Setextensions

[Bart Pietercil]

On 29-mei-07, at 18:05, Ruslan Zasukhin wrote:

> On 29/5/07 6:22 PM, "Bart Pietercil" <bart.pietercil at gmail.com> wrote:
>
>>> All your questions will be answered as only you note this:
>>>
>>>     engine just have 4 global variables,
>>>     that keep these 4 strings.
>>>
>>>     db.Create() look here and create new files using them.
>>>     The same for db.Open()
>>>
>>>> Can I do multiple calls to Valentina.SetExtensions within one
>>>> session ?
>>>
>>> Yes, just override variables
>>
>> Now this is valuable info to put in the Wiki :-)
>>
>> Which leads of course to the next question ( the fool can always ask
>> more then the wise man can answer):
>>
>> While I can see where Create uses the extensions for (SETTING the
>> extensions on the needed files) this is not completely clear for Open
>>
>> Since I pass  the filename (folderitem) of the descriptorfile
>> (normally ".vdb") to the Open function AND the header of this file
>> describes the tree other extensions needed (data,blob,ind) why would
>> Open still need to look at the settings of the globals in the  
>> engine ?
>
> Because "HEADER"  DO NOT describe them :)

This sentence in the WIKI made me belief it did store them:

Valentina stores these extensions in the header of Description  
Volume, so if you trash Index Volume then Valentina is able create it  
again with assigned extension.


Bart