Re: [gnome-db] Gda_Value_Stringify of a double

[Juan Pablo <jpdborgna yahoo com ar>]

El lun, 23-10-2006 a las 15:13 +0200, Murray Cumming escribió:
> On Mon, 2006-10-23 at 09:51 -0300, Juan Pablo wrote:
> > Hello list.
> > When i use this function with a gda value double, it generates a 2
> > decimal number, rounding it up. For example, 0.895 double becomes "0.90"
> > string.
> > I would like to have 4 decimas. Is this a parameter?
> 
> I can't see what possible use this function has:
> 
Its usefull if you have a timestamp (for instance) and want to show it
in a gtk_tree_view. I use a G_TYPE_STRING for the column type.


Saludos, Juan Pablo.
> /**
>  * gda_value_stringify
>  * @value: a #GValue.
>  *
>  * Converts a GValue to its string representation which is a human
> readable value. Note that the
>  * returned string does not take into account the current locale of the
> user (on the contrary to the
>  * #GdaDataHandler objects).
>  *
>  * Dates are converted in a YYYY-MM-DD format.
>  *
>  * Returns: a new string, or %NULL if the conversion cannot be done.
> Free the value with a g_free() when you've finished
>  * using it. 
>  */
> 
> It says that string is meant to be human-readable, but it ignores the
> current locale, and it makes assumptions about the numeric formatting
> wanted. So it's no use for actually showing to a human. I suggest that
> it be marked as "useful only for debugging, and not for showing values
> in your user interface."
> 
> > Meanwhile, i made a function wich does the same BUT it uses a static
> > buffer for the return and the format is parametrizable. No need to use
> > intermediate variables which needs to be freed. 
> > Is there any reason to not to do so with gda_value_stringify? (the
> > static char part) If the string is needed on a new var you just strdup
> > it.
> 

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