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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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32
sql/sql_string.cc
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@@ -118,6 +118,38 @@ bool Binary_string::realloc_raw(size_t alloc_length)
}
static uint32 write_float_str_to_buff(char *buff, int buff_len,
float num, uint decimals)
{
if (decimals >= FLOATING_POINT_DECIMALS)
return (uint32)my_gcvt(num, MY_GCVT_ARG_FLOAT, buff_len - 1, buff, NULL);
else
return (uint32)my_fcvt(num, decimals, buff, NULL);
}
bool String::append_float(float num, uint decimals)
{
uint dummy_errors;
size_t len;
DBUG_ASSERT(!std::isnan(num));
DBUG_ASSERT(!std::isinf(num));
if (realloc_with_extra_if_needed(str_length + FLOATING_POINT_BUFFER))
return true;
if (charset()->mbminlen > 1)
{
char buff[FLOATING_POINT_BUFFER];
len= write_float_str_to_buff(buff, sizeof(buff), num, decimals);
str_length+= copy_and_convert(Ptr + str_length, len, charset(), buff, len,
&my_charset_latin1, &dummy_errors);
}
else
str_length+= write_float_str_to_buff(Ptr + str_length,
FLOATING_POINT_BUFFER, num, decimals);
return false;
}
bool String::set_int(longlong num, bool unsigned_flag, CHARSET_INFO *cs)
{
/*