+++ /dev/null
-
-// huffware script: data cow, by fred huffhines.
-//
-// a data cow is a script that manages a list of text items. it allows an object
-// to offload the memory burden of managing a list of items, since LSL is very tight
-// on memory, even when compiled to mono.
-//
-// this script is licensed by the GPL v3 which is documented at: http://www.gnu.org/licenses/gpl.html
-// do not use it in objects without fully realizing you are implicitly accepting that license.
-//
-
-// global variables.
-
-list the_list;
- // the main list that we manage here. we support adding to it, retrieving it
- // and modifying it via our API.
-list the_names;
- // the short names for each item in our list. we are basically supporting a
- // symbol table data structure here.
-
-// link message API for the data cow library.
-//////////////
-// do not redefine these constants.
-integer DATA_COW_HUFFWARE_ID = 10017;
- // the unique id within the huffware system for the jaunt script to
- // accept commands on. this is used in llMessageLinked as the num parameter.
-string HUFFWARE_PARM_SEPARATOR = "{~~~}";
- // this pattern is an uncommon thing to see in text, so we use it to separate
- // our commands in link messages.
-///string HUFFWARE_ITEM_SEPARATOR = "{|||}";
- // used to separate lists of items from each other when stored inside a parameter.
- // this allows lists to be passed as single string parameters if needed.
-integer REPLY_DISTANCE = 100008; // offset added to service's huffware id in reply IDs.
-//////////////
-//
-string RESET_LIST_COMMAND = "reset_L";
- // flushes out the currently held list. does not send a reply.
-string ADD_ITEM_COMMAND = "add_I";
- // adds items to the list. this is a list of pairs of name/value, where the name is
- // how the item will be looked up from the list, and the value is the contents to be stored.
- // this command has no reply.
-string REMOVE_ITEM_COMMAND = "rm_I";
- // accepts a list of names for items. all the mentioned ones will be removed from the list.
- // this command also has no reply.
-string GET_COW_LENGTH = "get_Lc";
- // returns a single integer which is the length of the cow's list currently.
-string GET_ITEM_COMMAND = "get_I";
- // retrieves the item's contents for a given name. first parm is the name. if there
- // are other parameters, then they are taken as other items to return also.
- // the return data will be pairs of <name, entry> for each of the names in the request
- // that is not empty. note that you can use an integer index by prefacing it with a
- // '#' sign. for example, asking for item "#32" will return index 32 in the list of items.
-string TAGGED_GET_ITEM_COMMAND = "get_T";
- // like get item, except the first parameter is an identifier that the caller wants to
- // use to tag this request. the other parameters are still taken as names. the response
- // will contain the tag as the first item, then the <name, entry> pairs that were found.
-//////////////
-
-// sets up the data cow for business.
-initialize()
-{
- // flush all contents.
- the_list = [];
- the_names = [];
-}
-
-// find a named item in our list, if it exists.
-integer lookup_item(string name)
-{
- integer indy;
- if (llGetSubString(name, 0, 0) == "#") {
- // our special sign for just using an index.
- indy = (integer)llGetSubString(name, 1, -1);
- if ( (indy >= 0) && (indy < llGetListLength(the_names)) ) return indy;
- } else {
- for (indy = 0; indy < llGetListLength(the_names); indy++) {
- if (name == llList2String(the_names, indy)) return indy; // we know where it is now.
- }
- }
- return -1; // never found it.
-}
-
-// places a named item in our list. if there's an existing item with
-// that name, then it's replaced.
-integer global_mem_complained = FALSE;
-add_item(string name, string content)
-{
- if (llGetFreeMemory() < 2000) {
- if (!global_mem_complained) {
- global_mem_complained = TRUE;
- llOwnerSay("out of memory at " + name);
- }
- return;
- }
- integer current = lookup_item(name);
- if (current < 0) {
-//llOwnerSay("new item: " + name);
- // this is a new item.
- the_names += name;
- the_list += content;
- } else {
-//llOwnerSay("reusing slot " + (string)current + " for " + name);
- // this is an old item to be replaced.
- the_list = chop_list(the_list, 0, current - 1)
- + [ content ]
- + chop_list(the_list, current + 1, llGetListLength(the_list) - 1);
- }
-//log_it("mem=" + (string)llGetFreeMemory());
-}
-
-// deletes an existing item if possible. TRUE is returned on success.
-integer remove_item(string name)
-{
- integer indy = lookup_item(name);
- if (indy < 0) return FALSE; // not present.
- // found our sad whackee. we know the name and content should be
- // stored at the exact same index in the two lists.
- the_names = chop_list(the_names, 0, indy - 1)
- + chop_list(the_names, indy + 1, llGetListLength(the_names) - 1);
- the_list = chop_list(the_list, 0, indy - 1)
- + chop_list(the_list, indy + 1, llGetListLength(the_list) - 1);
- return TRUE; // all done here.
-}
-
-// supports our link message API by answering requests from clients.
-handle_link_message(integer sender, integer num, string msg, key id)
-{
- if (num != DATA_COW_HUFFWARE_ID) return; // not for us.
-//log_it("hlm--mem free=" + (string)llGetFreeMemory());
-//log_it("rcvd: " + msg + " " + (string)num + " " + (string)id);
- if (msg == RESET_LIST_COMMAND) {
- initialize();
- } else if (msg == ADD_ITEM_COMMAND) {
- list parms = llParseString2List(id, [HUFFWARE_PARM_SEPARATOR], []);
- integer indy;
- for (indy = 0; indy < llGetListLength(parms); indy += 2) {
- add_item(llList2String(parms, indy), llList2String(parms, indy + 1));
- }
- } else if (msg == REMOVE_ITEM_COMMAND) {
- list parms = llParseString2List(id, [HUFFWARE_PARM_SEPARATOR], []);
- integer indy;
- for (indy = 0; indy < llGetListLength(parms); indy++) {
- remove_item(llList2String(parms, indy));
- }
- } else if (msg == GET_COW_LENGTH) {
- list parms = llParseString2List(id, [HUFFWARE_PARM_SEPARATOR], []);
- string tag = llList2String(parms, 0);
- list to_reply;
- if (tag != "") to_reply = [ tag ];
- to_reply += [ llGetListLength(the_list) ];
- send_reply(LINK_THIS, to_reply, msg);
- } else if ( (msg == GET_ITEM_COMMAND) || (msg == TAGGED_GET_ITEM_COMMAND) ) {
- list parms = llParseString2List(id, [HUFFWARE_PARM_SEPARATOR], []);
- integer indy;
- string tag;
- if (msg == TAGGED_GET_ITEM_COMMAND) {
- // extract the tag, if they want that type of command handling.
- tag = llList2String(parms, 0);
- parms = llDeleteSubList(parms, 0, 0);
- }
- list to_reply;
- // make sure we return the tag if they gave us one.
- if (tag != "") to_reply = [ tag ];
- for (indy = 0; indy < llGetListLength(parms); indy++) {
- // iterate through the parameters and reply about any that we find.
- integer found_posn = lookup_item(llList2String(parms, indy));
- if (found_posn >= 0) {
- // this item did exist.
- to_reply += [ llList2String(the_names, found_posn), llList2String(the_list, found_posn) ];
- }
- }
- send_reply(LINK_THIS, to_reply, msg);
- }
-}
-
-//////////////
-// from hufflets...
-//
-//integer debug_num = 0;
-
-// a debugging output method. can be disabled entirely in one place.
-//log_it(string to_say)
-//{
-// debug_num++;
-// // tell this to the owner.
-// llOwnerSay(llGetScriptName() + "[" + (string)debug_num + "] " + to_say);
-// // say this on open chat, but use an unusual channel.
-//// llSay(108, llGetScriptName() + "[" + (string)debug_num + "] " + to_say);
-//}
-
-// returns the portion of the list between start and end, but only if they are
-// valid compared with the list length. an attempt to use negative start or
-// end values also returns a blank list.
-list chop_list(list to_chop, integer start, integer end)
-{
- integer last_len = llGetListLength(to_chop) - 1;
- if ( (start < 0) || (end < 0) || (start > last_len) || (end > last_len) ) return [];
- return llList2List(to_chop, start, end);
-}
-
-// a simple version of a reply for a command that has been executed. the parameters
-// might contain an outcome or result of the operation that was requested.
-send_reply(integer destination, list parms, string command)
-{
- llMessageLinked(destination, DATA_COW_HUFFWARE_ID + REPLY_DISTANCE,
- command, llDumpList2String(parms, HUFFWARE_PARM_SEPARATOR));
-}
-
-//
-// end hufflets
-//////////////
-
-default
-{
- state_entry() { if (llSubStringIndex(llGetObjectName(), "huffotronic") < 0) state real_default; }
- on_rez(integer parm) { state rerun; }
-}
-state rerun { state_entry() { state default; } }
-
-state real_default
-{
- state_entry() { initialize(); }
-
- link_message(integer sender, integer num, string msg, key id)
- { handle_link_message(sender, num, msg, id); }
-}
-
projects / feisty_meow.git / blobdiff