Make the fuchsia mojo/public repo the source of truth.

mojo/public/java/bindings/src/org/chromium/mojo/bindings/BindingsHelper.java

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package org.chromium.mojo.bindings;
-
-import org.chromium.mojo.system.AsyncWaiter;
-import org.chromium.mojo.system.Handle;
-
-/**
- * Helper functions.
- */
-public class BindingsHelper {
-    /**
-     * Alignment in bytes for mojo serialization.
-     */
-    public static final int ALIGNMENT = 8;
-
-    /**
-     * The size, in bytes, of a serialized handle. A handle is serialized as an int representing the
-     * offset of the handle in the list of handles.
-     */
-    public static final int SERIALIZED_HANDLE_SIZE = 4;
-
-    /**
-     * The size, in bytes, of a serialized interface, which consists of a serialized handle (4
-     * bytes) and a version number (4 bytes).
-     */
-    public static final int SERIALIZED_INTERFACE_SIZE = 8;
-
-    /**
-     * The size, in bytes, of a serialized pointer. A pointer is serializaed as an unsigned long
-     * representing the offset from its position to the pointed elemnt.
-     */
-    public static final int POINTER_SIZE = 8;
-
-    /**
-     * The size, in bytes, of a serialized union.
-     */
-    public static final int UNION_SIZE = 16;
-
-    /**
-     * The header for a serialized map element.
-     */
-    public static final DataHeader MAP_STRUCT_HEADER = new DataHeader(24, 0);
-
-    /**
-     * The value used for the expected length of a non-fixed size array.
-     */
-    public static final int UNSPECIFIED_ARRAY_LENGTH = -1;
-
-    /**
-     * Passed as |arrayNullability| when neither the array nor its elements are nullable.
-     */
-    public static final int NOTHING_NULLABLE = 0;
-
-    /**
-     * "Array bit" of |arrayNullability| is set iff the array itself is nullable.
-     */
-    public static final int ARRAY_NULLABLE = (1 << 0);
-
-    /**
-     * "Element bit" of |arrayNullability| is set iff the array elements are nullable.
-     */
-    public static final int ELEMENT_NULLABLE = (1 << 1);
-
-    public static boolean isArrayNullable(int arrayNullability) {
-        return (arrayNullability & ARRAY_NULLABLE) > 0;
-    }
-
-    public static boolean isElementNullable(int arrayNullability) {
-        return (arrayNullability & ELEMENT_NULLABLE) > 0;
-    }
-
-    /**
-     * Align |size| on {@link BindingsHelper#ALIGNMENT}.
-     */
-    public static int align(int size) {
-        return (size + ALIGNMENT - 1) & ~(ALIGNMENT - 1);
-    }
-
-    /**
-     * Align |size| on {@link BindingsHelper#ALIGNMENT}.
-     */
-    public static long align(long size) {
-        return (size + ALIGNMENT - 1) & ~(ALIGNMENT - 1);
-    }
-
-    /**
-     * Compute the size in bytes of the given string encoded as utf8.
-     */
-    public static int utf8StringSizeInBytes(String s) {
-        int res = 0;
-        for (int i = 0; i < s.length(); ++i) {
-            char c = s.charAt(i);
-            int codepoint = c;
-            if (isSurrogate(c)) {
-                i++;
-                char c2 = s.charAt(i);
-                codepoint = Character.toCodePoint(c, c2);
-            }
-            res += 1;
-            if (codepoint > 0x7f) {
-                res += 1;
-                if (codepoint > 0x7ff) {
-                    res += 1;
-                    if (codepoint > 0xffff) {
-                        res += 1;
-                        if (codepoint > 0x1fffff) {
-                            res += 1;
-                            if (codepoint > 0x3ffffff) {
-                                res += 1;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        return res;
-    }
-
-    /**
-     * Returns |true| if and only if the two objects are equals, handling |null|.
-     */
-    public static boolean equals(Object o1, Object o2) {
-        if (o1 == o2) {
-            return true;
-        }
-        if (o1 == null) {
-            return false;
-        }
-        return o1.equals(o2);
-    }
-
-    /**
-     * Returns the hash code of the object, handling |null|.
-     */
-    public static int hashCode(Object o) {
-        if (o == null) {
-            return 0;
-        }
-        return o.hashCode();
-    }
-
-    /**
-     * Returns the hash code of the value.
-     */
-    public static int hashCode(boolean o) {
-        return o ? 1231 : 1237;
-    }
-
-    /**
-     * Returns the hash code of the value.
-     */
-    public static int hashCode(long o) {
-        return (int) (o ^ (o >>> 32));
-    }
-
-    /**
-     * Returns the hash code of the value.
-     */
-    public static int hashCode(float o) {
-        return Float.floatToIntBits(o);
-    }
-
-    /**
-     * Returns the hash code of the value.
-     */
-    public static int hashCode(double o) {
-        return hashCode(Double.doubleToLongBits(o));
-    }
-
-    /**
-     * Returns the hash code of the value.
-     */
-    public static int hashCode(int o) {
-        return o;
-    }
-
-    /**
-     * Determines if the given {@code char} value is a Unicode <i>surrogate code unit</i>. See
-     * {@link Character#isSurrogate}. Extracting here because the method only exists at API level
-     * 19.
-     */
-    private static boolean isSurrogate(char c) {
-        return c >= Character.MIN_SURROGATE && c < (Character.MAX_SURROGATE + 1);
-    }
-
-    /**
-     * Returns an {@link AsyncWaiter} to use with the given handle, or |null| if none if available.
-     */
-    static AsyncWaiter getDefaultAsyncWaiterForHandle(Handle handle) {
-        if (handle.getCore() != null) {
-            return handle.getCore().getDefaultAsyncWaiter();
-        } else {
-            return null;
-        }
-    }
-}