// Copyright 2017 PDFium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com #include "xfa/fxfa/cxfa_fileread.h" #include <algorithm> #include "core/fpdfapi/parser/cpdf_stream_acc.h" #include "third_party/base/logging.h" #include "third_party/base/stl_util.h" CXFA_FileRead::CXFA_FileRead(const std::vector<CPDF_Stream*>& streams) { for (CPDF_Stream* pStream : streams) { m_Data.push_back(pdfium::MakeRetain<CPDF_StreamAcc>(pStream)); m_Data.back()->LoadAllData(); } } CXFA_FileRead::~CXFA_FileRead() {} FX_FILESIZE CXFA_FileRead::GetSize() { uint32_t dwSize = 0; for (const auto& acc : m_Data) dwSize += acc->GetSize(); return dwSize; } bool CXFA_FileRead::ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) { int32_t iCount = pdfium::CollectionSize<int32_t>(m_Data); int32_t index = 0; while (index < iCount) { const auto& acc = m_Data[index]; FX_FILESIZE dwSize = acc->GetSize(); if (offset < dwSize) break; offset -= dwSize; index++; } while (index < iCount) { const auto& acc = m_Data[index]; uint32_t dwSize = acc->GetSize(); size_t dwRead = std::min(size, static_cast<size_t>(dwSize - offset)); memcpy(buffer, acc->GetData() + offset, dwRead); size -= dwRead; if (size == 0) return true; buffer = static_cast<uint8_t*>(buffer) + dwRead; offset = 0; index++; } return false; } size_t CXFA_FileRead::ReadBlock(void* buffer, size_t size) { NOTREACHED(); return 0; } FX_FILESIZE CXFA_FileRead::GetPosition() { return 0; } bool CXFA_FileRead::IsEOF() { return false; } bool CXFA_FileRead::Flush() { NOTREACHED(); return false; } bool CXFA_FileRead::WriteBlock(const void* pData, FX_FILESIZE offset, size_t size) { NOTREACHED(); return false; }