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authorNicolas Pena <npm@chromium.org>2017-05-15 14:49:44 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-05-15 19:23:54 +0000
commit4b78b18a87210d2d7550aa6c097f54ebf2c95e02 (patch)
treef04efca1ee7e0f2d8fb5752b8911fdb9fd0cac11 /core/fpdfapi/edit/cpdf_xrefstream.cpp
parentc4722a7a3b3274fb066c2aac4eb3717e648b3004 (diff)
downloadpdfium-4b78b18a87210d2d7550aa6c097f54ebf2c95e02.tar.xz
Remove unused flags from CPDF_Creator
The only user of CPDF_Creator is FPDF_Doc_Save, and it only uses flags 1 or 2 when calling Create. Thus, the other two flags will never be set. Change-Id: Ib2eb0ce5585469c7749f0ab350855f1c6a2bba08 Reviewed-on: https://pdfium-review.googlesource.com/5491 Reviewed-by: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Nicolás Peña <npm@chromium.org>
Diffstat (limited to 'core/fpdfapi/edit/cpdf_xrefstream.cpp')
-rw-r--r--core/fpdfapi/edit/cpdf_xrefstream.cpp347
1 files changed, 0 insertions, 347 deletions
diff --git a/core/fpdfapi/edit/cpdf_xrefstream.cpp b/core/fpdfapi/edit/cpdf_xrefstream.cpp
deleted file mode 100644
index 67793b244d..0000000000
--- a/core/fpdfapi/edit/cpdf_xrefstream.cpp
+++ /dev/null
@@ -1,347 +0,0 @@
-// 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.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "core/fpdfapi/edit/cpdf_xrefstream.h"
-
-#include "core/fpdfapi/edit/cpdf_creator.h"
-#include "core/fpdfapi/edit/cpdf_flateencoder.h"
-#include "core/fpdfapi/parser/cpdf_array.h"
-#include "core/fpdfapi/parser/cpdf_document.h"
-#include "core/fpdfapi/parser/cpdf_parser.h"
-#include "core/fpdfapi/parser/fpdf_parser_decode.h"
-
-namespace {
-
-const int32_t kObjectStreamMaxSize = 200;
-
-bool WriteTrailer(CPDF_Document* pDocument,
- IFX_ArchiveStream* archive,
- CPDF_Array* pIDArray) {
- CPDF_Parser* pParser = pDocument->GetParser();
- if (pParser) {
- CPDF_Dictionary* p = pParser->GetTrailer();
- for (const auto& it : *p) {
- const CFX_ByteString& key = it.first;
- CPDF_Object* pValue = it.second.get();
- if (key == "Encrypt" || key == "Size" || key == "Filter" ||
- key == "Index" || key == "Length" || key == "Prev" || key == "W" ||
- key == "XRefStm" || key == "Type" || key == "ID") {
- continue;
- }
- if (key == "DecodeParms")
- continue;
- if (!archive->WriteString(("/")) ||
- !archive->WriteString(PDF_NameEncode(key).AsStringC())) {
- return false;
- }
-
- if (!pValue->IsInline()) {
- if (!archive->WriteString(" ") ||
- !archive->WriteDWord(pValue->GetObjNum()) ||
- !archive->WriteString(" 0 R ")) {
- return false;
- }
- } else if (!pValue->WriteTo(archive)) {
- return false;
- }
- }
- if (pIDArray) {
- if (!archive->WriteString(("/ID")) || !pIDArray->WriteTo(archive))
- return false;
- }
- return true;
- }
- if (!archive->WriteString("\r\n/Root ") ||
- !archive->WriteDWord(pDocument->GetRoot()->GetObjNum()) ||
- !archive->WriteString(" 0 R\r\n")) {
- return false;
- }
-
- if (pDocument->GetInfo()) {
- if (!archive->WriteString("/Info ") ||
- !archive->WriteDWord(pDocument->GetInfo()->GetObjNum()) ||
- !archive->WriteString(" 0 R\r\n")) {
- return false;
- }
- }
- if (pIDArray) {
- if (!archive->WriteString(("/ID")) || !pIDArray->WriteTo(archive))
- return false;
- }
- return true;
-}
-
-bool WriteEncryptDictObjectReference(uint32_t dwObjNum,
- IFX_ArchiveStream* archive) {
- ASSERT(archive);
-
- if (!archive->WriteString("/Encrypt") || !archive->WriteString(" ") ||
- !archive->WriteDWord(dwObjNum) || !archive->WriteString(" 0 R ")) {
- return false;
- }
- return true;
-}
-
-void AppendIndex0(CFX_ByteTextBuf& buffer, bool bFirstObject) {
- buffer.AppendByte(0);
- buffer.AppendByte(0);
- buffer.AppendByte(0);
- buffer.AppendByte(0);
- buffer.AppendByte(0);
-
- const uint8_t byte = bFirstObject ? 0xFF : 0;
- buffer.AppendByte(byte);
- buffer.AppendByte(byte);
-}
-
-void AppendIndex1(CFX_ByteTextBuf& buffer, FX_FILESIZE offset) {
- buffer.AppendByte(1);
- buffer.AppendByte(static_cast<uint8_t>(offset >> 24));
- buffer.AppendByte(static_cast<uint8_t>(offset >> 16));
- buffer.AppendByte(static_cast<uint8_t>(offset >> 8));
- buffer.AppendByte(static_cast<uint8_t>(offset));
- buffer.AppendByte(0);
- buffer.AppendByte(0);
-}
-
-void AppendIndex2(CFX_ByteTextBuf& buffer, uint32_t objnum, int32_t index) {
- buffer.AppendByte(2);
- buffer.AppendByte(static_cast<uint8_t>(objnum >> 24));
- buffer.AppendByte(static_cast<uint8_t>(objnum >> 16));
- buffer.AppendByte(static_cast<uint8_t>(objnum >> 8));
- buffer.AppendByte(static_cast<uint8_t>(objnum));
- buffer.AppendByte(static_cast<uint8_t>(index >> 8));
- buffer.AppendByte(static_cast<uint8_t>(index));
-}
-
-} // namespace
-
-CPDF_XRefStream::CPDF_XRefStream()
- : m_PrevOffset(0), m_dwTempObjNum(0), m_iSeg(0) {}
-
-CPDF_XRefStream::~CPDF_XRefStream() {}
-
-bool CPDF_XRefStream::Start() {
- m_IndexArray.clear();
- m_Buffer.Clear();
- m_iSeg = 0;
- return true;
-}
-
-bool CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
- const CPDF_Object* pObj,
- CPDF_Creator* pCreator) {
- ASSERT(pCreator);
-
- m_ObjStream.CompressIndirectObject(dwObjNum, pObj);
- if (m_ObjStream.ItemCount() < kObjectStreamMaxSize &&
- m_ObjStream.IsNotFull()) {
- return true;
- }
- return EndObjectStream(pCreator, true);
-}
-
-bool CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
- const uint8_t* pBuffer,
- uint32_t dwSize,
- CPDF_Creator* pCreator) {
- ASSERT(pCreator);
-
- m_ObjStream.CompressIndirectObject(dwObjNum, pBuffer, dwSize);
- if (m_ObjStream.ItemCount() < kObjectStreamMaxSize &&
- m_ObjStream.IsNotFull()) {
- return true;
- }
- return EndObjectStream(pCreator, true);
-}
-
-bool CPDF_XRefStream::EndObjectStream(CPDF_Creator* pCreator, bool bEOF) {
- FX_FILESIZE objOffset = 0;
- if (bEOF) {
- objOffset = m_ObjStream.End(pCreator);
- if (objOffset < 0)
- return false;
- }
-
- if (!m_ObjStream.GetObjectNumber())
- m_ObjStream.SetObjectNumber(pCreator->GetNextObjectNumber());
-
- int32_t iSize = m_ObjStream.ItemCount();
- size_t iSeg = m_IndexArray.size();
- if (!pCreator->IsIncremental()) {
- if (m_dwTempObjNum == 0) {
- AppendIndex0(m_Buffer, true);
- m_dwTempObjNum++;
- }
- uint32_t end_num = m_IndexArray.back().objnum + m_IndexArray.back().count;
- int index = 0;
- for (; m_dwTempObjNum < end_num; m_dwTempObjNum++) {
- if (pCreator->HasObjectNumber(m_dwTempObjNum)) {
- if (index >= iSize ||
- m_dwTempObjNum != m_ObjStream.GetObjectNumberForItem(index)) {
- AppendIndex1(m_Buffer, pCreator->GetObjectOffset(m_dwTempObjNum));
- } else {
- AppendIndex2(m_Buffer, m_ObjStream.GetObjectNumber(), index++);
- }
- } else {
- AppendIndex0(m_Buffer, false);
- }
- }
- if (iSize > 0 && bEOF)
- pCreator->SetObjectOffset(m_ObjStream.GetObjectNumber(), objOffset);
-
- m_iSeg = iSeg;
- if (bEOF)
- m_ObjStream.Start();
-
- return true;
- }
-
- for (auto it = m_IndexArray.begin() + m_iSeg; it != m_IndexArray.end();
- ++it) {
- for (uint32_t m = it->objnum; m < it->objnum + it->count; ++m) {
- if (m_ObjStream.GetIndex() >= iSize ||
- m != m_ObjStream.GetObjectNumberForItem(it - m_IndexArray.begin())) {
- AppendIndex1(m_Buffer, pCreator->GetObjectOffset(m));
- } else {
- AppendIndex2(m_Buffer, m_ObjStream.GetObjectNumber(),
- m_ObjStream.GetIndex());
- m_ObjStream.IncrementIndex();
- }
- }
- }
- if (iSize > 0 && bEOF) {
- AppendIndex1(m_Buffer, objOffset);
- m_IndexArray.push_back({m_ObjStream.GetObjectNumber(), 1});
- iSeg += 1;
- }
- m_iSeg = iSeg;
- if (bEOF)
- m_ObjStream.Start();
-
- return true;
-}
-
-bool CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator, bool bEOF) {
- uint32_t objnum = pCreator->GetNextObjectNumber();
- IFX_ArchiveStream* archive = pCreator->GetArchive();
- FX_FILESIZE offset_tmp = archive->CurrentOffset();
-
- if (pCreator->IsIncremental()) {
- AddObjectNumberToIndexArray(objnum);
- } else {
- for (; m_dwTempObjNum < pCreator->GetLastObjectNumber(); m_dwTempObjNum++) {
- if (pCreator->HasObjectNumber(m_dwTempObjNum))
- AppendIndex1(m_Buffer, pCreator->GetObjectOffset(m_dwTempObjNum));
- else
- AppendIndex0(m_Buffer, false);
- }
- }
-
- AppendIndex1(m_Buffer, offset_tmp);
-
- if (!archive->WriteDWord(objnum) ||
- !archive->WriteString(" 0 obj\r\n<</Type /XRef/W[1 4 2]/Index[")) {
- return false;
- }
-
- if (!pCreator->IsIncremental()) {
- if (!archive->WriteDWord(0) || !archive->WriteString(" ") ||
- !archive->WriteDWord(objnum + 1)) {
- return false;
- }
- } else {
- for (const auto& pair : m_IndexArray) {
- if (!archive->WriteDWord(pair.objnum) || !archive->WriteString(" ") ||
- !archive->WriteDWord(pair.count) || !archive->WriteString(" ")) {
- return false;
- }
- }
- }
- if (!archive->WriteString("]/Size ") || !archive->WriteDWord(objnum + 1))
- return false;
-
- if (m_PrevOffset > 0) {
- if (!archive->WriteString("/Prev "))
- return false;
-
- char offset_buf[20];
- memset(offset_buf, 0, sizeof(offset_buf));
- FXSYS_i64toa(m_PrevOffset, offset_buf, 10);
- int32_t offset_len = (int32_t)FXSYS_strlen(offset_buf);
- if (!archive->WriteBlock(offset_buf, offset_len))
- return false;
- }
-
- CPDF_FlateEncoder encoder(m_Buffer.GetBuffer(), m_Buffer.GetLength(), true,
- true);
- if (!archive->WriteString("/Filter /FlateDecode") ||
- !archive->WriteString("/DecodeParms<</Columns 7/Predictor 12>>") ||
- !archive->WriteString("/Length ") ||
- !archive->WriteDWord(encoder.GetSize())) {
- return false;
- }
-
- if (bEOF) {
- if (!WriteTrailer(pCreator->GetDocument(), archive, pCreator->GetIDArray()))
- return false;
-
- if (CPDF_Dictionary* encryptDict = pCreator->GetEncryptDict()) {
- uint32_t dwEncryptObjNum = encryptDict->GetObjNum();
- if (dwEncryptObjNum == 0)
- dwEncryptObjNum = pCreator->GetEncryptObjectNumber();
-
- if (!WriteEncryptDictObjectReference(dwEncryptObjNum, archive))
- return false;
- }
- }
-
- if (!archive->WriteString(">>stream\r\n") ||
- !archive->WriteBlock(encoder.GetData(), encoder.GetSize()) ||
- !archive->WriteString("\r\nendstream\r\nendobj\r\n")) {
- return false;
- }
-
- m_PrevOffset = offset_tmp;
- return true;
-}
-
-bool CPDF_XRefStream::End(CPDF_Creator* pCreator, bool bEOF) {
- if (!EndObjectStream(pCreator, bEOF))
- return false;
- return GenerateXRefStream(pCreator, bEOF);
-}
-
-bool CPDF_XRefStream::EndXRefStream(CPDF_Creator* pCreator) {
- if (!pCreator->IsIncremental()) {
- AppendIndex0(m_Buffer, true);
- for (uint32_t i = 1; i < pCreator->GetLastObjectNumber() + 1; i++) {
- if (pCreator->HasObjectNumber(i))
- AppendIndex1(m_Buffer, pCreator->GetObjectOffset(i));
- else
- AppendIndex0(m_Buffer, false);
- }
- } else {
- for (const auto& pair : m_IndexArray) {
- for (uint32_t j = pair.objnum; j < pair.objnum + pair.count; ++j)
- AppendIndex1(m_Buffer, pCreator->GetObjectOffset(j));
- }
- }
- return GenerateXRefStream(pCreator, false);
-}
-
-void CPDF_XRefStream::AddObjectNumberToIndexArray(uint32_t objnum) {
- if (m_IndexArray.empty()) {
- m_IndexArray.push_back({objnum, 1});
- return;
- }
-
- uint32_t next_objnum = m_IndexArray.back().objnum + m_IndexArray.back().count;
- if (objnum == next_objnum)
- m_IndexArray.back().count += 1;
- else
- m_IndexArray.push_back({objnum, 1});
-}