Generic hash function object supporting multiple types. More...

#include <hash.h>

Collaboration diagram for original::hash< TYPE >:

Public Member Functions
u_integer	operator() (const TYPE &t) const noexcept
	Hash function object call operator.

template<typename T >
original::u_integer	hashFuncImpl (const T &t) noexcept

template<typename T >
original::u_integer	hashFunc (const T &t) noexcept

template<typename T >
original::u_integer	hashFunc (T *const &t) noexcept

Static Public Member Functions
template<typename T >
static void	hashCombine (u_integer &seed, const T &value) noexcept
	Combines a hash value with another value's hash.

static u_integer	fnv1a (const byte *data, u_integer size) noexcept
	FNV-1a hash implementation for raw byte data.

template<typename T , typename... Rest>
static void	hashCombine (u_integer &seed, const T &value, const Rest &... rest) noexcept
	Combines multiple hash values into one.

template<typename T >
static u_integer	hashFunc (const T &t) noexcept
	Default hash function fallback.

template<HashTraits T>
static u_integer	hashFunc (const T &t) noexcept
	Hash function for types implementing HashTraits concept.

template<std::integral T>
static u_integer	hashFunc (const T &t) noexcept
	Hash function specialization for integral types.

template<typename T >
static u_integer	hashFunc (T *const &t) noexcept
	Hash function for pointers.

static u_integer	hashFunc (const std::nullptr_t &null) noexcept
	Hash function for nullptr.

static u_integer	hashFunc (const char &t) noexcept
	Hash function for single character.

static u_integer	hashFunc (const char *str) noexcept
	Hash function for C-style strings.

static u_integer	hashFunc (const std::string &str) noexcept
	Hash function for std::string.

Static Public Attributes
static constexpr u_integer	FNV_OFFSET_BASIS = 0x811C9DC5
	FNV-1a initial offset value (0x811C9DC5)

static constexpr u_integer	FNV_32_PRIME = 0x01000193
	FNV-1a prime multiplier (0x01000193)

Friends
template<typename >
class	hashable

Detailed Description

template<typename TYPE>
class original::hash< TYPE >

Generic hash function object supporting multiple types.

Template Parameters

TYPE	The type for which the hash function object is defined

Provides:

FNV-1a hash algorithm implementation
Specialized hash functions for common types
Fallback implementations for arbitrary types
Consistent hashing interface via operator()

Supported Types:

Integral types (direct casting)
Pointers (address-based hashing)
Strings (FNV-1a over characters)
Trivially copyable types (byte-wise hashing)
Types implementing hashable interface (HashTraits concept)

Example Usage:

original::hash<std::string> hasher;

u_integer h = hasher("hello world");

original::ownerPtr

Unique ownership smart pointer with move semantics.

Definition ownerPtr.h:37

original::u_integer

std::uint32_t u_integer

32-bit unsigned integer type for sizes and indexes

Definition config.h:263

Member Function Documentation

◆ fnv1a()

template<typename TYPE >

original::u_integer original::hash< TYPE >::fnv1a	(	const byte *	data,
		u_integer	size
	)

staticnoexcept

FNV-1a hash implementation for raw byte data.

Parameters

data	Pointer to byte array
size	Number of bytes to hash

Returns: Computed hash value

Note: This is the fundamental hashing operation used by other specializations

◆ hashCombine() [1/2]

template<typename TYPE >

template<typename T >

void original::hash< TYPE >::hashCombine	(	u_integer &	seed,
		const T &	value
	)

staticnoexcept

Combines a hash value with another value's hash.

Template Parameters

T	Type of the value to combine

Parameters

seed	Current hash value (modified in-place)
value	Value whose hash to combine

◆ hashCombine() [2/2]

template<typename TYPE >

template<typename T , typename... Rest>

void original::hash< TYPE >::hashCombine	(	u_integer &	seed,
		const T &	value,
		const Rest &...	rest
	)

staticnoexcept

Combines multiple hash values into one.

Template Parameters

T	First value type
Rest	Remaining value types

Parameters

seed	Current hash value (modified in-place)
value	First value to combine
rest	Remaining values to combine

◆ hashFunc() [1/8]

template<typename TYPE >

original::u_integer original::hash< TYPE >::hashFunc ( const char & t )

staticnoexcept

Hash function for single character.

Parameters

t	Character to hash

Returns: Integer value of the character

◆ hashFunc() [2/8]

template<typename TYPE >

original::u_integer original::hash< TYPE >::hashFunc ( const char * str )

staticnoexcept

Hash function for C-style strings.

Parameters

str	Null-terminated string

Returns: Computed FNV-1a hash

Note: Handles nullptr by returning 0

◆ hashFunc() [3/8]

template<typename TYPE >

original::u_integer original::hash< TYPE >::hashFunc ( const std::nullptr_t & null )

staticnoexcept

Hash function for nullptr.

Parameters

null	Null pointer

Returns: 0 as the hash value

◆ hashFunc() [4/8]

template<typename TYPE >

original::u_integer original::hash< TYPE >::hashFunc ( const std::string & str )

staticnoexcept

Hash function for std::string.

Parameters

str	String to hash

Returns: Computed FNV-1a hash

◆ hashFunc() [5/8]

template<typename TYPE >

template<typename T >

static u_integer original::hash< TYPE >::hashFunc ( const T & t )

staticnoexcept

Default hash function fallback.

Template Parameters

T	The input type

Parameters

t	The value to be hashed

Returns: Hash value

For trivially copyable types: uses byte-wise FNV-1a For other types: falls back to address hashing

◆ hashFunc() [6/8]

template<typename TYPE >

template<HashTraits T>

static u_integer original::hash< TYPE >::hashFunc ( const T & t )

staticnoexcept

Hash function for types implementing HashTraits concept.

Template Parameters

T	Type that satisfies HashTraits concept

Parameters

t	The object to hash

Returns: Hash value via toHash() method

This specialization is used for types that provide a toHash() method and support equality comparison, regardless of inheritance hierarchy. This includes types inheriting from hashable<T> and standalone types that meet the HashTraits requirements.

See also: HashTraits

◆ hashFunc() [7/8]

template<typename TYPE >

template<std::integral T>

static u_integer original::hash< TYPE >::hashFunc ( const T & t )

staticnoexcept

Hash function specialization for integral types.

Template Parameters

T	Integral type

Parameters

t	The value to hash

Returns: The cast hash value

◆ hashFunc() [8/8]

template<typename TYPE >

template<typename T >

static u_integer original::hash< TYPE >::hashFunc ( T *const & t )

staticnoexcept

Hash function for pointers.

Template Parameters

T	The pointee type

Parameters

t	Pointer to hash

Returns: Hash value based on address

◆ operator()()

template<typename TYPE >

original::u_integer original::hash< TYPE >::operator() ( const TYPE & t ) const

noexcept

Hash function object call operator.

Parameters

t	The object to hash

Returns: Result of hashFunc

Note: Provides consistent interface for use in STL containers

The documentation for this class was generated from the following file:

src/core/hash.h

Public Member Functions

Static Public Member Functions

Static Public Attributes

Friends

Detailed Description

Member Function Documentation

◆ fnv1a()

◆ hashCombine() [1/2]

◆ hashCombine() [2/2]

◆ hashFunc() [1/8]

◆ hashFunc() [2/8]

◆ hashFunc() [3/8]

◆ hashFunc() [4/8]

◆ hashFunc() [5/8]

◆ hashFunc() [6/8]

◆ hashFunc() [7/8]

◆ hashFunc() [8/8]

◆ operator()()