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// namespacestring-inl.h
/**
* Copyright (C) 2013 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
namespace mongo {
inline StringData NamespaceString::db() const {
return _dotIndex == std::string::npos ? StringData() : StringData(_ns.c_str(), _dotIndex);
}
inline StringData NamespaceString::coll() const {
return _dotIndex == std::string::npos ? StringData() : StringData(_ns.c_str() + _dotIndex + 1,
_ns.size() - 1 - _dotIndex);
}
inline bool NamespaceString::normal(StringData ns) {
return !virtualized(ns);
}
inline bool NamespaceString::oplog(StringData ns) {
return ns.startsWith("local.oplog.");
}
inline bool NamespaceString::special(StringData ns) {
return !normal(ns) || ns.substr(ns.find('.')).startsWith(".system.");
}
inline bool NamespaceString::virtualized(StringData ns) {
return ns.find('$') != std::string::npos && ns != "local.oplog.$main";
}
inline bool NamespaceString::validDBName(StringData db, DollarInDbNameBehavior behavior) {
if (db.size() == 0 || db.size() >= 64)
return false;
for (StringData::const_iterator iter = db.begin(), end = db.end(); iter != end; ++iter) {
switch (*iter) {
case '\0':
case '/':
case '\\':
case '.':
case ' ':
case '"':
return false;
case '$':
if (behavior == DollarInDbNameBehavior::Disallow)
return false;
continue;
#ifdef _WIN32
// We prohibit all FAT32-disallowed characters on Windows
case '*':
case '<':
case '>':
case ':':
case '|':
case '?':
return false;
#endif
default:
continue;
}
}
return true;
}
inline bool NamespaceString::validCollectionComponent(StringData ns) {
size_t idx = ns.find('.');
if (idx == std::string::npos)
return false;
return validCollectionName(ns.substr(idx + 1)) || oplog(ns);
}
inline bool NamespaceString::validCollectionName(StringData coll) {
if (coll.empty())
return false;
if (coll[0] == '.')
return false;
for (StringData::const_iterator iter = coll.begin(), end = coll.end(); iter != end; ++iter) {
switch (*iter) {
case '\0':
case '$':
return false;
default:
continue;
}
}
return true;
}
inline NamespaceString::NamespaceString() : _ns(), _dotIndex(0) {}
inline NamespaceString::NamespaceString(StringData nsIn) {
_ns = nsIn.toString(); // copy to our buffer
_dotIndex = _ns.find('.');
}
inline NamespaceString::NamespaceString(StringData dbName, StringData collectionName)
: _ns(dbName.size() + collectionName.size() + 1, '\0') {
uassert(17235,
"'.' is an invalid character in a database name",
dbName.find('.') == std::string::npos);
uassert(17246,
"Collection names cannot start with '.'",
collectionName.empty() || collectionName[0] != '.');
std::string::iterator it = std::copy(dbName.begin(), dbName.end(), _ns.begin());
*it = '.';
++it;
it = std::copy(collectionName.begin(), collectionName.end(), it);
_dotIndex = dbName.size();
dassert(it == _ns.end());
dassert(_ns[_dotIndex] == '.');
uassert(17295,
"namespaces cannot have embedded null characters",
_ns.find('\0') == std::string::npos);
}
inline int nsDBHash(const std::string& ns) {
int hash = 7;
for (size_t i = 0; i < ns.size(); i++) {
if (ns[i] == '.')
break;
hash += 11 * (ns[i]);
hash *= 3;
}
return hash;
}
inline std::string NamespaceString::getSisterNS(StringData local) const {
verify(local.size() && local[0] != '.');
return db().toString() + "." + local.toString();
}
inline std::string NamespaceString::getSystemIndexesCollection() const {
return db().toString() + ".system.indexes";
}
inline std::string NamespaceString::getCommandNS() const {
return db().toString() + ".$cmd";
}
} // namespace mongo
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