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July 2004
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2004.07.11 21:35 "Re: CVS libtiff & thandle_t", by Bob Friesenhahn
On Mon, 12 Jul 2004, Andrey Kiselev wrote: > On Sun, Jul 11, 2004 at 10:16:54AM -0500, Bob Friesenhahn wrote: > > typedef int thandle_t; /* client data handle */ > > #endif > > > > Note that outside of Windows, thandle_t is is typedef 'int'. > > ImageMagick, GraphicsMagick, and likely other software, have been > > passing pointers via the thandle_t argument of TIFFClientOpen() since > > thandle_t used to be defined as void*. > > Bob, thanks for pointing that, fixed. The other key point is that it seemed that libtiff was relying on the operating system's off_t type and now libtiff is defining a type to specifically handle 4 GB offsets. For 64-bit CPUs this represents an ABI change because off_t is likely a 'long' (64 bit) type rather than a 32-bit type. Libtiff's change makes sense for 32-bit CPUs. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us http://www.simplesystems.org/users/bfriesen