libdar::cat_entree Class Reference

the root class from all other inherite for any entry in the catalogue More...

#include <cat_entree.hpp>

Inheritance diagram for libdar::cat_entree:

Collaboration diagram for libdar::cat_entree:

Public Member Functions
	cat_entree (saved_status val)
	setup an object when read from filesystem
	cat_entree (const smart_pointer< pile_descriptor > &pdesc, bool small, saved_status val)
	setup an object when read from an archive More...
	cat_entree (const cat_entree &ref)=default
	cat_entree (cat_entree &&ref) noexcept=default
cat_entree &	operator= (const cat_entree &ref)=default
cat_entree &	operator= (cat_entree &&ref)=default
virtual	~cat_entree () noexcept(false)
	destructor
virtual bool	operator== (const cat_entree &ref) const =0
	returns true if the two object are the same
bool	operator!= (const cat_entree &ref) const
bool	same_as (const cat_entree &ref) const
	return true of the two objects would generate the same entry on filsystem More...
void	dump (const pile_descriptor &pdesc, bool small) const
	write down the object information to a stack More...
void	specific_dump (const pile_descriptor &pdesc, bool small) const
	this call gives an access to inherited_dump More...
virtual void	post_constructor (const pile_descriptor &pdesc)
	let inherited classes build object's data after CRC has been read from file in small read mode More...
virtual unsigned char	signature () const =0
	inherited class signature
virtual std::string	get_description () const =0
	inherited class designation
virtual cat_entree *	clone () const =0
	a way to copy the exact type of an object even if pointed to by a parent class pointer
virtual void	change_location (const smart_pointer< pile_descriptor > &pdesc)
saved_status	get_saved_status () const
	obtain the saved status of the object
void	set_saved_status (saved_status x)
	modify the saved_status of the object
void	set_list_entry (const slice_layout *sly, bool fetch_ea, list_entry &ent) const
	setup a list_entry object relative to the current cat_entree object More...

Static Public Member Functions
static cat_entree *	read (const std::shared_ptr< user_interaction > &dialog, const smart_pointer< pile_descriptor > &f, const archive_version &reading_ver, entree_stats &stats, std::map< infinint, cat_etoile * > &corres, compression default_algo, bool lax, bool only_detruit, bool small)
	read and create an object of inherited class of class cat_entree More...

Protected Member Functions
virtual void	inherited_dump (const pile_descriptor &pdesc, bool small) const
	inherited class may overload this method but shall first call the parent's inherited_dump() in the overloaded method
pile *	get_pile () const
	stack used to read object from (nullptr is returned for object created from filesystem)
proto_compressor *	get_compressor_layer () const
	compressor generic_file relative methods More...
escape *	get_escape_layer () const
	escape generic_file relative methods More...
generic_file *	get_read_cat_layer (bool small) const
	return the adhoc layer in the stack to read from the catalogue objects (except the EA, FSA or Data part)

Private Attributes
saved_status	xsaved
	inode data status, this field is stored with signature() in the cat_signature field -> must be managed by cat_entree
smart_pointer< pile_descriptor >	pdesc

Static Private Attributes
static const U_I	ENTREE_CRC_SIZE

Detailed Description

the root class from all other inherite for any entry in the catalogue

Definition at line 59 of file cat_entree.hpp.

Constructor & Destructor Documentation

cat_entree()

libdar::cat_entree::cat_entree	(	const smart_pointer< pile_descriptor > &	pdesc,
		bool	small,
		saved_status	val
	)

setup an object when read from an archive

Parameters

[in]	pdesc	points to an existing stack that will be read from to setup fields of inherited classes, this pointed to pile object must survive the whole life of the cat_entree object
[in]	small	whether a small or a whole read is to be read, (inode has been dump() with small set to true)
[in]	val	saved_status to assign the the new object

Member Function Documentation

change_location()

virtual void libdar::cat_entree::change_location ( const smart_pointer< pile_descriptor > &  pdesc )

virtual

for archive merging, will let the object drop EA, FSA and Data to an alternate stack than the one it has been read from

Note

this is used when cloning an object from a catalogue to provide a merged archive. Such cloned object must point the stack of the archive under construction, so we use this call for that need,

this is also used when opening a catalogue if an isolated catalogue in place of the internal catalogue of an archive

this method is virtual in order for cat_directory to overwrite it and propagate the change to all entries of the directory tree as well for mirage to propagate the change to the hard linked inode

Reimplemented in libdar::cat_mirage, and libdar::cat_directory.

Referenced by libdar::cat_mirage::change_location().

dump()

void libdar::cat_entree::dump	(	const pile_descriptor &	pdesc,
		bool	small
	)		const

write down the object information to a stack

Parameters

[in,out]	pdesc	is the stack where to write the data to
[in]	small	defines whether to do a small or normal dump

get_compressor_layer()

proto_compressor* libdar::cat_entree::get_compressor_layer ( ) const

inlineprotected

compressor generic_file relative methods

Note

CAUTION: the pointer to object is member of the get_pile() stack and may be managed by another thread all precaution like get_pile()->flush_read_above(get_compressor_layer() shall be take to avoid concurrent access to the proto_compressor object by the current thread and the thread managing this object

Definition at line 193 of file cat_entree.hpp.

References libdar::smart_pointer< T >::is_null().

get_escape_layer()

escape* libdar::cat_entree::get_escape_layer ( ) const

inlineprotected

escape generic_file relative methods

Note

CAUTION: the pointer to object is member of the get_pile() stack and may be managed by another thread all precaution like get_pile()->flush_read_above(get_escape_layer() shall be take to avoid concurrent access to the compressor object by the current thread and the thread managing this object

Definition at line 200 of file cat_entree.hpp.

References libdar::smart_pointer< T >::is_null().

post_constructor()

virtual void libdar::cat_entree::post_constructor ( const pile_descriptor &  pdesc )

inlinevirtual

let inherited classes build object's data after CRC has been read from file in small read mode

Parameters

[in]

pdesc

stack to read the data from

Note

used from cat_entree::read to complete small read

this method is called by cat_entree::read and mirage::post_constructor only when contructing an object with small set to true

Reimplemented in libdar::cat_mirage, and libdar::cat_file.

Definition at line 139 of file cat_entree.hpp.

read()

static cat_entree* libdar::cat_entree::read ( const std::shared_ptr< user_interaction > &  dialog, const smart_pointer< pile_descriptor > &  f, const archive_version &  reading_ver, entree_stats &  stats, std::map< infinint, cat_etoile * > &  corres, compression  default_algo, bool  lax, bool  only_detruit, bool  small  )

static

read and create an object of inherited class of class cat_entree

Parameters

[in]	dialog	for user interaction
[in]	f	where from to read data in order to create the object
[in]	reading_ver	archive version format to use for reading
[in,out]	stats	updated statistical fields
[in,out]	corres	used to setup hard links
[in]	default_algo	default compression algorithm
[in]	lax	whether to use relax mode
[in]	only_detruit	whether to only consider detruit objects (in addition to the directory tree)
[in]	small	whether the dump() to read has been done with the small argument set

same_as()

bool libdar::cat_entree::same_as ( const cat_entree &  ref ) const

inline

return true of the two objects would generate the same entry on filsystem

for a and b two cat_entree, if a == b, then a.same_as(b) is true also. But the opposit may be wrong if for example "a" is a hardlink pointing to an inode while b is a normal inode, restoring both could lead to having the same entry in filsystem while a and b are different for libdar: here they are objects of two different classes.

Definition at line 120 of file cat_entree.hpp.

Referenced by libdar::cat_nomme::same_as().

set_list_entry()

void libdar::cat_entree::set_list_entry	(	const slice_layout *	sly,
		bool	fetch_ea,
		list_entry &	ent
	)		const

setup a list_entry object relative to the current cat_entree object

Parameters

[in]	sly	the slice layout that shall be used for file location in slices
[in]	fetch_ea	whether to fetch EA and fill these values into the generated list_entry
[out]	ent	the list_entry that will be setup by the call

Note

if sly is set to nullptr, no slice location is performed, this brings some speed improvement when this information is not required

specific_dump()

void libdar::cat_entree::specific_dump ( const pile_descriptor &  pdesc, bool  small  ) const

inline

this call gives an access to inherited_dump

Parameters

[in,out]	pdesc	is the stack where to write the data to
[in]	small	defines whether to do a small or normal dump

Definition at line 132 of file cat_entree.hpp.

References inherited_dump().

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

• cat_entree.hpp