// Copyright 2014 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 "editint.h"

#include "core/include/fxcrt/fx_ext.h"
#include "core/include/fpdfapi/fpdf_serial.h"
#include "core/include/fpdfapi/fpdf_parser.h"

#define PDF_OBJECTSTREAM_MAXLENGTH (256 * 1024)
#define PDF_XREFSTREAM_MAXSIZE 10000

int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
                                CFX_FileBufferArchive* pFile,
                                FX_FILESIZE& offset) {
  int32_t len = 0;
  if (pObj == NULL) {
    if (pFile->AppendString(FX_BSTRC(" null")) < 0) {
      return -1;
    }
    offset += 5;
    return 1;
  }
  switch (pObj->GetType()) {
    case PDFOBJ_NULL:
      if (pFile->AppendString(FX_BSTRC(" null")) < 0) {
        return -1;
      }
      offset += 5;
      break;
    case PDFOBJ_BOOLEAN:
    case PDFOBJ_NUMBER:
      if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
        return -1;
      }
      if ((len = pFile->AppendString(pObj->GetString())) < 0) {
        return -1;
      }
      offset += len + 1;
      break;
    case PDFOBJ_STRING: {
      CFX_ByteString str = pObj->GetString();
      FX_BOOL bHex = pObj->AsString()->IsHex();
      if ((len = pFile->AppendString(PDF_EncodeString(str, bHex))) < 0) {
        return -1;
      }
      offset += len;
      break;
    }
    case PDFOBJ_NAME: {
      if (pFile->AppendString(FX_BSTRC("/")) < 0) {
        return -1;
      }
      CFX_ByteString str = pObj->GetString();
      if ((len = pFile->AppendString(PDF_NameEncode(str))) < 0) {
        return -1;
      }
      offset += len + 1;
      break;
    }
    case PDFOBJ_REFERENCE: {
      if (pFile->AppendString(FX_BSTRC(" ")) < 0)
        return -1;
      if ((len = pFile->AppendDWord(pObj->AsReference()->GetRefObjNum())) < 0)
        return -1;
      if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0)
        return -1;
      offset += len + 6;
      break;
    }
    case PDFOBJ_ARRAY: {
      if (pFile->AppendString(FX_BSTRC("[")) < 0) {
        return -1;
      }
      offset += 1;
      const CPDF_Array* p = pObj->AsArray();
      for (FX_DWORD i = 0; i < p->GetCount(); i++) {
        CPDF_Object* pElement = p->GetElement(i);
        if (pElement->GetObjNum()) {
          if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
            return -1;
          }
          if ((len = pFile->AppendDWord(pElement->GetObjNum())) < 0) {
            return -1;
          }
          if (pFile->AppendString(FX_BSTRC(" 0 R")) < 0) {
            return -1;
          }
          offset += len + 5;
        } else {
          if (PDF_CreatorAppendObject(pElement, pFile, offset) < 0) {
            return -1;
          }
        }
      }
      if (pFile->AppendString(FX_BSTRC("]")) < 0) {
        return -1;
      }
      offset += 1;
      break;
    }
    case PDFOBJ_DICTIONARY: {
      if (pFile->AppendString(FX_BSTRC("<<")) < 0) {
        return -1;
      }
      offset += 2;
      const CPDF_Dictionary* p = pObj->AsDictionary();
      FX_POSITION pos = p->GetStartPos();
      while (pos) {
        CFX_ByteString key;
        CPDF_Object* pValue = p->GetNextElement(pos, key);
        if (pFile->AppendString(FX_BSTRC("/")) < 0) {
          return -1;
        }
        if ((len = pFile->AppendString(PDF_NameEncode(key))) < 0) {
          return -1;
        }
        offset += len + 1;
        if (pValue->GetObjNum()) {
          if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
            return -1;
          }
          if ((len = pFile->AppendDWord(pValue->GetObjNum())) < 0) {
            return -1;
          }
          if (pFile->AppendString(FX_BSTRC(" 0 R")) < 0) {
            return -1;
          }
          offset += len + 5;
        } else {
          if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0) {
            return -1;
          }
        }
      }
      if (pFile->AppendString(FX_BSTRC(">>")) < 0) {
        return -1;
      }
      offset += 2;
      break;
    }
    case PDFOBJ_STREAM: {
      const CPDF_Stream* p = pObj->AsStream();
      if (PDF_CreatorAppendObject(p->GetDict(), pFile, offset) < 0) {
        return -1;
      }
      if (pFile->AppendString(FX_BSTRC("stream\r\n")) < 0) {
        return -1;
      }
      offset += 8;
      CPDF_StreamAcc acc;
      acc.LoadAllData(p, TRUE);
      if (pFile->AppendBlock(acc.GetData(), acc.GetSize()) < 0) {
        return -1;
      }
      offset += acc.GetSize();
      if ((len = pFile->AppendString(FX_BSTRC("\r\nendstream"))) < 0) {
        return -1;
      }
      offset += len;
      break;
    }
    default:
      ASSERT(FALSE);
      break;
  }
  return 1;
}
int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument,
                                CFX_FileBufferArchive* pFile,
                                CPDF_Array* pIDArray,
                                FX_BOOL bCompress) {
  FX_FILESIZE offset = 0;
  int32_t len = 0;
  FXSYS_assert(pDocument && pFile);
  CPDF_Parser* pParser = (CPDF_Parser*)pDocument->GetParser();
  if (pParser) {
    CPDF_Dictionary* p = pParser->GetTrailer();
    FX_POSITION pos = p->GetStartPos();
    while (pos) {
      CFX_ByteString key;
      CPDF_Object* pValue = p->GetNextElement(pos, key);
      if (key == FX_BSTRC("Encrypt") || key == FX_BSTRC("Size") ||
          key == FX_BSTRC("Filter") || key == FX_BSTRC("Index") ||
          key == FX_BSTRC("Length") || key == FX_BSTRC("Prev") ||
          key == FX_BSTRC("W") || key == FX_BSTRC("XRefStm") ||
          key == FX_BSTRC("Type") || key == FX_BSTRC("ID")) {
        continue;
      }
      if (bCompress && key == FX_BSTRC("DecodeParms")) {
        continue;
      }
      if (pFile->AppendString((FX_BSTRC("/"))) < 0) {
        return -1;
      }
      if ((len = pFile->AppendString(PDF_NameEncode(key))) < 0) {
        return -1;
      }
      offset += len + 1;
      if (pValue->GetObjNum()) {
        if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
          return -1;
        }
        if ((len = pFile->AppendDWord(pValue->GetObjNum())) < 0) {
          return -1;
        }
        if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0) {
          return -1;
        }
        offset += len + 6;
      } else {
        if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0) {
          return -1;
        }
      }
    }
    if (pIDArray) {
      if (pFile->AppendString((FX_BSTRC("/ID"))) < 0) {
        return -1;
      }
      offset += 3;
      if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0) {
        return -1;
      }
    }
    return offset;
  }
  if (pFile->AppendString(FX_BSTRC("\r\n/Root ")) < 0) {
    return -1;
  }
  if ((len = pFile->AppendDWord(pDocument->GetRoot()->GetObjNum())) < 0) {
    return -1;
  }
  if (pFile->AppendString(FX_BSTRC(" 0 R\r\n")) < 0) {
    return -1;
  }
  offset += len + 14;
  if (pDocument->GetInfo()) {
    if (pFile->AppendString(FX_BSTRC("/Info ")) < 0) {
      return -1;
    }
    if ((len = pFile->AppendDWord(pDocument->GetInfo()->GetObjNum())) < 0) {
      return -1;
    }
    if (pFile->AppendString(FX_BSTRC(" 0 R\r\n")) < 0) {
      return -1;
    }
    offset += len + 12;
  }
  if (pIDArray) {
    if (pFile->AppendString((FX_BSTRC("/ID"))) < 0) {
      return -1;
    }
    offset += 3;
    if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0) {
      return -1;
    }
  }
  return offset;
}
int32_t PDF_CreatorWriteEncrypt(const CPDF_Dictionary* pEncryptDict,
                                FX_DWORD dwObjNum,
                                CFX_FileBufferArchive* pFile) {
  if (!pEncryptDict) {
    return 0;
  }
  FXSYS_assert(pFile);
  FX_FILESIZE offset = 0;
  int32_t len = 0;
  if (pFile->AppendString(FX_BSTRC("/Encrypt")) < 0) {
    return -1;
  }
  offset += 8;
  if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
    return -1;
  }
  if ((len = pFile->AppendDWord(dwObjNum)) < 0) {
    return -1;
  }
  if (pFile->AppendString(FX_BSTRC(" 0 R ")) < 0) {
    return -1;
  }
  offset += len + 6;
  return offset;
}
FX_BOOL PDF_GenerateFileID(FX_DWORD dwSeed1,
                           FX_DWORD dwSeed2,
                           FX_DWORD* pBuffer) {
  if (!pBuffer) {
    return FALSE;
  }
  void* pContext = FX_Random_MT_Start(dwSeed1);
  int32_t i = 0;
  for (i = 0; i < 2; i++) {
    *pBuffer++ = FX_Random_MT_Generate(pContext);
  }
  FX_Random_MT_Close(pContext);
  pContext = FX_Random_MT_Start(dwSeed2);
  for (i = 0; i < 2; i++) {
    *pBuffer++ = FX_Random_MT_Generate(pContext);
  }
  FX_Random_MT_Close(pContext);
  return TRUE;
}
class CPDF_FlateEncoder {
 public:
  CPDF_FlateEncoder();
  ~CPDF_FlateEncoder();
  FX_BOOL Initialize(CPDF_Stream* pStream, FX_BOOL bFlateEncode);
  FX_BOOL Initialize(const uint8_t* pBuffer,
                     FX_DWORD size,
                     FX_BOOL bFlateEncode,
                     FX_BOOL bXRefStream = FALSE);
  void CloneDict();
  uint8_t* m_pData;
  FX_DWORD m_dwSize;
  CPDF_Dictionary* m_pDict;
  FX_BOOL m_bCloned;
  FX_BOOL m_bNewData;
  CPDF_StreamAcc m_Acc;
};
CPDF_FlateEncoder::CPDF_FlateEncoder() {
  m_pData = NULL;
  m_dwSize = 0;
  m_pDict = NULL;
  m_bCloned = FALSE;
  m_bNewData = FALSE;
}
void CPDF_FlateEncoder::CloneDict() {
  if (!m_bCloned) {
    m_pDict = ToDictionary(m_pDict->Clone());
    ASSERT(m_pDict);
    m_bCloned = TRUE;
  }
}
FX_BOOL CPDF_FlateEncoder::Initialize(CPDF_Stream* pStream,
                                      FX_BOOL bFlateEncode) {
  m_Acc.LoadAllData(pStream, TRUE);
  if ((pStream && pStream->GetDict() &&
       pStream->GetDict()->KeyExist("Filter")) ||
      !bFlateEncode) {
    if (pStream->GetDict()->KeyExist("Filter") && !bFlateEncode) {
      CPDF_StreamAcc destAcc;
      destAcc.LoadAllData(pStream);
      m_dwSize = destAcc.GetSize();
      m_pData = (uint8_t*)destAcc.DetachData();
      m_pDict = ToDictionary(pStream->GetDict()->Clone());
      m_pDict->RemoveAt(FX_BSTRC("Filter"));
      m_bNewData = TRUE;
      m_bCloned = TRUE;
    } else {
      m_pData = (uint8_t*)m_Acc.GetData();
      m_dwSize = m_Acc.GetSize();
      m_pDict = pStream->GetDict();
    }
    return TRUE;
  }
  m_pData = NULL;
  m_dwSize = 0;
  m_bNewData = TRUE;
  m_bCloned = TRUE;
  ::FlateEncode(m_Acc.GetData(), m_Acc.GetSize(), m_pData, m_dwSize);
  m_pDict = ToDictionary(pStream->GetDict()->Clone());
  m_pDict->SetAtInteger("Length", m_dwSize);
  m_pDict->SetAtName("Filter", "FlateDecode");
  m_pDict->RemoveAt("DecodeParms");
  return TRUE;
}
FX_BOOL CPDF_FlateEncoder::Initialize(const uint8_t* pBuffer,
                                      FX_DWORD size,
                                      FX_BOOL bFlateEncode,
                                      FX_BOOL bXRefStream) {
  if (!bFlateEncode) {
    m_pData = (uint8_t*)pBuffer;
    m_dwSize = size;
    return TRUE;
  }
  m_bNewData = TRUE;
  if (bXRefStream) {
    ::FlateEncode(pBuffer, size, 12, 1, 8, 7, m_pData, m_dwSize);
  } else {
    ::FlateEncode(pBuffer, size, m_pData, m_dwSize);
  }
  return TRUE;
}
CPDF_FlateEncoder::~CPDF_FlateEncoder() {
  if (m_bCloned && m_pDict) {
    m_pDict->Release();
  }
  if (m_bNewData) {
    FX_Free(m_pData);
  }
}
class CPDF_Encryptor {
 public:
  CPDF_Encryptor();
  ~CPDF_Encryptor();
  FX_BOOL Initialize(CPDF_CryptoHandler* pHandler,
                     int objnum,
                     uint8_t* src_data,
                     FX_DWORD src_size);
  uint8_t* m_pData;
  FX_DWORD m_dwSize;
  FX_BOOL m_bNewBuf;
};
CPDF_Encryptor::CPDF_Encryptor() {
  m_pData = NULL;
  m_dwSize = 0;
  m_bNewBuf = FALSE;
}
FX_BOOL CPDF_Encryptor::Initialize(CPDF_CryptoHandler* pHandler,
                                   int objnum,
                                   uint8_t* src_data,
                                   FX_DWORD src_size) {
  if (src_size == 0) {
    return TRUE;
  }
  if (pHandler == NULL) {
    m_pData = (uint8_t*)src_data;
    m_dwSize = src_size;
    m_bNewBuf = FALSE;
    return TRUE;
  }
  m_dwSize = pHandler->EncryptGetSize(objnum, 0, src_data, src_size);
  m_pData = FX_Alloc(uint8_t, m_dwSize);
  pHandler->EncryptContent(objnum, 0, src_data, src_size, m_pData, m_dwSize);
  m_bNewBuf = TRUE;
  return TRUE;
}
CPDF_Encryptor::~CPDF_Encryptor() {
  if (m_bNewBuf) {
    FX_Free(m_pData);
  }
}
CPDF_ObjectStream::CPDF_ObjectStream() : m_dwObjNum(0), m_index(0) {}
FX_BOOL CPDF_ObjectStream::Start() {
  m_ObjNumArray.RemoveAll();
  m_OffsetArray.RemoveAll();
  m_Buffer.Clear();
  m_dwObjNum = 0;
  m_index = 0;
  return TRUE;
}
int32_t CPDF_ObjectStream::CompressIndirectObject(FX_DWORD dwObjNum,
                                                  const CPDF_Object* pObj) {
  m_ObjNumArray.Add(dwObjNum);
  m_OffsetArray.Add(m_Buffer.GetLength());
  m_Buffer << pObj;
  return 1;
}
int32_t CPDF_ObjectStream::CompressIndirectObject(FX_DWORD dwObjNum,
                                                  const uint8_t* pBuffer,
                                                  FX_DWORD dwSize) {
  m_ObjNumArray.Add(dwObjNum);
  m_OffsetArray.Add(m_Buffer.GetLength());
  m_Buffer.AppendBlock(pBuffer, dwSize);
  return 1;
}
FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) {
  FXSYS_assert(pCreator);
  if (m_ObjNumArray.GetSize() == 0) {
    return 0;
  }
  CFX_FileBufferArchive* pFile = &pCreator->m_File;
  CPDF_CryptoHandler* pHandler = pCreator->m_pCryptoHandler;
  FX_FILESIZE ObjOffset = pCreator->m_Offset;
  if (!m_dwObjNum) {
    m_dwObjNum = ++pCreator->m_dwLastObjNum;
  }
  CFX_ByteTextBuf tempBuffer;
  int32_t iCount = m_ObjNumArray.GetSize();
  for (int32_t i = 0; i < iCount; i++) {
    tempBuffer << m_ObjNumArray.ElementAt(i) << FX_BSTRC(" ")
               << m_OffsetArray.ElementAt(i) << FX_BSTRC(" ");
  }
  FX_FILESIZE& offset = pCreator->m_Offset;
  int32_t len = pFile->AppendDWord(m_dwObjNum);
  if (len < 0) {
    return -1;
  }
  offset += len;
  if ((len = pFile->AppendString(FX_BSTRC(" 0 obj\r\n<</Type /ObjStm /N "))) <
      0) {
    return -1;
  }
  offset += len;
  if ((len = pFile->AppendDWord((FX_DWORD)iCount)) < 0) {
    return -1;
  }
  offset += len;
  if (pFile->AppendString(FX_BSTRC("/First ")) < 0) {
    return -1;
  }
  if ((len = pFile->AppendDWord((FX_DWORD)tempBuffer.GetLength())) < 0) {
    return -1;
  }
  if (pFile->AppendString(FX_BSTRC("/Length ")) < 0) {
    return -1;
  }
  offset += len + 15;
  if (!pCreator->m_bCompress && !pHandler) {
    if ((len = pFile->AppendDWord(
             (FX_DWORD)(tempBuffer.GetLength() + m_Buffer.GetLength()))) < 0) {
      return -1;
    }
    offset += len;
    if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) {
      return -1;
    }
    if (pFile->AppendBlock(tempBuffer.GetBuffer(), tempBuffer.GetLength()) <
        0) {
      return -1;
    }
    if (pFile->AppendBlock(m_Buffer.GetBuffer(), m_Buffer.GetLength()) < 0) {
      return -1;
    }
    offset += len + tempBuffer.GetLength() + m_Buffer.GetLength();
  } else {
    tempBuffer << m_Buffer;
    CPDF_FlateEncoder encoder;
    encoder.Initialize(tempBuffer.GetBuffer(), tempBuffer.GetLength(),
                       pCreator->m_bCompress);
    CPDF_Encryptor encryptor;
    encryptor.Initialize(pHandler, m_dwObjNum, encoder.m_pData,
                         encoder.m_dwSize);
    if ((len = pFile->AppendDWord(encryptor.m_dwSize)) < 0) {
      return -1;
    }
    offset += len;
    if (pCreator->m_bCompress) {
      if (pFile->AppendString(FX_BSTRC("/Filter /FlateDecode")) < 0) {
        return -1;
      }
      offset += 20;
    }
    if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) {
      return -1;
    }
    if (pFile->AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
      return -1;
    }
    offset += len + encryptor.m_dwSize;
  }
  if ((len = pFile->AppendString(FX_BSTRC("\r\nendstream\r\nendobj\r\n"))) <
      0) {
    return -1;
  }
  offset += len;
  return ObjOffset;
}
CPDF_XRefStream::CPDF_XRefStream()
    : m_PrevOffset(0), m_dwTempObjNum(0), m_iSeg(0) {}
FX_BOOL CPDF_XRefStream::Start() {
  m_IndexArray.RemoveAll();
  m_Buffer.Clear();
  m_iSeg = 0;
  return TRUE;
}
int32_t CPDF_XRefStream::CompressIndirectObject(FX_DWORD dwObjNum,
                                                const CPDF_Object* pObj,
                                                CPDF_Creator* pCreator) {
  if (!pCreator) {
    return 0;
  }
  m_ObjStream.CompressIndirectObject(dwObjNum, pObj);
  if (m_ObjStream.m_ObjNumArray.GetSize() < pCreator->m_ObjectStreamSize &&
      m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) {
    return 1;
  }
  return EndObjectStream(pCreator);
}
int32_t CPDF_XRefStream::CompressIndirectObject(FX_DWORD dwObjNum,
                                                const uint8_t* pBuffer,
                                                FX_DWORD dwSize,
                                                CPDF_Creator* pCreator) {
  if (!pCreator) {
    return 0;
  }
  m_ObjStream.CompressIndirectObject(dwObjNum, pBuffer, dwSize);
  if (m_ObjStream.m_ObjNumArray.GetSize() < pCreator->m_ObjectStreamSize &&
      m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) {
    return 1;
  }
  return EndObjectStream(pCreator);
}
static void _AppendIndex0(CFX_ByteTextBuf& buffer,
                          FX_BOOL bFirstObject = TRUE) {
  buffer.AppendByte(0);
  buffer.AppendByte(0);
  buffer.AppendByte(0);
  buffer.AppendByte(0);
  buffer.AppendByte(0);
  if (bFirstObject) {
    buffer.AppendByte(0xFF);
    buffer.AppendByte(0xFF);
  } else {
    buffer.AppendByte(0);
    buffer.AppendByte(0);
  }
}
static void _AppendIndex1(CFX_ByteTextBuf& buffer, FX_FILESIZE offset) {
  buffer.AppendByte(1);
  buffer.AppendByte(FX_GETBYTEOFFSET24(offset));
  buffer.AppendByte(FX_GETBYTEOFFSET16(offset));
  buffer.AppendByte(FX_GETBYTEOFFSET8(offset));
  buffer.AppendByte(FX_GETBYTEOFFSET0(offset));
  buffer.AppendByte(0);
  buffer.AppendByte(0);
}
static void _AppendIndex2(CFX_ByteTextBuf& buffer,
                          FX_DWORD objnum,
                          int32_t index) {
  buffer.AppendByte(2);
  buffer.AppendByte(FX_GETBYTEOFFSET24(objnum));
  buffer.AppendByte(FX_GETBYTEOFFSET16(objnum));
  buffer.AppendByte(FX_GETBYTEOFFSET8(objnum));
  buffer.AppendByte(FX_GETBYTEOFFSET0(objnum));
  buffer.AppendByte(FX_GETBYTEOFFSET8(index));
  buffer.AppendByte(FX_GETBYTEOFFSET0(index));
}
int32_t CPDF_XRefStream::EndObjectStream(CPDF_Creator* pCreator, FX_BOOL bEOF) {
  FX_FILESIZE objOffset = 0;
  if (bEOF) {
    objOffset = m_ObjStream.End(pCreator);
    if (objOffset < 0) {
      return -1;
    }
  }
  FX_DWORD& dwObjStmNum = m_ObjStream.m_dwObjNum;
  if (!dwObjStmNum) {
    dwObjStmNum = ++pCreator->m_dwLastObjNum;
  }
  int32_t iSize = m_ObjStream.m_ObjNumArray.GetSize();
  int32_t iSeg = m_IndexArray.GetSize() / 2;
  if (!(pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL)) {
    if (m_dwTempObjNum == 0) {
      _AppendIndex0(m_Buffer);
      m_dwTempObjNum++;
    }
    FX_DWORD end_num = m_IndexArray.GetAt((iSeg - 1) * 2) +
                       m_IndexArray.GetAt((iSeg - 1) * 2 + 1);
    int index = 0;
    for (; m_dwTempObjNum < end_num; m_dwTempObjNum++) {
      FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(m_dwTempObjNum);
      if (offset) {
        if (index >= iSize ||
            m_dwTempObjNum != m_ObjStream.m_ObjNumArray[index]) {
          _AppendIndex1(m_Buffer, *offset);
        } else {
          _AppendIndex2(m_Buffer, dwObjStmNum, index++);
        }
      } else {
        _AppendIndex0(m_Buffer, FALSE);
      }
    }
    if (iSize > 0 && bEOF) {
      pCreator->m_ObjectOffset.Add(dwObjStmNum, 1);
      pCreator->m_ObjectSize.Add(dwObjStmNum, 1);
      pCreator->m_ObjectOffset[dwObjStmNum] = objOffset;
    }
    m_iSeg = iSeg;
    if (bEOF) {
      m_ObjStream.Start();
    }
    return 1;
  }
  int32_t& j = m_ObjStream.m_index;
  for (int i = m_iSeg; i < iSeg; i++) {
    FX_DWORD start = m_IndexArray.ElementAt(i * 2);
    FX_DWORD end = m_IndexArray.ElementAt(i * 2 + 1) + start;
    for (FX_DWORD m = start; m < end; m++) {
      if (j >= iSize || m != m_ObjStream.m_ObjNumArray.ElementAt(j)) {
        _AppendIndex1(m_Buffer, pCreator->m_ObjectOffset[m]);
      } else {
        _AppendIndex2(m_Buffer, dwObjStmNum, j++);
      }
    }
  }
  if (iSize > 0 && bEOF) {
    _AppendIndex1(m_Buffer, objOffset);
    m_IndexArray.Add(dwObjStmNum);
    m_IndexArray.Add(1);
    iSeg += 1;
  }
  m_iSeg = iSeg;
  if (bEOF) {
    m_ObjStream.Start();
  }
  return 1;
}
FX_BOOL CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator,
                                            FX_BOOL bEOF) {
  FX_FILESIZE offset_tmp = pCreator->m_Offset;
  FX_DWORD objnum = ++pCreator->m_dwLastObjNum;
  CFX_FileBufferArchive* pFile = &pCreator->m_File;
  FX_BOOL bIncremental = (pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL) != 0;
  if (bIncremental) {
    AddObjectNumberToIndexArray(objnum);
  } else {
    for (; m_dwTempObjNum < pCreator->m_dwLastObjNum; m_dwTempObjNum++) {
      FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(m_dwTempObjNum);
      if (offset) {
        _AppendIndex1(m_Buffer, *offset);
      } else {
        _AppendIndex0(m_Buffer, FALSE);
      }
    }
  }
  _AppendIndex1(m_Buffer, offset_tmp);
  FX_FILESIZE& offset = pCreator->m_Offset;
  int32_t len = pFile->AppendDWord(objnum);
  if (len < 0) {
    return FALSE;
  }
  offset += len;
  if ((len = pFile->AppendString(
           FX_BSTRC(" 0 obj\r\n<</Type /XRef/W[1 4 2]/Index["))) < 0) {
    return FALSE;
  }
  offset += len;
  if (!bIncremental) {
    if ((len = pFile->AppendDWord(0)) < 0) {
      return FALSE;
    }
    if ((len = pFile->AppendString(FX_BSTRC(" "))) < 0) {
      return FALSE;
    }
    offset += len + 1;
    if ((len = pFile->AppendDWord(objnum + 1)) < 0) {
      return FALSE;
    }
    offset += len;
  } else {
    int32_t iSeg = m_IndexArray.GetSize() / 2;
    for (int32_t i = 0; i < iSeg; i++) {
      if ((len = pFile->AppendDWord(m_IndexArray.ElementAt(i * 2))) < 0) {
        return FALSE;
      }
      if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
        return FALSE;
      }
      offset += len + 1;
      if ((len = pFile->AppendDWord(m_IndexArray.ElementAt(i * 2 + 1))) < 0) {
        return FALSE;
      }
      if (pFile->AppendString(FX_BSTRC(" ")) < 0) {
        return FALSE;
      }
      offset += len + 1;
    }
  }
  if (pFile->AppendString(FX_BSTRC("]/Size ")) < 0) {
    return FALSE;
  }
  if ((len = pFile->AppendDWord(objnum + 1)) < 0) {
    return FALSE;
  }
  offset += len + 7;
  if (m_PrevOffset > 0) {
    if (pFile->AppendString(FX_BSTRC("/Prev ")) < 0) {
      return FALSE;
    }
    FX_CHAR offset_buf[20];
    FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
    FXSYS_i64toa(m_PrevOffset, offset_buf, 10);
    int32_t len = (int32_t)FXSYS_strlen(offset_buf);
    if (pFile->AppendBlock(offset_buf, len) < 0) {
      return FALSE;
    }
    offset += len + 6;
  }
  FX_BOOL bPredictor = TRUE;
  CPDF_FlateEncoder encoder;
  encoder.Initialize(m_Buffer.GetBuffer(), m_Buffer.GetLength(),
                     pCreator->m_bCompress, bPredictor);
  if (pCreator->m_bCompress) {
    if (pFile->AppendString(FX_BSTRC("/Filter /FlateDecode")) < 0) {
      return FALSE;
    }
    offset += 20;
    if (bPredictor) {
      if ((len = pFile->AppendString(
               FX_BSTRC("/DecodeParms<</Columns 7/Predictor 12>>"))) < 0) {
        return FALSE;
      }
      offset += len;
    }
  }
  if (pFile->AppendString(FX_BSTRC("/Length ")) < 0) {
    return FALSE;
  }
  if ((len = pFile->AppendDWord(encoder.m_dwSize)) < 0) {
    return FALSE;
  }
  offset += len + 8;
  if (bEOF) {
    if ((len = PDF_CreatorWriteTrailer(pCreator->m_pDocument, pFile,
                                       pCreator->m_pIDArray,
                                       pCreator->m_bCompress)) < 0) {
      return FALSE;
    }
    offset += len;
    if (pCreator->m_pEncryptDict) {
      FX_DWORD dwEncryptObjNum = pCreator->m_pEncryptDict->GetObjNum();
      if (dwEncryptObjNum == 0) {
        dwEncryptObjNum = pCreator->m_dwEnryptObjNum;
      }
      if ((len = PDF_CreatorWriteEncrypt(pCreator->m_pEncryptDict,
                                         dwEncryptObjNum, pFile)) < 0) {
        return FALSE;
      }
      offset += len;
    }
  }
  if ((len = pFile->AppendString(FX_BSTRC(">>stream\r\n"))) < 0) {
    return FALSE;
  }
  offset += len;
  if (pFile->AppendBlock(encoder.m_pData, encoder.m_dwSize) < 0) {
    return FALSE;
  }
  if ((len = pFile->AppendString(FX_BSTRC("\r\nendstream\r\nendobj\r\n"))) <
      0) {
    return FALSE;
  }
  offset += encoder.m_dwSize + len;
  m_PrevOffset = offset_tmp;
  return TRUE;
}
FX_BOOL CPDF_XRefStream::End(CPDF_Creator* pCreator, FX_BOOL bEOF) {
  if (EndObjectStream(pCreator, bEOF) < 0) {
    return FALSE;
  }
  return GenerateXRefStream(pCreator, bEOF);
}
FX_BOOL CPDF_XRefStream::EndXRefStream(CPDF_Creator* pCreator) {
  if (!(pCreator->m_dwFlags & FPDFCREATE_INCREMENTAL)) {
    _AppendIndex0(m_Buffer);
    for (FX_DWORD i = 1; i < pCreator->m_dwLastObjNum + 1; i++) {
      FX_FILESIZE* offset = pCreator->m_ObjectOffset.GetPtrAt(i);
      if (offset) {
        _AppendIndex1(m_Buffer, *offset);
      } else {
        _AppendIndex0(m_Buffer, FALSE);
      }
    }
  } else {
    int32_t iSeg = m_IndexArray.GetSize() / 2;
    for (int i = 0; i < iSeg; i++) {
      FX_DWORD start = m_IndexArray.ElementAt(i * 2);
      FX_DWORD end = m_IndexArray.ElementAt(i * 2 + 1) + start;
      for (FX_DWORD j = start; j < end; j++) {
        _AppendIndex1(m_Buffer, pCreator->m_ObjectOffset[j]);
      }
    }
  }
  return GenerateXRefStream(pCreator, FALSE);
}
FX_BOOL CPDF_XRefStream::AddObjectNumberToIndexArray(FX_DWORD objnum) {
  int32_t iSize = m_IndexArray.GetSize();
  if (iSize == 0) {
    m_IndexArray.Add(objnum);
    m_IndexArray.Add(1);
  } else {
    FXSYS_assert(iSize > 1);
    FX_DWORD startobjnum = m_IndexArray.ElementAt(iSize - 2);
    int32_t iCount = m_IndexArray.ElementAt(iSize - 1);
    if (objnum == startobjnum + iCount) {
      m_IndexArray[iSize - 1] = iCount + 1;
    } else {
      m_IndexArray.Add(objnum);
      m_IndexArray.Add(1);
    }
  }
  return TRUE;
}
CPDF_Creator::CPDF_Creator(CPDF_Document* pDoc) {
  m_pDocument = pDoc;
  m_pParser = (CPDF_Parser*)pDoc->m_pParser;
  m_bCompress = TRUE;
  if (m_pParser) {
    m_pEncryptDict = m_pParser->GetEncryptDict();
    m_pCryptoHandler = m_pParser->GetCryptoHandler();
  } else {
    m_pEncryptDict = NULL;
    m_pCryptoHandler = NULL;
  }
  m_bSecurityChanged = FALSE;
  m_bStandardSecurity = FALSE;
  m_pMetadata = NULL;
  m_bEncryptCloned = FALSE;
  m_bEncryptMetadata = FALSE;
  m_Offset = 0;
  m_iStage = -1;
  m_dwFlags = 0;
  m_Pos = NULL;
  m_XrefStart = 0;
  m_pXRefStream = NULL;
  m_ObjectStreamSize = 200;
  m_dwLastObjNum = m_pDocument->GetLastObjNum();
  m_pIDArray = NULL;
  m_FileVersion = 0;
  m_dwEnryptObjNum = 0;
  m_bNewCrypto = FALSE;
}
CPDF_Creator::~CPDF_Creator() {
  ResetStandardSecurity();
  if (m_bEncryptCloned && m_pEncryptDict) {
    m_pEncryptDict->Release();
    m_pEncryptDict = NULL;
  }
  Clear();
}
static FX_BOOL _IsXRefNeedEnd(CPDF_XRefStream* pXRef, FX_DWORD flag) {
  if (!(flag & FPDFCREATE_INCREMENTAL)) {
    return FALSE;
  }
  int32_t iSize = pXRef->m_IndexArray.GetSize() / 2;
  int32_t iCount = 0;
  for (int32_t i = 0; i < iSize; i++) {
    iCount += pXRef->m_IndexArray.ElementAt(i * 2 + 1);
  }
  return (iCount >= PDF_XREFSTREAM_MAXSIZE);
}
int32_t CPDF_Creator::WriteIndirectObjectToStream(const CPDF_Object* pObj) {
  if (!m_pXRefStream)
    return 1;

  FX_DWORD objnum = pObj->GetObjNum();
  if (m_pParser && m_pParser->m_ObjVersion.GetSize() > (int32_t)objnum &&
      m_pParser->m_ObjVersion[objnum] > 0) {
    return 1;
  }

  if (pObj->IsNumber())
    return 1;

  CPDF_Dictionary* pDict = pObj->GetDict();
  if (pObj->IsStream())
    if (pDict && pDict->GetString(FX_BSTRC("Type")) == FX_BSTRC("XRef"))
      return 0;
    return 1;

  if (pDict) {
    if (pDict == m_pDocument->m_pRootDict || pDict == m_pEncryptDict)
      return 1;
    if (IsSignatureDict(pDict))
      return 1;
    if (pDict->GetString(FX_BSTRC("Type")) == FX_BSTRC("Page"))
      return 1;
  }

  m_pXRefStream->AddObjectNumberToIndexArray(objnum);
  if (m_pXRefStream->CompressIndirectObject(objnum, pObj, this) < 0)
    return -1;
  if (!_IsXRefNeedEnd(m_pXRefStream, m_dwFlags))
    return 0;
  if (!m_pXRefStream->End(this))
    return -1;
  if (!m_pXRefStream->Start())
    return -1;
  return 0;
}
int32_t CPDF_Creator::WriteIndirectObjectToStream(FX_DWORD objnum,
                                                  const uint8_t* pBuffer,
                                                  FX_DWORD dwSize) {
  if (!m_pXRefStream) {
    return 1;
  }
  m_pXRefStream->AddObjectNumberToIndexArray(objnum);
  int32_t iRet =
      m_pXRefStream->CompressIndirectObject(objnum, pBuffer, dwSize, this);
  if (iRet < 1) {
    return iRet;
  }
  if (!_IsXRefNeedEnd(m_pXRefStream, m_dwFlags)) {
    return 0;
  }
  if (!m_pXRefStream->End(this)) {
    return -1;
  }
  if (!m_pXRefStream->Start()) {
    return -1;
  }
  return 0;
}
int32_t CPDF_Creator::AppendObjectNumberToXRef(FX_DWORD objnum) {
  if (!m_pXRefStream) {
    return 1;
  }
  m_pXRefStream->AddObjectNumberToIndexArray(objnum);
  if (!_IsXRefNeedEnd(m_pXRefStream, m_dwFlags)) {
    return 0;
  }
  if (!m_pXRefStream->End(this)) {
    return -1;
  }
  if (!m_pXRefStream->Start()) {
    return -1;
  }
  return 0;
}
int32_t CPDF_Creator::WriteStream(const CPDF_Object* pStream,
                                  FX_DWORD objnum,
                                  CPDF_CryptoHandler* pCrypto) {
  CPDF_FlateEncoder encoder;
  encoder.Initialize(const_cast<CPDF_Stream*>(pStream->AsStream()),
                     pStream == m_pMetadata ? FALSE : m_bCompress);
  CPDF_Encryptor encryptor;
  if (!encryptor.Initialize(pCrypto, objnum, encoder.m_pData,
                            encoder.m_dwSize)) {
    return -1;
  }
  if ((FX_DWORD)encoder.m_pDict->GetInteger(FX_BSTRC("Length")) !=
      encryptor.m_dwSize) {
    encoder.CloneDict();
    encoder.m_pDict->SetAtInteger(FX_BSTRC("Length"), encryptor.m_dwSize);
  }
  if (WriteDirectObj(objnum, encoder.m_pDict) < 0) {
    return -1;
  }
  int len = m_File.AppendString(FX_BSTRC("stream\r\n"));
  if (len < 0) {
    return -1;
  }
  m_Offset += len;
  if (m_File.AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
    return -1;
  }
  m_Offset += encryptor.m_dwSize;
  if ((len = m_File.AppendString(FX_BSTRC("\r\nendstream"))) < 0) {
    return -1;
  }
  m_Offset += len;
  return 1;
}
int32_t CPDF_Creator::WriteIndirectObj(FX_DWORD objnum,
                                       const CPDF_Object* pObj) {
  int32_t len = m_File.AppendDWord(objnum);
  if (len < 0)
    return -1;

  m_Offset += len;
  if ((len = m_File.AppendString(FX_BSTRC(" 0 obj\r\n"))) < 0)
    return -1;

  m_Offset += len;
  if (pObj->IsStream()) {
    CPDF_CryptoHandler* pHandler = nullptr;
    pHandler =
        (pObj == m_pMetadata && !m_bEncryptMetadata) ? NULL : m_pCryptoHandler;
    if (WriteStream(pObj, objnum, pHandler) < 0)
      return -1;
  } else {
    if (WriteDirectObj(objnum, pObj) < 0)
      return -1;
  }
  if ((len = m_File.AppendString(FX_BSTRC("\r\nendobj\r\n"))) < 0)
    return -1;

  m_Offset += len;
  if (AppendObjectNumberToXRef(objnum) < 0)
    return -1;
  return 0;
}
int32_t CPDF_Creator::WriteIndirectObj(const CPDF_Object* pObj) {
  int32_t iRet = WriteIndirectObjectToStream(pObj);
  if (iRet < 1) {
    return iRet;
  }
  return WriteIndirectObj(pObj->GetObjNum(), pObj);
}
int32_t CPDF_Creator::WriteDirectObj(FX_DWORD objnum,
                                     const CPDF_Object* pObj,
                                     FX_BOOL bEncrypt) {
  int32_t len = 0;
  if (pObj == NULL) {
    if (m_File.AppendString(FX_BSTRC(" null")) < 0) {
      return -1;
    }
    m_Offset += 5;
    return 1;
  }
  switch (pObj->GetType()) {
    case PDFOBJ_NULL:
      if (m_File.AppendString(FX_BSTRC(" null")) < 0) {
        return -1;
      }
      m_Offset += 5;
      break;
    case PDFOBJ_BOOLEAN:
    case PDFOBJ_NUMBER:
      if (m_File.AppendString(FX_BSTRC(" ")) < 0) {
        return -1;
      }
      if ((len = m_File.AppendString(pObj->GetString())) < 0) {
        return -1;
      }
      m_Offset += len + 1;
      break;
    case PDFOBJ_STRING: {
      CFX_ByteString str = pObj->GetString();
      FX_BOOL bHex = pObj->AsString()->IsHex();
      if (m_pCryptoHandler == NULL || !bEncrypt) {
        CFX_ByteString content = PDF_EncodeString(str, bHex);
        if ((len = m_File.AppendString(content)) < 0) {
          return -1;
        }
        m_Offset += len;
        break;
      }
      CPDF_Encryptor encryptor;
      encryptor.Initialize(m_pCryptoHandler, objnum, (uint8_t*)str.c_str(),
                           str.GetLength());
      CFX_ByteString content = PDF_EncodeString(
          CFX_ByteString((const FX_CHAR*)encryptor.m_pData, encryptor.m_dwSize),
          bHex);
      if ((len = m_File.AppendString(content)) < 0) {
        return -1;
      }
      m_Offset += len;
      break;
    }
    case PDFOBJ_STREAM: {
      CPDF_FlateEncoder encoder;
      encoder.Initialize(const_cast<CPDF_Stream*>(pObj->AsStream()),
                         m_bCompress);
      CPDF_Encryptor encryptor;
      CPDF_CryptoHandler* pHandler = m_pCryptoHandler;
      encryptor.Initialize(pHandler, objnum, encoder.m_pData, encoder.m_dwSize);
      if ((FX_DWORD)encoder.m_pDict->GetInteger(FX_BSTRC("Length")) !=
          encryptor.m_dwSize) {
        encoder.CloneDict();
        encoder.m_pDict->SetAtInteger(FX_BSTRC("Length"), encryptor.m_dwSize);
      }
      if (WriteDirectObj(objnum, encoder.m_pDict) < 0) {
        return -1;
      }
      if ((len = m_File.AppendString(FX_BSTRC("stream\r\n"))) < 0) {
        return -1;
      }
      m_Offset += len;
      if (m_File.AppendBlock(encryptor.m_pData, encryptor.m_dwSize) < 0) {
        return -1;
      }
      m_Offset += encryptor.m_dwSize;
      if ((len = m_File.AppendString(FX_BSTRC("\r\nendstream"))) < 0) {
        return -1;
      }
      m_Offset += len;
      break;
    }
    case PDFOBJ_NAME: {
      if (m_File.AppendString(FX_BSTRC("/")) < 0) {
        return -1;
      }
      CFX_ByteString str = pObj->GetString();
      if ((len = m_File.AppendString(PDF_NameEncode(str))) < 0) {
        return -1;
      }
      m_Offset += len + 1;
      break;
    }
    case PDFOBJ_REFERENCE: {
      if (m_File.AppendString(FX_BSTRC(" ")) < 0)
        return -1;
      if ((len = m_File.AppendDWord(pObj->AsReference()->GetRefObjNum())) < 0)
        return -1;
      if (m_File.AppendString(FX_BSTRC(" 0 R")) < 0)
        return -1;
      m_Offset += len + 5;
      break;
    }
    case PDFOBJ_ARRAY: {
      if (m_File.AppendString(FX_BSTRC("[")) < 0) {
        return -1;
      }
      m_Offset += 1;
      const CPDF_Array* p = pObj->AsArray();
      for (FX_DWORD i = 0; i < p->GetCount(); i++) {
        CPDF_Object* pElement = p->GetElement(i);
        if (pElement->GetObjNum()) {
          if (m_File.AppendString(FX_BSTRC(" ")) < 0) {
            return -1;
          }
          if ((len = m_File.AppendDWord(pElement->GetObjNum())) < 0) {
            return -1;
          }
          if (m_File.AppendString(FX_BSTRC(" 0 R")) < 0) {
            return -1;
          }
          m_Offset += len + 5;
        } else {
          if (WriteDirectObj(objnum, pElement) < 0) {
            return -1;
          }
        }
      }
      if (m_File.AppendString(FX_BSTRC("]")) < 0) {
        return -1;
      }
      m_Offset += 1;
      break;
    }
    case PDFOBJ_DICTIONARY: {
      if (m_pCryptoHandler == NULL || pObj == m_pEncryptDict) {
        return PDF_CreatorAppendObject(pObj, &m_File, m_Offset);
      }
      if (m_File.AppendString(FX_BSTRC("<<")) < 0) {
        return -1;
      }
      m_Offset += 2;
      const CPDF_Dictionary* p = pObj->AsDictionary();
      FX_BOOL bSignDict = IsSignatureDict(p);
      FX_POSITION pos = p->GetStartPos();
      while (pos) {
        FX_BOOL bSignValue = FALSE;
        CFX_ByteString key;
        CPDF_Object* pValue = p->GetNextElement(pos, key);
        if (m_File.AppendString(FX_BSTRC("/")) < 0) {
          return -1;
        }
        if ((len = m_File.AppendString(PDF_NameEncode(key))) < 0) {
          return -1;
        }
        m_Offset += len + 1;
        if (bSignDict && key == FX_BSTRC("Contents")) {
          bSignValue = TRUE;
        }
        if (pValue->GetObjNum()) {
          if (m_File.AppendString(FX_BSTRC(" ")) < 0) {
            return -1;
          }
          if ((len = m_File.AppendDWord(pValue->GetObjNum())) < 0) {
            return -1;
          }
          if (m_File.AppendString(FX_BSTRC(" 0 R ")) < 0) {
            return -1;
          }
          m_Offset += len + 6;
        } else {
          if (WriteDirectObj(objnum, pValue, !bSignValue) < 0) {
            return -1;
          }
        }
      }
      if (m_File.AppendString(FX_BSTRC(">>")) < 0) {
        return -1;
      }
      m_Offset += 2;
      break;
    }
  }
  return 1;
}
int32_t CPDF_Creator::WriteOldIndirectObject(FX_DWORD objnum) {
  if (m_pParser->m_V5Type[objnum] == 0 || m_pParser->m_V5Type[objnum] == 255) {
    return 0;
  }
  m_ObjectOffset[objnum] = m_Offset;
  void* valuetemp = NULL;
  FX_BOOL bExistInMap =
      m_pDocument->m_IndirectObjs.Lookup((void*)(uintptr_t)objnum, valuetemp);
  FX_BOOL bObjStm =
      (m_pParser->m_V5Type[objnum] == 2) && m_pEncryptDict && !m_pXRefStream;
  if (m_pParser->m_bVersionUpdated || m_bSecurityChanged || bExistInMap ||
      bObjStm) {
    CPDF_Object* pObj = m_pDocument->GetIndirectObject(objnum);
    if (pObj == NULL) {
      m_ObjectOffset[objnum] = 0;
      m_ObjectSize[objnum] = 0;
      return 0;
    }
    if (WriteIndirectObj(pObj)) {
      return -1;
    }
    if (!bExistInMap) {
      m_pDocument->ReleaseIndirectObject(objnum);
    }
  } else {
    uint8_t* pBuffer;
    FX_DWORD size;
    m_pParser->GetIndirectBinary(objnum, pBuffer, size);
    if (pBuffer == NULL) {
      return 0;
    }
    if (m_pParser->m_V5Type[objnum] == 2) {
      if (m_pXRefStream) {
        if (WriteIndirectObjectToStream(objnum, pBuffer, size) < 0) {
          FX_Free(pBuffer);
          return -1;
        }
      } else {
        int32_t len = m_File.AppendDWord(objnum);
        if (len < 0) {
          return -1;
        }
        if (m_File.AppendString(FX_BSTRC(" 0 obj ")) < 0) {
          return -1;
        }
        m_Offset += len + 7;
        if (m_File.AppendBlock(pBuffer, size) < 0) {
          return -1;
        }
        m_Offset += size;
        if (m_File.AppendString(FX_BSTRC("\r\nendobj\r\n")) < 0) {
          return -1;
        }
        m_Offset += 10;
      }
    } else {
      if (m_File.AppendBlock(pBuffer, size) < 0) {
        return -1;
      }
      m_Offset += size;
      if (AppendObjectNumberToXRef(objnum) < 0) {
        return -1;
      }
    }
    FX_Free(pBuffer);
  }
  return 1;
}
int32_t CPDF_Creator::WriteOldObjs(IFX_Pause* pPause) {
  FX_DWORD nOldSize = m_pParser->m_CrossRef.GetSize();
  FX_DWORD objnum = (FX_DWORD)(uintptr_t)m_Pos;
  for (; objnum < nOldSize; objnum++) {
    int32_t iRet = WriteOldIndirectObject(objnum);
    if (!iRet) {
      continue;
    }
    if (iRet < 0) {
      return iRet;
    }
    m_ObjectSize[objnum] = (FX_DWORD)(m_Offset - m_ObjectOffset[objnum]);
    if (pPause && pPause->NeedToPauseNow()) {
      m_Pos = (void*)(uintptr_t)(objnum + 1);
      return 1;
    }
  }
  return 0;
}
int32_t CPDF_Creator::WriteNewObjs(FX_BOOL bIncremental, IFX_Pause* pPause) {
  int32_t iCount = m_NewObjNumArray.GetSize();
  int32_t index = (int32_t)(uintptr_t)m_Pos;
  while (index < iCount) {
    FX_DWORD objnum = m_NewObjNumArray.ElementAt(index);
    CPDF_Object* pObj = NULL;
    m_pDocument->m_IndirectObjs.Lookup((void*)(uintptr_t)objnum, (void*&)pObj);
    if (NULL == pObj) {
      ++index;
      continue;
    }
    m_ObjectOffset[objnum] = m_Offset;
    if (WriteIndirectObj(pObj)) {
      return -1;
    }
    m_ObjectSize[objnum] = (FX_DWORD)(m_Offset - m_ObjectOffset[objnum]);
    index++;
    if (pPause && pPause->NeedToPauseNow()) {
      m_Pos = (FX_POSITION)(uintptr_t)index;
      return 1;
    }
  }
  return 0;
}
void CPDF_Creator::InitOldObjNumOffsets() {
  if (!m_pParser) {
    return;
  }
  FX_DWORD j = 0;
  FX_DWORD dwStart = 0;
  FX_DWORD dwEnd = m_pParser->GetLastObjNum();
  while (dwStart <= dwEnd) {
    while (dwStart <= dwEnd && (m_pParser->m_V5Type[dwStart] == 0 ||
                                m_pParser->m_V5Type[dwStart] == 255)) {
      dwStart++;
    }
    if (dwStart > dwEnd) {
      break;
    }
    j = dwStart;
    while (j <= dwEnd && m_pParser->m_V5Type[j] != 0 &&
           m_pParser->m_V5Type[j] != 255) {
      j++;
    }
    m_ObjectOffset.Add(dwStart, j - dwStart);
    m_ObjectSize.Add(dwStart, j - dwStart);
    dwStart = j;
  }
}
void CPDF_Creator::InitNewObjNumOffsets() {
  FX_BOOL bIncremental = (m_dwFlags & FPDFCREATE_INCREMENTAL) != 0;
  FX_BOOL bNoOriginal = (m_dwFlags & FPDFCREATE_NO_ORIGINAL) != 0;
  FX_DWORD nOldSize = m_pParser ? m_pParser->m_CrossRef.GetSize() : 0;
  FX_POSITION pos = m_pDocument->m_IndirectObjs.GetStartPosition();
  while (pos) {
    size_t key = 0;
    CPDF_Object* pObj;
    m_pDocument->m_IndirectObjs.GetNextAssoc(pos, (void*&)key, (void*&)pObj);
    FX_DWORD objnum = (FX_DWORD)key;
    if (pObj->GetObjNum() == -1) {
      continue;
    }
    if (bIncremental) {
      if (!pObj->IsModified()) {
        continue;
      }
    } else {
      if (objnum < nOldSize && m_pParser->m_V5Type[objnum] != 0) {
        continue;
      }
    }
    AppendNewObjNum(objnum);
  }
  int32_t iCount = m_NewObjNumArray.GetSize();
  if (iCount == 0) {
    return;
  }
  int32_t i = 0;
  FX_DWORD dwStartObjNum = 0;
  FX_BOOL bCrossRefValid = m_pParser && m_pParser->GetLastXRefOffset() > 0;
  while (i < iCount) {
    dwStartObjNum = m_NewObjNumArray.ElementAt(i);
    if ((bIncremental && (bNoOriginal || bCrossRefValid)) ||
        !m_ObjectOffset.GetPtrAt(dwStartObjNum)) {
      break;
    }
    i++;
  }
  if (i >= iCount) {
    return;
  }
  FX_DWORD dwLastObjNum = dwStartObjNum;
  i++;
  FX_BOOL bNewStart = FALSE;
  for (; i < iCount; i++) {
    FX_DWORD dwCurObjNum = m_NewObjNumArray.ElementAt(i);
    FX_BOOL bExist = (dwCurObjNum < nOldSize &&
                      m_ObjectOffset.GetPtrAt(dwCurObjNum) != NULL);
    if (bExist || dwCurObjNum - dwLastObjNum > 1) {
      if (!bNewStart) {
        m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
        m_ObjectSize.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
      }
      dwStartObjNum = dwCurObjNum;
    }
    if (bNewStart) {
      dwStartObjNum = dwCurObjNum;
    }
    bNewStart = bExist;
    dwLastObjNum = dwCurObjNum;
  }
  m_ObjectOffset.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
  m_ObjectSize.Add(dwStartObjNum, dwLastObjNum - dwStartObjNum + 1);
}
void CPDF_Creator::AppendNewObjNum(FX_DWORD objbum) {
  int32_t iStart = 0, iFind = 0;
  int32_t iEnd = m_NewObjNumArray.GetUpperBound();
  while (iStart <= iEnd) {
    int32_t iMid = (iStart + iEnd) / 2;
    FX_DWORD dwMid = m_NewObjNumArray.ElementAt(iMid);
    if (objbum < dwMid) {
      iEnd = iMid - 1;
    } else {
      if (iMid == iEnd) {
        iFind = iMid + 1;
        break;
      }
      FX_DWORD dwNext = m_NewObjNumArray.ElementAt(iMid + 1);
      if (objbum < dwNext) {
        iFind = iMid + 1;
        break;
      }
      iStart = iMid + 1;
    }
  }
  m_NewObjNumArray.InsertAt(iFind, objbum);
}
int32_t CPDF_Creator::WriteDoc_Stage1(IFX_Pause* pPause) {
  FXSYS_assert(m_iStage > -1 || m_iStage < 20);
  if (m_iStage == 0) {
    if (m_pParser == NULL) {
      m_dwFlags &= ~FPDFCREATE_INCREMENTAL;
    }
    if (m_bSecurityChanged && (m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0) {
      m_dwFlags &= ~FPDFCREATE_INCREMENTAL;
    }
    CPDF_Dictionary* pDict = m_pDocument->GetRoot();
    m_pMetadata = pDict ? pDict->GetElementValue(FX_BSTRC("Metadata")) : NULL;
    if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) {
      m_pXRefStream = new CPDF_XRefStream;
      m_pXRefStream->Start();
      if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser) {
        FX_FILESIZE prev = m_pParser->GetLastXRefOffset();
        m_pXRefStream->m_PrevOffset = prev;
      }
    }
    m_iStage = 10;
  }
  if (m_iStage == 10) {
    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0) {
      if (m_File.AppendString(FX_BSTRC("%PDF-1.")) < 0) {
        return -1;
      }
      m_Offset += 7;
      int32_t version = 7;
      if (m_FileVersion) {
        version = m_FileVersion;
      } else if (m_pParser) {
        version = m_pParser->GetFileVersion();
      }
      int32_t len = m_File.AppendDWord(version % 10);
      if (len < 0) {
        return -1;
      }
      m_Offset += len;
      if ((len = m_File.AppendString(FX_BSTRC("\r\n%\xA1\xB3\xC5\xD7\r\n"))) <
          0) {
        return -1;
      }
      m_Offset += len;
      InitOldObjNumOffsets();
      m_iStage = 20;
    } else {
      IFX_FileRead* pSrcFile = m_pParser->GetFileAccess();
      m_Offset = pSrcFile->GetSize();
      m_Pos = (void*)(uintptr_t)m_Offset;
      m_iStage = 15;
    }
  }
  if (m_iStage == 15) {
    if ((m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0 && m_Pos) {
      IFX_FileRead* pSrcFile = m_pParser->GetFileAccess();
      uint8_t buffer[4096];
      FX_DWORD src_size = (FX_DWORD)(uintptr_t)m_Pos;
      while (src_size) {
        FX_DWORD block_size = src_size > 4096 ? 4096 : src_size;
        if (!pSrcFile->ReadBlock(buffer, m_Offset - src_size, block_size)) {
          return -1;
        }
        if (m_File.AppendBlock(buffer, block_size) < 0) {
          return -1;
        }
        src_size -= block_size;
        if (pPause && pPause->NeedToPauseNow()) {
          m_Pos = (void*)(uintptr_t)src_size;
          return 1;
        }
      }
    }
    if ((m_dwFlags & FPDFCREATE_NO_ORIGINAL) == 0 &&
        m_pParser->GetLastXRefOffset() == 0) {
      InitOldObjNumOffsets();
      FX_DWORD dwEnd = m_pParser->GetLastObjNum();
      FX_BOOL bObjStm = (m_dwFlags & FPDFCREATE_OBJECTSTREAM) != 0;
      for (FX_DWORD objnum = 0; objnum <= dwEnd; objnum++) {
        if (m_pParser->m_V5Type[objnum] == 0 ||
            m_pParser->m_V5Type[objnum] == 255) {
          continue;
        }
        m_ObjectOffset[objnum] = m_pParser->m_CrossRef[objnum];
        if (bObjStm) {
          m_pXRefStream->AddObjectNumberToIndexArray(objnum);
        }
      }
      if (bObjStm) {
        m_pXRefStream->EndXRefStream(this);
        m_pXRefStream->Start();
      }
    }
    m_iStage = 20;
  }
  InitNewObjNumOffsets();
  return m_iStage;
}
int32_t CPDF_Creator::WriteDoc_Stage2(IFX_Pause* pPause) {
  FXSYS_assert(m_iStage >= 20 || m_iStage < 30);
  if (m_iStage == 20) {
    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 && m_pParser) {
      m_Pos = (void*)(uintptr_t)0;
      m_iStage = 21;
    } else {
      m_iStage = 25;
    }
  }
  if (m_iStage == 21) {
    int32_t iRet = WriteOldObjs(pPause);
    if (iRet) {
      return iRet;
    }
    m_iStage = 25;
  }
  if (m_iStage == 25) {
    m_Pos = (void*)(uintptr_t)0;
    m_iStage = 26;
  }
  if (m_iStage == 26) {
    int32_t iRet =
        WriteNewObjs((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0, pPause);
    if (iRet) {
      return iRet;
    }
    m_iStage = 27;
  }
  if (m_iStage == 27) {
    if (NULL != m_pEncryptDict && 0 == m_pEncryptDict->GetObjNum()) {
      m_dwLastObjNum += 1;
      FX_FILESIZE saveOffset = m_Offset;
      if (WriteIndirectObj(m_dwLastObjNum, m_pEncryptDict) < 0) {
        return -1;
      }
      m_ObjectOffset.Add(m_dwLastObjNum, 1);
      m_ObjectOffset[m_dwLastObjNum] = saveOffset;
      m_ObjectSize.Add(m_dwLastObjNum, 1);
      m_ObjectSize[m_dwLastObjNum] = m_Offset - saveOffset;
      m_dwEnryptObjNum = m_dwLastObjNum;
      if (m_dwFlags & FPDFCREATE_INCREMENTAL) {
        m_NewObjNumArray.Add(m_dwLastObjNum);
      }
    }
    m_iStage = 80;
  }
  return m_iStage;
}
int32_t CPDF_Creator::WriteDoc_Stage3(IFX_Pause* pPause) {
  FXSYS_assert(m_iStage >= 80 || m_iStage < 90);
  FX_DWORD dwLastObjNum = m_dwLastObjNum;
  if (m_iStage == 80) {
    m_XrefStart = m_Offset;
    if (m_dwFlags & FPDFCREATE_OBJECTSTREAM) {
      m_pXRefStream->End(this, TRUE);
      m_XrefStart = m_pXRefStream->m_PrevOffset;
      m_iStage = 90;
    } else if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 ||
               !m_pParser->IsXRefStream()) {
      if ((m_dwFlags & FPDFCREATE_INCREMENTAL) == 0 ||
          m_pParser->GetLastXRefOffset() == 0) {
        CFX_ByteString str;
        str = m_ObjectOffset.GetPtrAt(1)
                  ? FX_BSTRC("xref\r\n")
                  : FX_BSTRC("xref\r\n0 1\r\n0000000000 65536 f\r\n");
        if (m_File.AppendString(str) < 0) {
          return -1;
        }
        m_Pos = (void*)(uintptr_t)1;
        m_iStage = 81;
      } else {
        if (m_File.AppendString(FX_BSTRC("xref\r\n")) < 0) {
          return -1;
        }
        m_Pos = (void*)(uintptr_t)0;
        m_iStage = 82;
      }
    } else {
      m_iStage = 90;
    }
  }
  if (m_iStage == 81) {
    CFX_ByteString str;
    FX_DWORD i = (FX_DWORD)(uintptr_t)m_Pos, j;
    while (i <= dwLastObjNum) {
      while (i <= dwLastObjNum && !m_ObjectOffset.GetPtrAt(i)) {
        i++;
      }
      if (i > dwLastObjNum) {
        break;
      }
      j = i;
      while (j <= dwLastObjNum && m_ObjectOffset.GetPtrAt(j)) {
        j++;
      }
      if (i == 1) {
        str.Format("0 %d\r\n0000000000 65536 f\r\n", j);
      } else {
        str.Format("%d %d\r\n", i, j - i);
      }
      if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
        return -1;
      }
      while (i < j) {
        str.Format("%010d 00000 n\r\n", m_ObjectOffset[i++]);
        if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
          return -1;
        }
      }
      if (i > dwLastObjNum) {
        break;
      }
      if (pPause && pPause->NeedToPauseNow()) {
        m_Pos = (void*)(uintptr_t)i;
        return 1;
      }
    }
    m_iStage = 90;
  }
  if (m_iStage == 82) {
    CFX_ByteString str;
    int32_t iCount = m_NewObjNumArray.GetSize();
    int32_t i = (int32_t)(uintptr_t)m_Pos;
    while (i < iCount) {
      int32_t j = i;
      FX_DWORD objnum = m_NewObjNumArray.ElementAt(i);
      while (j < iCount) {
        if (++j == iCount) {
          break;
        }
        FX_DWORD dwCurrent = m_NewObjNumArray.ElementAt(j);
        if (dwCurrent - objnum > 1) {
          break;
        }
        objnum = dwCurrent;
      }
      objnum = m_NewObjNumArray.ElementAt(i);
      if (objnum == 1) {
        str.Format("0 %d\r\n0000000000 65536 f\r\n", j - i + 1);
      } else {
        str.Format("%d %d\r\n", objnum, j - i);
      }
      if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
        return -1;
      }
      while (i < j) {
        objnum = m_NewObjNumArray.ElementAt(i++);
        str.Format("%010d 00000 n\r\n", m_ObjectOffset[objnum]);
        if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0) {
          return -1;
        }
      }
      if (pPause && (i % 100) == 0 && pPause->NeedToPauseNow()) {
        m_Pos = (void*)(uintptr_t)i;
        return 1;
      }
    }
    m_iStage = 90;
  }
  return m_iStage;
}
static int32_t _OutPutIndex(CFX_FileBufferArchive* pFile, FX_FILESIZE offset) {
  FXSYS_assert(pFile);
  if (sizeof(offset) > 4) {
    if (FX_GETBYTEOFFSET32(offset)) {
      if (pFile->AppendByte(FX_GETBYTEOFFSET56(offset)) < 0) {
        return -1;
      }
      if (pFile->AppendByte(FX_GETBYTEOFFSET48(offset)) < 0) {
        return -1;
      }
      if (pFile->AppendByte(FX_GETBYTEOFFSET40(offset)) < 0) {
        return -1;
      }
      if (pFile->AppendByte(FX_GETBYTEOFFSET32(offset)) < 0) {
        return -1;
      }
    }
  }
  if (pFile->AppendByte(FX_GETBYTEOFFSET24(offset)) < 0) {
    return -1;
  }
  if (pFile->AppendByte(FX_GETBYTEOFFSET16(offset)) < 0) {
    return -1;
  }
  if (pFile->AppendByte(FX_GETBYTEOFFSET8(offset)) < 0) {
    return -1;
  }
  if (pFile->AppendByte(FX_GETBYTEOFFSET0(offset)) < 0) {
    return -1;
  }
  if (pFile->AppendByte(0) < 0) {
    return -1;
  }
  return 0;
}
int32_t CPDF_Creator::WriteDoc_Stage4(IFX_Pause* pPause) {
  FXSYS_assert(m_iStage >= 90);
  if ((m_dwFlags & FPDFCREATE_OBJECTSTREAM) == 0) {
    FX_BOOL bXRefStream =
        (m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser->IsXRefStream();
    if (!bXRefStream) {
      if (m_File.AppendString(FX_BSTRC("trailer\r\n<<")) < 0) {
        return -1;
      }
    } else {
      if (m_File.AppendDWord(m_pDocument->m_LastObjNum + 1) < 0) {
        return -1;
      }
      if (m_File.AppendString(FX_BSTRC(" 0 obj <<")) < 0) {
        return -1;
      }
    }
    if (m_pParser) {
      CPDF_Dictionary* p = m_pParser->m_pTrailer;
      FX_POSITION pos = p->GetStartPos();
      while (pos) {
        CFX_ByteString key;
        CPDF_Object* pValue = p->GetNextElement(pos, key);
        if (key == FX_BSTRC("Encrypt") || key == FX_BSTRC("Size") ||
            key == FX_BSTRC("Filter") || key == FX_BSTRC("Index") ||
            key == FX_BSTRC("Length") || key == FX_BSTRC("Prev") ||
            key == FX_BSTRC("W") || key == FX_BSTRC("XRefStm") ||
            key == FX_BSTRC("ID")) {
          continue;
        }
        if (m_File.AppendString((FX_BSTRC("/"))) < 0) {
          return -1;
        }
        if (m_File.AppendString(PDF_NameEncode(key)) < 0) {
          return -1;
        }
        if (pValue->GetObjNum()) {
          if (m_File.AppendString(FX_BSTRC(" ")) < 0) {
            return -1;
          }
          if (m_File.AppendDWord(pValue->GetObjNum()) < 0) {
            return -1;
          }
          if (m_File.AppendString(FX_BSTRC(" 0 R ")) < 0) {
            return -1;
          }
        } else {
          FX_FILESIZE offset = 0;
          if (PDF_CreatorAppendObject(pValue, &m_File, offset) < 0) {
            return -1;
          }
        }
      }
    } else {
      if (m_File.AppendString(FX_BSTRC("\r\n/Root ")) < 0) {
        return -1;
      }
      if (m_File.AppendDWord(m_pDocument->m_pRootDict->GetObjNum()) < 0) {
        return -1;
      }
      if (m_File.AppendString(FX_BSTRC(" 0 R\r\n")) < 0) {
        return -1;
      }
      if (m_pDocument->m_pInfoDict) {
        if (m_File.AppendString(FX_BSTRC("/Info ")) < 0) {
          return -1;
        }
        if (m_File.AppendDWord(m_pDocument->m_pInfoDict->GetObjNum()) < 0) {
          return -1;
        }
        if (m_File.AppendString(FX_BSTRC(" 0 R\r\n")) < 0) {
          return -1;
        }
      }
    }
    if (m_pEncryptDict) {
      if (m_File.AppendString(FX_BSTRC("/Encrypt")) < 0) {
        return -1;
      }
      FX_DWORD dwObjNum = m_pEncryptDict->GetObjNum();
      if (dwObjNum == 0) {
        dwObjNum = m_pDocument->GetLastObjNum() + 1;
      }
      if (m_File.AppendString(FX_BSTRC(" ")) < 0) {
        return -1;
      }
      if (m_File.AppendDWord(dwObjNum) < 0) {
        return -1;
      }
      if (m_File.AppendString(FX_BSTRC(" 0 R ")) < 0) {
        return -1;
      }
    }
    if (m_File.AppendString(FX_BSTRC("/Size ")) < 0) {
      return -1;
    }
    if (m_File.AppendDWord(m_dwLastObjNum + (bXRefStream ? 2 : 1)) < 0) {
      return -1;
    }
    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0) {
      FX_FILESIZE prev = m_pParser->GetLastXRefOffset();
      if (prev) {
        if (m_File.AppendString(FX_BSTRC("/Prev ")) < 0) {
          return -1;
        }
        FX_CHAR offset_buf[20];
        FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
        FXSYS_i64toa(prev, offset_buf, 10);
        if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0) {
          return -1;
        }
      }
    }
    if (m_pIDArray) {
      if (m_File.AppendString((FX_BSTRC("/ID"))) < 0) {
        return -1;
      }
      FX_FILESIZE offset = 0;
      if (PDF_CreatorAppendObject(m_pIDArray, &m_File, offset) < 0) {
        return -1;
      }
    }
    if (!bXRefStream) {
      if (m_File.AppendString(FX_BSTRC(">>")) < 0) {
        return -1;
      }
    } else {
      if (m_File.AppendString(FX_BSTRC("/W[0 4 1]/Index[")) < 0) {
        return -1;
      }
      if ((m_dwFlags & FPDFCREATE_INCREMENTAL) != 0 && m_pParser &&
          m_pParser->GetLastXRefOffset() == 0) {
        FX_DWORD i = 0;
        for (i = 0; i < m_dwLastObjNum; i++) {
          if (!m_ObjectOffset.GetPtrAt(i)) {
            continue;
          }
          if (m_File.AppendDWord(i) < 0) {
            return -1;
          }
          if (m_File.AppendString(FX_BSTRC(" 1 ")) < 0) {
            return -1;
          }
        }
        if (m_File.AppendString(FX_BSTRC("]/Length ")) < 0) {
          return -1;
        }
        if (m_File.AppendDWord(m_dwLastObjNum * 5) < 0) {
          return -1;
        }
        if (m_File.AppendString(FX_BSTRC(">>stream\r\n")) < 0) {
          return -1;
        }
        for (i = 0; i < m_dwLastObjNum; i++) {
          FX_FILESIZE* offset = m_ObjectOffset.GetPtrAt(i);
          if (!offset) {
            continue;
          }
          _OutPutIndex(&m_File, *offset);
        }
      } else {
        int count = m_NewObjNumArray.GetSize();
        int32_t i = 0;
        for (i = 0; i < count; i++) {
          FX_DWORD objnum = m_NewObjNumArray.ElementAt(i);
          if (m_File.AppendDWord(objnum) < 0) {
            return -1;
          }
          if (m_File.AppendString(FX_BSTRC(" 1 ")) < 0) {
            return -1;
          }
        }
        if (m_File.AppendString(FX_BSTRC("]/Length ")) < 0) {
          return -1;
        }
        if (m_File.AppendDWord(count * 5) < 0) {
          return -1;
        }
        if (m_File.AppendString(FX_BSTRC(">>stream\r\n")) < 0) {
          return -1;
        }
        for (i = 0; i < count; i++) {
          FX_DWORD objnum = m_NewObjNumArray.ElementAt(i);
          FX_FILESIZE offset = m_ObjectOffset[objnum];
          _OutPutIndex(&m_File, offset);
        }
      }
      if (m_File.AppendString(FX_BSTRC("\r\nendstream")) < 0) {
        return -1;
      }
    }
  }
  if (m_File.AppendString(FX_BSTRC("\r\nstartxref\r\n")) < 0) {
    return -1;
  }
  FX_CHAR offset_buf[20];
  FXSYS_memset(offset_buf, 0, sizeof(offset_buf));
  FXSYS_i64toa(m_XrefStart, offset_buf, 10);
  if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0) {
    return -1;
  }
  if (m_File.AppendString(FX_BSTRC("\r\n%%EOF\r\n")) < 0) {
    return -1;
  }
  m_File.Flush();
  return m_iStage = 100;
}
void CPDF_Creator::Clear() {
  delete m_pXRefStream;
  m_pXRefStream = NULL;
  m_File.Clear();
  m_NewObjNumArray.RemoveAll();
  if (m_pIDArray) {
    m_pIDArray->Release();
    m_pIDArray = NULL;
  }
}
FX_BOOL CPDF_Creator::Create(IFX_StreamWrite* pFile, FX_DWORD flags) {
  if (!pFile) {
    return FALSE;
  }
  if (!m_File.AttachFile(pFile, FALSE)) {
    return FALSE;
  }
  return Create(flags);
}
FX_BOOL CPDF_Creator::Create(FX_DWORD flags) {
  m_dwFlags = flags;
  m_iStage = 0;
  m_Offset = 0;
  m_dwLastObjNum = m_pDocument->GetLastObjNum();
  m_ObjectOffset.Clear();
  m_ObjectSize.Clear();
  m_NewObjNumArray.RemoveAll();
  InitID();
  if (flags & FPDFCREATE_PROGRESSIVE) {
    return TRUE;
  }
  return Continue(NULL) > -1;
}
void CPDF_Creator::InitID(FX_BOOL bDefault) {
  CPDF_Array* pOldIDArray = m_pParser ? m_pParser->GetIDArray() : NULL;
  FX_BOOL bNewId = !m_pIDArray;
  if (!m_pIDArray) {
    FX_DWORD* pBuffer = NULL;
    m_pIDArray = CPDF_Array::Create();
    CPDF_Object* pID1 = pOldIDArray ? pOldIDArray->GetElement(0) : NULL;
    if (pID1) {
      m_pIDArray->Add(pID1->Clone());
    } else {
      pBuffer = FX_Alloc(FX_DWORD, 4);
      PDF_GenerateFileID((FX_DWORD)(uintptr_t) this, m_dwLastObjNum, pBuffer);
      CFX_ByteStringC bsBuffer((const uint8_t*)pBuffer, 4 * sizeof(FX_DWORD));
      m_pIDArray->Add(CPDF_String::Create(bsBuffer, TRUE), m_pDocument);
    }
    FX_Free(pBuffer);
  }
  if (!bDefault) {
    return;
  }
  if (pOldIDArray) {
    CPDF_Object* pID2 = pOldIDArray->GetElement(1);
    if ((m_dwFlags & FPDFCREATE_INCREMENTAL) && m_pEncryptDict && pID2) {
      m_pIDArray->Add(pID2->Clone());
      return;
    }
    FX_DWORD* pBuffer = FX_Alloc(FX_DWORD, 4);
    PDF_GenerateFileID((FX_DWORD)(uintptr_t) this, m_dwLastObjNum, pBuffer);
    CFX_ByteStringC bsBuffer((const uint8_t*)pBuffer, 4 * sizeof(FX_DWORD));
    m_pIDArray->Add(CPDF_String::Create(bsBuffer, TRUE), m_pDocument);
    FX_Free(pBuffer);
    return;
  }
  m_pIDArray->Add(m_pIDArray->GetElement(0)->Clone());
  if (m_pEncryptDict && !pOldIDArray && m_pParser && bNewId) {
    if (m_pEncryptDict->GetString(FX_BSTRC("Filter")) == FX_BSTRC("Standard")) {
      CPDF_StandardSecurityHandler handler;
      CFX_ByteString user_pass = m_pParser->GetPassword();
      FX_DWORD flag = PDF_ENCRYPT_CONTENT;
      handler.OnCreate(m_pEncryptDict, m_pIDArray, (const uint8_t*)user_pass,
                       user_pass.GetLength(), flag);
      if (m_bNewCrypto) {
        delete m_pCryptoHandler;
      }
      m_pCryptoHandler = new CPDF_StandardCryptoHandler;
      m_pCryptoHandler->Init(m_pEncryptDict, &handler);
      m_bNewCrypto = TRUE;
      m_bSecurityChanged = TRUE;
    }
  }
}
int32_t CPDF_Creator::Continue(IFX_Pause* pPause) {
  if (m_iStage < 0) {
    return m_iStage;
  }
  int32_t iRet = 0;
  while (m_iStage < 100) {
    if (m_iStage < 20) {
      iRet = WriteDoc_Stage1(pPause);
    } else if (m_iStage < 30) {
      iRet = WriteDoc_Stage2(pPause);
    } else if (m_iStage < 90) {
      iRet = WriteDoc_Stage3(pPause);
    } else {
      iRet = WriteDoc_Stage4(pPause);
    }
    if (iRet < m_iStage) {
      break;
    }
  }
  if (iRet < 1 || m_iStage == 100) {
    m_iStage = -1;
    Clear();
    return iRet > 99 ? 0 : (iRet < 1 ? -1 : iRet);
  }
  return m_iStage;
}
FX_BOOL CPDF_Creator::SetFileVersion(int32_t fileVersion) {
  if (fileVersion < 10 || fileVersion > 17) {
    return FALSE;
  }
  m_FileVersion = fileVersion;
  return TRUE;
}
void CPDF_Creator::RemoveSecurity() {
  ResetStandardSecurity();
  m_bSecurityChanged = TRUE;
  m_pEncryptDict = NULL;
  m_pCryptoHandler = NULL;
}
void CPDF_Creator::ResetStandardSecurity() {
  if (m_bStandardSecurity || m_bNewCrypto) {
    delete m_pCryptoHandler;
    m_pCryptoHandler = NULL;
  }
  m_bNewCrypto = FALSE;
  if (!m_bStandardSecurity) {
    return;
  }
  if (m_pEncryptDict) {
    m_pEncryptDict->Release();
    m_pEncryptDict = NULL;
  }
  m_bStandardSecurity = FALSE;
}