Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/objectivec/GPBExtensionInternals.m

Index: third_party/protobuf/objectivec/GPBExtensionInternals.m
diff --git a/third_party/protobuf/objectivec/GPBExtensionInternals.m b/third_party/protobuf/objectivec/GPBExtensionInternals.m
deleted file mode 100644
index 634c3369a7723fe02a4beebc098d63061add708c..0000000000000000000000000000000000000000
--- a/third_party/protobuf/objectivec/GPBExtensionInternals.m
+++ /dev/null
@@ -1,380 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 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.
-
-#import "GPBExtensionInternals.h"
-
-#import <objc/runtime.h>
-
-#import "GPBCodedInputStream_PackagePrivate.h"
-#import "GPBCodedOutputStream.h"
-#import "GPBDescriptor_PackagePrivate.h"
-#import "GPBMessage_PackagePrivate.h"
-#import "GPBUtilities_PackagePrivate.h"
-
-static id NewSingleValueFromInputStream(GPBExtensionDescriptor *extension,
-                                        GPBCodedInputStream *input,
-                                        GPBExtensionRegistry *extensionRegistry,
-                                        GPBMessage *existingValue)
-    __attribute__((ns_returns_retained));
-
-GPB_INLINE size_t DataTypeSize(GPBDataType dataType) {
-  switch (dataType) {
-    case GPBDataTypeBool:
-      return 1;
-    case GPBDataTypeFixed32:
-    case GPBDataTypeSFixed32:
-    case GPBDataTypeFloat:
-      return 4;
-    case GPBDataTypeFixed64:
-    case GPBDataTypeSFixed64:
-    case GPBDataTypeDouble:
-      return 8;
-    default:
-      return 0;
-  }
-}
-
-static size_t ComputePBSerializedSizeNoTagOfObject(GPBDataType dataType, id object) {
-#define FIELD_CASE(TYPE, ACCESSOR)                                     \
-  case GPBDataType##TYPE:                                              \
-    return GPBCompute##TYPE##SizeNoTag([(NSNumber *)object ACCESSOR]);
-#define FIELD_CASE2(TYPE)                                              \
-  case GPBDataType##TYPE:                                              \
-    return GPBCompute##TYPE##SizeNoTag(object);
-  switch (dataType) {
-    FIELD_CASE(Bool, boolValue)
-    FIELD_CASE(Float, floatValue)
-    FIELD_CASE(Double, doubleValue)
-    FIELD_CASE(Int32, intValue)
-    FIELD_CASE(SFixed32, intValue)
-    FIELD_CASE(SInt32, intValue)
-    FIELD_CASE(Enum, intValue)
-    FIELD_CASE(Int64, longLongValue)
-    FIELD_CASE(SInt64, longLongValue)
-    FIELD_CASE(SFixed64, longLongValue)
-    FIELD_CASE(UInt32, unsignedIntValue)
-    FIELD_CASE(Fixed32, unsignedIntValue)
-    FIELD_CASE(UInt64, unsignedLongLongValue)
-    FIELD_CASE(Fixed64, unsignedLongLongValue)
-    FIELD_CASE2(Bytes)
-    FIELD_CASE2(String)
-    FIELD_CASE2(Message)
-    FIELD_CASE2(Group)
-  }
-#undef FIELD_CASE
-#undef FIELD_CASE2
-}
-
-static size_t ComputeSerializedSizeIncludingTagOfObject(
-    GPBExtensionDescription *description, id object) {
-#define FIELD_CASE(TYPE, ACCESSOR)                                   \
-  case GPBDataType##TYPE:                                            \
-    return GPBCompute##TYPE##Size(description->fieldNumber,          \
-                                  [(NSNumber *)object ACCESSOR]);
-#define FIELD_CASE2(TYPE)                                            \
-  case GPBDataType##TYPE:                                            \
-    return GPBCompute##TYPE##Size(description->fieldNumber, object);
-  switch (description->dataType) {
-    FIELD_CASE(Bool, boolValue)
-    FIELD_CASE(Float, floatValue)
-    FIELD_CASE(Double, doubleValue)
-    FIELD_CASE(Int32, intValue)
-    FIELD_CASE(SFixed32, intValue)
-    FIELD_CASE(SInt32, intValue)
-    FIELD_CASE(Enum, intValue)
-    FIELD_CASE(Int64, longLongValue)
-    FIELD_CASE(SInt64, longLongValue)
-    FIELD_CASE(SFixed64, longLongValue)
-    FIELD_CASE(UInt32, unsignedIntValue)
-    FIELD_CASE(Fixed32, unsignedIntValue)
-    FIELD_CASE(UInt64, unsignedLongLongValue)
-    FIELD_CASE(Fixed64, unsignedLongLongValue)
-    FIELD_CASE2(Bytes)
-    FIELD_CASE2(String)
-    FIELD_CASE2(Group)
-    case GPBDataTypeMessage:
-      if (GPBExtensionIsWireFormat(description)) {
-        return GPBComputeMessageSetExtensionSize(description->fieldNumber,
-                                                 object);
-      } else {
-        return GPBComputeMessageSize(description->fieldNumber, object);
-      }
-  }
-#undef FIELD_CASE
-#undef FIELD_CASE2
-}
-
-static size_t ComputeSerializedSizeIncludingTagOfArray(
-    GPBExtensionDescription *description, NSArray *values) {
-  if (GPBExtensionIsPacked(description)) {
-    size_t size = 0;
-    size_t typeSize = DataTypeSize(description->dataType);
-    if (typeSize != 0) {
-      size = values.count * typeSize;
-    } else {
-      for (id value in values) {
-        size +=
-            ComputePBSerializedSizeNoTagOfObject(description->dataType, value);
-      }
-    }
-    return size + GPBComputeTagSize(description->fieldNumber) +
-           GPBComputeRawVarint32SizeForInteger(size);
-  } else {
-    size_t size = 0;
-    for (id value in values) {
-      size += ComputeSerializedSizeIncludingTagOfObject(description, value);
-    }
-    return size;
-  }
-}
-
-static void WriteObjectIncludingTagToCodedOutputStream(
-    id object, GPBExtensionDescription *description,
-    GPBCodedOutputStream *output) {
-#define FIELD_CASE(TYPE, ACCESSOR)                      \
-  case GPBDataType##TYPE:                               \
-    [output write##TYPE:description->fieldNumber        \
-                  value:[(NSNumber *)object ACCESSOR]]; \
-    return;
-#define FIELD_CASE2(TYPE)                                       \
-  case GPBDataType##TYPE:                                       \
-    [output write##TYPE:description->fieldNumber value:object]; \
-    return;
-  switch (description->dataType) {
-    FIELD_CASE(Bool, boolValue)
-    FIELD_CASE(Float, floatValue)
-    FIELD_CASE(Double, doubleValue)
-    FIELD_CASE(Int32, intValue)
-    FIELD_CASE(SFixed32, intValue)
-    FIELD_CASE(SInt32, intValue)
-    FIELD_CASE(Enum, intValue)
-    FIELD_CASE(Int64, longLongValue)
-    FIELD_CASE(SInt64, longLongValue)
-    FIELD_CASE(SFixed64, longLongValue)
-    FIELD_CASE(UInt32, unsignedIntValue)
-    FIELD_CASE(Fixed32, unsignedIntValue)
-    FIELD_CASE(UInt64, unsignedLongLongValue)
-    FIELD_CASE(Fixed64, unsignedLongLongValue)
-    FIELD_CASE2(Bytes)
-    FIELD_CASE2(String)
-    FIELD_CASE2(Group)
-    case GPBDataTypeMessage:
-      if (GPBExtensionIsWireFormat(description)) {
-        [output writeMessageSetExtension:description->fieldNumber value:object];
-      } else {
-        [output writeMessage:description->fieldNumber value:object];
-      }
-      return;
-  }
-#undef FIELD_CASE
-#undef FIELD_CASE2
-}
-
-static void WriteObjectNoTagToCodedOutputStream(
-    id object, GPBExtensionDescription *description,
-    GPBCodedOutputStream *output) {
-#define FIELD_CASE(TYPE, ACCESSOR)                             \
-  case GPBDataType##TYPE:                                      \
-    [output write##TYPE##NoTag:[(NSNumber *)object ACCESSOR]]; \
-    return;
-#define FIELD_CASE2(TYPE)               \
-  case GPBDataType##TYPE:               \
-    [output write##TYPE##NoTag:object]; \
-    return;
-  switch (description->dataType) {
-    FIELD_CASE(Bool, boolValue)
-    FIELD_CASE(Float, floatValue)
-    FIELD_CASE(Double, doubleValue)
-    FIELD_CASE(Int32, intValue)
-    FIELD_CASE(SFixed32, intValue)
-    FIELD_CASE(SInt32, intValue)
-    FIELD_CASE(Enum, intValue)
-    FIELD_CASE(Int64, longLongValue)
-    FIELD_CASE(SInt64, longLongValue)
-    FIELD_CASE(SFixed64, longLongValue)
-    FIELD_CASE(UInt32, unsignedIntValue)
-    FIELD_CASE(Fixed32, unsignedIntValue)
-    FIELD_CASE(UInt64, unsignedLongLongValue)
-    FIELD_CASE(Fixed64, unsignedLongLongValue)
-    FIELD_CASE2(Bytes)
-    FIELD_CASE2(String)
-    FIELD_CASE2(Message)
-    case GPBDataTypeGroup:
-      [output writeGroupNoTag:description->fieldNumber value:object];
-      return;
-  }
-#undef FIELD_CASE
-#undef FIELD_CASE2
-}
-
-static void WriteArrayIncludingTagsToCodedOutputStream(
-    NSArray *values, GPBExtensionDescription *description,
-    GPBCodedOutputStream *output) {
-  if (GPBExtensionIsPacked(description)) {
-    [output writeTag:description->fieldNumber
-              format:GPBWireFormatLengthDelimited];
-    size_t dataSize = 0;
-    size_t typeSize = DataTypeSize(description->dataType);
-    if (typeSize != 0) {
-      dataSize = values.count * typeSize;
-    } else {
-      for (id value in values) {
-        dataSize +=
-            ComputePBSerializedSizeNoTagOfObject(description->dataType, value);
-      }
-    }
-    [output writeRawVarintSizeTAs32:dataSize];
-    for (id value in values) {
-      WriteObjectNoTagToCodedOutputStream(value, description, output);
-    }
-  } else {
-    for (id value in values) {
-      WriteObjectIncludingTagToCodedOutputStream(value, description, output);
-    }
-  }
-}
-
-void GPBExtensionMergeFromInputStream(GPBExtensionDescriptor *extension,
-                                      BOOL isPackedOnStream,
-                                      GPBCodedInputStream *input,
-                                      GPBExtensionRegistry *extensionRegistry,
-                                      GPBMessage *message) {
-  GPBExtensionDescription *description = extension->description_;
-  GPBCodedInputStreamState *state = &input->state_;
-  if (isPackedOnStream) {
-    NSCAssert(GPBExtensionIsRepeated(description),
-              @"How was it packed if it isn't repeated?");
-    int32_t length = GPBCodedInputStreamReadInt32(state);
-    size_t limit = GPBCodedInputStreamPushLimit(state, length);
-    while (GPBCodedInputStreamBytesUntilLimit(state) > 0) {
-      id value = NewSingleValueFromInputStream(extension,
-                                               input,
-                                               extensionRegistry,
-                                               nil);
-      [message addExtension:extension value:value];
-      [value release];
-    }
-    GPBCodedInputStreamPopLimit(state, limit);
-  } else {
-    id existingValue = nil;
-    BOOL isRepeated = GPBExtensionIsRepeated(description);
-    if (!isRepeated && GPBDataTypeIsMessage(description->dataType)) {
-      existingValue = [message getExistingExtension:extension];
-    }
-    id value = NewSingleValueFromInputStream(extension,
-                                             input,
-                                             extensionRegistry,
-                                             existingValue);
-    if (isRepeated) {
-      [message addExtension:extension value:value];
-    } else {
-      [message setExtension:extension value:value];
-    }
-    [value release];
-  }
-}
-
-void GPBWriteExtensionValueToOutputStream(GPBExtensionDescriptor *extension,
-                                          id value,
-                                          GPBCodedOutputStream *output) {
-  GPBExtensionDescription *description = extension->description_;
-  if (GPBExtensionIsRepeated(description)) {
-    WriteArrayIncludingTagsToCodedOutputStream(value, description, output);
-  } else {
-    WriteObjectIncludingTagToCodedOutputStream(value, description, output);
-  }
-}
-
-size_t GPBComputeExtensionSerializedSizeIncludingTag(
-    GPBExtensionDescriptor *extension, id value) {
-  GPBExtensionDescription *description = extension->description_;
-  if (GPBExtensionIsRepeated(description)) {
-    return ComputeSerializedSizeIncludingTagOfArray(description, value);
-  } else {
-    return ComputeSerializedSizeIncludingTagOfObject(description, value);
-  }
-}
-
-// Note that this returns a retained value intentionally.
-static id NewSingleValueFromInputStream(GPBExtensionDescriptor *extension,
-                                        GPBCodedInputStream *input,
-                                        GPBExtensionRegistry *extensionRegistry,
-                                        GPBMessage *existingValue) {
-  GPBExtensionDescription *description = extension->description_;
-  GPBCodedInputStreamState *state = &input->state_;
-  switch (description->dataType) {
-    case GPBDataTypeBool:     return [[NSNumber alloc] initWithBool:GPBCodedInputStreamReadBool(state)];
-    case GPBDataTypeFixed32:  return [[NSNumber alloc] initWithUnsignedInt:GPBCodedInputStreamReadFixed32(state)];
-    case GPBDataTypeSFixed32: return [[NSNumber alloc] initWithInt:GPBCodedInputStreamReadSFixed32(state)];
-    case GPBDataTypeFloat:    return [[NSNumber alloc] initWithFloat:GPBCodedInputStreamReadFloat(state)];
-    case GPBDataTypeFixed64:  return [[NSNumber alloc] initWithUnsignedLongLong:GPBCodedInputStreamReadFixed64(state)];
-    case GPBDataTypeSFixed64: return [[NSNumber alloc] initWithLongLong:GPBCodedInputStreamReadSFixed64(state)];
-    case GPBDataTypeDouble:   return [[NSNumber alloc] initWithDouble:GPBCodedInputStreamReadDouble(state)];
-    case GPBDataTypeInt32:    return [[NSNumber alloc] initWithInt:GPBCodedInputStreamReadInt32(state)];
-    case GPBDataTypeInt64:    return [[NSNumber alloc] initWithLongLong:GPBCodedInputStreamReadInt64(state)];
-    case GPBDataTypeSInt32:   return [[NSNumber alloc] initWithInt:GPBCodedInputStreamReadSInt32(state)];
-    case GPBDataTypeSInt64:   return [[NSNumber alloc] initWithLongLong:GPBCodedInputStreamReadSInt64(state)];
-    case GPBDataTypeUInt32:   return [[NSNumber alloc] initWithUnsignedInt:GPBCodedInputStreamReadUInt32(state)];
-    case GPBDataTypeUInt64:   return [[NSNumber alloc] initWithUnsignedLongLong:GPBCodedInputStreamReadUInt64(state)];
-    case GPBDataTypeBytes:    return GPBCodedInputStreamReadRetainedBytes(state);
-    case GPBDataTypeString:   return GPBCodedInputStreamReadRetainedString(state);
-    case GPBDataTypeEnum:     return [[NSNumber alloc] initWithInt:GPBCodedInputStreamReadEnum(state)];
-    case GPBDataTypeGroup:
-    case GPBDataTypeMessage: {
-      GPBMessage *message;
-      if (existingValue) {
-        message = [existingValue retain];
-      } else {
-        GPBDescriptor *decriptor = [extension.msgClass descriptor];
-        message = [[decriptor.messageClass alloc] init];
-      }
-
-      if (description->dataType == GPBDataTypeGroup) {
-        [input readGroup:description->fieldNumber
-                 message:message
-            extensionRegistry:extensionRegistry];
-      } else {
-        // description->dataType == GPBDataTypeMessage
-        if (GPBExtensionIsWireFormat(description)) {
-          // For MessageSet fields the message length will have already been
-          // read.
-          [message mergeFromCodedInputStream:input
-                           extensionRegistry:extensionRegistry];
-        } else {
-          [input readMessage:message extensionRegistry:extensionRegistry];
-        }
-      }
-
-      return message;
-    }
-  }
-
-  return nil;
-}