1 /*
2 * Copyright 2012, The Android Open Source Project
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 <sys/stat.h>
18 #include <stdlib.h>
19
20 #include "bcinfo/Wrap/in_memory_wrapper_input.h"
21
InMemoryWrapperInput(const char * buffer,size_t size)22 InMemoryWrapperInput::InMemoryWrapperInput(const char* buffer, size_t size) :
23 _buffer(buffer), _pos(0), _size(size) {
24 }
25
~InMemoryWrapperInput()26 InMemoryWrapperInput::~InMemoryWrapperInput() {
27 }
28
Read(uint8_t * buffer,size_t wanted)29 size_t InMemoryWrapperInput::Read(uint8_t* buffer, size_t wanted) {
30 size_t found = 0;
31
32 if (!buffer) {
33 return 0;
34 }
35
36 while (found < wanted) {
37 if (_pos >= _size) {
38 return found;
39 }
40 buffer[found++] = _buffer[_pos++];
41 }
42 return found;
43 }
44
AtEof()45 bool InMemoryWrapperInput::AtEof() {
46 return (_pos >= _size);
47 }
48
Size()49 off_t InMemoryWrapperInput::Size() {
50 return _size;
51 }
52
Seek(uint32_t pos)53 bool InMemoryWrapperInput::Seek(uint32_t pos) {
54 if (pos < _size) {
55 _pos = pos;
56 return true;
57 } else {
58 return false;
59 }
60 }
61