objectivec/GPBWellKnownTypes.m

// Protocol Buffers - Google's data interchange format
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// https://developers.google.com/protocol-buffers/
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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