Fwrite - Revision history

Albie: grandma

2009-01-26T07:51:23Z

grandma

← Older revision		Revision as of 07:51, 26 January 2009
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	A duck goes qu ac k[[$crlf\|<crlf>]]		A duck goes qu ac k[[$crlf\|<crlf>]]
	Ducks go quack [[$crlf\|<crlf>]]		Ducks go quack [[$crlf\|<crlf>]]
	The data, ''A duck goes qu'' is ~~over wrote~~ with ''Ducks go quack'' the original ''ac'' is ~~over wrote~~ with the [[$crlf\|<crlf>]] from the -n switch leaving the k[[$crlf\|<crlf>]] that was already there previously.		The data, ''A duck goes qu'' is overwritten with ''Ducks go quack'' the original ''ac'' is overwritten with the [[$crlf\|<crlf>]] from the -n switch leaving the k[[$crlf\|<crlf>]] that was already there previously.

Albie: Created notes section and added information about how /fwrite overwrites data.

2009-01-25T13:22:53Z

Created notes section and added information about how /fwrite overwrites data.

← Older revision		Revision as of 13:22, 25 January 2009
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	'''~~Note~~''' ~~that it~~ will ~~append~~ the ~~text to~~ the file~~. To overwrite / insert~~, ~~you have to look at~~ [[~~Fseek~~\|~~/fseek~~]] ~~before~~.		== Notes ==
			* The file handler must be [[Fopen\|opened]] before using /fwrite.
			* When the file handler is first opened the pointer is at the end of the file so any /fwrite's upon opening the file handler will be appended to the file.
			* When writing to the file handler you're never inserting data, you're overwriting data unless the data you're writing at the pointer exceeds the end of the file.
			If you have a file containing this data below opened in a file handler called ''test'':
			A duck goes quack
			Dogs go woof
			Fish go moo
			Dana is silent but deadly
			And you issue the command:
			/[[fseek]] test -l 1
			/fwrite -n test Ducks go quack
			You will end up with a file containing:
			Ducks go quack
			k
			Dogs go woof
			Fish go moo
			Dana is silent but deadly
			The reason for this is /fwrite overwrites the same amount of data (unless exceeding the end of the file) from the file handler that you're writing (plus two if you issue -n for the [[$crlf]])
			A duck goes qu ac k[[$crlf\|<crlf>]]
			Ducks go quack [[$crlf\|<crlf>]]
			The data, ''A duck goes qu'' is over wrote with ''Ducks go quack'' the original ''ac'' is over wrote with the [[$crlf\|<crlf>]] from the -n switch leaving the k[[$crlf\|<crlf>]] that was already there previously.

	~~'''Note''' that the file has to be opened ([[Fopen\|/fopen]]) before.~~

	== Example ==		== Example ==

Doomie: changed some links due to stupidity

2005-12-18T22:52:27Z

changed some links due to stupidity

← Older revision		Revision as of 22:52, 18 December 2005
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	\| style="width:10%" \| '''''Switch''''' \|\| Style="width:90%" \| '''''Meaning'''''		\| style="width:10%" \| '''''Switch''''' \|\| Style="width:90%" \| '''''Meaning'''''
	\|-		\|-
	\| b \|\| indicates that a &binvar is being specified		\| b \|\| indicates that a [[:Category:Binary Files\|&binvar]] is being specified
	\|-		\|-
	\| n \|\| appends a $crlf to the line being written.		\| n \|\| appends a [[$crlf]] to the line being written.
	\|}		\|}

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	/fwrite -n moo moo!		/fwrite -n moo moo!
	This will add ''moo!'' and a [[$crlf]] to the end of the file assigned to the name ''moo''.		This will add ''moo!'' and a $crlf to the end of the file assigned to the name ''moo''.


	/fwrite -b moo &moo		/fwrite -b moo &moo
	This will add the content of the ~~[[:Category:Binary Files\|~~Binary Variable &moo]] to the end of the file assigned to the name ''moo''.		This will add the content of the Binary Variable &moo to the end of the file assigned to the name ''moo''.


	[[Category:File Handling]][[Category:Commands]]		[[Category:File Handling]][[Category:Commands]]

Doomie at 22:51, 18 December 2005

2005-12-18T22:51:26Z

New page

Writes text or the specified binary variable to the file.
/fwrite [-bn] <name> <text | &binvar>

Explanation of the switches:
{| style="width:100%"
|-
| style="width:10%" | '''''Switch''''' || Style="width:90%" | '''''Meaning'''''
|-
| b || indicates that a &binvar is being specified
|-
| n || appends a $crlf to the line being written.
|}

'''Note''' that it will append the text to the file. To overwrite / insert, you have to look at [[Fseek|/fseek]] before.

'''Note''' that the file has to be opened ([[Fopen|/fopen]]) before.

== Example ==
/fwrite moo moo!
This will just add ''moo!'' to the end of the file assigned to the name ''moo''.

/fwrite -n moo moo!
This will add ''moo!'' and a [[$crlf]] to the end of the file assigned to the name ''moo''.

/fwrite -b moo &moo
This will add the content of the [[:Category:Binary Files|Binary Variable &moo]] to the end of the file assigned to the name ''moo''.

[[Category:File Handling]][[Category:Commands]]

← Older revision		Revision as of 07:51, 26 January 2009
Line 35:		Line 35:
	A duck goes qu ac k[[$crlf\|<crlf>]]		A duck goes qu ac k[[$crlf\|<crlf>]]
	Ducks go quack [[$crlf\|<crlf>]]		Ducks go quack [[$crlf\|<crlf>]]
	The data, ''A duck goes qu'' is ~~over wrote~~ with ''Ducks go quack'' the original ''ac'' is ~~over wrote~~ with the [[$crlf\|<crlf>]] from the -n switch leaving the k[[$crlf\|<crlf>]] that was already there previously.		The data, ''A duck goes qu'' is overwritten with ''Ducks go quack'' the original ''ac'' is overwritten with the [[$crlf\|<crlf>]] from the -n switch leaving the k[[$crlf\|<crlf>]] that was already there previously.