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-rw-r--r--core/fpdfapi/edit/fpdf_edit_create.cpp134
1 files changed, 53 insertions, 81 deletions
diff --git a/core/fpdfapi/edit/fpdf_edit_create.cpp b/core/fpdfapi/edit/fpdf_edit_create.cpp
index 537c970b53..63c0930c11 100644
--- a/core/fpdfapi/edit/fpdf_edit_create.cpp
+++ b/core/fpdfapi/edit/fpdf_edit_create.cpp
@@ -29,25 +29,14 @@
#include "third_party/base/ptr_util.h"
#include "third_party/base/stl_util.h"
-#define PDF_OBJECTSTREAM_MAXLENGTH (256 * 1024)
-#define PDF_XREFSTREAM_MAXSIZE 10000
-
-#define FX_GETBYTEOFFSET32(a) 0
-#define FX_GETBYTEOFFSET40(a) 0
-#define FX_GETBYTEOFFSET48(a) 0
-#define FX_GETBYTEOFFSET56(a) 0
-#define FX_GETBYTEOFFSET24(a) ((uint8_t)(a >> 24))
-#define FX_GETBYTEOFFSET16(a) ((uint8_t)(a >> 16))
-#define FX_GETBYTEOFFSET8(a) ((uint8_t)(a >> 8))
-#define FX_GETBYTEOFFSET0(a) ((uint8_t)(a))
-
-// TODO(ochang): Make helper for appending "objnum 0 R ".
-
namespace {
-int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
- CFX_FileBufferArchive* pFile,
- FX_FILESIZE& offset) {
+const uint32_t kXRefStreamMaxSize = 10000;
+const int kObjectStreamMaxLength = 256 * 1024;
+
+int32_t AppendObject(const CPDF_Object* pObj,
+ CFX_FileBufferArchive* pFile,
+ FX_FILESIZE& offset) {
int32_t len = 0;
if (!pObj) {
if (pFile->AppendString(" null") < 0)
@@ -122,7 +111,7 @@ int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
offset += len + 5;
} else {
- if (PDF_CreatorAppendObject(pElement, pFile, offset) < 0)
+ if (AppendObject(pElement, pFile, offset) < 0)
return -1;
}
}
@@ -157,7 +146,7 @@ int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
offset += len + 5;
} else {
- if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0)
+ if (AppendObject(pValue, pFile, offset) < 0)
return -1;
}
}
@@ -169,7 +158,7 @@ int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
}
case CPDF_Object::STREAM: {
const CPDF_Stream* p = pObj->AsStream();
- if (PDF_CreatorAppendObject(p->GetDict(), pFile, offset) < 0)
+ if (AppendObject(p->GetDict(), pFile, offset) < 0)
return -1;
if (pFile->AppendString("stream\r\n") < 0)
return -1;
@@ -194,9 +183,9 @@ int32_t PDF_CreatorAppendObject(const CPDF_Object* pObj,
return 1;
}
-int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument,
- CFX_FileBufferArchive* pFile,
- CPDF_Array* pIDArray) {
+int32_t WriteTrailer(CPDF_Document* pDocument,
+ CFX_FileBufferArchive* pFile,
+ CPDF_Array* pIDArray) {
FX_FILESIZE offset = 0;
int32_t len = 0;
CPDF_Parser* pParser = pDocument->GetParser();
@@ -228,7 +217,7 @@ int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument,
offset += len + 6;
} else {
- if (PDF_CreatorAppendObject(pValue, pFile, offset) < 0)
+ if (AppendObject(pValue, pFile, offset) < 0)
return -1;
}
}
@@ -237,7 +226,7 @@ int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument,
return -1;
offset += 3;
- if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0)
+ if (AppendObject(pIDArray, pFile, offset) < 0)
return -1;
}
return offset;
@@ -265,19 +254,16 @@ int32_t PDF_CreatorWriteTrailer(CPDF_Document* pDocument,
return -1;
offset += 3;
- if (PDF_CreatorAppendObject(pIDArray, pFile, offset) < 0)
+ if (AppendObject(pIDArray, pFile, offset) < 0)
return -1;
}
return offset;
}
-int32_t PDF_CreatorWriteEncrypt(const CPDF_Dictionary* pEncryptDict,
- uint32_t dwObjNum,
- CFX_FileBufferArchive* pFile) {
- if (!pEncryptDict)
- return 0;
-
+int32_t WriteEncryptDictObjectReference(uint32_t dwObjNum,
+ CFX_FileBufferArchive* pFile) {
ASSERT(pFile);
+
FX_FILESIZE offset = 0;
int32_t len = 0;
if (pFile->AppendString("/Encrypt") < 0)
@@ -295,7 +281,7 @@ int32_t PDF_CreatorWriteEncrypt(const CPDF_Dictionary* pEncryptDict,
return offset;
}
-std::vector<uint8_t> PDF_GenerateFileID(uint32_t dwSeed1, uint32_t dwSeed2) {
+std::vector<uint8_t> GenerateFileID(uint32_t dwSeed1, uint32_t dwSeed2) {
std::vector<uint8_t> buffer(sizeof(uint32_t) * 4);
uint32_t* pBuffer = reinterpret_cast<uint32_t*>(buffer.data());
void* pContext = FX_Random_MT_Start(dwSeed1);
@@ -325,22 +311,22 @@ void AppendIndex0(CFX_ByteTextBuf& buffer, bool bFirstObject) {
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(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(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));
+ 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));
}
bool IsXRefNeedEnd(CPDF_XRefStream* pXRef, uint32_t flag) {
@@ -351,29 +337,17 @@ bool IsXRefNeedEnd(CPDF_XRefStream* pXRef, uint32_t flag) {
for (const auto& pair : pXRef->m_IndexArray)
iCount += pair.count;
- return iCount >= PDF_XREFSTREAM_MAXSIZE;
+ return iCount >= kXRefStreamMaxSize;
}
int32_t OutputIndex(CFX_FileBufferArchive* pFile, FX_FILESIZE offset) {
- 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)
+ if (pFile->AppendByte(static_cast<uint8_t>(offset >> 24)) < 0)
return -1;
- if (pFile->AppendByte(FX_GETBYTEOFFSET16(offset)) < 0)
+ if (pFile->AppendByte(static_cast<uint8_t>(offset >> 16)) < 0)
return -1;
- if (pFile->AppendByte(FX_GETBYTEOFFSET8(offset)) < 0)
+ if (pFile->AppendByte(static_cast<uint8_t>(offset >> 8)) < 0)
return -1;
- if (pFile->AppendByte(FX_GETBYTEOFFSET0(offset)) < 0)
+ if (pFile->AppendByte(static_cast<uint8_t>(offset)) < 0)
return -1;
if (pFile->AppendByte(0) < 0)
return -1;
@@ -397,14 +371,6 @@ class CPDF_FlateEncoder {
CFX_RetainPtr<CPDF_StreamAcc> m_pAcc;
};
-void CPDF_FlateEncoder::CloneDict() {
- if (m_pDict.IsOwned())
- return;
-
- m_pDict = ToDictionary(m_pDict->Clone());
- ASSERT(m_pDict.IsOwned());
-}
-
CPDF_FlateEncoder::CPDF_FlateEncoder(CPDF_Stream* pStream, bool bFlateEncode)
: m_dwSize(0), m_pAcc(pdfium::MakeRetain<CPDF_StreamAcc>(pStream)) {
m_pAcc->LoadAllData(true);
@@ -455,6 +421,14 @@ CPDF_FlateEncoder::CPDF_FlateEncoder(const uint8_t* pBuffer,
CPDF_FlateEncoder::~CPDF_FlateEncoder() {}
+void CPDF_FlateEncoder::CloneDict() {
+ if (m_pDict.IsOwned())
+ return;
+
+ m_pDict = ToDictionary(m_pDict->Clone());
+ ASSERT(m_pDict.IsOwned());
+}
+
class CPDF_Encryptor {
public:
CPDF_Encryptor(CPDF_CryptoHandler* pHandler,
@@ -603,7 +577,7 @@ int32_t CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
m_ObjStream.CompressIndirectObject(dwObjNum, pObj);
if (pdfium::CollectionSize<int32_t>(m_ObjStream.m_Items) <
pCreator->m_ObjectStreamSize &&
- m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) {
+ m_ObjStream.m_Buffer.GetLength() < kObjectStreamMaxLength) {
return 1;
}
return EndObjectStream(pCreator);
@@ -619,7 +593,7 @@ int32_t CPDF_XRefStream::CompressIndirectObject(uint32_t dwObjNum,
m_ObjStream.CompressIndirectObject(dwObjNum, pBuffer, dwSize);
if (pdfium::CollectionSize<int32_t>(m_ObjStream.m_Items) <
pCreator->m_ObjectStreamSize &&
- m_ObjStream.m_Buffer.GetLength() < PDF_OBJECTSTREAM_MAXLENGTH) {
+ m_ObjStream.m_Buffer.GetLength() < kObjectStreamMaxLength) {
return 1;
}
return EndObjectStream(pCreator);
@@ -786,8 +760,8 @@ bool CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator, bool bEOF) {
offset += len + 8;
if (bEOF) {
- if ((len = PDF_CreatorWriteTrailer(pCreator->m_pDocument, pFile,
- pCreator->m_pIDArray.get())) < 0) {
+ if ((len = WriteTrailer(pCreator->m_pDocument, pFile,
+ pCreator->m_pIDArray.get())) < 0) {
return false;
}
offset += len;
@@ -795,8 +769,7 @@ bool CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator, bool bEOF) {
uint32_t dwEncryptObjNum = pCreator->m_pEncryptDict->GetObjNum();
if (dwEncryptObjNum == 0)
dwEncryptObjNum = pCreator->m_dwEncryptObjNum;
- if ((len = PDF_CreatorWriteEncrypt(pCreator->m_pEncryptDict,
- dwEncryptObjNum, pFile)) < 0) {
+ if ((len = WriteEncryptDictObjectReference(dwEncryptObjNum, pFile)) < 0) {
return false;
}
offset += len;
@@ -1144,7 +1117,7 @@ int32_t CPDF_Creator::WriteDirectObj(uint32_t objnum,
}
case CPDF_Object::DICTIONARY: {
if (!m_pCryptoHandler || pObj == m_pEncryptDict)
- return PDF_CreatorAppendObject(pObj, &m_File, m_Offset);
+ return AppendObject(pObj, &m_File, m_Offset);
if (m_File.AppendString("<<") < 0)
return -1;
@@ -1582,8 +1555,7 @@ int32_t CPDF_Creator::WriteDoc_Stage4() {
for (const auto& it : *p) {
const CFX_ByteString& key = it.first;
CPDF_Object* pValue = it.second.get();
- // TODO(ochang): Consolidate with similar check in
- // PDF_CreatorWriteTrailer.
+ // TODO(ochang): Consolidate with similar check in WriteTrailer.
if (key == "Encrypt" || key == "Size" || key == "Filter" ||
key == "Index" || key == "Length" || key == "Prev" || key == "W" ||
key == "XRefStm" || key == "ID") {
@@ -1602,7 +1574,7 @@ int32_t CPDF_Creator::WriteDoc_Stage4() {
return -1;
} else {
FX_FILESIZE offset = 0;
- if (PDF_CreatorAppendObject(pValue, &m_File, offset) < 0)
+ if (AppendObject(pValue, &m_File, offset) < 0)
return -1;
}
}
@@ -1659,7 +1631,7 @@ int32_t CPDF_Creator::WriteDoc_Stage4() {
return -1;
FX_FILESIZE offset = 0;
- if (PDF_CreatorAppendObject(m_pIDArray.get(), &m_File, offset) < 0)
+ if (AppendObject(m_pIDArray.get(), &m_File, offset) < 0)
return -1;
}
if (!bXRefStream) {
@@ -1765,7 +1737,7 @@ void CPDF_Creator::InitID(bool bDefault) {
m_pIDArray->Add(pID1->Clone());
} else {
std::vector<uint8_t> buffer =
- PDF_GenerateFileID((uint32_t)(uintptr_t) this, m_dwLastObjNum);
+ GenerateFileID((uint32_t)(uintptr_t)this, m_dwLastObjNum);
CFX_ByteString bsBuffer(buffer.data(), buffer.size());
m_pIDArray->AddNew<CPDF_String>(bsBuffer, true);
}
@@ -1780,7 +1752,7 @@ void CPDF_Creator::InitID(bool bDefault) {
return;
}
std::vector<uint8_t> buffer =
- PDF_GenerateFileID((uint32_t)(uintptr_t) this, m_dwLastObjNum);
+ GenerateFileID((uint32_t)(uintptr_t)this, m_dwLastObjNum);
CFX_ByteString bsBuffer(buffer.data(), buffer.size());
m_pIDArray->AddNew<CPDF_String>(bsBuffer, true);
return;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 02:05:57 +0000