objectivec/GPBWellKnownTypes.m

// Protocol Buffers - Google's data interchange format
// Copyright 2015 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
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// 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