3 * Copyright (C) 2009 Didier Villevalois, Maciej Piechotka
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 * Didier 'Ptitjes' Villevalois <ptitjes@free.fr>
21 * Maciej Piechotka <uzytkownik2@gmail.com>
29 * Helper class for equal, hash and compare functions.
34 * Get a equality testing function for a given type.
36 * @param t the type which to get an equality testing function for.
38 * @return the equality testing function corresponding to the given type.
40 public static EqualFunc get_equal_func_for (Type t) {
41 if (t == typeof (string)) {
49 * Get a hash function for a given type.
51 * @param t the type which to get the hash function for.
53 * @return the hash function corresponding to the given type.
55 public static HashFunc get_hash_func_for (Type t) {
56 if (t == typeof (string)) {
64 * Get a comparator function for a given type.
66 * @param t the type which to get a comparator function for.
68 * @return the comparator function corresponding to the given type.
70 public static CompareFunc get_compare_func_for (Type t) {
71 if (t == typeof (string)) {
72 return (CompareFunc) strcmp;
73 } else if (t.is_a (typeof (Comparable))) {
74 return (CompareFunc) comparable_compare;
76 return (CompareFunc) direct_compare;
81 internal static int comparable_compare (void* a, void* b) {
82 return ((Comparable) a).compare_to ((Comparable) b);
86 * Compares two arbitrary elements together.
88 * The comparison is done on pointers and not on values behind.
90 * @param _val1 the first value to compare.
91 * @param _val2 the second value to compare.
93 * @return a negative value if _val1 is lesser than _val2, a positive value
94 * if _val1 is greater then _val2 and zero if both are equal.
96 public static int direct_compare (void* _val1, void* _val2) {
97 long val1 = (long)_val1, val2 = (long)_val2;
100 } else if (val1 == val2) {