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Simba/Units/MMLAddon/plugins.pas

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{
This file is part of the Mufasa Macro Library (MML)
Copyright (c) 2009 by Raymond van Venetië and Merlijn Wajer
MML is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MML is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with MML. If not, see <http://www.gnu.org/licenses/>.
See the file COPYING, included in this distribution,
for details about the copyright.
Plugins Class for the Mufasa Macro Library
}
unit plugins;
{
Problems with SMART; you cannot free the plugin when smart is open..
Therefore, loading & free-ing plugins per script run is not an option.
Assigning a TMPlugin per Tab might be a do-able solution, but will still cope with the SMART Problems..
So the question is: Plugins Per Tab,Per Run or Global?
}
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, dynlibs, libloader;
const
cv_StdCall = 0; //StdCall
cv_Register = 1; //Register
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type
TPasScriptType = record
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TypeName, TypeDef: string;
end;
TMPluginMethod = record
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FuncPtr: pointer;
FuncStr: string;
FuncConv: integer;
end;
TMPlugin = record
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Methods: array of TMPluginMethod;
MethodLen: integer;
Types: array of TPasScriptType;
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TypesLen: integer;
end;
TMPluginArray = array of TMPlugin;
{ TMPlugins }
TMPlugins = class (TGenericLoader)
private
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Plugins: TMPluginArray;
NumPlugins: integer;
protected
function InitPlugin(plugin: TLibHandle): boolean; override;
public
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property MPlugins: TMPluginArray read Plugins;
property Count: integer read NumPlugins;
end;
implementation
uses
MufasaTypes,FileUtil;
{ TMPlugins }
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function TMPlugins.InitPlugin(Plugin: TLibHandle): boolean;
var
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GetFuncCount: function: integer; stdcall;
GetFuncInfo: function(x: Integer; var ProcAddr: Pointer; var ProcDef: PChar): integer; stdcall;
GetFuncConv: function(x: integer): integer; stdcall;
GetTypeCount: function: integer; stdcall;
GetTypeInfo: function(x: Integer; var sType, sTypeDef: string): integer; stdcall;
PD: PChar;
pntr: Pointer;
ArrC, I: integer;
begin
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Pointer(GetFuncCount) := GetProcAddress(Plugin, PChar('GetFunctionCount'));
if (GetFuncCount = nil) then
begin
Result := False;
Exit;
end;
Pointer(GetFuncInfo) := GetProcAddress(Plugin, PChar('GetFunctionInfo'));
if (GetFuncInfo = nil) then
begin
Result := False;
Exit;
end;
Pointer(GetFuncConv) := GetProcAddress(Plugin, PChar('GetFunctionCallingConv'));
SetLength(Plugins, NumPlugins + 1);
Pointer(GetTypeCount) := GetProcAddress(Plugin, PChar('GetTypeCount'));
if (not (GetTypeCount = nil)) then
begin
Pointer(GetTypeInfo) := GetProcAddress(Plugin, PChar('GetTypeInfo'));
if (not (GetTypeInfo = nil)) then
begin
ArrC := GetTypeCount();
Plugins[NumPlugins].TypesLen := ArrC;
SetLength(Plugins[NumPlugins].Types, ArrC);
for I := 0 to ArrC - 1 do
begin
if (GetTypeInfo(I, Plugins[NumPlugins].Types[I].TypeName, Plugins[NumPlugins].Types[I].TypeDef) < 0) then
begin
Plugins[NumPlugins].Types[I].TypeName := '';
Plugins[NumPlugins].Types[I].TypeDef := '';
end;
end;
end;
end;
ArrC := GetFuncCount();
Plugins[NumPlugins].MethodLen := ArrC;
SetLength(Plugins[NumPlugins].Methods, ArrC);
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PD := StrAlloc(255);
for I := 0 to ArrC - 1 do
begin;
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if (GetFuncInfo(I, pntr, PD) < 0) then
Continue;
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Plugins[NumPlugins].Methods[I].FuncPtr := pntr;
Plugins[NumPlugins].Methods[I].FuncStr := PD;
if (GetFuncConv <> nil) then
Plugins[NumPlugins].Methods[I].FuncConv := GetFuncConv(I)
else
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Plugins[NumPlugins].Methods[I].FuncConv := cv_stdcall;
end;
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StrDispose(PD);
Inc(NumPlugins);
Result := True;
end;
end.