ClickHouse/libs/libcommon/include/common/shift10.h
Alexey Milovidov b9e62ddb2d Better #1665
2018-01-13 21:01:31 +03:00

17 lines
377 B
C++

#pragma once
#include <common/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);