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120 lines
3.4 KiB
120 lines
3.4 KiB
// Copyright 2017 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "testing/fake_file_access.h"
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#include <algorithm>
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#include <set>
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#include <utility>
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#include <vector>
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#include "core/fxcrt/fx_system.h"
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#include "third_party/base/ptr_util.h"
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namespace {
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class FileAccessWrapper final : public FPDF_FILEACCESS {
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public:
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explicit FileAccessWrapper(FakeFileAccess* simulator)
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: simulator_(simulator) {
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m_FileLen = simulator_->GetFileSize();
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m_GetBlock = &GetBlockImpl;
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m_Param = this;
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}
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static int GetBlockImpl(void* param,
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unsigned long position,
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unsigned char* pBuf,
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unsigned long size) {
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return static_cast<FileAccessWrapper*>(param)->simulator_->GetBlock(
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position, pBuf, size);
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}
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private:
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UnownedPtr<FakeFileAccess> simulator_;
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};
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class FileAvailImpl final : public FX_FILEAVAIL {
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public:
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explicit FileAvailImpl(FakeFileAccess* simulator) : simulator_(simulator) {
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version = 1;
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IsDataAvail = &IsDataAvailImpl;
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}
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static FPDF_BOOL IsDataAvailImpl(FX_FILEAVAIL* pThis,
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size_t offset,
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size_t size) {
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return static_cast<FileAvailImpl*>(pThis)->simulator_->IsDataAvail(offset,
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size);
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}
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private:
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UnownedPtr<FakeFileAccess> simulator_;
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};
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class DownloadHintsImpl final : public FX_DOWNLOADHINTS {
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public:
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explicit DownloadHintsImpl(FakeFileAccess* simulator)
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: simulator_(simulator) {
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version = 1;
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AddSegment = &AddSegmentImpl;
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}
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static void AddSegmentImpl(FX_DOWNLOADHINTS* pThis,
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size_t offset,
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size_t size) {
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return static_cast<DownloadHintsImpl*>(pThis)->simulator_->AddSegment(
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offset, size);
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}
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private:
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UnownedPtr<FakeFileAccess> simulator_;
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};
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} // namespace
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FakeFileAccess::FakeFileAccess(FPDF_FILEACCESS* file_access)
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: file_access_(file_access),
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file_access_wrapper_(pdfium::MakeUnique<FileAccessWrapper>(this)),
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file_avail_(pdfium::MakeUnique<FileAvailImpl>(this)),
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download_hints_(pdfium::MakeUnique<DownloadHintsImpl>(this)) {
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ASSERT(file_access_);
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}
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FakeFileAccess::~FakeFileAccess() {}
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FPDF_BOOL FakeFileAccess::IsDataAvail(size_t offset, size_t size) const {
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return available_data_.Contains(RangeSet::Range(offset, offset + size));
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}
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void FakeFileAccess::AddSegment(size_t offset, size_t size) {
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requested_data_.Union(RangeSet::Range(offset, offset + size));
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}
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unsigned long FakeFileAccess::GetFileSize() {
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return file_access_->m_FileLen;
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}
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int FakeFileAccess::GetBlock(unsigned long position,
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unsigned char* pBuf,
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unsigned long size) {
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if (!pBuf || !size)
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return false;
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if (!IsDataAvail(static_cast<size_t>(position), static_cast<size_t>(size)))
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return false;
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return file_access_->m_GetBlock(file_access_->m_Param, position, pBuf, size);
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}
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void FakeFileAccess::SetRequestedDataAvailable() {
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available_data_.Union(requested_data_);
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requested_data_.Clear();
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}
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void FakeFileAccess::SetWholeFileAvailable() {
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available_data_.Union(RangeSet::Range(0, static_cast<size_t>(GetFileSize())));
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requested_data_.Clear();
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}
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