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54 lines
1.7 KiB
Plaintext
54 lines
1.7 KiB
Plaintext
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#import "base/ios/ns_error_util.h"
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#import <Foundation/Foundation.h>
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#include "base/logging.h"
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#include "base/mac/scoped_nsobject.h"
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namespace base {
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namespace ios {
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namespace {
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// Iterates through |error|'s underlying errors and returns them in an array.
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NSArray* GetFullErrorChainForError(NSError* error) {
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NSMutableArray* error_chain = [NSMutableArray array];
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NSError* current_error = error;
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while (current_error) {
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DCHECK([current_error isKindOfClass:[NSError class]]);
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[error_chain addObject:current_error];
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current_error = current_error.userInfo[NSUnderlyingErrorKey];
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}
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return error_chain;
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}
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} // namespace
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NSError* GetFinalUnderlyingErrorFromError(NSError* error) {
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DCHECK(error);
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return [GetFullErrorChainForError(error) lastObject];
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}
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NSError* ErrorWithAppendedUnderlyingError(NSError* original_error,
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NSError* underlying_error) {
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DCHECK(original_error);
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DCHECK(underlying_error);
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NSArray* error_chain = GetFullErrorChainForError(original_error);
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NSError* current_error = underlying_error;
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for (NSInteger idx = error_chain.count - 1; idx >= 0; --idx) {
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NSError* error = error_chain[idx];
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scoped_nsobject<NSMutableDictionary> user_info(
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[error.userInfo mutableCopy]);
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[user_info setObject:current_error forKey:NSUnderlyingErrorKey];
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current_error = [NSError errorWithDomain:error.domain
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code:error.code
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userInfo:user_info];
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}
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return current_error;
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}
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} // namespace ios
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} // namespace base
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