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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #import "base/ios/ns_error_util.h" | |
6 | |
7 #import <Foundation/Foundation.h> | |
8 | |
9 #include "base/logging.h" | |
10 #include "base/mac/scoped_nsobject.h" | |
11 | |
12 namespace base { | |
13 namespace ios { | |
14 | |
15 namespace { | |
16 // Iterates through |error|'s underlying errors and returns them in an array. | |
stuartmorgan
2015/06/24 21:30:48
Since this actually returns |error| as well, the n
kkhorimoto
2015/06/24 22:17:59
Done.
| |
17 NSArray* GetUnderlyingErrorChainForError(NSError* error) { | |
18 NSMutableArray* error_chain = [NSMutableArray array]; | |
19 NSError* current_error = error; | |
20 while (current_error) { | |
21 DCHECK([current_error isKindOfClass:[NSError class]]); | |
22 [error_chain addObject:current_error]; | |
23 current_error = current_error.userInfo[NSUnderlyingErrorKey]; | |
24 } | |
25 return error_chain; | |
26 } | |
27 } // namespace | |
28 | |
29 NSError* GetFinalUnderlyingErrorFromError(NSError* error) { | |
30 DCHECK(error); | |
31 return [GetUnderlyingErrorChainForError(error) lastObject]; | |
32 } | |
33 | |
34 NSError* ErrorWithAppendedUnderlyingError(NSError* original_error, | |
35 NSError* underlying_error) { | |
36 DCHECK(original_error); | |
37 DCHECK(underlying_error); | |
38 NSArray* error_chain = GetUnderlyingErrorChainForError(original_error); | |
39 NSError* current_error = underlying_error; | |
40 for (NSInteger idx = error_chain.count - 1; idx >= 0; --idx) { | |
41 NSError* error = error_chain[idx]; | |
42 scoped_nsobject<NSMutableDictionary> user_info( | |
43 [error.userInfo mutableCopy]); | |
44 [user_info setObject:current_error forKey:NSUnderlyingErrorKey]; | |
45 current_error = [NSError errorWithDomain:error.domain | |
46 code:error.code | |
47 userInfo:user_info]; | |
48 } | |
49 return current_error; | |
50 } | |
51 | |
52 } // namespace ios | |
53 } // namespace base | |
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