Enrique Ramirez wrote:
> I noticed what you mean (to reply to my own post). I just noticed the
> original subject and this thread's subject are different:
>
> (original) [sqlite] GCC give a warning while passing a struct as the
> user data to the callback function of sqlite3_exec()
> (this
Enrique Ramirez wrote:
> Looking at your address I can see you also use gmail. Threading for
> this message is working fine for me. Are you using the web client or
> an external mail program?
>
In fact, I'm using thunderbird, but it may doesn't matters. When i
subscribed, I turn digest mode on,
I noticed what you mean (to reply to my own post). I just noticed the
original subject and this thread's subject are different:
(original) [sqlite] GCC give a warning while passing a struct as the
user data to the callback function of sqlite3_exec()
(this thread) [sqlite] GCC give a warning while
Looking at your address I can see you also use gmail. Threading for
this message is working fine for me. Are you using the web client or
an external mail program?
On Tue, Aug 19, 2008 at 8:58 AM, Midmay <[EMAIL PROTECTED]> wrote:
> Greetings,
>
>> As Michael Knigge has suggested, you may just
Greetings,
> As Michael Knigge has suggested, you may just rename the parameter to
> something else and then have something like
>
>MyStruct* data = (MyStruct*)foo;
>
> as the first line in your callback() function.
Got it.
Sorry but I make a mistake before, the '3rd argument' ought to be
Greetings,
> It works. Just ((MyStruct *) data)->x looks strange.
As Michael Knigge has suggested, you may just rename the parameter to
something else and then have something like
MyStruct* data = (MyStruct*)foo;
as the first line in your callback() function.
In fact I believe in C
Thank you, Markus!
> Simply change the type of the first argument to your callback function
> to void* and the problem should go away. Of course you'll then have to
> cast back to MyStruct* inside callback() to actually use the value.
It works. Just ((MyStruct *) data)->x looks strange.
> The
> however, the program runs well. What may causing the warning? what
> should i do to get rid of this warning.
The warning is produced because your callback() isn't
int callback(void *, int, char **, char **);
try this:
int callback(void *foo, int argc, char **argv, char **azColName)
{
Greetings,
> I declare a struct and pass it as the 4th argument of sqlite3_exec(),
> and define the 1st argument of callback function a pointer to this kind
> of struct. while compiling, GCC give a warning like this:
> ae.c: In function ‘main’:
> ae.c:56: warning: passing argument 3
I declare a struct and pass it as the 4th argument of sqlite3_exec(),
and define the 1st argument of callback function a pointer to this kind
of struct. while compiling, GCC give a warning like this:
ae.c: In function ‘main’:
ae.c:56: warning: passing argument 3 of ‘sqlite3_exec’
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