/* Copyright (c) 2018, 2020, 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 02110-1301 USA */ #ifndef VERS_STRING_INCLUDED #define VERS_STRING_INCLUDED #include "lex_string.h" /* LEX_CSTRING with comparison semantics. */ // db and table names: case sensitive (or insensitive) in table_alias_charset struct Compare_table_names { int operator()(const LEX_CSTRING& a, const LEX_CSTRING& b) const { DBUG_ASSERT(a.str[a.length] == 0); DBUG_ASSERT(b.str[b.length] == 0); return table_alias_charset->strnncoll(a.str, a.length, b.str, b.length); } }; // column names and other identifiers: case insensitive in system_charset_info struct Compare_identifiers { int operator()(const LEX_CSTRING& a, const LEX_CSTRING& b) const { DBUG_ASSERT(a.str != NULL); DBUG_ASSERT(b.str != NULL); DBUG_ASSERT(a.str[a.length] == 0); DBUG_ASSERT(b.str[b.length] == 0); return my_strcasecmp(system_charset_info, a.str, b.str); } }; template struct Lex_cstring_with_compare : public Lex_cstring { public: Lex_cstring_with_compare() = default; Lex_cstring_with_compare(const char *_str, size_t _len) : Lex_cstring(_str, _len) { } Lex_cstring_with_compare(const LEX_CSTRING src) : Lex_cstring(src.str, src.length) { } explicit Lex_cstring_with_compare(const char *_str) : Lex_cstring(_str, strlen(_str)) { } bool streq(const Lex_cstring_with_compare& b) const { return Lex_cstring::length == b.length && 0 == Compare()(*this, b); } operator const char* () const { return str; } operator bool () const { return str != NULL; } }; typedef Lex_cstring_with_compare Lex_ident; typedef Lex_cstring_with_compare Lex_table_name; #endif // VERS_STRING_INCLUDED