The Dangers of Super Smart Compilers

Re:The Dangers of Super Smart Compilers by barrkel on Sunday December 20, 2015 @11:33AM (#10767437)

Type punning is not fine in C99 - you need to use a correctly typed pointer or a char pointer.

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Re:The Dangers of Super Smart Compilers by Kristine1975 on Sunday December 20, 2015 @12:52PM (#10767678)

You're right. Type punning via pointer cast, e.g.

  int i = ...
  float f = *(float*) &i;

is not fine (violates strict aliasing). Type punning via union, e.g.

  union { int i; float f; } u;
  u.i = ...
  float f = u.f;

is, though (but only in C).

Just use memcpy :-)

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