Squashed 'libs/protobuf/' content from commit fcd3b9a85

git-subtree-dir: libs/protobuf
git-subtree-split: fcd3b9a85ef36e46643dc30176cea1a7ad62e02b

objectivec/GPBWellKnownTypes.m

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+// 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 "GPBWellKnownTypes.h"
+
+#import "GPBUtilities_PackagePrivate.h"
+
+NSString *const GPBWellKnownTypesErrorDomain = GPBNSStringifySymbol(GPBWellKnownTypesErrorDomain);
+
+static NSString *kTypePrefixGoogleApisCom = @"type.googleapis.com/";
+
+static NSTimeInterval TimeIntervalFromSecondsAndNanos(int64_t seconds, int32_t nanos) {
+  return seconds + (NSTimeInterval)nanos / 1e9;
+}
+
+static int32_t SecondsAndNanosFromTimeInterval(NSTimeInterval time, int64_t *outSeconds,
+                                               BOOL nanosMustBePositive) {
+  NSTimeInterval seconds;
+  NSTimeInterval nanos = modf(time, &seconds);
+
+  if (nanosMustBePositive && (nanos < 0)) {
+    // Per Timestamp.proto, nanos is non-negative and "Negative second values with
+    // fractions must still have non-negative nanos values that count forward in
+    // time. Must be from 0 to 999,999,999 inclusive."
+    --seconds;
+    nanos = 1.0 + nanos;
+  }
+
+  nanos *= 1e9;
+  *outSeconds = (int64_t)seconds;
+  return (int32_t)nanos;
+}
+
+static NSString *BuildTypeURL(NSString *typeURLPrefix, NSString *fullName) {
+  if (typeURLPrefix.length == 0) {
+    return fullName;
+  }
+
+  if ([typeURLPrefix hasSuffix:@"/"]) {
+    return [typeURLPrefix stringByAppendingString:fullName];
+  }
+
+  return [NSString stringWithFormat:@"%@/%@", typeURLPrefix, fullName];
+}
+
+static NSString *ParseTypeFromURL(NSString *typeURLString) {
+  NSRange range = [typeURLString rangeOfString:@"/" options:NSBackwardsSearch];
+  if ((range.location == NSNotFound) || (NSMaxRange(range) == typeURLString.length)) {
+    return nil;
+  }
+  NSString *result = [typeURLString substringFromIndex:range.location + 1];
+  return result;
+}
+
+#pragma mark - GPBTimestamp
+
+@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 = SecondsAndNanosFromTimeInterval(timeIntervalSince1970, &seconds, YES);
+    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 TimeIntervalFromSecondsAndNanos(self.seconds, self.nanos);
+}
+
+- (void)setTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
+  int64_t seconds;
+  int32_t nanos = SecondsAndNanosFromTimeInterval(timeIntervalSince1970, &seconds, YES);
+  self.seconds = seconds;
+  self.nanos = nanos;
+}
+
+@end
+
+#pragma mark - GPBDuration
+
+@implementation GPBDuration (GBPWellKnownTypes)
+
+- (instancetype)initWithTimeInterval:(NSTimeInterval)timeInterval {
+  if ((self = [super init])) {
+    int64_t seconds;
+    int32_t nanos = SecondsAndNanosFromTimeInterval(timeInterval, &seconds, NO);
+    self.seconds = seconds;
+    self.nanos = nanos;
+  }
+  return self;
+}
+
+- (instancetype)initWithTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
+  return [self initWithTimeInterval:timeIntervalSince1970];
+}
+
+- (NSTimeInterval)timeInterval {
+  return TimeIntervalFromSecondsAndNanos(self.seconds, self.nanos);
+}
+
+- (void)setTimeInterval:(NSTimeInterval)timeInterval {
+  int64_t seconds;
+  int32_t nanos = SecondsAndNanosFromTimeInterval(timeInterval, &seconds, NO);
+  self.seconds = seconds;
+  self.nanos = nanos;
+}
+
+- (NSTimeInterval)timeIntervalSince1970 {
+  return self.timeInterval;
+}
+
+- (void)setTimeIntervalSince1970:(NSTimeInterval)timeIntervalSince1970 {
+  self.timeInterval = timeIntervalSince1970;
+}
+
+@end
+
+#pragma mark - GPBAny
+
+@implementation GPBAny (GBPWellKnownTypes)
+
++ (instancetype)anyWithMessage:(GPBMessage *)message error:(NSError **)errorPtr {
+  return [self anyWithMessage:message typeURLPrefix:kTypePrefixGoogleApisCom error:errorPtr];
+}
+
++ (instancetype)anyWithMessage:(GPBMessage *)message
+                 typeURLPrefix:(NSString *)typeURLPrefix
+                         error:(NSError **)errorPtr {
+  return [[[self alloc] initWithMessage:message typeURLPrefix:typeURLPrefix
+                                  error:errorPtr] autorelease];
+}
+
+- (instancetype)initWithMessage:(GPBMessage *)message error:(NSError **)errorPtr {
+  return [self initWithMessage:message typeURLPrefix:kTypePrefixGoogleApisCom error:errorPtr];
+}
+
+- (instancetype)initWithMessage:(GPBMessage *)message
+                  typeURLPrefix:(NSString *)typeURLPrefix
+                          error:(NSError **)errorPtr {
+  self = [self init];
+  if (self) {
+    if (![self packWithMessage:message typeURLPrefix:typeURLPrefix error:errorPtr]) {
+      [self release];
+      self = nil;
+    }
+  }
+  return self;
+}
+
+- (BOOL)packWithMessage:(GPBMessage *)message error:(NSError **)errorPtr {
+  return [self packWithMessage:message typeURLPrefix:kTypePrefixGoogleApisCom error:errorPtr];
+}
+
+- (BOOL)packWithMessage:(GPBMessage *)message
+          typeURLPrefix:(NSString *)typeURLPrefix
+                  error:(NSError **)errorPtr {
+  NSString *fullName = [message descriptor].fullName;
+  if (fullName.length == 0) {
+    if (errorPtr) {
+      *errorPtr = [NSError errorWithDomain:GPBWellKnownTypesErrorDomain
+                                      code:GPBWellKnownTypesErrorCodeFailedToComputeTypeURL
+                                  userInfo:nil];
+    }
+    return NO;
+  }
+  if (errorPtr) {
+    *errorPtr = nil;
+  }
+  self.typeURL = BuildTypeURL(typeURLPrefix, fullName);
+  self.value = message.data;
+  return YES;
+}
+
+- (GPBMessage *)unpackMessageClass:(Class)messageClass error:(NSError **)errorPtr {
+  NSString *fullName = [messageClass descriptor].fullName;
+  if (fullName.length == 0) {
+    if (errorPtr) {
+      *errorPtr = [NSError errorWithDomain:GPBWellKnownTypesErrorDomain
+                                      code:GPBWellKnownTypesErrorCodeFailedToComputeTypeURL
+                                  userInfo:nil];
+    }
+    return nil;
+  }
+
+  NSString *expectedFullName = ParseTypeFromURL(self.typeURL);
+  if ((expectedFullName == nil) || ![expectedFullName isEqual:fullName]) {
+    if (errorPtr) {
+      *errorPtr = [NSError errorWithDomain:GPBWellKnownTypesErrorDomain
+                                      code:GPBWellKnownTypesErrorCodeTypeURLMismatch
+                                  userInfo:nil];
+    }
+    return nil;
+  }
+
+  // Any is proto3, which means no extensions, so this assumes anything put
+  // within an any also won't need extensions. A second helper could be added
+  // if needed.
+  return [messageClass parseFromData:self.value error:errorPtr];
+}
+
+@end