer;begin dec(FRefCount); Result:=FRefCount; if Result=0 then Destroy;end;{$ENDIF}{ TJSONDocument }procedure TJSONDocument.AfterConstruction;begin inherited; FElementIndex:=0; FElementSize:=0; FLoadIndex:=0; {$IFNDEF JSONDOC_THREADSAFE} FGotIndex:=0; FGotSorted:=0; FGotMatch:=false; {$ENDIF} FUseIJSONArray:=JSON_UseIJSONArray;end;destructor TJSONDocument.Destroy;var i:integer;begin for i:=0 to FElementIndex-1 do VarClear(FElements[i].Value); inherited;end;function TJSONDocument.GetKeyIndex(const Key: WideString; var GotIndex: integer; var GotSorted: integer): boolean;var a,b,c,d,x:integer;begin //case sensitivity? {$IFNDEF JSONDOC_THREADSAFE} //check last getindex, speeds up set right after get if FGotMatch and (CompareStr(Key,FElements[FGotIndex].Key)=0) then begin //assert FGotIndex=FSorted[FGotSorted]; GotIndex:=FGotIndex; GotSorted:=FGotSorted; Result:=true; end else {$ENDIF} begin a:=0; b:=FElementIndex-1; d:=FElementIndex; Result:=false;//default while b>=a do begin c:=(a+b) div 2; d:=FElements[c].SortIndex; //if c=a? c=b? x:=CompareStr(Key,FElements[d].Key); if x=0 then begin a:=c; b:=c-1; Result:=true; end else if x<0 then if b=c then dec(b) else b:=c else if a=c then inc(a) else a:=c; end; GotSorted:=a; GotIndex:=d; {$IFNDEF JSONDOC_THREADSAFE} FGotSorted:=a; FGotIndex:=d; FGotMatch:=Result; {$ENDIF} end;end;function TJSONDocument.Get_Item(const Key: WideString): Variant;var GotIndex,GotSorted:integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Self<>nil) and GetKeyIndex(Key,GotIndex,GotSorted) and (FElements[GotIndex].LoadIndex=FLoadIndex) then Result:=FElements[GotIndex].Value else Result:=Null; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocument.ReUse(const Key: WideString): Variant;var GotIndex,GotSorted:integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Self<>nil) and GetKeyIndex(Key,GotIndex,GotSorted) then begin FElements[GotIndex].LoadIndex:=FLoadIndex; Result:=FElements[GotIndex].Value; end else Result:=Null; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TJSONDocument.Set_Item(const Key: WideString; const Value: Variant);var i,GotIndex,GotSorted:integer;const GrowStep=$20;//not too much, not too little (?)begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} //if ((VarType(Value) and varArray)<>0) and (VarArrayDimCount(v)>1) then // raise EJSONException.Create( // 'VarArray: multi-dimensional arrays not supported'); if not GetKeyIndex(Key,GotIndex,GotSorted) then begin if FElementIndex=FElementSize then begin inc(FElementSize,GrowStep); SetLength(FElements,FElementSize); end; for i:=FElementIndex-1 downto GotSorted do FElements[i+1].SortIndex:=FElements[i].SortIndex; GotIndex:=FElementIndex; inc(FElementIndex); FElements[GotSorted].SortIndex:=GotIndex; FElements[GotIndex].Key:=Key; end; FElements[GotIndex].Value:=Value; FElements[GotIndex].LoadIndex:=FLoadIndex; //FDirty:=true; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;{$IFDEF JSONDOC_P2}{$DEFINE JSONDOC_JSON_LOOSE}{$DEFINE JSONDOC_JSON_PASCAL_STRINGS}{$ENDIF}procedure TJSONDocument.Parse(const JSONData: WideString);var i,l:integer; function SkipWhiteSpace:WideChar; begin while (i<=l) and (jsonData[i]<=' ') do inc(i); if i<=l then Result:=jsonData[i] else Result:=#0; end; function ExVicinity(di:integer):WideString; const VicinityExtent=12; var i:integer; begin if di<=VicinityExtent then Result:=#13#10'(#'+IntToStr(di)+')"'+Copy(jsonData,1,di-1)+ ' >>> '+jsonData[di]+' <<< '+Copy(jsonData,di+1,VicinityExtent)+'"' else Result:=#13#10'(#'+IntToStr(di)+')"...'+ Copy(jsonData,di-VicinityExtent,VicinityExtent)+ ' >>> '+jsonData[di]+' <<< '+Copy(jsonData,di+1,VicinityExtent)+'"'; for i:=1 to Length(Result) do if word(Result[i])<32 then Result[i]:='|'; end; procedure Expect(c:WideChar;const msg:string); begin while (i<=l) and (jsonData[i]<=' ') do inc(i); if (i<=l) and (jsonData[i]=c) then inc(i) else {$IFDEF JSONDOC_JSON_LOOSE} ; {$ELSE} raise EJSONDecodeException.Create(msg+ExVicinity(i)); {$ENDIF} end; procedure GetStringIndexes(var i1,i2:integer); begin //assert jsonData[i]='"' i1:=i; inc(i); while (i<=l) and (jsonData[i]<>'"') do begin if jsonData[i]='\' then inc(i);//just skip all to skip any '"' inc(i); end; i2:=i; inc(i); end; {$IFDEF JSONDOC_JSON_PASCAL_STRINGS} procedure GetPascalIndexes(var i1,i2:integer); begin i1:=i; while (i<=l) and ((jsonData[i]='''') or (jsonData[i]='#')) do if jsonData[i]='''' then begin inc(i); while (i<=l) and (jsonData[i]<>'''') do inc(i); if i<=l then inc(i); end else begin inc(i); if (i<=l) and (jsonData[i]='$') then begin inc(i); while (i<=l) and (word(jsonData[i]) in [$30..$39,$41..$5A,$61..$7A]) do inc(i); end else while (i<=l) and (word(jsonData[i]) in [$30..$39]) do inc(i); end; i2:=i; end; {$ENDIF} function GetStringValue(i1,i2:integer):WideString; var ii,di,u,v,w:integer; begin //assert i1<=l //assert i2<=l //assert i1<i2 {$IFDEF JSONDOC_JSON_PASCAL_STRINGS} if (jsonData[i1]='''') or (jsonData[i1]='#') then begin SetLength(Result,i2-i1); ii:=1; di:=i1; while di<i2 do begin case AnsiChar(jsonData[di]) of '''': begin inc(di); u:=0; while (di<i2) and (u=0) do begin if jsonData[di]='''' then begin inc(di); if (di<=l) and (jsonData[di]='''') then begin Result[ii]:=''''; inc(ii); inc(di); end else u:=1; end else begin Result[ii]:=jsonData[di]; inc(ii); inc(di); end; end; end; '#': begin inc(di); if (di<i2) and (jsonData[di]='$') then begin w:=0; u:=0; inc(di); while (u<4) and (di<i2) and (word(jsonData[di]) in [$30..$39,$41..$5A,$61..$7A]) do begin if di=i2 then raise EJSONDecodeException.Create( 'JSON Incomplete espace sequence'+ExVicinity(di)); v:=word(jsonData[di]); case v of $30..$39:w:=(w shl 4) or (v and $F); $41..$5A,$61..$7A:w:=(w shl 4) or ((v and $1F)+9); else raise EJSONDecodeException.Create( 'JSON Invalid espace sequence'+ExVicinity(di)); end; inc(di); inc(u); end; Result[ii]:=WideChar(w); inc(ii); end else begin w:=0; u:=0; while (u<5) and (di<i2) and (word(jsonData[di]) in [$30..$39]) do begin if di=i2 then raise EJSONDecodeException.Create( 'JSON Incomplete espace sequence'+ExVicinity(di)); w:=w*10+(word(jsonData[di]) and $F); inc(di); inc(u); end; Result[ii]:=WideChar(w); inc(ii); end; end; else raise EJSONDecodeException.Create( 'JSON Unknown pascal string syntax'+ExVicinity(di)); end; end; SetLength(Result,ii-1); end else {$ENDIF} begin {$IFDEF JSONDOC_JSON_STRICT} //assert jsonData[i1]='"' //assert jsonData[i2]='"'; inc(i1); {$ELSE} if jsonData[i1]='"' then inc(i1); {$ENDIF} SetLength(Result,i2-i1); ii:=1; di:=i1; while di<i2 do begin //assert ii<=Length(Result); if jsonData[di]='\' then begin inc(di); case AnsiChar(jsonData[di]) of '"','\','/':Result[ii]:=jsonData[di]; 'b':Result[ii]:=#8; 't':Result[ii]:=#9; 'n':Result[ii]:=#10; 'f':Result[ii]:=#12; 'r':Result[ii]:=#13; 'x': begin inc(di); if di=i2 then raise EJSONDecodeException.Create( 'JSON Incomplete espace sequence'+ExVicinity(di)); v:=word(jsonData[di]); case v of $30..$39:w:=(v and $F) shl 4; $41..$5A,$61..$7A:w:=((v and $1F)+9) shl 4; else raise EJSONDecodeException.Create( 'JSON Invalid espace sequence'+ExVicinity(di)); end; inc(di); if di=i2 then raise EJSONDecodeException.Create( 'JSON Incomplete espace sequence'+ExVicinity(di)); v:=word(jsonData[di]); case v of $30..$39:w:=w or (v and $F); $41..$5A,$61..$7A:w:=w or ((v and $1F)+9); else raise EJSONDecodeException.Create( 'JSON Invalid espace sequence'+ExVicinity(di)); end; Result[ii]:=WideChar(w); end; 'u': begin w:=0; for u:=0 to 3 do begin inc(di); if di=i2 then raise EJSONDecodeException.Create( 'JSON Incomplete espace sequence'+ExVicinity(di)); v:=word(jsonData[di]); case v of $30..$39:w:=(w shl 4) or (v and $F); $41..$5A,$61..$7A:w:=(w shl 4) or ((v and $1F)+9); else raise EJSONDecodeException.Create( 'JSON Invalid espace sequence'+ExVicinity(di)); end; end; Result[ii]:=WideChar(w); end; else raise EJSONDecodeException.Create( 'JSON Unknown escape sequence'+ExVicinity(di)); end; end else Result[ii]:=jsonData[di]; inc(di); inc(ii); end; SetLength(Result,ii-1); end; end;const stackGrowStep=$20;//not too much, not too little (?) arrGrowStep=$20;var IsArray:boolean; k1,k2,v1,v2,a1,ai,al:integer; d:IJSONDocument; a:array of Variant; at,vt:TVarType; procedure SetValue(const v:Variant); begin //assert da=nil if IsArray then begin if ai=al then begin inc(al,arrGrowStep);//not too much, not too little (?) SetLength(a,al); end; a[ai]:=v; //detect same type elements array vt:=TVarData(v).VType; case at of varEmpty: at:=vt; varShortInt,varByte://i1,u1 case vt of varSmallInt,varInteger,varSingle,varDouble, varLongWord,varInt64,$0015: at:=vt; varShortInt: ;//at:=varShortInt; else at:=varVariant; end; varSmallint,varWord://i2,u2 case vt of varInteger,varSingle,varDouble,varLongWord,varInt64,$0015: at:=vt; varSmallInt, varShortInt,varByte,varWord: ;//at:=varSmallInt; else at:=varVariant; end; varInteger,varLongWord://i4,u4 case vt of varSingle,varDouble,varInt64,$0015: at:=vt; varSmallInt,varInteger, varShortInt,varByte,varWord,varLongWord: ;//at:=varInteger; else at:=varVariant; end; varInt64,$0015://i8 case vt of varSingle,varDouble: at:=vt; varSmallInt,varInteger, varShortInt,varByte,varWord,varLongWord,varInt64,$0015: ;//at:=varInt64; else at:=varVariant; end; varSingle: case vt of varDouble: at:=vt; varSmallInt,varInteger,varSingle, varShortInt,varByte,varWord,varLongWord: ;//at:=varSingle else at:=varVariant; end; varDouble: case vt of varSmallInt,varInteger,varSingle,varDouble, varShortInt,varByte,varWord,varLongWord: ;//at:=varDouble else at:=varVariant; end; varVariant: ;//Already creating an VarArray of varVariant else if at<>vt then at:=varVariant; end; inc(ai); end else d[GetStringValue(k1,k2)]:=v end;var firstItem,b:boolean; stack:array of record k1,k2:integer; d:IJSONDocument; end; stackIndex,stackSize:integer; ods:char; key:WideString; d1:IJSONDocument; dr:IJSONDocWithReUse; da:IJSONDocArray; aa:TJSONArray; da0,da1:integer; v:Variant; v64:int64; procedure CheckValue; begin //assert da<>nil if stackIndex=da0 then raise EJSONDecodeException.Create('IJSONDocArray: non-document element in array'); end;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} //Clear;? let caller decide. i:=1; l:=Length(jsonData); //object starts Expect('{','JSON doesn''t define an object, "{" expected.'); stackSize:=0; stackIndex:=0; ai:=0; a1:=0; al:=0; da:=nil; da0:=0; da1:=0; IsArray:=false; firstItem:=true; {$if CompilerVersion >= 24} ods:=FormatSettings.DecimalSeparator; {$else} ods:=DecimalSeparator; {$ifend} try {$if CompilerVersion >= 24} FormatSettings.DecimalSeparator:='.'; {$else} DecimalSeparator:='.'; {$ifend} d:=Self; //main loop over key/values and nested objects/arrays while (i<=l) and (stackIndex<>-1) do begin if firstItem then firstItem:=false else Expect(',','JSON element not delimited by comma'); if not(IsArray) and (SkipWhiteSpace<>'}') then begin //key string case AnsiChar(SkipWhiteSpace) of '"': GetStringIndexes(k1,k2); {$IFDEF JSONDOC_JSON_PASCAL_STRINGS} '''','#': GetPascalIndexes(k1,k2); {$ENDIF} else {$IFDEF JSONDOC_JSON_STRICT} raise EJSONDecodeException.Create( 'JSON key string not enclosed in double quotes'+ExVicinity(i)); {$ELSE} begin k1:=i; while (i<=l) and (jsonData[i]>' ') and not( (jsonData[i]=':') or (jsonData[i]='"') {$IFDEF JSONDOC_JSON_LOOSE} or (jsonData[i]='{') or (jsonData[i]='[') or (jsonData[i]='=') or (jsonData[i]=';') {$ENDIF} ) do inc(i); k2:=i; end; {$ENDIF} end; Expect(':','JSON key, value not separated by colon'); {$IFDEF JSONDOC_JSON_LOOSE} if (i<=l) and (jsonData[i]='=') then inc(i); {$ENDIF} end; //value case AnsiChar(SkipWhiteSpace) of '{','['://object or array begin b:=IsArray; if jsonData[i]='{' then begin //an object starts if da=nil then if IsArray then begin if ai=al then begin inc(al,arrGrowStep);//not too much, not too little (?) SetLength(a,al); end; v:=JSON; a[ai]:=v; //detect same type elements array if at=varEmpty then at:=varUnknown else if at<>varUnknown then at:=varVariant; inc(ai); end else begin key:=GetStringValue(k1,k2); if d.QueryInterface(IID_IJSONDocWithReUse,dr)=S_OK then begin v:=dr.ReUse(key); dr:=nil; end else v:=Null; if (TVarData(v).VType in [varDispatch,varUnknown]) and (TVarData(v).VUnknown<>nil) and (IUnknown(v).QueryInterface(IID_IJSONDocument,d1)=S_OK) then d1:=nil else begin v:=JSON; d[key]:=v; end; end else if da0=stackIndex then da1:=i; IsArray:=false; end else begin //an array starts if da=nil then if d.QueryInterface(IID_IJSONDocWithReUse,dr)=S_OK then begin key:=GetStringValue(k1,k2); v:=dr.ReUse(key); dr:=nil; if (TVarData(v).VType in [varDispatch,varUnknown]) and (TVarData(v).VUnknown<>nil) and (IUnknown(v).QueryInterface(IID_IJSONDocArray,da)=S_OK) then begin da0:=stackIndex+1; da1:=0;//see first '{' above end; end; IsArray:=true; end; inc(i); //push onto stack if stackIndex=stackSize then begin inc(stackSize,stackGrowStep); SetLength(stack,stackSize); end; if b then //if WasArray then begin stack[stackIndex].k1:=a1; stack[stackIndex].k2:=at; stack[stackIndex].d:=nil; end else begin stack[stackIndex].k1:=k1; stack[stackIndex].k2:=k2; stack[stackIndex].d:=d; end; inc(stackIndex); firstItem:=true; if da=nil then if IsArray then begin a1:=ai; at:=varEmpty;//used to detect same type elements array end else d:=IUnknown(v) as IJSONDocument; end; '}',']':;//empty object or array, drop into close array below '"'://string begin GetStringIndexes(v1,v2); if da=nil then SetValue(GetStringValue(v1,v2)) else CheckValue; end; {$IFDEF JSONDOC_JSON_PASCAL_STRINGS} '''','#'://pascal-style string begin GetPascalIndexes(v1,v2); if da=nil then SetValue(GetStringValue(v1,v2)) else CheckValue; end; '$'://pascal-style hex digit begin inc(i); v1:=i; v64:=0; while (i<=l) and (word(jsonData[i]) in [$30..$39,$41..$5A,$61..$7A]) do begin case word(jsonData[i]) of $30..$39:v64:=(v64 shl 4) or (word(jsonData[i]) and $F); $41..$5A,$61..$7A:v64:=(v64 shl 4) or ((word(jsonData[i]) and $1F)+9); else raise EJSONDecodeException.Create( 'JSON Invalid espace sequence'+ExVicinity(i)); end; inc(i); end; if i=v1 then raise EJSONDecodeException.Create( 'JSON Unrecognized value type'+ExVicinity(i)); if v64>=$80000000 then //int64 SetValue(v64) else if v64>=$80 then //int32 SetValue(integer(v64)) else //int8 SetValue(SmallInt(v64)); end; {$ENDIF} '0'..'9','-'://number begin b:=jsonData[i]='-'; v1:=i; if b then inc(i); if da=nil then begin v64:=0; while (i<=l) and (word(jsonData[i]) in [$30..$39]) do begin v64:=v64*10+(word(jsonData[i]) and $F);//TODO: detect overflow inc(i); end; if AnsiChar(jsonData[i]) in ['.','e','E'] then begin //float inc(i); while (i<=l) and (AnsiChar(jsonData[i]) in ['0'..'9','-','+','e','E']) do inc(i); //try except EConvertError? SetValue(StrToFloat(Copy(jsonData,v1,i-v1))); end else begin //integer if v64>=$80000000 then //int64 if b then SetValue(-v64) else SetValue(v64) else if v64>=$80 then //int32 if b then SetValue(-integer(v64)) else SetValue(integer(v64)) else //int8 if b then SetValue(-SmallInt(v64)) else SetValue(SmallInt(v64)); end; end else begin //skip CheckValue; while (i<=l) and (word(jsonData[i]) in [$30..$39]) do inc(i); if AnsiChar(jsonData[i]) in ['.','e','E'] then begin inc(i); while (i<=l) and (AnsiChar(jsonData[i]) in ['0'..'9','-','+','e','E']) do inc(i); end; end; end; {$IFDEF JSONDOC_JSON_LOOSE} ';':inc(i); else begin v1:=i; while (i<=l) and (jsonData[i]>' ') and not( (jsonData[i]=':') or (jsonData[i]=',') or (jsonData[i]='"') or (jsonData[i]='}') or (jsonData[i]=']') {$IFDEF JSONDOC_JSON_PASCAL_STRINGS} or (jsonData[i]='''') {$ENDIF} ) do inc(i); v2:=i; if v1=v2 then raise EJSONDecodeException.Create( 'JSON Value expected'+ExVicinity(i)); if da=nil then if (v2-v1=4) and (jsonData[v1]='t') and (jsonData[v1+1]='r') and (jsonData[v1+2]='u') and (jsonData[v1+3]='e') then SetValue(true) else if (v2-v1=5) and (jsonData[v1]='f') and (jsonData[v1+1]='a') and (jsonData[v1+2]='l') and (jsonData[v1+3]='s') and (jsonData[v1+4]='e') then SetValue(false) else if (v2-v1=4) and (jsonData[v1]='n') and (jsonData[v1+1]='u') and (jsonData[v1+2]='l') and (jsonData[v1+3]='l') then SetValue(Null) else SetValue(GetStringValue(v1,v2)) else CheckValue; end; {$ELSE} 't'://true begin inc(i); Expect('r','JSON true misspelled'); Expect('u','JSON true misspelled'); Expect('e','JSON true misspelled'); if da=nil then SetValue(true) else CheckValue; end; 'f'://false begin inc(i); Expect('a','JSON false misspelled'); Expect('l','JSON false misspelled'); Expect('s','JSON false misspelled'); Expect('e','JSON false misspelled'); if da=nil then SetValue(false) else CheckValue; end; 'n'://null begin inc(i); Expect('u','JSON null misspelled'); Expect('l','JSON null misspelled'); Expect('l','JSON null misspelled'); if da=nil then SetValue(Null) else CheckValue; //TODO: support null in IJSONDocArray end; else raise EJSONDecodeException.Create( 'JSON Unrecognized value type'+ExVicinity(i)); {$ENDIF} end; if not firstItem then begin b:=true; while b do begin v:=Null; if IsArray then if SkipWhiteSpace=']' then begin if da=nil then begin if FUseIJSONArray then begin aa:=TJSONArray.Create(ai-a1); k1:=a1; k2:=0; while k1<ai do begin //aa[k2]:=a[k1];VarClear(a[k1]); VarMove(aa.FData[k2],a[k1]); inc(k1); inc(k2); end; v:=aa as IJSONArray; end else begin if not(VarTypeIsValidArrayType(at)) then at:=varVariant; v:=VarArrayCreate([0,ai-a1-1],at); k1:=a1; k2:=0; while k1<ai do begin v[k2]:=a[k1]; VarClear(a[k1]); inc(k1); inc(k2); end; end; ai:=a1; end; end else b:=false else b:=SkipWhiteSpace='}'; if b then begin inc(i); //pop from stack if stackIndex=0 then begin //EndIndex:=i; dec(stackIndex);//stackindex:=-1; b:=false; end else begin dec(stackIndex); if stack[stackIndex].d=nil then begin a1:=stack[stackIndex].k1; at:=stack[stackIndex].k2; IsArray:=true; end else begin if da=nil then d:=stack[stackIndex].d; k1:=stack[stackIndex].k1; k2:=stack[stackIndex].k2; stack[stackIndex].d:=nil; IsArray:=false; end; if da<>nil then if stackIndex=da0 then da.AddJSON(Copy(jsonData,da1,i-da1)) else if stackIndex=da0-1 then da:=nil;//done end; //set array if (da=nil) and (TVarData(v).VType<>varNull) then SetValue(v); end; end; end; end; {$IFNDEF JSONDOC_JSON_LOOSE} if stackIndex<>-1 then raise EJSONDecodeException.Create( 'JSON with '+IntToStr(stackIndex+1)+' objects or arrays not closed'); {$ENDIF} if (i<=l) and (SkipWhiteSpace<>#0) then raise EJSONDecodeException.Create( 'JSON has unexpected data after root document '+ExVicinity(i)); finally {$if CompilerVersion >= 24} FormatSettings.DecimalSeparator:=ods; {$else} DecimalSeparator:=ods; {$ifend} end; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function JSONEncodeStr(const xx:WideString):WideString;const resGrowStep=$100; hex:array[0..15] of WideChar=( '0','1','2','3','4','5','6','7', '8','9','A','B','C','D','E','F');var i,j,k,l:integer; w:word;begin l:=Length(xx); SetLength(Result,l+2); Result[1]:='"'; i:=1; j:=1; k:=l+2; while i<=l do begin w:=word(xx[i]); case w of 0..31,word('"'),word('\'): begin if j+3>k then begin k:=((k div resGrowStep)+1)*resGrowStep; SetLength(Result,k); end; inc(j); Result[j]:='\'; inc(j); case w of 8:Result[j]:='b'; 9:Result[j]:='t'; 10:Result[j]:='n'; 12:Result[j]:='f'; 13:Result[j]:='r'; word('"'),word('\'):Result[j]:=xx[i]; else begin Result[j]:='u'; if j+4>k then begin k:=((k div resGrowStep)+1)*resGrowStep; SetLength(Result,k); end; inc(j);Result[j]:=hex[w shr 12]; inc(j);Result[j]:=hex[w shr 8 and $F]; inc(j);Result[j]:=hex[w shr 4 and $F]; inc(j);Result[j]:=hex[w and $F]; end; end; end; else begin if j+2>k then begin k:=((k div resGrowStep)+1)*resGrowStep; SetLength(Result,k); end; inc(j); Result[j]:=WideChar(w); end; end; inc(i); end; inc(j); Result[j]:='"'; SetLength(Result,j);end;{function JSONVarToStr(const v: Variant):WideString;begin if (TVarData(v).VType and varArray)=0 then Result:=JSONVarToStr1(v) else .....end;}function JSONVarToStr1(const v: Variant):WideString;var uu:IUnknown; d:IJSONDocument; da:IJSONArray;begin case TVarData(v).VType and varTypeMask of varNull:Result:='null'; varSmallint,varInteger,varShortInt, varByte,varWord,varLongWord,varInt64: Result:=VarToWideStr(v); varSingle,varDouble,varCurrency: Result:=FloatToStr(v);//? varDate: //Result:=FloatToStr(VarToDateTime(v));//? Result:='"'+FormatDateTime('yyyy-mm-dd"T"hh:nn:ss.zzz', VarToDateTime(v))+'"'; varOleStr,varString,$0102: Result:=JSONEncodeStr(VarToWideStr(v)); varBoolean: if v then Result:='true' else Result:='false'; varDispatch,varUnknown: begin uu:=IUnknown(v); if uu=nil then Result:='null' else if uu.QueryInterface(IID_IJSONDocument,d)=S_OK then begin //revert to ToString Result:=d.ToString; d:=nil; end else if uu.QueryInterface(IID_IJSONArray,da)=S_OK then begin //TODO: re-do indenting Result:=da.ToString; da:=nil; end else //IRegExp2? IStream? IPersistStream? raise EJSONEncodeException.Create( 'No supported interface found on object'); end; else raise EJSONEncodeException.Create( 'Unsupported variant type '+IntToHex(TVarData(v).VType,4)); end;end;function TJSONDocument.JSONToString: WideString;const stackGrowStep=$20;var e:IJSONEnumerator; IsArray,firstItem:boolean; stack:array of record e:IJSONEnumerator; IsArray:boolean; end; stackLength,stackIndex:integer; function ExTrace:string; var i:integer; begin if IsArray then Result:=' #'+e.Key else Result:=' "'+e.Key+'"'; i:=stackIndex; while i<>0 do begin dec(i); if stack[i].IsArray then Result:=' #'+stack[i].e.Key+Result else Result:=' "'+stack[i].e.Key+'"'+Result; end; end;const resultGrowStep=$4000;var wi,wl:cardinal;{$IFDEF JSONDOC_STOREINDENTING}const tabs=#13#10#9#9#9#9#9#9#9#9#9#9#9#9#9#9;var tabIndex:integer; procedure wr(const xx,yy,zz:WideString); var xi,xj,xk,xl,yi,yl,zl:cardinal; begin xi:=1; xl:=Length(xx); yl:=Length(yy);//assert <>0 zl:=Length(zz); while xi<=xl do begin xj:=xi; yi:=0; while (xi<=xl) and (yi<yl) do begin if (xx[xi]=yy[1]) and (xi+yl<=xl) then begin while (yi<yl) and (xx[xi+yi]=yy[1+yi]) do inc(yi); if yi<yl then inc(xi); end else inc(xi); end; xk:=xi-xj; while wi+xk>wl do begin //grow inc(wl,resultGrowStep); SetLength(Result,wl); end; Move(xx[xj],Result[wi+1],xk*2); inc(wi,xk); if xi<=xl then begin inc(xi,yl); while wi+zl>wl do begin //grow inc(wl,resultGrowStep); SetLength(Result,wl); end; Move(zz[1],Result[wi+1],zl*2); inc(wi,zl); end; end; end;{$ENDIF} procedure w(const xx:WideString); var xl:cardinal; begin xl:=Length(xx); while wi+xl>wl do begin //grow inc(wl,resultGrowStep); SetLength(Result,wl); end; Move(xx[1],Result[wi+1],xl*2); inc(wi,xl); end; procedure Push(const NewEnum:IJSONEnumerator;NewIsArray:boolean); begin if stackIndex=stackLength then begin inc(stackLength,stackGrowStep); SetLength(stack,stackLength); end; stack[stackIndex].e:=e; stack[stackIndex].IsArray:=IsArray; inc(stackIndex); e:=NewEnum; IsArray:=NewIsArray; if IsArray then w('[') else w('{'); firstItem:=true; {$IFDEF JSONDOC_STOREINDENTING} inc(tabIndex); {$ENDIF} end;var ods:char; vt:TVarType; uu:IUnknown; d:IJSONDocument; de:IJSONEnumerable; da1:IJSONArray; da:IJSONDocArray;begin if Self=nil then begin Result:='null'; Exit; end; {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} wi:=1; wl:=resultGrowStep; SetLength(Result,wl); Result[1]:='{'; stackLength:=0; stackIndex:=0; e:=TJSONEnumerator.Create(Self); IsArray:=false; {$if CompilerVersion >= 24} ods:= FormatSettings.DecimalSeparator; {$else} ods:=DecimalSeparator; {$ifend} try {$if CompilerVersion >= 24} FormatSettings.DecimalSeparator:='.'; {$else} DecimalSeparator:='.'; {$ifend} //w('{');//see above firstItem:=true; {$IFDEF JSONDOC_STOREINDENTING} tabIndex:=3; {$ENDIF} while e<>nil do if e.Next then begin if firstItem then firstItem:=false else w(','); {$IFDEF JSONDOC_STOREINDENTING} w(Copy(tabs,1,tabIndex)); {$ENDIF} if not IsArray then begin w(JSONEncodeStr(e.Key)); {$IFDEF JSONDOC_STOREINDENTING} w(': '); {$ELSE} w(':'); {$ENDIF} end; //write value vt:=TVarData(PVariant(e.v0)^).VType; //if (vt and varByRef)<>0 then // raise EJSONEncodeException.Create('VarByRef: not implemented'+ExTrace); if (vt and varArray)=0 then begin //not an array, plain value //TODO: deduplicate with JSONVarToStr1(PVariant(e.v0)^); case vt and varTypeMask of varNull:w('null'); varSmallint,varInteger,varShortInt, varByte,varWord,varLongWord,varInt64: w(VarToWideStr(PVariant(e.v0)^)); varSingle,varDouble,varCurrency: w(FloatToStr(PVariant(e.v0)^));//? varDate: begin //w(FloatToStr(VarToDateTime(v)));//? w('"'); //TODO:"yyyy-mm-dd hh:nn:ss.zzz"? $date? w(FormatDateTime('yyyy-mm-dd"T"hh:nn:ss.zzz',VarToDateTime(PVariant(e.v0)^))); w('"'); end; varOleStr,varString,$0102: w(JSONEncodeStr(VarToWideStr(PVariant(e.v0)^))); varBoolean: if PVariant(e.v0)^ then w('true') else w('false'); varDispatch,varUnknown: begin uu:=IUnknown(PVariant(e.v0)^); if uu=nil then w('null') else if uu.QueryInterface(IID_IJSONEnumerable,de)=S_OK then begin Push(de.NewEnumerator,false); de:=nil; end else if uu.QueryInterface(IID_IJSONDocument,d)=S_OK then begin //revert to ToString w(d.ToString); d:=nil; end else if uu.QueryInterface(IID_IJSONDocArray,da)=S_OK then begin {$IFDEF JSONDOC_STOREINDENTING} wr(da.ToString,#13#10,Copy(tabs,1,tabIndex)); {$ELSE} w(da.ToString); {$ENDIF} da:=nil; end else if uu.QueryInterface(IID_IJSONArray,da1)=S_OK then begin Push(TJSONArrayEnumerator.Create(da1),true); da1:=nil; end else //IRegExp2? IStream? IPersistStream? raise EJSONEncodeException.Create( 'No supported interface found on object'+ExTrace); end; else raise EJSONEncodeException.Create( 'Unsupported variant type '+IntToHex(vt,4)+ExTrace); end; end else begin //TODO: if (vt and varTypeMask)=varByte then BLOB? Push(TVarArrayEnumerator.Create(e.v0),true); end; end else begin {$IFDEF JSONDOC_STOREINDENTING} dec(tabIndex); if not firstItem then w(Copy(tabs,1,tabIndex)); {$ENDIF} if IsArray then w(']') else w('}'); firstItem:=false; if stackIndex=0 then e:=nil else begin //pop from stack dec(stackIndex); e:=stack[stackIndex].e; IsArray:=stack[stackIndex].IsArray; stack[stackIndex].e:=nil; end; end; SetLength(Result,wi); finally {$if CompilerVersion >= 24} FormatSettings.DecimalSeparator:=ods; {$else} DecimalSeparator:=ods; {$ifend} end; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocument.ToVarArray: Variant;var i,l:integer;begin if Self=nil then begin Result:=Null; Exit; end; {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} l:=0; for i:=0 to FElementIndex-1 do if FElements[i].LoadIndex=FLoadIndex then inc(l); //and not(VarIsNull(FElements[i].Value))? Result:=VarArrayCreate([0,l-1,0,1],varVariant); l:=0; for i:=0 to FElementIndex-1 do if FElements[i].LoadIndex=FLoadIndex then begin Result[l,0]:=FElements[i].Key; Result[l,1]:=FElements[i].Value; inc(l); end; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TJSONDocument.Clear;var i:integer; uu:IUnknown; d:IJSONDocument; da:IJSONDocArray;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ELSE} FGotMatch:=false; {$ENDIF} //FDirty:=false; for i:=0 to FElementIndex-1 do if TVarData(FElements[i].Value).VType=varUnknown then begin uu:=IUnknown(FElements[i].Value); if uu=nil then VarClear(FElements[i].Value) else if uu.QueryInterface(IID_IJSONDocument,d)=S_OK then begin d.Clear; d:=nil; end else if uu.QueryInterface(IID_IJSONDocArray,da)=S_OK then begin da.Clear; da:=nil; end else VarClear(FElements[i].Value); end else VarClear(FElements[i].Value); inc(FLoadIndex); {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TJSONDocument.Delete(const Key: WideString);var GotIndex,GotSorted:integer; uu:IUnknown; d:IJSONDocument; da:IJSONDocArray;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if GetKeyIndex(Key,GotIndex,GotSorted) then begin if TVarData(FElements[GotIndex].Value).VType=varUnknown then begin uu:=IUnknown(FElements[GotIndex].Value); if uu=nil then VarClear(FElements[GotIndex].Value) else if uu.QueryInterface(IID_IJSONDocument,d)=S_OK then begin d.Clear; d:=nil; end else if uu.QueryInterface(IID_IJSONDocArray,da)=S_OK then begin da.Clear; da:=nil; end else VarClear(FElements[GotIndex].Value); end else VarClear(FElements[GotIndex].Value); FElements[GotIndex].LoadIndex:=FLoadIndex-1; end; //else raise? //FDirty:=true; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocument.NewEnumerator: IJSONEnumerator;begin Result:=TJSONEnumerator.Create(Self);end;{ TJSONEnumerator }constructor TJSONEnumerator.Create(Data: TJSONDocument);begin inherited Create; FData:=Data; FIndex:=-1; //TODO: hook into TJSONDocument destructor?end;destructor TJSONEnumerator.Destroy;begin FData:=nil; inherited;end;function TJSONEnumerator.EOF: boolean;var i:integer;begin if FData=nil then Result:=true else begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FData.FLock); try {$ENDIF} i:=FIndex; if i=-1 then i:=0; while (i<FData.FElementIndex) and (FData.FElements[i].LoadIndex<>FData.FLoadIndex) do inc(i); Result:=i>=FData.FElementIndex; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FData.FLock); end; {$ENDIF} end;end;function TJSONEnumerator.Next: boolean;begin if FData=nil then Result:=false else begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FData.FLock); try {$ENDIF} inc(FIndex); while (FIndex<FData.FElementIndex) and (FData.FElements[FIndex].LoadIndex<>FData.FLoadIndex) do inc(FIndex); Result:=FIndex<FData.FElementIndex; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FData.FLock); end; {$ENDIF} end;end;function TJSONEnumerator.Get_Key: WideString;begin if (FIndex<0) or (FData=nil) or (FIndex>=FData.FElementIndex) then raise ERangeError.Create('Out of range') else Result:=FData.FElements[FIndex].Key;end;function TJSONEnumerator.Get_Value: Variant;begin if (FIndex<0) or (FData=nil) or (FIndex>=FData.FElementIndex) then raise ERangeError.Create('Out of range') else Result:=FData.FElements[FIndex].Value;end;procedure TJSONEnumerator.Set_Value(const Value: Variant);begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FData.FLock); try {$ENDIF} if (FIndex<0) or (FData=nil) or (FIndex>=FData.FElementIndex) then raise ERangeError.Create('Out of range') else FData.FElements[FIndex].Value:=Value; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FData.FLock); end; {$ENDIF}end;function TJSONEnumerator.v0: pointer;begin if (FIndex<0) or (FData=nil) or (FIndex>=FData.FElementIndex) then raise ERangeError.Create('Out of range') else Result:=@FData.FElements[FIndex].Value;end;{ TVarArrayEnumerator }constructor TVarArrayEnumerator.Create(const Data: PVariant);begin inherited Create; if VarArrayDimCount(Data^)<>1 then raise EJSONException.Create('VarArray: multi-dimensional arrays not supported'); FData:=Data; VarClear(FCurrent); FIndex:=VarArrayLowBound(Data^,1); FMax:=VarArrayHighBound(Data^,1)+1; FCurrentIndex:=FIndex-1; if FIndex<FMax then dec(FIndex);//see Nextend;destructor TVarArrayEnumerator.Destroy;begin VarClear(FCurrent); FData:=nil; inherited;end;function TVarArrayEnumerator.EOF: boolean;begin Result:=not(FIndex<FMax);end;function TVarArrayEnumerator.Get_Key: WideString;begin Result:=IntToStr(FIndex);end;function TVarArrayEnumerator.Get_Value: Variant;begin Result:=FData^[FIndex];end;function TVarArrayEnumerator.Next: boolean;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} inc(FIndex); Result:=FIndex<FMax; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TVarArrayEnumerator.Set_Value(const Value: Variant);begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} FData^[FIndex]:=Value; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TVarArrayEnumerator.v0: pointer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if FCurrentIndex<>FIndex then begin FCurrent:=FData^[FIndex];//TODO: keep SafeArray locked for lifetime of TVarArrayEnumerator instance? FCurrentIndex:=FIndex; end; Result:=@FCurrent; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;{ TVarJSONArray }constructor TVarJSONArray.Create(const Data: Variant);begin inherited Create; if (TVarData(Data).VType and varArray)=0 then raise EJSONException.Create('TVarJSONArray: array variant expected'); if VarArrayDimCount(Data)<>1 then raise EJSONException.Create('TVarJSONArray: multi-dimensional arrays not supported'); FData:=Data; v1:=VarArrayLowBound(FData,1); v2:=VarArrayHighBound(FData,1)+1; VarClear(FCurrent); FCurrentIndex:=-1;end;constructor TVarJSONArray.CreateNoCopy(var Data: Variant);begin inherited Create; if (TVarData(Data).VType and varArray)=0 then raise EJSONException.Create('TVarJSONArray: array variant expected'); if VarArrayDimCount(Data)<>1 then raise EJSONException.Create('TVarJSONArray: multi-dimensional arrays not supported'); VarMove(FData,Data); v1:=VarArrayLowBound(FData,1); v2:=VarArrayHighBound(FData,1)+1; VarClear(FCurrent); FCurrentIndex:=-1;end;destructor TVarJSONArray.Destroy;begin VarClear(FCurrent); VarClear(FData); inherited;end;function TVarJSONArray.Count: integer;begin Result:=v2-v1;end;function TVarJSONArray.Get_Item(Index: integer): Variant;begin if (Index<0) or (Index>=v2-v1) then raise ERangeError.Create('Out of range'); Result:=FData[Index+v1];end;procedure TVarJSONArray.Set_Item(Index: integer; const Value: Variant);begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Index<0) or (Index>=v2-v1) then raise ERangeError.Create('Out of range'); FData[Index+v1]:=Value; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TVarJSONArray.v0(Index: integer): pointer;begin {$IFDEF JSONDOC_THREADSAFE} Result:=nil;//counter warning EnterCriticalSection(FLock); try {$ENDIF} if FCurrentIndex<>Index then begin if (Index<0) or (Index>=v2-v1) then raise ERangeError.Create('Out of range'); FCurrent:=FData[Index+v1]; FCurrentIndex:=Index; end; Result:=@FCurrent; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TVarJSONArray.JSONToString: WideString;var i:integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} //TODO: indenting? Result:=''; i:=v1; while (i<v2) do begin Result:=Result+','+JSONVarToStr1(FData[i]); inc(i); end; Result[1]:='['; Result:=Result+']'; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;{ TJSONArray }constructor TJSONArray.Create(Size: integer);begin inherited Create; SetLength(FData,Size);end;function TJSONArray.Count: integer;begin Result:=Length(FData);end;function TJSONArray.Get_Item(Index: integer): Variant;begin if (Index<0) or (Index>=Length(FData)) then raise ERangeError.Create('Out of range'); Result:=FData[Index];end;procedure TJSONArray.Set_Item(Index: integer; const Value: Variant);begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Index<0) or (Index>=Length(FData)) then raise ERangeError.Create('Out of range'); FData[Index]:=Value; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONArray.v0(Index: integer): pointer;begin if (Index<0) or (Index>=Length(FData)) then raise ERangeError.Create('Out of range'); Result:=@FData[Index];end;function TJSONArray.JSONToString: WideString;var i:integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} //TODO: indenting? Result:=''; i:=0; while (i<Length(FData)) do begin Result:=Result+','+JSONVarToStr1(FData[i]); inc(i); end; Result[1]:='['; Result:=Result+']'; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONArray.NewEnumerator: IJSONEnumerator;begin Result:=TJSONArrayEnumerator.Create(Self);end;{ TJSONArrayEnumerator }constructor TJSONArrayEnumerator.Create(const Data: IJSONArray);begin inherited Create; FData:=Data; FMax:=FData.Count; if FMax=0 then FIndex:=0 else FIndex:=-1;//see Next;end;destructor TJSONArrayEnumerator.Destroy;begin FData:=nil; inherited;end;function TJSONArrayEnumerator.EOF: boolean;begin Result:=not(FIndex<FMax);end;function TJSONArrayEnumerator.Get_Key: WideString;begin Result:=IntToStr(FIndex);end;function TJSONArrayEnumerator.Get_Value: Variant;begin Result:=FData[FIndex];end;function TJSONArrayEnumerator.Next: boolean;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} inc(FIndex); Result:=FIndex<FMax; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TJSONArrayEnumerator.Set_Value(const Value: Variant);begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} FData[FIndex]:=Value; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONArrayEnumerator.v0: pointer;begin Result:=FData.v0(FIndex);end;{ TJSONDocArray }constructor TJSONDocArray.Create;begin inherited Create; FItemsCount:=0; FItemsSize:=0;end;destructor TJSONDocArray.Destroy;begin SetLength(FItems,0); inherited;end;function TJSONDocArray.Get_Item(Index: integer): Variant;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Index<0) or (Index>=FItemsCount) then raise ERangeError.Create('Index out of range'); //parse from string here assuming this won't be needed much if FItems[Index]='null' then Result:=Null else Result:=JSON(FItems[Index]); {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocArray.v0(Index: integer): pointer;begin {$IFDEF JSONDOC_THREADSAFE} Result:=nil;//counter warning EnterCriticalSection(FLock); try {$ENDIF} if FCurrentIndex<>Index then begin if (Index<0) or (Index>=FItemsCount) then raise ERangeError.Create('Index out of range'); //parse from string here assuming this won't be needed much if FItems[Index]='null' then FCurrent:=Null else FCurrent:=JSON(FItems[Index]); FCurrentIndex:=Index; end; Result:=@FCurrent; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TJSONDocArray.Set_Item(Index: integer; const Value: Variant);var d:IJSONDocument;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Index<0) or (Index>=FItemsCount) then raise ERangeError.Create('Index out of range'); case TVarData(Value).VType of varNull: FItems[Index]:='null'; varUnknown: if (TVarData(Value).VUnknown<>nil) and (IUnknown(Value).QueryInterface(IID_IJSONDocument,d)=S_OK) then FItems[Index]:=d.ToString else raise EJSONEncodeException.Create( 'JSONDocArray.Set_Item requires IJSONDocument instances'); else raise EJSONEncodeException.Create( 'JSONDocArray.Set_Item requires IJSONDocument instances'); end; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocArray.Count: integer;begin Result:=FItemsCount;end;procedure TJSONDocArray.Clear;var i:integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} for i:=0 to FItemsCount-1 do FItems[i]:=''; FItemsCount:=0; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocArray.Add(const Doc: IJSONDocument): integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if FItemsCount=FItemsSize then begin inc(FItemsSize,$400);//grow SetLength(FItems,FItemsSize); end; //ToString here to save on persisting effort later if Doc=nil then FItems[FItemsCount]:='null' else FItems[FItemsCount]:=Doc.ToString; Result:=FItemsCount; inc(FItemsCount); {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocArray.AddJSON(const Data: WideString): integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if FItemsCount=FItemsSize then begin inc(FItemsSize,$400);//grow SetLength(FItems,FItemsSize); end; //TODO: check valid JSON? FItems[FItemsCount]:=Data; Result:=FItemsCount; inc(FItemsCount); {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;procedure TJSONDocArray.LoadItem(Index: integer; const Doc: IJSONDocument);begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Index<0) or (Index>=FItemsCount) then raise ERangeError.Create('Index out of range'); Doc.Clear; if FItems[Index]<>'null' then Doc.Parse(FItems[Index]); //else? {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocArray.GetJSON(Index: integer): WideString; stdcall;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if (Index<0) or (Index>=FItemsCount) then raise ERangeError.Create('Index out of range'); Result:=FItems[Index]; //else? {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;function TJSONDocArray.JSONToString: WideString;var i,x,l:integer;begin {$IFDEF JSONDOC_THREADSAFE} EnterCriticalSection(FLock); try {$ENDIF} if FItemsCount=0 then Result:='[]' else begin l:=FItemsCount+1; for i:=0 to FItemsCount-1 do inc(l,Length(FItems[i])); SetLength(Result,l); i:=0; x:=1; while i<FItemsCount do begin Result[x]:=','; inc(x); l:=Length(FItems[i]); Move(FItems[i][1],Result[x],l*2); inc(x,l); inc(i); end; Result[1]:='['; Result[x]:=']'; end; {$IFDEF JSONDOC_THREADSAFE} finally LeaveCriticalSection(FLock); end; {$ENDIF}end;{ JSON }function JSON:IJSONDocument; //overload;begin Result:=TJSONDocument.Create as IJSONDocument;end;function JSON(const x:array of Variant):IJSONDocument; //overload;var i,l,si,sl:integer; s:array of TJSONDocument; d:TJSONDocument; key:WideString;begin d:=TJSONDocument.Create; si:=0; sl:=0; i:=0; l:=Length(x); while i<l do begin key:=VarToWideStr(x[i]); inc(i); if (key<>'') and (key[1]='}') then begin while (key<>'') and (key[1]='}') do begin //pop from stack if si=0 then raise EJSONException.Create('JSON builder: closing more embedded documents than opened #'+IntToStr(i)) else begin dec(si); d:=s[si]; s[si]:=nil; end; key:=Copy(key,2,Length(key)-1); end; if key<>'' then raise EJSONException.Create('JSON builder: "}" not allowed as key prefix #'+IntToStr(i)); end else if (key<>'') and (key[Length(key)]='{') then begin //push on stack if si=sl then begin inc(sl,8);//growstep SetLength(s,sl); end; s[si]:=d; d:=TJSONDocument.Create; s[si][Copy(key,1,Length(key)-1)]:=d as IJSONDocument; inc(si); end else if i=l then raise EJSONException.Create('JSON builder: last key is missing value') else begin d[key]:=x[i]; inc(i); end; end; //any left open? if si=0 then Result:=d else Result:=s[si-1];end;function JSON(const x: Variant): IJSONDocument; overload;begin case TVarData(x).VType of varNull,varEmpty:Result:=nil;//raise? varOleStr,varString,$0102: begin Result:=TJSONDocument.Create as IJSONDocument; Result.Parse(VarToWideStr(x)); end; else Result:=IUnknown(x) as IJSONDocument; end;end;function JSONEnum(const x: IJSONDocument): IJSONEnumerator;var je:IJSONEnumerable;begin if x=nil then Result:=TJSONEnumerator.Create(nil) else //Result:=(x as IJSONEnumerable).NewEnumerator; if x.QueryInterface(IID_IJSONEnumerable,je)=S_OK then Result:=je.NewEnumerator else raise EJSONException.Create('IJSONDocument instance doesn''t implement IJSONEnumerable');end;function JSONEnum(const x: Variant): IJSONEnumerator;var vt:TVarType; e:IJSONEnumerable;begin vt:=TVarData(x).VType; if (vt and varArray)=0 then case vt of varNull,varEmpty: Result:=TJSONEnumerator.Create(nil);//has .EOF=true varUnknown: if (TVarData(x).VUnknown<>nil) and (IUnknown(x).QueryInterface(IID_IJSONEnumerable,e)=S_OK) then Result:=e.NewEnumerator else raise EJSONException.Create('No supported interface found on object'); else raise EJSONException.Create('Unsupported variant type '+IntToHex(vt,4)); end else Result:=TVarArrayEnumerator.Create(@x);end;function JSON(const x: IJSONEnumerator): IJSONDocument;begin Result:=IUnknown(x.Value) as IJSONDocument;end;function JSONEnum(const x: IJSONEnumerator): IJSONEnumerator;begin if (x=nil) or VarIsNull(x.Value) then Result:=TJSONEnumerator.Create(nil) else Result:=(IUnknown(x.Value) as IJSONEnumerable).NewEnumerator;end;function ja(const Items:array of Variant): IJSONArray;var a:TJSONArray; i,l:integer;begin l:=Length(Items); a:=TJSONArray.Create(l); i:=0; while i<>l do begin a.FData[i]:=Items[i]; inc(i); end; Result:=a;end;function ja(const Item:Variant): IJSONArray;begin if (TVarData(Item).VType=varUnknown) and (TVarData(Item).VUnknown<>nil) and (IUnknown(Item).QueryInterface(IID_IJSONArray,Result)=S_OK) then //ok! else if (TVarData(Item).VType and varArray)<>0 then Result:=TVarJSONArray.Create(Item) else raise EJSONException.Create('Variant is not IJSONArray');end;function JSONDocArray: IJSONDocArray;begin Result:=TJSONDocArray.Create;end;function JSONDocArray(const Items:array of IJSONDocument): IJSONDocArray;var i:integer;begin Result:=TJSONDocArray.Create; for i:=0 to Length(Items)-1 do Result.Add(Items[i]);end;initialization {$IFDEF JSONDOC_DEFAULT_USE_IJSONARRAY} JSON_UseIJSONArray:=true; //default, see TJSONDocument.Create {$ELSE} JSON_UseIJSONArray:=false; //default, see TJSONDocument.Create {$ENDIF}end. |
本文来自博客园，作者：{咏南中间件}，转载请注明原文链接：https://www.cnblogs.com/hnxxcxg/p/13634001.html
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