HashableActionList.h [plain text]
#pragma once
#include <wtf/Hasher.h>
#include <wtf/Vector.h>
namespace WebCore {
namespace ContentExtensions {
struct HashableActionList {
enum DeletedValueTag { DeletedValue };
explicit HashableActionList(DeletedValueTag) { state = Deleted; }
enum EmptyValueTag { EmptyValue };
explicit HashableActionList(EmptyValueTag) { state = Empty; }
template<typename AnyVectorType>
explicit HashableActionList(const AnyVectorType& otherActions)
: actions(otherActions)
, state(Valid)
{
std::sort(actions.begin(), actions.end());
StringHasher hasher;
hasher.addCharactersAssumingAligned(reinterpret_cast<const UChar*>(actions.data()), actions.size() * sizeof(uint64_t) / sizeof(UChar));
hash = hasher.hash();
}
bool isEmptyValue() const { return state == Empty; }
bool isDeletedValue() const { return state == Deleted; }
bool operator==(const HashableActionList other) const
{
return state == other.state && actions == other.actions;
}
bool operator!=(const HashableActionList other) const
{
return !(*this == other);
}
Vector<uint64_t> actions;
unsigned hash;
enum {
Valid,
Empty,
Deleted
} state;
};
struct HashableActionListHash {
static unsigned hash(const HashableActionList& actionKey)
{
return actionKey.hash;
}
static bool equal(const HashableActionList& a, const HashableActionList& b)
{
return a == b;
}
static const bool safeToCompareToEmptyOrDeleted = false;
};
struct HashableActionListHashTraits : public WTF::CustomHashTraits<HashableActionList> {
static const bool emptyValueIsZero = false;
};
} }