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/*
Copyright (c) 2018, 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
struct Compare_strncmp
{
int operator()(const LEX_CSTRING& a, const LEX_CSTRING& b) const
{
return strncmp(a.str, b.str, a.length);
}
static CHARSET_INFO* charset()
{
return system_charset_info;
}
};
template <CHARSET_INFO* &CS= system_charset_info>
struct Compare_my_strcasecmp
{
int operator()(const LEX_CSTRING& a, const LEX_CSTRING& b) const
{
DBUG_ASSERT(a.str[a.length] == 0 && b.str[b.length] == 0);
return my_strcasecmp(CS, a.str, b.str);
}
static CHARSET_INFO* charset()
{
return CS;
}
};
typedef Compare_my_strcasecmp<files_charset_info> Compare_fs;
typedef Compare_my_strcasecmp<table_alias_charset> Compare_t;
template <class Storage= LEX_CSTRING>
struct LEX_STRING_u : public Storage
{
LEX_STRING_u()
{
Storage::str= NULL;
Storage::length= 0;
}
LEX_STRING_u(const char *_str, size_t _len, CHARSET_INFO *)
{
Storage::str= _str;
Storage::length= _len;
}
uint32 length() const
{
return (uint32)Storage::length;
}
const char *ptr() const
{
return Storage::str;
}
void set(const char *_str, size_t _len, CHARSET_INFO *)
{
Storage::str= _str;
Storage::length= _len;
}
const LEX_CSTRING& lex_cstring() const
{
return *this;
}
const LEX_STRING& lex_string() const
{
return *(LEX_STRING *)this;
}
};
template <class Compare= Compare_strncmp, class Storage= LEX_STRING_u<> >
struct XString : public Storage
{
public:
XString() {}
XString(const char *_str, size_t _len) :
Storage(_str, _len, Compare::charset())
{
}
XString(const LEX_STRING src) :
Storage(src.str, src.length, Compare::charset())
{
}
XString(const LEX_CSTRING src) :
Storage(src.str, src.length, Compare::charset())
{
}
XString(const char *_str) :
Storage(_str, strlen(_str), Compare::charset())
{
}
bool operator== (const XString& b) const
{
return Storage::length() == b.length() && 0 == Compare()(this->lex_cstring(), b.lex_cstring());
}
bool operator!= (const XString& b) const
{
return !(*this == b);
}
operator const char* () const
{
return Storage::ptr();
}
operator LEX_CSTRING& () const
{
return this->lex_cstring();
}
operator LEX_STRING () const
{
LEX_STRING res;
res.str= const_cast<char *>(this->ptr());
res.length= this->length();
return res;
}
operator bool () const
{
return Storage::ptr() != NULL;
}
};
typedef XString<> LString;
typedef XString<Compare_fs> LString_fs;
typedef XString<Compare_my_strcasecmp<> > LString_i;
typedef XString<Compare_strncmp, String> SString;
typedef XString<Compare_fs, String> SString_fs;
typedef XString<Compare_t, String> SString_t;
#define XSTRING_WITH_LEN(X) (X).ptr(), (X).length()
#define DB_WITH_LEN(X) (X).db.str, (X).db.length
#define TABLE_NAME_WITH_LEN(X) (X).table_name.str, (X).table_name.length
#endif // VERS_STRING_INCLUDED
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