#include <filesystem_helper.h>

Inheritance diagram for reader_membuffer_base:

Public Member Functions
	reader_membuffer_base ()

bool	can_seek ()

t_filesize	get_position (abort_callback &p_abort)

t_filesize	get_size (abort_callback &p_abort)

bool	is_in_memory ()

t_size	read (void *p_buffer, t_size p_bytes, abort_callback &p_abort)

void	reopen (abort_callback &p_abort)

void	seek (t_filesize position, abort_callback &p_abort)

void	write (const void *p_buffer, t_size p_bytes, abort_callback &p_abort)

Protected Member Functions
virtual const void *	get_buffer ()=0

virtual t_size	get_buffer_size ()=0

virtual bool	get_content_type (pfc::string_base &)

virtual t_filetimestamp	get_timestamp (abort_callback &p_abort)=0

void	seek_internal (t_size p_offset)

Private Attributes
t_size	m_offset

Detailed Description

Definition at line 23 of file filesystem_helper.h.

Constructor & Destructor Documentation

reader_membuffer_base::reader_membuffer_base ( )

inline

Definition at line 25 of file filesystem_helper.h.

25 : m_offset(0) {}

reader_membuffer_base::m_offset

t_size m_offset

Definition: filesystem_helper.h:46

Member Function Documentation

bool reader_membuffer_base::can_seek ( )

inline

Definition at line 36 of file filesystem_helper.h.

36 {return true;}

virtual const void* reader_membuffer_base::get_buffer ( )

protectedpure virtual

Implemented in reader_membuffer_mirror, and reader_membuffer_simple.

virtual t_size reader_membuffer_base::get_buffer_size ( )

protectedpure virtual

Implemented in reader_membuffer_mirror, and reader_membuffer_simple.

virtual bool reader_membuffer_base::get_content_type ( pfc::string_base & )

inlineprotectedvirtual

Reimplemented in reader_membuffer_mirror.

Definition at line 43 of file filesystem_helper.h.

43 {return false;}

t_filesize reader_membuffer_base::get_position ( abort_callback & p_abort )

inline

Definition at line 32 of file filesystem_helper.h.

32 {return m_offset;}

reader_membuffer_base::m_offset

t_size m_offset

Definition: filesystem_helper.h:46

t_filesize reader_membuffer_base::get_size ( abort_callback & p_abort )

inline

Definition at line 31 of file filesystem_helper.h.

31 {return get_buffer_size();}

reader_membuffer_base::get_buffer_size

virtual t_size get_buffer_size()=0

virtual t_filetimestamp reader_membuffer_base::get_timestamp ( abort_callback & p_abort )

protectedpure virtual

Implemented in reader_membuffer_mirror, and reader_membuffer_simple.

bool reader_membuffer_base::is_in_memory ( )

inline

Definition at line 37 of file filesystem_helper.h.

37 {return true;}

t_size reader_membuffer_base::read	(	void *	p_buffer,
		t_size	p_bytes,
		abort_callback &	p_abort
	)

Definition at line 89 of file filesystem_helper.cpp.

                                                                                           {
     p_abort.check_e();
     t_size max = get_buffer_size();
     if (max < m_offset) uBugCheck();
     max -= m_offset;
     t_size delta = p_bytes;
     if (delta > max) delta = max;
     memcpy(p_buffer,(char*)get_buffer() + m_offset,delta);
     m_offset += delta;
     return delta;
 }

void reader_membuffer_base::reopen ( abort_callback & p_abort )

inline

Definition at line 34 of file filesystem_helper.h.

34 {seek(0,p_abort);}

reader_membuffer_base::seek

void seek(t_filesize position, abort_callback &p_abort)

Definition: filesystem_helper.cpp:101

void reader_membuffer_base::seek	(	t_filesize	position,
		abort_callback &	p_abort
	)

Definition at line 101 of file filesystem_helper.cpp.

                                                                              {
     p_abort.check_e();
     t_filesize max = get_buffer_size();
     if (position == filesize_invalid || position > max) throw exception_io_seek_out_of_range();
     m_offset = (t_size)position;
 }