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PLS.js
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2037 lines (1886 loc) · 62.3 KB
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>EmuLisp Console</title>
<meta name="generator" content="BBEdit 9.6" />
<style type="text/css" title="text/css">
body {
margin: 12px 16px 0 16px;
background-color: #f0ecd0;
}
div#head {
white-space: nowrap;
}
span#presentation {
border: 1px solid gray;
border-radius: 4px;
padding: 4px 12px 4px 12px;
font: 15px Optima;
background-color: white;
}
span#presentation em {
font-size: 18px;
}
img#infosymbol {
position: relative;
top: 5px;
margin: 0 0 0 8px;
cursor: pointer;
}
div#main {
position: relative;
top: 7px;
}
div#dcons {
width: 520px;
}
div#log {
margin: 0;
width: 101.3%;
border: 1px solid gray;
border-bottom: none;
overflow: auto;
background-color: white;
}
div#log pre {
margin: 0 1px 0 1px;
padding: 2px 2px 2px 4px;
}
pre.oldcode {
background-color: #f0f5f7;
cursor: pointer;
}
pre.filedrop {
border-left: 4px solid #c0c5c7;
background-color: #f0f5f7;
}
pre.print {
background-color: #def;
}
pre.println {
background-color: #def;
border-bottom: 1px solid #bcf;
}
pre.result {
background-color: #dfd;
border-bottom: 1px solid #9b9;
}
pre.warning {
border-left: 4px solid #db3;
background-color: #ffa;
}
pre.error {
border-left: 4px solid #f33;
background-color: #fdd;
}
textarea#newcode {
margin: 0 0 4px 0;
width: inherit;
border: 1px solid gray;
padding: 2px 0 0 6px;
font: inherit;
}
span#version {
margin-left: 8px;
font: italic 11px Arial, sans-serif;
}
div#dcons span#controls {
float: right;
}
div#dcons span#controls span {
margin: 0;
border: 1px solid gray;
padding: 2px 4px 2px 4px;
font: 14px monospace;
background-color: white;
}
div#dcons span#controls .nosymbol {
color: black;
cursor: text;
}
div#dcons span#controls .builtin {
color: #00e;
cursor: pointer;
}
div#dcons span#controls .othersymbol {
color: #00e;
cursor: pointer;
background-color: #def;
}
div#dcons input[type='button'] {
}
div#monitor {
position: absolute;
top: 0;
left: 534px;
font: 15px Optima;
}
div#monitor input[type='text'] {
margin: 0 0 4px 0;
width: 300px;
font: 15px monospace;
}
canvas#monView {
border: 1px solid gray;
background-color: white;
}
div#prefs {
visibility: hidden;
position: absolute;
top: 46px;
left: 160px;
border: 2px ridge #999;
background-color: white;
-moz-box-shadow: 4px 4px 8px rgba(0,0,0,0.3);
-webkit-box-shadow: 4px 4px 8px rgba(0,0,0,0.3);
box-shadow: 4px 4px 8px rgba(0,0,0,0.3);
padding: 0 0 2px 0;
font: 14px Optima;
}
p.paneHead {
margin: 0 0 8px 0;
border-bottom: 1px solid #bbb;
background-color: #ddd;
padding: 0 0 1px 0;
}
span.closebox {
position: relative;
margin: 0;
left: 92%;
border: 1px solid #999;
background-color: #f9f9f9;
padding: 0 3px 0 3px;
text-align: center;
font: 10px Arial, sans-serif;
cursor: default;
}
span.closebox:hover {
color: #d22;
}
p.pref {
margin: 0 16px 8px 14px;
}
div#prefs input[type='checkbox'] {
margin: 0 6px 0 0;
}
div#prefs input[type='text'] {
background-color: #ffd;
padding-left: 2px;
}
/* below are the following script sections (in one script tag)
<script src="http://folk.uio.no/jkleiser/pico/emuLisp/src/core.js" type="text/javascript"></script>
<script src="http://folk.uio.no/jkleiser/pico/emuLisp/src/js.js" type="text/javascript"></script>
*/
</style>
<script src="http://folk.uio.no/jkleiser/pico/emuLisp/src/js.js" type="text/javascript"></script>
<script type="text/javascript">
/* 26nov10jk
* (c) Jon Kleiser
* http://folk.uio.no/jkleiser/pico/emuLisp/src/core.js
*/
var BOXNAT_EXP = "Boxed native object expected",
BOOL_EXP = "Boolean expected", CELL_EXP = "Cell expected", LIST_EXP = "List expected",
NUM_EXP = "Number expected", SYM_EXP = "Symbol expected", VAR_EXP = "Variable expected",
EXEC_OR_NUM_EXP = "Executable or Number expected",
BAD_ARG = "Bad argument", BAD_DOT = "Bad dotted pair", BAD_INPUT = "Bad input", DIV_0 = "Div/0",
NOT_MAK = "Not making", PROT_SYM = "Protected symbol", UNDEF = "Undefined",
JS_CTORNAME_EXP = "Constructor name expected", JS_RESERVED = "Reserved word";
function getFileSync(fileUrl) {
var req = new XMLHttpRequest();
req.open("GET", fileUrl, false); // synchronous
req.overrideMimeType("text/plain; charset=utf-8");
req.send(null);
if (req.status == 0) {
return req.responseText;
}
throw new Error("XMLHttpRequest status: " + req.status);
}
var NILTYPE = 0, NUMBERTYPE = 1, SYMBOLTYPE = 2, CELLTYPE = 3, TRUETYPE = 4;
Number.prototype.TYPEVAL = NUMBERTYPE;
function lispToStr(x) {
//if (!confirm("lispToStr: " + x.toString() + ", " + x.TYPEVAL)) throw new Error("lispToStr aborted");
return x.toString();
}
function unknown(x) {
if (!confirm("Unknown Lisp type: " + x)) throw new Error("unknown aborted");
return "???";
}
function valueToStr(x) {
//if (!confirm("valueToStr " + lispToStr(x))) throw new Error("valueToStr aborted");
return (x instanceof Number) ? x.toString() :
(x instanceof Symbol) ? x.toValueString() :
(x instanceof Cell) ? x.toValueString() : unknown(x);
}
function Cell(car, cdr) {
this.car = car;
this.cdr = cdr;
}
Cell.prototype.TYPEVAL = CELLTYPE;
Cell.prototype.getVal = function() {
return this.car;
}
Cell.prototype.setVal = function(val) {
this.car = val;
}
Cell.prototype.toString = function() {
if (this.car === QUOTE) return "'" + lispToStr(this.cdr);
var arr = [], c = this;
do {
arr.push(lispToStr(c.car));
c = c.cdr;
//if (!confirm("Cell.toString: " + lispToStr(c.car))) throw new Error("Cell.toString aborted");
if (c === this) { arr.push("."); c = NIL; } // why didn't break work here?
} while (c instanceof Cell);
if (c !== NIL) {
arr.push(".", lispToStr(c)); // last Cell was dotted
}
return "(" + arr.join(" ") + ")";
}
Cell.prototype.toValueString = function() {
var str = "", c = this;
do {
str += valueToStr(c.car);
c = c.cdr;
} while (c instanceof Cell);
if (c !== NIL) {
str += valueToStr(c); // last Cell was dotted
}
return str;
}
function Symbol(name, val) {
this.name = name;
this.trans = false;
this.cdr = (val === undefined) ? NIL : val;
this.props = NIL;
}
function newTransSymbol(name) {
var ts = new Symbol(name);
ts.trans = true;
ts.cdr = ts;
return ts;
}
// Creates and returns a new anonymous symbol
function box(val) {
var ts = new Symbol(null, val);
ts.trans = true;
return ts;
}
function boxNativeObject(obj) {
var ts = newTransSymbol(null);
ts.obj = obj;
return ts;
}
Symbol.prototype.TYPEVAL = SYMBOLTYPE;
Symbol.prototype.getVal = function() {
return this.cdr;
}
Symbol.prototype.valueOf = function() {
return this.name;
}
Symbol.prototype.setVal = function(val) {
if (this.lock) throw new Error(newErrMsg(PROT_SYM, this));
this.cdr = val;
}
// Internal symbol names can consist of any printable (non-whitespace) character,
// except for the following meta characters: " ' ( ) , [ ] ` ~ { }
// It is possible, though, to include these special characters into symbol names
// by escaping them with a backslash '\'.
Symbol.prototype.escName = function() {
var eName = this.name.replace(/\\/g, "\\\\");
eName = eName.replace(/\^/g, "Error! Hyperlink reference not valid.");
eName = eName.replace(/\t/g, "^I");
eName = eName.replace(/\r/g, "^M");
eName = eName.replace(/\n/g, "^J");
//if (eName != this.name) alert("Symbol.escName: " + this.name + " -> " + eName);
return eName;
}
Symbol.prototype.noName = function() {
return (this.obj !== undefined) ? "$" + typeof this.obj : "$*";
}
Symbol.prototype.toString = function() {
return this.trans ? (this.name != null) ? ('"' + this.escName() + '"') : this.noName() : this.name;
}
Symbol.prototype.toValueString = function() {
return (this === NIL) ? "" : (this.name != null) ? this.name : this.noName();
}
Symbol.prototype.pushValue = function(val) {
if (this.stack === undefined) this.stack = [];
this.stack.push(this.cdr);
this.cdr = val;
}
Symbol.prototype.popValue = function() {
var pv = this.cdr;
this.cdr = this.stack.pop();
//if (this.stack.length === 0) delete this.stack;
return pv;
}
function getSymbol(name, editMode) {
if (name in gEmptyObj) throw new Error(newErrMsg(JS_RESERVED, name));
var s = gSym[name];
if (s === undefined) {
s = new Symbol(name, NIL);
if (! editMode) gSym[name] = s;
}
return s;
}
function setSymbolValue(s, val) {
if (!(s instanceof Symbol)) throw new Error(newErrMsg(VAR_EXP, s));
s.setVal(val);
}
function Source(text, chars) {
this.src = text;
// character limitation for symbols
if (chars instanceof Symbol) {
this.charset = chars.valueOf();
} else if (typeof chars == "string") {
//alert("Source2: " + chars);
this.charset = chars;
}
this.pos = 0;
this.trace = null;
}
Source.prototype.CLOSEPAREN = -1;
Source.prototype.CLOSESYM = -2;
Source.prototype.QUOTE2 = -3;
Source.prototype.EOF = null;
Source.prototype.unescMap = {I: "\t", i: "\t", J: "\n", j: "\n", M: "\r", m: "\r"};
Source.prototype.getNextSignificantChar = function() {
while (this.pos < this.src.length) {
while (this.src.charAt(this.pos) == "#") {
var ch;
do { ch = this.src.charAt(this.pos++); } while ((ch != "\n") && (this.pos < this.src.length));
}
if (this.src.charAt(this.pos) == "\\") this.pos++;
if (" \t\r\n".indexOf(this.src.charAt(this.pos)) == -1) return this.src.charAt(this.pos++);
this.pos++;
}
return this.EOF;
}
Source.prototype.getNextStringChar = function() {
while (this.pos < this.src.length) {
var ch = this.src.charAt(this.pos++);
if (ch == "\"") return this.QUOTE2;
if (ch == "\\") return this.src.charAt(this.pos++);
if (ch != "^") return ch;
ch = this.unescMap[this.src.charAt(this.pos++)];
if (ch != null) return ch;
}
return this.EOF;
}
Source.prototype.getNextSymbolChar = function() {
if (" \t\r\n('\"".indexOf(this.src.charAt(this.pos)) >= 0) return this.CLOSESYM;
var ch = this.src.charAt(this.pos++);
if (ch == ")") return this.CLOSEPAREN;
if (ch == "\\") return this.src.charAt(this.pos++);
return ch;
}
Source.prototype.withTrace = function() {
this.trace = [];
return this;
}
Source.prototype.traceItemEnd = function(item) {
if (this.trace) this.trace.push({item: item, endPos: this.pos});
}
Source.prototype.getItemBeforePos = function(endPos) {
for (var i=this.trace.length-1; i>=0; i--) {
var t = this.trace[i];
if ((t.endPos - t.item.toString().length) <= endPos) return {item: t.item, tInd: i};
}
return null;
}
Source.prototype.getSymbolBeforePos = function(endPos) {
for (var i=this.trace.length-1; i>=0; i--) {
var t = this.trace[i];
if (((t.endPos - t.item.toString().length) <= endPos) &&
(t.item instanceof Symbol) && gSym[t.item.name]) return {item: t.item, tInd: i};
}
return null;
}
var NIL = new Symbol("NIL"); NIL.car = NIL; NIL.cdr = NIL; NIL.props = NIL;
NIL.lock = true; NIL.TYPEVAL = NILTYPE; NIL.bool = false;
var T = new Symbol("T"); T.cdr = T; T.lock = true; T.TYPEVAL = TRUETYPE; T.bool = true;
var A1 = new Symbol("@", NIL), A2 = new Symbol("@@", NIL), A3 = new Symbol("@@@", NIL);
var ZERO = new Number(0), ONE = new Number(1);
var gSym = {NIL: NIL, T: T, "@": A1, "@@": A2, "@@@": A3}; // dictionary/index for internal symbols
var gTrans = {}; // dictionary/index for transient symbols (strings)
var gEmptyObj = {};
var gParseCache = {};
var mk = []; // 'make' stack
var evFrames = NIL;
var gTrcIndent = "";
var startupMillis = (new Date()).getTime();
function mkNew() { mk.unshift({h: NIL, t: NIL}); }
function linkc(c) {
if (mk.length === 0) throw new Error(newErrMsg(NOT_MAK));
c = (c !== NIL) ? evalArgs(c) : new Cell(NIL, NIL);
if (mk[0].h === NIL) { mk[0].h = c; } else { mk[0].t.cdr = c; }
while (c.cdr !== NIL) { c = c.cdr; }; mk[0].t = c; return c.car;
}
function link(x) {
if (mk.length === 0) throw new Error(newErrMsg(NOT_MAK));
var c = new Cell(x, NIL);
if (mk[0].h === NIL) { mk[0].h = c; } else { mk[0].t.cdr = c; }
mk[0].t = c; return x;
}
function mkResult() { return mk.shift().h; }
function getString(str, editMode) {
var s = (str in gEmptyObj) ? undefined : gTrans[str];
if (s === undefined) {
s = newTransSymbol(str);
if (! (editMode || (str in gEmptyObj))) gTrans[str] = s;
}
return s;
}
function newErrMsg(msg, badValue) {
getSymbol("*Msg").setVal(newTransSymbol(msg));
return (badValue === undefined) ? msg : lispToStr(badValue) + " -- " + msg;
}
function deFn(name, jsFn) {
if (name in gEmptyObj) throw new Error(newErrMsg(JS_RESERVED, name));
var sym = new Symbol(name, jsFn);
gSym[name] = sym;
}
function aTrue(val) { if (val !== NIL) { A1.pushValue(val); return true; } else return false; }
function aPop(val) { A1.popValue(); return val; }
function car(c) { if (c.car) return c.car; else throw new Error(newErrMsg(LIST_EXP)); }
function cdr(c) { if ((c instanceof Cell) || (c === NIL)) return c.cdr;
else throw new Error(newErrMsg(LIST_EXP)); }
function numeric(val) {
if (val instanceof Number) return val;
throw new Error(newErrMsg(NUM_EXP, val));
}
function nth(lst, n) {
if (lst instanceof Cell) {
if (n <= 0) return NIL;
while ((lst !== NIL) && (--n > 0)) { lst = lst.cdr; }
}
return lst;
}
function getAlg(c) {
//alert("getAlg: " + lispToStr(c));
var s = c.car; c = c.cdr;
while (c instanceof Cell) {
var k = c.car;
if (s instanceof Symbol) {
if (eqVal(k, ZERO)) {
s = s.getVal();
} else {
var pLst = s.props, p = NIL, pk, pv;
while (pLst !== NIL) {
var pc = pLst.car;
if (pc instanceof Cell) { pk = pc.cdr; pv = pc.car; } else { pk = pc; pv = T; }
//if (!confirm("getAlg: " + lispToStr(pc) + ", " + lispToStr(pk) + ", " + lispToStr(pv))) throw new Error("getAlg aborted");
if (pk === k) { p = pv; break; }
pLst = pLst.cdr;
}
s = p; // the symbol or list to use in the next step
}
} else if (s instanceof Cell) {
if (k instanceof Number) {
if (k >= 0) {
s = nth(s, k).car;
} else {
do { s = s.cdr; } while ((s !== NIL) && (++k < 0));
}
}
} else throw new Error(newErrMsg(SYM_EXP));
c = c.cdr;
}
return s;
}
function prog(c) {
var v = NIL; while (c instanceof Cell) { v = evalLisp(c.car); c = c.cdr; }; return v;
}
function iter(c) {
var v = NIL;
while (c instanceof Cell) {
var cv = c.car, cond = false, cMatch = false;
if (cv instanceof Cell) {
if (cond = (cv.car === NIL)) {
cMatch = (evalLisp(cv.cdr.car) === NIL);
} else if (cond = (cv.car === T)) {
cMatch = aTrue(evalLisp(cv.cdr.car));
}
}
if (cond) {
if (cMatch) {
v = prog(cv.cdr.cdr);
if (cv.car === T) aPop(v);
return {v: v, m: true};
}
} else v = evalLisp(cv);
c = c.cdr;
}
return {v: v, m: false};
}
function div(c, divFn) {
var t = evalLisp(c.car);
if (t === NIL) return NIL;
t = numeric(t);
while (c.cdr !== NIL) {
c = c.cdr;
var v = evalLisp(c.car); if (v === NIL) return NIL;
if (numeric(v) == 0) throw new Error(newErrMsg(DIV_0));
t = divFn(t, v);
}
return new Number(t);
}
function eqVal(a, b) {
//alert("eqVal() " + a + ", " + b);
if (a.TYPEVAL === b.TYPEVAL) {
if (a === b) return true;
if (a.TYPEVAL === CELLTYPE) {
return eqVal(a.car, b.car) ? eqVal(a.cdr, b.cdr) : false;
}
return (a.valueOf() == b.valueOf()); // Number or Symbol
}
return false;
}
function ltVal(a, b) {
if (a.TYPEVAL === b.TYPEVAL) {
if (a === b) return false;
if (a.TYPEVAL === CELLTYPE) {
return eqVal(a.car, b.car) ? ltVal(a.cdr, b.cdr) : ltVal(a.car, b.car);
}
return a.valueOf() < b.valueOf(); // Number or Symbol
}
return a.TYPEVAL < b.TYPEVAL;
}
function idxLookup(owner, v) {
var tree = owner.getVal();
if (tree === NIL) return NIL;
while (!eqVal(v, tree.car)) {
if (tree.cdr === NIL) return NIL;
if (ltVal(v, tree.car)) return idxLookup(tree.cdr, v);
tree = tree.cdr;
if (tree.cdr === NIL) return NIL;
tree = tree.cdr;
}
return tree;
}
function idxInsert(owner, v) {
var tree = owner.getVal();
if (tree === NIL) { owner.setVal(new Cell(v, NIL)); return NIL; }
while (!eqVal(v, tree.car)) {
if (tree.cdr === NIL) tree.cdr = new Cell(NIL, NIL);
if (ltVal(v, tree.car)) return idxInsert(tree.cdr, v);
tree = tree.cdr;
if (tree.cdr === NIL) { tree.cdr = new Cell(v, NIL); return NIL; }
tree = tree.cdr;
//if (!confirm("idxInsert: " + lispToStr(tree))) throw new Error("idxInsert aborted");
}
return tree;
}
function idxDelete(owner, v) {
var tree = owner.getVal(), pre = NIL;
if (tree === NIL) return NIL;
while (!eqVal(v, tree.car)) {
if (tree.cdr === NIL) return NIL;
if (ltVal(v, tree.car)) return idxDelete(tree.cdr, v);
pre = tree; tree = tree.cdr;
if (tree.cdr === NIL) return NIL;
pre = tree; tree = tree.cdr;
//if (!confirm("idxDelete: " + lispToStr(tree))) throw new Error("idxDelete aborted");
}
// tree.car is the value to delete
//var bbc = null; // cell with "big brother" to replace tree.car, if needed
if (tree.cdr.car !== NIL) {
// There are lesser values that need a new "big brother".
if (tree.cdr.cdr !== NIL) {
var pbc = tree.cdr, bbc = pbc.cdr;
if (bbc.cdr.car !== NIL) {
// There are several "big brother" candidates, get the smallest ...
do { pbc = bbc; bbc = bbc.cdr.car; } while (bbc.cdr.car !== NIL);
pbc.cdr.car = NIL; // brother's old cell replaced by NIL
} else {
// Only one candidate. Cut it and following NIL from list ...
pbc.cdr = pbc.cdr.cdr.cdr;
}
//alert("idxDelete: " + lispToStr(bbc));
tree.car = bbc.car; // value to delete replaced by "big brother"
} else {
// Must promote lesser values
if (pre === NIL) {
owner.setVal(tree.cdr.car);
} else {
pre.cdr = tree.cdr.car;
}
}
} else {
// No lesser values following value to delete
if (pre === NIL) {
owner.setVal(tree.cdr.cdr);
} else {
pre.cdr = tree.cdr.cdr;
}
}
return tree;
}
function idxLinkSorted(tree) {
while (tree !== NIL)
{ idxLinkSorted(tree.cdr.car); link(tree.car); tree = tree.cdr.cdr; }
}
/*
* If 'evaluate' is true, each top level expression will be evaluated, and the result
* of the last evaluation ('evRes') will be returned. A top level NIL or equivalent
* will terminate further parsing.
* If 'evaluate' is false/undefined, the source at the current level will be parsed,
* and a corresponding tree of cells will be returned (through the 'cdr' at the bottom).
* If 'editMode' is true, parsed symbols will not be inserted into the dictionaries.
*/
function parseList(src, evaluate, editMode) {
var ch, s, dotPos = 0, quotes = 0, items = [], cdr = NIL, evRes = NIL, circEnd = null;
do {
ch = src.getNextSignificantChar();
if (ch == "'") {
quotes++;
} else if (ch == ")") {
break;
} else if ((ch == ".") && (items.length > 0)) {
if (dotPos > 0) throw new Error(newErrMsg(BAD_DOT,
"(" + lispToStr(items[items.length-1]) + " . \\.)"));
dotPos = items.length;
} else if (ch !== src.EOF) {
var item;
if (ch == "(") {
var tmp = parseList(src, false, editMode);
if (evaluate && (tmp !== NIL)) evRes = evalLisp(tmp);
item = tmp;
} else if (ch == "\"") {
s = "";
while (typeof (ch = src.getNextStringChar()) == "string") s += ch;
item = (s == "") ? NIL : getString(s, editMode);
src.traceItemEnd(item); // in case we would like to know item's position
} else {
s = ch;
while (typeof (ch = src.getNextSymbolChar()) == "string") s += ch;
item = isNaN(s) ? getSymbol(s, editMode) : new Number(s);
src.traceItemEnd(item); // in case we would like to know item's position
}
if (evaluate && (item === NIL)) return evRes;
if ((dotPos > 0) && (items.length > dotPos)) throw new Error(newErrMsg(BAD_DOT));
// TODO: provide a 'badValue' param for newErrMsg(BAD_DOT) above. Case: (1 (2 3) . 4 5)
while (quotes > 0) { item = new Cell(QUOTE, item); quotes--; }
items.push(item);
}
} while ((ch !== src.CLOSEPAREN) && (ch !== src.EOF));
if (evaluate) return evRes;
if (dotPos > 0) {
if (dotPos == items.length) {
cdr = new Cell(items.pop(), cdr);
circEnd = cdr; // last cell in circular (x y z .) notation
} else { cdr = items.pop(); } // normal dot notation
}
while (items.length > 0) cdr = new Cell(items.pop(), cdr);
if (circEnd != null) circEnd.cdr = cdr;
return cdr;
}
function cachedTextParse(str) {
var lst = gParseCache[str];
if (lst === undefined) {
lst = parseList(new Source(str));
gParseCache[str] = lst;
}
return lst;
}
function unevalArgs(lst) {
// Putting elements of lst into anonymous symbols
mkNew(); while (lst !== NIL) { link(box(lst.car)); lst = lst.cdr; }
return mkResult();
}
function applyFn(rawFn, lst, more) {
if (more !== NIL) {
mkNew(); do { link(evalLisp(more.car)); more = more.cdr; } while (more !== NIL);
mk[0].t.cdr = lst; lst = mkResult();
}
var fn = evalLisp(rawFn); if (! (fn instanceof Symbol)) fn = box(fn);
return evalLisp(new Cell(fn, unevalArgs(lst)));
}
deFn("apply", function(c) { return applyFn(c.car, evalLisp(c.cdr.car), c.cdr.cdr); });
deFn("arg", function(c) { var n = 0, f = evFrames.car;
if (c !== NIL) {
n = Math.round(numeric(evalLisp(c.car))); if (n < 1) return NIL;
}
while (n-- > 0) f = f.cdr;
return f.car;
});
deFn("args", function(c) { return (evFrames.car.cdr === NIL) ? NIL : T; });
deFn("bench", function(c) { var t0 = (new Date()).getTime(), r = prog(c);
_stdPrint(((new Date()).getTime() - t0) / 1000 + " sec\n"); return r;
});
deFn("box", function(c) { return box(evalLisp(c.car)); });
deFn("caar", function(c) { return car(car(evalLisp(c.car))); });
deFn("caddr", function(c) { return car(cdr(cdr(evalLisp(c.car)))); });
deFn("cadr", function(c) { return car(cdr(evalLisp(c.car))); });
deFn("car", function(c) { return car(evalLisp(c.car)); });
deFn("cdar", function(c) { return cdr(car(evalLisp(c.car))); });
deFn("cddr", function(c) { return cdr(cdr(evalLisp(c.car))); });
deFn("cdr", function(c) { return cdr(evalLisp(c.car)); });
deFn("chop", function(c) { var cv = evalLisp(c.car);
if ((cv === NIL) || (cv instanceof Cell)) return cv;
var s = (cv instanceof Symbol) ? cv.valueOf() : cv.toString();
if (s === null) return NIL;
var arr = s.split(""), v = NIL;
while (arr.length > 0) v = new Cell(newTransSymbol(arr.pop()), v);
return v;
});
deFn("cond", function(c) {
while (c.car instanceof Cell) {
if (aTrue(evalLisp(c.car.car))) return aPop(prog(c.car.cdr));
c = c.cdr;
}
return NIL;
});
deFn("cons", function(c) { var r = new Cell(evalLisp(c.car), evalLisp(c.cdr.car)), t = r;
c = c.cdr.cdr;
while (c !== NIL) { var d = new Cell(t.cdr, evalLisp(c.car)); t.cdr = d; t = d; c = c.cdr; }
return r;
});
deFn("de", function(c) { var old = c.car.getVal();
setSymbolValue(c.car, c.cdr);
if ((old !== NIL) && !eqVal(c.cdr, old)) _warn("# " + c.car.valueOf() + " redefined");
return c.car;
});
deFn("dec", function(c) {
if (c === NIL) return NIL;
var ns = evalLisp(c.car);
if (ns instanceof Number) return new Number(ns - 1);
var v = new Number(ns.getVal() - ((c.cdr !== NIL) ? numeric(evalLisp(c.cdr.car)) : 1));
ns.setVal(v); return v;
});
deFn("delete", function(c) { var a = evalLisp(c.car), lst = evalLisp(c.cdr.car);
if (!(lst instanceof Cell)) return lst;
if (eqVal(a, lst.car)) return lst.cdr;
mkNew(); link(lst.car); lst = lst.cdr;
while (lst instanceof Cell) {
if (eqVal(a, lst.car)) { mk[0].t.cdr = lst.cdr; return mkResult(); }
link(lst.car); lst = lst.cdr;
}
mk[0].t.cdr = lst; // taking care of dotted tail
return mkResult();
});
deFn("do", function(c) {
var n = evalLisp(c.car);
if (n === NIL) return NIL;
var step = 1, b = c.cdr, v = NIL;
if (n === T) { n = 1; step = 0; }
for (var i=1; i<=n; i+=step) {
var r = iter(b); v = r.v; if (r.m) break;
}
return v;
});
deFn("eval", function(c) { return evalLisp(evalLisp(c.car)); }); // TODO: binding env. offset cnt
deFn("fin", function(c) { c = evalLisp(c.car); while (c instanceof Cell) { c = c.cdr; }; return c; });
deFn("for", function(c) {
var s = null, s2 = null, v = NIL;
if (c.car instanceof Symbol) {
s = c.car;
} else if (c.car.cdr instanceof Symbol) {
s2 = c.car.car; s = c.car.cdr;
}
if (s != null) {
s.pushValue(NIL); if (s2 != null) s2.pushValue(ZERO);
var nl = evalLisp(c.cdr.car), b = c.cdr.cdr, i = 0;
if (nl instanceof Number) {
//alert("for: 1st form"); // (for I 3 (js:confirm I))
while (++i <= nl) {
s.setVal(new Number(i));
var r = iter(b); v = r.v; if (r.m) break;
}
} else {
//alert("for: 2nd form"); // (for (I . X) (22 33 44) (js:confirm (+ I X)) (+ I X))
while (nl instanceof Cell) {
s.setVal(nl.car); if (s2 != null) s2.setVal(new Number(++i));
var r = iter(b); v = r.v; if (r.m) break;
nl = nl.cdr;
}
}
} else {
//alert("for: 3rd form");
if (c.car.car instanceof Symbol) {
s = c.car.car;
} else {
s2 = c.car.car.car; s = c.car.car.cdr;
}
s.pushValue(evalLisp(c.car.cdr.car)); if (s2 != null) s2.pushValue(ZERO);
var a2p = c.car.cdr.cdr, a2 = a2p.car, b = c.cdr, i = 0;
var p = (a2p.cdr instanceof Cell) ? a2p.cdr.car : null;
while (evalLisp(a2) !== NIL) {
if (s2 != null) s2.setVal(new Number(++i));
var r = iter(b); v = r.v; if (r.m) break;
if (p != null) s.setVal(evalLisp(p));
}
}
s.popValue(); if (s2 != null) s2.popValue();
return v;
});
deFn("get", function(c) { return getAlg(evalArgs(c)); });
deFn("getl", function(c) { var s = getAlg(evalArgs(c));
if (s instanceof Symbol) return s.props;
throw new Error(newErrMsg(SYM_EXP, s));
});
deFn("idx", function(c) { var s = evalLisp(c.car);
if (!(s instanceof Symbol)) return NIL;
if (c.cdr === NIL) { mkNew(); idxLinkSorted(s.getVal()); return mkResult(); }
var a = evalLisp(c.cdr.car);
if (c.cdr.cdr === NIL) return idxLookup(s, a);
return (evalLisp(c.cdr.cdr.car) === NIL) ? idxDelete(s, a) : idxInsert(s, a);
});
deFn("if", function(c) { return aTrue(evalLisp(c.car)) ? aPop(evalLisp(c.cdr.car)) : prog(c.cdr.cdr); });
deFn("ifn", function(c) { return aTrue(evalLisp(c.car)) ? aPop(prog(c.cdr.cdr)) : evalLisp(c.cdr.car); });
deFn("inc", function(c) {
if (c === NIL) return NIL;
var ns = evalLisp(c.car);
if (ns instanceof Number) return new Number(ns + 1);
var v = new Number(ns.getVal() + ((c.cdr !== NIL) ? numeric(evalLisp(c.cdr.car)) : 1));
ns.setVal(v); return v;
});
deFn("length", function(c) { var cv = evalLisp(c.car), v = 0;
if (cv instanceof Number) { v = cv.toString().length; }
else if (cv instanceof Symbol) { v = cv.lock ? cv.toValueString().length :
(cv.name === null) ? 0 : cv.name.length; }
else if (cv instanceof Cell) { var cs = cv;
while (cs !== NIL) { v++; cs = cs.cdr; if (cs === cv) return T; }}
return new Number(v);
});
deFn("let", function(c) {
var symArr = [], p = c.cdr;
if (c.car instanceof Symbol) {
if (c.car !== NIL) {
c.car.pushValue(evalLisp(c.cdr.car)); symArr.push(c.car); p = c.cdr.cdr;
}
} else if (c.car instanceof Cell) {
var sv = c.car;
while (sv !== NIL) {
sv.car.pushValue(evalLisp(sv.cdr.car)); symArr.push(sv.car); sv = sv.cdr.cdr;
}
}
var v = prog(p);
while (symArr.length > 0) { symArr.pop().popValue(); }
return v;
});
deFn("link", linkc);
deFn("list", function(c) { return (c !== NIL) ? evalArgs(c) : new Cell(NIL, NIL); });
deFn("load", function(c) { var r = NIL;
while (c instanceof Cell) {
var cv = evalLisp(c.car);
if (cv instanceof Symbol) {
var f = cv.toValueString();
if (f.charAt(0) == "-") {
r = parseList(new Source("(" + f.substring(1) + ")"), true);
} else {
r = (f.match(/\.js$/)) ? loadJavaScript(f) : loadLisp(f);
}
}
c = c.cdr;
}
return r;
});
deFn("loop", function(c) {
var v = NIL; while (true) { var r = iter(c); v = r.v; if (r.m) break; }; return v;
});
deFn("make", function(c) { mkNew(); prog(c); return mkResult(); });
deFn("mapc", function(c) { var r = NIL, fn = evalLisp(c.car), ci = evalArgs(c.cdr);
if (! (fn instanceof Symbol)) fn = box(fn);
while (ci.car !== NIL) { var cj = ci; mkNew();
while (cj !== NIL) { link(cj.car.car); cj.car = cj.car.cdr; cj = cj.cdr; }
r = evalLisp(new Cell(fn, unevalArgs(mkResult())));
}
return r;
});
deFn("mapcar", function(c) { var fn = evalLisp(c.car), ci = evalArgs(c.cdr);
if (! (fn instanceof Symbol)) fn = box(fn);
mkNew();
while (ci.car !== NIL) { var cj = ci; mkNew();
//if (!confirm(lispToStr(cj))) throw new Error("mapcar aborted");
while (cj !== NIL) { link(cj.car.car); cj.car = cj.car.cdr; cj = cj.cdr; }
link(evalLisp(new Cell(fn, unevalArgs(mkResult()))));
}
return mkResult();
});
deFn("next", function(c) { evFrames.car = evFrames.car.cdr; return evFrames.car.car; });
deFn("not", function(c) { return (evalLisp(c.car) === NIL) ? T : NIL; });
deFn("nth", function(c) { var lst = evalArgs(c); c = lst.cdr;
do { lst = nth(lst.car, numeric(c.car)); c = c.cdr; } while(c !== NIL); return lst; });
// pack has no support for circular lists, same as in PicoLisp
deFn("pack", function(c) { return (c !== NIL) ? newTransSymbol(valueToStr(evalArgs(c))) : NIL; });
deFn("pass", function(c) { return applyFn(c.car, evFrames.car.cdr, c.cdr); });
deFn("pop", function(c) { var cv = evalLisp(c.car);
if (cv.getVal) {
var v = cv.getVal();
if (v instanceof Cell) { cv.setVal(v.cdr); return v.car; }
if (v === NIL) return NIL;
if (cv instanceof Cell) return cv.car;
}
throw new Error(newErrMsg(VAR_EXP, cv));
});
deFn("prin", function(c) {
c = evalArgs(c); _stdPrint(c.toValueString());
while (c.cdr !== NIL) { c = c.cdr; }; return c.car;
});
deFn("prinl", function(c) {
c = evalArgs(c); _stdPrint(c.toValueString() + "\n");
while (c.cdr !== NIL) { c = c.cdr; }; return c.car;
});
function printx(c, x) { var arr = [];
c = evalArgs(c); arr.push(lispToStr(c.car));
while (c.cdr !== NIL) { c = c.cdr; arr.push(lispToStr(c.car)); }
_stdPrint(arr.join(" ") + x); return c.car;
}