ClickHouse/base/base/shift10.h
2021-10-02 10:13:14 +03:00

17 lines
375 B
C++

#pragma once
#include <base/types.h>
/** Almost the same as x = x * exp10(exponent), but gives more accurate result.
* Example:
* 5 * 1e-11 = 4.9999999999999995e-11
* !=
* 5e-11 = shift10(5.0, -11)
*/
double shift10(double x, int exponent);
float shift10(float x, int exponent);
double shift10(UInt64 x, int exponent);
double shift10(Int64 x, int exponent);