keunyoung | b85b275 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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 | #ifndef _FIXED_BUFFER_H |
| 17 | #define _FIXED_BUFFER_H |
| 18 | |
Luca Stefani | 1cb647a | 2019-03-07 21:58:17 +0100 | [diff] [blame] | 19 | #if PLATFORM_SDK_VERSION < 26 |
Logan Chien | d7bf00d | 2018-09-21 06:30:09 +0000 | [diff] [blame] | 20 | #include <cutils/log.h> |
Luca Stefani | 1cb647a | 2019-03-07 21:58:17 +0100 | [diff] [blame] | 21 | #else |
| 22 | #include <log/log.h> |
| 23 | #endif |
Lingfeng Yang | d3ae106 | 2017-01-18 11:42:04 -0800 | [diff] [blame] | 24 | |
keunyoung | b85b275 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 25 | class FixedBuffer { |
| 26 | public: |
| 27 | FixedBuffer(size_t initialSize = 0) { |
| 28 | m_buffer = NULL; |
David 'Digit' Turner | e01d5f4 | 2014-10-30 21:32:28 +0100 | [diff] [blame] | 29 | m_bufferLen = initialSize; |
keunyoung | b85b275 | 2013-03-08 12:28:03 -0800 | [diff] [blame] | 30 | alloc(m_bufferLen); |
| 31 | } |
| 32 | |
| 33 | ~FixedBuffer() { |
| 34 | delete [] m_buffer; |
| 35 | m_bufferLen = 0; |
| 36 | } |
| 37 | |
| 38 | void * alloc(size_t size) { |
| 39 | if (m_bufferLen >= size) |
| 40 | return (void *)(m_buffer); |
| 41 | |
| 42 | if (m_buffer != NULL) |
| 43 | delete[] m_buffer; |
| 44 | |
| 45 | m_bufferLen = size; |
| 46 | m_buffer = new unsigned char[m_bufferLen]; |
| 47 | if (m_buffer == NULL) |
| 48 | m_bufferLen = 0; |
| 49 | |
| 50 | return m_buffer; |
| 51 | } |
| 52 | void *ptr() { return m_buffer; } |
| 53 | size_t len() { return m_bufferLen; } |
| 54 | private: |
| 55 | unsigned char *m_buffer; |
| 56 | size_t m_bufferLen; |
| 57 | }; |
| 58 | |
| 59 | #endif |