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From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Help me to find an error
Date: Sat, 02 Aug 2014 23:43:07 +0300
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Date: 2014-08-02T23:43:07+03:00
List-Id: <comp.lang.ada>

I am writing open source Ada2012 bindings for Raptor library (it is about 
semantic Web).

My AUnit test case shows that there is an error.

The error is that the `Write(Str, Out_String);` 
(src/test/iostreams_test.adb:32) operator does not appends data to 
Out_String object. The bounded string inside Out_String object remains empty 
and this leads to an error.

My dispatching procedure Do_Write_Bytes (defined in src/rdf-raptor-
iostream.adb:414) is not called an I don't understand why.

Note that in src/rdf-raptor-iostream.ad:345 I create an object holding a 
raptor_iostream* C handler and pass the access to the object itself to the C 
library as user_data parameter, in order to make dispatching calls 
afterward. The callbacks I pass to the C raptor_new_iostream_from_handler 
function are just wrappers which call my object (reconstructed from the 
user_data parameter) dispatching methods.

Please help to understand the reason of the error. This will help not only 
to Raptor itself but also for my bigger project which I am going implement 
in Ada, X-former: http://freesoft.portonvictor.org/namespaces.xml - so your 
help would help to essentially advance free software.

My source is located at
https://github.com/vporton/redland-bindings/tree/ada2012/ada

Please ask me any questions.

-- 
Victor Porton - http://portonvictor.org