gameswf_stream.h

一个开源的Flash 播放器,可以在Windows/Linux 上运行

// gameswf_stream.h	-- Thatcher Ulrich <[e-mail]> 2003

// This source code has been donated to the Public Domain.  Do
// whatever you want with it.

// A class to handle reading the elements of SWF files.


#ifndef GAMESWF_STREAM_H
#define GAMESWF_STREAM_H


#include "base/container.h"
class tu_file;


namespace gameswf
{
	// stream is used to encapsulate bit-packed file reads.
	struct stream
	{
		stream(tu_file* input);
		~stream();

		int	read_uint(int bitcount);
		int	read_sint(int bitcount);
		float	read_fixed();
		void	align();

		Uint8	read_u8();
		Sint8	read_s8();
		Uint16	read_u16();
		Sint16	read_s16();
		Uint32	read_u32();
		Sint32	read_s32();
		int     read_variable_count()
		{
			int count = read_u8();
			if (count == 0xFF)
				count = read_u16();
			return count;
		};

		// For null-terminated string.
		char*	read_string();	// reads *and new[]'s* the string -- ownership passes to caller!

		// For string that begins with an 8-bit length code.
		char*	read_string_with_length();	// reads *and new[]'s* the string -- ownership passes to caller!

		int	get_position();
		void	set_position(int pos);
		int	get_tag_end_position();
		int	open_tag();
		void	close_tag();

		tu_file*	get_underlying_stream() { return m_input; }

	private:
		tu_file*	m_input;
		Uint8	m_current_byte;
		Uint8	m_unused_bits;

		array<int>	m_tag_stack;	// position of end of tag
	};


};	// end namespace gameswf


#endif // GAMESWF_STREAM_H


// Local Variables:
// mode: C++
// c-basic-offset: 8 
// tab-width: 8
// indent-tabs-mode: t
// End: