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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file hash_policy.hpp
* Contains hash-related policies.
*/
#ifndef PB_DS_HASH_POLICY_HPP
#define PB_DS_HASH_POLICY_HPP
#include
#include
#include
#include
#include
#include
#include
#include
#include
namespace __gnu_pbds
{
#define PB_DS_CLASS_T_DEC template
#define PB_DS_CLASS_C_DEC linear_probe_fn
/// A probe sequence policy using fixed increments.
template
class linear_probe_fn
{
public:
typedef Size_Type size_type;
void
swap(PB_DS_CLASS_C_DEC& other);
protected:
/// Returns the i-th offset from the hash value.
inline size_type
operator()(size_type i) const;
};
#include
#undef PB_DS_CLASS_T_DEC
#undef PB_DS_CLASS_C_DEC
#define PB_DS_CLASS_T_DEC template
#define PB_DS_CLASS_C_DEC quadratic_probe_fn
/// A probe sequence policy using square increments.
template
class quadratic_probe_fn
{
public:
typedef Size_Type size_type;
void
swap(PB_DS_CLASS_C_DEC& other);
protected:
/// Returns the i-th offset from the hash value.
inline size_type
operator()(size_type i) const;
};
#include
#undef PB_DS_CLASS_T_DEC
#undef PB_DS_CLASS_C_DEC
#define PB_DS_CLASS_T_DEC template
#define PB_DS_CLASS_C_DEC direct_mask_range_hashing
/// A mask range-hashing class (uses a bitmask).
template
class direct_mask_range_hashing
: public detail::mask_based_range_hashing
{
private:
typedef detail::mask_based_range_hashing mask_based_base;
public:
typedef Size_Type size_type;
void
swap(PB_DS_CLASS_C_DEC& other);
protected:
void
notify_resized(size_type size);
/// Transforms the __hash value hash into a ranged-hash value
/// (using a bit-mask).
inline size_type
operator()(size_type