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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 18:07:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-04 18:07:14 +0000
commita175314c3e5827eb193872241446f2f8f5c9d33c (patch)
treecd3d60ca99ae00829c52a6ca79150a5b6e62528b /sql/vers_string.h
parentInitial commit. (diff)
downloadmariadb-10.5-a175314c3e5827eb193872241446f2f8f5c9d33c.tar.xz
mariadb-10.5-a175314c3e5827eb193872241446f2f8f5c9d33c.zip
Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sql/vers_string.h')
-rw-r--r--sql/vers_string.h82
1 files changed, 82 insertions, 0 deletions
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+/*
+ 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[a.length] == 0);
+ DBUG_ASSERT(b.str[b.length] == 0);
+ return my_strcasecmp(system_charset_info, a.str, b.str);
+ }
+};
+
+
+template <class Compare>
+struct Lex_cstring_with_compare : public Lex_cstring
+{
+public:
+ Lex_cstring_with_compare() {}
+ Lex_cstring_with_compare(const char *_str, size_t _len) :
+ Lex_cstring(_str, _len)
+ { }
+ Lex_cstring_with_compare(const LEX_STRING src) :
+ Lex_cstring(src.str, src.length)
+ { }
+ Lex_cstring_with_compare(const LEX_CSTRING src) : Lex_cstring(src.str, src.length)
+ { }
+ 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<Compare_identifiers> Lex_ident;
+typedef Lex_cstring_with_compare<Compare_table_names> Lex_table_name;
+
+#endif // VERS_STRING_INCLUDED