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SiS-Shadowman

Win32 Exceptions

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Hi, I have a small problem regarding Win32 exceptions like overflow, division by zero, etc...

I have to work with some legacy code that performs all kind of ugly operations and casts doubles to integers without validating the parameters first. Although I've disabled floating point exceptions (through the project's code generation property sheet), an "invalid floating point operation" is still thrown at some point, when casting a double to an unsigned short (the double is way too high, but I'm required to ignore it). What could be responsible for throwing that exception in the first place and what can I do to simply ignore it?

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Did you try _controlfp_s?

Something like this should do:


#include <float.h>

unsigned int currentControl;
// Disable floating point exceptions
_controlfp_s(¤tControl, 0, _MCW_EM);

// Restore previous state
_controlfp_s(¤tControl, currentControl, _MCW_EM);

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Thank you very much. I didn't know it was possible to change whether or not hardware exceptions are thrown during runtime, though I suspected it, due to the particular nature of the problem.

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