1/*
2 * Copyright 2011 Google Inc. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SFNTLY_CPP_SRC_SFNTLY_DATA_MEMORY_BYTE_ARRAY_H_
18#define SFNTLY_CPP_SRC_SFNTLY_DATA_MEMORY_BYTE_ARRAY_H_
19
20#include "sfntly/data/byte_array.h"
21
22namespace sfntly {
23
24class MemoryByteArray : public ByteArray, public RefCounted<MemoryByteArray> {
25 public:
26  // Construct a new MemoryByteArray with a new array of the size given. It is
27  // assumed that none of the array is filled and readable.
28  explicit MemoryByteArray(int32_t length);
29
30  // Note: not implemented due to dangerous operations in constructor.
31  //explicit MemoryByteArray(ByteVector* b);
32
33  // Construct a new MemoryByteArray using byte array.
34  // @param b the byte array that provides the actual storage
35  // @param filled_length the index of the last byte in the array has data
36  // Note: This is different from Java version, it does not take over the
37  //       ownership of b.  Caller is responsible for handling the lifetime
38  //       of b.  C++ port also assumes filled_length is buffer_length since
39  //       there is not a reliable way to identify the actual size of buffer.
40  MemoryByteArray(byte_t* b, int32_t filled_length);
41
42  virtual ~MemoryByteArray();
43  virtual int32_t CopyTo(OutputStream* os, int32_t offset, int32_t length);
44
45  // Make gcc -Woverloaded-virtual happy.
46  virtual int32_t CopyTo(ByteArray* array) { return ByteArray::CopyTo(array); }
47  virtual int32_t CopyTo(ByteArray* array, int32_t offset, int32_t length) {
48    return ByteArray::CopyTo(array, offset, length);
49  }
50  virtual int32_t CopyTo(int32_t dst_offset,
51                         ByteArray* array,
52                         int32_t src_offset,
53                         int32_t length) {
54    return ByteArray::CopyTo(dst_offset, array, src_offset, length);
55  }
56  virtual int32_t CopyTo(OutputStream* os) { return ByteArray::CopyTo(os); }
57
58 protected:
59  virtual void InternalPut(int32_t index, byte_t b);
60  virtual int32_t InternalPut(int32_t index,
61                              byte_t* b,
62                              int32_t offset,
63                              int32_t length);
64  virtual byte_t InternalGet(int32_t index);
65  virtual int32_t InternalGet(int32_t index,
66                              byte_t* b,
67                              int32_t offset,
68                              int32_t length);
69  virtual void Close();
70  virtual byte_t* Begin();
71
72 private:
73  void Init();  // C++ port only, used to allocate memory outside constructor.
74
75  byte_t* b_;
76  bool allocated_;
77};
78
79}  // namespace sfntly
80
81#endif  // SFNTLY_CPP_SRC_SFNTLY_DATA_MEMORY_BYTE_ARRAY_H_
82