[Numpy-tickets] [NumPy] #582: Crash when embedded using Borland Builder 6

NumPy numpy-tickets@scipy....
Fri Sep 21 05:18:47 CDT 2007


#582: Crash when embedded using Borland Builder 6
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 Reporter:  thomas      |        Owner:  somebody     
     Type:  defect      |       Status:  reopened     
 Priority:  normal      |    Milestone:  1.0.4 Release
Component:  numpy.core  |      Version:  none         
 Severity:  major       |   Resolution:               
 Keywords:              |  
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Comment (by thomas):

 Yes, that does the trick. That was quick!

 For the files, uncensored and complete: The current method of
 "calculating" infinity relies on the compiler to generate code that
 returns infinity on overflows. The Borland C++ Compiler seems to unmask
 exception handling for overflows, so this code won't work but throw an
 exception instead. If you want to stick to the current code (which should
 be perfectly fine), you have to put your FPU into the defined state to not
 throw this exception, which can be accomplished by running
 _control87(MCW_EM, MCW_EM); beforehand.

 Thanks a lot! I hope this patch will make its way into the next release,
 so that integrating numpy into bcc applications will be possible without
 additional tricks.

 By the way, Stefan, about your endianness-question: a nice way to check
 for that is to write "1" into the first bit of a multibyte integer and see
 whether the integer has the value of 1 afterwards. If so, we hit the least
 significant byte (not bit!) and thus we're on little endian. Otherwise we
 will get the value of 2^something, so the first byte was the most
 significant byte and we're on a big endian machine.

-- 
Ticket URL: <http://scipy.org/scipy/numpy/ticket/582#comment:5>
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