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Better #1665

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This commit is contained in:
Alexey Milovidov 2018-01-14 00:26:08 +03:00
parent 21a5ace37c
commit 460cba0e9d
1 changed files with 7 additions and 9 deletions
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16
dbms/src/IO/readFloatText.h
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@ -287,15 +287,18 @@ ReturnType readFloatTextFastImpl(T & x, ReadBuffer & in)
int read_digits = in.count() - count_after_sign;
int before_point_additional_exponent = 0;
if (read_digits > significant_digits)
before_point_additional_exponent = read_digits - significant_digits;
if (unlikely(read_digits > significant_digits))
{
int before_point_additional_exponent = read_digits - significant_digits;
x = shift10(before_point, before_point_additional_exponent);
}
else
{
x = before_point;
/// Shortcut for the common case when there is an integer that fit in Int64.
if (read_digits && (in.eof() || *in.position() < '.'))
{
x = before_point;
if (negative)
x = -x;
return ReturnType(true);
@ -318,11 +321,6 @@ ReturnType readFloatTextFastImpl(T & x, ReadBuffer & in)
exponent = -exponent;
}
if (unlikely(before_point_additional_exponent))
x = shift10(before_point, before_point_additional_exponent);
else
x = before_point;
if (after_point)
x += shift10(after_point, after_point_exponent);