FreeTDS Development Group

["Lowden, James K" <LowdenJK AT bernstein.com>]

> From: ZIGLIO, Frediano, VF-IT
> Sent: Thursday, June 30, 2005 8:48 AM
> 
> Is current dblib implementation fully binary compatible with
> Microsoft one (that is under Windows) ??
> 
> I asked to myself this question some time ago. Usually windows
> functions follow pascal or "stdcall" ABI however I discovered that
> Win32 follow C ABI that is FreeTDS ABI (only ODBC have different
> ABI compatible with platform one)... This should mean that a program
> that used ntwdblib.dll can be linked (dynamically) directly to our
> library and get a change to run.

The calling convention is OK, but I'm not sure all the compile-time
constants match.  Of course, many functions are missing, and some (cf.
dbopen) follow Sybase's spec.  

It's a useful goal, because Microsoft doesn't ship ntwdblib.dll anymore,
and it suffers from neglect.  Just yesterday bcp_bind() failed because
the column name was 34 characters, and a table with a column named
[open] could not be loaded with bcp.exe.  

--jkl


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