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      1 /*
      2  * Copyright (C) 2011 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "LevelDBIterator.h"
     28 
     29 #if ENABLE(LEVELDB)
     30 
     31 #include <leveldb/iterator.h>
     32 #include <leveldb/slice.h>
     33 #include <wtf/text/CString.h>
     34 #include <wtf/text/WTFString.h>
     35 
     36 namespace WebCore {
     37 
     38 LevelDBIterator::~LevelDBIterator()
     39 {
     40 }
     41 
     42 LevelDBIterator::LevelDBIterator(leveldb::Iterator* it)
     43     : m_iterator(it)
     44 {
     45 }
     46 
     47 static leveldb::Slice makeSlice(const Vector<char>& value)
     48 {
     49     return leveldb::Slice(value.data(), value.size());
     50 }
     51 
     52 static LevelDBSlice makeLevelDBSlice(leveldb::Slice s)
     53 {
     54     return LevelDBSlice(s.data(), s.data() + s.size());
     55 }
     56 
     57 bool LevelDBIterator::isValid() const
     58 {
     59     return m_iterator->Valid();
     60 }
     61 
     62 void LevelDBIterator::seekToLast()
     63 {
     64     m_iterator->SeekToLast();
     65 }
     66 
     67 void LevelDBIterator::seek(const Vector<char>& target)
     68 {
     69     m_iterator->Seek(makeSlice(target));
     70 }
     71 
     72 void LevelDBIterator::next()
     73 {
     74     m_iterator->Next();
     75 }
     76 
     77 void LevelDBIterator::prev()
     78 {
     79     m_iterator->Prev();
     80 }
     81 
     82 LevelDBSlice LevelDBIterator::key() const
     83 {
     84     return makeLevelDBSlice(m_iterator->key());
     85 }
     86 
     87 LevelDBSlice LevelDBIterator::value() const
     88 {
     89     return makeLevelDBSlice(m_iterator->value());
     90 }
     91 
     92 } // namespace WebCore
     93 
     94 #endif // ENABLE(LEVELDB)
     95