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// 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.
#include "testing/fake_file_access.h"
#include <algorithm>
#include <set>
#include <utility>
#include <vector>
#include "core/fxcrt/fx_system.h"
#include "third_party/base/ptr_util.h"
namespace {
class FileAccessWrapper : public FPDF_FILEACCESS {
public:
explicit FileAccessWrapper(FakeFileAccess* simulator)
: simulator_(simulator) {
m_FileLen = simulator_->GetFileSize();
m_GetBlock = &GetBlockImpl;
m_Param = this;
}
static int GetBlockImpl(void* param,
unsigned long position,
unsigned char* pBuf,
unsigned long size) {
return static_cast<FileAccessWrapper*>(param)->simulator_->GetBlock(
position, pBuf, size);
}
private:
fxcrt::UnownedPtr<FakeFileAccess> simulator_;
};
class FileAvailImpl : public FX_FILEAVAIL {
public:
explicit FileAvailImpl(FakeFileAccess* simulator) : simulator_(simulator) {
version = 1;
IsDataAvail = &IsDataAvailImpl;
}
static FPDF_BOOL IsDataAvailImpl(FX_FILEAVAIL* pThis,
size_t offset,
size_t size) {
return static_cast<FileAvailImpl*>(pThis)->simulator_->IsDataAvail(offset,
size);
}
private:
fxcrt::UnownedPtr<FakeFileAccess> simulator_;
};
class DownloadHintsImpl : public FX_DOWNLOADHINTS {
public:
explicit DownloadHintsImpl(FakeFileAccess* simulator)
: simulator_(simulator) {
version = 1;
AddSegment = &AddSegmentImpl;
}
static void AddSegmentImpl(FX_DOWNLOADHINTS* pThis,
size_t offset,
size_t size) {
return static_cast<DownloadHintsImpl*>(pThis)->simulator_->AddSegment(
offset, size);
}
private:
fxcrt::UnownedPtr<FakeFileAccess> simulator_;
};
} // namespace
FakeFileAccess::FakeFileAccess(FPDF_FILEACCESS* file_access)
: file_access_(file_access),
file_access_wrapper_(pdfium::MakeUnique<FileAccessWrapper>(this)),
file_avail_(pdfium::MakeUnique<FileAvailImpl>(this)),
download_hints_(pdfium::MakeUnique<DownloadHintsImpl>(this)) {
ASSERT(file_access_);
}
FakeFileAccess::~FakeFileAccess() {}
FPDF_BOOL FakeFileAccess::IsDataAvail(size_t offset, size_t size) const {
return available_data_.Contains(RangeSet::Range(offset, offset + size));
}
void FakeFileAccess::AddSegment(size_t offset, size_t size) {
requested_data_.Union(RangeSet::Range(offset, offset + size));
}
unsigned long FakeFileAccess::GetFileSize() {
return file_access_->m_FileLen;
}
int FakeFileAccess::GetBlock(unsigned long position,
unsigned char* pBuf,
unsigned long size) {
if (!IsDataAvail(static_cast<size_t>(position), static_cast<size_t>(size)))
return false;
return file_access_->m_GetBlock(file_access_->m_Param, position, pBuf, size);
}
void FakeFileAccess::SetRequestedDataAvailable() {
available_data_.Union(requested_data_);
requested_data_.Clear();
}
void FakeFileAccess::SetWholeFileAvailable() {
available_data_.Union(RangeSet::Range(0, static_cast<size_t>(GetFileSize())));
requested_data_.Clear();
}
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