feisty meow concerns codebase  2.140
byte_hasher.h
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1 #ifndef ROTATING_BYTE_HASHER_CLASS
2 #define ROTATING_BYTE_HASHER_CLASS
3 
4 /*****************************************************************************\
5 * *
6 * Name : rotating_byte_hasher *
7 * Author : Chris Koeritz *
8 * *
9 *******************************************************************************
10 * Copyright (c) 2001-$now By Author. This program is free software; you can *
11 * redistribute it and/or modify it under the terms of the GNU General Public *
12 * License as published by the Free Software Foundation; either version 2 of *
13 * the License or (at your option) any later version. This is online at: *
14 * http://www.fsf.org/copyleft/gpl.html *
15 * Please send any updates to: fred@gruntose.com *
16 \*****************************************************************************/
17 
18 #include "byte_hasher.h"
19 #include "checksums.h"
20 #include "hash_table.h"
21 
22 #include <basis/definitions.h>
23 
24 namespace structures {
25 
27 
36 {
37 public:
38  virtual ~rotating_byte_hasher() {}
39 
40  virtual basis::un_int hash(const void *key_data, int key_length) const
41  { return checksums::hash_bytes(key_data, key_length); }
43 
48  virtual hashing_algorithm *clone() const
49  { return new rotating_byte_hasher; }
51 };
52 
53 } //namespace.
54 
55 #endif
56 
static basis::un_int hash_bytes(const void *key_data, int key_length)
returns a value that can be used for indexing into a hash table.
Definition: checksums.cpp:74
A hashing algorithm takes a key and derives a related integer from it.
Definition: hash_table.h:41
Implements a hashing algorithm based on the contents stored in an object.
Definition: byte_hasher.h:36
virtual basis::un_int hash(const void *key_data, int key_length) const
returns a value that can be used for indexing into a hash table.
Definition: byte_hasher.h:40
virtual hashing_algorithm * clone() const
implements cloning of the algorithm object.
Definition: byte_hasher.h:47
Constants and objects used throughout HOOPLE.
unsigned int un_int
Abbreviated name for unsigned integers.
Definition: definitions.h:62
A dynamic container class that holds any kind of object via pointers.
Definition: amorph.h:55