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

third_party/protobuf/objectivec/GPBWellKnownTypes.m

-// Protocol Buffers - Google's data interchange format
-// Copyright 2015 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.
-
-// Importing sources here to force the linker to include our category methods in
-// the static library. If these were compiled separately, the category methods
-// below would be stripped by the linker.
-
-#import "google/protobuf/Timestamp.pbobjc.m"
-#import "google/protobuf/Duration.pbobjc.m"
-#import "GPBWellKnownTypes.h"
-
-static NSTimeInterval TimeIntervalSince1970FromSecondsAndNanos(int64_t seconds,
-                                                               int32_t nanos) {
-  return seconds + (NSTimeInterval)nanos / 1e9;
-}
-
-static int32_t SecondsAndNanosFromTimeIntervalSince1970(NSTimeInterval time,
-                                                        int64_t *outSeconds) {
-  NSTimeInterval seconds;
-  NSTimeInterval nanos = modf(time, &seconds);
-  nanos *= 1e9;
-  *outSeconds = (int64_t)seconds;
-  return (int32_t)nanos;
-}
-
-@implementation GPBTimestamp (GBPWellKnownTypes)
-
-- (instancetype)initWithDate:(NSDate *)date {
-  return [self initWithTimeIntervalSince1970:date.timeIntervalSince1970];
-}
-
-- (instancetype)initWithTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
-  if ((self = [super init])) {
-    int64_t seconds;
-    int32_t nanos = SecondsAndNanosFromTimeIntervalSince1970(
-        timeIntervalSince1970, &seconds);
-    self.seconds = seconds;
-    self.nanos = nanos;
-  }
-  return self;
-}
-
-- (NSDate *)date {
-  return [NSDate dateWithTimeIntervalSince1970:self.timeIntervalSince1970];
-}
-
-- (void)setDate:(NSDate *)date {
-  self.timeIntervalSince1970 = date.timeIntervalSince1970;
-}
-
-- (NSTimeInterval)timeIntervalSince1970 {
-  return TimeIntervalSince1970FromSecondsAndNanos(self.seconds, self.nanos);
-}
-
-- (void)setTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
-  int64_t seconds;
-  int32_t nanos =
-      SecondsAndNanosFromTimeIntervalSince1970(timeIntervalSince1970, &seconds);
-  self.seconds = seconds;
-  self.nanos = nanos;
-}
-
-@end
-
-@implementation GPBDuration (GBPWellKnownTypes)
-
-- (instancetype)initWithTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
-  if ((self = [super init])) {
-    int64_t seconds;
-    int32_t nanos = SecondsAndNanosFromTimeIntervalSince1970(
-        timeIntervalSince1970, &seconds);
-    self.seconds = seconds;
-    self.nanos = nanos;
-  }
-  return self;
-}
-
-- (NSTimeInterval)timeIntervalSince1970 {
-  return TimeIntervalSince1970FromSecondsAndNanos(self.seconds, self.nanos);
-}
-
-- (void)setTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
-  int64_t seconds;
-  int32_t nanos =
-      SecondsAndNanosFromTimeIntervalSince1970(timeIntervalSince1970, &seconds);
-  self.seconds = seconds;
-  self.nanos = nanos;
-}
-
-@end
-
-NSString *const GPBTypeGoogleApisComPrefix = @"type.googleapis.com/";
-
-@implementation GPBAny (GBPWellKnownTypes)
-
-- (instancetype)initWithMessage:(GPBMessage*)message {
-  self = [super init];
-  if (self) {
-    [self setMessage:message];
-  }
-  return self;
-}
-
-- (NSString*)typeName {
-  NSAssert([self.typeURL hasPrefix:GPBTypeGoogleApisComPrefix],
-           @"Invalid any type url (%@).", self.typeURL);
-  if (![self.typeURL hasPrefix:GPBTypeGoogleApisComPrefix]) {
-    return nil;
-  }
-  return [self.typeURL substringFromIndex:[GPBTypeGoogleApisComPrefix length]];
-}
-
-- (void)setMessage:(GPBMessage*)message {
-  self.typeURL = [GPBTypeGoogleApisComPrefix stringByAppendingString:message.descriptor.name];
-  self.value = message.data;
-}
-
-- (GPBMessage*)messageOfClass:(Class)messageClass {
-  if ([self wrapsMessageOfClass:messageClass]) {
-    GPBMessage* message = [messageClass message];
-    [message mergeFromData:self.value extensionRegistry:nil];
-    return message;
-  } else {
-    return nil;
-  }
-}
-
-- (BOOL)wrapsMessageOfClass:(Class)messageClass {
-  NSAssert([messageClass isSubclassofClass:[GPBMessage class]],
-           @"Given class (%@) is not a subclass of GPBMessage",
-           [messageClass name]);
-  if (![messageClass isSubclassOfClass:[GPBMessage class]]) {
-    return NO;
-  }
-  return [[self typeName] isEqualToString:messageClass.descriptor.name];
-}
-
-@end
-