1 files changed, 81 insertions, 0 deletions
diff --git a/common/iff_container.cpp b/common/iff_container.cpp
new file mode 100644
index 0000000000..c447d93f12
--- /dev/null
+++ b/common/iff_container.cpp
@@ -0,0 +1,81 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/iff_container.h"
+#include "common/substream.h"
+
+namespace Common {
+
+IFFParser::IFFParser(Common::ReadStream *stream, bool disposeStream) : _stream(stream), _disposeStream(disposeStream) {
+	setInputStream(stream);
+}
+
+IFFParser::~IFFParser() {
+	if (_disposeStream) {
+		delete _stream;
+	}
+	_stream = 0;
+}
+
+void IFFParser::setInputStream(Common::ReadStream *stream) {
+	assert(stream);
+	_formChunk.setInputStream(stream);
+	_chunk.setInputStream(stream);
+
+	_formChunk.readHeader();
+	if (_formChunk.id != ID_FORM) {
+		error("IFFParser input is not a FORM type IFF file");
+	}
+	_formSize = _formChunk.size;
+	_formType = _formChunk.readUint32BE();
+}
+
+void IFFParser::parse(IFFCallback &callback) {
+	bool stop;
+	do {
+		_chunk.feed();
+		_formChunk.incBytesRead(_chunk.size);
+
+		if (_formChunk.hasReadAll()) {
+			break;
+		}
+
+		_formChunk.incBytesRead(8);
+		_chunk.readHeader();
+
+		// invoke the callback
+		Common::SubReadStream stream(&_chunk, _chunk.size);
+		IFFChunk chunk(_chunk.id, _chunk.size, &stream);
+		stop = callback(chunk);
+
+		// eats up all the remaining data in the chunk
+		while (!stream.eos()) {
+			stream.readByte();
+		}
+
+	} while (!stop);
+}
+
+}	// End of namespace Common