original::hash< TYPE > Class Template Reference

Forward declaration of hash class template. 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
static u_integer	fnv1a (const byte *data, u_integer size) noexcept
	FNV-1a hash implementation for raw byte data.
template<typename T>
static u_integer	hashFunc (const T &t) noexcept
	Default hash function fallback.
template<isHashable T>
static u_integer	hashFunc (const T &t) noexcept
	Hash function for types satisfying the isHashable 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.
static constexpr u_integer	FNV_32_PRIME = 0x01000193
	FNV-1a prime multiplier.

Friends
template<typename>
class	hashable

Detailed Description

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

Forward declaration of hash class template.

Generic hash function object supporting multiple types.

Template Parameters

TYPE	The type for which the hash function object is defined.
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

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

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<isHashable T>

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

staticnoexcept

Hash function for types satisfying the isHashable concept.

Template Parameters

T	A hashable type

Parameters

t	The object to hash

Returns

The hash value from the object's toHash method

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 casted 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