Plugins - Revision history

Manus at 10:18, 28 June 2011

2011-06-28T10:18:18Z

Manus at 10:14, 28 June 2011

2011-06-28T10:14:07Z

Manus: New page: Here are some basic ideas on how to build plugins for Eiffel systems. Given the following code: a: STRING create a.make (4) a.something_polymorphic (x, y) This code is by defaul...

2011-06-28T10:06:21Z

New page: Here are some basic ideas on how to build plugins for Eiffel systems. Given the following code: <e>a: STRING create a.make (4) a.something_polymorphic (x, y) </e> This code is by defaul...

New page

Here are some basic ideas on how to build plugins for Eiffel systems.

Given the following code:

<e>a: STRING
create a.make (4)
a.something_polymorphic (x, y)
</e>

This code is by default generated as follow in two different systems.

* System A:
<c>a = RTLN (25);
F1_24 (a, 4);
(R1_25 (a))(a, x, y);
</c>

* System B:
<c>a = RTLN (23455);
F234_394 (a, 4);
(R234_234 (a))(a, x, y);
</c>

← Older revision		Revision as of 10:14, 28 June 2011
Line 21:		Line 21:
	(R234_234 (a))(a, x, y);		(R234_234 (a))(a, x, y);
	</c>		</c>
		+
		+	So if we want the code of A, the plugin, to be executed properly in the context of B, we need to patch the code of A. Currently this means replacing the ID for the creation (i.e. 25), the address for the static call (i.e. F1_24) and the table content to reflect the new polymorphic call (i.e. R1_25).

@@ Line 13: / Line 13: @@
 <c>a = RTLN (25);
 F1_24 (a, 4);
-(R1_25 (a))(a, x, y);
+(R1_25 (a - min_xx))(a, x, y);
 </c>
@@ Line 19: / Line 19: @@
 <c>a = RTLN (23455);
 F234_394 (a, 4);
-(R234_234 (a))(a, x, y);
+(R234_234 (a - min_yy))(a, x, y);
 </c>
 So if we want the code of A, the plugin, to be executed properly in the context of B, we need to patch the code of A. Currently this means replacing the ID for the creation (i.e. 25), the address for the static call (i.e. F1_24) and the table content to reflect the new polymorphic call (i.e. R1_25).