client/3.0/FB30ClientAPI.pas

(*
 *  Firebird Interface (fbintf). The fbintf components provide a set of
 *  Pascal language bindings for the Firebird API.
 *
 *  The contents of this file are subject to the Initial Developer's
 *  Public License Version 1.0 (the "License"); you may not use this
 *  file except in compliance with the License. You may obtain a copy
 *  of the License here:
 *
 *    http://www.firebirdsql.org/index.php?op=doc&id=idpl
 *
 *  Software distributed under the License is distributed on an "AS
 *  IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 *  implied. See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Initial Developer of the Original Code is Tony Whyman.
 *
 *  The Original Code is (C) 2016 Tony Whyman, MWA Software
 *  (http://www.mwasoftware.co.uk).
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): ______________________________________.
 *
*)
unit FB30ClientAPI;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

{$IFDEF FPC}
{$mode delphi}
{$interfaces COM}
{$ENDIF}

interface

uses
  Classes, SysUtils, FBClientAPI, Firebird, IB, IBExternals;

type

  { TFB30Status }

  TFB30Status = class(TFBStatus,IStatus)
  private
    FStatus: Firebird.IStatus;
  public
    procedure Init;
    function InErrorState: boolean;
    function GetStatus: Firebird.IStatus;
    function StatusVector: PStatusVector; override;
  end;

  Tfb_get_master_interface = function: IMaster;
                              {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}

  { TFB30ClientAPI }

  TFB30ClientAPI = class(TFBClientAPI,IFirebirdAPI)
  private
    FMaster: Firebird.IMaster;
    FUtil: Firebird.IUtil;
    FProvider: Firebird.IProvider;
    FConfigManager: Firebird.IConfigManager;
    FStatus: TFB30Status;
    FIsEmbeddedServer: boolean;
    FStatusIntf: IStatus;   {Keep a reference to the interface - automatic destroy
                             when this class is freed and last reference to IStatus
                             goes out of scope.}
    procedure CheckPlugins;
  protected
    {$IFDEF UNIX}
    function GetFirebirdLibList: string; override;
    {$ENDIF}
   procedure LoadInterface; override;
  public
    constructor Create;
    destructor Destroy; override;

    function StatusIntf: Firebird.IStatus;
    procedure Check4DataBaseError;
    function InErrorState: boolean;

  public
    {IFirebirdAPI}
    function GetStatus: IStatus; override;
    function AllocateDPB: IDPB;
    function AllocateTPB: ITPB;

    {Database connections}
    function OpenDatabase(DatabaseName: AnsiString; DPB: IDPB; RaiseExceptionOnConnectError: boolean=true): IAttachment;
    function CreateDatabase(DatabaseName: AnsiString; DPB: IDPB; RaiseExceptionOnError: boolean=true): IAttachment; overload;
    function CreateDatabase(sql: AnsiString; aSQLDialect: integer; RaiseExceptionOnError: boolean=true): IAttachment; overload;
    {Start Transaction against multiple databases}
    function StartTransaction(Attachments: array of IAttachment;
             TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; overload;
    function StartTransaction(Attachments: array of IAttachment;
             TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; overload;

    {Service Manager}
    function AllocateSPB: ISPB;
    function GetServiceManager(ServerName: AnsiString; Protocol: TProtocol; SPB: ISPB): IServiceManager;

    {Information}
    function HasServiceAPI: boolean;
    function HasRollbackRetaining: boolean;
    function IsEmbeddedServer: boolean; override;
    function GetImplementationVersion: AnsiString;

    {Firebird 3 API}
    function HasMasterIntf: boolean;
    function GetIMaster: TObject;

    {Encode/Decode}
    function DecodeInteger(bufptr: PByte; len: short): integer; override;
    procedure SQLEncodeDate(aDate: TDateTime; bufptr: PByte); override;
    function SQLDecodeDate(bufptr: PByte): TDateTime; override;
    procedure SQLEncodeTime(aTime: TDateTime; bufptr: PByte); override;
    function SQLDecodeTime(bufptr: PByte): TDateTime;  override;
    procedure SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte); override;
    function SQLDecodeDateTime(bufptr: PByte): TDateTime; override;

    {Firebird Interfaces}
    property MasterIntf: Firebird.IMaster read FMaster;
    property UtilIntf: Firebird.IUtil read FUtil;
    property ProviderIntf: Firebird.IProvider read FProvider;
  end;

var Firebird30ClientAPI: TFB30ClientAPI;

implementation

uses FBParamBlock, FB30Attachment, {$IFDEF FPC}dynlibs{$ELSE} windows{$ENDIF},
     FBMessages, FB30Services, FB30Transaction;

type
  PISC_DATE = ^ISC_DATE;
  PISC_TIME = ^ISC_TIME;

{ TFB30Status }

procedure TFB30Status.Init;
begin
  if assigned(FStatus) then
    FStatus.Init;
end;

function TFB30Status.InErrorState: boolean;
begin
  with GetStatus do
    Result := ((getState and STATE_ERRORS) <> 0);
end;

function TFB30Status.GetStatus: Firebird.IStatus;
begin
  if FStatus = nil then
  with FOwner do
    FStatus := (FOwner as TFB30ClientAPI).MasterIntf.GetStatus;
  Result := FStatus;
end;

function TFB30Status.StatusVector: PStatusVector;
begin
  Result := PStatusVector(GetStatus.getErrors);
end;

{ TFB30ClientAPI }

procedure TFB30ClientAPI.CheckPlugins;
var FBConf: Firebird.IFirebirdConf;
    Plugins: AnsiString;
    PluginsList: TStringList;
begin
  FIsEmbeddedServer := false;
  FBConf := FConfigManager.getFirebirdConf;
  try
    Plugins := FBConf.asString(FBConf.getKey('Providers'));
  finally
    FBConf.release;
  end;
  if Plugins = '' then Exit;

  PluginsList := TStringList.Create;
  try
    PluginsList.CommaText := Plugins;
    FIsEmbeddedServer := PluginsList.IndexOf('Engine12') <> -1;
  finally
    PluginsList.Free;
  end;
end;

{$IFDEF UNIX}
function TFB30ClientAPI.GetFirebirdLibList: string;
begin
  Result := 'libfbclient.so:libfbclient.so.2';
end;
{$ENDIF}

procedure TFB30ClientAPI.LoadInterface;
var
  fb_get_master_interface: Tfb_get_master_interface;
begin
  inherited LoadInterface;
  fb_get_master_interface := GetProcAddress(IBLibrary, 'fb_get_master_interface'); {do not localize}
  if assigned(fb_get_master_interface) then
  begin
    FMaster := fb_get_master_interface;
    FUtil := FMaster.getUtilInterface;
    FProvider := FMaster.getDispatcher;
    FConfigManager := FMaster.getConfigManager;
    CheckPlugins;
  end;
end;

constructor TFB30ClientAPI.Create;
begin
  inherited;
  FStatus := TFB30Status.Create(self);
  FStatusIntf := FStatus;
  Firebird30ClientAPI := self;
end;

destructor TFB30ClientAPI.Destroy;
begin
  if assigned(FProvider) then
    FProvider.release;
  inherited Destroy;
end;

function TFB30ClientAPI.StatusIntf: Firebird.IStatus;
begin
  Result := FStatus.GetStatus;
  Result.Init;
end;

procedure TFB30ClientAPI.Check4DataBaseError;
begin
  if FStatus.InErrorState then
    IBDataBaseError;
end;

function TFB30ClientAPI.InErrorState: boolean;
begin
  Result := FStatus.InErrorState;
end;

function TFB30ClientAPI.GetStatus: IStatus;
begin
  Result := FStatusIntf;
end;

function TFB30ClientAPI.AllocateDPB: IDPB;
begin
  Result := TDPB.Create;
end;

function TFB30ClientAPI.AllocateTPB: ITPB;
begin
  Result := TTPB.Create;
end;

function TFB30ClientAPI.OpenDatabase(DatabaseName: AnsiString; DPB: IDPB;
  RaiseExceptionOnConnectError: boolean): IAttachment;
begin
  Result := TFB30Attachment.Create(DatabaseName, DPB, RaiseExceptionOnConnectError);
  if not Result.IsConnected then
    Result := nil;
end;

function TFB30ClientAPI.CreateDatabase(DatabaseName: AnsiString; DPB: IDPB;
  RaiseExceptionOnError: boolean): IAttachment;
begin
  Result := TFB30Attachment.CreateDatabase(DatabaseName,DPB, RaiseExceptionOnError);
  if not Result.IsConnected then
    Result := nil;
end;

function TFB30ClientAPI.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
  RaiseExceptionOnError: boolean): IAttachment;
begin
  Result := TFB30Attachment.CreateDatabase(sql,aSQLDialect, RaiseExceptionOnError);
  if not Result.IsConnected then
    Result := nil;
end;

function TFB30ClientAPI.StartTransaction(Attachments: array of IAttachment;
  TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction;
begin
  Result := TFB30Transaction.Create(Attachments,TPB,DefaultCompletion);
end;

function TFB30ClientAPI.StartTransaction(Attachments: array of IAttachment;
  TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction;
begin
  Result := TFB30Transaction.Create(Attachments,TPB,DefaultCompletion);
end;

function TFB30ClientAPI.AllocateSPB: ISPB;
begin
  Result := TSPB.Create;
end;

function TFB30ClientAPI.GetServiceManager(ServerName: AnsiString;
  Protocol: TProtocol; SPB: ISPB): IServiceManager;
begin
  Result := TFB30ServiceManager.Create(ServerName,Protocol,SPB);
end;

function TFB30ClientAPI.HasServiceAPI: boolean;
begin
  Result := true;
end;

function TFB30ClientAPI.HasMasterIntf: boolean;
begin
  Result := MasterIntf <> nil;
end;

function TFB30ClientAPI.GetIMaster: TObject;
begin
  Result := FMaster;
end;

function TFB30ClientAPI.HasRollbackRetaining: boolean;
begin
  Result := true;
end;

function TFB30ClientAPI.IsEmbeddedServer: boolean;
begin
  Result := FIsEmbeddedServer;
end;

function TFB30ClientAPI.GetImplementationVersion: AnsiString;
begin
  Result := Format('3.%d',[UtilIntf.GetClientVersion]);
end;

function TFB30ClientAPI.DecodeInteger(bufptr: PByte; len: short): integer;
var P: PByte;
begin
  Result := 0;
  P := Bufptr + len - 1;
  while P >= bufptr do
  begin
    Result := (Result shl 8 ) or P^;
    Dec(P);
  end;
end;

procedure TFB30ClientAPI.SQLEncodeDate(aDate: TDateTime; bufptr: PByte);
var
  Yr, Mn, Dy: Word;
begin
   DecodeDate(aDate, Yr, Mn, Dy);
   PISC_Date(Bufptr)^ := UtilIntf.encodeDate(Yr, Mn, Dy);
end;

function TFB30ClientAPI.SQLDecodeDate(bufptr: PByte): TDateTime;
var
  Yr, Mn, Dy: cardinal;
begin
  UtilIntf.decodeDate(PISC_DATE(bufptr)^,@Yr, @Mn, @Dy);
  try
    result := EncodeDate(Yr, Mn,Dy);
  except
    on E: EConvertError do begin
      IBError(ibxeInvalidDataConversion, [nil]);
    end;
  end;
end;

procedure TFB30ClientAPI.SQLEncodeTime(aTime: TDateTime; bufptr: PByte);
var
  Hr, Mt, S, Ms: Word;
begin
  DecodeTime(aTime, Hr, Mt, S, Ms);
  PISC_TIME(bufptr)^ :=  UtilIntf.encodeTime(Hr, Mt, S, Ms*10);
end;

function TFB30ClientAPI.SQLDecodeTime(bufptr: PByte): TDateTime;
var
  Hr, Mt, S, Ms: cardinal;
begin
  UtilIntf.decodeTime(PISC_TIME(bufptr)^,@Hr, @Mt, @S, @Ms);
  try
    Result := EncodeTime(Hr, Mt, S, Ms div 10);
  except
    on E: EConvertError do begin
      IBError(ibxeInvalidDataConversion, [nil]);
    end;
  end;
end;

procedure TFB30ClientAPI.SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte);
begin
  SQLEncodeDate(aDateTime,bufPtr);
  Inc(bufptr,sizeof(ISC_DATE));
  SQLEncodeTime(aDateTime,bufPtr);
end;

function TFB30ClientAPI.SQLDecodeDateTime(bufptr: PByte): TDateTime;
begin
  Result := SQLDecodeDate(bufPtr);
  Inc(bufptr,sizeof(ISC_DATE));
  Result := Result + SQLDecodeTime(bufPtr);
end;

end.


Revision:	56
Committed:	Mon Mar 6 10:20:02 2017 UTC (7 years, 1 month ago) by tony
Content type:	text/x-pascal
File size:	11034 byte(s)
Log Message:	Committing updates for Trunk
#	User	Rev	Content
1	tony	45	(*
2			* Firebird Interface (fbintf). The fbintf components provide a set of
3			* Pascal language bindings for the Firebird API.
4			*
5			* The contents of this file are subject to the Initial Developer's
6			* Public License Version 1.0 (the "License"); you may not use this
7			* file except in compliance with the License. You may obtain a copy
8			* of the License here:
9			*
10			* http://www.firebirdsql.org/index.php?op=doc&id=idpl
11			*
12			* Software distributed under the License is distributed on an "AS
13			* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
14			* implied. See the License for the specific language governing rights
15			* and limitations under the License.
16			*
17			* The Initial Developer of the Original Code is Tony Whyman.
18			*
19			* The Original Code is (C) 2016 Tony Whyman, MWA Software
20			* (http://www.mwasoftware.co.uk).
21			*
22			* All Rights Reserved.
23			*
24			* Contributor(s): ______________________________________.
25			*
26			*)
27			unit FB30ClientAPI;
28	tony	56	{$IFDEF MSWINDOWS}
29			{$DEFINE WINDOWS}
30			{$ENDIF}
31	tony	45
32			{$IFDEF FPC}
33			{$mode delphi}
34			{$interfaces COM}
35			{$ENDIF}
36
37			interface
38
39			uses
40			Classes, SysUtils, FBClientAPI, Firebird, IB, IBExternals;
41
42			type
43
44			{ TFB30Status }
45
46			TFB30Status = class(TFBStatus,IStatus)
47			private
48			FStatus: Firebird.IStatus;
49			public
50			procedure Init;
51			function InErrorState: boolean;
52			function GetStatus: Firebird.IStatus;
53			function StatusVector: PStatusVector; override;
54			end;
55
56			Tfb_get_master_interface = function: IMaster;
57			{$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
58
59			{ TFB30ClientAPI }
60
61			TFB30ClientAPI = class(TFBClientAPI,IFirebirdAPI)
62			private
63			FMaster: Firebird.IMaster;
64			FUtil: Firebird.IUtil;
65			FProvider: Firebird.IProvider;
66			FConfigManager: Firebird.IConfigManager;
67			FStatus: TFB30Status;
68			FIsEmbeddedServer: boolean;
69			FStatusIntf: IStatus; {Keep a reference to the interface - automatic destroy
70			when this class is freed and last reference to IStatus
71			goes out of scope.}
72			procedure CheckPlugins;
73			protected
74			{$IFDEF UNIX}
75			function GetFirebirdLibList: string; override;
76			{$ENDIF}
77			procedure LoadInterface; override;
78			public
79			constructor Create;
80			destructor Destroy; override;
81
82			function StatusIntf: Firebird.IStatus;
83			procedure Check4DataBaseError;
84			function InErrorState: boolean;
85
86			public
87			{IFirebirdAPI}
88			function GetStatus: IStatus; override;
89			function AllocateDPB: IDPB;
90			function AllocateTPB: ITPB;
91
92			{Database connections}
93	tony	56	function OpenDatabase(DatabaseName: AnsiString; DPB: IDPB; RaiseExceptionOnConnectError: boolean=true): IAttachment;
94			function CreateDatabase(DatabaseName: AnsiString; DPB: IDPB; RaiseExceptionOnError: boolean=true): IAttachment; overload;
95			function CreateDatabase(sql: AnsiString; aSQLDialect: integer; RaiseExceptionOnError: boolean=true): IAttachment; overload;
96	tony	45	{Start Transaction against multiple databases}
97			function StartTransaction(Attachments: array of IAttachment;
98			TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; overload;
99			function StartTransaction(Attachments: array of IAttachment;
100			TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; overload;
101
102			{Service Manager}
103			function AllocateSPB: ISPB;
104	tony	56	function GetServiceManager(ServerName: AnsiString; Protocol: TProtocol; SPB: ISPB): IServiceManager;
105	tony	45
106			{Information}
107			function HasServiceAPI: boolean;
108			function HasRollbackRetaining: boolean;
109			function IsEmbeddedServer: boolean; override;
110	tony	56	function GetImplementationVersion: AnsiString;
111	tony	45
112			{Firebird 3 API}
113			function HasMasterIntf: boolean;
114			function GetIMaster: TObject;
115
116			{Encode/Decode}
117	tony	56	function DecodeInteger(bufptr: PByte; len: short): integer; override;
118			procedure SQLEncodeDate(aDate: TDateTime; bufptr: PByte); override;
119			function SQLDecodeDate(bufptr: PByte): TDateTime; override;
120			procedure SQLEncodeTime(aTime: TDateTime; bufptr: PByte); override;
121			function SQLDecodeTime(bufptr: PByte): TDateTime; override;
122			procedure SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte); override;
123			function SQLDecodeDateTime(bufptr: PByte): TDateTime; override;
124	tony	45
125			{Firebird Interfaces}
126			property MasterIntf: Firebird.IMaster read FMaster;
127			property UtilIntf: Firebird.IUtil read FUtil;
128			property ProviderIntf: Firebird.IProvider read FProvider;
129			end;
130
131			var Firebird30ClientAPI: TFB30ClientAPI;
132
133			implementation
134
135	tony	56	uses FBParamBlock, FB30Attachment, {$IFDEF FPC}dynlibs{$ELSE} windows{$ENDIF},
136			FBMessages, FB30Services, FB30Transaction;
137	tony	45
138			type
139			PISC_DATE = ^ISC_DATE;
140			PISC_TIME = ^ISC_TIME;
141
142			{ TFB30Status }
143
144			procedure TFB30Status.Init;
145			begin
146			if assigned(FStatus) then
147			FStatus.Init;
148			end;
149
150			function TFB30Status.InErrorState: boolean;
151			begin
152			with GetStatus do
153			Result := ((getState and STATE_ERRORS) <> 0);
154			end;
155
156			function TFB30Status.GetStatus: Firebird.IStatus;
157			begin
158			if FStatus = nil then
159			with FOwner do
160			FStatus := (FOwner as TFB30ClientAPI).MasterIntf.GetStatus;
161			Result := FStatus;
162			end;
163
164			function TFB30Status.StatusVector: PStatusVector;
165			begin
166			Result := PStatusVector(GetStatus.getErrors);
167			end;
168
169			{ TFB30ClientAPI }
170
171			procedure TFB30ClientAPI.CheckPlugins;
172			var FBConf: Firebird.IFirebirdConf;
173	tony	56	Plugins: AnsiString;
174	tony	45	PluginsList: TStringList;
175			begin
176			FIsEmbeddedServer := false;
177			FBConf := FConfigManager.getFirebirdConf;
178			try
179			Plugins := FBConf.asString(FBConf.getKey('Providers'));
180			finally
181			FBConf.release;
182			end;
183			if Plugins = '' then Exit;
184
185			PluginsList := TStringList.Create;
186			try
187			PluginsList.CommaText := Plugins;
188			FIsEmbeddedServer := PluginsList.IndexOf('Engine12') <> -1;
189			finally
190			PluginsList.Free;
191			end;
192			end;
193
194			{$IFDEF UNIX}
195			function TFB30ClientAPI.GetFirebirdLibList: string;
196			begin
197			Result := 'libfbclient.so:libfbclient.so.2';
198			end;
199			{$ENDIF}
200
201			procedure TFB30ClientAPI.LoadInterface;
202			var
203			fb_get_master_interface: Tfb_get_master_interface;
204			begin
205			inherited LoadInterface;
206			fb_get_master_interface := GetProcAddress(IBLibrary, 'fb_get_master_interface'); {do not localize}
207			if assigned(fb_get_master_interface) then
208			begin
209			FMaster := fb_get_master_interface;
210			FUtil := FMaster.getUtilInterface;
211			FProvider := FMaster.getDispatcher;
212			FConfigManager := FMaster.getConfigManager;
213			CheckPlugins;
214			end;
215			end;
216
217			constructor TFB30ClientAPI.Create;
218			begin
219			inherited;
220			FStatus := TFB30Status.Create(self);
221			FStatusIntf := FStatus;
222			Firebird30ClientAPI := self;
223			end;
224
225			destructor TFB30ClientAPI.Destroy;
226			begin
227			if assigned(FProvider) then
228			FProvider.release;
229			inherited Destroy;
230			end;
231
232			function TFB30ClientAPI.StatusIntf: Firebird.IStatus;
233			begin
234			Result := FStatus.GetStatus;
235			Result.Init;
236			end;
237
238			procedure TFB30ClientAPI.Check4DataBaseError;
239			begin
240			if FStatus.InErrorState then
241			IBDataBaseError;
242			end;
243
244			function TFB30ClientAPI.InErrorState: boolean;
245			begin
246			Result := FStatus.InErrorState;
247			end;
248
249			function TFB30ClientAPI.GetStatus: IStatus;
250			begin
251			Result := FStatusIntf;
252			end;
253
254			function TFB30ClientAPI.AllocateDPB: IDPB;
255			begin
256			Result := TDPB.Create;
257			end;
258
259			function TFB30ClientAPI.AllocateTPB: ITPB;
260			begin
261			Result := TTPB.Create;
262			end;
263
264	tony	56	function TFB30ClientAPI.OpenDatabase(DatabaseName: AnsiString; DPB: IDPB;
265	tony	45	RaiseExceptionOnConnectError: boolean): IAttachment;
266			begin
267			Result := TFB30Attachment.Create(DatabaseName, DPB, RaiseExceptionOnConnectError);
268			if not Result.IsConnected then
269			Result := nil;
270			end;
271
272	tony	56	function TFB30ClientAPI.CreateDatabase(DatabaseName: AnsiString; DPB: IDPB;
273	tony	45	RaiseExceptionOnError: boolean): IAttachment;
274			begin
275			Result := TFB30Attachment.CreateDatabase(DatabaseName,DPB, RaiseExceptionOnError);
276			if not Result.IsConnected then
277			Result := nil;
278			end;
279
280	tony	56	function TFB30ClientAPI.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
281	tony	47	RaiseExceptionOnError: boolean): IAttachment;
282			begin
283			Result := TFB30Attachment.CreateDatabase(sql,aSQLDialect, RaiseExceptionOnError);
284			if not Result.IsConnected then
285			Result := nil;
286			end;
287
288	tony	45	function TFB30ClientAPI.StartTransaction(Attachments: array of IAttachment;
289			TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction;
290			begin
291			Result := TFB30Transaction.Create(Attachments,TPB,DefaultCompletion);
292			end;
293
294			function TFB30ClientAPI.StartTransaction(Attachments: array of IAttachment;
295			TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction;
296			begin
297			Result := TFB30Transaction.Create(Attachments,TPB,DefaultCompletion);
298			end;
299
300			function TFB30ClientAPI.AllocateSPB: ISPB;
301			begin
302			Result := TSPB.Create;
303			end;
304
305	tony	56	function TFB30ClientAPI.GetServiceManager(ServerName: AnsiString;
306	tony	45	Protocol: TProtocol; SPB: ISPB): IServiceManager;
307			begin
308			Result := TFB30ServiceManager.Create(ServerName,Protocol,SPB);
309			end;
310
311			function TFB30ClientAPI.HasServiceAPI: boolean;
312			begin
313			Result := true;
314			end;
315
316			function TFB30ClientAPI.HasMasterIntf: boolean;
317			begin
318			Result := MasterIntf <> nil;
319			end;
320
321			function TFB30ClientAPI.GetIMaster: TObject;
322			begin
323			Result := FMaster;
324			end;
325
326			function TFB30ClientAPI.HasRollbackRetaining: boolean;
327			begin
328			Result := true;
329			end;
330
331			function TFB30ClientAPI.IsEmbeddedServer: boolean;
332			begin
333			Result := FIsEmbeddedServer;
334			end;
335
336	tony	56	function TFB30ClientAPI.GetImplementationVersion: AnsiString;
337	tony	45	begin
338			Result := Format('3.%d',[UtilIntf.GetClientVersion]);
339			end;
340
341	tony	56	function TFB30ClientAPI.DecodeInteger(bufptr: PByte; len: short): integer;
342			var P: PByte;
343	tony	45	begin
344			Result := 0;
345			P := Bufptr + len - 1;
346			while P >= bufptr do
347			begin
348	tony	56	Result := (Result shl 8 ) or P^;
349	tony	45	Dec(P);
350			end;
351			end;
352
353	tony	56	procedure TFB30ClientAPI.SQLEncodeDate(aDate: TDateTime; bufptr: PByte);
354	tony	45	var
355			Yr, Mn, Dy: Word;
356			begin
357			DecodeDate(aDate, Yr, Mn, Dy);
358			PISC_Date(Bufptr)^ := UtilIntf.encodeDate(Yr, Mn, Dy);
359			end;
360
361	tony	56	function TFB30ClientAPI.SQLDecodeDate(bufptr: PByte): TDateTime;
362	tony	45	var
363	tony	56	Yr, Mn, Dy: cardinal;
364	tony	45	begin
365			UtilIntf.decodeDate(PISC_DATE(bufptr)^,@Yr, @Mn, @Dy);
366			try
367			result := EncodeDate(Yr, Mn,Dy);
368			except
369			on E: EConvertError do begin
370			IBError(ibxeInvalidDataConversion, [nil]);
371			end;
372			end;
373			end;
374
375	tony	56	procedure TFB30ClientAPI.SQLEncodeTime(aTime: TDateTime; bufptr: PByte);
376	tony	45	var
377			Hr, Mt, S, Ms: Word;
378			begin
379			DecodeTime(aTime, Hr, Mt, S, Ms);
380			PISC_TIME(bufptr)^ := UtilIntf.encodeTime(Hr, Mt, S, Ms*10);
381			end;
382
383	tony	56	function TFB30ClientAPI.SQLDecodeTime(bufptr: PByte): TDateTime;
384	tony	45	var
385	tony	56	Hr, Mt, S, Ms: cardinal;
386	tony	45	begin
387			UtilIntf.decodeTime(PISC_TIME(bufptr)^,@Hr, @Mt, @S, @Ms);
388			try
389			Result := EncodeTime(Hr, Mt, S, Ms div 10);
390			except
391			on E: EConvertError do begin
392			IBError(ibxeInvalidDataConversion, [nil]);
393			end;
394			end;
395			end;
396
397	tony	56	procedure TFB30ClientAPI.SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte);
398	tony	45	begin
399			SQLEncodeDate(aDateTime,bufPtr);
400			Inc(bufptr,sizeof(ISC_DATE));
401			SQLEncodeTime(aDateTime,bufPtr);
402			end;
403
404	tony	56	function TFB30ClientAPI.SQLDecodeDateTime(bufptr: PByte): TDateTime;
405	tony	45	begin
406			Result := SQLDecodeDate(bufPtr);
407			Inc(bufptr,sizeof(ISC_DATE));
408	tony	56	Result := Result + SQLDecodeTime(bufPtr);
409	tony	45	end;
410
411			end.
412
413	tony	56