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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/itunes_xml_utils.h"
#include <string>
#include "base/logging.h"
#include "third_party/libxml/chromium/libxml_utils.h"
namespace itunes {
bool SkipToNextElement(XmlReader* reader) {
if (!reader->SkipToElement()) {
// SkipToElement returns false if the current node is an end element,
// try to advance to the next element and then try again.
if (!reader->Read() || !reader->SkipToElement())
return false;
}
return true;
}
bool SeekToNodeAtCurrentDepth(XmlReader* reader, const std::string& name) {
int depth = reader->Depth();
do {
if (!SkipToNextElement(reader) || reader->Depth() < depth)
return false;
DCHECK_EQ(depth, reader->Depth());
if (reader->NodeName() == name)
return true;
} while (reader->Next());
return false;
}
bool SeekInDict(XmlReader* reader, const std::string& key) {
DCHECK_EQ("dict", reader->NodeName());
int dict_content_depth = reader->Depth() + 1;
// Advance past the dict node and into the body of the dictionary.
if (!reader->Read())
return false;
while (reader->Depth() >= dict_content_depth) {
if (!SeekToNodeAtCurrentDepth(reader, "key"))
return false;
std::string found_key;
if (!reader->ReadElementContent(&found_key))
return false;
DCHECK_EQ(dict_content_depth, reader->Depth());
if (found_key == key)
return true;
}
return false;
}
} // namespace itunes
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