fbintf/client/FBAttachment.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 FBAttachment;
{$IFDEF MSWINDOWS} 
{$DEFINE WINDOWS} 
{$ENDIF}

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

interface

uses
  Classes, SysUtils, {$IFDEF WINDOWS} windows, {$ENDIF} IB,  FBParamBlock,
  FBActivityMonitor, FBClientAPI;

type
  TCharsetMap = record
    CharsetID: integer;
    CharSetName: AnsiString;
    CharSetWidth: integer;
    CodePage: TSystemCodePage;
    AllowReverseLookup: boolean; {used to ensure that lookup of CP_UTF* does not return UNICODE_FSS}
  end;

  { TFBAttachment }

  TFBAttachment = class(TActivityHandler)
  private
    FDPB: IDPB;
    FFirebirdAPI: IFirebirdAPI;
    FODSMajorVersion: integer;
    FODSMinorVersion: integer;
    FUserCharSetMap: array of TCharSetMap;
    FSecDatabase: AnsiString;
  protected
    FDatabaseName: AnsiString;
    FRaiseExceptionOnConnectError: boolean;
    FSQLDialect: integer;
    FHasDefaultCharSet: boolean;
    FCharSetID: integer;
    FCodePage: TSystemCodePage;
    FRemoteProtocol: AnsiString;
    FAuthMethod: AnsiString;
    constructor Create(api: TFBClientAPI; DatabaseName: AnsiString; DPB: IDPB;
      RaiseExceptionOnConnectError: boolean);
    procedure CheckHandle; virtual; abstract;
    function GenerateCreateDatabaseSQL(DatabaseName: AnsiString; aDPB: IDPB): AnsiString;
    procedure GetODSAndConnectionInfo;
    function GetDBInfo(ReqBuffer: PByte; ReqBufLen: integer): IDBInformation; virtual; abstract;
    function IsConnected: boolean; virtual; abstract;
    procedure EndAllTransactions;
    procedure DPBFromCreateSQL(CreateSQL: AnsiString);
    procedure SetParameters(SQLParams: ISQLParams; params: array of const);
    procedure UseServerICUChanged; virtual;
  public
    destructor Destroy; override;
    function getFirebirdAPI: IFirebirdAPI;
    function getDPB: IDPB;
    function AllocateBPB: IBPB;
    function AllocateDIRB: IDIRB;
    function StartTransaction(TPB: array of byte; DefaultCompletion: TTransactionCompletion): ITransaction; overload; virtual; abstract;
    function StartTransaction(TPB: ITPB; DefaultCompletion: TTransactionCompletion): ITransaction; overload; virtual; abstract;
    procedure Disconnect(Force: boolean=false); virtual; abstract;
    procedure ExecImmediate(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer); overload; virtual; abstract;
    procedure ExecImmediate(TPB: array of byte; sql: AnsiString; aSQLDialect: integer); overload;
    procedure ExecImmediate(transaction: ITransaction; sql: AnsiString); overload;
    procedure ExecImmediate(TPB: array of byte; sql: AnsiString); overload;
    function ExecuteSQL(TPB: array of byte; sql: AnsiString; SQLDialect: integer; params: array of const): IResults; overload;
    function ExecuteSQL(transaction: ITransaction; sql: AnsiString; SQLDialect: integer; params: array of const): IResults; overload;
    function ExecuteSQL(TPB: array of byte; sql: AnsiString; params: array of const): IResults; overload;
    function ExecuteSQL(transaction: ITransaction; sql: AnsiString; params: array of const): IResults; overload;
    function OpenCursor(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IResultSet; overload;
    function OpenCursor(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer;
                             params: array of const): IResultSet; overload;
    function OpenCursor(transaction: ITransaction; sql: AnsiString): IResultSet; overload;
    function OpenCursor(transaction: ITransaction; sql: AnsiString;
                             params: array of const): IResultSet; overload;
    function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IResultSet; overload;
    function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer;
                             params: array of const): IResultSet; overload;
    function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString): IResultSet; overload;
    function OpenCursorAtStart(transaction: ITransaction; sql: AnsiString;
                             params: array of const): IResultSet; overload;
    function OpenCursorAtStart(sql: AnsiString): IResultSet; overload;
    function OpenCursorAtStart(sql: AnsiString;
                             params: array of const): IResultSet; overload;
    function Prepare(transaction: ITransaction; sql: AnsiString; aSQLDialect: integer): IStatement; overload; virtual; abstract;
    function Prepare(transaction: ITransaction; sql: AnsiString): IStatement; overload;
    function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
                       aSQLDialect: integer; GenerateParamNames: boolean=false;
                       CaseSensitiveParams: boolean = false): IStatement; overload; virtual; abstract;
    function PrepareWithNamedParameters(transaction: ITransaction; sql: AnsiString;
                       GenerateParamNames: boolean=false;
                       CaseSensitiveParams: boolean = false): IStatement; overload;
    function GetEventHandler(Events: TStrings): IEvents; overload; virtual; abstract;
    function GetEventHandler(Event: AnsiString): IEvents; overload;

    function GetSQLDialect: integer;
    function CreateBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BPB: IBPB=nil): IBlob; overload;
    function CreateBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BPB: IBPB=nil): IBlob; overload; virtual; abstract;
    function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; virtual; abstract;
    function OpenBlob(transaction: ITransaction; RelationName, ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload;
    function OpenBlob(transaction: ITransaction; Field: ISQLData; BPB: IBPB=nil): IBlob; overload;
    function CreateArray(transaction: ITransaction; RelationName, ColumnName: AnsiString
      ): IArray; overload;
    function CreateArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData): IArray; overload; virtual; abstract;
    function OpenArray(transaction: ITransaction; RelationName, ColumnName: AnsiString; ArrayID: TISC_QUAD): IArray; overload;
    function OpenArray(transaction: ITransaction; ArrayMetaData: IArrayMetaData; ArrayID: TISC_QUAD): IArray; overload; virtual; abstract;
    property SQLDialect: integer read FSQLDialect;
    property DPB: IDPB read FDPB;
  public
    function GetDBInformation(Requests: array of byte): IDBInformation; overload;
    function GetDBInformation(Request: byte): IDBInformation; overload;
    function GetDBInformation(Requests: IDIRB): IDBInformation; overload;
    function GetConnectString: AnsiString;
    function GetRemoteProtocol: AnsiString;
    function GetAuthenticationMethod: AnsiString;
    function GetSecurityDatabase: AnsiString;
    function GetODSMajorVersion: integer;
    function GetODSMinorVersion: integer;
    function HasDecFloatSupport: boolean; virtual;

  public
    {Character Sets}
    function HasDefaultCharSet: boolean;
    function GetDefaultCharSetID: integer;
    function GetCharsetName(CharSetID: integer): AnsiString;
    function CharSetID2CodePage(CharSetID: integer; var CodePage: TSystemCodePage): boolean;
    function CodePage2CharSetID(CodePage: TSystemCodePage; var CharSetID: integer): boolean;
    function CharSetName2CharSetID(CharSetName: AnsiString; var CharSetID: integer): boolean;
    function CharSetWidth(CharSetID: integer; var Width: integer): boolean;
    procedure RegisterCharSet(CharSetName: AnsiString; CodePage: TSystemCodePage;
      AllowReverseLookup:boolean; out CharSetID: integer);
    function GetBlobMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IBlobMetaData; virtual; abstract;
    function GetArrayMetaData(Transaction: ITransaction; tableName, columnName: AnsiString): IArrayMetaData; virtual; abstract;
    property CharSetID: integer read FCharSetID;
    property CodePage: TSystemCodePage read FCodePage;

  public
    {Time Zone Support}
    function GetTimeZoneServices: ITimeZoneServices; virtual;
    function HasTimeZoneSupport: boolean; virtual;

  end;

  { TDPBItem }

  TDPBItem = class(TParamBlockItem,IDPBItem)
  public
   function getParamTypeName: AnsiString; override;
  end;

  { TDPB }

  TDPB = class (TCustomParamBlock<TDPBItem,IDPBItem>, IDPB)
  protected
   function LookupItemType(ParamTypeName: AnsiString): byte; override;
  public
    constructor Create(api: TFBClientAPI);
    function GetDPBParamTypeName(ParamType: byte): Ansistring;
  end;

implementation

uses FBMessages, IBUtils, FBTransaction {$IFDEF HASREQEX}, RegExpr{$ENDIF};

const
  CharSetMap: array [0..69] of TCharsetMap = (
  (CharsetID: 0; CharSetName: 'NONE'; CharSetWidth: 1; CodePage: CP_ACP; AllowReverseLookup: true),
  (CharsetID: 1; CharSetName: 'OCTETS'; CharSetWidth: 1; CodePage: CP_NONE; AllowReverseLookup: true),
  (CharsetID: 2; CharSetName: 'ASCII'; CharSetWidth: 1; CodePage: CP_ASCII; AllowReverseLookup: true),
  (CharsetID: 3; CharSetName: 'UNICODE_FSS'; CharSetWidth: 3; CodePage: CP_UTF8; AllowReverseLookup: false),
  (CharsetID: 4; CharSetName: 'UTF8'; CharSetWidth: 4; CodePage: CP_UTF8; AllowReverseLookup: true),
  (CharsetID: 5; CharSetName: 'SJIS_0208'; CharSetWidth: 2; CodePage: 20932; AllowReverseLookup: true),
  (CharsetID: 6; CharSetName: 'EUCJ_0208'; CharSetWidth: 2; CodePage: 20932; AllowReverseLookup: true),
  (CharsetID: 7; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: true),
  (CharsetID: 8; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: true),
  (CharsetID: 9; CharSetName: 'DOS737'; CharSetWidth: 1; CodePage: 737; AllowReverseLookup: true),
  (CharsetID: 10; CharSetName: 'DOS437'; CharSetWidth: 1; CodePage: 437; AllowReverseLookup: true),
  (CharsetID: 11; CharSetName: 'DOS850'; CharSetWidth: 1; CodePage: 850; AllowReverseLookup: true),
  (CharsetID: 12; CharSetName: 'DOS865'; CharSetWidth: 1; CodePage: 865; AllowReverseLookup: true),
  (CharsetID: 13; CharSetName: 'DOS860'; CharSetWidth: 1; CodePage: 860; AllowReverseLookup: true),
  (CharsetID: 14; CharSetName: 'DOS863'; CharSetWidth: 1; CodePage: 863; AllowReverseLookup: true),
  (CharsetID: 15; CharSetName: 'DOS775'; CharSetWidth: 1; CodePage: 775; AllowReverseLookup: true),
  (CharsetID: 16; CharSetName: 'DOS858'; CharSetWidth: 1; CodePage: 858; AllowReverseLookup: true),
  (CharsetID: 17; CharSetName: 'DOS862'; CharSetWidth: 1; CodePage: 862; AllowReverseLookup: true),
  (CharsetID: 18; CharSetName: 'DOS864'; CharSetWidth: 1; CodePage: 864; AllowReverseLookup: true),
  (CharsetID: 19; CharSetName: 'NEXT'; CharSetWidth: 1; CodePage: CP_NONE; AllowReverseLookup: true),
  (CharsetID: 20; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: true),
  (CharsetID: 21; CharSetName: 'ISO8859_1'; CharSetWidth: 1; CodePage: 28591; AllowReverseLookup: true),
  (CharsetID: 22; CharSetName: 'ISO8859_2'; CharSetWidth: 1; CodePage: 28592; AllowReverseLookup: true),
  (CharsetID: 23; CharSetName: 'ISO8859_3'; CharSetWidth: 1; CodePage: 28593; AllowReverseLookup: true),
  (CharsetID: 24; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 25; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 26; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 27; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 28; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 29; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 30; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 31; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 32; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 33; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 34; CharSetName: 'ISO8859_4'; CharSetWidth: 1; CodePage: 28594; AllowReverseLookup: true),
  (CharsetID: 35; CharSetName: 'ISO8859_5'; CharSetWidth: 1; CodePage: 28595; AllowReverseLookup: true),
  (CharsetID: 36; CharSetName: 'ISO8859_6'; CharSetWidth: 1; CodePage: 28596; AllowReverseLookup: true),
  (CharsetID: 37; CharSetName: 'ISO8859_7'; CharSetWidth: 1; CodePage: 28597; AllowReverseLookup: true),
  (CharsetID: 38; CharSetName: 'ISO8859_8'; CharSetWidth: 1; CodePage: 28598; AllowReverseLookup: true),
  (CharsetID: 39; CharSetName: 'ISO8859_9'; CharSetWidth: 1; CodePage: 28599; AllowReverseLookup: true),
  (CharsetID: 40; CharSetName: 'ISO8859_13'; CharSetWidth: 1; CodePage: 28603; AllowReverseLookup: true),
  (CharsetID: 41; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 42; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 43; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 44; CharSetName: 'KSC_5601'; CharSetWidth: 2; CodePage: 949; AllowReverseLookup: true),
  (CharsetID: 45; CharSetName: 'DOS852'; CharSetWidth: 1; CodePage: 852; AllowReverseLookup: true),
  (CharsetID: 46; CharSetName: 'DOS857'; CharSetWidth: 1; CodePage: 857; AllowReverseLookup: true),
  (CharsetID: 47; CharSetName: 'DOS861'; CharSetWidth: 1; CodePage: 861; AllowReverseLookup: true),
  (CharsetID: 48; CharSetName: 'DOS866'; CharSetWidth: 1; CodePage: 866; AllowReverseLookup: true),
  (CharsetID: 49; CharSetName: 'DOS869'; CharSetWidth: 1; CodePage: 869; AllowReverseLookup: true),
  (CharsetID: 50; CharSetName: 'CYRL'; CharSetWidth: 1; CodePage: 1251; AllowReverseLookup: true),
  (CharsetID: 51; CharSetName: 'WIN1250'; CharSetWidth: 1; CodePage: 1250; AllowReverseLookup: true),
  (CharsetID: 52; CharSetName: 'WIN1251'; CharSetWidth: 1; CodePage: 1251; AllowReverseLookup: true),
  (CharsetID: 53; CharSetName: 'WIN1252'; CharSetWidth: 1; CodePage: 1252; AllowReverseLookup: true),
  (CharsetID: 54; CharSetName: 'WIN1253'; CharSetWidth: 1; CodePage: 1253; AllowReverseLookup: true),
  (CharsetID: 55; CharSetName: 'WIN1254'; CharSetWidth: 1; CodePage: 1254; AllowReverseLookup: true),
  (CharsetID: 56; CharSetName: 'BIG_5'; CharSetWidth: 2; CodePage: 950; AllowReverseLookup: true),
  (CharsetID: 57; CharSetName: 'GB_2312'; CharSetWidth: 2; CodePage: 936; AllowReverseLookup: true),
  (CharsetID: 58; CharSetName: 'WIN1255'; CharSetWidth: 1; CodePage: 1255; AllowReverseLookup: true),
  (CharsetID: 59; CharSetName: 'WIN1256'; CharSetWidth: 1; CodePage: 1256; AllowReverseLookup: true),
  (CharsetID: 60; CharSetName: 'WIN1257'; CharSetWidth: 1; CodePage: 1257; AllowReverseLookup: true),
  (CharsetID: 61; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 62; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE; AllowReverseLookup: false),
  (CharsetID: 63; CharSetName: 'KOI8R'; CharSetWidth: 1; CodePage: 20866; AllowReverseLookup: true),
  (CharsetID: 64; CharSetName: 'KOI8U'; CharSetWidth: 1; CodePage: 21866; AllowReverseLookup: true),
  (CharsetID: 65; CharSetName: 'WIN1258'; CharSetWidth: 1; CodePage: 1258; AllowReverseLookup: true),
  (CharsetID: 66; CharSetName: 'TIS620'; CharSetWidth: 1; CodePage: 874; AllowReverseLookup: true),
  (CharsetID: 67; CharSetName: 'GBK'; CharSetWidth: 2; CodePage: 936; AllowReverseLookup: true),
  (CharsetID: 68; CharSetName: 'CP943C'; CharSetWidth: 2; CodePage: 943; AllowReverseLookup: true),
  (CharsetID: 69; CharSetName: 'GB18030'; CharSetWidth: 4; CodePage: 54936; AllowReverseLookup: true)
);

const
  isc_dpb_last_dpb_constant = isc_dpb_decfloat_traps;

  DPBConstantNames: array[1..isc_dpb_last_dpb_constant] of string = (
    'cdd_pathname',
    'allocation',
    'journal',
    'page_size',
    'num_buffers',
    'buffer_length',
    'debug',
    'garbage_collect',
    'verify',
    'sweep',
    'enable_journal',
    'disable_journal',
    'dbkey_scope',
    'number_of_users',
    'trace',
    'no_garbage_collect',
    'damaged',
    'license',
    'sys_user_name',
    'encrypt_key',
    'activate_shadow',
    'sweep_interval',
    'delete_shadow',
    'force_write',
    'begin_log',
    'quit_log',
    'no_reserve',
    'user_name',
    'password',
    'password_enc',
    'sys_user_name_enc',
    'interp',
    'online_dump',
    'old_file_size',
    'old_num_files',
    'old_file',
    'old_start_page',
    'old_start_seqno',
    'old_start_file',
    'drop_walfile',
    'old_dump_id',
    'wal_backup_dir',
    'wal_chkptlen',
    'wal_numbufs',
    'wal_bufsize',
    'wal_grp_cmt_wait',
    'lc_messages',
    'lc_ctype',
    'cache_manager',
    'shutdown',
    'online',
    'shutdown_delay',
    'reserved',
    'overwrite',
    'sec_attach',
    'disable_wal',
    'connect_timeout',
    'dummy_packet_interval',
    'gbak_attach',
    'sql_role_name',
    'set_page_buffers',
    'working_directory',
    'sql_dialect',
    'set_db_readonly',
    'set_db_sql_dialect',
    'gfix_attach',
    'gstat_attach',
    'set_db_charset',
    'gsec_attach',
    'address_path' ,
    'process_id',
    'no_db_triggers',
    'trusted_auth',
    'process_name',
    'trusted_role',
    'org_filename',
    'utf8_ilename',
    'ext_call_depth',
    'auth_block',
    'client_version',
    'remote_protocol',
    'host_name',
    'os_user',
    'specific_auth_data',
    'auth_plugin_list',
    'auth_plugin_name',
    'config',
    'nolinger',
    'reset_icu',
    'map_attach',
    'session_time_zone',
    'set_db_replica',
    'set_bind',
    'decfloat_round',
    'decfloat_traps'
    );


{ TFBAttachment }

procedure TFBAttachment.GetODSAndConnectionInfo;
var DBInfo: IDBInformation;
    i: integer;
    Stmt: IStatement;
    ResultSet: IResultSet;
    Param: IDPBItem;
begin
  if not IsConnected then Exit;
  DBInfo := GetDBInformation([isc_info_db_id,isc_info_ods_version,isc_info_ods_minor_version,
                               isc_info_db_SQL_Dialect]);
  for i := 0 to DBInfo.GetCount - 1 do
    with DBInfo[i] do
      case getItemType of
      isc_info_ods_minor_version:
        FODSMinorVersion := getAsInteger;
      isc_info_ods_version:
        FODSMajorVersion := getAsInteger;
      isc_info_db_SQL_Dialect:
        FSQLDialect := getAsInteger;
      end;

  FCharSetID := 0;
  FRemoteProtocol := '';
  FAuthMethod := 'Legacy_Auth';
  FSecDatabase := 'Default';
  if FODSMajorVersion > 11 then
  begin
    Stmt := Prepare(StartTransaction([isc_tpb_read,isc_tpb_nowait,isc_tpb_concurrency],taCommit),
                    'Select MON$CHARACTER_SET_ID, MON$REMOTE_PROTOCOL, MON$AUTH_METHOD, MON$SEC_DATABASE From MON$ATTACHMENTS, MON$DATABASE '+
                    'Where MON$ATTACHMENT_ID = CURRENT_CONNECTION ');
    ResultSet := Stmt.OpenCursor;
    if ResultSet.FetchNext then
    begin
      FCharSetID := ResultSet[0].AsInteger;
      FRemoteProtocol := Trim(ResultSet[1].AsString);
      FAuthMethod := Trim(ResultSet[2].AsString);
      FSecDatabase := Trim(ResultSet[3].AsString);
    end
  end
  else
  if (FODSMajorVersion = 11) and (FODSMinorVersion >= 1) then
  begin
    Stmt := Prepare(StartTransaction([isc_tpb_read,isc_tpb_nowait,isc_tpb_concurrency],taCommit),
                    'Select MON$CHARACTER_SET_ID, MON$REMOTE_PROTOCOL From MON$ATTACHMENTS '+
                    'Where MON$ATTACHMENT_ID = CURRENT_CONNECTION');
    ResultSet := Stmt.OpenCursor;
    if ResultSet.FetchNext then
    begin
      FCharSetID := ResultSet[0].AsInteger;
      FRemoteProtocol := Trim(ResultSet[1].AsString);
    end
  end
  else
  if DPB <> nil then
  begin
    Param :=  DPB.Find(isc_dpb_lc_ctype);
    if (Param = nil) or not CharSetName2CharSetID(Param.AsString,FCharSetID) then
      FCharSetID := 0;
    case GetProtocol(FDatabaseName) of
    TCP:       FRemoteProtocol := 'TCPv4';
    Local:     FRemoteProtocol := '';
    NamedPipe: FRemoteProtocol := 'Netbui';
    SPX:       FRemoteProtocol := 'SPX'
    end;
  end;
  FHasDefaultCharSet := CharSetID2CodePage(FCharSetID,FCodePage) and (FCharSetID > 1);
end;

constructor TFBAttachment.Create(api: TFBClientAPI; DatabaseName: AnsiString;
  DPB: IDPB; RaiseExceptionOnConnectError: boolean);
begin
  inherited Create;
  FFirebirdAPI := api.GetAPI; {Keep reference to interface}
  FSQLDialect := 3;
  FDatabaseName := DatabaseName;
  FDPB := DPB;
  SetLength(FUserCharSetMap,0);
  FRaiseExceptionOnConnectError := RaiseExceptionOnConnectError;
  FODSMajorVersion := 0;
  FODSMinorVersion := 0;
end;

function TFBAttachment.GenerateCreateDatabaseSQL(DatabaseName: AnsiString;  aDPB: IDPB): AnsiString;
var CreateParams: AnsiString;
    DPBItem: IDPBItem;
begin
  CreateParams := '';

  if aDPB <> nil then
  begin
    DPBItem :=  aDPB.Find(isc_dpb_user_name);
    if DPBItem <> nil then
      CreateParams := CreateParams + ' USER ''' + DPBItem.AsString + '''';

    DPBItem :=  aDPB.Find(isc_dpb_password);
    if DPBItem <> nil then
      CreateParams := CreateParams + ' Password ''' + DPBItem.AsString + '''';

    DPBItem :=  aDPB.Find(isc_dpb_page_size);
    if DPBItem <> nil then
      CreateParams := CreateParams + ' PAGE_SIZE ' + DPBItem.AsString;

    DPBItem :=  aDPB.Find(isc_dpb_lc_ctype);
    if DPBItem <> nil then
      CreateParams := CreateParams + ' DEFAULT CHARACTER SET ' + DPBItem.AsString;

    DPBItem :=  aDPB.Find(isc_dpb_sql_dialect);
    if DPBItem <> nil then
      FSQLDialect := DPBItem.AsInteger;
  end;

  Result := 'CREATE DATABASE ''' + DatabaseName + ''' ' + CreateParams; {do not localize}
end;

procedure TFBAttachment.EndAllTransactions;
var i: integer;
    intf: TInterfacedObject;
begin
  for i := 0 to InterfaceCount - 1 do
  begin
    intf := GetInterface(i);
    if (intf <> nil) and  (intf is TFBTransaction) then
      TFBTransaction(intf).DoDefaultTransactionEnd(true);
  end;
end;

{$IFDEF HASREQEX}
procedure TFBAttachment.DPBFromCreateSQL(CreateSQL: AnsiString);
var RegexObj: TRegExpr;
begin
  FDPB := FFirebirdAPI.AllocateDPB;
  RegexObj := TRegExpr.Create;
  try
    {extact database file spec}
    RegexObj.ModifierG := false; {turn off greedy matches}
    RegexObj.ModifierI := true; {case insensitive match}
    RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +''.*'' +USER +''(.+)'' PASSWORD +''(.+)''';
    if RegexObj.Exec(CreateSQL) then
    begin
      DPB.Add(isc_dpb_user_name).AsString := system.copy(CreateSQL,RegexObj.MatchPos[2],RegexObj.MatchLen[2]);
      DPB.Add(isc_dpb_password).AsString := system.copy(CreateSQL,RegexObj.MatchPos[3],RegexObj.MatchLen[3]);
    end
    else
    begin
      RegexObj.Expression := '^ *CREATE +(DATABASE|SCHEMA) +(''.*'') +USER +''(.+)''';
      if RegexObj.Exec(CreateSQL) then
        DPB.Add(isc_dpb_user_name).AsString := system.copy(CreateSQL,RegexObj.MatchPos[2],RegexObj.MatchLen[2]);
    end;
  finally
    RegexObj.Free;
  end;
  if FCharSetID > 0 then
    DPB.Add(isc_dpb_lc_ctype).AsString := GetCharSetName(FCharSetID);
  DPB.Add(isc_dpb_set_db_SQL_dialect).setAsByte(FSQLDialect);
end;
{$ELSE}
procedure TFBAttachment.DPBFromCreateSQL(CreateSQL: AnsiString);
begin
  FDPB := FFirebirdAPI.AllocateDPB;
  if FCharSetID > 0 then
    DPB.Add(isc_dpb_lc_ctype).AsString := GetCharSetName(FCharSetID);
  DPB.Add(isc_dpb_set_db_SQL_dialect).setAsByte(FSQLDialect);
end;
{$ENDIF}

procedure TFBAttachment.SetParameters(SQLParams: ISQLParams;
  params: array of const);
var i: integer;
begin
  if SQLParams.Count <> Length(params) then
    IBError(ibxeInvalidParamCount,[SQLParams.Count,Length(params)]);

  for i := 0 to High(params) do
  begin
    case params[i].vtype of
      vtinteger    :
        SQLParams[i].AsInteger := params[i].vinteger;
      vtInt64:
        SQLParams[i].AsInt64 := params[i].VInt64^;
      {$IF declared (vtQWord)}
      vtQWord:
        SQLParams[i].AsInt64 := params[i].VQWord^;
      {$IFEND}
      vtboolean    :
        SQLParams[i].AsBoolean :=  params[i].vboolean;
      vtchar       :
        SQLParams[i].AsString := params[i].vchar;
      vtextended   :
        SQLParams[i].AsDouble := params[i].VExtended^;
      vtCurrency:
        SQLParams[i].AsDouble := params[i].VCurrency^;
      vtString     :
        SQLParams[i].AsString := strpas(PChar(params[i].VString));
      vtPChar      :
        SQLParams[i].AsString := strpas(params[i].VPChar);
      vtAnsiString :
        SQLParams[i].AsString := strpas(PAnsiChar(params[i].VAnsiString));
      vtVariant:
        SQLParams[i].AsVariant := params[i].VVariant^;
      vtWideChar:
        SQLParams[i].AsString := UTF8Encode(WideCharLenToString(@params[i].VWideChar,1));
      vtPWideChar:
        SQLParams[i].AsString := UTF8Encode(strpas(PWideChar(params[i].VPWideChar)));
      vtWideString:
        SQLParams[i].AsString := UTF8Encode(strpas(PWideChar(params[i].VWideString)));
      vtUnicodeString:
        SQLParams[i].AsString := UTF8Encode(strpas(PWideChar(params[i].VUnicodeString)));
    else
        IBError(ibxeInvalidVariantType,[nil]);
    end;
  end;
end;

procedure TFBAttachment.UseServerICUChanged;
begin
  // Do nothing by default
end;

destructor TFBAttachment.Destroy;
begin
  Disconnect(true);
  inherited Destroy;
end;

function TFBAttachment.getFirebirdAPI: IFirebirdAPI;
begin
  Result := FFirebirdAPI;
end;

function TFBAttachment.getDPB: IDPB;
begin
  Result := FDPB;
end;

function TFBAttachment.AllocateBPB: IBPB;
begin
  Result := TBPB.Create(FFirebirdAPI as TFBClientAPI);
end;

function TFBAttachment.AllocateDIRB: IDIRB;
begin
  Result := TDIRB.Create(FFirebirdAPI as TFBClientAPI);
end;

procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString;
  aSQLDialect: integer);
begin
  ExecImmediate(StartTransaction(TPB,taCommit),sql,aSQLDialect);
end;

procedure TFBAttachment.ExecImmediate(transaction: ITransaction; sql: AnsiString);
begin
  ExecImmediate(transaction,sql,FSQLDialect);
end;

procedure TFBAttachment.ExecImmediate(TPB: array of byte; sql: AnsiString);
begin
  ExecImmediate(StartTransaction(TPB,taCommit),sql,FSQLDialect);
end;

function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString;
  SQLDialect: integer; params: array of const): IResults;
begin
  Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,SQLDialect,params);
end;

function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString;
  SQLDialect: integer; params: array of const): IResults;
begin
  with Prepare(transaction,sql,SQLDialect) do
  begin
    SetParameters(SQLParams,params);
    Result := Execute;
  end;
end;

function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString;
  params: array of const): IResults;
begin
   Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,params);
end;

function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString;
  params: array of const): IResults;
begin
  with Prepare(transaction,sql,FSQLDialect) do
  begin
    SetParameters(SQLParams,params);
    Result := Execute;
  end;
end;

function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString;
  aSQLDialect: integer): IResultSet;
begin
  Result := OpenCursor(transaction,sql,aSQLDialect,[]);
end;

function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString;
  aSQLDialect: integer; params: array of const): IResultSet;
var Statement: IStatement;
begin
  CheckHandle;
  Statement := Prepare(transaction,sql,aSQLDialect);
  SetParameters(Statement.SQLParams,params);
  Result := Statement.OpenCursor;
end;

function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString
  ): IResultSet;
begin
  Result := OpenCursor(transaction,sql,FSQLDialect,[]);
end;

function TFBAttachment.OpenCursor(transaction: ITransaction; sql: AnsiString;
  params: array of const): IResultSet;
begin
  Result := OpenCursor(transaction,sql,FSQLDialect,params);
end;

function TFBAttachment.OpenCursorAtStart(transaction: ITransaction;
  sql: AnsiString; aSQLDialect: integer): IResultSet;
begin
  Result := OpenCursor(transaction,sql,aSQLDialect,[]);
  Result.FetchNext;
end;

function TFBAttachment.OpenCursorAtStart(transaction: ITransaction;
  sql: AnsiString; aSQLDialect: integer; params: array of const): IResultSet;
begin
  Result := OpenCursor(transaction,sql,aSQLDialect,params);
  Result.FetchNext;
end;

function TFBAttachment.OpenCursorAtStart(transaction: ITransaction; sql: AnsiString
  ): IResultSet;
begin
  Result := OpenCursorAtStart(transaction,sql,FSQLDialect,[]);
end;

function TFBAttachment.OpenCursorAtStart(transaction: ITransaction;
  sql: AnsiString; params: array of const): IResultSet;
begin
  Result := OpenCursorAtStart(transaction,sql,FSQLDialect,params);
end;

function TFBAttachment.OpenCursorAtStart(sql: AnsiString): IResultSet;
begin
  Result := OpenCursorAtStart(sql,[]);
end;

function TFBAttachment.OpenCursorAtStart(sql: AnsiString;
  params: array of const): IResultSet;
begin
  Result := OpenCursorAtStart(StartTransaction([isc_tpb_read,isc_tpb_wait,isc_tpb_concurrency],taCommit),sql,FSQLDialect,params);
end;

function TFBAttachment.Prepare(transaction: ITransaction; sql: AnsiString
  ): IStatement;
begin
  Result := Prepare(transaction,sql,FSQLDialect);
end;

function TFBAttachment.PrepareWithNamedParameters(transaction: ITransaction;
  sql: AnsiString; GenerateParamNames: boolean; CaseSensitiveParams: boolean): IStatement;
begin
  Result := PrepareWithNamedParameters(transaction,sql,FSQLDialect,GenerateParamNames,CaseSensitiveParams);
end;

function TFBAttachment.GetEventHandler(Event: AnsiString): IEvents;
var S: TStringList;
begin
  S := TStringList.Create;
  try
    S.Add(Event);
    Result := GetEventHandler(S);
  finally
    S.Free;
  end;
end;

function TFBAttachment.GetSQLDialect: integer;
begin
  Result := FSQLDialect;
end;

function TFBAttachment.CreateBlob(transaction: ITransaction; RelationName,
  ColumnName: AnsiString; BPB: IBPB): IBlob;
begin
  Result := CreateBlob(transaction,GetBlobMetaData(Transaction,RelationName,ColumnName),BPB);
end;

function TFBAttachment.OpenBlob(transaction: ITransaction; RelationName,
  ColumnName: AnsiString; BlobID: TISC_QUAD; BPB: IBPB): IBlob;
begin
  Result := OpenBlob(Transaction,
                GetBlobMetaData(Transaction,RelationName,ColumnName),
                BlobID,BPB);
end;

function TFBAttachment.OpenBlob(transaction: ITransaction; Field: ISQLData;
  BPB: IBPB): IBlob;
begin
  Result := OpenBlob(Transaction,Field.GetBlobMetadata, Field.AsQuad,BPB);
end;

function TFBAttachment.CreateArray(transaction: ITransaction; RelationName,
  ColumnName: AnsiString): IArray;
begin
  Result := CreateArray(transaction,GetArrayMetaData(transaction,RelationName,ColumnName));
end;

function TFBAttachment.OpenArray(transaction: ITransaction; RelationName,
  ColumnName: AnsiString; ArrayID: TISC_QUAD): IArray;
begin
  Result := OpenArray(transaction,
    GetArrayMetaData(transaction,RelationName,ColumnName),ArrayID);
end;

function TFBAttachment.GetDBInformation(Requests: array of byte
  ): IDBInformation;
var ReqBuffer: PByte;
    i: integer;
begin
  CheckHandle;
  if Length(Requests) = 1 then
    Result := GetDBInformation(Requests[0])
  else
  begin
    GetMem(ReqBuffer,Length(Requests));
    try
      for i := 0 to Length(Requests) - 1 do
        ReqBuffer[i] := Requests[i];

      Result := GetDBInfo(ReqBuffer,Length(Requests));

    finally
      FreeMem(ReqBuffer);
    end;
  end;
end;

function TFBAttachment.GetDBInformation(Request: byte): IDBInformation;
begin
  CheckHandle;
  Result := GetDBInfo(@Request,1);
end;

function TFBAttachment.GetDBInformation(Requests: IDIRB): IDBInformation;
begin
  CheckHandle;
  with Requests as TDIRB do
    Result := GetDBInfo(getBuffer,getDataLength);
end;

function TFBAttachment.GetConnectString: AnsiString;
begin
  Result := FDatabaseName;
end;

function TFBAttachment.GetRemoteProtocol: AnsiString;
begin
  Result := FRemoteProtocol;
end;

function TFBAttachment.GetAuthenticationMethod: AnsiString;
begin
  Result := FAuthMethod;
end;

function TFBAttachment.GetSecurityDatabase: AnsiString;
begin
  Result := FSecDatabase;
end;

function TFBAttachment.GetODSMajorVersion: integer;
begin
  Result := FODSMajorVersion;
end;

function TFBAttachment.GetODSMinorVersion: integer;
begin
  Result := FODSMinorVersion;
end;

function TFBAttachment.HasDecFloatSupport: boolean;
begin
  Result := false;
end;

function TFBAttachment.HasDefaultCharSet: boolean;
begin
  Result := FHasDefaultCharSet
end;

function TFBAttachment.GetDefaultCharSetID: integer;
begin
  Result := FCharsetID;
end;

function TFBAttachment.GetCharsetName(CharSetID: integer): AnsiString;
var i: integer;
begin
  Result := '';
  if (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap)) and
                                  (CharSetMap[CharSetID].CharSetID = CharSetID) then
    begin
      Result := CharSetMap[CharSetID].CharSetName;
      Exit;
    end;

  for i := 0 to Length(FUserCharSetMap) - 1 do
    if FUserCharSetMap[i].CharSetID = CharSetID then
    begin
      Result := FUserCharSetMap[i].CharSetName;
      Exit;
    end;
end;

function TFBAttachment.CharSetID2CodePage(CharSetID: integer;
  var CodePage: TSystemCodePage): boolean;
var i: integer;
begin
  Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap))
               and (CharSetMap[CharSetID].CharSetID = CharSetID);
  if Result then
    begin
      CodePage := CharSetMap[CharSetID].CodePage;
      Result := true;
      Exit;
    end;

  for i := 0 to Length(FUserCharSetMap) - 1 do
    if FUserCharSetMap[i].CharSetID = CharSetID then
    begin
      CodePage := FUserCharSetMap[i].CodePage;
      Result := true;
      Exit;
    end;
end;

function TFBAttachment.CodePage2CharSetID(CodePage: TSystemCodePage;
  var CharSetID: integer): boolean;
var i: integer;
begin
  Result := false;
  for i := Low(CharSetMap) to High(CharSetMap) do
    if (CharSetMap[i].AllowReverseLookup) and (CharSetMap[i].CodePage = CodePage) then
    begin
      CharSetID := CharSetMap[i].CharSetID;
      Result := true;
      Exit;
    end;

  for i := 0 to Length(FUserCharSetMap) - 1 do
    if (FUserCharSetMap[i].AllowReverseLookup) and (FUserCharSetMap[i].CodePage = CodePage) then
    begin
      CharSetID := FUserCharSetMap[i].CharSetID;
      Result := true;
      Exit;
    end;
end;

function TFBAttachment.CharSetName2CharSetID(CharSetName: AnsiString;
  var CharSetID: integer): boolean;
var i: integer;
begin
  Result := false;
  for i := Low(CharSetMap) to High(CharSetMap) do
    if AnsiCompareText(CharSetMap[i].CharSetName, CharSetName) = 0 then
    begin
      CharSetID := CharSetMap[i].CharSetID;
      Result := true;
      Exit;
    end;

    for i := 0 to Length(FUserCharSetMap) - 1 do
      if AnsiCompareText(FUserCharSetMap[i].CharSetName, CharSetName) = 0 then
      begin
        CharSetID := FUserCharSetMap[i].CharSetID;
        Result := true;
        Exit;
      end;
end;

function TFBAttachment.CharSetWidth(CharSetID: integer; var Width: integer
  ): boolean;
var i: integer;
begin
  Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap))
               and (CharSetMap[CharSetID].CharSetID = CharSetID);
  if Result then
    begin
      Width := CharSetMap[CharSetID].CharSetWidth;
      Result := true;
      Exit;
    end;

  for i := 0 to Length(FUserCharSetMap) - 1 do
    if FUserCharSetMap[i].CharSetID = CharSetID then
    begin
      Width := FUserCharSetMap[i].CharSetWidth;
      Result := true;
      Exit;
    end;
end;

const
  sqlLookupCharSet = 'Select RDB$CHARACTER_SET_ID, RDB$BYTES_PER_CHARACTER From RDB$CHARACTER_SETS '+
                     'Where RDB$SYSTEM_FLAG = 0 and RDB$CHARACTER_SET_NAME = UPPER(?)';

procedure TFBAttachment.RegisterCharSet(CharSetName: AnsiString;
  CodePage: TSystemCodePage; AllowReverseLookup: boolean; out CharSetID: integer
  );
var CharSets: IResultSet;
    idx: integer;
begin
  if CharSetName2CharSetID(CharSetName,CharSetID) then
    IBError(ibxeCharacterSetExists,[CharSetName]);

  CharSets := OpenCursorAtStart(sqlLookupCharSet,[CharSetName]);
  if CharSets.IsEof then
    IBError(ibxeUnknownUserCharSet,[CharSetName]);

  idx := Length(FUserCharSetMap);
  SetLength(FUserCharSetMap,idx+1);
  FUserCharSetMap[idx].AllowReverseLookup := AllowReverseLookup;
  FUserCharSetMap[idx].CharSetID := CharSets[0].AsInteger;
  FUserCharSetMap[idx].CharSetName := AnsiUpperCase(CharSetName);
  FUserCharSetMap[idx].CharSetWidth := CharSets[1].AsInteger;
  FUserCharSetMap[idx].CodePage := CodePage;
  CharSetID := CharSets[0].AsInteger;
end;

function TFBAttachment.GetTimeZoneServices: ITimeZoneServices;
begin
  IBError(ibxeNotSupported,[]);
end;

function TFBAttachment.HasTimeZoneSupport: boolean;
begin
  Result := false;
end;

{ TDPBItem }

function TDPBItem.getParamTypeName: AnsiString;
begin
  Result := DPBPrefix + DPBConstantNames[getParamType];
end;

{ TDPB }

constructor TDPB.Create(api: TFBClientAPI);
begin
  inherited Create(api);
  FDataLength := 1;
  FBuffer^ := isc_dpb_version1;
end;

function TDPB.GetDPBParamTypeName(ParamType: byte): Ansistring;
begin
  if ParamType <= isc_dpb_last_dpb_constant then
    Result := DPBConstantNames[ParamType]
  else
    Result := '';
end;

function TDPB.LookupItemType(ParamTypeName: AnsiString): byte;
var i: byte;
begin
  Result := 0;
  ParamTypeName := LowerCase(ParamTypeName);
  if (Pos(DPBPrefix, ParamTypeName) = 1) then
    Delete(ParamTypeName, 1, Length(DPBPrefix));

  for i := 1 to isc_dpb_last_dpb_constant do
    if (ParamTypeName = DPBConstantNames[i]) then
    begin
      Result := i;
      break;
    end;
end;

end.

Revision:	315
Committed:	Thu Feb 25 11:56:36 2021 UTC (3 years, 2 months ago) by tony
Content type:	text/x-pascal
File size:	38854 byte(s)
Log Message:	Updated for IBX 4 release