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added random salt to NamePool hash
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a176c8d1f2
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@ -74,6 +74,7 @@ private:
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NamePoolItem* _pItems;
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unsigned long _size;
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unsigned long _salt;
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int _rc;
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};
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@ -16,6 +16,7 @@
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#include "Poco/XML/NamePool.h"
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#include "Poco/Exception.h"
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#include "Poco/Random.h"
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namespace Poco {
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@ -62,11 +63,16 @@ private:
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NamePool::NamePool(unsigned long size):
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_size(size),
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_salt(0),
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_rc(1)
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{
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poco_assert (size > 1);
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_pItems = new NamePoolItem[size];
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Poco::Random rnd;
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rnd.seed();
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_salt = rnd.next();
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}
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@ -92,7 +98,7 @@ void NamePool::release()
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const Name& NamePool::insert(const XMLString& qname, const XMLString& namespaceURI, const XMLString& localName)
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{
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unsigned long i = 0;
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unsigned long n = hash(qname, namespaceURI, localName) % _size;
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unsigned long n = (hash(qname, namespaceURI, localName) ^ _salt) % _size;
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while (!_pItems[n].set(qname, namespaceURI, localName) && i++ < _size)
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n = (n + 1) % _size;
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