4 import java.io.IOException;
5 import java.io.InputStream;
6 import org.ibex.util.*;
10 public static final JS[] emptyArgs = new JS[] { };
13 public static InputStream getInputStream(JS j) { return null; }
15 /** returns a Pausable which will restart the context;
16 * expects a value to be pushed onto the stack when unpaused. */
17 public static Pausable pause() throws Pausable.NotPausableException {
18 Interpreter i = Interpreter.current();
23 /** Coerce a JS object into a boolean. */
24 public static boolean toBoolean(JS o) {
25 if(o == null) return false;
26 if(o instanceof JSNumber) return ((JSNumber)o).toBoolean();
27 if(o instanceof JSString) return ((JSString)o).s.length() != 0;
31 //#repeat long/int/double/float toLong/toInt/toDouble/toFloat Long/Integer/Double/Float parseLong/parseInt/parseDouble/parseFloat
32 /** Coerce a JS object to a long. */
33 public static long toLong(JS o) throws JSExn {
34 if(o == null) return 0;
35 if(o instanceof JSNumber) return ((JSNumber)o).toLong();
36 if(o instanceof JSString) return Long.parseLong(o.coerceToString());
37 throw new JSExn("can't coerce a " + o.getClass().getName() + " to a number");
41 /** Coerce a JS object to a String. */
42 public static String toString(JS o) throws JSExn {
43 if(o == null) return "null";
44 return o.coerceToString();
48 public static boolean isInt(JS o) {
49 if(o == null) return true;
50 if(o instanceof JSNumber.I) return true;
51 if(o instanceof JSNumber.B) return false;
52 if(o instanceof JSNumber) {
53 JSNumber n = (JSNumber) o;
54 return n.toInt() == n.toDouble();
56 if(o instanceof JSString) {
57 String s = ((JSString)o).s;
58 for(int i=0;i<s.length();i++)
59 if(s.charAt(i) < '0' || s.charAt(i) > '9') return false;
65 public static boolean isString(JS o) {
66 if(o instanceof JSString) return true;
70 // Instance Methods ////////////////////////////////////////////////////////////////////
72 public final static JS NaN = new JSNumber.D(Double.NaN);
73 public final static JS ZERO = new JSNumber.I(0);
74 public final static JS ONE = new JSNumber.I(1);
75 public final static JS MATH = new JSMath();
77 public static final JS T = new JSNumber.B(true);
78 public static final JS F = new JSNumber.B(false);
80 public static final JS B(boolean b) { return b ? T : F; }
81 public static final JS B(int i) { return i==0 ? F : T; }
83 private static final int CACHE_SIZE = 65536 / 4; // must be a power of two
84 private static final JSString[] stringCache = new JSString[CACHE_SIZE];
85 public static final JS S(String s) {
86 if(s == null) return null;
87 int slot = s.hashCode()&(CACHE_SIZE-1);
88 JSString ret = stringCache[slot];
89 if(ret == null || !ret.s.equals(s)) stringCache[slot] = ret = new JSString(s);
92 public static final JS S(String s, boolean intern) { return intern ? JSString.intern(s) : S(s); }
94 public static final JS N(double d) { return new JSNumber.D(d); }
95 public static final JS N(long l) { return new JSNumber.L(l); }
97 public static final JS N(Number n) {
98 if(n instanceof Integer) return N(n.intValue());
99 if(n instanceof Long) return N(n.longValue());
100 return N(n.doubleValue());
103 private static final JSNumber.I negone = new JSNumber.I(-1);
104 private static final JSNumber.I[] icache = new JSNumber.I[128];
105 static { for (int i=0; i < icache.length; i++) icache[i] = new JSNumber.I(i); }
106 public static final JS N(int i) {
107 return i == -1 ? negone : i >= 0 && i < icache.length ? icache[i] : new JSNumber.I(i);
110 /** Internal method for coercing to String without throwing a JSExn. */
111 public static String str(JS o) {
112 try { return toString(o); }
113 catch(JSExn e) { return o.toString(); }
117 // Static Interpreter Control Methods ///////////////////////////////////////////////////////////////
119 public static JS fromReader(String sourceName, int firstLine, Reader source) throws IOException {
120 return Parser.fromReader(sourceName, firstLine, source); }
123 public static JS cloneWithNewGlobalScope(JS js, JS s) {
124 if(js instanceof JSFunction)
125 return ((JSFunction)js)._cloneWithNewParentScope(new JSScope.Top(s));
130 /** log a message with the current JavaScript sourceName/line */
131 public static void log(Object message) { info(message); }
132 public static void debug(Object message) { Log.debug(Interpreter.getSourceName() + ":" + Interpreter.getLine(), message); }
133 public static void info(Object message) { Log.info(Interpreter.getSourceName() + ":" + Interpreter.getLine(), message); }
134 public static void warn(Object message) { Log.warn(Interpreter.getSourceName() + ":" + Interpreter.getLine(), message); }
135 public static void error(Object message) { Log.error(Interpreter.getSourceName() + ":" + Interpreter.getLine(), message); }