Re: [Vala] A few newbie's questions

[Sandino Flores Moreno <tigrux gmail com>]

Regarding question 1:
==================

Check the next source code:
https://github.com/tigrux/gst-plugin-omap4videodecbin/blob/master/gst/gstomap4videodecbin.vala

There you can see a line like these:
public const Gst.PluginDesc gst_plugin_desc = {
...
}

That's what you are missing in your gstreamer plugin.


Regarding question 2:
==================

Use the method FileStream.gets which corresponds to fgets.
public unowned string FileStream.gets (char[] s);

> From the man page of fgets:
       gets() reads a line from stdin into the buffer pointed to  by  s  until
       either  a  terminating newline or EOF, which it replaces with '\0'.  No
       check for buffer overrun is performed (see BUGS below).

- Sandino

On Thu, Feb 3, 2011 at 3:27 PM, Giulio Paci <giuliopaci gmail com> wrote:
> Hi to all!
>    A few days ago I discovered vala and decided to give it a try, as it
> seems to have almost all the features that I wanted (C code generation,
> non-object oriented code allowed, easy utf-8 string manipulation, regexp
> support, glib integration, easy access to database, fine tuning support).
> I already tested all these features and they are working quite fine.
> Yesterday I also created a binding to libstemmer and it was very easy.
>
> Anyway I faced a couple of issues that I was not able to solve:
>
> 1) I tried to create a gstreamer plugin following the Gstreamer Plugin
> Writer's Guide
> (http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html).
> I was able to create the plugin, but I was not able to create it using
> vala alone, because I was not able to insert in the generated C output
> this code:
>
> #include <glib.h>
> #include <gst/gst.h>
> GST_PLUGIN_DEFINE (
>     GST_VERSION_MAJOR,
>      GST_VERSION_MINOR,
>      "my_filter",
>      "My filter plugin",
>      plugin_init,
>      VERSION,
>      "LGPL",
>      "GStreamer",
>      "http://gstreamer.net/";
>      )
>
> At last I decided it was not a big issue to put this code in a C file,
> but is there any way to directly inject C code in vala?
>
> 2) I tried to read a file, one line at time, using the FileStream
> object, but I was not able to get the desired result with the current
> API, because I needed the whole line (EOL inclusive), while read_line()
> removes it. The work around of adding a new line to each line does not
> allow to know if the last character of the file was a new line or not.
> Is there any way to (easily) read a file including the EOL character?
>
> Thank you very much for your help and work.
> Bests,
>    Giulio.
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