A code segment. More...

#include <action_buffer.h>

Inheritance diagram for gnash::action_buffer:

Public Member Functions
	action_buffer (const movie_definition &md)

void	read (SWFStream &in, unsigned long endPos)
	Read action bytes from input stream up to but not including endPos. More...

size_t	size () const

std::uint8_t	operator[] (size_t off) const

std::string	disasm (size_t pc) const
	Disassemble instruction at given offset and return as a string. More...

const char *	read_string (size_t pc) const
	Get a null-terminated string from given offset. More...

const unsigned char *	getFramePointer (size_t pc) const
	Get a pointer to the current instruction within the code. More...

std::int16_t	read_int16 (size_t pc) const
	Get a signed integer value from given offset. More...

std::uint16_t	read_uint16 (size_t pc) const
	read_int16 should check buffer boundaries. More...

std::int32_t	read_int32 (size_t pc) const
	Read a 32-bit integer starting at given offset. More...

float	read_float_little (size_t pc) const
	Read a little-endian 32-bit float starting at given offset. More...

double	read_double_wacky (size_t pc) const
	Read a 64-bit double starting at given offset. More...

const char *	dictionary_get (size_t n) const
	Return a value from the constant pool. More...

const ConstantPool &	readConstantPool (size_t start_pc, size_t stop_pc) const
	Read an SWF::ACTION_CONSTANTPOOL opcode and return as a dictionary. More...

const std::string &	getDefinitionURL () const
	Return url of the SWF this action block was found in. More...

int	getDefinitionVersion () const
	Return version of the SWF this action block was found in. More...

const movie_definition &	getMovieDefinition () const

Detailed Description

A code segment.

This currently holds the actions in a memory buffer, but I'm workin toward making this unneeded so to eventually use a gnash::stream directly and avoid full loads. (not before profiling!). Good, would make jumping to other tags possible.

Constructor & Destructor Documentation

§ action_buffer()

gnash::action_buffer::action_buffer ( const movie_definition & md )

Member Function Documentation

§ dictionary_get()

const char* gnash::action_buffer::dictionary_get ( size_t n ) const

inline

Return a value from the constant pool.

References getDefinitionURL(), getDefinitionVersion(), and readConstantPool().

§ disasm()

std::string gnash::action_buffer::disasm ( size_t pc ) const

Disassemble instruction at given offset and return as a string.

Referenced by gnash::ActionExec::adjustNextPC(), gnash::ActionExec::operator()(), and operator[]().

§ getDefinitionURL()

const std::string & gnash::action_buffer::getDefinitionURL ( ) const

Return url of the SWF this action block was found in.

Referenced by dictionary_get().

§ getDefinitionVersion()

int gnash::action_buffer::getDefinitionVersion ( ) const

Return version of the SWF this action block was found in.

References _, gnash::key::c, gnash::key::d, gnash::key::f, gnash::key::i, gnash::key::l, gnash::log_error(), gnash::key::p, gnash::key::s, and gnash::key::u.

Referenced by gnash::ActionExec::ActionExec(), dictionary_get(), gnash::SWF::SWFHandlers::execute(), and gnash::ActionExec::operator()().

§ getFramePointer()

const unsigned char* gnash::action_buffer::getFramePointer ( size_t pc ) const

inline

Get a pointer to the current instruction within the code.

§ getMovieDefinition()

const movie_definition& gnash::action_buffer::getMovieDefinition ( ) const

inline

Referenced by gnash::ActionExec::operator()().

§ operator[]()

std::uint8_t gnash::action_buffer::operator[] ( size_t off ) const

inline

References _, and disasm().

§ read()

void gnash::action_buffer::read	(	SWFStream &	in,
		unsigned long	endPos
	)

Read action bytes from input stream up to but not including endPos.

Parameters

endPos One past last valid-to-read byte position. Make sure it's > then in.tell() and <= in.get_tag_end_position() or an assertion will fail.

Referenced by gnash::SWF::DoInitActionTag::loader(), and gnash::SWF::DoActionTag::read().

§ read_double_wacky()

double gnash::action_buffer::read_double_wacky ( size_t pc ) const

Read a 64-bit double starting at given offset.

wacky format: 45670123 Useful to hide complexity of underlying buffer access.

Referenced by read_int32().

§ read_float_little()

float gnash::action_buffer::read_float_little ( size_t pc ) const

Read a little-endian 32-bit float starting at given offset.

Useful to hide complexity of underlying buffer access.

Referenced by read_int32().

§ read_int16()

std::int16_t gnash::action_buffer::read_int16 ( size_t pc ) const

inline

Get a signed integer value from given offset.

Useful to hide complexity of underlying buffer access.

References _.

Referenced by gnash::ActionExec::adjustNextPC(), gnash::SWF::SWFHandlers::execute(), gnash::ActionExec::operator()(), read_uint16(), and gnash::ActionExec::skip_actions().

§ read_int32()

std::int32_t gnash::action_buffer::read_int32 ( size_t pc ) const

inline

Read a 32-bit integer starting at given offset.

Useful to hide complexity of underlying buffer access.

References _, read_double_wacky(), and read_float_little().

§ read_string()

const char* gnash::action_buffer::read_string ( size_t pc ) const

inline

Get a null-terminated string from given offset.

Useful to hide complexity of underlying buffer access.

References _.

Referenced by gnash::SWF::SWFHandlers::execute().

§ read_uint16()

std::uint16_t gnash::action_buffer::read_uint16 ( size_t pc ) const

inline

read_int16 should check buffer boundaries.

Get an unsigned short integer value from given offset

References read_int16().

Referenced by readConstantPool().

§ readConstantPool()

const ConstantPool & gnash::action_buffer::readConstantPool	(	size_t	start_pc,
		size_t	stop_pc
	)		const

Read an SWF::ACTION_CONSTANTPOOL opcode and return as a dictionary.

Don't read stop_pc or later.

A dictionary is a table of indexed strings to be used in action blocks to reduce their size. This parser caches dictionaries to avoid reindexing them when encountered multiple times.

Note that there can be multiple constant pools in the same action buffer. See testsuite/misc-swfmill.all/*dict*

References _, gnash::SWF::ARG_DECL_DICT, gnash::SWF::ARG_FUNCTION2, gnash::SWF::ARG_HEX, gnash::SWF::ARG_NONE, gnash::SWF::ARG_PUSH_DATA, gnash::SWF::ARG_S16, gnash::SWF::ARG_STR, gnash::SWF::ARG_U16, gnash::SWF::ARG_U8, gnash::key::d, gnash::key::f, gnash::hexify(), gnash::key::i, gnash::SWF::SWFHandlers::instance(), gnash::SWF::SWFHandlers::lastType(), length, gnash::log_error(), read_uint16(), and gnash::key::SWF.

Referenced by dictionary_get().

§ size()

size_t gnash::action_buffer::size ( ) const

inline

Referenced by gnash::ActionExec::ActionExec(), gnash::Function::Function(), and gnash::ActionExec::operator()().

The documentation for this class was generated from the following files:

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

§ action_buffer()

Member Function Documentation

§ dictionary_get()

§ disasm()

§ getDefinitionURL()

§ getDefinitionVersion()

§ getFramePointer()

§ getMovieDefinition()

§ operator[]()

§ read()

§ read_double_wacky()

§ read_float_little()

§ read_int16()

§ read_int32()

§ read_string()

§ read_uint16()

§ readConstantPool()

§ size()