1e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk/* 2e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * Copyright 2014 The Android Open Source Project 3e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * 4e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * Licensed under the Apache License, Version 2.0 (the "License"); 5e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * you may not use this file except in compliance with the License. 6e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * You may obtain a copy of the License at 7e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * 8e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * http://www.apache.org/licenses/LICENSE-2.0 9e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * 10e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * Unless required by applicable law or agreed to in writing, software 11e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * distributed under the License is distributed on an "AS IS" BASIS, 12e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * See the License for the specific language governing permissions and 14e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk * limitations under the License. 15e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk */ 16e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 17e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk#include <img_utils/Input.h> 18e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 19e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunknamespace android { 20e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunknamespace img_utils { 21e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 22e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben BrunkInput::~Input() {} 234510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk 24e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkstatus_t Input::open() { return OK; } 254510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk 26e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunkstatus_t Input::close() { return OK; } 27e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 284510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunkssize_t Input::skip(size_t count) { 294510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk const size_t SKIP_BUF_SIZE = 1024; 304510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk uint8_t skipBuf[SKIP_BUF_SIZE]; 314510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk 324510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk size_t remaining = count; 334510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk while (remaining > 0) { 344510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk size_t amt = (SKIP_BUF_SIZE > remaining) ? remaining : SKIP_BUF_SIZE; 354510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk ssize_t ret = read(skipBuf, 0, amt); 364510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk if (ret < 0) { 374510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk if(ret == NOT_ENOUGH_DATA) { 384510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk // End of file encountered 394510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk if (remaining == count) { 404510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk // Read no bytes, return EOF 414510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk return NOT_ENOUGH_DATA; 424510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk } else { 434510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk // Return num bytes read 444510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk return count - remaining; 454510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk } 464510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk } 474510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk // Return error code. 484510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk return ret; 494510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk } 504510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk remaining -= ret; 514510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk } 524510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk return count; 534510de26e5361f3a9f07057ec6f26483c888c1faRuben Brunk} 54e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 55e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} /*namespace img_utils*/ 56e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk} /*namespace android*/ 57e507721000647a7d8afe44c63ef7fd04ef8971b1Ruben Brunk 58