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
#	Content
1	(*
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	{$IFDEF MSWINDOWS}
29	{$DEFINE WINDOWS}
30	{$ENDIF}
31
32	{$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	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	{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	function GetServiceManager(ServerName: AnsiString; Protocol: TProtocol; SPB: ISPB): IServiceManager;
105
106	{Information}
107	function HasServiceAPI: boolean;
108	function HasRollbackRetaining: boolean;
109	function IsEmbeddedServer: boolean; override;
110	function GetImplementationVersion: AnsiString;
111
112	{Firebird 3 API}
113	function HasMasterIntf: boolean;
114	function GetIMaster: TObject;
115
116	{Encode/Decode}
117	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
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	uses FBParamBlock, FB30Attachment, {$IFDEF FPC}dynlibs{$ELSE} windows{$ENDIF},
136	FBMessages, FB30Services, FB30Transaction;
137
138	type
139	PISC_DATE = ^ISC_DATE;
140	PISC_TIME = ^ISC_TIME;
141
142	{ TFB30Status }
143
144	procedure TFB30Status.Init;
145	begin
146	if assigned(FStatus) then
147	FStatus.Init;
148	end;
149
150	function TFB30Status.InErrorState: boolean;
151	begin
152	with GetStatus do
153	Result := ((getState and STATE_ERRORS) <> 0);
154	end;
155
156	function TFB30Status.GetStatus: Firebird.IStatus;
157	begin
158	if FStatus = nil then
159	with FOwner do
160	FStatus := (FOwner as TFB30ClientAPI).MasterIntf.GetStatus;
161	Result := FStatus;
162	end;
163
164	function TFB30Status.StatusVector: PStatusVector;
165	begin
166	Result := PStatusVector(GetStatus.getErrors);
167	end;
168
169	{ TFB30ClientAPI }
170
171	procedure TFB30ClientAPI.CheckPlugins;
172	var FBConf: Firebird.IFirebirdConf;
173	Plugins: AnsiString;
174	PluginsList: TStringList;
175	begin
176	FIsEmbeddedServer := false;
177	FBConf := FConfigManager.getFirebirdConf;
178	try
179	Plugins := FBConf.asString(FBConf.getKey('Providers'));
180	finally
181	FBConf.release;
182	end;
183	if Plugins = '' then Exit;
184
185	PluginsList := TStringList.Create;
186	try
187	PluginsList.CommaText := Plugins;
188	FIsEmbeddedServer := PluginsList.IndexOf('Engine12') <> -1;
189	finally
190	PluginsList.Free;
191	end;
192	end;
193
194	{$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	function TFB30ClientAPI.OpenDatabase(DatabaseName: AnsiString; DPB: IDPB;
265	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	function TFB30ClientAPI.CreateDatabase(DatabaseName: AnsiString; DPB: IDPB;
273	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	function TFB30ClientAPI.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
281	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	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	function TFB30ClientAPI.GetServiceManager(ServerName: AnsiString;
306	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	function TFB30ClientAPI.GetImplementationVersion: AnsiString;
337	begin
338	Result := Format('3.%d',[UtilIntf.GetClientVersion]);
339	end;
340
341	function TFB30ClientAPI.DecodeInteger(bufptr: PByte; len: short): integer;
342	var P: PByte;
343	begin
344	Result := 0;
345	P := Bufptr + len - 1;
346	while P >= bufptr do
347	begin
348	Result := (Result shl 8 ) or P^;
349	Dec(P);
350	end;
351	end;
352
353	procedure TFB30ClientAPI.SQLEncodeDate(aDate: TDateTime; bufptr: PByte);
354	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	function TFB30ClientAPI.SQLDecodeDate(bufptr: PByte): TDateTime;
362	var
363	Yr, Mn, Dy: cardinal;
364	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	procedure TFB30ClientAPI.SQLEncodeTime(aTime: TDateTime; bufptr: PByte);
376	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	function TFB30ClientAPI.SQLDecodeTime(bufptr: PByte): TDateTime;
384	var
385	Hr, Mt, S, Ms: cardinal;
386	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	procedure TFB30ClientAPI.SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte);
398	begin
399	SQLEncodeDate(aDateTime,bufPtr);
400	Inc(bufptr,sizeof(ISC_DATE));
401	SQLEncodeTime(aDateTime,bufPtr);
402	end;
403
404	function TFB30ClientAPI.SQLDecodeDateTime(bufptr: PByte): TDateTime;
405	begin
406	Result := SQLDecodeDate(bufPtr);
407	Inc(bufptr,sizeof(ISC_DATE));
408	Result := Result + SQLDecodeTime(bufPtr);
409	end;
410
411	end.
412
413