bdeinfo.pas

jvcl driver development envionment

{******************************************************************

                       JEDI-VCL Demo

 Copyright (C) 2002 Project JEDI

 Original author:

 Contributor(s):

 You may retrieve the latest version of this file at the JEDI-JVCL
 home page, located at http://jvcl.sourceforge.net

 The contents of this file are used with permission, subject to
 the Mozilla Public License Version 1.1 (the "License"); you may
 not use this file except in compliance with the License. You may
 obtain a copy of the License at
 http://www.mozilla.org/MPL/MPL-1_1Final.html

 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.

******************************************************************}

{*******************************************************}
{                                                       }
{     Delphi VCL Extensions (RX) demo program           }
{                                                       }
{     Copyright (c) 1997 Master-Bank                    }
{                                                       }
{*******************************************************}

unit BdeInfo;

{$I jvcl.inc}

interface

uses Classes, {$IFDEF WIN32} Windows, BDE, Registry, {$ELSE} IniFiles,
  DbiTypes, DbiProcs, DbiErrs, {$ENDIF WIN32} SysUtils, DB, DBTables;

{ TBdeInfo }

type
  TBdeInfo = class
  private
    FDllList: TStrings;
    FDirectory: string;
    FCfgPath: string;
    FVer: SYSVersion;
    FConfig: SYSConfig;
    FInfo: SYSInfo;
    procedure UpdateInformation(OnCreate: Boolean);
    procedure UpdateDllList;
    procedure UpdateRegInfo;
    function GetDllCount: Integer;
    function GetBdeDll(Index: Integer): string;
    function GetVersionDateTime: TDateTime;
    function GetNetworkType: string;
    function GetNetUserName: string;
    function GetLanguageDriver: string;
    function GetLangDriverDesc: string;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Update;
    property DllCount: Integer read GetDllCount;
    property BdeDll[Index: Integer]: string read GetBdeDll;
    property BdeDllList: TStrings read FDllList;
    property VersionDateTime: TDateTime read GetVersionDateTime; { Version Date }
    property BdeDirectory: string read FDirectory;
    property ConfigPath: string read FCfgPath;                   { CFG File Path }
    property EngineVersion: Word read FVer.iVersion;             { Engine Version }
    property InterfaceLevel: Word read FVer.iIntfLevel;          { Interface Level }
    property NetworkType: string read GetNetworkType;            { Network Type }
    property NetUserName: string read GetNetUserName;            { Net User Name }
    property LanguageDriver: string read GetLanguageDriver;      { Language Driver }
    property LangDriverDesc: string read GetLangDriverDesc;      { LangDriver Description }
    property BufferSpace: Word read FInfo.iBufferSpace;          { Buffer size, in K }
    property HeapSpace: Word read FInfo.iHeapSpace;              { Heap Space, in K }
    property ActiveDrivers: Word read FInfo.iDrivers;            { Active Drivers }
    property ActiveClients: Word read FInfo.iClients;            { Active Clients }
    property ActiveSessions: Word read FInfo.iSessions;          { Active Sessions }
    property ActiveDatabases: Word read FInfo.iDatabases;        { Active Databases }
    property ActiveCursors: Word read FInfo.iCursors;            { Active Cursors }
  end;

function FieldTypeName(AType: Word): string;
function FieldSubtypeName(ASubtype: Word): string;

implementation

uses JvJCLUtils;

{ TBdeInfo }

constructor TBdeInfo.Create;
begin
  inherited Create;
  FDllList := TStringList.Create;
  UpdateInformation(True);
end;

destructor TBdeInfo.Destroy;
begin
  FDllList.Free;
  inherited Destroy;
end;

procedure TBdeInfo.Update;
begin
  UpdateInformation(False);
end;

procedure TBdeInfo.UpdateRegInfo;
var
  I: Integer;
{$IFDEF WIN32}
  Reg: TRegistry;
begin
  Reg := TRegistry.Create;
  with Reg do
    try
      LazyWrite := False;
      RootKey := HKEY_LOCAL_MACHINE;
      OpenKey('SOFTWARE\Borland\Database Engine', False);
      try
        FDirectory := ReadString('DLLPATH');
        FCfgPath := ReadString('CONFIGFILE01');
      finally
        CloseKey;
      end;
    finally
      Free;
    end;
{$ELSE}
  Ini: TIniFile;
const
  sIDAPI = 'IDAPI';
begin
  Ini := TIniFile.Create('win.ini');
  with Ini do
    try
      FDirectory := ReadString(sIDAPI, 'DLLPATH', '');
      FCfgPath := ReadString(sIDAPI, 'CONFIGFILE01', '');
    finally
      Free;
    end;
{$ENDIF WIN32}
  I := Pos(';', FDirectory);
  if I > 0 then FDirectory := Copy(FDirectory, 1, I - 1);
  I := Pos(';', FCfgPath);
  if I > 0 then FCfgPath := Copy(FCfgPath, 1, I - 1);
  UpdateDllList;
end;

procedure TBdeInfo.UpdateDllList;
var
  Rec: TSearchRec;
  Status: Integer;
begin
  FDLLList.BeginUpdate;
  try
    FDLLList.Clear;
    Status := FindFirst(FDirectory + '\*.dll', faAnyFile, Rec);
    try
      while Status = 0 do begin
        FDLLList.Add(AnsiUpperFirstChar(Rec.Name));
        Status := FindNext(Rec);
      end;
    finally
      FindClose(Rec);
    end;
  finally
    FDLLList.EndUpdate;
  end;
end;

function TBdeInfo.GetDllCount: Integer;
begin
  Result := FDllList.Count;
end;

function TBdeInfo.GetBdeDll(Index: Integer): string;
begin
  Result := FDllList[Index];
end;

procedure TBdeInfo.UpdateInformation(OnCreate: Boolean);
begin
  if OnCreate then begin
    UpdateRegInfo;
    Check(DbiGetSysVersion(FVer));
  end;
  Check(DbiGetSysConfig(FConfig));
  Check(DbiGetSysInfo(FInfo));
end;

function TBdeInfo.GetVersionDateTime: TDateTime;
var
  Hour, Min, MSec, M, D: Word;
  Y: SmallInt;
begin
  Check(DbiDateDecode(FVer.dateVer, M, D, Y));
  Check(DbiTimeDecode(FVer.timeVer, Hour, Min, MSec));
  Result := EncodeDate(Y, M, D) + EncodeTime(Hour, Min, 0, 0);
end;

function TBdeInfo.GetNetworkType: string;
begin
  Result := StrPas(FConfig.szNetType);
end;

function TBdeInfo.GetNetUserName: string;
begin
  Result := StrPas(FConfig.szUserName);
end;

function TBdeInfo.GetLanguageDriver: string;
begin
  Result := StrPas(FConfig.szLangDriver);
end;

function TBdeInfo.GetLangDriverDesc: string;
var
  Cursor: HDBICur;
  Info: LDDesc;
begin
  Result := '';
  Check(DbiOpenLdList(Cursor));
  try
    while DbiGetNextRecord(Cursor, dbiNOLOCK, @Info, nil) = DBIERR_NONE do
      if StrIComp(Info.szName, FConfig.szLangDriver) = 0 then begin
        Result := Format('%s (%d)', [Info.szDesc, Info.iCodePage]);
        Break;
      end;
  finally
    DbiCloseCursor(Cursor);
  end;
end;

function FieldTypeName(AType: Word): string;
const
{$IFDEF COMPILER3_UP}
  MaxTypes = fldCURSOR;
{$ELSE}
  MaxTypes = fldLOCKINFO;
{$ENDIF}
  Types: array [fldUNKNOWN..MaxTypes] of PChar =
    ('Unknown', 'String', 'Date', 'Blob', 'Boolean', 'Int16', 'Int32',
     'Float64', 'Decimal', 'Bytes', 'Time', 'DateTime', 'UInt16', 'UInt32',
     'Float80', 'VarBytes', 'LockInfo'
     {$IFDEF COMPILER3_UP}, 'Oracle Cursor' {$ENDIF});
begin
  if AType < Low(Types) then AType := Low(Types)
  else if AType > High(Types) then AType := Low(Types);
  Result := StrPas(Types[AType]);
end;

function FieldSubtypeName(ASubtype: Word): string;
const
  MaxSubtype = fldstAUTOINC;
  Subtypes: array [fldstMONEY - 1..MaxSubtype] of PChar =
    ('Password', 'Money', 'Memo', 'Binary', 'Formatted Memo', 'OLE',
     'Graphic', 'dBase OLE', 'User Typed', 'Auto Increment');
begin
  Result := '';
  if ASubtype = fldstPASSWORD then ASubtype := Low(Subtypes)
  else begin
    if ASubtype < Low(Subtypes) + 1 then ASubtype := 0
    else if ASubtype > High(Subtypes) then ASubtype := 0;
  end;
  if ASubtype > 0 then Result := StrPas(Subtypes[ASubtype]);
end;

end.