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

// Copyright 2016 The PDFium Authors
// 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 "core/fpdfapi/parser/cpdf_linearized_header.h"

#include <algorithm>
#include <limits>
#include <utility>

#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_number.h"
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "core/fpdfapi/parser/cpdf_syntax_parser.h"
#include "core/fxcrt/check.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/ptr_util.h"

namespace {

constexpr FX_FILESIZE kLinearizedHeaderOffset = …;
constexpr size_t kMaxInt = …;

template <class T>
bool IsValidNumericDictionaryValue(const CPDF_Dictionary* pDict,
                                   const ByteString& key,
                                   T min_value,
                                   bool must_exist = true) { … }

bool IsLinearizedHeaderValid(const CPDF_LinearizedHeader* header,
                             FX_FILESIZE document_size) { … }

}  // namespace

// static
std::unique_ptr<CPDF_LinearizedHeader> CPDF_LinearizedHeader::Parse(
    CPDF_SyntaxParser* parser) { … }

CPDF_LinearizedHeader::CPDF_LinearizedHeader(const CPDF_Dictionary* pDict,
                                             FX_FILESIZE szLastXRefOffset)
    : … { … }

CPDF_LinearizedHeader::~CPDF_LinearizedHeader() = default;

bool CPDF_LinearizedHeader::HasHintTable() const { … }