LlGetNotecardLineSync

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/LSL

GetNotecardLineSync

llGetNotecardLineSync

Summary

Function: string llGetNotecardLineSync( string name, integer line );

0.0	Forced Delay
10.0	Energy

Gets the line of the notecard name from the region's notecard cache immediately without raising a dataserver event.
Returns the string containing the text of the requested line from the notecard.

• string	name	–	a notecard in the inventory of the prim this script is in or a UUID of a notecard
• integer	line	–	Line number in a notecard (the index starts at zero).

line does not support negative indexes. Returns EOF if line is past the end of the notecard.

Specification

This function returns a string containing the requested line from a notecard in prim inventory, without the need for an asynchronous dataserver event, if the notecard is cached/known in its entirety by the simulator. This speeds up acessing notecard lines tremendously, and allows for near instantaneous random access.

If the notecard does not exist it returns the constant NAK and will shout a message to the debug channel. If the notecard has not been previously cached on the simulator it will return the NAK constant.

Notecards are cached into a fixed-size buffer, with the oldest (least-recently read) notecard getting removed first. It is not safe to assume a notecard has been previously cached. Data for a previously cached notecard may be dropped from the cache at any time, especially on a busy server.

Caveats

• If line is out of bounds the script continues to execute without an error message.
• If name is missing from the prim's inventory and it is not a UUID or it is not a notecard then an error is shouted on DEBUG_CHANNEL.
• If name is a UUID then there are no new asset permissions consequences for the object.
  • The resulting object develops no new usage restrictions that might have occurred if the asset had been placed in the prims inventory.
• If name is a new empty notecard (never saved) then an error "Couldn't find notecard ~NAME~" (~NAME~ being the value of name) will be shouted on the DEBUG_CHANNEL. This is because until a notecard is saved for the first time, it does not exist as an asset only as an inventory placeholder.
  • If the notecard is full-perms you can check for this with llGetInventoryKey which will return NULL_KEY in this case. However if notecard is not full-perms, there is no way to avoid the error message.
• If notecard contains embedded inventory items (such as textures and landmarks), EOF will be returned, regardless of the line requested.
• If the requested line is longer than 1024 bytes the returned string will be truncated to the first 1024 bytes of the line.
• A dataserver event does not get raised. Therefore, other scripts in the linkset are unaware of the processed notecard lines.

Examples

string NOTECARD_NAME = "notecard";
key READ_KEY = NULL_KEY;

default
{

    touch_start(integer total_number)
    {
        READ_KEY = llGetNumberOfNotecardLines(NOTECARD_NAME);
    }
    
    dataserver(key request, string data)
    {
        if (request == READ_KEY)
        {
            integer count = (integer)data;
            integer index;
            
            for (index = 0; index < (count+1); ++index)
            {
                string line = llGetNotecardLineSync(NOTECARD_NAME, index);
                if (line == NAK)
                {
                    llOwnerSay("---NAK---");
                }
                else if (line == EOF)
                {
                    llOwnerSay("---EOF---");
                }
                else
                {
                    llOwnerSay(line);
                }
            }
        }
    }
}

See Also

Functions

•	llGetNumberOfNotecardLines
•	llGetNotecardLine

Deep Notes

Signature
function string llGetNotecardLineSync( string name, integer line );