FreeTDS Development Group

[Joe Losco <joe AT sqpuv.com>]

Hello all,
I'm in the process of writing an application for OS X using FreeTDS and 
objective c.  I have come to a point however, that I am pretty confused. 
My application at this point is still using the sample provided with 
FreeTDS as in http://www.freetds.org/userguide/samplecode.htm but I am 
beginning to convert it to be part of a GUI application in Cocoa. 

I first used the sample to make sure that I can use it as shown, and 
with a specific query.  The sample as shown works completely.  I took 
the same code and with minor modifications put it into the GUI app and 
it does not work.  Now to give some more detailed information. 

My problem that I've narrowed it down to is with this stub of code
if (SYBCHAR != pcol->type) {           
               pcol->size = dbwillconvert(pcol->type, SYBCHAR);
           }

I've placed  "printf("name:%s type:%d size:%d\n", pcol->name, 
pcol->type, pcol->size);" around this piece of code so that I can see 
the before and after effects.  In the command line pure C application 
dbwillconvert returns the size of the would be data converted to the 
correct type.  This then lets the memory be allocated properly in the 
later calloc that uses pcol->size+1, as well as everything else to work 
as intended. 

However, in the Objective C/GUI version it appears to return a Bool.  It 
seems to return 1 if it is convertable and 0 if it is not.  This 
obviously messes up the rest of the allocations in the sample resulting 
in truncation and overflow errors.  I then looked into this farther and 
found http://www.freetds.org/reference/a00275.html#ga24 which from what 
I can tell is that the desired effect of that function is to return the 
bool. 

I'm not sure where to go to look for any more information.  Any advice 
is greatly appreciated.
          
--

Joe L