1 files changed, 193 insertions, 0 deletions
diff --git a/Lua/plugins/SDK/UPluginDefs.pas b/Lua/plugins/SDK/UPluginDefs.pas
new file mode 100644
index 00000000..45bae864
--- /dev/null
+++ b/Lua/plugins/SDK/UPluginDefs.pas
@@ -0,0 +1,193 @@
+unit uPluginDefs;
+{*********************
+  uPluginDefs
+  Some basic structures and functions used to communicate with plugins
+  Usable as Delphi plugin SDK
+*********************}
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+type
+  dword = LongWord;
+
+  //Compatibility with 64 Bit Systems
+  {$IFDEF CPU32}
+  TwParam = integer;
+  TlParam = pointer; //lParam is used for 32 bit addresses. dword is large enough
+  {$ELSE}
+  TwParam = int64;
+  TlParam = pointer; //lParam used for 64 bit addresses in 64 bit systems (FreePascal)
+  {$ENDIF}
+  //wParam is mainly used for ordinals
+  //lparam is mainly used for pointers
+
+  //----------------
+  // TUS_PluginInfo - some infos from plugin to core.
+  // Send when Plugininfo procedure is called
+  // ---
+  // Version structure:
+  // First  byte: Head Revison
+  // Second byte: Sub Revison
+  // Third  byte: Sub Revision 2
+  // Fourth byte: Letter (For Bug Fix releases. 0 or 'a' .. 'z')
+  //----------------
+  PUS_PluginInfo = ^TUS_PluginInfo;
+  TUS_PluginInfo = record
+    cbSize:       integer;    //Size of this record (usefull if record will be extended in the future)
+
+    Name:         array [0..31] of char;      //Name of the Plugin
+    Version:      dword;                      //Version of the Plugin
+    Description:  array [0..127] of char;     //Description, what does this Plugin do
+    Author:       array [0..31] of char;      //Author of this Plugin
+    AuthorEmail:  array [0..63] of char;      //Authors Email
+    Homepage:     array [0..63] of char;      //Homepage of Plugin/Author
+  end;
+  AUS_PluginInfo = array of TUS_PluginInfo;
+  PAUS_PluginInfo = ^AUS_PluginInfo;
+
+  //----------------
+  // TUS_Hook - Structure of the Hook function
+  // Return 0 if the Hook should be continue,
+  // or a non zero Value, if the Hook should be Interuped
+  // In this Case the Caller of the Notifier gets the Return Value
+  // Return Value Should not be -1
+  //----------------
+  TUS_Hook            = function (wParam: TwParam; lParam: TlParam): integer; stdcall;
+  TUS_Hook_of_Object  = function (wParam: TwParam; lParam: TlParam): integer of Object;
+
+  //----------------
+  // TUS_Service - Structure of the Service function
+  // This function is called if the Registered Service is Called
+  // Return Value Should not be SERVICE_NOT_FOUND
+  //----------------
+  TUS_Service           = function (wParam: TwParam; lParam: TlParam): integer; stdcall;
+  TUS_Service_of_Object = function (wParam: TwParam; lParam: TlParam): integer of Object;
+
+  //----------------
+  // TUS_PluginInterface - Structure that Includes all Methods callable
+  // from the Plugins
+  //----------------
+  PUS_PluginInterface = ^TUS_PluginInterface;
+  TUS_PluginInterface = record
+    {******** Hook specific Methods ********}
+    {Function Creates a new Hookable Event and Returns the Handle
+     or 0 on Failure. (Name already exists)}
+    CreateHookableEvent: function (EventName: PChar): THandle; stdcall;
+
+    {Function Destroys an Event and Unhooks all Hooks to this Event.
+     0 on success, not 0 on Failure}
+    DestroyHookableEvent: function (hEvent: THandle): integer; stdcall;
+
+    {Function start calling the Hook Chain
+     0 if Chain is called until the End, -1 if Event Handle is not valid
+     otherwise Return Value of the Hook that breaks the Chain}
+    NotivyEventHooks: function (hEvent: THandle; wParam: TwParam; lParam: TlParam): integer; stdcall;
+
+    {Function Hooks an Event by Name.
+     Returns Hook Handle on Success, otherwise 0}
+    HookEvent: function (EventName: PChar; HookProc: TUS_Hook): THandle; stdcall;
+
+    {Function Removes the Hook from the Chain
+     Returns 0 on Success}
+    UnHookEvent: function (hHook: THandle): integer; stdcall;
+
+    {Function Returns Non Zero if a Event with the given Name Exists,
+     otherwise 0}
+    EventExists: function (EventName: PChar): integer; stdcall;
+
+    {******** Service specific Methods ********}
+    {Function Creates a new Service and Returns the Services Handle
+     or 0 on Failure. (Name already exists)}
+    CreateService: function (ServiceName: PChar; ServiceProc: TUS_Service): THandle; stdcall;
+
+    {Function Destroys a Service.
+     0 on success, not 0 on Failure}
+    DestroyService: function (hService: THandle): integer; stdcall;
+
+    {Function Calls a Services Proc
+     Returns Services Return Value or SERVICE_NOT_FOUND on Failure}
+    CallService: function (ServiceName: PChar; wParam: TwParam; lParam: TlParam): integer; stdcall;
+
+    {Function Returns Non Zero if a Service with the given Name Exists,
+     otherwise 0}
+    ServiceExists: function (ServiceName: PChar): integer; stdcall;
+  end;
+
+  //----------------
+  //TModuleInfo: Info about Modules. Result of Core/GetModuleInfo
+  //----------------
+  PModuleInfo = ^TModuleInfo;
+  TModuleInfo = record
+    Name:         string;
+    Version:      LongWord;
+    Description:  string;
+  end;
+  AModuleInfo = array of TModuleInfo;
+
+  //----------------
+  // Procs that should be exported by Plugin Dlls
+  //----------------
+  //Procedure is called to check if this is USDx Plugin
+  //Info is Pointer to this Plugins Info. Size is already set. Don't write over this limit
+  Proc_PluginInfo = procedure (Info: PUS_PluginInfo); stdcall;
+
+  //Called on Plugins Load. If Non Zero is Returned => abort Loading
+  //PInterface is Pointer to PluginInterface
+  Func_Load = function (const PInterface: PUS_PluginInterface): integer; stdcall;
+
+  //Called on Plugins Init. If Non Zero is Returned => abort Loading
+  //PInterface is Pointer to PluginInterface
+  Func_Init = function (const PInterface: PUS_PluginInterface): integer; stdcall;
+
+  //Called on Plugins Deinit.
+  //PInterface is Pointer to PluginInterface
+  Proc_DeInit = procedure (const PInterface: PUS_PluginInterface); stdcall;
+
+//----------------
+// Some Default Constants
+//----------------
+const
+  {Returned if Service is not found from CallService}
+  SERVICE_NOT_FOUND = LongInt($80000000);
+
+  //for use in Service 'Core/ShowMessage' lParam(Symbol)
+  CORE_SM_NOSYMBOL= 0;
+  CORE_SM_ERROR   = 1;
+  CORE_SM_WARNING = 2;
+  CORE_SM_INFO    = 3;
+
+//----------------
+// Some functions to Handle Version dwords
+//----------------
+function MakeVersion(const HeadRevision, SubVersion, SubVersion2: byte; Letter: char): dword;
+function VersionToString(const Version: dword): string;
+
+implementation
+
+//--------------
+// MakeVersion - converts 4 values to a valid version dword
+//--------------
+function MakeVersion(const HeadRevision, SubVersion, SubVersion2: byte; Letter: char): dword;
+begin
+  if(letter < 'a') or (Letter > 'z') then
+    letter := chr(0);
+
+  Result := (HeadRevision shl 24) or (SubVersion shl 16) or (SubVersion2 shl 8) or Ord(Letter);
+end;
+
+//--------------
+// VersiontoString - Returns some beauty '1.0.2a' like string
+//--------------
+function VersionToString(const Version: dword): string;
+begin // to-do : Write VersiontoString without SysUtils dependence
+  //Result := InttoStr((ver and $FF000000) shr 24);
+  Result := '1.0.1'
+end;
+
+end.