MkTemplate Class Reference

Create location list (jigdo) and image template (template) from one big file and a list of files. More...

#include <mktemplate.hh>

List of all members.

Public Member Functions
	MkTemplate (JigdoCache *jcache, bistream *imageStream, JigdoConfig *jigdoInfo, bostream *templateStream, ProgressReporter &pr=noReport, int zipQuality=9, size_t readAmnt=128U *1024, bool addImage=true, bool addServers=true, bool useBzip2=false)
	A create operation with no files known to it yet.
	~MkTemplate ()
void	setMatchExec (const string &me)
	Set command(s) to be executed when a file matches.
void	setGreedyMatching (bool x)
	Set and get whether to skip smaller matches if a larger match could be possible (with the risk to skip both).
bool	getGreedyMatching () const
bool	run (const string &imageLeafName="image", const string &templLeafName="template")
	First scan through all the individual files, creating checksums, then read image file and find matches.
Static Public Attributes
static ProgressReporter	noReport
	Default reporter: Only prints error messages to stderr.
Friends
class	PartialMatchQueue
Classes
class	Desc
	Build up a template DESC section by appending items to a JigdoDescVec. More...
class	PartialMatch
	One object for each offset in image where any file /might/ match. More...
class	PartialMatchQueue
	Queue of PartialMatch objects, always kept sorted by ascending nextEvent. More...
struct	PartIndex
	Index over JigdoParts by md5sum string. More...
struct	PartLine
	Line content with whitespace and '=' removed and left/right side swapped, i.e. More...
class	ProgressReporter
	Class allowing MkTemplate to convey information back to the creator of a MkTemplate object. More...

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Detailed Description

Create location list (jigdo) and image template (template) from one big file and a list of files.

The template file contains a compressed version of the big file, excluding the data of any of the other files that are contained somewhere in the big file. Instead of their data, the image template file just lists their checksums.

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Constructor & Destructor Documentation

MkTemplate::MkTemplate	(	JigdoCache *	jcache,
		bistream *	imageStream,
		JigdoConfig *	jigdoInfo,
		bostream *	templateStream,
		ProgressReporter &	pr = noReport,
		int	zipQuality = 9,
		size_t	readAmnt = 128U*1024,
		bool	addImage = true,
		bool	addServers = true,
		bool	useBzip2 = false
	)

A create operation with no files known to it yet.

Parameters:

	jcache	Cache for the files (will not be deleted in dtor)
	imageStream	The large image file
	jigdoInfo	Where to output .jigdo data to
	templateStream	Stream for outputting binary image template
	pr	Function object which is called at regular intervals during run() to inform about files scanned, nr of bytes scanned, matches found etc.
	zipQuality	0 (fast) to 9 (smallest output)
	readAmnt	Number of bytes that are read at a time with one read() call by the operation before the data is processed. Should not be too large because the OS copes best when small bits of I/O are interleaved with small bits of CPU work. In practice, the default seems to work well.
	addImage	Add a [Image] section to the output .jigdo.
	addServers	Add a [Servers] section to the output .jigdo.
	useBzip2	false=>gzip, true=>bzip2

References matches, and off.

MkTemplate::~MkTemplate

(

)

[inline]

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Member Function Documentation

void MkTemplate::setMatchExec

(

const string &

me

)

[inline]

Set command(s) to be executed when a file matches.

void MkTemplate::setGreedyMatching

(

bool

x

)

[inline]

Set and get whether to skip smaller matches if a larger match could be possible (with the risk to skip both).

True <=> prefer small matches; false <=> skip small, prefer large

bool MkTemplate::getGreedyMatching

(

)

const [inline]

bool MkTemplate::run	(	const string &	imageLeafName = "image",
		const string &	templLeafName = "template"
	)

First scan through all the individual files, creating checksums, then read image file and find matches.

Write .template and .jigdo files.

Parameters:

	imageLeafName	Name for the image, which should be a relative path name. This does not need to be similar to the filename that the image has now - it is *only* used when creating the .jigdo file, nowhere else. It is the name that will be used when someone reassembles the image.
	templLeafName	Name to write to jigdo file as template URL. Can be a full http/ftp URL, or a relative URL.

Returns:

returns FAILURE if any open/read/write/close failed, unless it was that of a file with reportErrors==false.

References append(), Assert, JigdoCache::begin(), bitWidth(), JigdoCache::deallocBuffer(), JigdoCache::end(), MD5Sum::finish(), ArrayAutoPtr< X >::get(), JigdoCache::getBlockLen(), JigdoCache::getMD5BlockLen(), JIGDO_VERSION, Paranoid, MD5Sum::update(), and writeBytes().

Referenced by main().

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Friends And Related Function Documentation

friend class PartialMatchQueue [friend]

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Member Data Documentation

MkTemplate::ProgressReporter MkTemplate::noReport [static]

Default reporter: Only prints error messages to stderr.

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

• mktemplate.hh
• mkjigdo.cc
• mktemplate.cc