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engines/ultima/ultima8/usecode/byte_set.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 "ultima/ultima8/misc/debugger.h"
+#include "ultima/ultima8/usecode/byte_set.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+ByteSet::ByteSet() : _size(0), _data(nullptr) {
+}
+
+
+ByteSet::ByteSet(unsigned int size) : _data(nullptr) {
+	setSize(size);
+}
+
+ByteSet::~ByteSet() {
+	delete[] _data;
+}
+
+void ByteSet::setSize(unsigned int size) {
+	if (_data) delete[] _data;
+
+	_size = size;
+	_data = new uint8[_size];
+	for (unsigned int i = 0; i < _size; ++i)
+		_data[i] = 0;
+}
+
+uint32 ByteSet::getEntries(unsigned int pos, unsigned int n) const {
+	assert(n <= 2);
+	assert(pos + n <= _size);
+	if (n == 0) return 0;
+
+	if (n == 1) {
+		return _data[pos];
+	} else if (n == 2) {
+		return (_data[pos] << 8) | _data[pos + 1];
+	}
+	return 0;
+}
+
+void ByteSet::setEntries(unsigned int pos, unsigned int n, uint32 val) {
+	assert(n <= 2);
+	assert(pos + n <= _size);
+	if (n == 0) return;
+
+	if (n == 1) {
+		_data[pos] = static_cast<uint8>(val);
+	} else if (n == 2) {
+		_data[pos] = static_cast<uint8>((val & 0xFF00) >> 8);
+		_data[pos + 1] = static_cast<uint8>(val & 0xFF);
+	}
+}
+
+void ByteSet::save(Common::WriteStream *ws) {
+	ws->writeUint32LE(_size);
+	ws->write(_data, _size);
+}
+
+bool ByteSet::load(Common::ReadStream *rs, uint32 version) {
+	uint32 s = rs->readUint32LE();
+
+	if (s > 1024 * 1024) {
+		warning("Improbable globals size %d, corrupt save?", s);
+		return false;
+	}
+
+	setSize(s);
+	rs->read(_data, _size);
+
+	return true;
+}
+
+} // End of namespace Ultima8
+} // End of namespace Ultima