On Apr 8, 2008, at 2:16 AM, Ken wrote:
> Dan,
>
> Doesn't that just return the VFS part ??? I'm looking for the
> sqlite3_io_methods part for the default vfs ( or is this really
> the sqlite3_file )?
Right. Sorry, I didn't read carefully. :)
I don't really see why you will need it unless you do intend
to open the underlying journal file. The sqlite3_io_methods
structure contains methods you can invoke on a file only after
it has been opened (i.e. xRead(), xWrite()).
When your vfs opens "real" files, you need to call:
pDefaultVfs->xOpen(pDefaultVfs, zFile, pOut, flags, &outflags);
Where pOut is a pointer of type sqlite3_file* that points to
at least pDefaultVfs->szOsFile bytes of free space. The default
vfs implementation will populate pOut->methods with a pointer
to the sqlite3_io_methods structure that contains the methods
for the default "real" file implementation.
Dan.
>
> Thanks,
> Ken
>
>
> Dan <[EMAIL PROTECTED]> wrote:
> On Apr 8, 2008, at 2:03 AM, Ken wrote:
>
>> Hi all,
>>
>> I'm trying to implement a vfs that will disable journalling.
>>
>> But i've hit a little stumbling block / learning curve.
>>
>> In the vfs implementation I need to implement a sqlite3_io_methods
>> type. Basically I'd like to get the default sqlite3_io_methods and
>> use those as part of my code as follows:
>>
>> // IO_METHOD_OPEN
>> njOpen(..) {
>> if (JOURNAL) return ;
>>
>> default_IO_Open(...) ;
>> }
>>
>> // VFS call
>> nonJournalOpen ( ... ) {
>> static sqlite3_io_methods njMethods = {
>> 1,
>> njOpen, ... } ;
>>
>> }
>>
>>
>> How do I get the address of sqlites default I/O methods?
>
> sqlite3_vfs *pDefaultVfs = sqlite_vfs_find(0);
>
> Dan.
>
>
>
>>
>> Thanks for any suggestions.
>>
>>
>>
>> _______________________________________________
>> sqlite-users mailing list
>> sqlite-users@sqlite.org
>> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
>
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