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(*
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* Firebird Interface (fbintf). The fbintf components provide a set of
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* Pascal language bindings for the Firebird API. Although predominantly
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* a new development they include source code taken from IBX and may be
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* considered a derived product. This software thus also includes the copyright
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* notice and license conditions from IBX.
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*
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* Except for those parts dervied from IBX, contents of this file are subject
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* to the Initial Developer's Public License Version 1.0 (the "License"); you
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* may not use this file except in compliance with the License. You may obtain a
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* copy of the License here:
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*
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* http://www.firebirdsql.org/index.php?op=doc&id=idpl
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Initial Developer of the Original Code is Tony Whyman.
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*
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* The Original Code is (C) 2016 Tony Whyman, MWA Software
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* (http://www.mwasoftware.co.uk).
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*
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* All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*
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*)
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{************************************************************************}
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{ }
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{ Borland Delphi Visual Component Library }
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{ InterBase Express core components }
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{ }
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{ Copyright (c) 1998-2000 Inprise Corporation }
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{ }
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{ InterBase Express is based in part on the product }
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{ Free IB Components, written by Gregory H. Deatz for }
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{ Hoagland, Longo, Moran, Dunst & Doukas Company. }
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{ Free IB Components is used under license. }
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{ }
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{ The contents of this file are subject to the InterBase }
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{ Public License Version 1.0 (the "License"); you may not }
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{ use this file except in compliance with the License. You }
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{ may obtain a copy of the License at http://www.Inprise.com/IPL.html }
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{ Software distributed under the License is distributed on }
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{ an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either }
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{ express or implied. See the License for the specific language }
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{ governing rights and limitations under the License. }
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{ The Original Code was created by InterBase Software Corporation }
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{ and its successors. }
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{ Portions created by Inprise Corporation are Copyright (C) Inprise }
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{ Corporation. All Rights Reserved. }
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{ Contributor(s): Jeff Overcash }
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{ }
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{ IBX For Lazarus (Firebird Express) }
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{ Contributor: Tony Whyman, MWA Software http://www.mwasoftware.co.uk }
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{ Portions created by MWA Software are copyright McCallum Whyman }
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{ Associates Ltd 2011 - 2015 }
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{ }
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{************************************************************************}
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unit FBClientAPI;
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{$IFDEF MSWINDOWS}
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{$DEFINE WINDOWS}
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{$ENDIF}
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{$IFDEF FPC}
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{$mode delphi}
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{$codepage UTF8}
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{$interfaces COM}
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{$ENDIF}
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interface
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uses
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Classes,
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{$IFDEF WINDOWS}Windows, {$ENDIF}
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{$IFDEF FPC} Dynlibs, {$ENDIF}
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IB, IBHeader, FBActivityMonitor, FBMessages, IBExternals, FmtBCD;
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{For Linux see result of GetFirebirdLibListruntime/nongui/winipc.inc method}
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{$IFDEF DARWIN}
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const
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FIREBIRD_SO2 = 'libfbclient.dylib';
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{$ENDIF}
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{$IFDEF WINDOWS}
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const
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IBASE_DLL = 'gds32.dll';
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FIREBIRD_CLIENT = 'fbclient.dll'; {do not localize}
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FIREBIRD_EMBEDDED = 'fbembed.dll';
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{$ENDIF}
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const
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{fb_shutdown reasons}
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fb_shutrsn_svc_stopped = -1;
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fb_shutrsn_no_connection = -2;
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fb_shutrsn_app_stopped = -3;
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fb_shutrsn_signal = -5;
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fb_shutrsn_services = -6;
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fb_shutrsn_exit_called = -7;
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const
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DefaultTimeZoneFile = '/etc/timezone';
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const
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IBLocalBufferLength = 512;
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IBBigLocalBufferLength = IBLocalBufferLength * 2;
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IBHugeLocalBufferLength = IBBigLocalBufferLength * 20;
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type
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TStatusVector = array[0..19] of NativeInt;
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PStatusVector = ^TStatusVector;
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TFBClientAPI = class;
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{ TFBStatus }
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TFBStatus = class(TFBInterfacedObject, IStatus)
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private
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FIBDataBaseErrorMessages: TIBDataBaseErrorMessages;
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FPrefix: AnsiString;
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function SQLCodeSupported: boolean;
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protected
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FOwner: TFBClientAPI;
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function GetIBMessage: Ansistring; virtual; abstract;
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function GetSQLMessage: Ansistring;
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public
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constructor Create(aOwner: TFBClientAPI; prefix: AnsiString='');
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constructor Copy(src: TFBStatus);
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function StatusVector: PStatusVector; virtual; abstract;
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function Clone: IStatus; virtual; abstract;
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{IStatus}
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function InErrorState: boolean; virtual; abstract;
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function GetIBErrorCode: TStatusCode;
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function Getsqlcode: TStatusCode;
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function GetMessage: AnsiString;
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function CheckStatusVector(ErrorCodes: array of TFBStatusCode): Boolean;
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function GetIBDataBaseErrorMessages: TIBDataBaseErrorMessages;
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procedure SetIBDataBaseErrorMessages(Value: TIBDataBaseErrorMessages);
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end;
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{ TFBLibrary }
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TFBLibrary = class(TFBInterfacedObject,IFirebirdLibrary)
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private
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class var FEnvSetupDone: boolean;
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class var FLibraryList: array of IFirebirdLibrary;
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private
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FFirebirdAPI: IFirebirdAPI;
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FRequestedLibName: string;
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function LoadIBLibrary: boolean;
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protected
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FFBLibraryName: string;
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FIBLibrary: TLibHandle;
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procedure FreeFBLibrary;
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function GetOverrideLibName: string;
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class procedure SetupEnvironment;
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protected
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function GetFirebird3API: IFirebirdAPI; virtual; abstract;
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function GetLegacyFirebirdAPI: IFirebirdAPI; virtual; abstract;
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public
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constructor Create(aLibPathName: string='');
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destructor Destroy; override;
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class function GetFBLibrary(aLibPathName: string): IFirebirdLibrary;
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class procedure FreeLibraries;
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function SameLibrary(aLibName: string): boolean;
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public
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{IFirebirdLibrary}
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function GetHandle: TLibHandle;
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function GetLibraryName: string;
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function GetLibraryFilePath: string;
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function GetFirebirdAPI: IFirebirdAPI;
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property IBLibrary: TLibHandle read FIBLibrary;
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end;
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{ TFBClientAPI }
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TFBClientAPI = class(TFBInterfacedObject)
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private
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FLocalTimeZoneName: AnsiString; {Informal Time Zone Name from tzname e.g. GMT or BST}
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FTZDataTimeZoneID: AnsiString; {TZData DB ID e.g. Europe/London}
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FLocalTimeOffset: integer;
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FIsDaylightSavingsTime: boolean;
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class var FIBCS: TRTLCriticalSection;
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function FBTimeStampToDateTime(aDate, aTime: longint): TDateTime;
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procedure GetTZDataSettings;
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protected
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FFBLibrary: TFBLibrary;
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function GetProcAddr(ProcName: PAnsiChar): Pointer;
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protected type
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Tfb_shutdown = function (timeout: uint;
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const reason: int): int;
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{$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
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protected
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{FB Shutdown API}
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fb_shutdown: Tfb_shutdown;
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public
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{Taken from legacy API}
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isc_sql_interprete: Tisc_sql_interprete;
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isc_sqlcode: Tisc_sqlcode;
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constructor Create(aFBLibrary: TFBLibrary);
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procedure IBAlloc(var P; OldSize, NewSize: Integer);
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procedure IBDataBaseError;
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function LoadInterface: boolean; virtual;
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procedure FBShutdown; virtual;
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function GetAPI: IFirebirdAPI; virtual; abstract;
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{$IFDEF UNIX}
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function GetFirebirdLibList: string; virtual; abstract;
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{$ENDIF}
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function HasDecFloatSupport: boolean;
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function HasInt128Support: boolean; virtual;
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function HasLocalTZDB: boolean; virtual;
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function HasExtendedTZSupport: boolean; virtual;
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function HasTimeZoneSupport: boolean; virtual;
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public
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property LocalTimeZoneName: AnsiString read FLocalTimeZoneName;
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property TZDataTimeZoneID: AnsiString read FTZDataTimeZoneID;
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property LocalTimeOffset: integer read FLocalTimeOffset;
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public
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{Encode/Decode}
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procedure EncodeInteger(aValue: int64; len: integer; buffer: PByte);
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function DecodeInteger(bufptr: PByte; len: short): int64;
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procedure SQLEncodeDate(aDate: TDateTime; bufptr: PByte); virtual; abstract;
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function SQLDecodeDate(byfptr: PByte): TDateTime; virtual; abstract;
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procedure SQLEncodeTime(aTime: TDateTime; bufptr: PByte); virtual; abstract;
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function SQLDecodeTime(bufptr: PByte): TDateTime; virtual; abstract;
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procedure SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte); virtual; abstract;
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function SQLDecodeDateTime(bufptr: PByte): TDateTime; virtual; abstract;
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function Int128ToStr(bufptr: PByte; scale: integer): AnsiString; virtual;
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procedure StrToInt128(scale: integer; aValue: AnsiString; bufptr: PByte);
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virtual;
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procedure SQLDecFloatEncode(aValue: tBCD; SQLType: cardinal; bufptr: PByte); virtual;
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function SQLDecFloatDecode(SQLType: cardinal; bufptr: PByte): tBCD; virtual;
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240 |
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{IFirebirdAPI}
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function GetStatus: IStatus; virtual; abstract;
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function IsLibraryLoaded: boolean;
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function IsEmbeddedServer: boolean; virtual; abstract;
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function GetFBLibrary: IFirebirdLibrary;
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function GetImplementationVersion: AnsiString;
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function GetClientMajor: integer; virtual; abstract;
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function GetClientMinor: integer; virtual; abstract;
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end;
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IJournallingHook = interface
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['{7d3e45e0-3628-416a-9e22-c20474825031}']
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procedure TransactionStart(Tr: ITransaction);
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function TransactionEnd(TransactionID: integer; Completion: TTrCompletionState): boolean;
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procedure TransactionRetained(Tr: ITransaction; OldTransactionID: integer; Action: TTransactionAction);
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procedure ExecQuery(Stmt: IStatement);
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procedure ExecImmediateJnl(sql: AnsiString; tr: ITransaction);
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end;
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implementation
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261 |
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uses IBUtils, Registry,
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{$IFDEF Unix} unix, initc, dl, {$ENDIF}
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{$IFDEF FPC}
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{$IFDEF WINDOWS }
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WinDirs,
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{$ENDIF}
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{$ELSE}
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ShlObj,
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{$ENDIF}
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SysUtils;
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272 |
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{$IFDEF UNIX}
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{$I 'include/uloadlibrary.inc'}
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{$ELSE}
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{$I 'include/wloadlibrary.inc'}
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{$ENDIF}
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278 |
|
279 |
|
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{ TFBLibrary }
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281 |
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function TFBLibrary.GetOverrideLibName: string;
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begin
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Result := FFBLibraryName;
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if (Result = '') and AllowUseOfFBLIB then
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Result := GetEnvironmentVariable('FBLIB');
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if Result = '' then
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288 |
begin
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289 |
if assigned(OnGetLibraryName) then
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290 |
OnGetLibraryName(Result)
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291 |
end;
|
292 |
end;
|
293 |
|
294 |
procedure TFBLibrary.FreeFBLibrary;
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begin
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296 |
(FFirebirdAPI as TFBClientAPI).FBShutdown;
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if FIBLibrary <> NilHandle then
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FreeLibrary(FIBLibrary);
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FIBLibrary := NilHandle;
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FFBLibraryName := '';
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end;
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302 |
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function TFBLibrary.GetLibraryName: string;
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begin
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Result := ExtractFileName(FFBLibraryName);
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end;
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307 |
|
308 |
function TFBLibrary.GetFirebirdAPI: IFirebirdAPI;
|
309 |
begin
|
310 |
Result := FFirebirdAPI;
|
311 |
end;
|
312 |
|
313 |
constructor TFBLibrary.Create(aLibPathName: string);
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314 |
begin
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315 |
inherited Create;
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316 |
SetupEnvironment;
|
317 |
FFBLibraryName := aLibPathName;
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318 |
FIBLibrary := NilHandle;
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319 |
FFirebirdAPI := GetFirebird3API;
|
320 |
FRequestedLibName := aLibPathName;
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321 |
if aLibPathName <> '' then
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322 |
begin
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323 |
SetLength(FLibraryList,Length(FLibraryList)+1);
|
324 |
FLibraryList[Length(FLibraryList)-1] := self;
|
325 |
end;
|
326 |
if FFirebirdAPI <> nil then
|
327 |
begin
|
328 |
{First try Firebird 3}
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329 |
if not LoadIBLibrary or not (FFirebirdAPI as TFBClientAPI).LoadInterface then
|
330 |
FFirebirdAPI := nil;
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331 |
end;
|
332 |
|
333 |
if FFirebirdAPI = nil then
|
334 |
begin
|
335 |
{now try Firebird 2.5. Under Unix we need to reload the library in case we
|
336 |
are to use the embedded library}
|
337 |
FFirebirdAPI := GetLegacyFirebirdAPI;
|
338 |
if FFirebirdAPI <> nil then
|
339 |
begin
|
340 |
{$IFDEF UNIX}
|
341 |
FreeFBLibrary;
|
342 |
{$ENDIF}
|
343 |
if not LoadIBLibrary or not (FFirebirdAPI as TFBClientAPI).LoadInterface then
|
344 |
FFirebirdAPI := nil;
|
345 |
end;
|
346 |
end;
|
347 |
{Note: FFirebirdAPI will be set to nil if the Firebird API fails to load}
|
348 |
end;
|
349 |
|
350 |
destructor TFBLibrary.Destroy;
|
351 |
begin
|
352 |
FreeFBLibrary;
|
353 |
FFirebirdAPI := nil;
|
354 |
inherited Destroy;
|
355 |
end;
|
356 |
|
357 |
class function TFBLibrary.GetFBLibrary(aLibPathName: string): IFirebirdLibrary;
|
358 |
var i: integer;
|
359 |
begin
|
360 |
Result := nil;
|
361 |
if aLibPathName <> '' then
|
362 |
begin
|
363 |
for i := 0 to Length(FLibraryList) - 1 do
|
364 |
begin
|
365 |
if (FLibraryList[i] as TFBLibrary).SameLibrary(aLibPathName) then
|
366 |
begin
|
367 |
Result := FLibraryList[i];
|
368 |
Exit;
|
369 |
end;
|
370 |
end;
|
371 |
Result := Create(aLibPathName);
|
372 |
end;
|
373 |
|
374 |
end;
|
375 |
|
376 |
class procedure TFBLibrary.FreeLibraries;
|
377 |
var i: integer;
|
378 |
begin
|
379 |
for i := 0 to Length(FLibraryList) - 1 do
|
380 |
FLibraryList[i] := nil;
|
381 |
SetLength(FLibraryList,0);
|
382 |
end;
|
383 |
|
384 |
function TFBLibrary.SameLibrary(aLibName: string): boolean;
|
385 |
begin
|
386 |
Result := FRequestedLibName = aLibName;
|
387 |
end;
|
388 |
|
389 |
function TFBLibrary.GetHandle: TLibHandle;
|
390 |
begin
|
391 |
Result := FIBLibrary;
|
392 |
end;
|
393 |
|
394 |
{ TFBClientAPI }
|
395 |
|
396 |
constructor TFBClientAPI.Create(aFBLibrary: TFBLibrary);
|
397 |
begin
|
398 |
inherited Create;
|
399 |
FFBLibrary := aFBLibrary;
|
400 |
GetTZDataSettings;
|
401 |
end;
|
402 |
|
403 |
procedure TFBClientAPI.IBAlloc(var P; OldSize, NewSize: Integer);
|
404 |
var
|
405 |
i: Integer;
|
406 |
begin
|
407 |
ReallocMem(Pointer(P), NewSize);
|
408 |
for i := OldSize to NewSize - 1 do PAnsiChar(P)[i] := #0;
|
409 |
end;
|
410 |
|
411 |
procedure TFBClientAPI.IBDataBaseError;
|
412 |
begin
|
413 |
raise EIBInterBaseError.Create(GetStatus);
|
414 |
end;
|
415 |
|
416 |
procedure TFBClientAPI.EncodeInteger(aValue: int64; len: integer; buffer: PByte);
|
417 |
begin
|
418 |
while len > 0 do
|
419 |
begin
|
420 |
buffer^ := aValue and $FF;
|
421 |
Inc(buffer);
|
422 |
Dec(len);
|
423 |
aValue := aValue shr 8;
|
424 |
end;
|
425 |
end;
|
426 |
|
427 |
(*
|
428 |
DecodeInteger is Translated from
|
429 |
|
430 |
SINT64 API_ROUTINE isc_portable_integer(const UCHAR* ptr, SSHORT length)
|
431 |
if (!ptr || length <= 0 || length > 8)
|
432 |
return 0;
|
433 |
|
434 |
SINT64 value = 0;
|
435 |
int shift = 0;
|
436 |
|
437 |
while (--length > 0)
|
438 |
{
|
439 |
value += ((SINT64) *ptr++) << shift;
|
440 |
shift += 8;
|
441 |
}
|
442 |
|
443 |
value += ((SINT64)(SCHAR) *ptr) << shift;
|
444 |
|
445 |
return value;
|
446 |
*)
|
447 |
|
448 |
function TFBClientAPI.DecodeInteger(bufptr: PByte; len: short): int64;
|
449 |
var shift: integer;
|
450 |
begin
|
451 |
Result := 0;
|
452 |
if (BufPtr = nil) or (len <= 0) or (len > 8) then
|
453 |
Exit;
|
454 |
|
455 |
shift := 0;
|
456 |
dec(len);
|
457 |
while len > 0 do
|
458 |
begin
|
459 |
Result := Result + (int64(bufptr^) shl shift);
|
460 |
Inc(bufptr);
|
461 |
shift := shift + 8;
|
462 |
dec(len);
|
463 |
end;
|
464 |
Result := Result + (int64(bufptr^) shl shift);
|
465 |
end;
|
466 |
|
467 |
function TFBClientAPI.Int128ToStr(bufptr: PByte; scale: integer): AnsiString;
|
468 |
begin
|
469 |
if not HasInt128Support then
|
470 |
IBError(ibxeNotSupported,[]);
|
471 |
end;
|
472 |
|
473 |
procedure TFBClientAPI.StrToInt128(scale: integer; aValue: AnsiString; bufptr: PByte);
|
474 |
begin
|
475 |
if not HasInt128Support then
|
476 |
IBError(ibxeNotSupported,[]);
|
477 |
end;
|
478 |
|
479 |
procedure TFBClientAPI.SQLDecFloatEncode(aValue: tBCD; SQLType: cardinal;
|
480 |
bufptr: PByte);
|
481 |
begin
|
482 |
if not HasDecFloatSupport then
|
483 |
IBError(ibxeNotSupported,[]);
|
484 |
end;
|
485 |
|
486 |
function TFBClientAPI.SQLDecFloatDecode(SQLType: cardinal; bufptr: PByte): tBCD;
|
487 |
begin
|
488 |
if not HasDecFloatSupport then
|
489 |
IBError(ibxeNotSupported,[]);
|
490 |
end;
|
491 |
|
492 |
function TFBClientAPI.IsLibraryLoaded: boolean;
|
493 |
begin
|
494 |
Result := FFBLibrary.IBLibrary <> NilHandle;
|
495 |
end;
|
496 |
|
497 |
function TFBClientAPI.GetFBLibrary: IFirebirdLibrary;
|
498 |
begin
|
499 |
Result := FFBLibrary;
|
500 |
end;
|
501 |
|
502 |
function TFBClientAPI.FBTimeStampToDateTime(aDate, aTime: longint): TDateTime;
|
503 |
begin
|
504 |
{aDate/aTime are in TTimestamp format but aTime is decimilliseconds}
|
505 |
aDate := aDate - DateDelta;
|
506 |
if aDate < 0 then
|
507 |
Result := trunc(aDate) - abs(frac(aTime / (MSecsPerDay*10)))
|
508 |
else
|
509 |
Result := trunc(aDate) + abs(frac(aTime / (MSecsPerDay*10)));
|
510 |
end;
|
511 |
|
512 |
{$IFDEF UNIX}
|
513 |
|
514 |
procedure TFBClientAPI.GetTZDataSettings;
|
515 |
var S: TStringList;
|
516 |
begin
|
517 |
FLocalTimeOffset := GetLocalTimeOffset;
|
518 |
{$if declared(Gettzname)}
|
519 |
FLocalTimeZoneName := Gettzname(tzdaylight);
|
520 |
{$else}
|
521 |
FLocalTimeZoneName := tzname[tzdaylight];
|
522 |
{$ifend}
|
523 |
FIsDaylightSavingsTime := tzdaylight;
|
524 |
if FileExists(DefaultTimeZoneFile) then
|
525 |
begin
|
526 |
S := TStringList.Create;
|
527 |
try
|
528 |
S.LoadFromFile(DefaultTimeZoneFile);
|
529 |
if S.Count > 0 then
|
530 |
FTZDataTimeZoneID := S[0];
|
531 |
finally
|
532 |
S.Free;
|
533 |
end;
|
534 |
end;
|
535 |
end;
|
536 |
{$ENDIF}
|
537 |
|
538 |
{$IFDEF WINDOWS}
|
539 |
procedure TFBClientAPI.GetTZDataSettings;
|
540 |
var TZInfo: TTimeZoneInformation;
|
541 |
begin
|
542 |
FIsDaylightSavingsTime := false;
|
543 |
{is there any way of working out the default TZData DB time zone ID under Windows?}
|
544 |
case GetTimeZoneInformation(TZInfo) of
|
545 |
TIME_ZONE_ID_UNKNOWN:
|
546 |
begin
|
547 |
FLocalTimeZoneName := '';
|
548 |
FLocalTimeOffset := 0;
|
549 |
end;
|
550 |
TIME_ZONE_ID_STANDARD:
|
551 |
begin
|
552 |
FLocalTimeZoneName := strpas(PWideChar(@TZInfo.StandardName));
|
553 |
FLocalTimeOffset := TZInfo.Bias;
|
554 |
end;
|
555 |
TIME_ZONE_ID_DAYLIGHT:
|
556 |
begin
|
557 |
FLocalTimeZoneName := strpas(PWideChar(@TZInfo.DaylightName));
|
558 |
FLocalTimeOffset := TZInfo.DayLightBias;
|
559 |
FIsDaylightSavingsTime := true;
|
560 |
end;
|
561 |
end;
|
562 |
end;
|
563 |
{$ENDIF}
|
564 |
|
565 |
function TFBClientAPI.GetProcAddr(ProcName: PAnsiChar): Pointer;
|
566 |
begin
|
567 |
Result := nil;
|
568 |
if assigned(FFBLibrary) and (FFBLibrary.IBLibrary <> NilHandle) then
|
569 |
Result := GetProcAddress(FFBLibrary.IBLibrary, ProcName);
|
570 |
if not Assigned(Result) then
|
571 |
raise Exception.CreateFmt(SFirebirdAPIFuncNotFound,[ProcName]);
|
572 |
end;
|
573 |
|
574 |
function TFBClientAPI.HasDecFloatSupport: boolean;
|
575 |
begin
|
576 |
Result := GetClientMajor >= 4;
|
577 |
end;
|
578 |
|
579 |
function TFBClientAPI.HasInt128Support: boolean;
|
580 |
begin
|
581 |
Result := false;
|
582 |
end;
|
583 |
|
584 |
function TFBClientAPI.HasLocalTZDB: boolean;
|
585 |
begin
|
586 |
Result := false;
|
587 |
end;
|
588 |
|
589 |
function TFBClientAPI.HasExtendedTZSupport: boolean;
|
590 |
begin
|
591 |
Result := false;
|
592 |
end;
|
593 |
|
594 |
function TFBClientAPI.HasTimeZoneSupport: boolean;
|
595 |
begin
|
596 |
Result := false;
|
597 |
end;
|
598 |
|
599 |
function TFBClientAPI.GetImplementationVersion: AnsiString;
|
600 |
begin
|
601 |
Result := Format('%d.%d',[GetClientMajor,GetClientMinor]);
|
602 |
end;
|
603 |
|
604 |
function TFBClientAPI.LoadInterface: boolean;
|
605 |
begin
|
606 |
isc_sqlcode := GetProcAddr('isc_sqlcode'); {do not localize}
|
607 |
isc_sql_interprete := GetProcAddr('isc_sql_interprete'); {do not localize}
|
608 |
fb_shutdown := GetProcAddr('fb_shutdown'); {do not localize}
|
609 |
Result := true; {don't case if these fail to load}
|
610 |
end;
|
611 |
|
612 |
procedure TFBClientAPI.FBShutdown;
|
613 |
begin
|
614 |
if assigned(fb_shutdown) then
|
615 |
fb_shutdown(0,fb_shutrsn_exit_called);
|
616 |
end;
|
617 |
|
618 |
{ TFBStatus }
|
619 |
|
620 |
function TFBStatus.SQLCodeSupported: boolean;
|
621 |
begin
|
622 |
Result:= (FOwner <> nil) and assigned(FOwner.isc_sqlcode) and assigned(FOwner.isc_sql_interprete);
|
623 |
end;
|
624 |
|
625 |
function TFBStatus.GetSQLMessage: Ansistring;
|
626 |
var local_buffer: array[0..IBHugeLocalBufferLength - 1] of AnsiChar;
|
627 |
begin
|
628 |
Result := '';
|
629 |
if (FOwner <> nil) and assigned(FOwner.isc_sql_interprete) then
|
630 |
begin
|
631 |
FOwner.isc_sql_interprete(Getsqlcode, local_buffer, sizeof(local_buffer));
|
632 |
Result := strpas(local_buffer);
|
633 |
end;
|
634 |
end;
|
635 |
|
636 |
constructor TFBStatus.Create(aOwner: TFBClientAPI; prefix: AnsiString);
|
637 |
begin
|
638 |
inherited Create;
|
639 |
FOwner := aOwner;
|
640 |
FPrefix := prefix;
|
641 |
FIBDataBaseErrorMessages := [ShowIBMessage];
|
642 |
end;
|
643 |
|
644 |
constructor TFBStatus.Copy(src: TFBStatus);
|
645 |
begin
|
646 |
inherited Create;
|
647 |
FOwner := src.FOwner;
|
648 |
FPrefix := src.FPrefix;
|
649 |
SetIBDataBaseErrorMessages(src.GetIBDataBaseErrorMessages);
|
650 |
end;
|
651 |
|
652 |
function TFBStatus.GetIBErrorCode: TStatusCode;
|
653 |
begin
|
654 |
Result := StatusVector^[1];
|
655 |
end;
|
656 |
|
657 |
function TFBStatus.Getsqlcode: TStatusCode;
|
658 |
begin
|
659 |
if (FOwner <> nil) and assigned(FOwner.isc_sqlcode) then
|
660 |
Result := FOwner.isc_sqlcode(PISC_STATUS(StatusVector))
|
661 |
else
|
662 |
Result := -999; {generic SQL Code}
|
663 |
end;
|
664 |
|
665 |
function TFBStatus.GetMessage: AnsiString;
|
666 |
var IBDataBaseErrorMessages: TIBDataBaseErrorMessages;
|
667 |
begin
|
668 |
Result := FPrefix;
|
669 |
IBDataBaseErrorMessages := FIBDataBaseErrorMessages;
|
670 |
if SQLCodeSupported then
|
671 |
begin
|
672 |
if (ShowSQLCode in IBDataBaseErrorMessages) then
|
673 |
Result := Result + 'SQLCODE: ' + IntToStr(Getsqlcode); {do not localize}
|
674 |
|
675 |
if (ShowSQLMessage in IBDataBaseErrorMessages) then
|
676 |
begin
|
677 |
if ShowSQLCode in IBDataBaseErrorMessages then
|
678 |
Result := Result + LineEnding;
|
679 |
Result := Result + GetSQLMessage;
|
680 |
end;
|
681 |
end;
|
682 |
|
683 |
if (ShowIBMessage in IBDataBaseErrorMessages) then
|
684 |
begin
|
685 |
if Result <> FPrefix then
|
686 |
Result := Result + LineEnding;
|
687 |
Result := Result + 'Engine Code: ' + IntToStr(GetIBErrorCode) + LineEnding + GetIBMessage;
|
688 |
end;
|
689 |
if (Result <> '') and (Result[Length(Result)] = '.') then
|
690 |
Delete(Result, Length(Result), 1);
|
691 |
end;
|
692 |
|
693 |
function TFBStatus.CheckStatusVector(ErrorCodes: array of TFBStatusCode
|
694 |
): Boolean;
|
695 |
var
|
696 |
p: PISC_STATUS;
|
697 |
i: Integer;
|
698 |
procedure NextP(i: Integer);
|
699 |
begin
|
700 |
p := PISC_STATUS(PAnsiChar(p) + (i * SizeOf(ISC_STATUS)));
|
701 |
end;
|
702 |
begin
|
703 |
p := PISC_STATUS(StatusVector);
|
704 |
result := False;
|
705 |
while (p^ <> 0) and (not result) do
|
706 |
case p^ of
|
707 |
3: NextP(3);
|
708 |
1, 4:
|
709 |
begin
|
710 |
NextP(1);
|
711 |
i := 0;
|
712 |
while (i <= High(ErrorCodes)) and (not result) do
|
713 |
begin
|
714 |
result := p^ = ErrorCodes[i];
|
715 |
Inc(i);
|
716 |
end;
|
717 |
NextP(1);
|
718 |
end;
|
719 |
else
|
720 |
NextP(2);
|
721 |
end;
|
722 |
end;
|
723 |
|
724 |
function TFBStatus.GetIBDataBaseErrorMessages: TIBDataBaseErrorMessages;
|
725 |
begin
|
726 |
EnterCriticalSection(TFBClientAPI.FIBCS);
|
727 |
try
|
728 |
result := FIBDataBaseErrorMessages;
|
729 |
finally
|
730 |
LeaveCriticalSection(TFBClientAPI.FIBCS);
|
731 |
end;
|
732 |
end;
|
733 |
|
734 |
procedure TFBStatus.SetIBDataBaseErrorMessages(Value: TIBDataBaseErrorMessages);
|
735 |
begin
|
736 |
EnterCriticalSection(TFBClientAPI.FIBCS);
|
737 |
try
|
738 |
FIBDataBaseErrorMessages := Value;
|
739 |
finally
|
740 |
LeaveCriticalSection(TFBClientAPI.FIBCS);
|
741 |
end;
|
742 |
end;
|
743 |
|
744 |
initialization
|
745 |
TFBLibrary.FEnvSetupDone := false;
|
746 |
{$IFNDEF FPC}
|
747 |
InitializeCriticalSection(TFBClientAPI.FIBCS);
|
748 |
{$ELSE}
|
749 |
InitCriticalSection(TFBClientAPI.FIBCS);
|
750 |
{$ENDIF}
|
751 |
|
752 |
finalization
|
753 |
TFBLibrary.FreeLibraries;
|
754 |
{$IFNDEF FPC}
|
755 |
DeleteCriticalSection(TFBClientAPI.FIBCS);
|
756 |
{$ELSE}
|
757 |
DoneCriticalSection(TFBClientAPI.FIBCS);
|
758 |
{$ENDIF}
|
759 |
end.
|
760 |
|