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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.
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*
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* The contents of this file are subject to the Initial Developer's
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* Public License Version 1.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy
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* 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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unit FB30ClientAPI;
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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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{$mode delphi}
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{$interfaces COM}
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{$ENDIF}
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interface
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uses
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Classes, SysUtils, FBClientAPI, Firebird, IB, IBExternals, FmtBCD, FBClientLib,
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FBActivityMonitor;
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type
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{ TFB30Status }
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TFB30Status = class(TFBStatus,IStatus)
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protected
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FStatus: Firebird.IStatus;
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FDirty: boolean;
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public
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destructor Destroy; override;
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procedure Init;
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procedure FreeHandle;
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function InErrorState: boolean;
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function Warning: boolean;
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function GetStatus: Firebird.IStatus;
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function StatusVector: PStatusVector; override;
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property Dirty: boolean read FDirty;
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end;
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{ TFB30StatusObject }
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TFB30StatusObject = class(TFB30Status)
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public
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constructor Create(aOwner: TFBClientAPI; status: Firebird.IStatus; prefix: Ansistring='');
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end;
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Tfb_get_master_interface = function: IMaster;
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{$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
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{ TFB30ClientAPI }
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TFB30ClientAPI = class(TFBClientAPI,IFirebirdAPI,IFBIMasterProvider)
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private
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FMaster: Firebird.IMaster;
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FUtil: Firebird.IUtil;
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FProvider: Firebird.IProvider;
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FConfigManager: Firebird.IConfigManager;
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FStatus: TFB30Status;
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FIsEmbeddedServer: boolean;
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FStatusIntf: IStatus; {Keep a reference to the interface - automatic destroy
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when this class is freed and last reference to IStatus
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goes out of scope.}
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procedure CheckPlugins;
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public
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constructor Create(aFBLibrary: TFBLibrary);
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destructor Destroy; override;
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function StatusIntf: Firebird.IStatus;
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procedure Check4DataBaseError; overload;
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procedure Check4DataBaseError(st: Firebird.IStatus); overload;
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function InErrorState: boolean;
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function LoadInterface: boolean; override;
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procedure FBShutdown; override;
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function GetAPI: IFirebirdAPI; override;
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function Firebird4orLater: boolean;
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{$IFDEF UNIX}
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function GetFirebirdLibList: string; override;
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{$ENDIF}
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public
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{IFirebirdAPI}
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function GetStatus: IStatus; override;
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function AllocateDPB: IDPB;
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function AllocateTPB: ITPB;
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{Database connections}
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function OpenDatabase(DatabaseName: AnsiString; DPB: IDPB; RaiseExceptionOnConnectError: boolean=true): IAttachment;
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function CreateDatabase(DatabaseName: AnsiString; DPB: IDPB; RaiseExceptionOnError: boolean=true): IAttachment; overload;
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function CreateDatabase(sql: AnsiString; aSQLDialect: integer; RaiseExceptionOnError: boolean=true): IAttachment; overload;
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{Start Transaction against multiple databases}
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function StartTransaction(Attachments: array of IAttachment;
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TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; overload;
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function StartTransaction(Attachments: array of IAttachment;
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TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; overload;
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{Service Manager}
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function AllocateSPB: ISPB;
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function GetServiceManager(ServerName: AnsiString; Protocol: TProtocol; SPB: ISPB): IServiceManager; overload;
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function GetServiceManager(ServerName: AnsiString; Port: Ansistring; Protocol: TProtocol; SPB: ISPB): IServiceManager; overload;
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{Information}
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function HasServiceAPI: boolean;
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function HasRollbackRetaining: boolean;
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function IsEmbeddedServer: boolean; override;
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function GetClientMajor: integer; override;
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function GetClientMinor: integer; override;
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function HasLocalTZDB: boolean; override;
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function HasTimeZoneSupport: boolean; override;
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function HasExtendedTZSupport: boolean; override;
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function HasInt128Support: boolean; override;
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{Firebird 3 API}
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function HasMasterIntf: boolean;
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function GetIMaster: TObject;
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{IFBIMasterProvider}
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function GetIMasterIntf: Firebird.IMaster;
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{Encode/Decode}
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procedure SQLEncodeDate(aDate: TDateTime; bufptr: PByte); override;
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function SQLDecodeDate(bufptr: PByte): TDateTime; override;
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procedure SQLEncodeTime(aTime: TDateTime; bufptr: PByte); override;
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function SQLDecodeTime(bufptr: PByte): TDateTime; override;
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procedure SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte); override;
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function SQLDecodeDateTime(bufptr: PByte): TDateTime; override;
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function FormatStatus(Status: TFBStatus): AnsiString; override;
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function FormatFBStatus(Status: Firebird.IStatus): AnsiString;
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{Firebird 4 Extensions}
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procedure SQLDecFloatEncode(aValue: tBCD; SQLType: cardinal; bufptr: PByte);
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override;
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function SQLDecFloatDecode(SQLType: cardinal; bufptr: PByte): tBCD; override;
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function Int128ToStr(bufptr: PByte; scale: integer): AnsiString; override;
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procedure StrToInt128(scale: integer; aValue: AnsiString; bufptr: PByte); override;
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{Firebird Interfaces}
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property MasterIntf: Firebird.IMaster read FMaster;
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property UtilIntf: Firebird.IUtil read FUtil;
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property ProviderIntf: Firebird.IProvider read FProvider;
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end;
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{ TXPBParameterBlock }
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TXPBParameterBlock = class(TFBInterfacedObject)
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private
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FBuilder: Firebird.IXpbBuilder;
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FFirebird30ClientAPI: TFB30ClientAPI;
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public
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constructor Create(api: TFB30ClientAPI; kind: cardinal);
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destructor Destroy; override;
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function getBuffer: PByte;
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function getDataLength: cardinal;
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procedure insertInt(tag: Byte; value: Integer);
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property Builder: Firebird.IXpbBuilder read FBuilder;
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public
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procedure PrintBuf;
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end;
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implementation
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uses FB30Attachment, {$IFDEF FPC}dynlibs{$ELSE} windows{$ENDIF},
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FBMessages, FB30Services, FB30Transaction, IBUtils, DateUtils,
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FBAttachment, FBTransaction, FBServices;
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type
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PISC_DATE = ^ISC_DATE;
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PISC_TIME = ^ISC_TIME;
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{ TXPBParameterBlock }
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constructor TXPBParameterBlock.Create(api: TFB30ClientAPI; kind: cardinal);
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begin
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inherited Create;
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FFirebird30ClientAPI := api;
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with FFirebird30ClientAPI do
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begin
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FBuilder := UtilIntf.getXpbBuilder(StatusIntf,kind,nil,0);
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Check4DataBaseError;
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end;
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end;
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destructor TXPBParameterBlock.Destroy;
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begin
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if FBuilder <> nil then
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begin
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FBuilder.dispose;
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FBuilder := nil;
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end;
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inherited Destroy;
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end;
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function TXPBParameterBlock.getBuffer: PByte;
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begin
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with FFirebird30ClientAPI do
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begin
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Result := PByte(FBuilder.getBuffer(StatusIntf));
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Check4DataBaseError;
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end;
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end;
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function TXPBParameterBlock.getDataLength: cardinal;
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begin
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with FFirebird30ClientAPI do
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begin
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Result := FBuilder.getBufferLength(StatusIntf);
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Check4DataBaseError;
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end;
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end;
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procedure TXPBParameterBlock.insertInt(tag: Byte; value: Integer);
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begin
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with FFirebird30ClientAPI do
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begin
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Builder.insertInt(StatusIntf,tag,value);
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Check4DataBaseError;
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end;
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end;
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procedure TXPBParameterBlock.PrintBuf;
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var i: integer;
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buffer: PByte;
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begin
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write(ClassName,': (',getDataLength,') ');
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buffer := getBuffer;
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for i := 0 to getDataLength - 1 do
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begin
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write(Format('%x ',[buffer^]));
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Inc(buffer);
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end;
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writeln
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end;
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{ TFB30StatusObject }
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constructor TFB30StatusObject.Create(aOwner: TFBClientAPI;
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status: Firebird.IStatus; prefix: Ansistring);
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begin
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inherited Create(aOwner,prefix);
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FStatus := status;
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end;
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{ TFB30Status }
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destructor TFB30Status.Destroy;
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begin
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FreeHandle;
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inherited Destroy;
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end;
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procedure TFB30Status.Init;
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begin
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if assigned(FStatus) and Dirty then
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begin
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FStatus.Init;
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FDirty := false;
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end;
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end;
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procedure TFB30Status.FreeHandle;
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begin
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if FStatus <> nil then
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begin
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FStatus.dispose;
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FStatus := nil;
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end;
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end;
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function TFB30Status.InErrorState: boolean;
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begin
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with GetStatus do
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Result := ((getState and STATE_ERRORS) <> 0);
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if Result then
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FDirty := true;
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end;
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function TFB30Status.Warning: boolean;
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begin
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with GetStatus do
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Result := ((getState and STATE_WARNINGS) <> 0);
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if Result then
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FDirty := true;
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end;
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function TFB30Status.GetStatus: Firebird.IStatus;
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begin
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if FStatus = nil then
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with FOwner do
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FStatus := (FOwner as TFB30ClientAPI).MasterIntf.GetStatus;
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Result := FStatus;
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end;
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function TFB30Status.StatusVector: PStatusVector;
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begin
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Result := PStatusVector(GetStatus.getErrors);
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end;
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{ TFB30ClientAPI }
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procedure TFB30ClientAPI.CheckPlugins;
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var FBConf: Firebird.IFirebirdConf;
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Plugins: AnsiString;
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PluginsList: TStringList;
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begin
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FIsEmbeddedServer := false;
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FBConf := FConfigManager.getFirebirdConf;
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try
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Plugins := FBConf.asString(FBConf.getKey('Providers'));
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finally
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FBConf.release;
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end;
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if Plugins = '' then Exit;
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PluginsList := TStringList.Create;
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try
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PluginsList.CommaText := Plugins;
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FIsEmbeddedServer := (PluginsList.IndexOf('Engine12') <> -1) or {Firebird 3}
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(PluginsList.IndexOf('Engine13') <> -1); {Firebird 4}
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finally
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PluginsList.Free;
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end;
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end;
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function TFB30ClientAPI.Firebird4orLater: boolean;
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begin
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Result := (GetClientMajor > 4) or (
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(GetClientMajor = 4) and (UtilIntf.vtable.version >= 4)
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and (UtilIntf.vtable.version <> 21) {ignore FB4 Beta1}
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and (UtilIntf.vtable.version <> 24)) {ignore FB4 Beta2}
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end;
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{$IFDEF UNIX}
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function TFB30ClientAPI.GetFirebirdLibList: string;
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begin
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Result := 'libfbclient.so:libfbclient.so.2';
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end;
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{$ENDIF}
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function TFB30ClientAPI.LoadInterface: boolean;
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var
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fb_get_master_interface: Tfb_get_master_interface;
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begin
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Result := inherited LoadInterface;
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fb_get_master_interface := GetProcAddress(GetFBLibrary.GetHandle, 'fb_get_master_interface'); {do not localize}
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if assigned(fb_get_master_interface) then
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begin
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FMaster := fb_get_master_interface;
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FUtil := FMaster.getUtilInterface;
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FProvider := FMaster.getDispatcher;
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FConfigManager := FMaster.getConfigManager;
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CheckPlugins;
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end;
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Result := Result and HasMasterIntf;
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end;
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procedure TFB30ClientAPI.FBShutdown;
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begin
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if assigned(fb_shutdown) then
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begin
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FStatus.FreeHandle;
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if assigned(FProvider) then
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begin
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FProvider.release;
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FProvider := nil;
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end;
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end;
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inherited;
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end;
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function TFB30ClientAPI.GetAPI: IFirebirdAPI;
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begin
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Result := self;
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end;
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396 |
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constructor TFB30ClientAPI.Create(aFBLibrary: TFBLibrary);
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begin
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inherited Create(aFBLibrary);
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FStatus := TFB30Status.Create(self);
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FStatusIntf := FStatus;
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end;
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403 |
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destructor TFB30ClientAPI.Destroy;
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begin
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FStatus.FreeHandle;
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if assigned(FProvider) then
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FProvider.release;
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409 |
inherited Destroy;
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end;
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411 |
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function TFB30ClientAPI.StatusIntf: Firebird.IStatus;
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begin
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Result := FStatus.GetStatus;
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Result.Init;
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end;
|
417 |
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418 |
procedure TFB30ClientAPI.Check4DataBaseError;
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419 |
begin
|
420 |
if FStatus.InErrorState then
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421 |
IBDataBaseError;
|
422 |
end;
|
423 |
|
424 |
procedure TFB30ClientAPI.Check4DataBaseError(st: Firebird.IStatus);
|
425 |
begin
|
426 |
if ((st.getState and st.STATE_ERRORS) <> 0) then
|
427 |
raise EIBInterBaseError.Create(TFB30StatusObject.Create(self,st));
|
428 |
end;
|
429 |
|
430 |
function TFB30ClientAPI.InErrorState: boolean;
|
431 |
begin
|
432 |
Result := FStatus.InErrorState;
|
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end;
|
434 |
|
435 |
function TFB30ClientAPI.GetStatus: IStatus;
|
436 |
begin
|
437 |
Result := FStatusIntf;
|
438 |
end;
|
439 |
|
440 |
function TFB30ClientAPI.AllocateDPB: IDPB;
|
441 |
begin
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442 |
Result := TDPB.Create(self);
|
443 |
end;
|
444 |
|
445 |
function TFB30ClientAPI.AllocateTPB: ITPB;
|
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begin
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447 |
Result := TTPB.Create(self);
|
448 |
end;
|
449 |
|
450 |
function TFB30ClientAPI.OpenDatabase(DatabaseName: AnsiString; DPB: IDPB;
|
451 |
RaiseExceptionOnConnectError: boolean): IAttachment;
|
452 |
begin
|
453 |
Result := TFB30Attachment.Create(self,DatabaseName, DPB, RaiseExceptionOnConnectError);
|
454 |
if not Result.IsConnected then
|
455 |
Result := nil;
|
456 |
end;
|
457 |
|
458 |
function TFB30ClientAPI.CreateDatabase(DatabaseName: AnsiString; DPB: IDPB;
|
459 |
RaiseExceptionOnError: boolean): IAttachment;
|
460 |
begin
|
461 |
Result := TFB30Attachment.CreateDatabase(self,DatabaseName,DPB, RaiseExceptionOnError);
|
462 |
if not Result.IsConnected then
|
463 |
Result := nil;
|
464 |
end;
|
465 |
|
466 |
function TFB30ClientAPI.CreateDatabase(sql: AnsiString; aSQLDialect: integer;
|
467 |
RaiseExceptionOnError: boolean): IAttachment;
|
468 |
begin
|
469 |
Result := TFB30Attachment.CreateDatabase(self,sql,aSQLDialect, RaiseExceptionOnError);
|
470 |
if not Result.IsConnected then
|
471 |
Result := nil;
|
472 |
end;
|
473 |
|
474 |
function TFB30ClientAPI.StartTransaction(Attachments: array of IAttachment;
|
475 |
TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction;
|
476 |
begin
|
477 |
Result := TFB30Transaction.Create(self,Attachments,TPB,DefaultCompletion);
|
478 |
end;
|
479 |
|
480 |
function TFB30ClientAPI.StartTransaction(Attachments: array of IAttachment;
|
481 |
TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction;
|
482 |
begin
|
483 |
Result := TFB30Transaction.Create(self,Attachments,TPB,DefaultCompletion);
|
484 |
end;
|
485 |
|
486 |
function TFB30ClientAPI.AllocateSPB: ISPB;
|
487 |
begin
|
488 |
Result := TSPB.Create(self);
|
489 |
end;
|
490 |
|
491 |
function TFB30ClientAPI.GetServiceManager(ServerName: AnsiString;
|
492 |
Protocol: TProtocol; SPB: ISPB): IServiceManager;
|
493 |
begin
|
494 |
Result := TFB30ServiceManager.Create(self,ServerName,Protocol,SPB);
|
495 |
end;
|
496 |
|
497 |
function TFB30ClientAPI.GetServiceManager(ServerName: AnsiString;
|
498 |
Port: Ansistring; Protocol: TProtocol; SPB: ISPB): IServiceManager;
|
499 |
begin
|
500 |
Result := TFB30ServiceManager.Create(self,ServerName,Protocol,SPB,Port);
|
501 |
end;
|
502 |
|
503 |
function TFB30ClientAPI.HasServiceAPI: boolean;
|
504 |
begin
|
505 |
Result := true;
|
506 |
end;
|
507 |
|
508 |
function TFB30ClientAPI.HasMasterIntf: boolean;
|
509 |
begin
|
510 |
Result := MasterIntf <> nil;
|
511 |
end;
|
512 |
|
513 |
function TFB30ClientAPI.GetIMaster: TObject;
|
514 |
begin
|
515 |
Result := FMaster;
|
516 |
end;
|
517 |
|
518 |
function TFB30ClientAPI.GetIMasterIntf: Firebird.IMaster;
|
519 |
begin
|
520 |
Result := FMaster;
|
521 |
end;
|
522 |
|
523 |
function TFB30ClientAPI.HasRollbackRetaining: boolean;
|
524 |
begin
|
525 |
Result := true;
|
526 |
end;
|
527 |
|
528 |
function TFB30ClientAPI.IsEmbeddedServer: boolean;
|
529 |
begin
|
530 |
Result := FIsEmbeddedServer;
|
531 |
end;
|
532 |
|
533 |
function TFB30ClientAPI.GetClientMajor: integer;
|
534 |
begin
|
535 |
Result := UtilIntf.GetClientVersion div 256;
|
536 |
end;
|
537 |
|
538 |
function TFB30ClientAPI.GetClientMinor: integer;
|
539 |
begin
|
540 |
Result := UtilIntf.GetClientVersion mod 256;
|
541 |
end;
|
542 |
|
543 |
procedure TFB30ClientAPI.SQLEncodeDate(aDate: TDateTime; bufptr: PByte);
|
544 |
var
|
545 |
Yr, Mn, Dy: Word;
|
546 |
begin
|
547 |
DecodeDate(aDate, Yr, Mn, Dy);
|
548 |
PISC_Date(Bufptr)^ := UtilIntf.encodeDate(Yr, Mn, Dy);
|
549 |
end;
|
550 |
|
551 |
function TFB30ClientAPI.SQLDecodeDate(bufptr: PByte): TDateTime;
|
552 |
var
|
553 |
Yr, Mn, Dy: cardinal;
|
554 |
begin
|
555 |
UtilIntf.decodeDate(PISC_DATE(bufptr)^,@Yr, @Mn, @Dy);
|
556 |
try
|
557 |
result := EncodeDate(Yr, Mn,Dy);
|
558 |
except
|
559 |
on E: EConvertError do begin
|
560 |
IBError(ibxeInvalidDataConversion, [nil]);
|
561 |
end;
|
562 |
end;
|
563 |
end;
|
564 |
|
565 |
procedure TFB30ClientAPI.SQLEncodeTime(aTime: TDateTime; bufptr: PByte);
|
566 |
var
|
567 |
Hr, Mt, S: word;
|
568 |
DMs: cardinal;
|
569 |
begin
|
570 |
FBDecodeTime(aTime,Hr, Mt, S, DMs);
|
571 |
PISC_TIME(bufptr)^ := UtilIntf.encodeTime(Hr, Mt, S, DMs);
|
572 |
end;
|
573 |
|
574 |
function TFB30ClientAPI.SQLDecodeTime(bufptr: PByte): TDateTime;
|
575 |
var
|
576 |
Hr, Mt, S, DMs: cardinal;
|
577 |
begin
|
578 |
UtilIntf.decodeTime(PISC_TIME(bufptr)^,@Hr, @Mt, @S, @DMs);
|
579 |
try
|
580 |
Result := FBEncodeTime(Hr, Mt, S, DMs);
|
581 |
except
|
582 |
on E: EConvertError do begin
|
583 |
IBError(ibxeInvalidDataConversion, [nil]);
|
584 |
end;
|
585 |
end;
|
586 |
end;
|
587 |
|
588 |
procedure TFB30ClientAPI.SQLEncodeDateTime(aDateTime: TDateTime; bufptr: PByte);
|
589 |
begin
|
590 |
SQLEncodeDate(aDateTime,bufPtr);
|
591 |
Inc(bufptr,sizeof(ISC_DATE));
|
592 |
SQLEncodeTime(aDateTime,bufPtr);
|
593 |
end;
|
594 |
|
595 |
function TFB30ClientAPI.SQLDecodeDateTime(bufptr: PByte): TDateTime;
|
596 |
begin
|
597 |
Result := SQLDecodeDate(bufPtr);
|
598 |
Inc(bufptr,sizeof(ISC_DATE));
|
599 |
Result := Result + SQLDecodeTime(bufPtr);
|
600 |
end;
|
601 |
|
602 |
function TFB30ClientAPI.FormatStatus(Status: TFBStatus): AnsiString;
|
603 |
begin
|
604 |
Result := FormatFBStatus((Status as TFB30Status).GetStatus);
|
605 |
end;
|
606 |
|
607 |
function TFB30ClientAPI.FormatFBStatus(Status: Firebird.IStatus): AnsiString;
|
608 |
var local_buffer: array[0..IBHugeLocalBufferLength - 1] of AnsiChar;
|
609 |
begin
|
610 |
Result := '';
|
611 |
if UtilIntf.formatStatus(@local_buffer,sizeof(local_buffer) - 1,Status) > 0 then
|
612 |
Result := strpas(local_buffer);
|
613 |
end;
|
614 |
|
615 |
procedure TFB30ClientAPI.SQLDecFloatEncode(aValue: tBCD; SQLType: cardinal;
|
616 |
bufptr: PByte);
|
617 |
var DecFloat16: IDecFloat16;
|
618 |
DecFloat34: IDecFloat34;
|
619 |
sign: integer;
|
620 |
exp: integer;
|
621 |
buffer: array [1..34] of byte;
|
622 |
|
623 |
procedure UnpackBuffer(width: integer);
|
624 |
var i,j: integer;
|
625 |
begin
|
626 |
Fillchar(buffer,sizeof(buffer),0);
|
627 |
if BCDPrecision(aValue) > width then
|
628 |
IBError(ibxeBCDTooBig,[BCDPrecision(aValue),width]);
|
629 |
j := 1 + (width - aValue.Precision);
|
630 |
for i := 0 to (aValue.Precision - 1) div 2 do
|
631 |
if j <= width then
|
632 |
begin
|
633 |
buffer[j] := (aValue.Fraction[i] and $f0) shr 4;
|
634 |
Inc(j);
|
635 |
if j <= width then
|
636 |
begin
|
637 |
buffer[j] := (aValue.Fraction[i] and $0f);
|
638 |
Inc(j);
|
639 |
end;
|
640 |
end;
|
641 |
{writeln('Precision = ',aValue.Precision,' Places = ',aValue.SignSpecialPlaces and $2f);
|
642 |
write('BCD Buffer = ');
|
643 |
for i := 1 to 34 do
|
644 |
write(buffer[i],' ');
|
645 |
writeln; }
|
646 |
end;
|
647 |
|
648 |
begin
|
649 |
inherited SQLDecFloatEncode(aValue, SQLType, bufptr);
|
650 |
sign := (aValue.SignSpecialPlaces and $80) shr 7;
|
651 |
exp := -(aValue.SignSpecialPlaces and $2f);
|
652 |
|
653 |
case SQLType of
|
654 |
SQL_DEC16:
|
655 |
begin
|
656 |
UnPackbuffer(16);
|
657 |
DecFloat16 := UtilIntf.getDecFloat16(StatusIntf);
|
658 |
Check4DataBaseError;
|
659 |
DecFloat16.fromBcd(sign,@buffer,exp,FB_DEC16Ptr(bufptr));
|
660 |
Check4DataBaseError;
|
661 |
end;
|
662 |
|
663 |
SQL_DEC34:
|
664 |
begin
|
665 |
UnPackbuffer(34);
|
666 |
DecFloat34 := UtilIntf.getDecFloat34(StatusIntf);
|
667 |
Check4DataBaseError;
|
668 |
DecFloat34.fromBcd(sign,@buffer,exp,FB_DEC34Ptr(bufptr));
|
669 |
Check4DataBaseError;
|
670 |
end;
|
671 |
|
672 |
else
|
673 |
IBError(ibxeInvalidDataConversion,[]);
|
674 |
end;
|
675 |
end;
|
676 |
|
677 |
function TFB30ClientAPI.SQLDecFloatDecode(SQLType: cardinal; bufptr: PByte): tBCD;
|
678 |
|
679 |
var DecFloat16: IDecFloat16;
|
680 |
DecFloat34: IDecFloat34;
|
681 |
sign: integer;
|
682 |
exp: integer;
|
683 |
buffer: array [1..38] of byte;
|
684 |
|
685 |
procedure packbuffer(buflen: integer);
|
686 |
var i,j: integer;
|
687 |
begin
|
688 |
{ write('Decode: BCD Buffer = ');
|
689 |
for i := 1 to 34 do
|
690 |
write(buffer[i],' ');
|
691 |
writeln; }
|
692 |
{pack buffer}
|
693 |
i := 1;
|
694 |
while (i <= buflen) and (buffer[i] = 0) do {skip leading zeroes}
|
695 |
inc(i);
|
696 |
|
697 |
j := 0;
|
698 |
Result.Precision := 0;
|
699 |
while i <= buflen do
|
700 |
begin
|
701 |
inc(Result.Precision);
|
702 |
if odd(Result.Precision) then
|
703 |
Result.Fraction[j] := (buffer[i] and $0f) shl 4
|
704 |
else
|
705 |
begin
|
706 |
Result.Fraction[j] := Result.Fraction[j] or (buffer[i] and $0f);
|
707 |
Inc(j);
|
708 |
end;
|
709 |
inc(i);
|
710 |
end;
|
711 |
end;
|
712 |
|
713 |
begin
|
714 |
Result := inherited SQLDecFloatDecode(SQLType, bufptr);
|
715 |
FillChar(Result, sizeof(tBCD),0);
|
716 |
case SQLType of
|
717 |
SQL_DEC16:
|
718 |
begin
|
719 |
DecFloat16 := UtilIntf.getDecFloat16(StatusIntf);
|
720 |
Check4DataBaseError;
|
721 |
DecFloat16.toBcd(FB_DEC16Ptr(bufptr),@sign,@buffer,@exp);
|
722 |
Check4DataBaseError;
|
723 |
packbuffer(16);
|
724 |
end;
|
725 |
|
726 |
SQL_DEC34:
|
727 |
begin
|
728 |
DecFloat34 := UtilIntf.getDecFloat34(StatusIntf);
|
729 |
Check4DataBaseError;
|
730 |
DecFloat34.toBcd(FB_DEC34Ptr(bufptr),@sign,@buffer,@exp);
|
731 |
Check4DataBaseError;
|
732 |
packbuffer(34);
|
733 |
end;
|
734 |
|
735 |
else
|
736 |
IBError(ibxeInvalidDataConversion,[]);
|
737 |
end;
|
738 |
Result.SignSpecialPlaces := (-exp and $2f);
|
739 |
if sign <> 0 then
|
740 |
Result.SignSpecialPlaces := Result.SignSpecialPlaces or $80;
|
741 |
end;
|
742 |
|
743 |
procedure TFB30ClientAPI.StrToInt128(scale: integer; aValue: AnsiString;
|
744 |
bufptr: PByte);
|
745 |
begin
|
746 |
inherited StrToInt128(scale,aValue,bufPtr);
|
747 |
|
748 |
UtilIntf.getInt128(StatusIntf).fromString(StatusIntf,scale,PAnsiChar(aValue),FB_I128Ptr(bufptr));
|
749 |
Check4DatabaseError;
|
750 |
end;
|
751 |
|
752 |
function TFB30ClientAPI.Int128ToStr(bufptr: PByte; scale: integer
|
753 |
): AnsiString;
|
754 |
const
|
755 |
bufLength = 64;
|
756 |
var Buffer: array[ 0.. bufLength] of AnsiChar;
|
757 |
begin
|
758 |
Result := inherited Int128ToStr(bufPtr,scale);
|
759 |
|
760 |
UtilIntf.getInt128(StatusIntf).toString(StatusIntf,FB_I128Ptr(bufptr),scale,buflength,PAnsiChar(@Buffer));
|
761 |
Check4DatabaseError;
|
762 |
Result := strpas(PAnsiChar(@Buffer));
|
763 |
end;
|
764 |
|
765 |
function TFB30ClientAPI.HasLocalTZDB: boolean;
|
766 |
const
|
767 |
bufLength = 128;
|
768 |
var Buffer: ISC_TIME_TZ;
|
769 |
Hr, Mt, S, DMs: cardinal;
|
770 |
tzBuffer: array[ 0.. bufLength] of AnsiChar;
|
771 |
begin
|
772 |
Result := HasTimeZoneSupport;
|
773 |
if Result then
|
774 |
begin
|
775 |
Buffer.utc_time := 0;
|
776 |
Buffer.time_zone := TimeZoneID_GMT;
|
777 |
UtilIntf.decodeTimeTz(StatusIntf, ISC_TIME_TZPtr(@Buffer),@Hr, @Mt, @S, @DMs,bufLength,PAnsiChar(@tzBuffer));
|
778 |
Check4DataBaseError;
|
779 |
Result := strpas(PAnsiChar(@tzBuffer)) <> 'GMT*';
|
780 |
end;
|
781 |
end;
|
782 |
|
783 |
function TFB30ClientAPI.HasTimeZoneSupport: boolean;
|
784 |
begin
|
785 |
Result := Firebird4orLater;
|
786 |
end;
|
787 |
|
788 |
function TFB30ClientAPI.HasExtendedTZSupport: boolean;
|
789 |
begin
|
790 |
Result := Firebird4orLater;
|
791 |
end;
|
792 |
|
793 |
function TFB30ClientAPI.HasInt128Support: boolean;
|
794 |
begin
|
795 |
Result := Firebird4orLater;
|
796 |
end;
|
797 |
|
798 |
end.
|
799 |
|
800 |
|