From 3fce52759e3e8ad93a4ac224b10882d2e7901d4a Mon Sep 17 00:00:00 2001
From: brian <brian@xwt.org>
Date: Fri, 30 Jan 2004 07:03:32 +0000
Subject: [PATCH] 2003/07/07 04:40:50

darcs-hash:20040130070332-aa32f-c813b9758abfdd1a81f75c91604894418d601121.gz
---
 src/org/xwt/js/GlobalScopeImpl.java |  120 +++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 src/org/xwt/js/GlobalScopeImpl.java

diff --git a/src/org/xwt/js/GlobalScopeImpl.java b/src/org/xwt/js/GlobalScopeImpl.java
new file mode 100644
index 0000000..e9b5680
--- /dev/null
+++ b/src/org/xwt/js/GlobalScopeImpl.java
@@ -0,0 +1,120 @@
+package org.xwt.js;
+
+class GlobalScopeImpl extends JS.Scope {
+    private final static Double NaN = new Double(Double.NaN);
+    private final static Double POSITIVE_INFINITY = new Double(Double.POSITIVE_INFINITY);
+    
+    public GlobalScopeImpl(JS.Scope parent) {
+        super(parent);
+    }
+    public Object get(Object key) {
+        if(key.equals("NaN")) return NaN;
+        if(key.equals("Infinity")) return POSITIVE_INFINITY;
+        if(key.equals("undefined")) return null;
+        return super.get(key);
+    }
+    public Object callMethod(Object method, JS.Array args, boolean checkOnly) {
+        if(method.equals("parseInt")) {
+            if(checkOnly) return Boolean.TRUE;
+            return parseInt(args);
+        } else if(method.equals("parseFloat")) {
+            if(checkOnly) return Boolean.TRUE;
+            return parseFloat(args);
+        } else if(method.equals("isNaN")) {
+            if(checkOnly) return Boolean.TRUE;
+            return isNaN(args);
+        } else if(method.equals("isFinite")) {
+            if(checkOnly) return Boolean.TRUE;
+            return isFinite(args);
+        } else if(method.equals("decodeURI")) {
+            if(checkOnly) return Boolean.TRUE;
+            return decodeURI(args);
+        } else if(method.equals("decodeURIComponent")) {
+            if(checkOnly) return Boolean.TRUE;
+            return decodeURIComponent(args);
+        } else if(method.equals("encodeURI")) {
+            if(checkOnly) return Boolean.TRUE;
+            return encodeURI(args);
+        } else if(method.equals("encodeURIComponent")) {
+            if(checkOnly) return Boolean.TRUE;
+            return encodeURIComponent(args);
+        }
+        return super.callMethod(method,args,checkOnly);
+    }
+    private Object parseInt(JS.Array args) {
+        String s = args.length() > 0 ? args.elementAt(0).toString() : "";
+        int radix = args.length() > 1 ? toInt(args.elementAt(1)) : 0;
+        int start = 0;
+        int length = s.length();
+        int sign = 1;
+        long n = 0;
+        if(radix != 0 && (radix < 2 || radix > 36)) return NaN;
+        while(start < length && Character.isWhitespace(s.charAt(start))) start++;
+        if((length >= start+1) && (s.charAt(start) == '+' || s.charAt(start) == '-')) {
+            sign = s.charAt(start) == '+' ? 1 : -1;
+            start++;
+        }
+        if(radix == 0 && length >= start+1 && s.charAt(start) == '0') {
+            start++;
+            if(length >= start+1 && (s.charAt(start) == 'x' || s.charAt(start) == 'X')) {
+                start++;
+                radix = 16;
+            } else {
+                radix = 8;
+                if(length == start || Character.digit(s.charAt(start+1),8)==-1) return new Integer(0);
+            }
+        }
+        if(radix == 0) radix = 10;
+        if(length == start || Character.digit(s.charAt(start),radix) == -1) return NaN;
+        // try the fast way first
+        try {
+            String s2 = start == 0 ? s : s.substring(start);
+            return new Integer(sign*Integer.parseInt(s2,radix));
+        } catch(NumberFormatException e) { }
+        // fall through to a slower but emca-compliant method
+        for(int i=start;i<length;i++) {
+            int digit = Character.digit(s.charAt(i),radix);
+            if(digit < 0) break;
+            n = n*radix + digit;
+            if(n < 0) return NaN; // overflow;
+        }
+        if(n <= Integer.MAX_VALUE) return new Integer(sign*(int)n);
+        return new Long((long)sign*n);
+    }
+    private Object parseFloat(JS.Array args) {
+        String s = args.length() > 0 ? args.elementAt(0).toString() : "";
+        int start = 0;
+        int length = s.length();
+        while(start < length && Character.isWhitespace(s.charAt(0))) start++;
+        int end = length;
+        // as long as the string has no trailing garbage,this is fast, its slow with
+        // trailing garbage
+        while(start < end) {
+            try {
+                return new Double(s.substring(start,length));
+            } catch(NumberFormatException e) { }
+            end--;
+        }
+        return NaN;
+    }
+    private Object isNaN(JS.Array args) {
+        double d = args.length() > 0 ? toDouble(args.elementAt(0)) : Double.NaN;
+        return d == d ? Boolean.FALSE : Boolean.TRUE;
+    }
+    private Object isFinite(JS.Array args) {
+        double d = args.length() > 0 ? toDouble(args.elementAt(0)) : Double.NaN;
+        return (d == d && !Double.isInfinite(d)) ? Boolean.TRUE : Boolean.FALSE;
+    }
+    private Object decodeURI(JS.Array args) {
+        throw new JS.Exn("decodeURI is unimplemented");
+    }
+    private Object decodeURIComponent(JS.Array args) {
+        throw new JS.Exn("decodeURIComponent is unimplemented");
+    }
+    private Object encodeURI(JS.Array args) {
+        throw new JS.Exn("encodeURI is unimplemented");
+    }
+    private Object encodeURIComponent(JS.Array args) {
+        throw new JS.Exn("encodeURIComponent is unimplemented");
+    }
+}
-- 
1.7.10.4