in_memory_wrapper_input.cpp revision 7cd4c49d575478b2380f129dcd376a4e5e37939c
17cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines/* 27cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * Copyright 2012, The Android Open Source Project 37cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * 47cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * Licensed under the Apache License, Version 2.0 (the "License"); 57cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * you may not use this file except in compliance with the License. 67cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * You may obtain a copy of the License at 77cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * 87cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * http://www.apache.org/licenses/LICENSE-2.0 97cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * 107cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * Unless required by applicable law or agreed to in writing, software 117cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * distributed under the License is distributed on an "AS IS" BASIS, 127cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 137cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * See the License for the specific language governing permissions and 147cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * limitations under the License. 157cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines */ 167cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 177cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#include <sys/stat.h> 187cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#include <stdlib.h> 197cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 207cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#include "bcinfo/Wrap/in_memory_wrapper_input.h" 217cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 227cd4c49d575478b2380f129dcd376a4e5e37939cStephen HinesInMemoryWrapperInput::InMemoryWrapperInput(const char* buffer, size_t size) : 237cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines _buffer(buffer), _pos(0), _size(size) { 247cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines} 257cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 267cd4c49d575478b2380f129dcd376a4e5e37939cStephen HinesInMemoryWrapperInput::~InMemoryWrapperInput() { 277cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines} 287cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 297cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hinessize_t InMemoryWrapperInput::Read(uint8_t* buffer, size_t wanted) { 307cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines size_t found = 0; 317cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines while (found < wanted) { 327cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines if (_pos >= _size) { 337cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines return found; 347cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines } 357cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines buffer[found++] = _buffer[_pos++]; 367cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines } 377cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines return found; 387cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines} 397cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 407cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hinesbool InMemoryWrapperInput::AtEof() { 417cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines return (_pos >= _size); 427cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines} 437cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 447cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hinesoff_t InMemoryWrapperInput::Size() { 457cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines return _size; 467cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines} 477cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 487cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hinesbool InMemoryWrapperInput::Seek(uint32_t pos) { 497cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines if (pos < _size) { 507cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines _pos = pos; 517cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines return true; 527cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines } else { 537cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines return false; 547cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines } 557cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines} 56