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box: Use isinf() and signbit() when isinff() is not available #188

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box: Use isinf() and signbit() when isinff() is not available #188

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Commits on Jun 18, 2020

  1. box: Use isinf() and signbit() when isinff() is not available 

    Instead of using bytewise comparison, use isinf() and hope it works
correctly with single precision floats on the target platform;
additionally, since the negative return value for negative infinities is
a GNU extension, use signbit() to check if the number is a positive or
negative infinity.
    @ebassi
    ebassi committed Jun 18, 2020
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