mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
2f4b0ba328
- Lex_ident_cli* into a new file sql/lex_ident_cli.h - Lex_ident_sys* into a new file sql/lex_ident_sys.h - Well_formed_prefix into include/m_ctype.h This change is needed to the optimizer hint parser coming soon.
122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
/* Copyright (c) 2000, 2019, Oracle and/or its affiliates.
|
|
Copyright (c) 2010, 2024, MariaDB Corporation.
|
|
|
|
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 */
|
|
|
|
|
|
#ifndef LEX_IDENT_CLI
|
|
#define LEX_IDENT_CLI
|
|
|
|
#include "my_global.h"
|
|
#include "m_ctype.h"
|
|
|
|
|
|
/**
|
|
A string with metadata. Usually points to a string in the client
|
|
character set, but unlike Lex_ident_cli_st (see below) it does not
|
|
necessarily point to a query fragment. It can also point to memory
|
|
of other kinds (e.g. an additional THD allocated memory buffer
|
|
not overlapping with the current query text).
|
|
|
|
We'll add more flags here eventually, to know if the string has, e.g.:
|
|
- multi-byte characters
|
|
- bad byte sequences
|
|
- backslash escapes: 'a\nb'
|
|
and reuse the original query fragments instead of making the string
|
|
copy too early, in Lex_input_stream::get_text().
|
|
This will allow to avoid unnecessary copying, as well as
|
|
create more optimal Item types in sql_yacc.yy
|
|
*/
|
|
struct Lex_string_with_metadata_st: public LEX_CSTRING
|
|
{
|
|
private:
|
|
bool m_is_8bit; // True if the string has 8bit characters
|
|
char m_quote; // Quote character, or 0 if not quoted
|
|
public:
|
|
void set_8bit(bool is_8bit) { m_is_8bit= is_8bit; }
|
|
void set_metadata(bool is_8bit, char quote)
|
|
{
|
|
m_is_8bit= is_8bit;
|
|
m_quote= quote;
|
|
}
|
|
void set(const char *s, size_t len, bool is_8bit, char quote)
|
|
{
|
|
str= s;
|
|
length= len;
|
|
set_metadata(is_8bit, quote);
|
|
}
|
|
void set(const LEX_CSTRING *s, bool is_8bit, char quote)
|
|
{
|
|
((LEX_CSTRING &)*this)= *s;
|
|
set_metadata(is_8bit, quote);
|
|
}
|
|
bool is_8bit() const { return m_is_8bit; }
|
|
bool is_quoted() const { return m_quote != '\0'; }
|
|
char quote() const { return m_quote; }
|
|
// Get string repertoire by the 8-bit flag and the character set
|
|
my_repertoire_t repertoire(CHARSET_INFO *cs) const
|
|
{
|
|
return !m_is_8bit && my_charset_is_ascii_based(cs) ?
|
|
MY_REPERTOIRE_ASCII : MY_REPERTOIRE_UNICODE30;
|
|
}
|
|
// Get string repertoire by the 8-bit flag, for ASCII-based character sets
|
|
my_repertoire_t repertoire() const
|
|
{
|
|
return !m_is_8bit ? MY_REPERTOIRE_ASCII : MY_REPERTOIRE_UNICODE30;
|
|
}
|
|
};
|
|
|
|
|
|
/*
|
|
Used to store identifiers in the client character set.
|
|
Points to a query fragment.
|
|
*/
|
|
struct Lex_ident_cli_st: public Lex_string_with_metadata_st
|
|
{
|
|
public:
|
|
void set_keyword(const char *s, size_t len)
|
|
{
|
|
set(s, len, false, '\0');
|
|
}
|
|
void set_ident(const char *s, size_t len, bool is_8bit)
|
|
{
|
|
set(s, len, is_8bit, '\0');
|
|
}
|
|
void set_ident_quoted(const char *s, size_t len, bool is_8bit, char quote)
|
|
{
|
|
set(s, len, is_8bit, quote);
|
|
}
|
|
void set_unquoted(const LEX_CSTRING *s, bool is_8bit)
|
|
{
|
|
set(s, is_8bit, '\0');
|
|
}
|
|
const char *pos() const { return str - is_quoted(); }
|
|
const char *end() const { return str + length + is_quoted(); }
|
|
};
|
|
|
|
|
|
class Lex_ident_cli: public Lex_ident_cli_st
|
|
{
|
|
public:
|
|
Lex_ident_cli(const LEX_CSTRING *s, bool is_8bit)
|
|
{
|
|
set_unquoted(s, is_8bit);
|
|
}
|
|
Lex_ident_cli(const char *s, size_t len)
|
|
{
|
|
set_ident(s, len, false);
|
|
}
|
|
};
|
|
|
|
#endif // LEX_IDENT_CLI
|