Snippet - Revision history

Q at 20:12, 12 March 2021

2021-03-12T20:12:13Z

← Older revision		Revision as of 20:12, 12 March 2021
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	{{TOCright}}		{{TOCright}}
	A '''Snippet''' is an image of LabVIEW code.		A '''Snippet''' is an image of LabVIEW code. [[LabVIEW 2009]] added native support to embed actual code inside a [[wikipedia:Portable_Network_Graphics\|PNG]] image. With this functionality it is possible to distribute code on a website, inside of a PNG image, and use the image to import the code into a [[VI]].

	[~~http://zone.ni.com/devzone/cda/tut/p/id/9330~~ LabVIEW 2009 ~~introduced~~] ~~the embedding of the~~ actual code inside a [~~http~~:~~//en.wikipedia.org/wiki/~~Portable_Network_Graphics PNG] image.

	With this functionality it is possible to ~~expose your~~ code on a website, and ~~with~~ the ~~same file~~ import the code into a ~~LabVIEW~~ [[~~VI\|~~VI]].

	== Creation ==		== Creation ==
	===Native===		===Native===
	LabVIEW 2009 ~~has native support~~ to create a snippet~~, in~~ the 'Edit' menu ~~select '~~[http://zone.ni.com/reference/en-XX/help/371361G-01/lvhowto/create_visnippet/ ~~Create Snippet from selection~~]'.		Starting with [[LabVIEW 2009]], to create a '''snippet''':
			# Select the code to include on the [[Block Diagram]].
			# Sselect '''Create Snippet from selection''' from the '''Edit''' menu. [http://zone.ni.com/reference/en-XX/help/371361G-01/lvhowto/create_visnippet/]

	===Advanced===		===Advanced===
	With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any ~~LabVIEW~~ version from 7.0 and up.		With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any version from [[LabVIEW 7 Express\|LabVIEW 7.0]] and up.

	== Importing ==		== Importing ==

	=== LabVIEW 2009===		=== LabVIEW 2009 ===

	To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image ~~for~~ a web-page into a VI~~ directly~~.		To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image from a web-page directly into a VI's [[Block Diagram]].

	For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).		For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).
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	=== LabVIEW 8.2, 8.5 and 8.6===		=== LabVIEW 8.2, 8.5 and 8.6===

	To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.		To import a snippet into [[LabVIEW 8.20]] it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.

	== Technique ==		== Technique ==
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	Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>		Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>

	[[Image:MerrimanSnippet.png]]~~<br>~~		[[Image:MerrimanSnippet.png]]

	[http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=8610#M8610 Source ]<br>		[http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=8610#M8610 Source ]<br>
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	The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.		The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.

			== References ==

	[[Category:Code distribution]]		[[Category:Code distribution]]

Q at 19:56, 12 March 2021

2021-03-12T19:56:45Z

← Older revision		Revision as of 19:56, 12 March 2021
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	{{TOCright}}		{{TOCright}}
	A '''Snippet'''~~, in the [[LabVIEW\|LabVIEW]] context,~~ is an image of LabVIEW code.		A '''Snippet''' is an image of LabVIEW code.

	[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.		[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.

Q at 19:56, 12 March 2021

2021-03-12T19:56:24Z

← Older revision		Revision as of 19:56, 12 March 2021
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	{{TOCright}}		{{TOCright}}
	A ~~snippet is~~ in the [[LabVIEW\|LabVIEW]] context an image of LabVIEW code.		A '''Snippet''', in the [[LabVIEW\|LabVIEW]] context, is an image of LabVIEW code.

	[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.		[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.

Q at 19:55, 12 March 2021

2021-03-12T19:55:41Z

← Older revision		Revision as of 19:55, 12 March 2021
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	{{TOCright}}~~<br>~~		{{TOCright}}
			A snippet is in the [[LabVIEW\|LabVIEW]] context an image of LabVIEW code.

	~~A snippet is in the~~ [~~[LabVIEW\|~~LabVIEW]] ~~context an~~ image ~~of LabVIEW code~~.~~<br>~~		[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.

	~~[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>~~		With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].

	With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].~~<br>~~

	== Creation ==		== Creation ==

Q: Cleaned wiki markdown

2021-03-12T19:55:15Z

Cleaned wiki markdown

← Older revision		Revision as of 19:55, 12 March 2021
Line 7:		Line 7:
	With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>		With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>

	= Creation =		== Creation ==
	==Native==		===Native===
	LabVIEW 2009 has native support to create a snippet, in the 'Edit' menu select '[http://zone.ni.com/reference/en-XX/help/371361G-01/lvhowto/create_visnippet/ Create Snippet from selection]'.		LabVIEW 2009 has native support to create a snippet, in the 'Edit' menu select '[http://zone.ni.com/reference/en-XX/help/371361G-01/lvhowto/create_visnippet/ Create Snippet from selection]'.

	==Advanced==		===Advanced===
	With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.~~<br>~~		With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.

	= Importing~~<br>~~ =		== Importing ==

	== LabVIEW 2009~~<br>~~ ==		=== LabVIEW 2009===

	To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.~~<br>~~		To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.

	For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).~~<br>~~		For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).

	== LabVIEW 8.2, 8.5 and 8.6~~<br>~~ ==		=== LabVIEW 8.2, 8.5 and 8.6===

	To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.~~<br>~~		To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.

	= Technique~~<br>~~ =		== Technique ==

	The code of a LabVIEW snippet is stored inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics#.22Chunks.22_within_the_file PNG Chunk] named 'niVI'. The capitalization of this chunkname makes sure the code is removed if someone alters the image, thus preventing the creation of malicious snippets.<br>		The code of a LabVIEW snippet is stored inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics#.22Chunks.22_within_the_file PNG Chunk] named 'niVI'. The capitalization of this chunkname makes sure the code is removed if someone alters the image, thus preventing the creation of malicious snippets.<br>
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	Inside this chunk a filestream representing a VI is stored. LabVIEW interprets this as a normal VI to be embedded.<br>		Inside this chunk a filestream representing a VI is stored. LabVIEW interprets this as a normal VI to be embedded.<br>

	== Code integrity~~<br>~~ ==		=== Code integrity===

	Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>		Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>

Q: Category reorg

2020-06-17T21:10:49Z

Category reorg

← Older revision		Revision as of 21:10, 17 June 2020
Line 43:		Line 43:

	The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.		The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.

			[[Category:Code distribution]]

Tcplomp: /* Creation */

2012-11-24T07:36:37Z

Creation

← Older revision		Revision as of 07:36, 24 November 2012
Line 7:		Line 7:
	With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>		With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>

	= Creation~~<br>~~ =		= Creation =
			==Native==
			LabVIEW 2009 has native support to create a snippet, in the 'Edit' menu select '[http://zone.ni.com/reference/en-XX/help/371361G-01/lvhowto/create_visnippet/ Create Snippet from selection]'.

	~~LabVIEW 2009 has native support to create a snippet.<br>~~		==Advanced==
			With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>
	With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>

	= Importing<br> =		= Importing<br> =

MichaelAivaliotis: Reverted edits by P7s6yZ5w (talk) to last revision by Tcplomp

2011-11-03T20:36:34Z

Reverted edits by P7s6yZ5w (talk) to last revision by Tcplomp

P7s6yZ5w at 10:04, 3 November 2011

2011-11-03T10:04:01Z

Tcplomp at 15:34, 8 February 2010

2010-02-08T15:34:41Z

← Older revision		Revision as of 15:34, 8 February 2010
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	[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>		[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>

			With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>

	= Creation<br> =		= Creation<br> =
Line 9:		Line 11:
	LabVIEW 2009 has native support to create a snippet.<br>		LabVIEW 2009 has native support to create a snippet.<br>

	With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>		With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>

	= Importing<br> =		= Importing<br> =
Line 17:		Line 19:
	To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.<br>		To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.<br>

	For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).<br>		For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).<br>

	== LabVIEW 8.2, 8.5 and 8.6<br> ==		== LabVIEW 8.2, 8.5 and 8.6<br> ==

← Older revision		Revision as of 20:36, 3 November 2011
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	{{TOCright}}<br>		{{TOCright}}<br>

	A snippet is in the [[LabVIEW\|LabVIEW]] context an image of LabVIEW code.<br>		A snippet is in the [[LabVIEW\|LabVIEW]] context an image of LabVIEW code.<br>

	[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>		[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>

	With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>		With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>
Line 9:		Line 9:
	= Creation<br> =		= Creation<br> =

	LabVIEW 2009 has native support to create a snippet.<br>		LabVIEW 2009 has native support to create a snippet.<br>

	With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>		With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>

	= Importing<br> =		= Importing<br> =
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	== LabVIEW 2009<br> ==		== LabVIEW 2009<br> ==

	To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.<br>		To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.<br>

	For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).<br>		For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).<br>

	== LabVIEW 8.2, 8.5 and 8.6<br> ==		== LabVIEW 8.2, 8.5 and 8.6<br> ==

	To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.<br>		To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.<br>

	= Technique<br> =		= Technique<br> =

	The code of a LabVIEW snippet is stored inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics#.22Chunks.22_within_the_file PNG Chunk] named 'niVI'. The capitalization of this chunkname makes sure the code is removed if someone alters the image, thus preventing the creation of malicious snippets.<br>		The code of a LabVIEW snippet is stored inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics#.22Chunks.22_within_the_file PNG Chunk] named 'niVI'. The capitalization of this chunkname makes sure the code is removed if someone alters the image, thus preventing the creation of malicious snippets.<br>

	Inside this chunk a filestream representing a VI is stored. LabVIEW interprets this as a normal VI to be embedded.<br>		Inside this chunk a filestream representing a VI is stored. LabVIEW interprets this as a normal VI to be embedded.<br>

	== Code integrity<br> ==		== Code integrity<br> ==

	Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>		Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>

	[[Image:MerrimanSnippet.png]]<br>		[[Image:MerrimanSnippet.png]]<br>

	[http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=8610#M8610 Source ]<br>		[http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=8610#M8610 Source ]<br>

	Upon dropping this image on a LabVIEW diagram another image was placed.		Upon dropping this image on a LabVIEW diagram another image was placed.

	The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.		The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.

← Older revision		Revision as of 10:04, 3 November 2011
Line 1:		Line 1:
	{{TOCright}}<br>		{{TOCright}}<br>

	A snippet is in the [[LabVIEW\|LabVIEW]] context an image of LabVIEW code.<br>		A snippet is in the [[LabVIEW\|LabVIEW]] context an image of LabVIEW code.<br>

	[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>		[http://zone.ni.com/devzone/cda/tut/p/id/9330 LabVIEW 2009 introduced] the embedding of the actual code inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics PNG] image.<br>

	With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>		With this functionality it is possible to expose your code on a website, and with the same file import the code into a LabVIEW [[VI\|VI]].<br>
Line 9:		Line 9:
	= Creation<br> =		= Creation<br> =

	LabVIEW 2009 has native support to create a snippet.<br>		LabVIEW 2009 has native support to create a snippet.<br>

	With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>		With the [[Code Capture Tool\|Code Capture Tool]] version 2.0 it's possible to create a snippet in any LabVIEW version from 7.0 and up.<br>

	= Importing<br> =		= Importing<br> =
Line 17:		Line 17:
	== LabVIEW 2009<br> ==		== LabVIEW 2009<br> ==

	To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.<br>		To import the actual code into a VI, just drag and drop the image onto the block diagram of a VI. With [http://www.microsoft.com/Windows/internet-explorer/ Internet Explorer] it's possible to drag and drop the image for a web-page into a VI directly.<br>

	For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).<br>		For [http://www.mozilla.com/firefox/ Firefox] and [http://www.google.com/chrome Google Chrome] it's necessary to drop the image in an OS folder or use a plugin [http://addons.mozilla.org/firefox/addon/1419 IETab] (for Firefox).<br>

	== LabVIEW 8.2, 8.5 and 8.6<br> ==		== LabVIEW 8.2, 8.5 and 8.6<br> ==

	To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.<br>		To import a snippet into LabVIEW 8.2 it's possible if the snippet is created with the [[Code Capture Tool\|Code Capture Tool]] in the same (or an older) version of LabVIEW. Second you need a special tool developed by [http://lavag.org/user/7534-jcarmody/ JCarmody]. This tool is available for [http://lavag.org/index.php?app=downloads&showfile=118 download] in the LAVA Uncertified Code Repository.<br>

	= Technique<br> =		= Technique<br> =

	The code of a LabVIEW snippet is stored inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics#.22Chunks.22_within_the_file PNG Chunk] named 'niVI'. The capitalization of this chunkname makes sure the code is removed if someone alters the image, thus preventing the creation of malicious snippets.<br>		The code of a LabVIEW snippet is stored inside a [http://en.wikipedia.org/wiki/Portable_Network_Graphics#.22Chunks.22_within_the_file PNG Chunk] named 'niVI'. The capitalization of this chunkname makes sure the code is removed if someone alters the image, thus preventing the creation of malicious snippets.<br>

	Inside this chunk a filestream representing a VI is stored. LabVIEW interprets this as a normal VI to be embedded.<br>		Inside this chunk a filestream representing a VI is stored. LabVIEW interprets this as a normal VI to be embedded.<br>

	== Code integrity<br> ==		== Code integrity<br> ==

	Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>		Technically it's possible to have a different codeset embedded than represented by the PNG image chunk. This is proven by [http://forums.ni.com/ni/view_profile?user.id=134255 Darin.K] on the [[NI Forums\|NI Forum]] with the following snippet:<br>

	[[Image:MerrimanSnippet.png]]<br>		[[Image:MerrimanSnippet.png]]<br>

	[http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=8610#M8610 Source ]<br>		[http://forums.ni.com/ni/board/message?board.id=BreakPoint&view=by_date_ascending&message.id=8610#M8610 Source ]<br>

	Upon dropping this image on a LabVIEW diagram another image was placed.		Upon dropping this image on a LabVIEW diagram another image was placed.

	The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.		The name of the Snippet Chunk (niVI), describes this chunk as [http://www.w3.org/TR/2003/REC-PNG-20031110/#5Chunk-naming-conventions unsave to copy], tests with Paint.net shows that indeed the chunk is removed when the image is altered. However usage of Microsoft Paint show that the snippet is not removed upon editing of the image.