can anybody please tell me how to properly convert from void* to void[] as the code below?

void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }

Le Wed, 06 May 2009 10:17:47 +0200, gabrielsylar <noreply@email.com> a écrit:

> can anybody please tell me how to properly convert from void* to void[]
> as the code below?
>
> void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }

Something like could works :
  return *( cast(void[]*) sqlite3_column_blob(stmt, n) ) ;

gabrielsylar wrote:
> can anybody please tell me how to properly convert from void* to void[]
> as the code below?
> 
> void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }

void[] has a length, so you have to know the length. Assuming the length is n... Maybe try something like this (untested):

struct DynArray
{
    public void* ptr;
    public size_t length;
    public T[] toArray(T)() { return cast(T[]) cast(void*) (*this); }
}

void[] get_bytes(int n)
{
    return DynArray(sqlite3_column_blob(stmt, n), n).toArray!(void);
}

Le Wed, 06 May 2009 10:33:33 +0200, TSalm <TSalm@free.fr> a écrit:

> Le Wed, 06 May 2009 10:17:47 +0200, gabrielsylar <noreply@email.com> a écrit:
>
>> can anybody please tell me how to properly convert from void* to void[]
>> as the code below?
>>
>> void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }
>
> Something like could works :
>    return *( cast(void[]*) sqlite3_column_blob(stmt, n) ) ;
>


Forget my example, it's wrong.
Sorry.

gabrielsylar Wrote:

> can anybody please tell me how to properly convert from void* to void[] as the code below?
> 
> void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }

return sqlite3_column_blob(stmt, n)[0 .. n];

gabrielsylar wrote:
> can anybody please tell me how to properly convert from void* to void[] as the code below?
> 
> void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }

In unrelated matters: if you're writing a sqlite3 binding, take a look at tools.sqlite3. :)

http://dsource.org/projects/scrapple/browser/trunk/tools/tools/sqlite3.d

downs Wrote:

> gabrielsylar wrote:
> > can anybody please tell me how to properly convert from void* to void[] as the code below?
> > 
> > void[] get_bytes(int n) { return sqlite3_column_blob(stmt, n); }
> 
> In unrelated matters: if you're writing a sqlite3 binding, take a look at tools.sqlite3. :)
> 
> http://dsource.org/projects/scrapple/browser/trunk/tools/tools/sqlite3.d

thanks, but im writing my own simple wrapper around sqlite3.dll(so) dynamic loadable library