Difference between revisions of "INVENTORY NONE"

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m (Undo revision 85988 by Zai Lynch (Talk) just to sidetracked at times... lalala)
Line 3: Line 3:
 
|type=integer
 
|type=integer
 
|value=-1
 
|value=-1
|desc
+
|desc=Value returned by {{LSLGC|Inventory|Inventory}} functions which defines that the inventory item doesn't exist.
|examples
+
|examples=<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>
 
|constants={{LSL DefineRow||[[INVENTORY_ALL]]|}}
 
|constants={{LSL DefineRow||[[INVENTORY_ALL]]|}}
 +
{{LSL DefineRow||[[INVENTORY ANIMATION]]|}}
 +
{{LSL DefineRow||[[INVENTORY BODYPART]]|}}
 +
{{LSL DefineRow||[[INVENTORY CLOTHING]]|}}
 +
{{LSL DefineRow||[[INVENTORY GESTURE]]|}}
 +
{{LSL DefineRow||[[INVENTORY LANDMARK]]|}}
 +
{{LSL DefineRow||[[INVENTORY NOTECARD]]|}}
 +
{{LSL DefineRow||[[INVENTORY OBJECT]]|}}
 +
{{LSL DefineRow||[[INVENTORY SCRIPT]]|}}
 +
{{LSL DefineRow||[[INVENTORY SOUND]]|}}
 +
{{LSL DefineRow||[[INVENTORY TEXTURE]]|}}
 
|functions={{LSL DefineRow||[[llGetInventoryType]]|}}
 
|functions={{LSL DefineRow||[[llGetInventoryType]]|}}
 
{{LSL DefineRow||[[llGetInventoryNumber]]|}}
 
{{LSL DefineRow||[[llGetInventoryNumber]]|}}

Revision as of 08:01, 2 January 2012

Description

Constant: integer INVENTORY_NONE = -1;

The integer constant INVENTORY_NONE has the value -1

Value returned by Inventory functions which defines that the inventory item doesn't exist.

Examples

<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>

Deep Notes

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Signature

integer INVENTORY_NONE = -1;