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procedure TFBClientAPI.LoadIBLibrary; |
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|
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function IsValidHandle(aHandle: TLibHandle): boolean; |
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begin |
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Result := aHandle > HINSTANCE_ERROR; |
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end; |
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|
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function DoLoadLibrary(LibName: string): TLibHandle; |
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begin |
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Result := LoadLibrary(PChar(LibName)); |
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if IsValidHandle(Result) then |
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begin |
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FFBLibraryName := ExtractFileName(LibName); |
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FFBLibraryPath := ExtractFileDir(LibName); |
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end; |
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end; |
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|
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function GetSpecialFolder(const CSIDL: integer) : string; |
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{$IFDEF FPC} |
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begin |
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Result := GetWindowsSpecialDir(CSIDL); |
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end; |
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{$ELSE} |
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var |
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RecPath : PChar; |
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begin |
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RecPath := StrAlloc(MAX_PATH); |
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try |
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FillChar(RecPath^, MAX_PATH, 0); |
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if SHGetSpecialFolderPath(0, RecPath, CSIDL, false) |
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then result := RecPath |
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else result := ''; |
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finally |
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StrDispose(RecPath); |
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end; |
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end; |
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{$ENDIF} |
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|
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var InstallDir: string; |
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dllPathName: string; |
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oldFirebirdEV: string; |
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begin |
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if IsValidHandle(IBLibrary) then Exit; |
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|
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{First try any user override} |
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dllPathName := GetOverrideLibName; |
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if dllPathName <> '' then |
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begin |
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IBLibrary := DoLoadLibrary(dllPathName); |
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FOwnsIBLibrary := IsValidHandle(IBLibrary); |
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Exit; |
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end; |
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|
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{Then look in application installation directory} |
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InstallDir := ExtractFilePath(Paramstr(0)); {Using ParamStr(0) assumes windows conventions} |
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|
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//First look for Firebird Embedded Server in installation dir |
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if FileExists(InstallDir + FIREBIRD_EMBEDDED) then |
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begin |
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dllPathName := InstallDir + FIREBIRD_EMBEDDED; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end |
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else |
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//Otherwise look for Firebird Client in installation dir |
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if FileExists(InstallDir + FIREBIRD_CLIENT) then |
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begin |
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//assume firebird.conf and firebird.msg in same dir |
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oldFirebirdEV := GetEnvironmentVariable('FIREBIRD'); |
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SetEnvironmentVariable('FIREBIRD',PChar(InstallDir)); |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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try |
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IBLibrary := DoLoadLibrary(dllPathName) |
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finally |
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if not IsValidHandle(IBLibrary) then |
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SetEnvironmentVariable('FIREBIRD',PChar(oldFirebirdEV)); {restore} |
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end; |
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end; |
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|
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// writeln('Dir = ',InstallDir); |
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{If FIREBIRD environment variable available then try this} |
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if not IsValidHandle(IBLibrary) then |
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begin |
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InstallDir := GetEnvironmentVariable('FIREBIRD'); |
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if (length(InstallDir) > 0) and (InstallDir[length(InstallDir)] <> DirectorySeparator) then |
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InstallDir := InstallDir + DirectorySeparator; |
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if (InstallDir <> '') and FileExists(InstallDir + FIREBIRD_CLIENT) then |
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begin |
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//assume firebird.conf and firebird.msg in same dir |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end |
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else |
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if (InstallDir <> '') and FileExists(InstallDir + 'bin' + DirectorySeparator + FIREBIRD_CLIENT) then |
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begin |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end |
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end; |
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|
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if not IsValidHandle(IBLibrary) then |
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{Use Registry key if it exists to locate library} |
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begin |
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with TRegistry.Create do |
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try |
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RootKey := HKEY_LOCAL_MACHINE; |
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if OpenKey('SOFTWARE\Firebird Project\Firebird Server\Instances',false) then |
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begin |
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if ValueExists('DefaultInstance') then |
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begin |
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InstallDir := ReadString('DefaultInstance') + 'bin' + DirectorySeparator ; |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end |
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end |
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finally |
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Free |
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end; |
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|
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{Now try default install dir} |
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if not IsValidHandle(IBLibrary) then |
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begin |
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InstallDir := GetSpecialFolder(CSIDL_PROGRAM_FILES) + |
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DirectorySeparator + 'Firebird' + |
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DirectorySeparator + 'Firebird_3_0' + |
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DirectorySeparator + 'bin' + DirectorySeparator; |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end; |
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|
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if not IsValidHandle(IBLibrary) then |
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begin |
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InstallDir := GetSpecialFolder(CSIDL_PROGRAM_FILES) + |
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DirectorySeparator + 'Firebird' + |
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DirectorySeparator + 'Firebird_2_5' + |
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DirectorySeparator + 'bin' + DirectorySeparator; |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end; |
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|
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if not IsValidHandle(IBLibrary) then |
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begin |
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InstallDir := GetSpecialFolder(CSIDL_PROGRAM_FILES) + |
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DirectorySeparator + 'Firebird' + |
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DirectorySeparator + 'Firebird_2_1' + |
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DirectorySeparator + 'bin' + DirectorySeparator; |
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dllPathName := InstallDir + FIREBIRD_CLIENT; |
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IBLibrary := DoLoadLibrary(dllPathName) |
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end; |
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|
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//Otherwise see if Firebird client is in path |
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//and rely on registry for location of firebird.conf and firebird.msg |
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if not IsValidHandle(IBLibrary) then |
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begin |
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IBLibrary := DoLoadLibrary(FIREBIRD_CLIENT); |
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if IBLibrary <= HINSTANCE_ERROR then |
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//well maybe InterBase is present... |
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IBLibrary := DoLoadLibrary(IBASE_DLL); |
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end; |
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end; |
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FOwnsIBLibrary := IsValidHandle(IBLibrary); |
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end; |
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|
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