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Paul Eggert authored
Also, improve the doc to match current behavior. * doc/lispref/os.texi (Time Conversion): Document that time-convert signals an error for infinite or NaN args, and that (time-convert TIME t) is exact otherwise. Mention float-time as an alternative to time-convert. (Time Calculations): Document that time-add and time-subtract are exact and do not decrease HZ below the minimum of their args. * src/timefns.c (decode_float_time): Don’t signal an error for floating-point arguments whose base-FLT_RADIX exponent is not less than DBL_MANT_DIG. Instead, convert them to (TICKS . 1) values. Use two (instead of three) integer exponent comparisons in the typical case. * test/src/timefns-tests.el (time-arith-tests): Add more floating-point tests, including some tests that the old code fails.
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