Difference between revisions of "INVENTORY NONE"
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|desc=Value returned by {{LSLGC|Inventory|Inventory}} functions, to indicate that the inventory item doesn't exist. | |desc=Value returned by {{LSLGC|Inventory|Inventory}} functions, to indicate that the inventory item doesn't exist. | ||
|examples=<lsl> | |examples=<lsl> | ||
string ItemName = " | string ItemName = "MyTexture"; | ||
default | default | ||
{ | { | ||
Revision as of 14:17, 8 January 2013
| LSL Portal | Functions | Events | Types | Operators | Constants | Flow Control | Script Library | Categorized Library | Tutorials |
Description
Constant: integer INVENTORY_NONE = -1;The integer constant INVENTORY_NONE has the value -1
Value returned by Inventory functions, to indicate that the inventory item doesn't exist.
Caveats
Related Articles
Constants
Functions
| • | llGetInventoryType | |||
| • | llGetInventoryNumber | |||
| • | llGetInventoryName |
Examples
<lsl> string ItemName = "MyTexture"; default {
state_entry()
{
if (llGetInventoryType(ItemName) == INVENTORY_NONE)
llOwnerSay( "There is nothing named '" + ItemName + "' in this prim's contents");
}
}</lsl>
Useful Snippets
<lsl>string InventoryName(string name, integer type) {//finds an item in a case insensitive fashion of the given type and returns its true name.
integer a = llGetInventoryType(name);
if(!~a)//a == INVENTORY_NONE
{//it should be noted that INVENTORY_NONE == INVENTORY_ALL == -1; which is why '!~a' works.
string lc_name = llToLower(name);
a = llGetInventoryNumber(type);
while(a)
{//(a = ~-a) is equivalent to --a, but runs faster.
if(llToLower(name = llGetInventoryName(type, a = ~-a)) == lc_name)
{//we found a match ^_^
return name;
}
}
}
else if((a == type) ^ (!~type))//return name, as long as a == type or type == INVENTORY_ALL
{//we already know that a != INVENTORY_NONE, but just in case we use xor instead of or.
return name;
}
return "";//no match ~_~
}
integer InventoryExists(string name, integer type) {//only included to show how this type of check could be done if the value of 'type' is not constant and could be INVENTORY_ALL.
return (llGetInventoryType(name) == type) ^ (!~type);
}//Since INVENTORY_ALL == INVENTORY_NONE, the extra part on the end is required to invert the result.</lsl>