mirror of
https://github.com/MariaDB/server.git
synced 2025-12-28 08:10:14 +00:00
cb37c99dd8
Replacing my_casedn_str() called on local char[] buffer variables
to CharBuffer::copy_casedn() calls.
This is a sub-task for MDEV-31531 Remove my_casedn_str()
Details:
- Adding a helper template class IdentBuffer (a CharBuffer descendant),
which assumes utf8 data. Like CharBuffer, it's initialized to an empty
string in the constructor, but can be populated with lower-cased data
later.
- Adding a helper template class IdentBufferCasedn, which initializes
to lower case right in the constructor.
- Removing char[] buffers, replacing them to IdentBuffer and IdentBufferCasedn.
- Changing the data type of "db" and "table" parameters from
"const char*" to LEX_CSTRING in the following functions:
find_field_in_table_ref()
insert_fields()
set_thd_db()
mysql_grant()
to reuse IdentBuffer easeir.
77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
#ifndef CHAR_BUFFER_INCLUDED
|
|
#define CHAR_BUFFER_INCLUDED
|
|
/*
|
|
Copyright (c) 2023, MariaDB
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; version 2 of
|
|
the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA
|
|
*/
|
|
|
|
|
|
/*
|
|
A string buffer with length.
|
|
This template class is useful to store things like database, table names,
|
|
whose maximum length a small fixed known value. Mainly to be used as
|
|
stack variables to store temporary values.
|
|
|
|
Can store exact string copies or casefolded string copies.
|
|
The stored value is returned as a LEX_CSTRING.
|
|
*/
|
|
template<size_t buff_sz>
|
|
class CharBuffer
|
|
{
|
|
char m_buff[buff_sz + 1 /* one extra byte for '\0' */];
|
|
size_t m_length;
|
|
public:
|
|
CharBuffer()
|
|
:m_length(0)
|
|
{
|
|
m_buff[0]= '\0';
|
|
}
|
|
CharBuffer<buff_sz> & copy_bin(const LEX_CSTRING &str)
|
|
{
|
|
m_length= MY_MIN(buff_sz, str.length);
|
|
memcpy(m_buff, str.str, m_length);
|
|
m_buff[m_length]= '\0';
|
|
return *this;
|
|
}
|
|
CharBuffer<buff_sz> & copy_casedn(CHARSET_INFO *cs, const LEX_CSTRING &str)
|
|
{
|
|
m_length= cs->cset->casedn(cs, str.str, str.length, m_buff, buff_sz);
|
|
/*
|
|
casedn() never writes outsize of buff_sz (unless a bug in casedn()),
|
|
so it's safe to write '\0' at the position m_length:
|
|
*/
|
|
DBUG_ASSERT(m_length <= buff_sz);
|
|
m_buff[m_length]= '\0';
|
|
return *this;
|
|
}
|
|
CharBuffer<buff_sz> & copy_casedn(CHARSET_INFO *cs, const LEX_CSTRING &str,
|
|
bool casedn)
|
|
{
|
|
casedn ? copy_casedn(cs, str) : copy_bin(str);
|
|
return *this;
|
|
}
|
|
LEX_CSTRING to_lex_cstring() const
|
|
{
|
|
return LEX_CSTRING{m_buff, m_length};
|
|
}
|
|
|
|
const char *ptr() const { return m_buff; }
|
|
size_t length() const { return m_length; }
|
|
|
|
};
|
|
|
|
#endif // CHAR_BUFFER_INCLUDED
|