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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
#include "config.h"
#include <assert.h>
#include "drizzled/schema_identifier.h"
#include "drizzled/session.h"
#include "drizzled/current_session.h"
#include "drizzled/internal/my_sys.h"
#include "drizzled/data_home.h"
#include <algorithm>
#include <sstream>
#include <cstdio>
using namespace std;
namespace drizzled
{
extern string drizzle_tmpdir;
extern pid_t current_pid;
static const char hexchars[]= "0123456789abcdef";
static bool tablename_to_filename(const string &from, string &to);
static size_t build_schema_filename(string &path, const string &db)
{
string dbbuff("");
bool conversion_error= false;
conversion_error= tablename_to_filename(db, dbbuff);
if (conversion_error)
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("Schema name cannot be encoded and fit within filesystem "
"name length restrictions."));
return 0;
}
int rootdir_len= strlen(FN_ROOTDIR);
path.append(data_home);
ssize_t without_rootdir= path.length() - rootdir_len;
/* Don't add FN_ROOTDIR if dirzzle_data_home already includes it */
if (without_rootdir >= 0)
{
const char *tmp= path.c_str() + without_rootdir;
if (memcmp(tmp, FN_ROOTDIR, rootdir_len) != 0)
path.append(FN_ROOTDIR);
}
path.append(dbbuff);
return path.length();
}
/*
Translate a table name to a cursor name (WL #1324).
SYNOPSIS
tablename_to_filename()
from The table name
to OUT The cursor name
RETURN
true if errors happen. false on success.
*/
static bool tablename_to_filename(const string &from, string &to)
{
string::const_iterator iter= from.begin();
for (; iter != from.end(); ++iter)
{
if ((*iter >= '0' && *iter <= '9') ||
(*iter >= 'A' && *iter <= 'Z') ||
(*iter >= 'a' && *iter <= 'z') ||
/* OSX defines an extra set of high-bit and multi-byte characters
that cannot be used on the filesystem. Instead of trying to sort
those out, we'll just escape encode all high-bit-set chars on OSX.
It won't really hurt anything - it'll just make some filenames ugly. */
#if !defined(TARGET_OS_OSX)
((unsigned char)*iter >= 128) ||
#endif
(*iter == '_') ||
(*iter == ' ') ||
(*iter == '-'))
{
to.push_back(*iter);
continue;
}
/* We need to escape this char in a way that can be reversed */
to.push_back('@');
to.push_back(hexchars[(*iter >> 4) & 15]);
to.push_back(hexchars[(*iter) & 15]);
}
if (internal::check_if_legal_tablename(to.c_str()))
{
to.append("@@@");
}
return false;
}
SchemaIdentifier::SchemaIdentifier(const std::string &db_arg) :
db(db_arg),
db_path(""),
lower_db(db_arg)
{
std::transform(lower_db.begin(), lower_db.end(),
lower_db.begin(), ::tolower);
if (not lower_db.empty())
{
drizzled::build_schema_filename(db_path, lower_db);
assert(db_path.length()); // TODO throw exception, this is a possibility
}
}
const std::string &SchemaIdentifier::getSQLPath()
{
return getSchemaName();
}
const std::string &SchemaIdentifier::getPath() const
{
return db_path;
}
bool SchemaIdentifier::compare(std::string arg) const
{
std::transform(arg.begin(), arg.end(),
arg.begin(), ::tolower);
return arg == lower_db;
}
bool SchemaIdentifier::isValid() const
{
if (lower_db.empty())
return false;
if (lower_db.size() > NAME_LEN)
return false;
if (lower_db.at(lower_db.length() -1) == ' ')
return false;
const CHARSET_INFO * const cs= &my_charset_utf8mb4_general_ci;
int well_formed_error;
uint32_t res= cs->cset->well_formed_len(cs, lower_db.c_str(), lower_db.c_str() + lower_db.length(),
NAME_CHAR_LEN, &well_formed_error);
if (well_formed_error)
{
my_error(ER_INVALID_CHARACTER_STRING, MYF(0), "identifier", lower_db.c_str());
return false;
}
if (lower_db.length() != res)
return false;
return true;
}
} /* namespace drizzled */
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