chromium/third_party/pdfium/core/fpdfapi/parser/cpdf_read_validator.cpp

// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "core/fpdfapi/parser/cpdf_read_validator.h"

#include <algorithm>
#include <utility>

#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/notreached.h"

namespace {

constexpr FX_FILESIZE kAlignBlockValue = …;

FX_FILESIZE AlignDown(FX_FILESIZE offset) { … }

FX_FILESIZE AlignUp(FX_FILESIZE offset) { … }

}  // namespace

CPDF_ReadValidator::ScopedSession::ScopedSession(
    RetainPtr<CPDF_ReadValidator> validator)
    : … { … }

CPDF_ReadValidator::ScopedSession::~ScopedSession() { … }

CPDF_ReadValidator::CPDF_ReadValidator(
    RetainPtr<IFX_SeekableReadStream> file_read,
    CPDF_DataAvail::FileAvail* file_avail)
    : … { … }

CPDF_ReadValidator::~CPDF_ReadValidator() = default;

void CPDF_ReadValidator::ResetErrors() { … }

bool CPDF_ReadValidator::ReadBlockAtOffset(pdfium::span<uint8_t> buffer,
                                           FX_FILESIZE offset) { … }

FX_FILESIZE CPDF_ReadValidator::GetSize() { … }

void CPDF_ReadValidator::ScheduleDownload(FX_FILESIZE offset, size_t size) { … }

bool CPDF_ReadValidator::IsDataRangeAvailable(FX_FILESIZE offset,
                                              size_t size) const { … }

bool CPDF_ReadValidator::IsWholeFileAvailable() { … }

bool CPDF_ReadValidator::CheckDataRangeAndRequestIfUnavailable(
    FX_FILESIZE offset,
    size_t size) { … }

bool CPDF_ReadValidator::CheckWholeFileAndRequestIfUnavailable() { … }