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<p>Well I made an little sample for research with the library <span
class="tlid-translation translation" tabindex="-1" lang="en"><span
title="" class="">because GauchoCAD is more complex and
difficult to follow the code.</span></span></p>
<p>I made an intent of structure translation but I fail again.</p>
<p>Please check the readme.md file in the project there are some
info relevant.<br>
</p>
<p>Regards.<br>
</p>
<div class="moz-cite-prefix">On 1/11/20 4:19, Jussi Lahtinen wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAFJMe7Q414pdQGsODM=hWFAA4TbA2EV_O99H8PMZjJmcryCqiw@mail.gmail.com">
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<div dir="ltr">
<div>Just a quick reply, I'll look it further when I have more
time.</div>
<div>It seems you are passing null pointer as an argument.
Dwg_Data refers to a structure.</div>
<div> See:</div>
<div> <a
href="https://git.savannah.gnu.org/cgit/libredwg.git/tree/include/dwg.h#n8846"
moz-do-not-send="true">https://git.savannah.gnu.org/cgit/libredwg.git/tree/include/dwg.h#n8846</a></div>
<div><a href="http://gambaswiki.org/wiki/lang/structdecl"
moz-do-not-send="true">http://gambaswiki.org/wiki/lang/structdecl</a></div>
<div><br>
</div>
<div>Maybe you can just allocate the memory for it, instead of
implementing it on Gambas.<br>
</div>
<div>Also, please always send a project to demonstrate the
problem, instead of snipped. <br>
</div>
<div><br>
</div>
<div>Jussi<br>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Nov 1, 2020 at 4:19 AM
Martin <<a href="mailto:mbelmonte@belmotek.net"
moz-do-not-send="true">mbelmonte@belmotek.net</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div>
<p>Hi.<br>
</p>
First of all excuse 'nil' knowledge of C since I have just
started trying to use the library with Extern, export or
whatever is the correct name of the method.</div>
<div>I made a module to try to do something with the C
library in Gambas, but as expected it doesn't work :-(</div>
<div><br>
</div>
<div>Note: I am trying to read the number of layers in a dwg
plane, <span lang="en"><span title="">I go step by step
but the goal is to do many more things</span></span></div>
<div><span lang="en"><span title="">See please <b>dwg.h</b></span></span></div>
<div><span lang="en"><span title=""><a
href="https://git.savannah.gnu.org/cgit/libredwg.git/tree/include/dwg.h"
target="_blank" moz-do-not-send="true">https://git.savannah.gnu.org/cgit/libredwg.git/tree/include/dwg.h</a><br>
</span></span></div>
<div><br>
</div>
<div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div>
<div>Library "/usr/local/lib/libredwg:0.0.11"<br>
<br>
'EXPORT int dwg_read_file (const char *restrict filename,
Dwg_Data *restrict dwg);<br>
Private Extern dwg_read_file(filename As String, Dwg_Data
As Pointer) As Integer<br>
<br>
'EXPORT int dxf_read_file (const char *restrict filename,
Dwg_Data *restrict dwg);<br>
Private Extern dxf_read_file(filename As String, Dwg_Data
As Pointer) As Integer<br>
<br>
'EXPORT unsigned int dwg_get_layer_count (const Dwg_Data
*restrict dwg);<br>
Private Extern dwg_get_layer_count(Dwg_Data As Pointer) As
Integer<br>
<br>
Public Function info(f As String) As Pointer<br>
<br>
Dim info As Pointer<br>
Dim i As Integer<br>
Dim q As Integer<br>
<br>
i = dwg_read_file(f, info)<br>
<br>
q = dwg_get_layer_count(info)<br>
<br>
Return q<br>
<br>
End</div>
<div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div>
<div><br>
</div>
<div><br>
</div>
<div>On 21/10/20 4:00, Jussi Lahtinen wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>What kind of help do you need?</div>
<div>Let's say example, this line:</div>
<div> Shell "/usr/local/bin/dwglayers -f '" & sFile
& "' 2>&1 " To sOut</div>
<div><br>
</div>
<div>The problem is to find equivalent function call(s)
(in C) from the API documentation. I personally don't
have the time.</div>
<div>However, many here (including me) can help to
translate the C function calls to Gambas extern
function calls, if that is needed.</div>
<div><br>
</div>
<div>Jussi<br>
</div>
<br>
</div>
On Wed, Oct 21, 2020 at 3:22 AM Martin <<a
href="mailto:mbelmonte@belmotek.net" target="_blank"
moz-do-not-send="true">mbelmonte@belmotek.net</a>>
wrote:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Hi,<br>
I am pleased to announce that GauchoCAD[1], which as
you know is a CAD <br>
made with Gambas, is in good health, at the moment the
program is <br>
capable of opening autocad DWG plans (thanks to
LibreDWG[2]) that close <br>
LibreCAD[3].<br>
We are using the library with the Shell instruction,
which is not the <br>
best in terms of performance.<br>
We need some help in order to do something with Extern
or directly a <br>
gb.component that uses this library. Of course, if
someone does this it <br>
will be useful for many other projects not just
GauchoCAD.<br>
<br>
We need read/write dwg and dxf files more efficiently<br>
<br>
Here we are an script to install LibreDWG in the
system<br>
<br>
#!/bin/bash<br>
git clone git://<a
href="http://git.sv.gnu.org/libredwg.git"
rel="noreferrer" target="_blank"
moz-do-not-send="true">git.sv.gnu.org/libredwg.git</a><br>
cd libredwg<br>
sh autogen.sh<br>
./configure --enable-trace<br>
make<br>
sudo make install<br>
make check<br>
cd ..<br>
<br>
[1] <a href="https://github.com/tercoide/GauchoCAD"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://github.com/tercoide/GauchoCAD</a><br>
<br>
[2] <a href="https://www.gnu.org/software/libredwg/"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://www.gnu.org/software/libredwg/</a><br>
<br>
[3] <a href="https://librecad.org/" rel="noreferrer"
target="_blank" moz-do-not-send="true">https://librecad.org/</a><br>
<br>
Thanks.<br>
Martin Belmonte<br>
<br>
<br>
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href="http://gambaswiki.org/wiki/doc/netiquette"
rel="noreferrer" target="_blank"
moz-do-not-send="true">http://gambaswiki.org/wiki/doc/netiquette</a>
]----<br>
</blockquote>
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<pre>----[ <a href="http://gambaswiki.org/wiki/doc/netiquette" target="_blank" moz-do-not-send="true">http://gambaswiki.org/wiki/doc/netiquette</a> ]----
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