mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-03 21:12:28 +00:00
b79ead9c84
* Replicate poco into base/poco/ * De-register poco submodule * Build poco from ClickHouse * Exclude poco from stylecheck * Exclude poco from whitespace check * Exclude poco from typo check * Remove x bit from sources/headers (the style check complained) * Exclude poco from duplicate include check * Fix fasttest * Remove contrib/poco-cmake/* * Simplify poco build descriptions * Remove poco stuff not used by ClickHouse * Glob poco sources * Exclude poco from clang-tidy
133 lines
2.2 KiB
C++
133 lines
2.2 KiB
C++
//
|
|
// NamePool.cpp
|
|
//
|
|
// Library: XML
|
|
// Package: XML
|
|
// Module: NamePool
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#include "Poco/XML/NamePool.h"
|
|
#include "Poco/Exception.h"
|
|
#include "Poco/Random.h"
|
|
|
|
|
|
namespace Poco {
|
|
namespace XML {
|
|
|
|
|
|
class NamePoolItem
|
|
{
|
|
public:
|
|
NamePoolItem(): _used(false)
|
|
{
|
|
}
|
|
|
|
~NamePoolItem()
|
|
{
|
|
}
|
|
|
|
bool set(const XMLString& qname, const XMLString& namespaceURI, const XMLString& localName)
|
|
{
|
|
if (!_used)
|
|
{
|
|
_name.assign(qname, namespaceURI, localName);
|
|
_used = true;
|
|
return true;
|
|
}
|
|
else return _name.equals(qname, namespaceURI, localName);
|
|
}
|
|
|
|
const Name& get() const
|
|
{
|
|
return _name;
|
|
}
|
|
|
|
bool used() const
|
|
{
|
|
return _used;
|
|
}
|
|
|
|
private:
|
|
Name _name;
|
|
bool _used;
|
|
};
|
|
|
|
|
|
NamePool::NamePool(unsigned long size):
|
|
_size(size),
|
|
_salt(0),
|
|
_rc(1)
|
|
{
|
|
poco_assert (size > 1);
|
|
|
|
_pItems = new NamePoolItem[size];
|
|
|
|
Poco::Random rnd;
|
|
rnd.seed();
|
|
_salt = rnd.next();
|
|
}
|
|
|
|
|
|
NamePool::~NamePool()
|
|
{
|
|
delete [] _pItems;
|
|
}
|
|
|
|
|
|
void NamePool::duplicate()
|
|
{
|
|
++_rc;
|
|
}
|
|
|
|
|
|
void NamePool::release()
|
|
{
|
|
if (--_rc == 0)
|
|
delete this;
|
|
}
|
|
|
|
|
|
const Name& NamePool::insert(const XMLString& qname, const XMLString& namespaceURI, const XMLString& localName)
|
|
{
|
|
unsigned long i = 0;
|
|
unsigned long n = (hash(qname, namespaceURI, localName) ^ _salt) % _size;
|
|
|
|
while (!_pItems[n].set(qname, namespaceURI, localName) && i++ < _size)
|
|
n = (n + 1) % _size;
|
|
|
|
if (i > _size) throw Poco::PoolOverflowException("XML name pool");
|
|
|
|
return _pItems[n].get();
|
|
}
|
|
|
|
|
|
const Name& NamePool::insert(const Name& name)
|
|
{
|
|
return insert(name.qname(), name.namespaceURI(), name.localName());
|
|
}
|
|
|
|
|
|
unsigned long NamePool::hash(const XMLString& qname, const XMLString& namespaceURI, const XMLString& localName)
|
|
{
|
|
unsigned long h = 0;
|
|
XMLString::const_iterator it = qname.begin();
|
|
XMLString::const_iterator end = qname.end();
|
|
while (it != end) h = (h << 5) + h + (unsigned long) *it++;
|
|
it = namespaceURI.begin();
|
|
end = namespaceURI.end();
|
|
while (it != end) h = (h << 5) + h + (unsigned long) *it++;
|
|
it = localName.begin();
|
|
end = localName.end();
|
|
while (it != end) h = (h << 5) + h + (unsigned long) *it++;
|
|
return h;
|
|
}
|
|
|
|
|
|
} } // namespace Poco::XML
|