Another question on this. I am implementing an API for users where I
try to hide all of the libpqxx back-end connection work. So they
essentially either call load(stuff) and get(stuff) when wanting to
push/get data from the database. For the purposes of setting up a
lostream, what is the best way to implement this? Should I create an
ilostream pointer and pass them the pointer? I tried doing this but, it
seems you can't assign one ilostream object to another (perhaps for
obvious reasons that are not obvious to me). And maybe I shouldn't even
try to do this, but I was just trying to make the database interface as
simple as possible for user applications. Thoughts??
ie.
pqxx::ilostream & DBInterface::getBlobStream(int loId)
{
std::string me = "getBlob";
pqxx::work w(*_conn,me);
static pqxx::ilostream loStream(w, loId);
return loStream; //really shouldn't return local var, but just
testing for now
}
....
calling app
...
pqxx::ilostream s = db->getBlob(conn, 137396407)); <== causes
compiler error
Thanks.
Jeroen T. Vermeulen wrote:
> On Thu, September 6, 2007 05:44, Shannon Allen wrote:
>
>> Update:
>>
>> Getting closer. I can now get the size of the lostream and it matches
>> the size of the file before I put it into the BLOB. The problem I'm
>> having now is when I go to write the lostream back out to a file, in
>> Linux whenever I do a cmp originalfile newfile, it says that they are
>> different ("differ: byte 2590721, line 35"). But the sizes match
>> exactly. Anyone have any idea??
>>
>
> Hmm... Unwanted encoding conversion maybe? This stuff has long been
> flushed out of my mental cache, but maybe the LO stream classes need to
> add an ios::binary option somewhere. :-/
>
>
> Jeroen
>
>
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