LlGetNotecardLine - Second Life Wiki

LlGetNotecardLine

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Summary

Function: key llGetNotecardLine( string name, integer line );

Requests the line line of the notecard name from the dataserver.
Returns the handle (a key) for a dataserver event response.

• 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. If line is past the end of the notecard EOF is returned by the dataserver.

Caveats

  • This function causes the script to sleep for 0.1 seconds.
  • 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 (llGetInventoryKey will return NULL_KEY).
  • 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 255 bytes the dataserver will return the first 255 bytes of the line.
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Examples

key notecardQueryId;
string notecardName = "name of notecard as in object's contents";
 
// script-wise, the first notecard line is line 0, the second line is line 1, etc.
integer notecardLine;
 
say(string inputString)
{
    llOwnerSay(inputString);
}
 
default
{
    state_entry()
    {
        // Check the notecard exists, and has been saved
        if (llGetInventoryKey(notecardName) == NULL_KEY)
        {
            llOwnerSay( "Notecard '" + notecardName + "' missing or unwritten");
            return;
        }
        // say("reading notecard named '" + notecardName + "'.");
        notecardQueryId = llGetNotecardLine(notecardName, notecardLine);
    }
 
    dataserver(key query_id, string data)
    {
        if (query_id == notecardQueryId)
        {
            if (data == EOF)
                say("Done reading notecard, read " + (string) notecardLine + " notecard lines.");
            else
            {
                // bump line number for reporting purposes and in preparation for reading next line
                ++notecardLine;
                say( "Line: " + (string) notecardLine + " " + data);
                notecardQueryId = llGetNotecardLine(notecardName, notecardLine);
            }
        }
    }
}

Useful Snippets

/////
//  Generic Multi Notecard reader by Brangus Weir
//  Given freely and published on wiki.secondlife.com
//
//  This script will read three note cards and store the results into three lists.
//  It can be modified and extended to as many (or few) cards as you'd like to read. 
//
 
list gOneCard;    // All the lines from from the first card
list gTwoCard;    // All the lines from from the second card
list gThreeCard;  // All the lines from from the third card
 
string gsCardOneName = "One";  //Set these to the name of the invetory item.
string gsCardTwoName = "Two";
string gsCardThreeName = "Three";
 
//Temporary variables for processing
string g_sNoteCardName; // Name of the card to be read.
list g_lTempLines;      // The resulting data pushed into a list
integer g_iLine;        // The line count for the card reader
key g_kQuery;           // The key of the card being read
 
 
initialize(string _action) {
    // Due to the execution order when using dataserver, this function sets the first card to 
    // be read, and the excetuion finishes when called again with the _action set to "finish".
    if (_action == "") {
        loadNoteCard(gsCardOneName);
    } else if (_action == "finish") {
        // All cards have been read into the lists... now you can do any kind of string
        // manipulations to get the data you need to set your script.
        // But here we will prove that the cards have been read with a loop
 
        g_lTempLines = []; // lets not forget to delete this global, or it will be dead weight.
 
        integer len = llGetListLength(gOneCard);  //Always evaluate this once, don't do it
                                                  //INSIDE the for loop like noob programers will.
                                                  //Reduce lag, THINK ABOUT MACHINE CYCLES!
        integer i = 0;
        for (; i< len; ++i)
            llSay(0, llList2String(gOneCard,i));
 
        len = llGetListLength(gTwoCard);
        for (i = 0; i< len; ++i)
            llSay(0, llList2String(gTwoCard,i));
 
        len = llGetListLength(gThreeCard);
        for (i = 0; i< len; ++i)
            llSay(0, llList2String(gThreeCard,i));
    }                
 
}
 
loadNoteCard( string _notecard ) {
    g_lTempLines = []; //clear the temp lines
    g_sNoteCardName = _notecard;
    g_iLine = 0;
    g_kQuery = llGetNotecardLine(g_sNoteCardName, g_iLine);  
 
}
 
notecardFinished(string _notecard){
    // Called at the end of each notecard as it is read. The temp results are stored
    // and the next card is commanded to be read.
    if (_notecard == gsCardOneName) {
        gOneCard = g_lTempLines;
        loadNoteCard(gsCardTwoName);
    } else if (_notecard == gsCardTwoName) {
        gTwoCard = g_lTempLines;
        loadNoteCard(gsCardThreeName);
    } else if (_notecard == gsCardThreeName) {
        gThreeCard = g_lTempLines;
        initialize("finish");  // Finally pass execution to finish the initialization.   
    }    
}
 
default
{
    state_entry()
    {
    }
 
    touch_start(integer _num_det){
        initialize("");
    }
 
    dataserver(key _query_id, string _data) 
    {
        if (_query_id == g_kQuery) {
            // this is a line of our notecard
            if (_data != EOF) {    
                g_lTempLines += _data;
                //request a next line
                ++g_iLine;   // increment line count
                g_kQuery = llGetNotecardLine(g_sNoteCardName, g_iLine);
            } else {
                //The notecard has been read 
                //notify end of read
                notecardFinished(g_sNoteCardName);
            }
        }
    }
}
/////
//  Generic Multi Notecard reader by Randur Source
//  Given freely and published on wiki.secondlife.com
//
//  This script will read all note cards in sequence and dump the results into chat as an example.
//  It can be modified and extended to do other things to the data. 
//
 
integer inventorycnt;
integer notecardlinecnt;
integer notecardlinenumber;
string notecardname;
key linenumberid;
key lineid;
 
getnextnotecardlinenumber()
{
    // first get the number of lines from the notecard
    inventorycnt++;
    if (inventorycnt < llGetInventoryNumber(INVENTORY_NOTECARD))
    {
        notecardname = llGetInventoryName(INVENTORY_NOTECARD,inventorycnt);
        linenumberid = llGetNumberOfNotecardLines(notecardname);
    }
    else
        llOwnerSay("Done.");
}
 
getnextnotecardline()
{
     // get the next line from the notecard or skip to the next notecard
    notecardlinecnt++;
    if (notecardlinecnt < notecardlinenumber)
        lineid = llGetNotecardLine(notecardname,notecardlinecnt);
    else
        getnextnotecardlinenumber();
}
 
default
{
    touch_start(integer total_number)
    {
        if (llDetectedKey(0) != llGetOwner()) return; // allow owner only
 
        inventorycnt = -1;
        getnextnotecardlinenumber();
    }
 
    dataserver(key queryid,string data)
    {
        if (queryid == linenumberid) // this was a line number lookup
        {
            linenumberid = NULL_KEY;
            notecardlinenumber = (integer)data;
            if (notecardlinenumber == 0)
                getnextnotecardlinenumber();
            else
            {
                notecardlinecnt = -1;
                getnextnotecardline();
            }
        }
        else if (queryid == lineid) // this was a data line lookup
        {
            lineid = NULL_KEY;
 
            // Example of what to do with the data:
            // Test for valid avatar names, possibly multiple names on each line, separated by ,
            // and say them in chat to the owner
            list names = llParseString2List(data,[","],[]); // split lines on ,
            integer len = llGetListLength(names); // I wouldn't dare to put this inside the for loop
            integer cnt;
            for (cnt = 0; cnt < len; cnt++)
            {
                string name = llDumpList2String(llParseString2List(llList2String(names,cnt),[" "],[])," "); // remove extra spaces
                if (llGetListLength(llParseString2List(name,[" "],[])) == 2) // check for first + lastname
                    llOwnerSay(notecardname + ": " + name);
            }
 
            getnextnotecardline();
        }
    }
}

Notes

The notecard read can be no modify, or no modify/no copy.

See Also

Events

•  dataserver

Functions

•  llGetNumberOfNotecardLines

Deep Notes

History

Search JIRA for related Issues

Footnotes

  1. ^ Early release notes were not very accurate or thorough, they sometimes included information about features added in a previous release or fail to include information about features added in that release.
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