diff --git a/atbgit.pas b/atbgit.pas
new file mode 100644
index 0000000..81c5a41
--- /dev/null
+++ b/atbgit.pas
@@ -0,0 +1,21 @@
+unit ATBGit;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, CTypes, fpjson, jsonparser;
+
+type
+    function SetFile(const localRepository: String; const fileId: String; const json: TJSONData): Boolean;
+    function SetFileInternal(const localRepository: PChar;
+                             const fileId: PChar;
+                             const json: PChar;
+                             size: cint32): cbool; stdcall;
+
+implementation
+    const DLLName = 'CalculatorCInterface.dll';
+
+end.
+
diff --git a/atbutils.pas b/atbutils.pas
new file mode 100644
index 0000000..fe0aa6c
--- /dev/null
+++ b/atbutils.pas
@@ -0,0 +1,17 @@
+unit ATBUtils;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses Classes, SysUtils, CTypes;
+
+procedure DeleteMem(P: PChar); stdcall;
+
+implementation
+    const DLLName = 'CalculatorCInterface.dll';
+
+procedure DeleteMem(P: PChar); stdcall; external DLLName;
+
+end.
+
diff --git a/atbwebinterface.pas b/atbwebinterface.pas
new file mode 100644
index 0000000..b6b534f
--- /dev/null
+++ b/atbwebinterface.pas
@@ -0,0 +1,136 @@
+unit ATBWebInterface;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses SysUtils, CTypes, fpjson, jsonparser, ATBUtils;
+
+type
+  PTJSONObject = ^TJSONObject;
+
+//
+// public interface
+//
+function GetFileMenu(const localRepository: UTF8String;
+                     jObj: PTJSONObject): Boolean;
+
+function GetFile(const localRepository: UTF8String;
+                 const fileId: UTF8String;
+                 jObj: PTJSONObject): Boolean;
+
+function SetFile(const localRepository: UTF8String;
+                 const fileId: UTF8String;
+                 const jsonData: TJSONData): Boolean;
+
+function GetFileName(const localRepository: UTF8String;
+                     const fileId: UTF8String): UTF8String;
+
+// private c-interface
+function GetFileMenuInternal(const localRepository: PChar): PChar; stdcall;
+function GetFileInternal(const localRepository: PChar; const fileId: PChar): PChar; stdcall;
+function SetFileInternal(const localRepository: PChar; const fileId: PChar;
+                         const json: PChar; size: cint32): cbool; stdcall;
+function GetFileNameInternal(const localRepository: PChar;
+                             const fileId: PChar): PChar; stdcall;
+
+
+implementation
+    const DLLName = 'CalculatorCInterface.dll';
+
+
+    ///
+    function GetFileMenu(const localRepository: UTF8String; jObj: PTJSONObject): Boolean;
+    var
+        p: PChar;
+        fileMenuContent: UTF8String;
+    begin
+        Result := false;
+        try
+            p := GetFileMenuInternal(PChar(Utf8ToAnsi(localRepository)));
+            if p <> nil then begin
+                fileMenuContent := UTF8String(p);
+                jObj^ := GetJSON(fileMenuContent) as TJSONObject;
+                Result := true;
+            end;
+        finally
+            DeleteMem(p);
+        end;
+    end;
+
+    function GetFileName(const localRepository: UTF8String;
+                     const fileId: UTF8String): UTF8String;
+    var
+        p: PChar;
+    begin
+        Result := '';
+        try
+            p := GetFileNameInternal(PChar(Utf8ToAnsi(localRepository)),
+                                     PChar(Utf8ToAnsi(fileId)));
+            if p <> nil then begin
+                Result := UTF8String(p);
+            end;
+        finally
+            DeleteMem(p);
+        end;
+    end;
+
+    function GetFile(const localRepository: UTF8String; const fileId: UTF8String;
+                     jObj: PTJSONObject): Boolean;
+    var
+        p: PChar;
+        fileContent: UTF8String;
+    begin
+        Result := false;
+                try
+            p := GetFileInternal(PChar(Utf8ToAnsi(localRepository)),
+                                 PChar(Utf8ToAnsi(fileId)));
+            if p <> nil then begin
+                fileContent := UTF8String(p);
+                jObj^ := GetJSON(fileContent) as TJSONObject;
+                Result := true;
+            end;
+        finally
+            DeleteMem(p);
+        end;
+    end;
+
+    ///
+    function SetFile(const localRepository: UTF8String; const fileId: UTF8String;
+                     const jsonData: TJSONData): Boolean;
+    var
+        P: PChar;
+        Len: Integer;
+        S: UTF8String;
+    begin
+        try
+            writeLn(jsonData.FormatJSON);
+            S := jsonData.AsJSON;
+            P := PChar(S);
+            Len := System.Length(Utf8ToAnsi(P));
+            Result := SetFileInternal(PChar(Utf8ToAnsi(localRepository)),
+                                      PChar(Utf8ToAnsi(fileId)), P, Len);
+        finally
+        end;
+    end;
+
+    // external c-interface
+    function GetFileInternal(const localRepository: PChar;
+                             const fileId: PChar): PChar; stdcall;
+        external DLLName;
+
+    function GetFileNameInternal(const localRepository: PChar;
+                                 const fileId: PChar): PChar; stdcall;
+        external DLLName;
+
+    function GetFileMenuInternal(const localRepository: PChar): PChar; stdcall;
+        external DLLName;
+
+    function SetFileInternal(const localRepository: PChar;
+                             const fileId: PChar;
+                             const json: PChar;
+                             size: cint32): cbool; stdcall;
+        external DLLName;
+
+end.
+
diff --git a/deploy/atbgit.pas b/deploy/atbgit.pas
new file mode 100644
index 0000000..81c5a41
--- /dev/null
+++ b/deploy/atbgit.pas
@@ -0,0 +1,21 @@
+unit ATBGit;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils, CTypes, fpjson, jsonparser;
+
+type
+    function SetFile(const localRepository: String; const fileId: String; const json: TJSONData): Boolean;
+    function SetFileInternal(const localRepository: PChar;
+                             const fileId: PChar;
+                             const json: PChar;
+                             size: cint32): cbool; stdcall;
+
+implementation
+    const DLLName = 'CalculatorCInterface.dll';
+
+end.
+
diff --git a/deploy/atbutils.pas b/deploy/atbutils.pas
new file mode 100644
index 0000000..fe0aa6c
--- /dev/null
+++ b/deploy/atbutils.pas
@@ -0,0 +1,17 @@
+unit ATBUtils;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses Classes, SysUtils, CTypes;
+
+procedure DeleteMem(P: PChar); stdcall;
+
+implementation
+    const DLLName = 'CalculatorCInterface.dll';
+
+procedure DeleteMem(P: PChar); stdcall; external DLLName;
+
+end.
+
diff --git a/deploy/atbwebinterface.pas b/deploy/atbwebinterface.pas
new file mode 100644
index 0000000..b6b534f
--- /dev/null
+++ b/deploy/atbwebinterface.pas
@@ -0,0 +1,136 @@
+unit ATBWebInterface;
+
+{$mode ObjFPC}{$H+}
+
+interface
+
+uses SysUtils, CTypes, fpjson, jsonparser, ATBUtils;
+
+type
+  PTJSONObject = ^TJSONObject;
+
+//
+// public interface
+//
+function GetFileMenu(const localRepository: UTF8String;
+                     jObj: PTJSONObject): Boolean;
+
+function GetFile(const localRepository: UTF8String;
+                 const fileId: UTF8String;
+                 jObj: PTJSONObject): Boolean;
+
+function SetFile(const localRepository: UTF8String;
+                 const fileId: UTF8String;
+                 const jsonData: TJSONData): Boolean;
+
+function GetFileName(const localRepository: UTF8String;
+                     const fileId: UTF8String): UTF8String;
+
+// private c-interface
+function GetFileMenuInternal(const localRepository: PChar): PChar; stdcall;
+function GetFileInternal(const localRepository: PChar; const fileId: PChar): PChar; stdcall;
+function SetFileInternal(const localRepository: PChar; const fileId: PChar;
+                         const json: PChar; size: cint32): cbool; stdcall;
+function GetFileNameInternal(const localRepository: PChar;
+                             const fileId: PChar): PChar; stdcall;
+
+
+implementation
+    const DLLName = 'CalculatorCInterface.dll';
+
+
+    ///
+    function GetFileMenu(const localRepository: UTF8String; jObj: PTJSONObject): Boolean;
+    var
+        p: PChar;
+        fileMenuContent: UTF8String;
+    begin
+        Result := false;
+        try
+            p := GetFileMenuInternal(PChar(Utf8ToAnsi(localRepository)));
+            if p <> nil then begin
+                fileMenuContent := UTF8String(p);
+                jObj^ := GetJSON(fileMenuContent) as TJSONObject;
+                Result := true;
+            end;
+        finally
+            DeleteMem(p);
+        end;
+    end;
+
+    function GetFileName(const localRepository: UTF8String;
+                     const fileId: UTF8String): UTF8String;
+    var
+        p: PChar;
+    begin
+        Result := '';
+        try
+            p := GetFileNameInternal(PChar(Utf8ToAnsi(localRepository)),
+                                     PChar(Utf8ToAnsi(fileId)));
+            if p <> nil then begin
+                Result := UTF8String(p);
+            end;
+        finally
+            DeleteMem(p);
+        end;
+    end;
+
+    function GetFile(const localRepository: UTF8String; const fileId: UTF8String;
+                     jObj: PTJSONObject): Boolean;
+    var
+        p: PChar;
+        fileContent: UTF8String;
+    begin
+        Result := false;
+                try
+            p := GetFileInternal(PChar(Utf8ToAnsi(localRepository)),
+                                 PChar(Utf8ToAnsi(fileId)));
+            if p <> nil then begin
+                fileContent := UTF8String(p);
+                jObj^ := GetJSON(fileContent) as TJSONObject;
+                Result := true;
+            end;
+        finally
+            DeleteMem(p);
+        end;
+    end;
+
+    ///
+    function SetFile(const localRepository: UTF8String; const fileId: UTF8String;
+                     const jsonData: TJSONData): Boolean;
+    var
+        P: PChar;
+        Len: Integer;
+        S: UTF8String;
+    begin
+        try
+            writeLn(jsonData.FormatJSON);
+            S := jsonData.AsJSON;
+            P := PChar(S);
+            Len := System.Length(Utf8ToAnsi(P));
+            Result := SetFileInternal(PChar(Utf8ToAnsi(localRepository)),
+                                      PChar(Utf8ToAnsi(fileId)), P, Len);
+        finally
+        end;
+    end;
+
+    // external c-interface
+    function GetFileInternal(const localRepository: PChar;
+                             const fileId: PChar): PChar; stdcall;
+        external DLLName;
+
+    function GetFileNameInternal(const localRepository: PChar;
+                                 const fileId: PChar): PChar; stdcall;
+        external DLLName;
+
+    function GetFileMenuInternal(const localRepository: PChar): PChar; stdcall;
+        external DLLName;
+
+    function SetFileInternal(const localRepository: PChar;
+                             const fileId: PChar;
+                             const json: PChar;
+                             size: cint32): cbool; stdcall;
+        external DLLName;
+
+end.
+