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Hash_i_dh.h
1/*@HEADER
2// ***********************************************************************
3//
4// Ifpack: Object-Oriented Algebraic Preconditioner Package
5// Copyright (2002) Sandia Corporation
6//
7// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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11// modification, are permitted provided that the following conditions are
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40//@HEADER
41*/
42
43/* This is similar to the Hash_i_dh class (woe, for a lack
44 of templates); this this class is for hashing data
45 consisting of single, non-negative integers.
46*/
47
48
49#ifndef HASH_I_DH
50#define HASH_I_DH
51
52#include "euclid_common.h"
53
54
55#ifdef __cplusplus
56extern "C"
57{
58#endif
59
60/*
61 class methods
62 note: all parameters are inputs; the only output
63 is the "int" returned by Hash_i_dhLookup.
64*/
65 extern void Hash_i_dhCreate (Hash_i_dh * h, int size);
66 /* For proper operation, "size," which is the minimal
67 size of the hash table, must be a power of 2.
68 Or, pass "-1" to use the default.
69 */
70
71
72 extern void Hash_i_dhDestroy (Hash_i_dh h);
73 extern void Hash_i_dhReset (Hash_i_dh h);
74
75 extern void Hash_i_dhInsert (Hash_i_dh h, int key, int data);
76 /* throws error if <data, data> is already inserted;
77 grows hash table if out of space.
78 */
79
80 extern int Hash_i_dhLookup (Hash_i_dh h, int key);
81 /* returns "data" associated with "key,"
82 or -1 if "key" is not found.
83 */
84
85#ifdef __cplusplus
86}
87#endif
88#endif