implement high level abstraction for android's file

engine/core/filesystem/AssetFile.cpp

@@ -0,0 +1,150 @@
+/*
+Copyright (c) 2013 Daniele Bartolini, Michele Rossi
+Copyright (c) 2012 Daniele Bartolini, Simone Boscaratto
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "AssetFile.h"
+
+namespace crown
+{
+
+//-----------------------------------------------------------------------------
+AssetFile::AssetFile(const char* path) :
+	File(FOM_READ),
+	m_file(path, FOM_READ),
+	m_last_was_read(true)
+{
+
+}
+
+//-----------------------------------------------------------------------------
+void AssetFile::seek(size_t position)
+{
+	check_valid();
+
+	m_file.seek(position);
+}
+
+//-----------------------------------------------------------------------------
+void AssetFile::seek_to_end()
+{
+	check_valid();
+
+	m_file.seek_to_end();
+}
+
+//-----------------------------------------------------------------------------
+void AssetFile::skip(size_t bytes)
+{
+	check_valid();
+
+	m_file.skip(bytes);
+}
+
+//-----------------------------------------------------------------------------
+void AssetFile::read(void* buffer, size_t size)
+{
+	check_valid();
+
+	if (!m_last_was_read)
+	{
+		m_last_was_read = true;
+		m_file.seek(0);
+	}
+
+	size_t bytes_read = m_file.read(buffer, size);
+	CE_ASSERT(bytes_read == size, "Failed to read from file");
+}
+
+//-----------------------------------------------------------------------------
+void AssetFile::write(const void* buffer, size_t size)
+{
+	// Not needed
+}
+
+//-----------------------------------------------------------------------------
+bool AssetFile::copy_to(File& file, size_t size = 0)
+{
+	// Not needed
+}
+
+//-----------------------------------------------------------------------------
+void AssetFile::flush()
+{
+	// Not needed
+}
+
+//-----------------------------------------------------------------------------
+bool AssetFile::is_valid() const
+{
+	return m_file.is_open();
+}
+
+//-----------------------------------------------------------------------------
+bool AssetFile::end_of_file() const
+{
+	return position() == size();
+}
+
+//-----------------------------------------------------------------------------
+size_t AssetFile::size() const
+{
+	check_valid();
+
+	return m_file.size();
+}
+
+//-----------------------------------------------------------------------------
+size_t AssetFile::position() const
+{
+	check_valid();
+
+	return m_file.position();
+}
+
+//-----------------------------------------------------------------------------
+bool AssetFile::can_read() const
+{
+	check_valid();
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+bool AssetFile::can_write() const
+{
+	check_valid();
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+bool AssetFile::can_seek() const
+{
+	check_valid();
+
+	return true;
+}
+
+} // namespace crown

engine/core/filesystem/AssetFile.h

@@ -0,0 +1,82 @@
+/*
+Copyright (c) 2013 Daniele Bartolini, Michele Rossi
+Copyright (c) 2012 Daniele Bartolini, Simone Boscaratto
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#pragma once
+
+#include "APKFile.h"
+
+namespace crown
+{
+
+class AssetFile : public File 
+{
+public:
+
+				AssetFile(const char* path);
+
+	void		seek(size_t position);
+
+	void		seek_to_end();
+
+	void		skip(size_t bytes);
+
+	void		read(void* buffer, size_t size);
+
+	void		write(const void* buffer, size_t size);
+
+	bool		copy_to(File& file, size_t size = 0);
+
+	void		flush();
+
+	bool		is_valid() const;
+
+	bool		end_of_file() const;
+
+	size_t		size() const;
+
+	size_t		position() const;
+
+	bool		can_read() const;
+
+	bool		can_write() const;
+
+	bool		can_seek() const;
+
+private:
+
+	APKFile*	m_file;
+
+	bool		m_last_was_read;
+
+private:
+
+	inline void		check_valid() const
+	{
+		CE_ASSERT(m_file.is_open(), "File is not open");
+	}
+};
+
+} // namespace crown