4 ms·

Take a look at the C header <ieee754.h>. It's not on all systems but it provides a union for type punning between a double and its decomposed parts. IEEE754_DOU

Take a look at the C header <ieee754.h>. It's not on all systems but it provides a union for type punning between a double and its decomposed parts. IEEE754_DOUBLE_BIAS is provided for bias correction. The same are available for floats. (Unfortunately, the "not on all systems" part is why I don't use it, but instead copy the union and the constant verbatim into the project if I need it.)

asveikau 4y ago
I thought that type punning via union is against the standard. I personally do not think it should be ... It's a very handy tool.
- electroly 4y ago
  I think it may be a GNU extension to explicitly allow it, but I'm no language lawyer. This header is from glibc; it may explain why it's not available on some platforms.
  - saagarjha 4y ago
    It’s legal in C.
    - asveikau 4y ago
      I think you're right. Most of the top google results seem to be from people who can't mentally separate c and c++. So when i tried to look it up around the time of the comment, i didn't get clear answers.