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Introduce String::append_float

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This method will write out a float to a String object, keeping the
charset of the original string.

Also have Float::to_string make use of String::append_float
This commit is contained in:
Vicențiu Ciorbaru
2024-07-25 21:52:33 +03:00
committed by Sergei Golubchik
parent 26e599cd32
commit f813ac2a51
3 changed files with 44 additions and 20 deletions
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22
sql/sql_type.cc
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@ -328,27 +328,9 @@ Type_handler_data *type_handler_data= NULL;
bool Float::to_string(String *val_buffer, uint dec) const
{
uint to_length= 70;
if (val_buffer->alloc(to_length))
return true;
char *to=(char*) val_buffer->ptr();
size_t len;
if (dec >= FLOATING_POINT_DECIMALS)
len= my_gcvt(m_value, MY_GCVT_ARG_FLOAT, to_length - 1, to, NULL);
else
{
/*
We are safe here because the buffer length is 70, and
fabs(float) < 10^39, dec < FLOATING_POINT_DECIMALS. So the resulting string
will be not longer than 69 chars + terminating '\0'.
*/
len= my_fcvt(m_value, (int) dec, to, NULL);
}
val_buffer->length((uint) len);
val_buffer->set_charset(&my_charset_numeric);
return false;
val_buffer->length(0);
return val_buffer->append_float(m_value, dec);
}