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authorDan Sinclair <dsinclair@chromium.org>2017-05-10 13:59:14 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-05-10 19:41:00 +0000
commit5b590337e0778b49dd7092af4a283ed0f9c5a2e9 (patch)
tree4aae9dd27685bf2cca6954d5a1a7ef197466b808 /core/fpdfapi/edit
parentaa7022833db1a6e21b81fcca30b45ba652298f32 (diff)
downloadpdfium-5b590337e0778b49dd7092af4a283ed0f9c5a2e9.tar.xz
Store the offset in the archive buffer
This Cl moves the implementation of the archive buffer behind an IFX_ArchiveStream interface. The buffer holds the current offset and the offset parameter is removed from the CPDF_Creator and various other methods. Change-Id: Ia54e803b58bbfb6ef03fec4a940d2c056d541356 Reviewed-on: https://pdfium-review.googlesource.com/5255 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
Diffstat (limited to 'core/fpdfapi/edit')
-rw-r--r--core/fpdfapi/edit/cpdf_creator.cpp399
-rw-r--r--core/fpdfapi/edit/cpdf_creator.h9
-rw-r--r--core/fpdfapi/edit/cpdf_objectstream.cpp56
-rw-r--r--core/fpdfapi/edit/cpdf_xrefstream.cpp202
4 files changed, 283 insertions, 383 deletions
diff --git a/core/fpdfapi/edit/cpdf_creator.cpp b/core/fpdfapi/edit/cpdf_creator.cpp
index 0aa9fb0b1b..e782de3dbc 100644
--- a/core/fpdfapi/edit/cpdf_creator.cpp
+++ b/core/fpdfapi/edit/cpdf_creator.cpp
@@ -6,6 +6,8 @@
#include "core/fpdfapi/edit/cpdf_creator.h"
+#include <algorithm>
+
#include "core/fpdfapi/edit/cpdf_encryptor.h"
#include "core/fpdfapi/edit/cpdf_flateencoder.h"
#include "core/fpdfapi/edit/cpdf_objectstream.h"
@@ -23,6 +25,91 @@
namespace {
const uint32_t kXRefStreamMaxSize = 10000;
+const size_t kArchiveBufferSize = 32768;
+
+class CFX_FileBufferArchive : public IFX_ArchiveStream {
+ public:
+ explicit CFX_FileBufferArchive(const CFX_RetainPtr<IFX_WriteStream>& archive);
+ ~CFX_FileBufferArchive() override;
+
+ bool WriteBlock(const void* pBuf, size_t size) override;
+ bool WriteByte(uint8_t byte) override;
+ bool WriteDWord(uint32_t i) override;
+ bool WriteString(const CFX_ByteStringC& str) override;
+
+ FX_FILESIZE CurrentOffset() const override { return offset_; }
+
+ private:
+ bool Flush();
+
+ FX_FILESIZE offset_;
+ size_t current_length_;
+ std::vector<uint8_t> buffer_;
+ CFX_RetainPtr<IFX_WriteStream> backing_file_;
+};
+
+CFX_FileBufferArchive::CFX_FileBufferArchive(
+ const CFX_RetainPtr<IFX_WriteStream>& file)
+ : offset_(0),
+ current_length_(0),
+ buffer_(kArchiveBufferSize),
+ backing_file_(file) {
+ ASSERT(file);
+}
+
+CFX_FileBufferArchive::~CFX_FileBufferArchive() {
+ Flush();
+}
+
+bool CFX_FileBufferArchive::Flush() {
+ size_t nRemaining = current_length_;
+ current_length_ = 0;
+ if (!backing_file_)
+ return false;
+ if (!nRemaining)
+ return true;
+ return backing_file_->WriteBlock(buffer_.data(), nRemaining);
+}
+
+bool CFX_FileBufferArchive::WriteBlock(const void* pBuf, size_t size) {
+ ASSERT(pBuf && size > 0);
+
+ const uint8_t* buffer = reinterpret_cast<const uint8_t*>(pBuf);
+ size_t temp_size = size;
+ while (temp_size) {
+ size_t buf_size = std::min(kArchiveBufferSize - current_length_, temp_size);
+ memcpy(buffer_.data() + current_length_, buffer, buf_size);
+
+ current_length_ += buf_size;
+ if (current_length_ == kArchiveBufferSize && !Flush())
+ return false;
+
+ temp_size -= buf_size;
+ buffer += buf_size;
+ }
+
+ pdfium::base::CheckedNumeric<FX_FILESIZE> safe_offset = offset_;
+ safe_offset += size;
+ if (!safe_offset.IsValid())
+ return false;
+
+ offset_ = safe_offset.ValueOrDie();
+ return true;
+}
+
+bool CFX_FileBufferArchive::WriteByte(uint8_t byte) {
+ return WriteBlock(&byte, 1);
+}
+
+bool CFX_FileBufferArchive::WriteDWord(uint32_t i) {
+ char buf[32];
+ FXSYS_itoa(i, buf, 10);
+ return WriteBlock(buf, static_cast<size_t>(FXSYS_strlen(buf)));
+}
+
+bool CFX_FileBufferArchive::WriteString(const CFX_ByteStringC& str) {
+ return WriteBlock(str.raw_str(), str.GetLength());
+}
std::vector<uint8_t> GenerateFileID(uint32_t dwSeed1, uint32_t dwSeed2) {
std::vector<uint8_t> buffer(sizeof(uint32_t) * 4);
@@ -40,12 +127,12 @@ std::vector<uint8_t> GenerateFileID(uint32_t dwSeed1, uint32_t dwSeed2) {
return buffer;
}
-int32_t OutputIndex(CFX_FileBufferArchive* pFile, FX_FILESIZE offset) {
- if (pFile->AppendByte(static_cast<uint8_t>(offset >> 24)) < 0 ||
- pFile->AppendByte(static_cast<uint8_t>(offset >> 16)) < 0 ||
- pFile->AppendByte(static_cast<uint8_t>(offset >> 8)) < 0 ||
- pFile->AppendByte(static_cast<uint8_t>(offset)) < 0 ||
- pFile->AppendByte(0) < 0) {
+int32_t OutputIndex(IFX_ArchiveStream* archive, FX_FILESIZE offset) {
+ if (!archive->WriteByte(static_cast<uint8_t>(offset >> 24)) ||
+ !archive->WriteByte(static_cast<uint8_t>(offset >> 16)) ||
+ !archive->WriteByte(static_cast<uint8_t>(offset >> 8)) ||
+ !archive->WriteByte(static_cast<uint8_t>(offset)) ||
+ !archive->WriteByte(0)) {
return -1;
}
return 0;
@@ -54,7 +141,7 @@ int32_t OutputIndex(CFX_FileBufferArchive* pFile, FX_FILESIZE offset) {
} // namespace
CPDF_Creator::CPDF_Creator(CPDF_Document* pDoc,
- const CFX_RetainPtr<IFX_WriteStream>& pFile)
+ const CFX_RetainPtr<IFX_WriteStream>& archive)
: m_pDocument(pDoc),
m_pParser(pDoc->GetParser()),
m_bSecurityChanged(false),
@@ -63,20 +150,16 @@ CPDF_Creator::CPDF_Creator(CPDF_Document* pDoc,
m_pCryptoHandler(m_pParser ? m_pParser->GetCryptoHandler() : nullptr),
m_pMetadata(nullptr),
m_dwLastObjNum(m_pDocument->GetLastObjNum()),
- m_Offset(0),
+ m_Archive(pdfium::MakeUnique<CFX_FileBufferArchive>(archive)),
m_SavedOffset(0),
m_iStage(-1),
m_dwFlags(0),
m_CurObjNum(0),
m_XrefStart(0),
m_pIDArray(nullptr),
- m_FileVersion(0) {
- m_File.AttachFile(pFile);
-}
+ m_FileVersion(0) {}
-CPDF_Creator::~CPDF_Creator() {
- Clear();
-}
+CPDF_Creator::~CPDF_Creator() {}
bool CPDF_Creator::IsXRefNeedEnd() {
if (!IsIncremental())
@@ -125,36 +208,19 @@ bool CPDF_Creator::WriteStream(const CPDF_Object* pStream,
encoder.GetDict()->SetNewFor<CPDF_Number>(
"Length", static_cast<int>(encryptor.GetSize()));
}
- if (!WriteDirectObj(objnum, encoder.GetDict(), true))
- return false;
-
- int len = m_File.AppendString("stream\r\n");
- if (len < 0)
- return false;
- m_Offset += len;
-
- if (m_File.AppendBlock(encryptor.GetData(), encryptor.GetSize()) < 0)
+ if (!WriteDirectObj(objnum, encoder.GetDict(), true) ||
+ !m_Archive->WriteString("stream\r\n") ||
+ !m_Archive->WriteBlock(encryptor.GetData(), encryptor.GetSize()) ||
+ !m_Archive->WriteString("\r\nendstream")) {
return false;
- m_Offset += encryptor.GetSize();
-
- len = m_File.AppendString("\r\nendstream");
- if (len < 0)
- return false;
- m_Offset += len;
+ }
return true;
}
bool CPDF_Creator::WriteIndirectObj(uint32_t objnum, const CPDF_Object* pObj) {
- int32_t len = m_File.AppendDWord(objnum);
- if (len < 0)
- return false;
- m_Offset += len;
-
- len = m_File.AppendString(" 0 obj\r\n");
- if (len < 0)
+ if (!m_Archive->WriteDWord(objnum) || !m_Archive->WriteString(" 0 obj\r\n"))
return false;
- m_Offset += len;
if (pObj->IsStream()) {
CPDF_CryptoHandler* pHandler =
@@ -165,13 +231,10 @@ bool CPDF_Creator::WriteIndirectObj(uint32_t objnum, const CPDF_Object* pObj) {
return false;
}
- len = m_File.AppendString("\r\nendobj\r\n");
- if (len < 0)
- return false;
-
- m_Offset += len;
- if (!AppendObjectNumberToXRef(objnum))
+ if (!m_Archive->WriteString("\r\nendobj\r\n") ||
+ !AppendObjectNumberToXRef(objnum)) {
return false;
+ }
return true;
}
@@ -214,7 +277,7 @@ bool CPDF_Creator::WriteDirectObj(uint32_t objnum,
case CPDF_Object::NULLOBJ:
case CPDF_Object::NUMBER:
case CPDF_Object::REFERENCE:
- if (!pObj->WriteTo(&m_File, &m_Offset))
+ if (!pObj->WriteTo(m_Archive.get()))
return false;
break;
@@ -222,7 +285,7 @@ bool CPDF_Creator::WriteDirectObj(uint32_t objnum,
CFX_ByteString str = pObj->GetString();
bool bHex = pObj->AsString()->IsHex();
if (!m_pCryptoHandler || !bEncrypt) {
- if (!pObj->WriteTo(&m_File, &m_Offset))
+ if (!pObj->WriteTo(m_Archive.get()))
return false;
break;
}
@@ -230,11 +293,8 @@ bool CPDF_Creator::WriteDirectObj(uint32_t objnum,
(uint8_t*)str.c_str(), str.GetLength());
CFX_ByteString content = PDF_EncodeString(
CFX_ByteString(encryptor.GetData(), encryptor.GetSize()), bHex);
- int32_t len = m_File.AppendString(content.AsStringC());
- if (len < 0)
+ if (!m_Archive->WriteString(content.AsStringC()))
return false;
-
- m_Offset += len;
break;
}
case CPDF_Object::STREAM: {
@@ -248,94 +308,71 @@ bool CPDF_Creator::WriteDirectObj(uint32_t objnum,
encoder.GetDict()->SetNewFor<CPDF_Number>(
"Length", static_cast<int>(encryptor.GetSize()));
}
- if (!WriteDirectObj(objnum, encoder.GetDict(), true))
+ if (!WriteDirectObj(objnum, encoder.GetDict(), true) ||
+ !m_Archive->WriteString("stream\r\n") ||
+ !m_Archive->WriteBlock(encryptor.GetData(), encryptor.GetSize()) ||
+ !m_Archive->WriteString("\r\nendstream")) {
return false;
-
- int32_t len = m_File.AppendString("stream\r\n");
- if (len < 0)
- return false;
- m_Offset += len;
-
- if (m_File.AppendBlock(encryptor.GetData(), encryptor.GetSize()) < 0)
- return false;
- m_Offset += encryptor.GetSize();
-
- len = m_File.AppendString("\r\nendstream");
- if (len < 0)
- return false;
- m_Offset += len;
+ }
break;
}
case CPDF_Object::ARRAY: {
- if (m_File.AppendString("[") < 0)
+ if (!m_Archive->WriteString("["))
return false;
- m_Offset += 1;
const CPDF_Array* p = pObj->AsArray();
for (size_t i = 0; i < p->GetCount(); i++) {
CPDF_Object* pElement = p->GetObjectAt(i);
if (!pElement->IsInline()) {
- if (m_File.AppendString(" ") < 0)
- return false;
-
- int32_t len = m_File.AppendDWord(pElement->GetObjNum());
- if (len < 0 || m_File.AppendString(" 0 R") < 0)
+ if (!m_Archive->WriteString(" ") ||
+ !m_Archive->WriteDWord(pElement->GetObjNum()) ||
+ !m_Archive->WriteString(" 0 R")) {
return false;
- m_Offset += len + 5;
+ }
} else if (!WriteDirectObj(objnum, pElement, true)) {
return false;
}
}
- if (m_File.AppendString("]") < 0)
+ if (!m_Archive->WriteString("]"))
return false;
-
- m_Offset += 1;
break;
}
case CPDF_Object::DICTIONARY: {
if (!m_pCryptoHandler || pObj == m_pEncryptDict) {
- if (!pObj->WriteTo(&m_File, &m_Offset))
+ if (!pObj->WriteTo(m_Archive.get()))
return false;
break;
}
- if (m_File.AppendString("<<") < 0)
+ if (!m_Archive->WriteString("<<"))
return false;
- m_Offset += 2;
const CPDF_Dictionary* p = pObj->AsDictionary();
bool bSignDict = p->IsSignatureDict();
for (const auto& it : *p) {
bool bSignValue = false;
const CFX_ByteString& key = it.first;
CPDF_Object* pValue = it.second.get();
- if (m_File.AppendString("/") < 0)
+ if (!m_Archive->WriteString("/") ||
+ !m_Archive->WriteString(PDF_NameEncode(key).AsStringC())) {
return false;
-
- int32_t len = m_File.AppendString(PDF_NameEncode(key).AsStringC());
- if (len < 0)
- return false;
- m_Offset += len + 1;
+ }
if (bSignDict && key == "Contents")
bSignValue = true;
if (!pValue->IsInline()) {
- if (m_File.AppendString(" ") < 0)
- return false;
-
- len = m_File.AppendDWord(pValue->GetObjNum());
- if (len < 0 || m_File.AppendString(" 0 R ") < 0)
+ if (!m_Archive->WriteString(" ") ||
+ !m_Archive->WriteDWord(pValue->GetObjNum()) ||
+ !m_Archive->WriteString(" 0 R ")) {
return false;
- m_Offset += len + 6;
+ }
} else if (!WriteDirectObj(objnum, pValue, !bSignValue)) {
return false;
}
}
- if (m_File.AppendString(">>") < 0)
+ if (!m_Archive->WriteString(">>"))
return false;
-
- m_Offset += 2;
break;
}
}
@@ -346,7 +383,8 @@ bool CPDF_Creator::WriteOldIndirectObject(uint32_t objnum) {
if (m_pParser->IsObjectFreeOrNull(objnum))
return true;
- m_ObjectOffsets[objnum] = m_Offset;
+ m_ObjectOffsets[objnum] = m_Archive->CurrentOffset();
+
bool bExistInMap = !!m_pDocument->GetIndirectObject(objnum);
const uint8_t object_type = m_pParser->GetObjectType(objnum);
if (m_pParser->IsVersionUpdated() || m_bSecurityChanged || bExistInMap ||
@@ -373,26 +411,18 @@ bool CPDF_Creator::WriteOldIndirectObject(uint32_t objnum) {
return false;
}
} else {
- int32_t len = m_File.AppendDWord(objnum);
- if (len < 0 || m_File.AppendString(" 0 obj ") < 0)
- return false;
- m_Offset += len + 7;
-
- if (m_File.AppendBlock(pBuffer, size) < 0)
+ if (!m_Archive->WriteDWord(objnum) ||
+ !m_Archive->WriteString(" 0 obj ") ||
+ !m_Archive->WriteBlock(pBuffer, size) ||
+ !m_Archive->WriteString("\r\nendobj\r\n")) {
return false;
- m_Offset += size;
-
- if (m_File.AppendString("\r\nendobj\r\n") < 0)
- return false;
- m_Offset += 10;
+ }
}
} else {
- if (m_File.AppendBlock(pBuffer, size) < 0)
- return false;
- m_Offset += size;
-
- if (!AppendObjectNumberToXRef(objnum))
+ if (!m_Archive->WriteBlock(pBuffer, size) ||
+ !AppendObjectNumberToXRef(objnum)) {
return false;
+ }
}
FX_Free(pBuffer);
}
@@ -418,7 +448,7 @@ bool CPDF_Creator::WriteNewObjs() {
if (!pObj)
continue;
- m_ObjectOffsets[objnum] = m_Offset;
+ m_ObjectOffsets[objnum] = m_Archive->CurrentOffset();
if (!WriteIndirectObj(pObj))
return false;
}
@@ -483,9 +513,8 @@ int32_t CPDF_Creator::WriteDoc_Stage1() {
}
if (m_iStage == 10) {
if (!IsIncremental()) {
- if (m_File.AppendString("%PDF-1.") < 0)
+ if (!m_Archive->WriteString("%PDF-1."))
return -1;
- m_Offset += 7;
int32_t version = 7;
if (m_FileVersion)
@@ -493,21 +522,15 @@ int32_t CPDF_Creator::WriteDoc_Stage1() {
else if (m_pParser)
version = m_pParser->GetFileVersion();
- int32_t len = m_File.AppendDWord(version % 10);
- if (len < 0)
- return -1;
- m_Offset += len;
-
- len = m_File.AppendString("\r\n%\xA1\xB3\xC5\xD7\r\n");
- if (len < 0)
+ if (!m_Archive->WriteDWord(version % 10) ||
+ !m_Archive->WriteString("\r\n%\xA1\xB3\xC5\xD7\r\n")) {
return -1;
- m_Offset += len;
+ }
InitOldObjNumOffsets();
m_iStage = 20;
} else {
- m_Offset = m_pParser->GetFileAccess()->GetSize();
- m_SavedOffset = m_Offset;
+ m_SavedOffset = m_pParser->GetFileAccess()->GetSize();
m_iStage = 15;
}
}
@@ -519,11 +542,12 @@ int32_t CPDF_Creator::WriteDoc_Stage1() {
FX_FILESIZE src_size = m_SavedOffset;
while (src_size) {
uint32_t block_size = src_size > 4096 ? 4096 : src_size;
- if (!pSrcFile->ReadBlock(buffer.data(), m_Offset - src_size,
+ if (!pSrcFile->ReadBlock(buffer.data(),
+ m_Archive->CurrentOffset() - src_size,
block_size)) {
return -1;
}
- if (m_File.AppendBlock(buffer.data(), block_size) < 0)
+ if (!m_Archive->WriteBlock(buffer.data(), block_size))
return -1;
src_size -= block_size;
@@ -580,7 +604,7 @@ int32_t CPDF_Creator::WriteDoc_Stage2() {
if (m_iStage == 27) {
if (m_pEncryptDict && m_pEncryptDict->IsInline()) {
m_dwLastObjNum += 1;
- FX_FILESIZE saveOffset = m_Offset;
+ FX_FILESIZE saveOffset = m_Archive->CurrentOffset();
if (!WriteIndirectObj(m_dwLastObjNum, m_pEncryptDict))
return -1;
@@ -599,7 +623,7 @@ int32_t CPDF_Creator::WriteDoc_Stage3() {
uint32_t dwLastObjNum = m_dwLastObjNum;
if (m_iStage == 80) {
- m_XrefStart = m_Offset;
+ m_XrefStart = m_Archive->CurrentOffset();
if (HasObjectStream()) {
m_pXRefStream->End(this, true);
m_XrefStart = m_pXRefStream->GetPreviousOffset();
@@ -610,13 +634,13 @@ int32_t CPDF_Creator::WriteDoc_Stage3() {
str = pdfium::ContainsKey(m_ObjectOffsets, 1)
? "xref\r\n"
: "xref\r\n0 1\r\n0000000000 65535 f\r\n";
- if (m_File.AppendString(str.AsStringC()) < 0)
+ if (!m_Archive->WriteString(str.AsStringC()))
return -1;
m_CurObjNum = 1;
m_iStage = 81;
} else {
- if (m_File.AppendString("xref\r\n") < 0)
+ if (!m_Archive->WriteString("xref\r\n"))
return -1;
m_CurObjNum = 0;
@@ -646,12 +670,12 @@ int32_t CPDF_Creator::WriteDoc_Stage3() {
else
str.Format("%d %d\r\n", i, j - i);
- if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0)
+ if (!m_Archive->WriteBlock(str.c_str(), str.GetLength()))
return -1;
while (i < j) {
str.Format("%010d 00000 n\r\n", m_ObjectOffsets[i++]);
- if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0)
+ if (!m_Archive->WriteBlock(str.c_str(), str.GetLength()))
return -1;
}
if (i > dwLastObjNum)
@@ -680,13 +704,13 @@ int32_t CPDF_Creator::WriteDoc_Stage3() {
else
str.Format("%d %d\r\n", objnum, j - i);
- if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0)
+ if (!m_Archive->WriteBlock(str.c_str(), str.GetLength()))
return -1;
while (i < j) {
objnum = m_NewObjNumArray[i++];
str.Format("%010d 00000 n\r\n", m_ObjectOffsets[objnum]);
- if (m_File.AppendBlock(str.c_str(), str.GetLength()) < 0)
+ if (!m_Archive->WriteBlock(str.c_str(), str.GetLength()))
return -1;
}
}
@@ -701,11 +725,11 @@ int32_t CPDF_Creator::WriteDoc_Stage4() {
if (!HasObjectStream()) {
bool bXRefStream = IsIncremental() && m_pParser->IsXRefStream();
if (!bXRefStream) {
- if (m_File.AppendString("trailer\r\n<<") < 0)
+ if (!m_Archive->WriteString("trailer\r\n<<"))
return -1;
} else {
- if (m_File.AppendDWord(m_pDocument->GetLastObjNum() + 1) < 0 ||
- m_File.AppendString(" 0 obj <<") < 0) {
+ if (!m_Archive->WriteDWord(m_pDocument->GetLastObjNum() + 1) ||
+ !m_Archive->WriteString(" 0 obj <<")) {
return -1;
}
}
@@ -722,147 +746,135 @@ int32_t CPDF_Creator::WriteDoc_Stage4() {
key == "XRefStm" || key == "ID") {
continue;
}
- if (m_File.AppendString(("/")) < 0 ||
- m_File.AppendString(PDF_NameEncode(key).AsStringC()) < 0) {
+ if (!m_Archive->WriteString(("/")) ||
+ !m_Archive->WriteString(PDF_NameEncode(key).AsStringC())) {
return -1;
}
if (!pValue->IsInline()) {
- if (m_File.AppendString(" ") < 0 ||
- m_File.AppendDWord(pValue->GetObjNum()) < 0 ||
- m_File.AppendString(" 0 R ") < 0) {
+ if (!m_Archive->WriteString(" ") ||
+ !m_Archive->WriteDWord(pValue->GetObjNum()) ||
+ !m_Archive->WriteString(" 0 R ")) {
return -1;
}
- } else {
- FX_FILESIZE offset = 0;
- if (!pValue->WriteTo(&m_File, &offset))
- return -1;
+ } else if (!pValue->WriteTo(m_Archive.get())) {
+ return -1;
}
}
} else {
- if (m_File.AppendString("\r\n/Root ") < 0 ||
- m_File.AppendDWord(m_pDocument->GetRoot()->GetObjNum()) < 0 ||
- m_File.AppendString(" 0 R\r\n") < 0) {
+ if (!m_Archive->WriteString("\r\n/Root ") ||
+ !m_Archive->WriteDWord(m_pDocument->GetRoot()->GetObjNum()) ||
+ !m_Archive->WriteString(" 0 R\r\n")) {
return -1;
}
if (m_pDocument->GetInfo()) {
- if (m_File.AppendString("/Info ") < 0 ||
- m_File.AppendDWord(m_pDocument->GetInfo()->GetObjNum()) < 0 ||
- m_File.AppendString(" 0 R\r\n") < 0) {
+ if (!m_Archive->WriteString("/Info ") ||
+ !m_Archive->WriteDWord(m_pDocument->GetInfo()->GetObjNum()) ||
+ !m_Archive->WriteString(" 0 R\r\n")) {
return -1;
}
}
}
if (m_pEncryptDict) {
- if (m_File.AppendString("/Encrypt") < 0)
+ if (!m_Archive->WriteString("/Encrypt"))
return -1;
uint32_t dwObjNum = m_pEncryptDict->GetObjNum();
if (dwObjNum == 0)
dwObjNum = m_pDocument->GetLastObjNum() + 1;
- if (m_File.AppendString(" ") < 0 || m_File.AppendDWord(dwObjNum) < 0 ||
- m_File.AppendString(" 0 R ") < 0) {
+ if (!m_Archive->WriteString(" ") || !m_Archive->WriteDWord(dwObjNum) ||
+ !m_Archive->WriteString(" 0 R ")) {
return -1;
}
}
- if (m_File.AppendString("/Size ") < 0 ||
- m_File.AppendDWord(m_dwLastObjNum + (bXRefStream ? 2 : 1)) < 0) {
+ if (!m_Archive->WriteString("/Size ") ||
+ !m_Archive->WriteDWord(m_dwLastObjNum + (bXRefStream ? 2 : 1))) {
return -1;
}
if (IsIncremental()) {
FX_FILESIZE prev = m_pParser->GetLastXRefOffset();
if (prev) {
- if (m_File.AppendString("/Prev ") < 0)
+ if (!m_Archive->WriteString("/Prev "))
return -1;
char offset_buf[20];
memset(offset_buf, 0, sizeof(offset_buf));
FXSYS_i64toa(prev, offset_buf, 10);
- if (m_File.AppendBlock(offset_buf, FXSYS_strlen(offset_buf)) < 0)
+ if (!m_Archive->WriteBlock(offset_buf, FXSYS_strlen(offset_buf)))
return -1;
}
}
if (m_pIDArray) {
- if (m_File.AppendString(("/ID")) < 0)
- return -1;
-
- FX_FILESIZE offset = 0;
- if (!m_pIDArray->WriteTo(&m_File, &offset))
+ if (!m_Archive->WriteString(("/ID")) ||
+ !m_pIDArray->WriteTo(m_Archive.get())) {
return -1;
+ }
}
if (!bXRefStream) {
- if (m_File.AppendString(">>") < 0)
+ if (!m_Archive->WriteString(">>"))
return -1;
} else {
- if (m_File.AppendString("/W[0 4 1]/Index[") < 0)
+ if (!m_Archive->WriteString("/W[0 4 1]/Index["))
return -1;
if (IsIncremental() && m_pParser && m_pParser->GetLastXRefOffset() == 0) {
uint32_t i = 0;
for (i = 0; i < m_dwLastObjNum; i++) {
if (!pdfium::ContainsKey(m_ObjectOffsets, i))
continue;
- if (m_File.AppendDWord(i) < 0 || m_File.AppendString(" 1 ") < 0)
+ if (!m_Archive->WriteDWord(i) || !m_Archive->WriteString(" 1 "))
return -1;
}
- if (m_File.AppendString("]/Length ") < 0 ||
- m_File.AppendDWord(m_dwLastObjNum * 5) < 0 ||
- m_File.AppendString(">>stream\r\n") < 0) {
+ if (!m_Archive->WriteString("]/Length ") ||
+ !m_Archive->WriteDWord(m_dwLastObjNum * 5) ||
+ !m_Archive->WriteString(">>stream\r\n")) {
return -1;
}
for (i = 0; i < m_dwLastObjNum; i++) {
auto it = m_ObjectOffsets.find(i);
if (it == m_ObjectOffsets.end())
continue;
- OutputIndex(&m_File, it->second);
+ OutputIndex(m_Archive.get(), it->second);
}
} else {
size_t count = m_NewObjNumArray.size();
size_t i = 0;
for (i = 0; i < count; i++) {
- if (m_File.AppendDWord(m_NewObjNumArray[i]) < 0 ||
- m_File.AppendString(" 1 ") < 0) {
+ if (!m_Archive->WriteDWord(m_NewObjNumArray[i]) ||
+ !m_Archive->WriteString(" 1 ")) {
return -1;
}
}
- if (m_File.AppendString("]/Length ") < 0 ||
- m_File.AppendDWord(count * 5) < 0 ||
- m_File.AppendString(">>stream\r\n") < 0) {
+ if (!m_Archive->WriteString("]/Length ") ||
+ !m_Archive->WriteDWord(count * 5) ||
+ !m_Archive->WriteString(">>stream\r\n")) {
return -1;
}
for (i = 0; i < count; ++i)
- OutputIndex(&m_File, m_ObjectOffsets[m_NewObjNumArray[i]]);
+ OutputIndex(m_Archive.get(), m_ObjectOffsets[m_NewObjNumArray[i]]);
}
- if (m_File.AppendString("\r\nendstream") < 0)
+ if (!m_Archive->WriteString("\r\nendstream"))
return -1;
}
}
- if (m_File.AppendString("\r\nstartxref\r\n") < 0)
+ if (!m_Archive->WriteString("\r\nstartxref\r\n"))
return -1;
char offset_buf[20];
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 ||
- m_File.AppendString("\r\n%%EOF\r\n") < 0) {
+ if (!m_Archive->WriteBlock(offset_buf, FXSYS_strlen(offset_buf)) ||
+ !m_Archive->WriteString("\r\n%%EOF\r\n")) {
return -1;
}
- m_File.Flush();
- return m_iStage = 100;
-}
-
-void CPDF_Creator::Clear() {
- m_pXRefStream.reset();
- m_File.Clear();
- m_NewObjNumArray.clear();
- m_pIDArray.reset();
+ m_iStage = 100;
+ return m_iStage;
}
bool CPDF_Creator::Create(uint32_t flags) {
m_dwFlags = flags;
m_iStage = 0;
- m_Offset = 0;
m_dwLastObjNum = m_pDocument->GetLastObjNum();
m_ObjectOffsets.clear();
m_NewObjNumArray.clear();
@@ -939,7 +951,6 @@ int32_t CPDF_Creator::Continue() {
if (iRet < 1 || m_iStage == 100) {
m_iStage = -1;
- Clear();
return iRet > 99 ? 0 : (iRet < 1 ? -1 : iRet);
}
return m_iStage;
@@ -952,12 +963,6 @@ bool CPDF_Creator::SetFileVersion(int32_t fileVersion) {
return true;
}
-void CPDF_Creator::IncrementOffset(FX_FILESIZE inc) {
- pdfium::base::CheckedNumeric<FX_FILESIZE> size = m_Offset;
- size += inc;
- m_Offset = size.ValueOrDie();
-}
-
void CPDF_Creator::RemoveSecurity() {
m_pCryptoHandler.Reset();
m_bSecurityChanged = true;
diff --git a/core/fpdfapi/edit/cpdf_creator.h b/core/fpdfapi/edit/cpdf_creator.h
index 5f39f5c40f..3d85d5e0a4 100644
--- a/core/fpdfapi/edit/cpdf_creator.h
+++ b/core/fpdfapi/edit/cpdf_creator.h
@@ -30,7 +30,7 @@ class CPDF_XRefStream;
class CPDF_Creator {
public:
explicit CPDF_Creator(CPDF_Document* pDoc,
- const CFX_RetainPtr<IFX_WriteStream>& pFile);
+ const CFX_RetainPtr<IFX_WriteStream>& archive);
~CPDF_Creator();
void RemoveSecurity();
@@ -38,10 +38,8 @@ class CPDF_Creator {
int32_t Continue();
bool SetFileVersion(int32_t fileVersion);
- CFX_FileBufferArchive* GetFile() { return &m_File; }
+ IFX_ArchiveStream* GetArchive() { return m_Archive.get(); }
- FX_FILESIZE GetOffset() const { return m_Offset; }
- void IncrementOffset(FX_FILESIZE inc);
uint32_t GetNextObjectNumber() { return ++m_dwLastObjNum; }
uint32_t GetLastObjectNumber() const { return m_dwLastObjNum; }
CPDF_CryptoHandler* GetCryptoHandler() { return m_pCryptoHandler.Get(); }
@@ -102,8 +100,7 @@ class CPDF_Creator {
CPDF_Object* m_pMetadata;
std::unique_ptr<CPDF_XRefStream> m_pXRefStream;
uint32_t m_dwLastObjNum;
- CFX_FileBufferArchive m_File;
- FX_FILESIZE m_Offset;
+ std::unique_ptr<IFX_ArchiveStream> m_Archive;
FX_FILESIZE m_SavedOffset;
int32_t m_iStage;
uint32_t m_dwFlags;
diff --git a/core/fpdfapi/edit/cpdf_objectstream.cpp b/core/fpdfapi/edit/cpdf_objectstream.cpp
index 9b636f2e54..208adacf47 100644
--- a/core/fpdfapi/edit/cpdf_objectstream.cpp
+++ b/core/fpdfapi/edit/cpdf_objectstream.cpp
@@ -51,8 +51,8 @@ FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) {
if (m_Items.empty())
return 0;
- CFX_FileBufferArchive* pFile = pCreator->GetFile();
- FX_FILESIZE ObjOffset = pCreator->GetOffset();
+ IFX_ArchiveStream* archive = pCreator->GetArchive();
+ FX_FILESIZE ObjOffset = archive->CurrentOffset();
if (!m_dwObjNum)
m_dwObjNum = pCreator->GetNextObjectNumber();
@@ -60,29 +60,14 @@ FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) {
for (const auto& pair : m_Items)
tempBuffer << pair.objnum << " " << pair.offset << " ";
- int32_t len = pFile->AppendDWord(m_dwObjNum);
- if (len < 0)
+ if (!archive->WriteDWord(m_dwObjNum) ||
+ !archive->WriteString(" 0 obj\r\n<</Type /ObjStm /N ") ||
+ !archive->WriteDWord(pdfium::CollectionSize<uint32_t>(m_Items)) ||
+ !archive->WriteString("/First ") ||
+ !archive->WriteDWord(static_cast<uint32_t>(tempBuffer.GetLength())) ||
+ !archive->WriteString("/Length ")) {
return -1;
- pCreator->IncrementOffset(len);
-
- len = pFile->AppendString(" 0 obj\r\n<</Type /ObjStm /N ");
- if (len < 0)
- return -1;
- pCreator->IncrementOffset(len);
-
- len = pFile->AppendDWord(pdfium::CollectionSize<uint32_t>(m_Items));
- if (len < 0)
- return -1;
- pCreator->IncrementOffset(len);
-
- if (pFile->AppendString("/First ") < 0)
- return -1;
-
- len = pFile->AppendDWord(static_cast<uint32_t>(tempBuffer.GetLength()));
- if (len < 0 || pFile->AppendString("/Length ") < 0)
- return -1;
- pCreator->IncrementOffset(len + 15);
-
+ }
tempBuffer << m_Buffer;
CPDF_FlateEncoder encoder(tempBuffer.GetBuffer(), tempBuffer.GetLength(),
@@ -90,26 +75,13 @@ FX_FILESIZE CPDF_ObjectStream::End(CPDF_Creator* pCreator) {
CPDF_Encryptor encryptor(pCreator->GetCryptoHandler(), m_dwObjNum,
encoder.GetData(), encoder.GetSize());
- len = pFile->AppendDWord(encryptor.GetSize());
- if (len < 0)
- return -1;
- pCreator->IncrementOffset(len);
-
- if (pFile->AppendString("/Filter /FlateDecode") < 0)
- return -1;
- pCreator->IncrementOffset(20);
-
- len = pFile->AppendString(">>stream\r\n");
- if (len < 0 ||
- pFile->AppendBlock(encryptor.GetData(), encryptor.GetSize()) < 0) {
+ if (!archive->WriteDWord(encryptor.GetSize()) ||
+ !archive->WriteString("/Filter /FlateDecode") ||
+ !archive->WriteString(">>stream\r\n") ||
+ !archive->WriteBlock(encryptor.GetData(), encryptor.GetSize()) ||
+ !archive->WriteString("\r\nendstream\r\nendobj\r\n")) {
return -1;
}
- pCreator->IncrementOffset(len + encryptor.GetSize());
-
- len = pFile->AppendString("\r\nendstream\r\nendobj\r\n");
- if (len < 0)
- return -1;
- pCreator->IncrementOffset(len);
return ObjOffset;
}
diff --git a/core/fpdfapi/edit/cpdf_xrefstream.cpp b/core/fpdfapi/edit/cpdf_xrefstream.cpp
index 7ec05fd8bc..67793b244d 100644
--- a/core/fpdfapi/edit/cpdf_xrefstream.cpp
+++ b/core/fpdfapi/edit/cpdf_xrefstream.cpp
@@ -17,11 +17,9 @@ namespace {
const int32_t kObjectStreamMaxSize = 200;
-int32_t WriteTrailer(CPDF_Document* pDocument,
- CFX_FileBufferArchive* pFile,
- CPDF_Array* pIDArray) {
- FX_FILESIZE offset = 0;
- int32_t len = 0;
+bool WriteTrailer(CPDF_Document* pDocument,
+ IFX_ArchiveStream* archive,
+ CPDF_Array* pIDArray) {
CPDF_Parser* pParser = pDocument->GetParser();
if (pParser) {
CPDF_Dictionary* p = pParser->GetTrailer();
@@ -35,83 +33,56 @@ int32_t WriteTrailer(CPDF_Document* pDocument,
}
if (key == "DecodeParms")
continue;
- if (pFile->AppendString(("/")) < 0)
- return -1;
-
- len = pFile->AppendString(PDF_NameEncode(key).AsStringC());
- if (len < 0)
- return -1;
- offset += len + 1;
+ if (!archive->WriteString(("/")) ||
+ !archive->WriteString(PDF_NameEncode(key).AsStringC())) {
+ return false;
+ }
if (!pValue->IsInline()) {
- if (pFile->AppendString(" ") < 0)
- return -1;
-
- len = pFile->AppendDWord(pValue->GetObjNum());
- if (len < 0 || pFile->AppendString(" 0 R ") < 0)
- return -1;
- offset += len + 6;
- } else if (!pValue->WriteTo(pFile, &offset)) {
- return -1;
+ if (!archive->WriteString(" ") ||
+ !archive->WriteDWord(pValue->GetObjNum()) ||
+ !archive->WriteString(" 0 R ")) {
+ return false;
+ }
+ } else if (!pValue->WriteTo(archive)) {
+ return false;
}
}
if (pIDArray) {
- if (pFile->AppendString(("/ID")) < 0)
- return -1;
- offset += 3;
-
- if (!pIDArray->WriteTo(pFile, &offset))
- return -1;
+ if (!archive->WriteString(("/ID")) || !pIDArray->WriteTo(archive))
+ return false;
}
- return offset;
+ return true;
+ }
+ if (!archive->WriteString("\r\n/Root ") ||
+ !archive->WriteDWord(pDocument->GetRoot()->GetObjNum()) ||
+ !archive->WriteString(" 0 R\r\n")) {
+ return false;
}
- if (pFile->AppendString("\r\n/Root ") < 0)
- return -1;
-
- len = pFile->AppendDWord(pDocument->GetRoot()->GetObjNum());
- if (len < 0 || pFile->AppendString(" 0 R\r\n") < 0)
- return -1;
- offset += len + 14;
if (pDocument->GetInfo()) {
- if (pFile->AppendString("/Info ") < 0)
- return -1;
-
- len = pFile->AppendDWord(pDocument->GetInfo()->GetObjNum());
- if (len < 0 || pFile->AppendString(" 0 R\r\n") < 0)
- return -1;
- offset += len + 12;
+ if (!archive->WriteString("/Info ") ||
+ !archive->WriteDWord(pDocument->GetInfo()->GetObjNum()) ||
+ !archive->WriteString(" 0 R\r\n")) {
+ return false;
+ }
}
if (pIDArray) {
- if (pFile->AppendString(("/ID")) < 0)
- return -1;
- offset += 3;
-
- if (!pIDArray->WriteTo(pFile, &offset))
- return -1;
+ if (!archive->WriteString(("/ID")) || !pIDArray->WriteTo(archive))
+ return false;
}
- return offset;
+ return true;
}
-int32_t WriteEncryptDictObjectReference(uint32_t dwObjNum,
- CFX_FileBufferArchive* pFile) {
- ASSERT(pFile);
-
- FX_FILESIZE offset = 0;
- int32_t len = 0;
- if (pFile->AppendString("/Encrypt") < 0)
- return -1;
- offset += 8;
-
- if (pFile->AppendString(" ") < 0)
- return -1;
+bool WriteEncryptDictObjectReference(uint32_t dwObjNum,
+ IFX_ArchiveStream* archive) {
+ ASSERT(archive);
- len = pFile->AppendDWord(dwObjNum);
- if (len < 0 || pFile->AppendString(" 0 R ") < 0)
- return -1;
- offset += len + 6;
-
- return offset;
+ if (!archive->WriteString("/Encrypt") || !archive->WriteString(" ") ||
+ !archive->WriteDWord(dwObjNum) || !archive->WriteString(" 0 R ")) {
+ return false;
+ }
+ return true;
}
void AppendIndex0(CFX_ByteTextBuf& buffer, bool bFirstObject) {
@@ -255,9 +226,10 @@ bool CPDF_XRefStream::EndObjectStream(CPDF_Creator* pCreator, bool bEOF) {
}
bool CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator, bool bEOF) {
- FX_FILESIZE offset_tmp = pCreator->GetOffset();
uint32_t objnum = pCreator->GetNextObjectNumber();
- CFX_FileBufferArchive* pFile = pCreator->GetFile();
+ IFX_ArchiveStream* archive = pCreator->GetArchive();
+ FX_FILESIZE offset_tmp = archive->CurrentOffset();
+
if (pCreator->IsIncremental()) {
AddObjectNumberToIndexArray(objnum);
} else {
@@ -271,113 +243,67 @@ bool CPDF_XRefStream::GenerateXRefStream(CPDF_Creator* pCreator, bool bEOF) {
AppendIndex1(m_Buffer, offset_tmp);
- int32_t len = pFile->AppendDWord(objnum);
- if (len < 0)
- return false;
- pCreator->IncrementOffset(len);
-
- len = pFile->AppendString(" 0 obj\r\n<</Type /XRef/W[1 4 2]/Index[");
- if (len < 0)
+ if (!archive->WriteDWord(objnum) ||
+ !archive->WriteString(" 0 obj\r\n<</Type /XRef/W[1 4 2]/Index[")) {
return false;
- pCreator->IncrementOffset(len);
+ }
if (!pCreator->IsIncremental()) {
- if (pFile->AppendDWord(0) < 0)
- return false;
-
- len = pFile->AppendString(" ");
- if (len < 0)
+ if (!archive->WriteDWord(0) || !archive->WriteString(" ") ||
+ !archive->WriteDWord(objnum + 1)) {
return false;
- pCreator->IncrementOffset(len + 1);
-
- len = pFile->AppendDWord(objnum + 1);
- if (len < 0)
- return false;
- pCreator->IncrementOffset(len);
+ }
} else {
for (const auto& pair : m_IndexArray) {
- len = pFile->AppendDWord(pair.objnum);
- if (len < 0 || pFile->AppendString(" ") < 0)
+ if (!archive->WriteDWord(pair.objnum) || !archive->WriteString(" ") ||
+ !archive->WriteDWord(pair.count) || !archive->WriteString(" ")) {
return false;
- pCreator->IncrementOffset(len + 1);
-
- len = pFile->AppendDWord(pair.count);
- if (len < 0 || pFile->AppendString(" ") < 0)
- return false;
- pCreator->IncrementOffset(len + 1);
+ }
}
}
- if (pFile->AppendString("]/Size ") < 0)
+ if (!archive->WriteString("]/Size ") || !archive->WriteDWord(objnum + 1))
return false;
- len = pFile->AppendDWord(objnum + 1);
- if (len < 0)
- return false;
- pCreator->IncrementOffset(len + 7);
-
if (m_PrevOffset > 0) {
- if (pFile->AppendString("/Prev ") < 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 (pFile->AppendBlock(offset_buf, offset_len) < 0)
+ if (!archive->WriteBlock(offset_buf, offset_len))
return false;
-
- pCreator->IncrementOffset(offset_len + 6);
}
CPDF_FlateEncoder encoder(m_Buffer.GetBuffer(), m_Buffer.GetLength(), true,
true);
- if (pFile->AppendString("/Filter /FlateDecode") < 0)
+ if (!archive->WriteString("/Filter /FlateDecode") ||
+ !archive->WriteString("/DecodeParms<</Columns 7/Predictor 12>>") ||
+ !archive->WriteString("/Length ") ||
+ !archive->WriteDWord(encoder.GetSize())) {
return false;
- pCreator->IncrementOffset(20);
-
- len = pFile->AppendString("/DecodeParms<</Columns 7/Predictor 12>>");
- if (len < 0)
- return false;
- pCreator->IncrementOffset(len);
-
- if (pFile->AppendString("/Length ") < 0)
- return false;
-
- len = pFile->AppendDWord(encoder.GetSize());
- if (len < 0)
- return false;
- pCreator->IncrementOffset(len + 8);
+ }
if (bEOF) {
- len = WriteTrailer(pCreator->GetDocument(), pFile, pCreator->GetIDArray());
- if (len < 0)
+ if (!WriteTrailer(pCreator->GetDocument(), archive, pCreator->GetIDArray()))
return false;
- pCreator->IncrementOffset(len);
if (CPDF_Dictionary* encryptDict = pCreator->GetEncryptDict()) {
uint32_t dwEncryptObjNum = encryptDict->GetObjNum();
if (dwEncryptObjNum == 0)
dwEncryptObjNum = pCreator->GetEncryptObjectNumber();
- len = WriteEncryptDictObjectReference(dwEncryptObjNum, pFile);
- if (len < 0)
+ if (!WriteEncryptDictObjectReference(dwEncryptObjNum, archive))
return false;
- pCreator->IncrementOffset(len);
}
}
- len = pFile->AppendString(">>stream\r\n");
- if (len < 0)
- return false;
- pCreator->IncrementOffset(len);
-
- if (pFile->AppendBlock(encoder.GetData(), encoder.GetSize()) < 0)
+ if (!archive->WriteString(">>stream\r\n") ||
+ !archive->WriteBlock(encoder.GetData(), encoder.GetSize()) ||
+ !archive->WriteString("\r\nendstream\r\nendobj\r\n")) {
return false;
-
- len = pFile->AppendString("\r\nendstream\r\nendobj\r\n");
- if (len < 0)
- return false;
- pCreator->IncrementOffset(encoder.GetSize() + len);
+ }
m_PrevOffset = offset_tmp;
return true;