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The most portable way of determining if a floating-point exceptional condition has occurred is to use the floating-point exception facilities provided by C in fenv.h [ISO/IEC 9899:2011].
However, the C floating-point exception functions are not without problems. The following caveats exist regarding the interaction between floating-point exceptions and conversions:
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The C standard does not require all implementations to support floating-point exceptions. Each exception macro in fenv.h is defined if, and only if, the corresponding exception is supported. Only implementations that use IEC 60559 (formerly IEEE-754) floating-point arithmetic are required to support all five exceptions defined by C (see Section 7.6.2 [ISO/IEC 9899:2011]). Nevertheless, these functions are the most portable solution for handling floating-point exceptions.
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CERT C++ Secure Coding Standard: FLP03-CPP. Detect and handle floating point errors
ISO/IEC 9899:2011 Section 7.6, "Floating-point environment"
MITRE CWE: CWE-369, "Divide by zero"
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