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cartazio/fixYoMath.r

Last active February 11, 2019 16:27
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NAN NAN you cant get the undefined float value man
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fixYoMath.r
install("inline")# not needed after the first time
library("inline")
nanBoom <- cfunction(c(dummy="ANY"),body="
fenv_t fenv;
unsigned int new_excepts = FE_DIVBYZERO | FE_INVALID ;
fegetenv(&fenv);
fenv.__mxcsr &= ~(new_excepts << 7);
fesetenv(&fenv);
return dummy;
",includes="#include <fenv.h>",language="C")
nanBoom(1)
0.0 /0.0# then R exits silently with SIGFPE and no error handling support
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