Begin refactoring of page class

pagebase.cpp

@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2020 Gavin MacGregor
+ *
+ * This file is part of QTeletextMaker.
+ *
+ * QTeletextMaker 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.
+ *
+ * QTeletextMaker 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 QTeletextMaker.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <QByteArray>
+
+#include "pagebase.h"
+
+PageBase::PageBase()
+{
+	m_pageFunction = PFLOP;
+	m_packetCoding = PC7bit;
+	// We use nullptrs to keep track of allocated packets, so initialise them this way
+	for (int i=0; i<89; i++)
+		m_packets[i] = nullptr;
+}
+
+PageBase::~PageBase()
+{
+	for (int i=0; i<89; i++)
+		if (m_packets[i] != nullptr)
+			delete m_packets[i];
+}
+
+bool PageBase::setPacket(int packetNumber, QByteArray packetContents)
+{
+	// X/26 and above need a designation code
+	if (packetNumber >= 26)
+		return false;
+
+	return setPacket(packetNumber, 0, packetContents);
+}
+
+bool PageBase::setPacket(int packetNumber, int designationCode, QByteArray packetContents)
+{
+	if (packetNumber >= 30)
+		return false;
+
+	int packetArrayNumber = packetNumber;
+	if (packetNumber >= 26)
+		packetArrayNumber += (packetNumber - 26) * 16;
+	if (m_packets[packetArrayNumber] == nullptr)
+		m_packets[packetArrayNumber] = new QByteArray;
+	*m_packets[packetArrayNumber] = packetContents;
+
+	return true;
+}
+
+PageBase::PacketCodingEnum PageBase::packetCoding(int packetNumber, int designationCode) const
+{
+	switch (packetNumber) {
+		case 26:
+		case 28:
+			return PC18bit;
+		case 27:
+			return PC4bit;
+		default:
+			return m_packetCoding;
+	}
+}
+
+bool PageBase::setPageFunction(PageBase::PageFunctionEnum newPageFunction)
+{
+	m_pageFunction = newPageFunction;
+	return true;
+}
+
+bool PageBase::setPacketCoding(PageBase::PacketCodingEnum newPacketEncoding)
+{
+	m_packetCoding = newPacketEncoding;
+	return true;
+}