Re: double rounding in xtime_diff()?

Markus Kuhn wrote:

A somewhat related question: Given a floating-point value X, is there in C9X a portable way to get the next smaller and the next larger floating point value?

Yes. Seek for nextafter() or nextafterx() in C9X draft. 7.12.11.3 The nextafter functions Synopsis #include <math.h> double nextafter(double x, double y); float nextafterf(float x, float y); long double nextafterl(long double x, long double y); Description [#2] The nextafter functions determine the next representable value, in the type of the function, after x in the direction of y, where x and y are first converted to the type of the function. Antoine