mirror of https://github.com/pyrollo/vinace.git
73 lines
1.7 KiB
C++
73 lines
1.7 KiB
C++
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* Vinace
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* Copyright (C) P.Y. Rollo 2009 <dev@pyrollo.com>
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*
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* Vinace is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Vinace is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "c-observable.hpp"
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CObservable::CObservable() {
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observers = 0;
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}
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CObservable::~CObservable() {
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observerChain *entry = observers;
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observerChain *nextentry;
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while (entry) {
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nextentry = entry->next;
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delete entry;
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entry = nextentry;
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}
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}
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void CObservable::subscribe(CObserver *obs) {
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observerChain *entry = new observerChain;
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// Add observer to the chained list
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entry->next = observers;
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entry->obs = obs;
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observers = entry;
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}
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void CObservable::unsubscribe(CObserver *obs) {
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observerChain *entry = observers;
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observerChain *lastentry = 0;
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while (entry) {
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if (entry->obs==obs)
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if (lastentry) {
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lastentry->next = entry->next;
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delete entry;
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entry = lastentry->next;
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} else {
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observers = entry->next;
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delete entry;
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entry = observers;
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}
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else
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entry = entry->next;
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}
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}
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void CObservable::notifyUpdate() {
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observerChain *entry = observers;
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while (entry) {
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entry->obs->notify(this);
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entry = entry->next;
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}
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}
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