-// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
-package org.ibex.js;
+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache Public Source License 2.0 ("the License").
+// You may not use this file except in compliance with the License.
-import java.io.*;
+package org.ibex.js;
import org.ibex.util.*;
/** A JavaScript function, compiled into bytecode */
-class JSFunction extends JS implements ByteCodes, Tokens, Task {
-
+class JSFunction extends JS.Immutable implements ByteCodes, Tokens, Pausable {
+ private static final JS[] emptyArgs = new JS[0];
// Fields and Accessors ///////////////////////////////////////////////
int size = 0; ///< the number of instruction/argument pairs
JSScope parentScope; ///< the default scope to use as a parent scope when executing this
- Vec formalArgs = new Vec();
- // Public //////////////////////////////////////////////////////////////////////////////
- // FEATURE: make sure that this can only be called from the Scheduler...
- /** if you enqueue a function, it gets invoked in its own pauseable context */
- public void perform() throws JSExn {
- Interpreter i = new Interpreter(this, true, new JSArray());
- i.resume();
- }
+ // Public //////////////////////////////////////////////////////////////////////////////
- /** parse and compile a function */
- public static JSFunction _fromReader(String sourceName, int firstLine, Reader sourceCode) throws IOException {
- JSFunction ret = new JSFunction(sourceName, firstLine, null);
- if (sourceCode == null) return ret;
- Parser p = new Parser(sourceCode, sourceName, firstLine);
- while(true) {
- int s = ret.size;
- p.parseStatement(ret, null);
- if (s == ret.size) break;
- }
- ret.add(-1, LITERAL, null);
- ret.add(-1, RETURN);
+ private Interpreter runner = null;
+ public Object run(Object o) throws JSExn {
+ if (runner == null) runner = new Interpreter(this, true, emptyArgs);
+ Object ret = runner.run(o);
+ if (runner.f == null) runner = null;
return ret;
}
+ public void pause() throws NotPausableException {
+ if (runner == null) throw new NotPausableException();
+ runner.pause();
+ }
public JSFunction _cloneWithNewParentScope(JSScope s) {
JSFunction ret = new JSFunction(sourceName, firstLine, s);
ret.arg = this.arg;
ret.line = this.line;
ret.size = this.size;
- ret.formalArgs = this.formalArgs;
ret.numFormalArgs = this.numFormalArgs;
return ret;
}
- /** Note: code gets run in an <i>unpauseable</i> context. */
- public Object call(Object a0, Object a1, Object a2, Object[] rest, int nargs) throws JSExn {
- JSArray args = new JSArray();
- if (nargs > 0) args.addElement(a0);
- if (nargs > 1) args.addElement(a1);
- if (nargs > 2) args.addElement(a2);
- for(int i=3; i<nargs; i++) args.addElement(rest[i-3]);
- Interpreter cx = new Interpreter(this, false, args);
- return cx.resume();
- }
+ public JS call(JS method, JS[] args) throws JSExn {
+ if (method != null) return super.call(method, args);
+ return (JS)new Interpreter(this, false, args).run(null); }
- public JSScope getParentScope() { return parentScope; }
+ JSScope getParentScope() { return parentScope; }
// Adding and Altering Bytecodes ///////////////////////////////////////////////////
// Debugging //////////////////////////////////////////////////////////////////////
- public String toString() { return "JSFunction [" + sourceName + ":" + firstLine + "]"; }
+ String extendedToString() { return "[" + sourceName + ":" + firstLine + "]"; }
- public String dump() {
+ String dump() { return dump(""); }
+ private String dump(String prefix) {
StringBuffer sb = new StringBuffer(1024);
sb.append("\n" + sourceName + ": " + firstLine + "\n");
for (int i=0; i < size; i++) {
- sb.append(i).append(" (").append(line[i]).append(") :");
+ sb.append(prefix);
+ sb.append(i).append(" (").append(line[i]).append("): ");
if (op[i] < 0) sb.append(bytecodeToString[-op[i]]);
else sb.append(codeToString[op[i]]);
sb.append(" ");
- sb.append(arg[i] == null ? "(no arg)" : arg[i]);
+ sb.append(arg[i] == null ? "(no arg)" : arg[i] instanceof JS ? JSU.str((JS)arg[i]) : arg[i]);
if((op[i] == JF || op[i] == JT || op[i] == JMP) && arg[i] != null && arg[i] instanceof Number) {
sb.append(" jump to ").append(i+((Number) arg[i]).intValue());
} else if(op[i] == TRY) {
int[] jmps = (int[]) arg[i];
sb.append(" catch: ").append(jmps[0] < 0 ? "No catch block" : ""+(i+jmps[0]));
sb.append(" finally: ").append(jmps[1] < 0 ? "No finally block" : ""+(i+jmps[1]));
+ } else if(op[i] == NEWFUNCTION) {
+ sb.append(((JSFunction) arg[i]).dump(prefix + " "));
+ } else if(op[i] == NEWSCOPE) {
+ int n = ((JSNumber)arg[i]).toInt();
+ sb.append(" base: " + (n>>>16) + " size: " + (n&0xffff));
}
sb.append("\n");
}