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csHash Class Template Reference

A generic hash table class, which grows dynamically and whose buckets are unsorted arrays. More...

#include <hash.h>

Inheritance diagram for csHash:

csHashReversible List of all members.

Public Methods

 csHash (int size=257, int grow_rate=64, int max_size=20000)
 Construct a hash table with an array of the given size, which for optimisation reasons should be a prime number. More...

 csHash (const csHash< T > &o)
 Copy constructor. More...

void Put (const K &key, const T &value)
 Add an element to the hash table. More...

csArray< T > GetAll (uint32 key) const
 Get all the elements with the given key, or empty if there are none. More...

void PutFirst (const K &key, const T &value)
 Add an element to the hash table, overwriting if the key already exists. More...

const T & Get (const K &key) const
 Get the first element matching the given key, or 0 if there is none. More...

bool DeleteAll ()
 Delete all the elements, returning false if there are none. More...

bool DeleteAll (const K &key)
 Delete all the elements matching the given key. More...

bool Delete (const K &key, const T &value)
 Delete all the elements matching the given key and value. More...

int GetSize () const
 Get the number of elements in the hash. More...

Iterator GetIterator (const K &key) const
 Return an iterator for the hash, to iterate only over the elements with the given key. More...

GlobalIterator GetIterator () const
 Return an iterator for the hash, to iterate over all elements. More...


Detailed Description

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
class csHash< T, K, KeyHandler >

A generic hash table class, which grows dynamically and whose buckets are unsorted arrays.

Definition at line 61 of file hash.h.


Constructor & Destructor Documentation

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
csHash< T, K, KeyHandler >::csHash int    size = 257,
int    grow_rate = 64,
int    max_size = 20000
[inline]
 

Construct a hash table with an array of the given size, which for optimisation reasons should be a prime number.

Grow_rate is the rate at which the hash table grows: Size doubles once there are size/grow_rate collisions. It will not grow after it reaches max_size.

Here are a few primes: 7, 11, 19, 29, 59, 79, 101, 127, 151, 199, 251, 307, 401, 503, 809, 1009, 1499, 2003, 3001, 5003, 12263, 25247, 36923, 50119, 70951, 90313, 104707. For a bigger list go to http://www.utm.edu/research/primes/

Definition at line 134 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
csHash< T, K, KeyHandler >::csHash const csHash< T > &    o [inline]
 

Copy constructor.

Definition at line 142 of file hash.h.


Member Function Documentation

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
bool csHash< T, K, KeyHandler >::Delete const K &    key,
const T &    value
[inline]
 

Delete all the elements matching the given key and value.

Definition at line 232 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
bool csHash< T, K, KeyHandler >::DeleteAll const K &    key [inline]
 

Delete all the elements matching the given key.

Definition at line 216 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
bool csHash< T, K, KeyHandler >::DeleteAll   [inline]
 

Delete all the elements, returning false if there are none.

Definition at line 201 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
const T& csHash< T, K, KeyHandler >::Get const K &    key const [inline]
 

Get the first element matching the given key, or 0 if there is none.

Definition at line 188 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
csArray<T> csHash< T, K, KeyHandler >::GetAll uint32    key const [inline]
 

Get all the elements with the given key, or empty if there are none.

Definition at line 158 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
GlobalIterator csHash< T, K, KeyHandler >::GetIterator   const [inline]
 

Return an iterator for the hash, to iterate over all elements.

Modifying the hash (except with DeleteNext) while you have open iterators will cause undefined behaviour.

Definition at line 395 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
Iterator csHash< T, K, KeyHandler >::GetIterator const K &    key const [inline]
 

Return an iterator for the hash, to iterate only over the elements with the given key.

Modifying the hash (except with DeleteNext) while you have open iterators will cause undefined behaviour.

Definition at line 385 of file hash.h.

Referenced by csHash< K, T, ReverseKeyHandler >::GetIterator.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
int csHash< T, K, KeyHandler >::GetSize   const [inline]
 

Get the number of elements in the hash.

Definition at line 249 of file hash.h.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
void csHash< T, K, KeyHandler >::Put const K &    key,
const T &    value
[inline]
 

Add an element to the hash table.

Reimplemented in csHashReversible.

Definition at line 147 of file hash.h.

Referenced by csHashReversible< csRef< iRenderLoop >, const char *, StringHashKeyHandler, csRefHashKeyHandler< iRenderLoop > >::Put.

template<class T, class K = uint32, class KeyHandler = csIntegralHashKeyHandler<K>>
void csHash< T, K, KeyHandler >::PutFirst const K &    key,
const T &    value
[inline]
 

Add an element to the hash table, overwriting if the key already exists.

Definition at line 170 of file hash.h.


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