<!-- MHonArc v2.4.4 --> <!--X-Subject: [MUD-Dev] Re: let's call it a spellcraft --> <!--X-From-R13: "F. Oyrknaqre Bbcvry" <cbcvryNfahtuneobe.pbz> --> <!--X-Date: Thu, 24 Sep 1998 08:15:38 -0700 --> <!--X-Message-Id: 199809241515.IAA02072#cashew,snugharbor.com.snugharbor.com --> <!--X-Content-Type: text/plain --> <!--X-Reference: 199809240523.AAA14210@dfw-ix10.ix.netcom.com --> <!--X-Head-End--> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <title>MUD-Dev message, [MUD-Dev] Re: let's call it a spellcraft</title> <!-- meta name="robots" content="noindex,nofollow" --> <link rev="made" href="mailto:popiel#snugharbor,com"> </head> <body background="/backgrounds/paperback.gif" bgcolor="#ffffff" text="#000000" link="#0000FF" alink="#FF0000" vlink="#006000"> <font size="+4" color="#804040"> <strong><em>MUD-Dev<br>mailing list archive</em></strong> </font> <br> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] <br clear=all><hr> <!--X-Body-Begin--> <!--X-User-Header--> <!--X-User-Header-End--> <!--X-TopPNI--> Date: [ <a href="msg01191.html">Previous</a> | <a href="msg01193.html">Next</a> ] Thread: [ <a href="msg01212.html">Previous</a> | <a href="msg01213.html">Next</a> ] Index: [ <A HREF="author.html#01192">Author</A> | <A HREF="#01192">Date</A> | <A HREF="thread.html#01192">Thread</A> ] <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> <H1>[MUD-Dev] Re: let's call it a spellcraft</H1> <HR> <!--X-Subject-Header-End--> <!--X-Head-of-Message--> <UL> <LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> <LI><em>Subject</em>: [MUD-Dev] Re: let's call it a spellcraft </LI> <LI><em>From</em>: "T. Alexander Popiel" <<A HREF="mailto:popiel#snugharbor,com">popiel#snugharbor,com</A>></LI> <LI><em>Date</em>: Thu, 24 Sep 1998 08:15:23 -0600</LI> <LI><em>cc</em>: <A HREF="mailto:popiel#snugharbor,com">popiel#snugharbor,com</A></LI> <LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <PRE> In message: <<A HREF="msg01177.html">199809240523.AAA14210#dfw-ix10,ix.netcom.com</A>> "Jon A. Lambert" <jlsysinc#ix,netcom.com> writes: > >I agree, we should always attempt an implementation in terms 0, 1 >and many(unknown/infinity/X). There are exceptions and instances >where we must pay homage at some level to the failings of our >silicon, but these should be rare and abstracted if possible. > >It begs the question, "Is the fixed dimensional array evil?" I'd tend to say that no, fixed dimensional arrays are not evil, if properly marked. I submit these excerpts from the string table code I mentioned a few posts ago as my defending argument: /* This is a string table implemented as a red-black tree. * * There are a couple of peculiarities about this implementation: * * (1) Parent pointers are not stored. Instead, insertion and * deletion remember the search path used to get to the * current point in the tree, and use that path to determine * parents. * * (2) A usage count is kept on items in the tree; when items * have 127 concurrent uses, they become permanent, and * may never be fully deleted. * * (3) The red/black coloring is stored as the low order bit * in the same byte as the usage count (which takes up * the other 7 bits of that byte). * * (4) The data string is stored directly in the tree node, * instead of hung in a pointer off the node. This means * that the nodes are of variable size. What fun. * * (5) The strings are stored in the table _unaligned_. If * you try to use this for anything other than strings, * expect alignment problems. */ /* This string table is _NOT_ reentrant. If you try to use this * in a multithreaded environment, you will probably get burned. */ /* Various constants. Their import is either bleedingly obvious * or explained below. */ #define ST_MAX_DEPTH 64 /* Here we have a global for the path info, just so we don't * eat tons of stack space. (This code isn't reentrant no * matter where we put this, so might as well save stack.) * The fixed size of this array puts a limit on the maximum * size of the string table... but with ST_MAX_DEPTH == 64, * the tree can hold between 4 billion and 8 quintillion * strings. I don't think capacity is a problem. */ static StrTree *path[ST_MAX_DEPTH]; - Alex </PRE> <!--X-Body-of-Message-End--> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <ul compact><li><strong>Follow-Ups</strong>: <ul> <li><strong><A NAME="01213" HREF="msg01213.html">[MUD-Dev] Let's talk about numbers.</A></strong> <ul compact><li><em>From:</em> "Jon A. Lambert" <jlsysinc#ix,netcom.com></li></ul> </UL></LI></UL> <!--X-Follow-Ups-End--> <!--X-References--> <UL><LI><STRONG>References</STRONG>: <UL> <LI><STRONG><A NAME="01177" HREF="msg01177.html">[MUD-Dev] Re: let's call it a spellcraft</A></STRONG> <UL><LI><EM>From:</EM> "Jon A. Lambert" <jlsysinc#ix,netcom.com></LI></UL></LI> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg01191.html">[MUD-Dev] Re: Marian's Tailor vs. Psychopaths</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg01193.html">[MUD-Dev] Re: META: What are you looking for in this list?</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg01212.html">[MUD-Dev] Let's talk about numbers.</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg01213.html">[MUD-Dev] Let's talk about numbers.</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#01192"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#01192"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> <ul><li>Thread context: <BLOCKQUOTE><UL> <LI><STRONG>[MUD-Dev] Re: let's call it a spellcraft</STRONG>, <EM>(continued)</EM> <ul compact> <ul compact> <ul compact> <ul compact> <ul compact> <LI><strong><A NAME="01185" HREF="msg01185.html">[MUD-Dev] Re: let's call it a spellcraft</A></strong>, Caliban Tiresias Darklock <a href="mailto:caliban#darklock,com">caliban#darklock,com</a>, Thu 24 Sep 1998, 06:24 GMT <UL> <LI><strong><A NAME="01216" HREF="msg01216.html">[MUD-Dev] Let's talk about numbers.</A></strong>, Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Fri 25 Sep 1998, 06:00 GMT </LI> </UL> </LI> <LI><strong><A NAME="01186" HREF="msg01186.html">[MUD-Dev] Re: let's call it a spellcraft</A></strong>, Marc Hernandez <a href="mailto:marc#jb,com">marc#jb,com</a>, Thu 24 Sep 1998, 06:41 GMT <UL> <LI><strong><A NAME="01212" HREF="msg01212.html">[MUD-Dev] Let's talk about numbers.</A></strong>, Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Fri 25 Sep 1998, 05:59 GMT </LI> </UL> </LI> <LI><strong><A NAME="01192" HREF="msg01192.html">[MUD-Dev] Re: let's call it a spellcraft</A></strong>, T. Alexander Popiel <a href="mailto:popiel#snugharbor,com">popiel#snugharbor,com</a>, Thu 24 Sep 1998, 15:15 GMT <UL> <LI><strong><A NAME="01213" HREF="msg01213.html">[MUD-Dev] Let's talk about numbers.</A></strong>, Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Fri 25 Sep 1998, 05:59 GMT <UL> <LI><strong><A NAME="01221" HREF="msg01221.html">[MUD-Dev] Re: Let's talk about numbers.</A></strong>, T. Alexander Popiel <a href="mailto:popiel#snugharbor,com">popiel#snugharbor,com</a>, Fri 25 Sep 1998, 15:03 GMT <UL> <LI><strong><A NAME="01232" HREF="msg01232.html">[MUD-Dev] Re: Let's talk about numbers.</A></strong>, Caliban Tiresias Darklock <a href="mailto:caliban#darklock,com">caliban#darklock,com</a>, Fri 25 Sep 1998, 20:30 GMT <UL> <LI><strong><A NAME="01235" HREF="msg01235.html">[MUD-Dev] Re: Let's talk about numbers.</A></strong>, Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Fri 25 Sep 1998, 22:36 GMT </LI> </UL> </LI> </UL> </LI> </UL> </LI> </UL> </LI> </ul> </ul> </ul> </ul> </ul> </LI> </UL></BLOCKQUOTE> </ul> <hr> <center> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] </center> <hr> </body> </html>