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#include "sfntly/data/memory_byte_array.h"
18
19#include <string.h>
20
21namespace sfntly {
22
23MemoryByteArray::MemoryByteArray(int32_t length)
24    : ByteArray(0, length), b_(NULL), allocated_(true) {
25}
26
27MemoryByteArray::MemoryByteArray(byte_t* b, int32_t filled_length)
28    : ByteArray(filled_length, filled_length), b_(b), allocated_(false) {
29  assert(b);
30}
31
32MemoryByteArray::~MemoryByteArray() {
33  Close();
34}
35
36int32_t MemoryByteArray::CopyTo(OutputStream* os,
37                                int32_t offset,
38                                int32_t length) {
39  assert(os);
40  os->Write(b_, offset, length);
41  return length;
42}
43
44void MemoryByteArray::Init() {
45  if (allocated_ && b_ == NULL) {
46    b_ = new byte_t[Size()];
47    memset(b_, 0, Size());
48  }
49}
50
51void MemoryByteArray::InternalPut(int32_t index, byte_t b) {
52  Init();
53  b_[index] = b;
54}
55
56int32_t MemoryByteArray::InternalPut(int32_t index,
57                                     byte_t* b,
58                                     int32_t offset,
59                                     int32_t length) {
60  assert(b);
61  Init();
62  memcpy(b_ + index, b + offset, length);
63  return length;
64}
65
66byte_t MemoryByteArray::InternalGet(int32_t index) {
67  Init();
68  return b_[index];
69}
70
71int32_t MemoryByteArray::InternalGet(int32_t index,
72                                     byte_t* b,
73                                     int32_t offset,
74                                     int32_t length) {
75  assert(b);
76  Init();
77  memcpy(b + offset, b_ + index, length);
78  return length;
79}
80
81void MemoryByteArray::Close() {
82  if (allocated_ && b_) {
83    delete[] b_;
84  }
85  b_ = NULL;
86}
87
88byte_t* MemoryByteArray::Begin() {
89  Init();
90  return b_;
91}
92
93}  // namespace sfntly
94