Converts a floating point value to fixed point.


fixed ftofix(double x);
Converts a floating point value to fixed point. Unlike itofix(), this function clamps values which could overflow the type conversion, setting `errno' to ERANGE in the process if this happens. Example:
      fixed number;
      number = itofix(-40000);
      ASSERT(fixfloor(number) == -32768);
      number = itofix(64000);
      ASSERT(fixfloor(number) == 32767);
      ASSERT(!errno); /* This will fail. */
Returns the value of the floating point value converted to fixed point clamping overflows (and setting `errno').
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