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engines/bagel/hodjnpodj/garfunkle/note.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "bagel/hodjnpodj/hnplibs/stdafx.h"
+#include "bagel/hodjnpodj/garfunkle/note.h"
+
+namespace Bagel {
+namespace HodjNPodj {
+namespace Garkfunkle {
+
+CNote   *CNote::m_pNoteHead = nullptr;            // pointer to list of linked notes
+CNote   *CNote::m_pNoteTail = nullptr;            // pointer to tail of list of linked notes
+
+IMPLEMENT_DYNCREATE(CNote, CObject)
+
+/*************************************************************************
+ *
+ * CNote()
+ *
+ * Parameters:      none
+ *
+ * Return Value:    none
+ *
+ * Description:     Constructor for note class.
+ *
+ ************************************************************************/
+
+CNote::CNote() {
+	m_nValue = 1;
+	m_pNext = nullptr;                                     // it is not yet in the sprite chain and
+	m_pPrev = nullptr;                                     // ... thus has no links to other sprites
+}
+
+
+/*************************************************************************
+ *
+ * ~CNote()
+ *
+ * Parameters:      none
+ *
+ * Return Value:    none
+ *
+ * Description:     Destructor for note class.
+ *
+ ************************************************************************/
+
+CNote::~CNote() {
+}
+
+
+/*************************************************************************
+ *
+ * SetValue()
+ *
+ * Parameters:
+ *  int nValue      value which identifies the button associated with the note
+ *
+ * Return Value:    none
+ *
+ * Description:     Identify the button to be played at this point in the sequence
+ *
+ ************************************************************************/
+
+void CNote::SetValue(int nValue) {
+	m_nValue = nValue;                  // identify the button to be played
+}
+
+/*************************************************************************
+ *
+ * LinkNote()
+ *
+ * Parameters:      none
+ *
+ * Return Value:    none
+ *
+ * Description:     Link this note into the list by placing it at the
+ *                  the tail of the list
+ *
+ ************************************************************************/
+
+void CNote::LinkNote() {
+	m_pNext = nullptr;                 // link note onto tail of list
+	m_pPrev = m_pNoteTail;          //... by pointing it back at the current
+	//... tail, making it the tail, and
+	if (m_pNoteTail)                //... pointing it at nullptr (the list terminator)
+		(*m_pNoteTail).m_pNext = this;
+	else
+		m_pNoteHead = this;
+	m_pNoteTail = this;
+}
+
+/*************************************************************************
+ *
+ * UnLinkNote()
+ *
+ * Parameters:      none
+ *
+ * Return Value:    none
+ *
+ * Description:     Remove this sprite from the sprite chain and point its
+ *                  neighbors at each other to fill the gap
+ *
+ ************************************************************************/
+
+void CNote::UnLinkNote() {
+	if (m_pPrev)                            // disconnect us from the note chain
+		(*m_pPrev).m_pNext = m_pNext;       // ... by pointing the one before us, and
+	else                                    // ... the one after us, at each other
+		m_pNoteHead = m_pNext;              // special case the instances where the
+	// ... note to be removed is the first
+	if (m_pNext)                            // ...  or the last in the list, update
+		(*m_pNext).m_pPrev = m_pPrev;       // ... the head of chain pointer
+	else
+		m_pNoteTail = m_pPrev;
+
+	m_pNext = m_pPrev = nullptr;
+}
+
+/*************************************************************************
+ *
+ * FlushNoteList()
+ *
+ * Parameters:      none
+ *
+ * Return Value:    none
+ *
+ * Description:     Remove all notes from the chain and delete them via
+ *                  the standard destructor
+ *
+ ************************************************************************/
+
+void CNote::FlushNoteList() {
+	CNote   *pNote;
+
+	while ((pNote = CNote::GetNoteHead())) {
+		(*pNote).UnLinkNote();
+		delete pNote;
+	}
+}
+
+} // namespace Garfunkle
+} // namespace HodjNPodj
+} // namespace Bagel