1 /* 2 * Copyright 2014 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 #ifndef IMG_UTILS_OUTPUT_H 18 #define IMG_UTILS_OUTPUT_H 19 20 #include <cutils/compiler.h> 21 #include <utils/Errors.h> 22 #include <stdint.h> 23 24 namespace android { 25 namespace img_utils { 26 27 /** 28 * Utility class used to output bytes. 29 */ 30 class ANDROID_API Output { 31 public: 32 virtual ~Output(); 33 34 /** 35 * Open this Output. 36 * 37 * Returns OK on success, or a negative error code. 38 */ 39 virtual status_t open(); 40 41 /** 42 * Write bytes from the given buffer. The number of bytes given in the count 43 * argument will be written. Bytes will be written from the given buffer starting 44 * at the index given in the offset argument. 45 * 46 * Returns OK on success, or a negative error code. 47 */ 48 virtual status_t write(const uint8_t* buf, size_t offset, size_t count) = 0; 49 50 /** 51 * Close this Output. It is not valid to call open on a previously closed Output. 52 * 53 * Returns OK on success, or a negative error code. 54 */ 55 virtual status_t close(); 56 }; 57 58 } /*namespace img_utils*/ 59 } /*namespace android*/ 60 61 #endif /*IMG_UTILS_OUTPUT_H*/ 62