Line data    Source code

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