Hacker Guide/Variables - Revision history

DoesItReallyMatter: Use Template:Under construction

2019-04-17T08:23:15Z

← Older revision		Revision as of 08:23, 17 April 2019
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	{{Back to\|Hacker Guide}}		{{Back to\|Hacker Guide}}

	~~<font size="30px">~~{{~~font colour\|red\|WARNING: page under~~ construction}}~~</font>~~		{{Under construction}}

	== Introduction ==		== Introduction ==

2019-04-17T06:36:03Z

Fix last

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	{{Back to\|Hacker Guide}}		{{Back to\|Hacker Guide}}

	<font size="30px">{{font colour\|red\|WARNING: page under construction}}</font>		<font size="30px">{{font colour\|red\|WARNING: page under construction}}</font>

2019-04-17T06:35:34Z

+{{Back to|Hacker Guide}}

← Older revision		Revision as of 06:35, 17 April 2019
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			{{Back to\|Hacker Guide}}
	<font size="30px">{{font colour\|red\|WARNING: page under construction}}</font>		<font size="30px">{{font colour\|red\|WARNING: page under construction}}</font>

2019-04-17T04:09:27Z

Lc/e

← Older revision		Revision as of 04:09, 17 April 2019
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	<font ~~color="red"~~ size="30px">WARNING: page under construction</font>		<font size="30px">{{font colour\|red\|WARNING: page under construction}}</font>

	== Introduction ==		== Introduction ==
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	'''var_CreateGet*''' functions will create the variable and the get the default value if the variable wasn't already created.		'''var_CreateGet*''' functions will create the variable and the get the default value if the variable wasn't already created.

	If the variable does exist before the call it will get the current value (and increment its [~~http~~://en~~.wikipedia.org/wiki/~~Refcount refcount]).		If the variable does exist before the call it will get the current value (and increment its [[wikipedia:en:Refcount\|refcount]]).

	var_Create(a,b,c)		var_Create(a,b,c)
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	var_CreateGetNonEmptyStringCommand(a,b)		var_CreateGetNonEmptyStringCommand(a,b)

	A variable must be created if you want to add a callback or change the value (with var_Set) of a variable <br>		A variable must be created if you want to add a callback or change the value (with <code>var_Set</code>) of a variable <br>

	{{Hacker_Guide}}		{{Hacker_Guide}}

2013-11-16T02:02:19Z

var_Inherit

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	=== var_Inherit ===		=== var_Inherit ===
	'''var_Inherit*''' functions will get the default value (from configuration, for example) or the one set by the parent object.		'''var_Inherit*''' functions will get the default value (from configuration, for example) or the one set by the parent object.

			This is the function you will want to use most of the time if you are unsure.

	General prototype:		General prototype:

2013-11-14T17:26:41Z

var_CreateGet

← Older revision		Revision as of 17:26, 14 November 2013
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	A variable must be created if you want to add a callback or change the value (with var_Set) of a variable <br>		A variable must be created if you want to add a callback or change the value (with var_Set) of a variable <br>

	~~[[Category:Coding]]~~
	{{Hacker_Guide}}		{{Hacker_Guide}}

2013-10-30T16:21:45Z

2013-10-19T02:44:13Z

Introduction

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	{{VLC}} has a powerful "object variable" infrastructure, that can be used to pass information between modules.		{{VLC}} has a powerful "object variable" infrastructure, that can be used to pass information between modules.

	It can be compared to an [~~http~~:~~//en.wikipedia.org/wiki/Observer_pattern~~ Observer ~~Pattern~~].		It can be compared to an [[wikipedia:Observer pattern\|observer pattern]].

	== Variable Functions ==		== Variable Functions ==

2013-10-19T02:43:39Z

var_Inherit

← Older revision		Revision as of 02:43, 19 October 2013
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	Reading the "volume-step" configuration option:		Reading the "volume-step" configuration option:

	float volumeStep = ~~var_InheritInteger~~( p_this, "volume-step" );		float volumeStep = var_InheritFloat( p_this, "volume-step" );

	=== var_CreateGet ===		=== var_CreateGet ===

2013-10-19T02:43:07Z

var_Inherit

← Older revision		Revision as of 02:43, 19 October 2013
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	=== var_Inherit ===		=== var_Inherit ===
			'''var_Inherit*''' functions will get the default value (from configuration, for example) or the one set by the parent object.

	~~'''~~var_Inherit*~~''' functions will get the default value (from configuration~~, for ~~example) or the one set by the parent object~~.		General prototype:
			<type> var_Inherit<type>( vlc_object_t obj, const char name );

			You are responsible for freeing any strings used.

	var_Inherit		var_Inherit
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	var_InheritAddress		var_InheritAddress
	var_InheritURational		var_InheritURational

			====Example====
			Reading the "volume-step" configuration option:

			float volumeStep = var_InheritInteger( p_this, "volume-step" );

	=== var_CreateGet ===		=== var_CreateGet ===