Update //third_party/protobuf to version 3.

third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/Utils.java

Index: third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/Utils.java
diff --git a/third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/Utils.java b/third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/Utils.java
new file mode 100644
index 0000000000000000000000000000000000000000..596a0979920215b03ea7bcc6fd48d4b974b0f770
--- /dev/null
+++ b/third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/Utils.java
@@ -0,0 +1,300 @@
+/*
+ * Protocol Buffers - Google's data interchange format
+ * Copyright 2014 Google Inc.  All rights reserved.
+ * https://developers.google.com/protocol-buffers/
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.google.protobuf.jruby;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.DescriptorProtos;
+import com.google.protobuf.Descriptors;
+import org.jcodings.Encoding;
+import org.jcodings.specific.ASCIIEncoding;
+import org.jcodings.specific.USASCIIEncoding;
+import org.jcodings.specific.UTF8Encoding;
+import org.jruby.*;
+import org.jruby.runtime.Block;
+import org.jruby.runtime.ThreadContext;
+import org.jruby.runtime.builtin.IRubyObject;
+
+import java.math.BigInteger;
+
+public class Utils {
+    public static Descriptors.FieldDescriptor.Type rubyToFieldType(IRubyObject typeClass) {
+        return Descriptors.FieldDescriptor.Type.valueOf(typeClass.asJavaString().toUpperCase());
+    }
+
+    public static IRubyObject fieldTypeToRuby(ThreadContext context, Descriptors.FieldDescriptor.Type type) {
+        return fieldTypeToRuby(context, type.name());
+    }
+
+    public static IRubyObject fieldTypeToRuby(ThreadContext context, DescriptorProtos.FieldDescriptorProto.Type type) {
+        return fieldTypeToRuby(context, type.name());
+    }
+
+    private static IRubyObject fieldTypeToRuby(ThreadContext context, String typeName) {
+
+        return context.runtime.newSymbol(typeName.replace("TYPE_", "").toLowerCase());
+    }
+
+    public static void checkType(ThreadContext context, Descriptors.FieldDescriptor.Type fieldType,
+                            IRubyObject value, RubyModule typeClass) {
+        Ruby runtime = context.runtime;
+        Object val;
+        switch(fieldType) {
+            case INT32:
+            case INT64:
+            case UINT32:
+            case UINT64:
+                if (!isRubyNum(value)) {
+                    throw runtime.newTypeError("Expected number type for integral field.");
+                }
+                switch(fieldType) {
+                    case INT32:
+                        RubyNumeric.num2int(value);
+                        break;
+                    case INT64:
+                        RubyNumeric.num2long(value);
+                        break;
+                    case UINT32:
+                        num2uint(value);
+                        break;
+                    default:
+                        num2ulong(context.runtime, value);
+                        break;
+                }
+                checkIntTypePrecision(context, fieldType, value);
+                break;
+            case FLOAT:
+                if (!isRubyNum(value))
+                    throw runtime.newTypeError("Expected number type for float field.");
+                break;
+            case DOUBLE:
+                if (!isRubyNum(value))
+                    throw runtime.newTypeError("Expected number type for double field.");
+                break;
+            case BOOL:
+                if (!(value instanceof RubyBoolean))
+                    throw runtime.newTypeError("Invalid argument for boolean field.");
+                break;
+            case BYTES:
+            case STRING:
+                validateStringEncoding(context.runtime, fieldType, value);
+                break;
+            case MESSAGE:
+                if (value.getMetaClass() != typeClass) {
+                    throw runtime.newTypeError(value, typeClass);
+                }
+                break;
+            case ENUM:
+                if (value instanceof RubySymbol) {
+                    Descriptors.EnumDescriptor enumDescriptor =
+                            ((RubyEnumDescriptor) typeClass.getInstanceVariable(DESCRIPTOR_INSTANCE_VAR)).getDescriptor();
+                    val = enumDescriptor.findValueByName(value.asJavaString());
+                    if (val == null)
+                        throw runtime.newRangeError("Enum value " + value + " is not found.");
+                } else if(!isRubyNum(value)) {
+                    throw runtime.newTypeError("Expected number or symbol type for enum field.");
+                }
+                break;
+            default:
+                break;
+        }
+    }
+
+    public static IRubyObject wrapPrimaryValue(ThreadContext context, Descriptors.FieldDescriptor.Type fieldType, Object value) {
+        Ruby runtime = context.runtime;
+        switch (fieldType) {
+            case INT32:
+                return runtime.newFixnum((Integer) value);
+            case INT64:
+                return runtime.newFixnum((Long) value);
+            case UINT32:
+                return runtime.newFixnum(((Integer) value) & (-1l >>> 32));
+            case UINT64:
+                long ret = (Long) value;
+                return ret >= 0 ? runtime.newFixnum(ret) :
+                        RubyBignum.newBignum(runtime, UINT64_COMPLEMENTARY.add(new BigInteger(ret + "")));
+            case FLOAT:
+                return runtime.newFloat((Float) value);
+            case DOUBLE:
+                return runtime.newFloat((Double) value);
+            case BOOL:
+                return (Boolean) value ? runtime.getTrue() : runtime.getFalse();
+            case BYTES:
+                return runtime.newString(((ByteString) value).toStringUtf8());
+            case STRING:
+                return runtime.newString(value.toString());
+            default:
+                return runtime.getNil();
+        }
+    }
+
+    public static int num2uint(IRubyObject value) {
+        long longVal = RubyNumeric.num2long(value);
+        if (longVal > UINT_MAX)
+            throw value.getRuntime().newRangeError("Integer " + longVal + " too big to convert to 'unsigned int'");
+        long num = longVal;
+        if (num > Integer.MAX_VALUE || num < Integer.MIN_VALUE)
+            // encode to UINT32
+            num = (-longVal ^ (-1l >>> 32) ) + 1;
+        RubyNumeric.checkInt(value, num);
+        return (int) num;
+    }
+
+    public static long num2ulong(Ruby runtime, IRubyObject value) {
+        if (value instanceof RubyFloat) {
+            RubyBignum bignum = RubyBignum.newBignum(runtime, ((RubyFloat) value).getDoubleValue());
+            return RubyBignum.big2ulong(bignum);
+        } else if (value instanceof RubyBignum) {
+            return RubyBignum.big2ulong((RubyBignum) value);
+        } else {
+            return RubyNumeric.num2long(value);
+        }
+    }
+
+    public static void validateStringEncoding(Ruby runtime, Descriptors.FieldDescriptor.Type type, IRubyObject value) {
+        if (!(value instanceof RubyString))
+            throw runtime.newTypeError("Invalid argument for string field.");
+        Encoding encoding = ((RubyString) value).getEncoding();
+        switch(type) {
+            case BYTES:
+                if (encoding != ASCIIEncoding.INSTANCE)
+                    throw runtime.newTypeError("Encoding for bytes fields" +
+                            " must be \"ASCII-8BIT\", but was " + encoding);
+                break;
+            case STRING:
+                if (encoding != UTF8Encoding.INSTANCE
+                        && encoding != USASCIIEncoding.INSTANCE)
+                    throw runtime.newTypeError("Encoding for string fields" +
+                            " must be \"UTF-8\" or \"ASCII\", but was " + encoding);
+                break;
+            default:
+                break;
+        }
+    }
+
+    public static void checkNameAvailability(ThreadContext context, String name) {
+        if (context.runtime.getObject().getConstantAt(name) != null)
+            throw context.runtime.newNameError(name + " is already defined", name);
+    }
+
+    /**
+     * Replace invalid "." in descriptor with __DOT__
+     * @param name
+     * @return
+     */
+    public static String escapeIdentifier(String name) {
+        return name.replace(".", BADNAME_REPLACEMENT);
+    }
+
+    /**
+     * Replace __DOT__ in descriptor name with "."
+     * @param name
+     * @return
+     */
+    public static String unescapeIdentifier(String name) {
+        return name.replace(BADNAME_REPLACEMENT, ".");
+    }
+
+    public static boolean isMapEntry(Descriptors.FieldDescriptor fieldDescriptor) {
+        return fieldDescriptor.getType() == Descriptors.FieldDescriptor.Type.MESSAGE &&
+                fieldDescriptor.isRepeated() &&
+                fieldDescriptor.getMessageType().getOptions().getMapEntry();
+    }
+
+    public static RubyFieldDescriptor msgdefCreateField(ThreadContext context, String label, IRubyObject name,
+                                      IRubyObject type, IRubyObject number, IRubyObject typeClass, RubyClass cFieldDescriptor) {
+        Ruby runtime = context.runtime;
+        RubyFieldDescriptor fieldDef = (RubyFieldDescriptor) cFieldDescriptor.newInstance(context, Block.NULL_BLOCK);
+        fieldDef.setLabel(context, runtime.newString(label));
+        fieldDef.setName(context, name);
+        fieldDef.setType(context, type);
+        fieldDef.setNumber(context, number);
+
+        if (!typeClass.isNil()) {
+            if (!(typeClass instanceof RubyString)) {
+                throw runtime.newArgumentError("expected string for type class");
+            }
+            fieldDef.setSubmsgName(context, typeClass);
+        }
+        return fieldDef;
+    }
+
+    protected static void checkIntTypePrecision(ThreadContext context, Descriptors.FieldDescriptor.Type type, IRubyObject value) {
+        if (value instanceof RubyFloat) {
+            double doubleVal = RubyNumeric.num2dbl(value);
+            if (Math.floor(doubleVal) != doubleVal) {
+                throw context.runtime.newRangeError("Non-integral floating point value assigned to integer field.");
+            }
+        }
+        if (type == Descriptors.FieldDescriptor.Type.UINT32 || type == Descriptors.FieldDescriptor.Type.UINT64) {
+            if (RubyNumeric.num2dbl(value) < 0) {
+                throw context.runtime.newRangeError("Assigning negative value to unsigned integer field.");
+            }
+        }
+    }
+
+    protected static boolean isRubyNum(Object value) {
+        return value instanceof RubyFixnum || value instanceof RubyFloat || value instanceof RubyBignum;
+    }
+
+    protected static void validateTypeClass(ThreadContext context, Descriptors.FieldDescriptor.Type type, IRubyObject value) {
+        Ruby runtime = context.runtime;
+        if (!(value instanceof RubyModule)) {
+            throw runtime.newArgumentError("TypeClass has incorrect type");
+        }
+        RubyModule klass = (RubyModule) value;
+        IRubyObject descriptor = klass.getInstanceVariable(DESCRIPTOR_INSTANCE_VAR);
+        if (descriptor.isNil()) {
+            throw runtime.newArgumentError("Type class has no descriptor. Please pass a " +
+                    "class or enum as returned by the DescriptorPool.");
+        }
+        if (type == Descriptors.FieldDescriptor.Type.MESSAGE) {
+            if (! (descriptor instanceof RubyDescriptor)) {
+                throw runtime.newArgumentError("Descriptor has an incorrect type");
+            }
+        } else if (type == Descriptors.FieldDescriptor.Type.ENUM) {
+            if (! (descriptor instanceof RubyEnumDescriptor)) {
+                throw runtime.newArgumentError("Descriptor has an incorrect type");
+            }
+        }
+    }
+
+    public static String BADNAME_REPLACEMENT = "__DOT__";
+
+    public static String DESCRIPTOR_INSTANCE_VAR = "@descriptor";
+
+    public static String EQUAL_SIGN = "=";
+
+    private static BigInteger UINT64_COMPLEMENTARY = new BigInteger("18446744073709551616"); //Math.pow(2, 64)
+
+    private static long UINT_MAX = 0xffffffffl;
+}