[ViewVC] Diff of: public/ibx/trunk/fbintf/client/FBAttachment.pas

Comparing ibx/trunk/fbintf/client/FBAttachment.pas (file contents):
Revision 56 by tony, Mon Mar 6 10:20:02 2017 UTC vs.
Revision 118 by tony, Mon Jan 22 13:58:14 2018 UTC

+unit FBAttachment;
+{$IFDEF MSWINDOWS}
+{$DEFINE WINDOWS}
-+
+{$IF CompilerVersion >= 28}
-+
+{Delphi XE7 onwards}}
-+
+{$define HASREQEX}
-+
+{$IFEND}
+{$ENDIF}
+{$IFDEF FPC}
+{$mode delphi}
+{$interfaces COM}
-+
+{$define HASREQEX}
+{$ENDIF}
+interface
+uses
-<
+  Classes, SysUtils, IB,  FBParamBlock, FBActivityMonitor;
->
+  Classes, SysUtils, {$IFDEF WINDOWS} windows, {$ENDIF} IB,  FBParamBlock, FBActivityMonitor;
+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 }
+  private
+    FDPB: IDPB;
+    FFirebirdAPI: IFirebirdAPI;
-+
+    FODSMajorVersion: integer;
-+
+    FODSMinorVersion: integer;
-+
+    FUserCharSetMap: array of TCharSetMap;
+  protected
+    FDatabaseName: AnsiString;
+    FRaiseExceptionOnConnectError: boolean;
+    FHasDefaultCharSet: boolean;
+    FCharSetID: integer;
+    FCodePage: TSystemCodePage;
-+
+    FRemoteProtocol: AnsiString;
+    constructor Create(DatabaseName: AnsiString; DPB: IDPB;
+      RaiseExceptionOnConnectError: boolean);
+    procedure CheckHandle; virtual; abstract;
+    function GenerateCreateDatabaseSQL(DatabaseName: AnsiString; aDPB: IDPB): AnsiString;
-+
+    procedure GetODSAndConnectionInfo;
-+
+    function IsConnected: boolean; virtual; abstract;
+    procedure EndAllTransactions;
-+
+    procedure DPBFromCreateSQL(CreateSQL: AnsiString);
+    procedure SetParameters(SQLParams: ISQLParams; params: array of const);
+  public
+    destructor Destroy; override;
+    function OpenBlob(transaction: ITransaction; BlobMetaData: IBlobMetaData; BlobID: TISC_QUAD; BPB: IBPB=nil): IBlob; overload; virtual; abstract;
+    function OpenBlob(transaction: ITransaction; Field: ISQLData; BPB: IBPB=nil): IBlob; overload;
+    property SQLDialect: integer read FSQLDialect;
-–
+    property HasDefaultCharSet: boolean read FHasDefaultCharSet;
-–
+    property CharSetID: integer read FCharSetID;
-–
+    property CodePage: TSystemCodePage read FCodePage;
+    property DPB: IDPB read FDPB;
-+
+public
-+
+  function GetDBInformation(Requests: array of byte): IDBInformation; overload; virtual; abstract;
-+
+  function GetDBInformation(Request: byte): IDBInformation; overload; virtual; abstract;
-+
+  function GetConnectString: AnsiString;
-+
+  function GetRemoteProtocol: AnsiString;
-+
+  function GetODSMajorVersion: integer;
-+
+  function GetODSMinorVersion: integer;
-+
+  {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);
-+
+  property CharSetID: integer read FCharSetID;
-+
+  property CodePage: TSystemCodePage read FCodePage;
+  end;
+implementation
-<
+uses FBMessages, FBTransaction;
->
+uses FBMessages, 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)
->
+);
->
->
->
+{ 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;
-+
-+
+  if (FODSMajorVersion > 11) or ((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$ATTACHMENT_ID = CURRENT_CONNECTION');
-+
+    ResultSet := Stmt.OpenCursor;
-+
+    if ResultSet.FetchNext then
-+
+    begin
-+
+      FCharSetID := ResultSet[0].AsInteger;
-+
+      FRemoteProtocol := ResultSet[1].AsString;
-+
+    end
-+
+  end
-+
+  else
-+
+  if DPB <> nil then
-+
+  begin
-+
+    Param :=  DPB.Find(isc_dpb_lc_ctype);
-+
+    if (Param = nil) or not CharSetName2CharSetID(Param.AsString,FCharSetID) then
-+
+      FCharSetID := 0;
-+
+      FRemoteProtocol := '';
-+
+  end
-+
+  else
-+
+  begin
-+
+    FCharSetID := 0;
-+
+    FRemoteProtocol := '';
-+
+  end;
-+
+  FHasDefaultCharSet := CharSetID2CodePage(FCharSetID,FCodePage) and (FCharSetID > 1);
-+
+end;
-+
+constructor TFBAttachment.Create(DatabaseName: AnsiString; DPB: IDPB;
+  RaiseExceptionOnConnectError: boolean);
+begin
+  FSQLDialect := 3;
+  FDatabaseName := DatabaseName;
+  FDPB := DPB;
-+
+  SetLength(FUserCharSetMap,0);
+  FRaiseExceptionOnConnectError := RaiseExceptionOnConnectError;
-+
+  FODSMajorVersion := 0;
-+
+  FODSMinorVersion := 0;
+end;
+function TFBAttachment.GenerateCreateDatabaseSQL(DatabaseName: AnsiString;  aDPB: IDPB): AnsiString;
+  end;
+end;
-+
+{$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;
-+
+{$ELSE}
-+
+procedure TFBAttachment.DPBFromCreateSQL(CreateSQL: AnsiString);
-+
+end;
-+
+{$ENDIF}
-+
+procedure TFBAttachment.SetParameters(SQLParams: ISQLParams;
+  params: array of const);
+var i: integer;
+    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       :
+      vtCurrency:
+        SQLParams[i].AsDouble := params[i].VCurrency^;
+      vtString     :
-<
+        SQLParams[i].AsString := params[i].VString^;
->
+        SQLParams[i].AsString := strpas(PChar(params[i].VString));
+      vtPChar      :
+        SQLParams[i].AsString := strpas(params[i].VPChar);
+      vtAnsiString :
-<
+        SQLParams[i].AsString := AnsiString(params[i].VAnsiString^);
->
+        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;
+function TFBAttachment.ExecuteSQL(TPB: array of byte; sql: AnsiString;
+  SQLDialect: integer; params: array of const): IResults;
+begin
-<
+  Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,FSQLDialect,params);
->
+  Result := ExecuteSQL(StartTransaction(TPB,taCommit),sql,SQLDialect,params);
+end;
+function TFBAttachment.ExecuteSQL(transaction: ITransaction; sql: AnsiString;
+  Result := OpenBlob(Transaction,Field.GetBlobMetadata, Field.AsQuad,BPB);
+end;
-+
+function TFBAttachment.GetConnectString: AnsiString;
-+
+begin
-+
+  Result := FDatabaseName;
-+
+end;
-+
-+
+function TFBAttachment.GetRemoteProtocol: AnsiString;
-+
+begin
-+
+  Result := FRemoteProtocol;
-+
+end;
-+
-+
+function TFBAttachment.GetODSMajorVersion: integer;
-+
+begin
-+
+  Result := FODSMajorVersion;
-+
+end;
-+
-+
+function TFBAttachment.GetODSMinorVersion: integer;
-+
+begin
-+
+  Result := FODSMinorVersion;
-+
+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 AnsiCompareStr(CharSetMap[i].CharSetName, CharSetName) = 0 then
-+
+    begin
-+
+      CharSetID := CharSetMap[i].CharSetID;
-+
+      Result := true;
-+
+      Exit;
-+
+    end;
-+
-+
+    for i := 0 to Length(FUserCharSetMap) - 1 do
-+
+      if AnsiCompareStr(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;
-+
+end.

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing ibx/trunk/fbintf/client/FBAttachment.pas (file contents): Revision 56 by tony, Mon Mar 6 10:20:02 2017 UTC vs. Revision 118 by tony, Mon Jan 22 13:58:14 2018 UTC

Diff Legend

Comparing ibx/trunk/fbintf/client/FBAttachment.pas (file contents):
Revision 56 by tony, Mon Mar 6 10:20:02 2017 UTC vs.
Revision 118 by tony, Mon Jan 22 13:58:14 2018 UTC