pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/utils/Rfc3492Idn.java

@@ -0,0 +1,141 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package ch.boye.httpclientandroidlib.client.utils;
+
+import java.util.StringTokenizer;
+
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+
+/**
+ * Implementation from pseudo code in RFC 3492.
+ *
+ * @since 4.0
+ */
+@Immutable
+public class Rfc3492Idn implements Idn {
+    private static final int base = 36;
+    private static final int tmin = 1;
+    private static final int tmax = 26;
+    private static final int skew = 38;
+    private static final int damp = 700;
+    private static final int initial_bias = 72;
+    private static final int initial_n = 128;
+    private static final char delimiter = '-';
+    private static final String ACE_PREFIX = "xn--";
+
+    private int adapt(final int delta, final int numpoints, final boolean firsttime) {
+        int d = delta;
+        if (firsttime) {
+            d = d / damp;
+        } else {
+            d = d / 2;
+        }
+        d = d + (d / numpoints);
+        int k = 0;
+        while (d > ((base - tmin) * tmax) / 2) {
+          d = d / (base - tmin);
+          k = k + base;
+        }
+        return k + (((base - tmin + 1) * d) / (d + skew));
+    }
+
+    private int digit(final char c) {
+        if ((c >= 'A') && (c <= 'Z')) {
+            return (c - 'A');
+        }
+        if ((c >= 'a') && (c <= 'z')) {
+            return (c - 'a');
+        }
+        if ((c >= '0') && (c <= '9')) {
+            return (c - '0') + 26;
+        }
+        throw new IllegalArgumentException("illegal digit: "+ c);
+    }
+
+    public String toUnicode(final String punycode) {
+        final StringBuilder unicode = new StringBuilder(punycode.length());
+        final StringTokenizer tok = new StringTokenizer(punycode, ".");
+        while (tok.hasMoreTokens()) {
+            String t = tok.nextToken();
+            if (unicode.length() > 0) {
+                unicode.append('.');
+            }
+            if (t.startsWith(ACE_PREFIX)) {
+                t = decode(t.substring(4));
+            }
+            unicode.append(t);
+        }
+        return unicode.toString();
+    }
+
+    protected String decode(final String s) {
+        String input = s;
+        int n = initial_n;
+        int i = 0;
+        int bias = initial_bias;
+        final StringBuilder output = new StringBuilder(input.length());
+        final int lastdelim = input.lastIndexOf(delimiter);
+        if (lastdelim != -1) {
+            output.append(input.subSequence(0, lastdelim));
+            input = input.substring(lastdelim + 1);
+        }
+
+        while (input.length() > 0) {
+            final int oldi = i;
+            int w = 1;
+            for (int k = base;; k += base) {
+                if (input.length() == 0) {
+                    break;
+                }
+                final char c = input.charAt(0);
+                input = input.substring(1);
+                final int digit = digit(c);
+                i = i + digit * w; // FIXME fail on overflow
+                final int t;
+                if (k <= bias + tmin) {
+                    t = tmin;
+                } else if (k >= bias + tmax) {
+                    t = tmax;
+                } else {
+                    t = k - bias;
+                }
+                if (digit < t) {
+                    break;
+                }
+                w = w * (base - t); // FIXME fail on overflow
+            }
+            bias = adapt(i - oldi, output.length() + 1, (oldi == 0));
+            n = n + i / (output.length() + 1); // FIXME fail on overflow
+            i = i % (output.length() + 1);
+            // {if n is a basic code point then fail}
+            output.insert(i, (char) n);
+            i++;
+        }
+        return output.toString();
+    }
+
+}