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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef SharedBufferChunkReader_h
32#define SharedBufferChunkReader_h
33
34#include "platform/PlatformExport.h"
35#include "wtf/Vector.h"
36#include "wtf/text/WTFString.h"
37
38namespace blink {
39
40class SharedBuffer;
41
42class PLATFORM_EXPORT SharedBufferChunkReader {
43public:
44    SharedBufferChunkReader(SharedBuffer*, const Vector<char>& separator);
45    SharedBufferChunkReader(SharedBuffer*, const char* separator);
46
47    void setSeparator(const Vector<char>&);
48    void setSeparator(const char*);
49
50    // Returns false when the end of the buffer was reached.
51    bool nextChunk(Vector<char>& data, bool includeSeparator = false);
52
53    // Returns a null string when the end of the buffer has been reached.
54    String nextChunkAsUTF8StringWithLatin1Fallback(bool includeSeparator = false);
55
56    // Reads size bytes at the current location in the buffer, without changing the buffer position.
57    // Returns the number of bytes read. That number might be less than the specified size if the end of the buffer was reached.
58    size_t peek(Vector<char>&, size_t);
59
60private:
61    SharedBuffer* m_buffer;
62    size_t m_bufferPosition;
63    const char* m_segment;
64    size_t m_segmentLength;
65    size_t m_segmentIndex;
66    bool m_reachedEndOfFile;
67    Vector<char> m_separator;
68    size_t m_separatorIndex;
69};
70
71}
72
73#endif
74