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-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp1199
1 files changed, 755 insertions, 444 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index febebacdb6..825a8a26d4 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -37,7 +37,9 @@ struct SearchTagRecord {
};
int32_t GetHeaderOffset(IFX_FileRead* pFile) {
+ // TODO(dsinclair): This is a complicated way of saying %PDF, simplify?
const FX_DWORD tag = FXDWORD_FROM_LSBFIRST(0x46445025);
+
const size_t kBufSize = 4;
uint8_t buf[kBufSize];
int32_t offset = 0;
@@ -163,21 +165,24 @@ void CPDF_Parser::CloseParser() {
}
ReleaseEncryptHandler();
SetEncryptDictionary(nullptr);
+
if (m_bOwnFileRead && m_Syntax.m_pFileAccess) {
m_Syntax.m_pFileAccess->Release();
m_Syntax.m_pFileAccess = nullptr;
}
+
m_ObjectStreamMap.clear();
m_ObjCache.clear();
-
m_SortedOffset.clear();
m_ObjectInfo.clear();
+
int32_t iLen = m_Trailers.GetSize();
for (int32_t i = 0; i < iLen; ++i) {
if (CPDF_Dictionary* trailer = m_Trailers.GetAt(i))
trailer->Release();
}
m_Trailers.RemoveAll();
+
if (m_pLinearized) {
m_pLinearized->Release();
m_pLinearized = nullptr;
@@ -186,6 +191,7 @@ void CPDF_Parser::CloseParser() {
CPDF_Parser::Error CPDF_Parser::StartParse(IFX_FileRead* pFileAccess) {
CloseParser();
+
m_bXRefStream = FALSE;
m_LastXRefOffset = 0;
m_bOwnFileRead = true;
@@ -219,6 +225,7 @@ CPDF_Parser::Error CPDF_Parser::StartParse(IFX_FileRead* pFileAccess) {
if (m_Syntax.SearchWord("startxref", TRUE, FALSE, 4096)) {
m_SortedOffset.insert(m_Syntax.SavePos());
m_Syntax.GetKeyword();
+
bool bNumber;
CFX_ByteString xrefpos_str = m_Syntax.GetNextWord(&bNumber);
if (!bNumber)
@@ -279,10 +286,11 @@ CPDF_Parser::Error CPDF_Parser::StartParse(IFX_FileRead* pFileAccess) {
}
CPDF_Parser::Error CPDF_Parser::SetEncryptHandler() {
ReleaseEncryptHandler();
- SetEncryptDictionary(NULL);
- if (!m_pTrailer) {
+ SetEncryptDictionary(nullptr);
+
+ if (!m_pTrailer)
return FORMAT_ERROR;
- }
+
CPDF_Object* pEncryptObj = m_pTrailer->GetElement("Encrypt");
if (pEncryptObj) {
if (CPDF_Dictionary* pEncryptDict = pEncryptObj->AsDictionary()) {
@@ -293,6 +301,7 @@ CPDF_Parser::Error CPDF_Parser::SetEncryptHandler() {
SetEncryptDictionary(pEncryptObj->GetDict());
}
}
+
if (m_pEncryptDict) {
CFX_ByteString filter = m_pEncryptDict->GetStringBy("Filter");
std::unique_ptr<IPDF_SecurityHandler> pSecurityHandler;
@@ -301,12 +310,12 @@ CPDF_Parser::Error CPDF_Parser::SetEncryptHandler() {
pSecurityHandler.reset(new CPDF_StandardSecurityHandler);
err = PASSWORD_ERROR;
}
- if (!pSecurityHandler) {
+ if (!pSecurityHandler)
return HANDLER_ERROR;
- }
- if (!pSecurityHandler->OnInit(this, m_pEncryptDict)) {
+
+ if (!pSecurityHandler->OnInit(this, m_pEncryptDict))
return err;
- }
+
m_pSecurityHandler = std::move(pSecurityHandler);
std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler(
m_pSecurityHandler->CreateCryptoHandler());
@@ -337,13 +346,12 @@ FX_FILESIZE CPDF_Parser::GetObjectOffset(FX_DWORD objnum) const {
}
FX_BOOL CPDF_Parser::LoadAllCrossRefV4(FX_FILESIZE xrefpos) {
- if (!LoadCrossRefV4(xrefpos, 0, TRUE)) {
+ if (!LoadCrossRefV4(xrefpos, 0, TRUE))
return FALSE;
- }
+
m_pTrailer = LoadTrailerV4();
- if (!m_pTrailer) {
+ if (!m_pTrailer)
return FALSE;
- }
int32_t xrefsize = GetDirectInteger(m_pTrailer, "Size");
if (xrefsize > 0 && xrefsize <= kMaxXRefSize)
@@ -352,6 +360,7 @@ FX_BOOL CPDF_Parser::LoadAllCrossRefV4(FX_FILESIZE xrefpos) {
std::vector<FX_FILESIZE> CrossRefList;
std::vector<FX_FILESIZE> XRefStreamList;
std::set<FX_FILESIZE> seen_xrefpos;
+
CrossRefList.push_back(xrefpos);
XRefStreamList.push_back(GetDirectInteger(m_pTrailer, "XRefStm"));
seen_xrefpos.insert(xrefpos);
@@ -363,43 +372,50 @@ FX_BOOL CPDF_Parser::LoadAllCrossRefV4(FX_FILESIZE xrefpos) {
// Check for circular references.
if (pdfium::ContainsKey(seen_xrefpos, xrefpos))
return FALSE;
+
seen_xrefpos.insert(xrefpos);
+
// SLOW ...
CrossRefList.insert(CrossRefList.begin(), xrefpos);
LoadCrossRefV4(xrefpos, 0, TRUE);
+
std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict(
LoadTrailerV4());
if (!pDict)
return FALSE;
+
xrefpos = GetDirectInteger(pDict.get(), "Prev");
+
// SLOW ...
XRefStreamList.insert(XRefStreamList.begin(),
pDict->GetIntegerBy("XRefStm"));
m_Trailers.Add(pDict.release());
}
+
for (size_t i = 0; i < CrossRefList.size(); ++i) {
if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE))
return FALSE;
}
return TRUE;
}
+
FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV4(FX_FILESIZE xrefpos,
FX_DWORD dwObjCount) {
- if (!LoadLinearizedCrossRefV4(xrefpos, dwObjCount)) {
+ if (!LoadLinearizedCrossRefV4(xrefpos, dwObjCount))
return FALSE;
- }
+
m_pTrailer = LoadTrailerV4();
- if (!m_pTrailer) {
+ if (!m_pTrailer)
return FALSE;
- }
+
int32_t xrefsize = GetDirectInteger(m_pTrailer, "Size");
- if (xrefsize == 0) {
+ if (xrefsize == 0)
return FALSE;
- }
std::vector<FX_FILESIZE> CrossRefList;
std::vector<FX_FILESIZE> XRefStreamList;
std::set<FX_FILESIZE> seen_xrefpos;
+
CrossRefList.push_back(xrefpos);
XRefStreamList.push_back(GetDirectInteger(m_pTrailer, "XRefStm"));
seen_xrefpos.insert(xrefpos);
@@ -409,49 +425,60 @@ FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV4(FX_FILESIZE xrefpos,
// Check for circular references.
if (pdfium::ContainsKey(seen_xrefpos, xrefpos))
return FALSE;
+
seen_xrefpos.insert(xrefpos);
+
// SLOW ...
CrossRefList.insert(CrossRefList.begin(), xrefpos);
LoadCrossRefV4(xrefpos, 0, TRUE);
+
std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict(
LoadTrailerV4());
- if (!pDict) {
+ if (!pDict)
return FALSE;
- }
+
xrefpos = GetDirectInteger(pDict.get(), "Prev");
+
// SLOW ...
XRefStreamList.insert(XRefStreamList.begin(),
pDict->GetIntegerBy("XRefStm"));
m_Trailers.Add(pDict.release());
}
- for (size_t i = 1; i < CrossRefList.size(); ++i)
- if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE)) {
+
+ for (size_t i = 1; i < CrossRefList.size(); ++i) {
+ if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE))
return FALSE;
- }
+ }
return TRUE;
}
+
FX_BOOL CPDF_Parser::LoadLinearizedCrossRefV4(FX_FILESIZE pos,
FX_DWORD dwObjCount) {
FX_FILESIZE dwStartPos = pos - m_Syntax.m_HeaderOffset;
+
m_Syntax.RestorePos(dwStartPos);
m_SortedOffset.insert(pos);
+
FX_DWORD start_objnum = 0;
FX_DWORD count = dwObjCount;
FX_FILESIZE SavedPos = m_Syntax.SavePos();
+
const int32_t recordsize = 20;
std::vector<char> buf(1024 * recordsize + 1);
buf[1024 * recordsize] = '\0';
+
int32_t nBlocks = count / 1024 + 1;
for (int32_t block = 0; block < nBlocks; block++) {
int32_t block_size = block == nBlocks - 1 ? count % 1024 : 1024;
FX_DWORD dwReadSize = block_size * recordsize;
- if ((FX_FILESIZE)(dwStartPos + dwReadSize) > m_Syntax.m_FileLen) {
+ if ((FX_FILESIZE)(dwStartPos + dwReadSize) > m_Syntax.m_FileLen)
return FALSE;
- }
+
if (!m_Syntax.ReadBlock(reinterpret_cast<uint8_t*>(buf.data()),
dwReadSize)) {
return FALSE;
}
+
for (int32_t i = 0; i < block_size; i++) {
FX_DWORD objnum = start_objnum + block * 1024 + i;
char* pEntry = &buf[i * recordsize];
@@ -466,15 +493,16 @@ FX_BOOL CPDF_Parser::LoadLinearizedCrossRefV4(FX_FILESIZE pos,
return FALSE;
}
}
+
m_ObjectInfo[objnum].pos = offset;
int32_t version = FXSYS_atoi(pEntry + 11);
- if (version >= 1) {
+ if (version >= 1)
m_bVersionUpdated = TRUE;
- }
+
m_ObjectInfo[objnum].gennum = version;
- if (m_ObjectInfo[objnum].pos < m_Syntax.m_FileLen) {
+ if (m_ObjectInfo[objnum].pos < m_Syntax.m_FileLen)
m_SortedOffset.insert(m_ObjectInfo[objnum].pos);
- }
+
m_ObjectInfo[objnum].type = 1;
}
}
@@ -505,6 +533,7 @@ bool CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos,
m_Syntax.RestorePos(SavedPos);
break;
}
+
FX_DWORD start_objnum = FXSYS_atoi(word);
if (start_objnum >= kMaxObjectNumber)
return false;
@@ -513,15 +542,18 @@ bool CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos,
m_Syntax.ToNextWord();
SavedPos = m_Syntax.SavePos();
const int32_t recordsize = 20;
+
m_dwXrefStartObjNum = start_objnum;
if (!bSkip) {
std::vector<char> buf(1024 * recordsize + 1);
buf[1024 * recordsize] = '\0';
+
int32_t nBlocks = count / 1024 + 1;
for (int32_t block = 0; block < nBlocks; block++) {
int32_t block_size = block == nBlocks - 1 ? count % 1024 : 1024;
m_Syntax.ReadBlock(reinterpret_cast<uint8_t*>(buf.data()),
block_size * recordsize);
+
for (int32_t i = 0; i < block_size; i++) {
FX_DWORD objnum = start_objnum + block * 1024 + i;
char* pEntry = &buf[i * recordsize];
@@ -536,15 +568,16 @@ bool CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos,
return false;
}
}
+
m_ObjectInfo[objnum].pos = offset;
int32_t version = FXSYS_atoi(pEntry + 11);
- if (version >= 1) {
+ if (version >= 1)
m_bVersionUpdated = TRUE;
- }
+
m_ObjectInfo[objnum].gennum = version;
- if (m_ObjectInfo[objnum].pos < m_Syntax.m_FileLen) {
+ if (m_ObjectInfo[objnum].pos < m_Syntax.m_FileLen)
m_SortedOffset.insert(m_ObjectInfo[objnum].pos);
- }
+
m_ObjectInfo[objnum].type = 1;
}
}
@@ -556,19 +589,18 @@ bool CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos,
}
FX_BOOL CPDF_Parser::LoadAllCrossRefV5(FX_FILESIZE xrefpos) {
- if (!LoadCrossRefV5(&xrefpos, TRUE)) {
+ if (!LoadCrossRefV5(&xrefpos, TRUE))
return FALSE;
- }
+
std::set<FX_FILESIZE> seen_xrefpos;
while (xrefpos) {
seen_xrefpos.insert(xrefpos);
- if (!LoadCrossRefV5(&xrefpos, FALSE)) {
+ if (!LoadCrossRefV5(&xrefpos, FALSE))
return FALSE;
- }
+
// Check for circular references.
- if (pdfium::ContainsKey(seen_xrefpos, xrefpos)) {
+ if (pdfium::ContainsKey(seen_xrefpos, xrefpos))
return FALSE;
- }
}
m_ObjectStreamMap.clear();
m_bXRefStream = TRUE;
@@ -580,7 +612,7 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
m_SortedOffset.clear();
if (m_pTrailer) {
m_pTrailer->Release();
- m_pTrailer = NULL;
+ m_pTrailer = nullptr;
}
ParserState state = ParserState::kDefault;
@@ -589,14 +621,17 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
FX_DWORD objnum = 0;
FX_DWORD gennum = 0;
int32_t depth = 0;
+
const FX_DWORD kBufferSize = 4096;
std::vector<uint8_t> buffer(kBufferSize);
+
FX_FILESIZE pos = m_Syntax.m_HeaderOffset;
FX_FILESIZE start_pos = 0;
FX_FILESIZE start_pos1 = 0;
FX_FILESIZE last_obj = -1;
FX_FILESIZE last_xref = -1;
FX_FILESIZE last_trailer = -1;
+
while (pos < m_Syntax.m_FileLen) {
const FX_FILESIZE saved_pos = pos;
bool bOverFlow = false;
@@ -744,18 +779,19 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
if (m_pTrailer)
m_pTrailer->Release();
m_pTrailer = ToDictionary(pDict->Clone());
- }
}
+ }
}
}
+
FX_FILESIZE offset = 0;
m_Syntax.RestorePos(obj_pos);
offset = m_Syntax.FindTag("obj", 0);
- if (offset == -1) {
+ if (offset == -1)
offset = 0;
- } else {
+ else
offset += 3;
- }
+
FX_FILESIZE nLen = obj_end - obj_pos - offset;
if ((FX_DWORD)nLen > size - i) {
pos = obj_end + m_Syntax.m_HeaderOffset;
@@ -763,24 +799,24 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
} else {
i += (FX_DWORD)nLen;
}
+
if (!m_ObjectInfo.empty() && IsValidObjectNumber(objnum) &&
m_ObjectInfo[objnum].pos) {
if (pObject) {
FX_DWORD oldgen = GetObjectGenNum(objnum);
m_ObjectInfo[objnum].pos = obj_pos;
m_ObjectInfo[objnum].gennum = gennum;
- if (oldgen != gennum) {
+ if (oldgen != gennum)
m_bVersionUpdated = TRUE;
- }
}
} else {
m_ObjectInfo[objnum].pos = obj_pos;
m_ObjectInfo[objnum].type = 1;
m_ObjectInfo[objnum].gennum = gennum;
}
- if (pObject) {
+
+ if (pObject)
pObject->Release();
- }
}
--i;
state = ParserState::kDefault;
@@ -793,6 +829,7 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
if (PDFCharIsWhitespace(byte) || PDFCharIsDelimiter(byte)) {
last_trailer = pos + i - 7;
m_Syntax.RestorePos(pos + i - m_Syntax.m_HeaderOffset);
+
CPDF_Object* pObj = m_Syntax.GetObject(m_pDocument, 0, 0, true);
if (pObj) {
if (!pObj->IsDictionary() && !pObj->AsStream()) {
@@ -821,10 +858,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
m_pTrailer->SetAt(key, pElement->Clone());
}
}
- pObj->Release();
- } else {
- pObj->Release();
}
+ pObj->Release();
} else {
if (pObj->IsStream()) {
m_pTrailer = ToDictionary(pTrailer->Clone());
@@ -832,15 +867,15 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
} else {
m_pTrailer = pTrailer;
}
+
FX_FILESIZE dwSavePos = m_Syntax.SavePos();
CFX_ByteString strWord = m_Syntax.GetKeyword();
if (!strWord.Compare("startxref")) {
bool bNumber;
CFX_ByteString bsOffset =
m_Syntax.GetNextWord(&bNumber);
- if (bNumber) {
+ if (bNumber)
m_LastXRefOffset = FXSYS_atoi(bsOffset);
- }
}
m_Syntax.RestorePos(dwSavePos);
}
@@ -873,22 +908,20 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
break;
case ParserState::kComment:
- if (byte == '\r' || byte == '\n') {
+ if (byte == '\r' || byte == '\n')
state = ParserState::kDefault;
- }
break;
case ParserState::kString:
if (byte == ')') {
- if (depth > 0) {
+ if (depth > 0)
depth--;
- }
} else if (byte == '(') {
depth++;
}
- if (!depth) {
+
+ if (!depth)
state = ParserState::kDefault;
- }
break;
case ParserState::kHexString:
@@ -919,6 +952,7 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
}
break;
}
+
if (bOverFlow) {
size = 0;
break;
@@ -931,11 +965,12 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() {
if (pos == saved_pos)
break;
}
- if (last_xref != -1 && last_xref > last_obj) {
+
+ if (last_xref != -1 && last_xref > last_obj)
last_trailer = last_xref;
- } else if (last_trailer == -1 || last_xref < last_obj) {
+ else if (last_trailer == -1 || last_xref < last_obj)
last_trailer = m_Syntax.m_FileLen;
- }
+
m_SortedOffset.insert(last_trailer - m_Syntax.m_HeaderOffset);
return m_pTrailer && !m_ObjectInfo.empty();
}
@@ -944,6 +979,7 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
CPDF_Object* pObject = ParseIndirectObjectAt(m_pDocument, *pos, 0);
if (!pObject)
return FALSE;
+
if (m_pDocument) {
FX_BOOL bInserted = FALSE;
CPDF_Dictionary* pDict = m_pDocument->GetRoot();
@@ -953,6 +989,7 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
if (pObject->IsStream())
pObject->Release();
}
+
if (!bInserted)
return FALSE;
}
@@ -967,6 +1004,7 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
pStream->Release();
return FALSE;
}
+
if (bMainXRef) {
m_pTrailer = ToDictionary(pStream->GetDict()->Clone());
ShrinkObjectMap(size);
@@ -975,6 +1013,7 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
} else {
m_Trailers.Add(ToDictionary(pStream->GetDict()->Clone()));
}
+
std::vector<std::pair<int32_t, int32_t> > arrIndex;
CPDF_Array* pArray = pStream->GetDict()->GetArrayBy("Index");
if (pArray) {
@@ -982,44 +1021,49 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
for (FX_DWORD i = 0; i < nPairSize; i++) {
CPDF_Object* pStartNumObj = pArray->GetElement(i * 2);
CPDF_Object* pCountObj = pArray->GetElement(i * 2 + 1);
+
if (ToNumber(pStartNumObj) && ToNumber(pCountObj)) {
int nStartNum = pStartNumObj->GetInteger();
int nCount = pCountObj->GetInteger();
- if (nStartNum >= 0 && nCount > 0) {
+ if (nStartNum >= 0 && nCount > 0)
arrIndex.push_back(std::make_pair(nStartNum, nCount));
- }
}
}
}
- if (arrIndex.size() == 0) {
+
+ if (arrIndex.size() == 0)
arrIndex.push_back(std::make_pair(0, size));
- }
+
pArray = pStream->GetDict()->GetArrayBy("W");
if (!pArray) {
pStream->Release();
return FALSE;
}
+
CFX_DWordArray WidthArray;
FX_SAFE_DWORD dwAccWidth = 0;
for (FX_DWORD i = 0; i < pArray->GetCount(); i++) {
WidthArray.Add(pArray->GetIntegerAt(i));
dwAccWidth += WidthArray[i];
}
+
if (!dwAccWidth.IsValid() || WidthArray.GetSize() < 3) {
pStream->Release();
return FALSE;
}
+
FX_DWORD totalWidth = dwAccWidth.ValueOrDie();
CPDF_StreamAcc acc;
acc.LoadAllData(pStream);
+
const uint8_t* pData = acc.GetData();
FX_DWORD dwTotalSize = acc.GetSize();
FX_DWORD segindex = 0;
for (FX_DWORD i = 0; i < arrIndex.size(); i++) {
int32_t startnum = arrIndex[i].first;
- if (startnum < 0) {
+ if (startnum < 0)
continue;
- }
+
m_dwXrefStartObjNum =
pdfium::base::checked_cast<FX_DWORD, int32_t>(startnum);
FX_DWORD count =
@@ -1031,19 +1075,20 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
dwCaculatedSize.ValueOrDie() > dwTotalSize) {
continue;
}
+
const uint8_t* segstart = pData + segindex * totalWidth;
FX_SAFE_DWORD dwMaxObjNum = startnum;
dwMaxObjNum += count;
FX_DWORD dwV5Size = m_ObjectInfo.empty() ? 0 : GetLastObjNum() + 1;
- if (!dwMaxObjNum.IsValid() || dwMaxObjNum.ValueOrDie() > dwV5Size) {
+ if (!dwMaxObjNum.IsValid() || dwMaxObjNum.ValueOrDie() > dwV5Size)
continue;
- }
+
for (FX_DWORD j = 0; j < count; j++) {
int32_t type = 1;
const uint8_t* entrystart = segstart + j * totalWidth;
- if (WidthArray[0]) {
+ if (WidthArray[0])
type = GetVarInt(entrystart, WidthArray[0]);
- }
+
if (GetObjectType(startnum + j) == 255) {
FX_FILESIZE offset =
GetVarInt(entrystart + WidthArray[0], WidthArray[1]);
@@ -1051,9 +1096,10 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
m_SortedOffset.insert(offset);
continue;
}
- if (GetObjectType(startnum + j)) {
+
+ if (GetObjectType(startnum + j))
continue;
- }
+
m_ObjectInfo[startnum + j].type = type;
if (type == 0) {
m_ObjectInfo[startnum + j].pos = 0;
@@ -1077,8 +1123,9 @@ FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef) {
pStream->Release();
return TRUE;
}
+
CPDF_Array* CPDF_Parser::GetIDArray() {
- CPDF_Object* pID = m_pTrailer ? m_pTrailer->GetElement("ID") : NULL;
+ CPDF_Object* pID = m_pTrailer ? m_pTrailer->GetElement("ID") : nullptr;
if (!pID)
return nullptr;
@@ -1088,33 +1135,42 @@ CPDF_Array* CPDF_Parser::GetIDArray() {
}
return ToArray(pID);
}
+
FX_DWORD CPDF_Parser::GetRootObjNum() {
CPDF_Reference* pRef =
ToReference(m_pTrailer ? m_pTrailer->GetElement("Root") : nullptr);
return pRef ? pRef->GetRefObjNum() : 0;
}
+
FX_DWORD CPDF_Parser::GetInfoObjNum() {
CPDF_Reference* pRef =
ToReference(m_pTrailer ? m_pTrailer->GetElement("Info") : nullptr);
return pRef ? pRef->GetRefObjNum() : 0;
}
+
FX_BOOL CPDF_Parser::IsFormStream(FX_DWORD objnum, FX_BOOL& bForm) {
bForm = FALSE;
if (!IsValidObjectNumber(objnum))
return TRUE;
+
if (GetObjectType(objnum) == 0)
return TRUE;
+
if (GetObjectType(objnum) == 2)
return TRUE;
+
FX_FILESIZE pos = m_ObjectInfo[objnum].pos;
auto it = m_SortedOffset.find(pos);
if (it == m_SortedOffset.end())
return TRUE;
+
if (++it == m_SortedOffset.end())
return FALSE;
+
FX_FILESIZE size = *it - pos;
FX_FILESIZE SavedPos = m_Syntax.SavePos();
m_Syntax.RestorePos(pos);
+
const char kFormStream[] = "/Form\0stream";
const CFX_ByteStringC kFormStreamStr(kFormStream, sizeof(kFormStream) - 1);
bForm = m_Syntax.SearchMultiWord(kFormStreamStr, TRUE, size) == 0;
@@ -1211,7 +1267,7 @@ FX_FILESIZE CPDF_Parser::GetObjectSize(FX_DWORD objnum) const {
void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum,
uint8_t*& pBuffer,
FX_DWORD& size) {
- pBuffer = NULL;
+ pBuffer = nullptr;
size = 0;
if (!IsValidObjectNumber(objnum))
return;
@@ -1226,6 +1282,7 @@ void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum,
FX_DWORD totalsize = pObjStream->GetSize();
ScopedFileStream file(
FX_CreateMemoryStream((uint8_t*)pData, (size_t)totalsize, FALSE));
+
CPDF_SyntaxParser syntax;
syntax.InitParser(file.get(), 0);
for (int i = GetStreamNCount(pObjStream); i > 0; --i) {
@@ -1241,6 +1298,7 @@ void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum,
FX_DWORD nextoff = syntax.GetDirectNum();
size = nextoff - thisoff;
}
+
pBuffer = FX_Alloc(uint8_t, size);
FXSYS_memcpy(pBuffer, pData + thisoff + offset, size);
return;
@@ -1252,36 +1310,42 @@ void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum,
return;
FX_FILESIZE pos = m_ObjectInfo[objnum].pos;
- if (pos == 0) {
+ if (pos == 0)
return;
- }
+
FX_FILESIZE SavedPos = m_Syntax.SavePos();
m_Syntax.RestorePos(pos);
+
bool bIsNumber;
CFX_ByteString word = m_Syntax.GetNextWord(&bIsNumber);
if (!bIsNumber) {
m_Syntax.RestorePos(SavedPos);
return;
}
+
FX_DWORD parser_objnum = FXSYS_atoi(word);
if (parser_objnum && parser_objnum != objnum) {
m_Syntax.RestorePos(SavedPos);
return;
}
+
word = m_Syntax.GetNextWord(&bIsNumber);
if (!bIsNumber) {
m_Syntax.RestorePos(SavedPos);
return;
}
+
if (m_Syntax.GetKeyword() != "obj") {
m_Syntax.RestorePos(SavedPos);
return;
}
+
auto it = m_SortedOffset.find(pos);
if (it == m_SortedOffset.end() || ++it == m_SortedOffset.end()) {
m_Syntax.RestorePos(SavedPos);
return;
}
+
FX_FILESIZE nextoff = *it;
FX_BOOL bNextOffValid = FALSE;
if (nextoff != pos) {
@@ -1296,18 +1360,19 @@ void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum,
}
}
}
+
if (!bNextOffValid) {
m_Syntax.RestorePos(pos);
while (1) {
- if (m_Syntax.GetKeyword() == "endobj") {
+ if (m_Syntax.GetKeyword() == "endobj")
break;
- }
- if (m_Syntax.SavePos() == m_Syntax.m_FileLen) {
+
+ if (m_Syntax.SavePos() == m_Syntax.m_FileLen)
break;
- }
}
nextoff = m_Syntax.SavePos();
}
+
size = (FX_DWORD)(nextoff - pos);
pBuffer = FX_Alloc(uint8_t, size);
m_Syntax.RestorePos(pos);
@@ -1325,31 +1390,36 @@ CPDF_Object* CPDF_Parser::ParseIndirectObjectAt(
CFX_ByteString word = m_Syntax.GetNextWord(&bIsNumber);
if (!bIsNumber) {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
FX_FILESIZE objOffset = m_Syntax.SavePos();
objOffset -= word.GetLength();
FX_DWORD parser_objnum = FXSYS_atoi(word);
if (objnum && parser_objnum != objnum) {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
word = m_Syntax.GetNextWord(&bIsNumber);
if (!bIsNumber) {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
FX_DWORD parser_gennum = FXSYS_atoi(word);
if (m_Syntax.GetKeyword() != "obj") {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
CPDF_Object* pObj = m_Syntax.GetObject(pObjList, objnum, parser_gennum, true);
m_Syntax.SavePos();
+
CFX_ByteString bsWord = m_Syntax.GetKeyword();
- if (bsWord == "endobj") {
+ if (bsWord == "endobj")
m_Syntax.SavePos();
- }
+
m_Syntax.RestorePos(SavedPos);
if (pObj) {
if (!objnum)
@@ -1358,6 +1428,7 @@ CPDF_Object* CPDF_Parser::ParseIndirectObjectAt(
}
return pObj;
}
+
CPDF_Object* CPDF_Parser::ParseIndirectObjectAtByStrict(
CPDF_IndirectObjectHolder* pObjList,
FX_FILESIZE pos,
@@ -1365,31 +1436,36 @@ CPDF_Object* CPDF_Parser::ParseIndirectObjectAtByStrict(
FX_FILESIZE* pResultPos) {
FX_FILESIZE SavedPos = m_Syntax.SavePos();
m_Syntax.RestorePos(pos);
+
bool bIsNumber;
CFX_ByteString word = m_Syntax.GetNextWord(&bIsNumber);
if (!bIsNumber) {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
FX_DWORD parser_objnum = FXSYS_atoi(word);
if (objnum && parser_objnum != objnum) {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
word = m_Syntax.GetNextWord(&bIsNumber);
if (!bIsNumber) {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
FX_DWORD gennum = FXSYS_atoi(word);
if (m_Syntax.GetKeyword() != "obj") {
m_Syntax.RestorePos(SavedPos);
- return NULL;
+ return nullptr;
}
+
CPDF_Object* pObj = m_Syntax.GetObjectByStrict(pObjList, objnum, gennum);
- if (pResultPos) {
+ if (pResultPos)
*pResultPos = m_Syntax.m_Pos;
- }
+
m_Syntax.RestorePos(SavedPos);
return pObj;
}
@@ -1406,16 +1482,15 @@ CPDF_Dictionary* CPDF_Parser::LoadTrailerV4() {
}
FX_DWORD CPDF_Parser::GetPermissions(FX_BOOL bCheckRevision) {
- if (!m_pSecurityHandler) {
+ if (!m_pSecurityHandler)
return (FX_DWORD)-1;
- }
+
FX_DWORD dwPermission = m_pSecurityHandler->GetPermissions();
if (m_pEncryptDict && m_pEncryptDict->GetStringBy("Filter") == "Standard") {
dwPermission &= 0xFFFFFFFC;
dwPermission |= 0xFFFFF0C0;
- if (bCheckRevision && m_pEncryptDict->GetIntegerBy("R") == 2) {
+ if (bCheckRevision && m_pEncryptDict->GetIntegerBy("R") == 2)
dwPermission &= 0xFFFFF0FF;
- }
}
return dwPermission;
}
@@ -1424,26 +1499,27 @@ FX_BOOL CPDF_Parser::IsLinearizedFile(IFX_FileRead* pFileAccess,
FX_DWORD offset) {
m_Syntax.InitParser(pFileAccess, offset);
m_Syntax.RestorePos(m_Syntax.m_HeaderOffset + 9);
+
FX_FILESIZE SavedPos = m_Syntax.SavePos();
bool bIsNumber;
CFX_ByteString word = m_Syntax.GetNextWord(&bIsNumber);
- if (!bIsNumber) {
+ if (!bIsNumber)
return FALSE;
- }
+
FX_DWORD objnum = FXSYS_atoi(word);
word = m_Syntax.GetNextWord(&bIsNumber);
- if (!bIsNumber) {
+ if (!bIsNumber)
return FALSE;
- }
+
FX_DWORD gennum = FXSYS_atoi(word);
if (m_Syntax.GetKeyword() != "obj") {
m_Syntax.RestorePos(SavedPos);
return FALSE;
}
+
m_pLinearized = m_Syntax.GetObject(nullptr, objnum, gennum, true);
- if (!m_pLinearized) {
+ if (!m_pLinearized)
return FALSE;
- }
CPDF_Dictionary* pDict = m_pLinearized->GetDict();
if (pDict && pDict->GetElement("Linearized")) {
@@ -1452,12 +1528,12 @@ FX_BOOL CPDF_Parser::IsLinearizedFile(IFX_FileRead* pFileAccess,
CPDF_Object* pLen = pDict->GetElement("L");
if (!pLen) {
m_pLinearized->Release();
- m_pLinearized = NULL;
+ m_pLinearized = nullptr;
return FALSE;
}
- if (pLen->GetInteger() != (int)pFileAccess->GetSize()) {
+
+ if (pLen->GetInteger() != (int)pFileAccess->GetSize())
return FALSE;
- }
if (CPDF_Number* pNo = ToNumber(pDict->GetElement("P")))
m_dwFirstPageNo = pNo->GetInteger();
@@ -1468,76 +1544,81 @@ FX_BOOL CPDF_Parser::IsLinearizedFile(IFX_FileRead* pFileAccess,
return TRUE;
}
m_pLinearized->Release();
- m_pLinearized = NULL;
+ m_pLinearized = nullptr;
return FALSE;
}
+
CPDF_Parser::Error CPDF_Parser::StartAsyncParse(IFX_FileRead* pFileAccess) {
CloseParser();
m_bXRefStream = FALSE;
m_LastXRefOffset = 0;
m_bOwnFileRead = true;
+
int32_t offset = GetHeaderOffset(pFileAccess);
- if (offset == -1) {
+ if (offset == -1)
return FORMAT_ERROR;
- }
+
if (!IsLinearizedFile(pFileAccess, offset)) {
m_Syntax.m_pFileAccess = nullptr;
return StartParse(pFileAccess);
}
+
m_pDocument = new CPDF_Document(this);
FX_FILESIZE dwFirstXRefOffset = m_Syntax.SavePos();
+
FX_BOOL bXRefRebuilt = FALSE;
FX_BOOL bLoadV4 = FALSE;
if (!(bLoadV4 = LoadCrossRefV4(dwFirstXRefOffset, 0, FALSE)) &&
!LoadCrossRefV5(&dwFirstXRefOffset, TRUE)) {
- if (!RebuildCrossRef()) {
+ if (!RebuildCrossRef())
return FORMAT_ERROR;
- }
+
bXRefRebuilt = TRUE;
m_LastXRefOffset = 0;
}
+
if (bLoadV4) {
m_pTrailer = LoadTrailerV4();
- if (!m_pTrailer) {
+ if (!m_pTrailer)
return SUCCESS;
- }
int32_t xrefsize = GetDirectInteger(m_pTrailer, "Size");
if (xrefsize > 0)
ShrinkObjectMap(xrefsize);
}
+
Error eRet = SetEncryptHandler();
- if (eRet != SUCCESS) {
+ if (eRet != SUCCESS)
return eRet;
- }
+
m_pDocument->LoadAsynDoc(m_pLinearized->GetDict());
if (!m_pDocument->GetRoot() || m_pDocument->GetPageCount() == 0) {
- if (bXRefRebuilt) {
+ if (bXRefRebuilt)
return FORMAT_ERROR;
- }
+
ReleaseEncryptHandler();
- if (!RebuildCrossRef()) {
+ if (!RebuildCrossRef())
return FORMAT_ERROR;
- }
+
eRet = SetEncryptHandler();
- if (eRet != SUCCESS) {
+ if (eRet != SUCCESS)
return eRet;
- }
+
m_pDocument->LoadAsynDoc(m_pLinearized->GetDict());
- if (!m_pDocument->GetRoot()) {
+ if (!m_pDocument->GetRoot())
return FORMAT_ERROR;
- }
}
+
if (GetRootObjNum() == 0) {
ReleaseEncryptHandler();
if (!RebuildCrossRef() || GetRootObjNum() == 0)
return FORMAT_ERROR;
eRet = SetEncryptHandler();
- if (eRet != SUCCESS) {
+ if (eRet != SUCCESS)
return eRet;
- }
}
+
if (m_pSecurityHandler && m_pSecurityHandler->IsMetadataEncrypted()) {
if (CPDF_Reference* pMetadata =
ToReference(m_pDocument->GetRoot()->GetElement("Metadata")))
@@ -1547,19 +1628,18 @@ CPDF_Parser::Error CPDF_Parser::StartAsyncParse(IFX_FileRead* pFileAccess) {
}
FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV5(FX_FILESIZE xrefpos) {
- if (!LoadCrossRefV5(&xrefpos, FALSE)) {
+ if (!LoadCrossRefV5(&xrefpos, FALSE))
return FALSE;
- }
+
std::set<FX_FILESIZE> seen_xrefpos;
while (xrefpos) {
seen_xrefpos.insert(xrefpos);
- if (!LoadCrossRefV5(&xrefpos, FALSE)) {
+ if (!LoadCrossRefV5(&xrefpos, FALSE))
return FALSE;
- }
+
// Check for circular references.
- if (pdfium::ContainsKey(seen_xrefpos, xrefpos)) {
+ if (pdfium::ContainsKey(seen_xrefpos, xrefpos))
return FALSE;
- }
}
m_ObjectStreamMap.clear();
m_bXRefStream = TRUE;
@@ -1571,8 +1651,9 @@ CPDF_Parser::Error CPDF_Parser::LoadLinearizedMainXRefTable() {
m_Syntax.m_MetadataObjnum = 0;
if (m_pTrailer) {
m_pTrailer->Release();
- m_pTrailer = NULL;
+ m_pTrailer = nullptr;
}
+
m_Syntax.RestorePos(m_LastXRefOffset - m_Syntax.m_HeaderOffset);
uint8_t ch = 0;
FX_DWORD dwCount = 0;
@@ -1595,6 +1676,7 @@ CPDF_Parser::Error CPDF_Parser::LoadLinearizedMainXRefTable() {
m_Syntax.m_MetadataObjnum = dwSaveMetadataObjnum;
return FORMAT_ERROR;
}
+
m_Syntax.m_MetadataObjnum = dwSaveMetadataObjnum;
return SUCCESS;
}
@@ -1602,13 +1684,11 @@ CPDF_Parser::Error CPDF_Parser::LoadLinearizedMainXRefTable() {
// static
int CPDF_SyntaxParser::s_CurrentRecursionDepth = 0;
-CPDF_SyntaxParser::CPDF_SyntaxParser() {
- m_pFileAccess = NULL;
- m_pFileBuf = NULL;
- m_BufSize = CPDF_ModuleMgr::kFileBufSize;
- m_pFileBuf = NULL;
- m_MetadataObjnum = 0;
-}
+CPDF_SyntaxParser::CPDF_SyntaxParser()
+ : m_MetadataObjnum(0),
+ m_pFileAccess(nullptr),
+ m_pFileBuf(nullptr),
+ m_BufSize(CPDF_ModuleMgr::kFileBufSize) {}
CPDF_SyntaxParser::~CPDF_SyntaxParser() {
FX_Free(m_pFileBuf);
@@ -1622,15 +1702,15 @@ FX_BOOL CPDF_SyntaxParser::GetCharAt(FX_FILESIZE pos, uint8_t& ch) {
FX_BOOL CPDF_SyntaxParser::GetNextChar(uint8_t& ch) {
FX_FILESIZE pos = m_Pos + m_HeaderOffset;
- if (pos >= m_FileLen) {
+ if (pos >= m_FileLen)
return FALSE;
- }
+
if (m_BufOffset >= pos || (FX_FILESIZE)(m_BufOffset + m_BufSize) <= pos) {
FX_FILESIZE read_pos = pos;
FX_DWORD read_size = m_BufSize;
- if ((FX_FILESIZE)read_size > m_FileLen) {
+ if ((FX_FILESIZE)read_size > m_FileLen)
read_size = (FX_DWORD)m_FileLen;
- }
+
if ((FX_FILESIZE)(read_pos + read_size) > m_FileLen) {
if (m_FileLen < (FX_FILESIZE)read_size) {
read_pos = 0;
@@ -1639,27 +1719,29 @@ FX_BOOL CPDF_SyntaxParser::GetNextChar(uint8_t& ch) {
read_pos = m_FileLen - read_size;
}
}
- if (!m_pFileAccess->ReadBlock(m_pFileBuf, read_pos, read_size)) {
+
+ if (!m_pFileAccess->ReadBlock(m_pFileBuf, read_pos, read_size))
return FALSE;
- }
+
m_BufOffset = read_pos;
}
ch = m_pFileBuf[pos - m_BufOffset];
m_Pos++;
return TRUE;
}
+
FX_BOOL CPDF_SyntaxParser::GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch) {
pos += m_HeaderOffset;
- if (pos >= m_FileLen) {
+ if (pos >= m_FileLen)
return FALSE;
- }
+
if (m_BufOffset >= pos || (FX_FILESIZE)(m_BufOffset + m_BufSize) <= pos) {
FX_FILESIZE read_pos;
- if (pos < (FX_FILESIZE)m_BufSize) {
+ if (pos < (FX_FILESIZE)m_BufSize)
read_pos = 0;
- } else {
+ else
read_pos = pos - m_BufSize + 1;
- }
+
FX_DWORD read_size = m_BufSize;
if ((FX_FILESIZE)(read_pos + read_size) > m_FileLen) {
if (m_FileLen < (FX_FILESIZE)read_size) {
@@ -1669,18 +1751,19 @@ FX_BOOL CPDF_SyntaxParser::GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch) {
read_pos = m_FileLen - read_size;
}
}
- if (!m_pFileAccess->ReadBlock(m_pFileBuf, read_pos, read_size)) {
+
+ if (!m_pFileAccess->ReadBlock(m_pFileBuf, read_pos, read_size))
return FALSE;
- }
+
m_BufOffset = read_pos;
}
ch = m_pFileBuf[pos - m_BufOffset];
return TRUE;
}
+
FX_BOOL CPDF_SyntaxParser::ReadBlock(uint8_t* pBuf, FX_DWORD size) {
- if (!m_pFileAccess->ReadBlock(pBuf, m_Pos + m_HeaderOffset, size)) {
+ if (!m_pFileAccess->ReadBlock(pBuf, m_Pos + m_HeaderOffset, size))
return FALSE;
- }
m_Pos += size;
return TRUE;
}
@@ -1689,15 +1772,17 @@ void CPDF_SyntaxParser::GetNextWordInternal(bool* bIsNumber) {
m_WordSize = 0;
if (bIsNumber)
*bIsNumber = true;
+
uint8_t ch;
- if (!GetNextChar(ch)) {
+ if (!GetNextChar(ch))
return;
- }
+
while (1) {
while (PDFCharIsWhitespace(ch)) {
if (!GetNextChar(ch))
return;
}
+
if (ch != '%')
break;
@@ -1712,6 +1797,7 @@ void CPDF_SyntaxParser::GetNextWordInternal(bool* bIsNumber) {
if (PDFCharIsDelimiter(ch)) {
if (bIsNumber)
*bIsNumber = false;
+
m_WordBuffer[m_WordSize++] = ch;
if (ch == '/') {
while (1) {
@@ -1729,6 +1815,7 @@ void CPDF_SyntaxParser::GetNextWordInternal(bool* bIsNumber) {
} else if (ch == '<') {
if (!GetNextChar(ch))
return;
+
if (ch == '<')
m_WordBuffer[m_WordSize++] = ch;
else
@@ -1736,6 +1823,7 @@ void CPDF_SyntaxParser::GetNextWordInternal(bool* bIsNumber) {
} else if (ch == '>') {
if (!GetNextChar(ch))
return;
+
if (ch == '>')
m_WordBuffer[m_WordSize++] = ch;
else
@@ -1748,9 +1836,11 @@ void CPDF_SyntaxParser::GetNextWordInternal(bool* bIsNumber) {
if (m_WordSize < sizeof(m_WordBuffer) - 1)
m_WordBuffer[m_WordSize++] = ch;
- if (!PDFCharIsNumeric(ch))
+ if (!PDFCharIsNumeric(ch)) {
if (bIsNumber)
*bIsNumber = false;
+ }
+
if (!GetNextChar(ch))
return;
@@ -1763,12 +1853,13 @@ void CPDF_SyntaxParser::GetNextWordInternal(bool* bIsNumber) {
CFX_ByteString CPDF_SyntaxParser::ReadString() {
uint8_t ch;
- if (!GetNextChar(ch)) {
+ if (!GetNextChar(ch))
return CFX_ByteString();
- }
+
CFX_ByteTextBuf buf;
int32_t parlevel = 0;
- int32_t status = 0, iEscCode = 0;
+ int32_t status = 0;
+ int32_t iEscCode = 0;
while (1) {
switch (status) {
case 0:
@@ -1793,6 +1884,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() {
status = 2;
break;
}
+
if (ch == 'n') {
buf.AppendChar('\n');
} else if (ch == 'r') {
@@ -1806,8 +1898,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() {
} else if (ch == '\r') {
status = 4;
break;
- } else if (ch == '\n') {
- } else {
+ } else if (ch != '\n') {
buf.AppendChar(ch);
}
status = 0;
@@ -1835,18 +1926,19 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() {
break;
case 4:
status = 0;
- if (ch != '\n') {
+ if (ch != '\n')
continue;
- }
break;
}
- if (!GetNextChar(ch)) {
+
+ if (!GetNextChar(ch))
break;
- }
}
+
GetNextChar(ch);
return buf.GetByteString();
}
+
CFX_ByteString CPDF_SyntaxParser::ReadHexString() {
uint8_t ch;
if (!GetNextChar(ch))
@@ -1878,21 +1970,22 @@ CFX_ByteString CPDF_SyntaxParser::ReadHexString() {
return buf.GetByteString();
}
+
void CPDF_SyntaxParser::ToNextLine() {
uint8_t ch;
while (GetNextChar(ch)) {
- if (ch == '\n') {
+ if (ch == '\n')
break;
- }
+
if (ch == '\r') {
GetNextChar(ch);
- if (ch != '\n') {
+ if (ch != '\n')
--m_Pos;
- }
break;
}
}
}
+
void CPDF_SyntaxParser::ToNextWord() {
uint8_t ch;
if (!GetNextChar(ch))
@@ -1931,15 +2024,15 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjectHolder* pObjList,
FX_DWORD gennum,
FX_BOOL bDecrypt) {
CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
- if (++s_CurrentRecursionDepth > kParserMaxRecursionDepth) {
+ if (++s_CurrentRecursionDepth > kParserMaxRecursionDepth)
return nullptr;
- }
+
FX_FILESIZE SavedPos = m_Pos;
bool bIsNumber;
CFX_ByteString word = GetNextWord(&bIsNumber);
- if (word.GetLength() == 0) {
+ if (word.GetLength() == 0)
return nullptr;
- }
+
if (bIsNumber) {
FX_FILESIZE SavedPos = m_Pos;
CFX_ByteString nextword = GetNextWord(&bIsNumber);
@@ -1953,40 +2046,45 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjectHolder* pObjList,
m_Pos = SavedPos;
return new CPDF_Number(word);
}
- if (word == "true" || word == "false") {
+
+ if (word == "true" || word == "false")
return new CPDF_Boolean(word == "true");
- }
- if (word == "null") {
+
+ if (word == "null")
return new CPDF_Null;
- }
+
if (word == "(") {
CFX_ByteString str = ReadString();
- if (m_pCryptoHandler && bDecrypt) {
+ if (m_pCryptoHandler && bDecrypt)
m_pCryptoHandler->Decrypt(objnum, gennum, str);
- }
return new CPDF_String(str, FALSE);
}
+
if (word == "<") {
CFX_ByteString str = ReadHexString();
- if (m_pCryptoHandler && bDecrypt) {
+ if (m_pCryptoHandler && bDecrypt)
m_pCryptoHandler->Decrypt(objnum, gennum, str);
- }
+
return new CPDF_String(str, TRUE);
}
+
if (word == "[") {
CPDF_Array* pArray = new CPDF_Array;
- while (CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, true)) {
+ while (CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, true))
pArray->Add(pObj);
- }
+
return pArray;
}
+
if (word[0] == '/') {
return new CPDF_Name(
PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)));
}
+
if (word == "<<") {
int32_t nKeys = 0;
FX_FILESIZE dwSignValuePos = 0;
+
std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict(
new CPDF_Dictionary);
while (1) {
@@ -2002,6 +2100,7 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjectHolder* pObjList,
m_Pos = SavedPos;
break;
}
+
if (key[0] != '/')
continue;
@@ -2028,6 +2127,7 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjectHolder* pObjList,
m_Pos = dwSignValuePos;
pDict->SetAt("Contents", GetObject(pObjList, objnum, gennum, false));
}
+
FX_FILESIZE SavedPos = m_Pos;
CFX_ByteString nextword = GetNextWord(nullptr);
if (nextword != "stream") {
@@ -2036,9 +2136,10 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjectHolder* pObjList,
}
return ReadStream(pDict.release(), objnum, gennum);
}
- if (word == ">>") {
+
+ if (word == ">>")
m_Pos = SavedPos;
- }
+
return nullptr;
}
@@ -2047,57 +2148,61 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(
FX_DWORD objnum,
FX_DWORD gennum) {
CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
- if (++s_CurrentRecursionDepth > kParserMaxRecursionDepth) {
+ if (++s_CurrentRecursionDepth > kParserMaxRecursionDepth)
return nullptr;
- }
+
FX_FILESIZE SavedPos = m_Pos;
bool bIsNumber;
CFX_ByteString word = GetNextWord(&bIsNumber);
- if (word.GetLength() == 0) {
+ if (word.GetLength() == 0)
return nullptr;
- }
+
if (bIsNumber) {
FX_FILESIZE SavedPos = m_Pos;
CFX_ByteString nextword = GetNextWord(&bIsNumber);
if (bIsNumber) {
CFX_ByteString nextword2 = GetNextWord(nullptr);
- if (nextword2 == "R") {
+ if (nextword2 == "R")
return new CPDF_Reference(pObjList, FXSYS_atoi(word));
- }
}
m_Pos = SavedPos;
return new CPDF_Number(word);
}
- if (word == "true" || word == "false") {
+
+ if (word == "true" || word == "false")
return new CPDF_Boolean(word == "true");
- }
- if (word == "null") {
+
+ if (word == "null")
return new CPDF_Null;
- }
+
if (word == "(") {
CFX_ByteString str = ReadString();
if (m_pCryptoHandler)
m_pCryptoHandler->Decrypt(objnum, gennum, str);
return new CPDF_String(str, FALSE);
}
+
if (word == "<") {
CFX_ByteString str = ReadHexString();
if (m_pCryptoHandler)
m_pCryptoHandler->Decrypt(objnum, gennum, str);
return new CPDF_String(str, TRUE);
}
+
if (word == "[") {
std::unique_ptr<CPDF_Array, ReleaseDeleter<CPDF_Array>> pArray(
new CPDF_Array);
- while (CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, true)) {
+ while (CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, true))
pArray->Add(pObj);
- }
+
return m_WordBuffer[0] == ']' ? pArray.release() : nullptr;
}
+
if (word[0] == '/') {
return new CPDF_Name(
PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)));
}
+
if (word == "<<") {
std::unique_ptr<CPDF_Dictionary, ReleaseDeleter<CPDF_Dictionary>> pDict(
new CPDF_Dictionary);
@@ -2114,6 +2219,7 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(
m_Pos = SavedPos;
break;
}
+
if (key[0] != '/')
continue;
@@ -2123,14 +2229,17 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(
if (!obj) {
uint8_t ch;
while (GetNextChar(ch) && ch != 0x0A && ch != 0x0D) {
+ continue;
}
return nullptr;
}
+
if (key.GetLength() > 1) {
pDict->SetAt(CFX_ByteStringC(key.c_str() + 1, key.GetLength() - 1),
obj.release());
}
}
+
FX_FILESIZE SavedPos = m_Pos;
CFX_ByteString nextword = GetNextWord(nullptr);
if (nextword != "stream") {
@@ -2140,25 +2249,29 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(
return ReadStream(pDict.release(), objnum, gennum);
}
- if (word == ">>") {
+
+ if (word == ">>")
m_Pos = SavedPos;
- }
+
return nullptr;
}
unsigned int CPDF_SyntaxParser::ReadEOLMarkers(FX_FILESIZE pos) {
unsigned char byte1 = 0;
unsigned char byte2 = 0;
+
GetCharAt(pos, byte1);
GetCharAt(pos + 1, byte2);
- unsigned int markers = 0;
- if (byte1 == '\r' && byte2 == '\n') {
- markers = 2;
- } else if (byte1 == '\r' || byte1 == '\n') {
- markers = 1;
- }
- return markers;
+
+ if (byte1 == '\r' && byte2 == '\n')
+ return 2;
+
+ if (byte1 == '\r' || byte1 == '\n')
+ return 1;
+
+ return 0;
}
+
CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
FX_DWORD objnum,
FX_DWORD gennum) {
@@ -2174,8 +2287,10 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
// Locate the start of stream.
ToNextLine();
FX_FILESIZE streamStartPos = m_Pos;
+
const CFX_ByteStringC kEndStreamStr("endstream");
const CFX_ByteStringC kEndObjStr("endobj");
+
CPDF_CryptoHandler* pCryptoHandler =
objnum == (FX_DWORD)m_MetadataObjnum ? nullptr : m_pCryptoHandler.get();
if (!pCryptoHandler) {
@@ -2183,9 +2298,9 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
if (len >= 0) {
pdfium::base::CheckedNumeric<FX_FILESIZE> pos = m_Pos;
pos += len;
- if (pos.IsValid() && pos.ValueOrDie() < m_FileLen) {
+ if (pos.IsValid() && pos.ValueOrDie() < m_FileLen)
m_Pos = pos.ValueOrDie();
- }
+
m_Pos += ReadEOLMarkers(m_Pos);
FXSYS_memset(m_WordBuffer, 0, kEndStreamStr.GetLength() + 1);
GetNextWordInternal(nullptr);
@@ -2197,6 +2312,7 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
bSearchForKeyword = FALSE;
}
}
+
if (bSearchForKeyword) {
// If len is not available, len needs to be calculated
// by searching the keywords "endstream" or "endobj".
@@ -2204,37 +2320,42 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
FX_FILESIZE endStreamOffset = 0;
while (endStreamOffset >= 0) {
endStreamOffset = FindTag(kEndStreamStr, 0);
- if (endStreamOffset < 0) {
- // Can't find any "endstream".
+
+ // Can't find "endstream".
+ if (endStreamOffset < 0)
break;
- }
+
+ // Stop searching when "endstream" is found.
if (IsWholeWord(m_Pos - kEndStreamStr.GetLength(), m_FileLen,
kEndStreamStr, TRUE)) {
- // Stop searching when the keyword "endstream" is found.
endStreamOffset = m_Pos - streamStartPos - kEndStreamStr.GetLength();
break;
}
}
+
m_Pos = streamStartPos;
FX_FILESIZE endObjOffset = 0;
while (endObjOffset >= 0) {
endObjOffset = FindTag(kEndObjStr, 0);
- if (endObjOffset < 0) {
- // Can't find any "endobj".
+
+ // Can't find "endobj".
+ if (endObjOffset < 0)
break;
- }
+
+ // Stop searching when "endobj" is found.
if (IsWholeWord(m_Pos - kEndObjStr.GetLength(), m_FileLen, kEndObjStr,
TRUE)) {
- // Stop searching when the keyword "endobj" is found.
endObjOffset = m_Pos - streamStartPos - kEndObjStr.GetLength();
break;
}
}
+
+ // Can't find "endstream" or "endobj".
if (endStreamOffset < 0 && endObjOffset < 0) {
- // Can't find "endstream" or "endobj".
pDict->Release();
return nullptr;
}
+
if (endStreamOffset < 0 && endObjOffset >= 0) {
// Correct the position of end stream.
endStreamOffset = endObjOffset;
@@ -2244,6 +2365,7 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
} else if (endStreamOffset > endObjOffset) {
endStreamOffset = endObjOffset;
}
+
len = endStreamOffset;
int numMarkers = ReadEOLMarkers(streamStartPos + endStreamOffset - 2);
if (numMarkers == 2) {
@@ -2254,6 +2376,7 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
len -= 1;
}
}
+
if (len < 0) {
pDict->Release();
return nullptr;
@@ -2262,10 +2385,12 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
}
m_Pos = streamStartPos;
}
+
if (len < 0) {
pDict->Release();
return nullptr;
}
+
uint8_t* pData = nullptr;
if (len > 0) {
pData = FX_Alloc(uint8_t, len);
@@ -2273,19 +2398,24 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
if (pCryptoHandler) {
CFX_BinaryBuf dest_buf;
dest_buf.EstimateSize(pCryptoHandler->DecryptGetSize(len));
+
void* context = pCryptoHandler->DecryptStart(objnum, gennum);
pCryptoHandler->DecryptStream(context, pData, len, dest_buf);
pCryptoHandler->DecryptFinish(context, dest_buf);
+
FX_Free(pData);
pData = dest_buf.GetBuffer();
len = dest_buf.GetSize();
dest_buf.DetachBuffer();
}
}
+
CPDF_Stream* pStream = new CPDF_Stream(pData, len, pDict);
streamStartPos = m_Pos;
FXSYS_memset(m_WordBuffer, 0, kEndObjStr.GetLength() + 1);
+
GetNextWordInternal(nullptr);
+
int numMarkers = ReadEOLMarkers(m_Pos);
if (m_WordSize == kEndObjStr.GetLength() && numMarkers != 0 &&
FXSYS_memcmp(m_WordBuffer, kEndObjStr.GetPtr(), kEndObjStr.GetLength()) ==
@@ -2294,9 +2424,11 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
}
return pStream;
}
+
void CPDF_SyntaxParser::InitParser(IFX_FileRead* pFileAccess,
FX_DWORD HeaderOffset) {
FX_Free(m_pFileBuf);
+
m_pFileBuf = FX_Alloc(uint8_t, m_BufSize);
m_HeaderOffset = HeaderOffset;
m_FileLen = pFileAccess->GetSize();
@@ -2307,6 +2439,7 @@ void CPDF_SyntaxParser::InitParser(IFX_FileRead* pFileAccess,
m_pFileBuf, 0,
(size_t)((FX_FILESIZE)m_BufSize > m_FileLen ? m_FileLen : m_BufSize));
}
+
int32_t CPDF_SyntaxParser::GetDirectNum() {
bool bIsNumber;
GetNextWordInternal(&bIsNumber);
@@ -2322,9 +2455,11 @@ bool CPDF_SyntaxParser::IsWholeWord(FX_FILESIZE startpos,
const CFX_ByteStringC& tag,
FX_BOOL checkKeyword) {
const FX_DWORD taglen = tag.GetLength();
+
bool bCheckLeft = !PDFCharIsDelimiter(tag[0]) && !PDFCharIsWhitespace(tag[0]);
bool bCheckRight = !PDFCharIsDelimiter(tag[taglen - 1]) &&
!PDFCharIsWhitespace(tag[taglen - 1]);
+
uint8_t ch;
if (bCheckRight && startpos + (int32_t)taglen <= limit &&
GetCharAt(startpos + (int32_t)taglen, ch)) {
@@ -2343,41 +2478,39 @@ bool CPDF_SyntaxParser::IsWholeWord(FX_FILESIZE startpos,
return true;
}
+// TODO(dsinclair): Split into a SearchWordForward and SearchWordBackwards
+// and drop the bool.
FX_BOOL CPDF_SyntaxParser::SearchWord(const CFX_ByteStringC& tag,
FX_BOOL bWholeWord,
FX_BOOL bForward,
FX_FILESIZE limit) {
int32_t taglen = tag.GetLength();
- if (taglen == 0) {
+ if (taglen == 0)
return FALSE;
- }
+
FX_FILESIZE pos = m_Pos;
int32_t offset = 0;
- if (!bForward) {
+ if (!bForward)
offset = taglen - 1;
- }
+
const uint8_t* tag_data = tag.GetPtr();
uint8_t byte;
while (1) {
if (bForward) {
- if (limit) {
- if (pos >= m_Pos + limit) {
- return FALSE;
- }
- }
- if (!GetCharAt(pos, byte)) {
+ if (limit && pos >= m_Pos + limit)
return FALSE;
- }
+
+ if (!GetCharAt(pos, byte))
+ return FALSE;
+
} else {
- if (limit) {
- if (pos <= m_Pos - limit) {
- return FALSE;
- }
- }
- if (!GetCharAtBackward(pos, byte)) {
+ if (limit && pos <= m_Pos - limit)
+ return FALSE;
+
+ if (!GetCharAtBackward(pos, byte))
return FALSE;
- }
}
+
if (byte == tag_data[offset]) {
if (bForward) {
offset++;
@@ -2392,12 +2525,14 @@ FX_BOOL CPDF_SyntaxParser::SearchWord(const CFX_ByteStringC& tag,
continue;
}
}
+
FX_FILESIZE startpos = bForward ? pos - taglen + 1 : pos;
if (!bWholeWord || IsWholeWord(startpos, limit, tag, FALSE)) {
m_Pos = startpos;
return TRUE;
}
}
+
if (bForward) {
offset = byte == tag_data[0] ? 1 : 0;
pos++;
@@ -2405,10 +2540,11 @@ FX_BOOL CPDF_SyntaxParser::SearchWord(const CFX_ByteStringC& tag,
offset = byte == tag_data[taglen - 1] ? taglen - 2 : taglen - 1;
pos--;
}
- if (pos < 0) {
+
+ if (pos < 0)
return FALSE;
- }
}
+
return FALSE;
}
@@ -2417,9 +2553,8 @@ int32_t CPDF_SyntaxParser::SearchMultiWord(const CFX_ByteStringC& tags,
FX_FILESIZE limit) {
int32_t ntags = 1;
for (int i = 0; i < tags.GetLength(); ++i) {
- if (tags[i] == 0) {
+ if (tags[i] == 0)
++ntags;
- }
}
std::vector<SearchTagRecord> patterns(ntags);
@@ -2473,22 +2608,22 @@ FX_FILESIZE CPDF_SyntaxParser::FindTag(const CFX_ByteStringC& tag,
int32_t match = 0;
limit += m_Pos;
FX_FILESIZE startpos = m_Pos;
+
while (1) {
uint8_t ch;
- if (!GetNextChar(ch)) {
+ if (!GetNextChar(ch))
return -1;
- }
+
if (ch == tag[match]) {
match++;
- if (match == taglen) {
+ if (match == taglen)
return m_Pos - startpos - taglen;
- }
} else {
match = ch == tag[0] ? 1 : 0;
}
- if (limit && m_Pos == limit) {
+
+ if (limit && m_Pos == limit)
return -1;
- }
}
return -1;
}
@@ -2558,7 +2693,7 @@ class CPDF_DataAvail final : public IPDF_DataAvail {
CPDF_Object* ParseIndirectObjectAt(
FX_FILESIZE pos,
FX_DWORD objnum,
- CPDF_IndirectObjectHolder* pObjList = NULL);
+ CPDF_IndirectObjectHolder* pObjList = nullptr);
CPDF_Object* GetObject(FX_DWORD objnum,
IFX_DownloadHints* pHints,
FX_BOOL* pExistInFile);
@@ -2714,24 +2849,24 @@ CPDF_DataAvail::CPDF_DataAvail(IFX_FileAvail* pFileAvail,
m_bSupportHintTable = bSupportHintTable;
}
CPDF_DataAvail::~CPDF_DataAvail() {
- if (m_pLinearized) {
+ if (m_pLinearized)
m_pLinearized->Release();
- }
- if (m_pRoot) {
+
+ if (m_pRoot)
m_pRoot->Release();
- }
- if (m_pTrailer) {
+
+ if (m_pTrailer)
m_pTrailer->Release();
- }
int iSize = m_arrayAcroforms.GetSize();
- for (int i = 0; i < iSize; ++i) {
+ for (int i = 0; i < iSize; ++i)
m_arrayAcroforms.GetAt(i)->Release();
- }
}
+
void CPDF_DataAvail::SetDocument(CPDF_Document* pDoc) {
m_pDocument = pDoc;
}
+
FX_DWORD CPDF_DataAvail::GetObjectSize(FX_DWORD objnum, FX_FILESIZE& offset) {
CPDF_Parser* pParser = m_pDocument->GetParser();
if (!pParser || !pParser->IsValidObjectNumber(objnum))
@@ -2756,14 +2891,15 @@ FX_DWORD CPDF_DataAvail::GetObjectSize(FX_DWORD objnum, FX_FILESIZE& offset) {
}
return *it - offset;
}
+
FX_BOOL CPDF_DataAvail::IsObjectsAvail(
CFX_ArrayTemplate<CPDF_Object*>& obj_array,
FX_BOOL bParsePage,
IFX_DownloadHints* pHints,
CFX_ArrayTemplate<CPDF_Object*>& ret_array) {
- if (!obj_array.GetSize()) {
+ if (!obj_array.GetSize())
return TRUE;
- }
+
FX_DWORD count = 0;
CFX_ArrayTemplate<CPDF_Object*> new_obj_array;
int32_t i = 0;
@@ -2776,33 +2912,32 @@ FX_BOOL CPDF_DataAvail::IsObjectsAvail(
switch (type) {
case CPDF_Object::ARRAY: {
CPDF_Array* pArray = pObj->GetArray();
- for (FX_DWORD k = 0; k < pArray->GetCount(); k++) {
+ for (FX_DWORD k = 0; k < pArray->GetCount(); ++k)
new_obj_array.Add(pArray->GetElement(k));
- }
} break;
case CPDF_Object::STREAM:
pObj = pObj->GetDict();
case CPDF_Object::DICTIONARY: {
CPDF_Dictionary* pDict = pObj->GetDict();
- if (pDict && pDict->GetStringBy("Type") == "Page" && !bParsePage) {
+ if (pDict && pDict->GetStringBy("Type") == "Page" && !bParsePage)
continue;
- }
+
for (const auto& it : *pDict) {
const CFX_ByteString& key = it.first;
CPDF_Object* value = it.second;
- if (key != "Parent") {
+ if (key != "Parent")
new_obj_array.Add(value);
- }
}
} break;
case CPDF_Object::REFERENCE: {
CPDF_Reference* pRef = pObj->AsReference();
FX_DWORD dwNum = pRef->GetRefObjNum();
+
FX_FILESIZE offset;
FX_DWORD size = GetObjectSize(dwNum, offset);
- if (size == 0 || offset < 0 || offset >= m_dwFileLen) {
+ if (size == 0 || offset < 0 || offset >= m_dwFileLen)
break;
- }
+
if (!IsDataAvail(offset, size, pHints)) {
ret_array.Add(pObj);
count++;
@@ -2810,13 +2945,13 @@ FX_BOOL CPDF_DataAvail::IsObjectsAvail(
m_ObjectSet.insert(dwNum);
CPDF_Object* pReferred =
m_pDocument->GetIndirectObject(pRef->GetRefObjNum());
- if (pReferred) {
+ if (pReferred)
new_obj_array.Add(pReferred);
- }
}
} break;
}
}
+
if (count > 0) {
int32_t iSize = new_obj_array.GetSize();
for (i = 0; i < iSize; ++i) {
@@ -2831,6 +2966,7 @@ FX_BOOL CPDF_DataAvail::IsObjectsAvail(
}
return FALSE;
}
+
obj_array.RemoveAll();
obj_array.Append(new_obj_array);
return IsObjectsAvail(obj_array, FALSE, pHints, ret_array);
@@ -2840,15 +2976,15 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsDocAvail(
IFX_DownloadHints* pHints) {
if (!m_dwFileLen && m_pFileRead) {
m_dwFileLen = (FX_DWORD)m_pFileRead->GetSize();
- if (!m_dwFileLen) {
+ if (!m_dwFileLen)
return DataError;
- }
}
+
while (!m_bDocAvail) {
- if (!CheckDocStatus(pHints)) {
+ if (!CheckDocStatus(pHints))
return DataNotAvailable;
- }
}
+
return DataAvailable;
}
@@ -2859,11 +2995,11 @@ FX_BOOL CPDF_DataAvail::CheckAcroFormSubObject(IFX_DownloadHints* pHints) {
CFX_ArrayTemplate<CPDF_Object*> obj_array;
obj_array.Append(m_arrayAcroforms);
FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
- if (bRet) {
+ if (bRet)
m_objs_array.RemoveAll();
- }
return bRet;
}
+
CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
if (bRet) {
@@ -2878,6 +3014,7 @@ FX_BOOL CPDF_DataAvail::CheckAcroFormSubObject(IFX_DownloadHints* pHints) {
}
return bRet;
}
+
FX_BOOL CPDF_DataAvail::CheckAcroForm(IFX_DownloadHints* pHints) {
FX_BOOL bExist = FALSE;
m_pAcroForm = GetObject(m_dwAcroFormObjNum, pHints, &bExist);
@@ -2885,6 +3022,7 @@ FX_BOOL CPDF_DataAvail::CheckAcroForm(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_PAGETREE;
return TRUE;
}
+
if (!m_pAcroForm) {
if (m_docStatus == PDF_DATAAVAIL_ERROR) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
@@ -2892,10 +3030,12 @@ FX_BOOL CPDF_DataAvail::CheckAcroForm(IFX_DownloadHints* pHints) {
}
return FALSE;
}
+
m_arrayAcroforms.Add(m_pAcroForm);
m_docStatus = PDF_DATAAVAIL_PAGETREE;
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckDocStatus(IFX_DownloadHints* pHints) {
switch (m_docStatus) {
case PDF_DATAAVAIL_HEADER:
@@ -2928,14 +3068,12 @@ FX_BOOL CPDF_DataAvail::CheckDocStatus(IFX_DownloadHints* pHints) {
case PDF_DATAAVAIL_ACROFORM:
return CheckAcroForm(pHints);
case PDF_DATAAVAIL_PAGETREE:
- if (m_bTotalLoadPageTree) {
+ if (m_bTotalLoadPageTree)
return CheckPages(pHints);
- }
return LoadDocPages(pHints);
case PDF_DATAAVAIL_PAGE:
- if (m_bTotalLoadPageTree) {
+ if (m_bTotalLoadPageTree)
return CheckPage(pHints);
- }
m_docStatus = PDF_DATAAVAIL_PAGE_LATERLOAD;
return TRUE;
case PDF_DATAAVAIL_ERROR:
@@ -2947,6 +3085,7 @@ FX_BOOL CPDF_DataAvail::CheckDocStatus(IFX_DownloadHints* pHints) {
return TRUE;
}
}
+
FX_BOOL CPDF_DataAvail::CheckPageStatus(IFX_DownloadHints* pHints) {
switch (m_docStatus) {
case PDF_DATAAVAIL_PAGETREE:
@@ -2961,14 +3100,17 @@ FX_BOOL CPDF_DataAvail::CheckPageStatus(IFX_DownloadHints* pHints) {
return TRUE;
}
}
+
FX_BOOL CPDF_DataAvail::LoadAllFile(IFX_DownloadHints* pHints) {
if (m_pFileAvail->IsDataAvail(0, (FX_DWORD)m_dwFileLen)) {
m_docStatus = PDF_DATAAVAIL_DONE;
return TRUE;
}
+
pHints->AddSegment(0, (FX_DWORD)m_dwFileLen);
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::LoadAllXref(IFX_DownloadHints* pHints) {
m_parser.m_Syntax.InitParser(m_pFileRead, (FX_DWORD)m_dwHeaderOffset);
m_parser.m_bOwnFileRead = false;
@@ -2977,12 +3119,14 @@ FX_BOOL CPDF_DataAvail::LoadAllXref(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
return FALSE;
}
+
m_dwRootObjNum = m_parser.GetRootObjNum();
m_dwInfoObjNum = m_parser.GetInfoObjNum();
m_pCurrentParser = &m_parser;
m_docStatus = PDF_DATAAVAIL_ROOT;
return TRUE;
}
+
CPDF_Object* CPDF_DataAvail::GetObject(FX_DWORD objnum,
IFX_DownloadHints* pHints,
FX_BOOL* pExistInFile) {
@@ -2990,6 +3134,7 @@ CPDF_Object* CPDF_DataAvail::GetObject(FX_DWORD objnum,
FX_DWORD size = 0;
FX_FILESIZE offset = 0;
CPDF_Parser* pParser = nullptr;
+
if (pExistInFile)
*pExistInFile = TRUE;
@@ -3001,15 +3146,16 @@ CPDF_Object* CPDF_DataAvail::GetObject(FX_DWORD objnum,
offset = m_parser.GetObjectOffset(objnum);
pParser = &m_parser;
}
- if (!IsDataAvail(offset, size, pHints)) {
+
+ if (!IsDataAvail(offset, size, pHints))
return nullptr;
- }
- if (pParser) {
+
+ if (pParser)
pRet = pParser->ParseIndirectObject(nullptr, objnum);
- }
- if (!pRet && pExistInFile) {
+
+ if (!pRet && pExistInFile)
*pExistInFile = FALSE;
- }
+
return pRet;
}
@@ -3017,33 +3163,31 @@ FX_BOOL CPDF_DataAvail::CheckInfo(IFX_DownloadHints* pHints) {
FX_BOOL bExist = FALSE;
CPDF_Object* pInfo = GetObject(m_dwInfoObjNum, pHints, &bExist);
if (!bExist) {
- if (m_bHaveAcroForm) {
- m_docStatus = PDF_DATAAVAIL_ACROFORM;
- } else {
- m_docStatus = PDF_DATAAVAIL_PAGETREE;
- }
+ m_docStatus =
+ (m_bHaveAcroForm ? PDF_DATAAVAIL_ACROFORM : PDF_DATAAVAIL_PAGETREE);
return TRUE;
}
+
if (!pInfo) {
if (m_docStatus == PDF_DATAAVAIL_ERROR) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
return TRUE;
}
- if (m_Pos == m_dwFileLen) {
+
+ if (m_Pos == m_dwFileLen)
m_docStatus = PDF_DATAAVAIL_ERROR;
- }
return FALSE;
}
- if (pInfo) {
+
+ if (pInfo)
pInfo->Release();
- }
- if (m_bHaveAcroForm) {
- m_docStatus = PDF_DATAAVAIL_ACROFORM;
- } else {
- m_docStatus = PDF_DATAAVAIL_PAGETREE;
- }
+
+ m_docStatus =
+ (m_bHaveAcroForm ? PDF_DATAAVAIL_ACROFORM : PDF_DATAAVAIL_PAGETREE);
+
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckRoot(IFX_DownloadHints* pHints) {
FX_BOOL bExist = FALSE;
m_pRoot = GetObject(m_dwRootObjNum, pHints, &bExist);
@@ -3051,6 +3195,7 @@ FX_BOOL CPDF_DataAvail::CheckRoot(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
return TRUE;
}
+
if (!m_pRoot) {
if (m_docStatus == PDF_DATAAVAIL_ERROR) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
@@ -3058,11 +3203,13 @@ FX_BOOL CPDF_DataAvail::CheckRoot(IFX_DownloadHints* pHints) {
}
return FALSE;
}
+
CPDF_Dictionary* pDict = m_pRoot->GetDict();
if (!pDict) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
CPDF_Reference* pRef = ToReference(pDict->GetElement("Pages"));
if (!pRef) {
m_docStatus = PDF_DATAAVAIL_ERROR;
@@ -3085,6 +3232,7 @@ FX_BOOL CPDF_DataAvail::CheckRoot(IFX_DownloadHints* pHints) {
}
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::PreparePageItem() {
CPDF_Dictionary* pRoot = m_pDocument->GetRoot();
CPDF_Reference* pRef =
@@ -3099,12 +3247,15 @@ FX_BOOL CPDF_DataAvail::PreparePageItem() {
m_docStatus = PDF_DATAAVAIL_PAGETREE;
return TRUE;
}
+
bool CPDF_DataAvail::IsFirstCheck(int iPage) {
return m_pageMapCheckState.insert(iPage).second;
}
+
void CPDF_DataAvail::ResetFirstCheck(int iPage) {
m_pageMapCheckState.erase(iPage);
}
+
FX_BOOL CPDF_DataAvail::CheckPage(IFX_DownloadHints* pHints) {
FX_DWORD iPageObjs = m_PageObjList.GetSize();
CFX_DWordArray UnavailObjList;
@@ -3113,11 +3264,11 @@ FX_BOOL CPDF_DataAvail::CheckPage(IFX_DownloadHints* pHints) {
FX_BOOL bExist = FALSE;
CPDF_Object* pObj = GetObject(dwPageObjNum, pHints, &bExist);
if (!pObj) {
- if (bExist) {
+ if (bExist)
UnavailObjList.Add(dwPageObjNum);
- }
continue;
}
+
if (pObj->IsArray()) {
CPDF_Array* pArray = pObj->GetArray();
if (pArray) {
@@ -3128,10 +3279,12 @@ FX_BOOL CPDF_DataAvail::CheckPage(IFX_DownloadHints* pHints) {
}
}
}
+
if (!pObj->IsDictionary()) {
pObj->Release();
continue;
}
+
CFX_ByteString type = pObj->GetDict()->GetStringBy("Type");
if (type == "Pages") {
m_PagesArray.Add(pObj);
@@ -3139,11 +3292,13 @@ FX_BOOL CPDF_DataAvail::CheckPage(IFX_DownloadHints* pHints) {
}
pObj->Release();
}
+
m_PageObjList.RemoveAll();
if (UnavailObjList.GetSize()) {
m_PageObjList.Append(UnavailObjList);
return FALSE;
}
+
FX_DWORD iPages = m_PagesArray.GetSize();
for (FX_DWORD i = 0; i < iPages; i++) {
CPDF_Object* pPages = m_PagesArray.GetAt(i);
@@ -3157,27 +3312,30 @@ FX_BOOL CPDF_DataAvail::CheckPage(IFX_DownloadHints* pHints) {
pPages->Release();
}
m_PagesArray.RemoveAll();
+
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
pPages->Release();
}
+
m_PagesArray.RemoveAll();
- if (!m_PageObjList.GetSize()) {
+ if (!m_PageObjList.GetSize())
m_docStatus = PDF_DATAAVAIL_DONE;
- }
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages) {
if (!pParser) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
CPDF_Dictionary* pDict = pPages->GetDict();
CPDF_Object* pKids = pDict ? pDict->GetElement("Kids") : NULL;
- if (!pKids) {
+ if (!pKids)
return TRUE;
- }
+
switch (pKids->GetType()) {
case CPDF_Object::REFERENCE:
m_PageObjList.Add(pKids->AsReference()->GetRefObjNum());
@@ -3195,6 +3353,7 @@ FX_BOOL CPDF_DataAvail::GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages) {
}
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckPages(IFX_DownloadHints* pHints) {
FX_BOOL bExist = FALSE;
CPDF_Object* pPages = GetObject(m_PagesObjNum, pHints, &bExist);
@@ -3202,6 +3361,7 @@ FX_BOOL CPDF_DataAvail::CheckPages(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
return TRUE;
}
+
if (!pPages) {
if (m_docStatus == PDF_DATAAVAIL_ERROR) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
@@ -3209,36 +3369,41 @@ FX_BOOL CPDF_DataAvail::CheckPages(IFX_DownloadHints* pHints) {
}
return FALSE;
}
+
if (!GetPageKids(m_pCurrentParser, pPages)) {
pPages->Release();
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
pPages->Release();
m_docStatus = PDF_DATAAVAIL_PAGE;
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckHeader(IFX_DownloadHints* pHints) {
FX_DWORD req_size = 1024;
- if ((FX_FILESIZE)req_size > m_dwFileLen) {
+ if ((FX_FILESIZE)req_size > m_dwFileLen)
req_size = (FX_DWORD)m_dwFileLen;
- }
+
if (m_pFileAvail->IsDataAvail(0, req_size)) {
uint8_t buffer[1024];
m_pFileRead->ReadBlock(buffer, 0, req_size);
+
if (IsLinearizedFile(buffer, req_size)) {
m_docStatus = PDF_DATAAVAIL_FIRSTPAGE;
} else {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR)
return FALSE;
- }
m_docStatus = PDF_DATAAVAIL_END;
}
return TRUE;
}
+
pHints->AddSegment(0, req_size);
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::CheckFirstPage(IFX_DownloadHints* pHints) {
CPDF_Dictionary* pDict = m_pLinearized->GetDict();
CPDF_Object* pEndOffSet = pDict ? pDict->GetElement("E") : NULL;
@@ -3246,23 +3411,26 @@ FX_BOOL CPDF_DataAvail::CheckFirstPage(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
CPDF_Object* pXRefOffset = pDict ? pDict->GetElement("T") : NULL;
if (!pXRefOffset) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
CPDF_Object* pFileLen = pDict ? pDict->GetElement("L") : NULL;
if (!pFileLen) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
FX_BOOL bNeedDownLoad = FALSE;
if (pEndOffSet->IsNumber()) {
FX_DWORD dwEnd = pEndOffSet->GetInteger();
dwEnd += 512;
- if ((FX_FILESIZE)dwEnd > m_dwFileLen) {
+ if ((FX_FILESIZE)dwEnd > m_dwFileLen)
dwEnd = (FX_DWORD)m_dwFileLen;
- }
+
int32_t iStartPos = (int32_t)(m_dwFileLen > 1024 ? 1024 : m_dwFileLen);
int32_t iSize = dwEnd > 1024 ? dwEnd - 1024 : 0;
if (!m_pFileAvail->IsDataAvail(iStartPos, iSize)) {
@@ -3270,6 +3438,7 @@ FX_BOOL CPDF_DataAvail::CheckFirstPage(IFX_DownloadHints* pHints) {
bNeedDownLoad = TRUE;
}
}
+
m_dwLastXRefOffset = 0;
FX_FILESIZE dwFileLen = 0;
if (pXRefOffset->IsNumber())
@@ -3292,19 +3461,23 @@ FX_BOOL CPDF_DataAvail::CheckFirstPage(IFX_DownloadHints* pHints) {
} else {
m_docStatus = PDF_DATAAVAIL_FIRSTPAGE_PREPARE;
}
+
if (bNeedDownLoad || m_docStatus != PDF_DATAAVAIL_FIRSTPAGE_PREPARE) {
m_docStatus = PDF_DATAAVAIL_FIRSTPAGE_PREPARE;
return FALSE;
}
+
m_docStatus =
m_bSupportHintTable ? PDF_DATAAVAIL_HINTTABLE : PDF_DATAAVAIL_DONE;
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::IsDataAvail(FX_FILESIZE offset,
FX_DWORD size,
IFX_DownloadHints* pHints) {
if (offset > m_dwFileLen)
return TRUE;
+
FX_SAFE_DWORD safeSize = pdfium::base::checked_cast<FX_DWORD>(offset);
safeSize += size;
safeSize += 512;
@@ -3312,27 +3485,32 @@ FX_BOOL CPDF_DataAvail::IsDataAvail(FX_FILESIZE offset,
size = m_dwFileLen - offset;
else
size += 512;
+
if (!m_pFileAvail->IsDataAvail(offset, size)) {
pHints->AddSegment(offset, size);
return FALSE;
}
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckHintTables(IFX_DownloadHints* pHints) {
CPDF_Dictionary* pDict = m_pLinearized->GetDict();
if (!pDict) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
if (!pDict->KeyExist("H") || !pDict->KeyExist("O") || !pDict->KeyExist("N")) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
int nPageCount = pDict->GetElementValue("N")->GetInteger();
if (nPageCount <= 1) {
m_docStatus = PDF_DATAAVAIL_DONE;
return TRUE;
}
+
CPDF_Array* pHintStreamRange = pDict->GetArrayBy("H");
FX_FILESIZE szHSStart =
pHintStreamRange->GetElementValue(0)
@@ -3346,10 +3524,12 @@ FX_BOOL CPDF_DataAvail::CheckHintTables(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
- if (!IsDataAvail(szHSStart, szHSLength, pHints)) {
+
+ if (!IsDataAvail(szHSStart, szHSLength, pHints))
return FALSE;
- }
+
m_syntaxParser.InitParser(m_pFileRead, m_dwHeaderOffset);
+
std::unique_ptr<CPDF_HintTables> pHintTables(
new CPDF_HintTables(this, pDict));
std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pHintStream(
@@ -3361,12 +3541,14 @@ FX_BOOL CPDF_DataAvail::CheckHintTables(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_DONE;
return TRUE;
}
+
CPDF_Object* CPDF_DataAvail::ParseIndirectObjectAt(
FX_FILESIZE pos,
FX_DWORD objnum,
CPDF_IndirectObjectHolder* pObjList) {
FX_FILESIZE SavedPos = m_syntaxParser.SavePos();
m_syntaxParser.RestorePos(pos);
+
bool bIsNumber;
CFX_ByteString word = m_syntaxParser.GetNextWord(&bIsNumber);
if (!bIsNumber)
@@ -3385,40 +3567,45 @@ CPDF_Object* CPDF_DataAvail::ParseIndirectObjectAt(
m_syntaxParser.RestorePos(SavedPos);
return nullptr;
}
+
CPDF_Object* pObj =
m_syntaxParser.GetObject(pObjList, parser_objnum, gennum, true);
m_syntaxParser.RestorePos(SavedPos);
return pObj;
}
+
IPDF_DataAvail::DocLinearizationStatus CPDF_DataAvail::IsLinearizedPDF() {
FX_DWORD req_size = 1024;
- if (!m_pFileAvail->IsDataAvail(0, req_size)) {
+ if (!m_pFileAvail->IsDataAvail(0, req_size))
return LinearizationUnknown;
- }
- if (!m_pFileRead) {
+
+ if (!m_pFileRead)
return NotLinearized;
- }
+
FX_FILESIZE dwSize = m_pFileRead->GetSize();
- if (dwSize < (FX_FILESIZE)req_size) {
+ if (dwSize < (FX_FILESIZE)req_size)
return LinearizationUnknown;
- }
+
uint8_t buffer[1024];
m_pFileRead->ReadBlock(buffer, 0, req_size);
- if (IsLinearizedFile(buffer, req_size)) {
+ if (IsLinearizedFile(buffer, req_size))
return Linearized;
- }
+
return NotLinearized;
}
FX_BOOL CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, FX_DWORD dwLen) {
ScopedFileStream file(FX_CreateMemoryStream(pData, (size_t)dwLen, FALSE));
+
int32_t offset = GetHeaderOffset(file.get());
if (offset == -1) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
m_dwHeaderOffset = offset;
m_syntaxParser.InitParser(file.get(), offset);
m_syntaxParser.RestorePos(m_syntaxParser.m_HeaderOffset + 9);
+
bool bNumber;
CFX_ByteString wordObjNum = m_syntaxParser.GetNextWord(&bNumber);
if (!bNumber)
@@ -3427,23 +3614,23 @@ FX_BOOL CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, FX_DWORD dwLen) {
FX_DWORD objnum = FXSYS_atoi(wordObjNum);
if (m_pLinearized) {
m_pLinearized->Release();
- m_pLinearized = NULL;
+ m_pLinearized = nullptr;
}
+
m_pLinearized =
ParseIndirectObjectAt(m_syntaxParser.m_HeaderOffset + 9, objnum);
- if (!m_pLinearized) {
+ if (!m_pLinearized)
return FALSE;
- }
CPDF_Dictionary* pDict = m_pLinearized->GetDict();
if (pDict && pDict->GetElement("Linearized")) {
CPDF_Object* pLen = pDict->GetElement("L");
- if (!pLen) {
+ if (!pLen)
return FALSE;
- }
- if ((FX_FILESIZE)pLen->GetInteger() != m_pFileRead->GetSize()) {
+
+ if ((FX_FILESIZE)pLen->GetInteger() != m_pFileRead->GetSize())
return FALSE;
- }
+
m_bLinearized = TRUE;
if (CPDF_Number* pNo = ToNumber(pDict->GetElement("P")))
@@ -3453,51 +3640,65 @@ FX_BOOL CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, FX_DWORD dwLen) {
}
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::CheckEnd(IFX_DownloadHints* pHints) {
FX_DWORD req_pos = (FX_DWORD)(m_dwFileLen > 1024 ? m_dwFileLen - 1024 : 0);
FX_DWORD dwSize = (FX_DWORD)(m_dwFileLen - req_pos);
+
if (m_pFileAvail->IsDataAvail(req_pos, dwSize)) {
uint8_t buffer[1024];
m_pFileRead->ReadBlock(buffer, req_pos, dwSize);
+
ScopedFileStream file(FX_CreateMemoryStream(buffer, (size_t)dwSize, FALSE));
m_syntaxParser.InitParser(file.get(), 0);
m_syntaxParser.RestorePos(dwSize - 1);
+
if (m_syntaxParser.SearchWord("startxref", TRUE, FALSE, dwSize)) {
m_syntaxParser.GetNextWord(nullptr);
+
bool bNumber;
CFX_ByteString xrefpos_str = m_syntaxParser.GetNextWord(&bNumber);
if (!bNumber) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
m_dwXRefOffset = (FX_FILESIZE)FXSYS_atoi64(xrefpos_str);
if (!m_dwXRefOffset || m_dwXRefOffset > m_dwFileLen) {
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
return TRUE;
}
+
m_dwLastXRefOffset = m_dwXRefOffset;
SetStartOffset(m_dwXRefOffset);
m_docStatus = PDF_DATAAVAIL_CROSSREF;
return TRUE;
}
+
m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
return TRUE;
}
+
pHints->AddSegment(req_pos, dwSize);
return FALSE;
}
+
int32_t CPDF_DataAvail::CheckCrossRefStream(IFX_DownloadHints* pHints,
FX_FILESIZE& xref_offset) {
xref_offset = 0;
FX_DWORD req_size =
(FX_DWORD)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
+
if (m_pFileAvail->IsDataAvail(m_Pos, req_size)) {
int32_t iSize = (int32_t)(m_Pos + req_size - m_dwCurrentXRefSteam);
CFX_BinaryBuf buf(iSize);
uint8_t* pBuf = buf.GetBuffer();
+
m_pFileRead->ReadBlock(pBuf, m_dwCurrentXRefSteam, iSize);
+
ScopedFileStream file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE));
m_parser.m_Syntax.InitParser(file.get(), 0);
+
bool bNumber;
CFX_ByteString objnum = m_parser.m_Syntax.GetNextWord(&bNumber);
if (!bNumber)
@@ -3509,6 +3710,7 @@ int32_t CPDF_DataAvail::CheckCrossRefStream(IFX_DownloadHints* pHints,
m_Pos += m_parser.m_Syntax.SavePos();
return 0;
}
+
CPDF_Dictionary* pDict = pObj->GetDict();
CPDF_Name* pName = ToName(pDict ? pDict->GetElement("Type") : nullptr);
if (pName) {
@@ -3525,6 +3727,7 @@ int32_t CPDF_DataAvail::CheckCrossRefStream(IFX_DownloadHints* pHints,
pHints->AddSegment(m_Pos, req_size);
return 0;
}
+
inline void CPDF_DataAvail::SetStartOffset(FX_FILESIZE dwOffset) {
m_Pos = dwOffset;
}
@@ -3612,22 +3815,22 @@ FX_BOOL CPDF_DataAvail::GetNextToken(CFX_ByteString& token) {
FX_BOOL CPDF_DataAvail::GetNextChar(uint8_t& ch) {
FX_FILESIZE pos = m_Pos;
- if (pos >= m_dwFileLen) {
+ if (pos >= m_dwFileLen)
return FALSE;
- }
+
if (m_bufferOffset >= pos ||
(FX_FILESIZE)(m_bufferOffset + m_bufferSize) <= pos) {
FX_FILESIZE read_pos = pos;
FX_DWORD read_size = 512;
- if ((FX_FILESIZE)read_size > m_dwFileLen) {
+ if ((FX_FILESIZE)read_size > m_dwFileLen)
read_size = (FX_DWORD)m_dwFileLen;
- }
- if ((FX_FILESIZE)(read_pos + read_size) > m_dwFileLen) {
+
+ if ((FX_FILESIZE)(read_pos + read_size) > m_dwFileLen)
read_pos = m_dwFileLen - read_size;
- }
- if (!m_pFileRead->ReadBlock(m_bufferData, read_pos, read_size)) {
+
+ if (!m_pFileRead->ReadBlock(m_bufferData, read_pos, read_size))
return FALSE;
- }
+
m_bufferOffset = read_pos;
m_bufferSize = read_size;
}
@@ -3635,6 +3838,7 @@ FX_BOOL CPDF_DataAvail::GetNextChar(uint8_t& ch) {
m_Pos++;
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckCrossRefItem(IFX_DownloadHints* pHints) {
int32_t iSize = 0;
CFX_ByteString token;
@@ -3644,6 +3848,7 @@ FX_BOOL CPDF_DataAvail::CheckCrossRefItem(IFX_DownloadHints* pHints) {
pHints->AddSegment(m_Pos, iSize);
return FALSE;
}
+
if (token == "trailer") {
m_dwTrailerOffset = m_Pos;
m_docStatus = PDF_DATAAVAIL_TRAILER;
@@ -3651,8 +3856,10 @@ FX_BOOL CPDF_DataAvail::CheckCrossRefItem(IFX_DownloadHints* pHints) {
}
}
}
+
FX_BOOL CPDF_DataAvail::CheckAllCrossRefStream(IFX_DownloadHints* pHints) {
FX_FILESIZE xref_offset = 0;
+
int32_t nRet = CheckCrossRefStream(pHints, xref_offset);
if (nRet == 1) {
if (!xref_offset) {
@@ -3663,11 +3870,12 @@ FX_BOOL CPDF_DataAvail::CheckAllCrossRefStream(IFX_DownloadHints* pHints) {
}
return TRUE;
}
- if (nRet == -1) {
+
+ if (nRet == -1)
m_docStatus = PDF_DATAAVAIL_ERROR;
- }
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::CheckCrossRef(IFX_DownloadHints* pHints) {
int32_t iSize = 0;
CFX_ByteString token;
@@ -3676,6 +3884,7 @@ FX_BOOL CPDF_DataAvail::CheckCrossRef(IFX_DownloadHints* pHints) {
pHints->AddSegment(m_Pos, iSize);
return FALSE;
}
+
if (token == "xref") {
while (1) {
if (!GetNextToken(token)) {
@@ -3685,6 +3894,7 @@ FX_BOOL CPDF_DataAvail::CheckCrossRef(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_CROSSREF_ITEM;
return FALSE;
}
+
if (token == "trailer") {
m_dwTrailerOffset = m_Pos;
m_docStatus = PDF_DATAAVAIL_TRAILER;
@@ -3697,16 +3907,19 @@ FX_BOOL CPDF_DataAvail::CheckCrossRef(IFX_DownloadHints* pHints) {
}
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::CheckTrailerAppend(IFX_DownloadHints* pHints) {
if (m_Pos < m_dwFileLen) {
FX_FILESIZE dwAppendPos = m_Pos + m_syntaxParser.SavePos();
int32_t iSize = (int32_t)(
dwAppendPos + 512 > m_dwFileLen ? m_dwFileLen - dwAppendPos : 512);
+
if (!m_pFileAvail->IsDataAvail(dwAppendPos, iSize)) {
pHints->AddSegment(dwAppendPos, iSize);
return FALSE;
}
}
+
if (m_dwPrevXRefOffset) {
SetStartOffset(m_dwPrevXRefOffset);
m_docStatus = PDF_DATAAVAIL_CROSSREF;
@@ -3727,11 +3940,13 @@ FX_BOOL CPDF_DataAvail::CheckTrailer(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
- if (!m_pFileRead->ReadBlock(pBuf, m_dwTrailerOffset, iSize)) {
+
+ if (!m_pFileRead->ReadBlock(pBuf, m_dwTrailerOffset, iSize))
return FALSE;
- }
+
ScopedFileStream file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE));
m_syntaxParser.InitParser(file.get(), 0);
+
std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>> pTrailer(
m_syntaxParser.GetObject(nullptr, 0, 0, true));
if (!pTrailer) {
@@ -3739,6 +3954,7 @@ FX_BOOL CPDF_DataAvail::CheckTrailer(IFX_DownloadHints* pHints) {
pHints->AddSegment(m_Pos, iTrailerSize);
return FALSE;
}
+
if (!pTrailer->IsDictionary())
return FALSE;
@@ -3777,14 +3993,12 @@ FX_BOOL CPDF_DataAvail::CheckPage(int32_t iPage, IFX_DownloadHints* pHints) {
while (TRUE) {
switch (m_docStatus) {
case PDF_DATAAVAIL_PAGETREE:
- if (!LoadDocPages(pHints)) {
+ if (!LoadDocPages(pHints))
return FALSE;
- }
break;
case PDF_DATAAVAIL_PAGE:
- if (!LoadDocPage(iPage, pHints)) {
+ if (!LoadDocPage(iPage, pHints))
return FALSE;
- }
break;
case PDF_DATAAVAIL_ERROR:
return LoadAllFile(pHints);
@@ -3797,6 +4011,7 @@ FX_BOOL CPDF_DataAvail::CheckPage(int32_t iPage, IFX_DownloadHints* pHints) {
}
}
}
+
FX_BOOL CPDF_DataAvail::CheckArrayPageNode(FX_DWORD dwPageNo,
CPDF_PageNode* pPageNode,
IFX_DownloadHints* pHints) {
@@ -3806,6 +4021,7 @@ FX_BOOL CPDF_DataAvail::CheckArrayPageNode(FX_DWORD dwPageNo,
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
if (!pPages) {
if (m_docStatus == PDF_DATAAVAIL_ERROR) {
m_docStatus = PDF_DATAAVAIL_ERROR;
@@ -3834,6 +4050,7 @@ FX_BOOL CPDF_DataAvail::CheckArrayPageNode(FX_DWORD dwPageNo,
pPages->Release();
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckUnkownPageNode(FX_DWORD dwPageNo,
CPDF_PageNode* pPageNode,
IFX_DownloadHints* pHints) {
@@ -3843,24 +4060,26 @@ FX_BOOL CPDF_DataAvail::CheckUnkownPageNode(FX_DWORD dwPageNo,
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
if (!pPage) {
- if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR)
m_docStatus = PDF_DATAAVAIL_ERROR;
- return FALSE;
- }
return FALSE;
}
+
if (pPage->IsArray()) {
pPageNode->m_dwPageNo = dwPageNo;
pPageNode->m_type = PDF_PAGENODE_ARRAY;
pPage->Release();
return TRUE;
}
+
if (!pPage->IsDictionary()) {
pPage->Release();
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
pPageNode->m_dwPageNo = dwPageNo;
CPDF_Dictionary* pDict = pPage->GetDict();
CFX_ByteString type = pDict->GetStringBy("Type");
@@ -3871,6 +4090,7 @@ FX_BOOL CPDF_DataAvail::CheckUnkownPageNode(FX_DWORD dwPageNo,
m_docStatus = PDF_DATAAVAIL_PAGE;
return TRUE;
}
+
switch (pKids->GetType()) {
case CPDF_Object::REFERENCE: {
CPDF_Reference* pKid = pKids->AsReference();
@@ -3903,24 +4123,26 @@ FX_BOOL CPDF_DataAvail::CheckUnkownPageNode(FX_DWORD dwPageNo,
pPage->Release();
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::CheckPageNode(CPDF_PageNode& pageNodes,
int32_t iPage,
int32_t& iCount,
IFX_DownloadHints* pHints,
int level) {
- if (level >= kMaxPageRecursionDepth) {
+ if (level >= kMaxPageRecursionDepth)
return FALSE;
- }
+
int32_t iSize = pageNodes.m_childNode.GetSize();
if (iSize <= 0 || iPage >= iSize) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
for (int32_t i = 0; i < iSize; ++i) {
CPDF_PageNode* pNode = pageNodes.m_childNode.GetAt(i);
- if (!pNode) {
+ if (!pNode)
continue;
- }
+
switch (pNode->m_type) {
case PDF_PAGENODE_UNKOWN:
if (!CheckUnkownPageNode(pNode->m_dwPageNo, pNode, pHints)) {
@@ -3930,22 +4152,20 @@ FX_BOOL CPDF_DataAvail::CheckPageNode(CPDF_PageNode& pageNodes,
break;
case PDF_PAGENODE_PAGE:
iCount++;
- if (iPage == iCount && m_pDocument) {
+ if (iPage == iCount && m_pDocument)
m_pDocument->m_PageList.SetAt(iPage, pNode->m_dwPageNo);
- }
break;
case PDF_PAGENODE_PAGES:
- if (!CheckPageNode(*pNode, iPage, iCount, pHints, level + 1)) {
+ if (!CheckPageNode(*pNode, iPage, iCount, pHints, level + 1))
return FALSE;
- }
break;
case PDF_PAGENODE_ARRAY:
- if (!CheckArrayPageNode(pNode->m_dwPageNo, pNode, pHints)) {
+ if (!CheckArrayPageNode(pNode->m_dwPageNo, pNode, pHints))
return FALSE;
- }
--i;
break;
}
+
if (iPage == iCount) {
m_docStatus = PDF_DATAAVAIL_DONE;
return TRUE;
@@ -3953,12 +4173,14 @@ FX_BOOL CPDF_DataAvail::CheckPageNode(CPDF_PageNode& pageNodes,
}
return TRUE;
}
+
FX_BOOL CPDF_DataAvail::LoadDocPage(int32_t iPage, IFX_DownloadHints* pHints) {
if (m_pDocument->GetPageCount() <= iPage ||
m_pDocument->m_PageList.GetAt(iPage)) {
m_docStatus = PDF_DATAAVAIL_DONE;
return TRUE;
}
+
if (m_pageNodes.m_type == PDF_PAGENODE_PAGE) {
if (iPage == 0) {
m_docStatus = PDF_DATAAVAIL_DONE;
@@ -3970,6 +4192,7 @@ FX_BOOL CPDF_DataAvail::LoadDocPage(int32_t iPage, IFX_DownloadHints* pHints) {
int32_t iCount = -1;
return CheckPageNode(m_pageNodes, iPage, iCount, pHints, 0);
}
+
FX_BOOL CPDF_DataAvail::CheckPageCount(IFX_DownloadHints* pHints) {
FX_BOOL bExist = FALSE;
CPDF_Object* pPages = GetObject(m_PagesObjNum, pHints, &bExist);
@@ -3977,118 +4200,130 @@ FX_BOOL CPDF_DataAvail::CheckPageCount(IFX_DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
- if (!pPages) {
+
+ if (!pPages)
return FALSE;
- }
+
CPDF_Dictionary* pPagesDict = pPages->GetDict();
if (!pPagesDict) {
pPages->Release();
m_docStatus = PDF_DATAAVAIL_ERROR;
return FALSE;
}
+
if (!pPagesDict->KeyExist("Kids")) {
pPages->Release();
return TRUE;
}
+
int count = pPagesDict->GetIntegerBy("Count");
if (count > 0) {
pPages->Release();
return TRUE;
}
+
pPages->Release();
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::LoadDocPages(IFX_DownloadHints* pHints) {
- if (!CheckUnkownPageNode(m_PagesObjNum, &m_pageNodes, pHints)) {
+ if (!CheckUnkownPageNode(m_PagesObjNum, &m_pageNodes, pHints))
return FALSE;
- }
+
if (CheckPageCount(pHints)) {
m_docStatus = PDF_DATAAVAIL_PAGE;
return TRUE;
}
+
m_bTotalLoadPageTree = TRUE;
return FALSE;
}
+
FX_BOOL CPDF_DataAvail::LoadPages(IFX_DownloadHints* pHints) {
while (!m_bPagesTreeLoad) {
- if (!CheckPageStatus(pHints)) {
+ if (!CheckPageStatus(pHints))
return FALSE;
- }
}
- if (m_bPagesLoad) {
+
+ if (m_bPagesLoad)
return TRUE;
- }
+
m_pDocument->LoadPages();
return FALSE;
}
+
IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedData(
IFX_DownloadHints* pHints) {
- if (m_bLinearedDataOK) {
+ if (m_bLinearedDataOK)
return DataAvailable;
- }
if (!m_bMainXRefLoadTried) {
FX_SAFE_DWORD data_size = m_dwFileLen;
data_size -= m_dwLastXRefOffset;
- if (!data_size.IsValid()) {
+ if (!data_size.IsValid())
return DataError;
- }
+
if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset,
data_size.ValueOrDie())) {
pHints->AddSegment(m_dwLastXRefOffset, data_size.ValueOrDie());
return DataNotAvailable;
}
+
CPDF_Parser::Error eRet =
m_pDocument->GetParser()->LoadLinearizedMainXRefTable();
m_bMainXRefLoadTried = TRUE;
- if (eRet != CPDF_Parser::SUCCESS) {
+ if (eRet != CPDF_Parser::SUCCESS)
return DataError;
- }
- if (!PreparePageItem()) {
+
+ if (!PreparePageItem())
return DataNotAvailable;
- }
+
m_bMainXRefLoadedOK = TRUE;
m_bLinearedDataOK = TRUE;
}
return m_bLinearedDataOK ? DataAvailable : DataNotAvailable;
}
+
FX_BOOL CPDF_DataAvail::CheckPageAnnots(int32_t iPage,
IFX_DownloadHints* pHints) {
if (!m_objs_array.GetSize()) {
m_objs_array.RemoveAll();
m_ObjectSet.clear();
+
CPDF_Dictionary* pPageDict = m_pDocument->GetPage(iPage);
- if (!pPageDict) {
+ if (!pPageDict)
return TRUE;
- }
+
CPDF_Object* pAnnots = pPageDict->GetElement("Annots");
- if (!pAnnots) {
+ if (!pAnnots)
return TRUE;
- }
+
CFX_ArrayTemplate<CPDF_Object*> obj_array;
obj_array.Add(pAnnots);
+
FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
- if (bRet) {
+ if (bRet)
m_objs_array.RemoveAll();
- }
+
return bRet;
}
+
CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
m_objs_array.RemoveAll();
- if (!bRet) {
+ if (!bRet)
m_objs_array.Append(new_objs_array);
- }
+
return bRet;
}
+
IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedFirstPage(
int32_t iPage,
IFX_DownloadHints* pHints) {
if (!m_bAnnotsLoad) {
- if (!CheckPageAnnots(iPage, pHints)) {
+ if (!CheckPageAnnots(iPage, pHints))
return DataNotAvailable;
- }
m_bAnnotsLoad = TRUE;
}
@@ -4097,32 +4332,35 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedFirstPage(
m_bPageLoadedOK = FALSE;
return nRet;
}
+
FX_BOOL CPDF_DataAvail::HaveResourceAncestor(CPDF_Dictionary* pDict) {
CFX_AutoRestorer<int> restorer(&s_CurrentDataAvailRecursionDepth);
- if (++s_CurrentDataAvailRecursionDepth > kMaxDataAvailRecursionDepth) {
+ if (++s_CurrentDataAvailRecursionDepth > kMaxDataAvailRecursionDepth)
return FALSE;
- }
+
CPDF_Object* pParent = pDict->GetElement("Parent");
- if (!pParent) {
+ if (!pParent)
return FALSE;
- }
+
CPDF_Dictionary* pParentDict = pParent->GetDict();
- if (!pParentDict) {
+ if (!pParentDict)
return FALSE;
- }
+
CPDF_Object* pRet = pParentDict->GetElement("Resources");
if (pRet) {
m_pPageResource = pRet;
return TRUE;
}
+
return HaveResourceAncestor(pParentDict);
}
+
IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
int32_t iPage,
IFX_DownloadHints* pHints) {
- if (!m_pDocument) {
+ if (!m_pDocument)
return DataError;
- }
+
if (IsFirstCheck(iPage)) {
m_bCurPageDictLoadOK = FALSE;
m_bPageLoadedOK = FALSE;
@@ -4131,6 +4369,7 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
m_objs_array.RemoveAll();
m_ObjectSet.clear();
}
+
if (pdfium::ContainsKey(m_pagesLoadState, iPage))
return DataAvailable;
@@ -4141,10 +4380,11 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
m_pagesLoadState.insert(iPage);
return nRet;
}
+
DocAvailStatus nResult = CheckLinearizedData(pHints);
- if (nResult != DataAvailable) {
+ if (nResult != DataAvailable)
return nResult;
- }
+
if (m_pHintTables) {
nResult = m_pHintTables->CheckPage(iPage, pHints);
if (nResult != DataAvailable)
@@ -4152,46 +4392,46 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
m_pagesLoadState.insert(iPage);
return DataAvailable;
}
+
if (m_bMainXRefLoadedOK) {
if (m_bTotalLoadPageTree) {
- if (!LoadPages(pHints)) {
+ if (!LoadPages(pHints))
return DataNotAvailable;
- }
} else {
- if (!m_bCurPageDictLoadOK && !CheckPage(iPage, pHints)) {
+ if (!m_bCurPageDictLoadOK && !CheckPage(iPage, pHints))
return DataNotAvailable;
- }
}
} else {
- if (!LoadAllFile(pHints)) {
+ if (!LoadAllFile(pHints))
return DataNotAvailable;
- }
m_pDocument->GetParser()->RebuildCrossRef();
ResetFirstCheck(iPage);
return DataAvailable;
}
} else {
- if (!m_bTotalLoadPageTree) {
- if (!m_bCurPageDictLoadOK && !CheckPage(iPage, pHints)) {
- return DataNotAvailable;
- }
+ if (!m_bTotalLoadPageTree && !m_bCurPageDictLoadOK &&
+ !CheckPage(iPage, pHints)) {
+ return DataNotAvailable;
}
}
+
if (m_bHaveAcroForm && !m_bAcroFormLoad) {
- if (!CheckAcroFormSubObject(pHints)) {
+ if (!CheckAcroFormSubObject(pHints))
return DataNotAvailable;
- }
m_bAcroFormLoad = TRUE;
}
+
if (!m_bPageLoadedOK) {
if (!m_objs_array.GetSize()) {
m_objs_array.RemoveAll();
m_ObjectSet.clear();
+
m_pPageDict = m_pDocument->GetPage(iPage);
if (!m_pPageDict) {
ResetFirstCheck(iPage);
return DataAvailable;
}
+
CFX_ArrayTemplate<CPDF_Object*> obj_array;
obj_array.Add(m_pPageDict);
FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
@@ -4203,6 +4443,7 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
FX_BOOL bRet =
IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
+
m_objs_array.RemoveAll();
if (!bRet) {
m_objs_array.Append(new_objs_array);
@@ -4213,62 +4454,63 @@ IPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
}
if (!m_bAnnotsLoad) {
- if (!CheckPageAnnots(iPage, pHints)) {
+ if (!CheckPageAnnots(iPage, pHints))
return DataNotAvailable;
- }
m_bAnnotsLoad = TRUE;
}
if (m_pPageDict && !m_bNeedDownLoadResource) {
m_pPageResource = m_pPageDict->GetElement("Resources");
- if (!m_pPageResource) {
+ if (!m_pPageResource)
m_bNeedDownLoadResource = HaveResourceAncestor(m_pPageDict);
- } else {
+ else
m_bNeedDownLoadResource = TRUE;
- }
}
+
if (m_bNeedDownLoadResource) {
FX_BOOL bRet = CheckResources(pHints);
- if (!bRet) {
+ if (!bRet)
return DataNotAvailable;
- }
m_bNeedDownLoadResource = FALSE;
}
+
m_bPageLoadedOK = FALSE;
m_bAnnotsLoad = FALSE;
m_bCurPageDictLoadOK = FALSE;
+
ResetFirstCheck(iPage);
m_pagesLoadState.insert(iPage);
return DataAvailable;
}
+
FX_BOOL CPDF_DataAvail::CheckResources(IFX_DownloadHints* pHints) {
if (!m_objs_array.GetSize()) {
m_objs_array.RemoveAll();
CFX_ArrayTemplate<CPDF_Object*> obj_array;
obj_array.Add(m_pPageResource);
+
FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
- if (bRet) {
+ if (bRet)
m_objs_array.RemoveAll();
- }
return bRet;
}
+
CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
m_objs_array.RemoveAll();
- if (!bRet) {
+ if (!bRet)
m_objs_array.Append(new_objs_array);
- }
return bRet;
}
+
void CPDF_DataAvail::GetLinearizedMainXRefInfo(FX_FILESIZE* pPos,
FX_DWORD* pSize) {
- if (pPos) {
+ if (pPos)
*pPos = m_dwLastXRefOffset;
- }
- if (pSize) {
+ if (pSize)
*pSize = (FX_DWORD)(m_dwFileLen - m_dwLastXRefOffset);
- }
}
+
int CPDF_DataAvail::GetPageCount() const {
if (m_pLinearized) {
CPDF_Dictionary* pDict = m_pLinearized->GetDict();
@@ -4277,13 +4519,15 @@ int CPDF_DataAvail::GetPageCount() const {
}
return m_pDocument ? m_pDocument->GetPageCount() : 0;
}
+
CPDF_Dictionary* CPDF_DataAvail::GetPage(int index) {
- if (!m_pDocument || index < 0 || index >= GetPageCount()) {
+ if (!m_pDocument || index < 0 || index >= GetPageCount())
return nullptr;
- }
+
if (m_pLinearized) {
CPDF_Dictionary* pDict = m_pLinearized->GetDict();
CPDF_Object* pObj = pDict ? pDict->GetElementValue("P") : nullptr;
+
int pageNum = pObj ? pObj->GetInteger() : 0;
if (m_pHintTables && index != pageNum) {
FX_FILESIZE szPageStartPos = 0;
@@ -4291,14 +4535,14 @@ CPDF_Dictionary* CPDF_DataAvail::GetPage(int index) {
FX_DWORD dwObjNum = 0;
FX_BOOL bPagePosGot = m_pHintTables->GetPagePos(index, szPageStartPos,
szPageLength, dwObjNum);
- if (!bPagePosGot) {
+ if (!bPagePosGot)
return nullptr;
- }
+
m_syntaxParser.InitParser(m_pFileRead, (FX_DWORD)szPageStartPos);
CPDF_Object* pPageDict = ParseIndirectObjectAt(0, dwObjNum, m_pDocument);
- if (!pPageDict) {
+ if (!pPageDict)
return nullptr;
- }
+
if (!m_pDocument->InsertIndirectObject(dwObjNum, pPageDict))
return nullptr;
return pPageDict->GetDict();
@@ -4306,31 +4550,32 @@ CPDF_Dictionary* CPDF_DataAvail::GetPage(int index) {
}
return m_pDocument->GetPage(index);
}
+
IPDF_DataAvail::DocFormStatus CPDF_DataAvail::IsFormAvail(
IFX_DownloadHints* pHints) {
- if (!m_pDocument) {
+ if (!m_pDocument)
return FormAvailable;
- }
+
if (!m_bLinearizedFormParamLoad) {
CPDF_Dictionary* pRoot = m_pDocument->GetRoot();
- if (!pRoot) {
+ if (!pRoot)
return FormAvailable;
- }
+
CPDF_Object* pAcroForm = pRoot->GetElement("AcroForm");
- if (!pAcroForm) {
+ if (!pAcroForm)
return FormNotExist;
- }
+
DocAvailStatus nDocStatus = CheckLinearizedData(pHints);
if (nDocStatus == DataError)
return FormError;
if (nDocStatus == DataNotAvailable)
return FormNotAvailable;
- if (!m_objs_array.GetSize()) {
+ if (!m_objs_array.GetSize())
m_objs_array.Add(pAcroForm->GetDict());
- }
m_bLinearizedFormParamLoad = TRUE;
}
+
CFX_ArrayTemplate<CPDF_Object*> new_objs_array;
FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
m_objs_array.RemoveAll();
@@ -4342,17 +4587,18 @@ IPDF_DataAvail::DocFormStatus CPDF_DataAvail::IsFormAvail(
}
CPDF_PageNode::~CPDF_PageNode() {
- for (int32_t i = 0; i < m_childNode.GetSize(); ++i) {
+ for (int32_t i = 0; i < m_childNode.GetSize(); ++i)
delete m_childNode[i];
- }
m_childNode.RemoveAll();
}
+
CPDF_HintTables::~CPDF_HintTables() {
m_dwDeltaNObjsArray.RemoveAll();
m_dwNSharedObjsArray.RemoveAll();
m_dwSharedObjNumArray.RemoveAll();
m_dwIdentifierArray.RemoveAll();
}
+
FX_DWORD CPDF_HintTables::GetItemLength(
int index,
const std::vector<FX_FILESIZE>& szArray) {
@@ -4363,9 +4609,11 @@ FX_DWORD CPDF_HintTables::GetItemLength(
}
return szArray[index + 1] - szArray[index];
}
+
FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
if (!hStream || hStream->IsEOF())
return FALSE;
+
int nStreamOffset = ReadPrimaryHintStreamOffset();
int nStreamLen = ReadPrimaryHintStreamLength();
if (nStreamOffset < 0 || nStreamLen < 1)
@@ -4374,8 +4622,10 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
const FX_DWORD kHeaderSize = 288;
if (hStream->BitsRemaining() < kHeaderSize)
return FALSE;
+
// Item 1: The least number of objects in a page.
FX_DWORD dwObjLeastNum = hStream->GetBits(32);
+
// Item 2: The location of the first page's page object.
FX_DWORD dwFirstObjLoc = hStream->GetBits(32);
if (dwFirstObjLoc > nStreamOffset) {
@@ -4389,29 +4639,38 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
m_szFirstPageObjOffset =
pdfium::base::checked_cast<FX_FILESIZE>(dwFirstObjLoc);
}
+
// Item 3: The number of bits needed to represent the difference
// between the greatest and least number of objects in a page.
FX_DWORD dwDeltaObjectsBits = hStream->GetBits(16);
+
// Item 4: The least length of a page in bytes.
FX_DWORD dwPageLeastLen = hStream->GetBits(32);
+
// Item 5: The number of bits needed to represent the difference
// between the greatest and least length of a page, in bytes.
FX_DWORD dwDeltaPageLenBits = hStream->GetBits(16);
+
// Skip Item 6, 7, 8, 9 total 96 bits.
hStream->SkipBits(96);
+
// Item 10: The number of bits needed to represent the greatest
// number of shared object references.
FX_DWORD dwSharedObjBits = hStream->GetBits(16);
+
// Item 11: The number of bits needed to represent the numerically
// greatest shared object identifier used by the pages.
FX_DWORD dwSharedIdBits = hStream->GetBits(16);
+
// Item 12: The number of bits needed to represent the numerator of
// the fractional position for each shared object reference. For each
// shared object referenced from a page, there is an indication of
// where in the page's content stream the object is first referenced.
FX_DWORD dwSharedNumeratorBits = hStream->GetBits(16);
+
// Item 13: Skip Item 13 which has 16 bits.
hStream->SkipBits(16);
+
CPDF_Object* pPageNum = m_pLinearizedDict->GetElementValue("N");
int nPages = pPageNum ? pPageNum->GetInteger() : 0;
if (nPages < 1)
@@ -4421,6 +4680,7 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
required_bits *= pdfium::base::checked_cast<FX_DWORD>(nPages);
if (!CanReadFromBitStream(hStream, required_bits))
return FALSE;
+
for (int i = 0; i < nPages; ++i) {
FX_SAFE_DWORD safeDeltaObj = hStream->GetBits(dwDeltaObjectsBits);
safeDeltaObj += dwObjLeastNum;
@@ -4434,6 +4694,7 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
required_bits *= pdfium::base::checked_cast<FX_DWORD>(nPages);
if (!CanReadFromBitStream(hStream, required_bits))
return FALSE;
+
CFX_DWordArray dwPageLenArray;
for (int i = 0; i < nPages; ++i) {
FX_SAFE_DWORD safePageLen = hStream->GetBits(dwDeltaPageLenBits);
@@ -4442,10 +4703,12 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
return FALSE;
dwPageLenArray.Add(safePageLen.ValueOrDie());
}
+
CPDF_Object* pOffsetE = m_pLinearizedDict->GetElementValue("E");
int nOffsetE = pOffsetE ? pOffsetE->GetInteger() : -1;
if (nOffsetE < 0)
return FALSE;
+
CPDF_Object* pFirstPageNum = m_pLinearizedDict->GetElementValue("P");
int nFirstPageNum = pFirstPageNum ? pFirstPageNum->GetInteger() : 0;
for (int i = 0; i < nPages; ++i) {
@@ -4467,31 +4730,32 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
}
}
}
+
if (nPages > 0) {
m_szPageOffsetArray.push_back(m_szPageOffsetArray[nPages - 1] +
dwPageLenArray[nPages - 1]);
}
hStream->ByteAlign();
- // number of shared objects
+ // Number of shared objects.
required_bits = dwSharedObjBits;
required_bits *= pdfium::base::checked_cast<FX_DWORD>(nPages);
if (!CanReadFromBitStream(hStream, required_bits))
return FALSE;
- for (int i = 0; i < nPages; i++) {
+
+ for (int i = 0; i < nPages; i++)
m_dwNSharedObjsArray.Add(hStream->GetBits(dwSharedObjBits));
- }
hStream->ByteAlign();
- // array of identifier, sizes = nshared_objects
+ // Array of identifiers, size = nshared_objects.
for (int i = 0; i < nPages; i++) {
required_bits = dwSharedIdBits;
required_bits *= m_dwNSharedObjsArray[i];
if (!CanReadFromBitStream(hStream, required_bits))
return FALSE;
- for (int j = 0; j < m_dwNSharedObjsArray[i]; j++) {
+
+ for (int j = 0; j < m_dwNSharedObjsArray[i]; j++)
m_dwIdentifierArray.Add(hStream->GetBits(dwSharedIdBits));
- }
}
hStream->ByteAlign();
@@ -4500,6 +4764,7 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
safeSize *= dwSharedNumeratorBits;
if (!CanReadFromBitStream(hStream, safeSize))
return FALSE;
+
hStream->SkipBits(safeSize.ValueOrDie());
}
hStream->ByteAlign();
@@ -4508,14 +4773,17 @@ FX_BOOL CPDF_HintTables::ReadPageHintTable(CFX_BitStream* hStream) {
safeTotalPageLen *= dwDeltaPageLenBits;
if (!CanReadFromBitStream(hStream, safeTotalPageLen))
return FALSE;
+
hStream->SkipBits(safeTotalPageLen.ValueOrDie());
hStream->ByteAlign();
return TRUE;
}
+
FX_BOOL CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
FX_DWORD offset) {
if (!hStream || hStream->IsEOF())
return FALSE;
+
int nStreamOffset = ReadPrimaryHintStreamOffset();
int nStreamLen = ReadPrimaryHintStreamLength();
if (nStreamOffset < 0 || nStreamLen < 1)
@@ -4530,23 +4798,30 @@ FX_BOOL CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
const FX_DWORD kHeaderSize = 192;
if (hStream->BitsRemaining() < kHeaderSize)
return FALSE;
+
// Item 1: The object number of the first object in the shared objects
// section.
FX_DWORD dwFirstSharedObjNum = hStream->GetBits(32);
+
// Item 2: The location of the first object in the shared objects section.
FX_DWORD dwFirstSharedObjLoc = hStream->GetBits(32);
if (dwFirstSharedObjLoc > nStreamOffset)
dwFirstSharedObjLoc += nStreamLen;
+
// Item 3: The number of shared object entries for the first page.
m_nFirstPageSharedObjs = hStream->GetBits(32);
+
// Item 4: The number of shared object entries for the shared objects
// section, including the number of shared object entries for the first page.
FX_DWORD dwSharedObjTotal = hStream->GetBits(32);
+
// Item 5: The number of bits needed to represent the greatest number of
// objects in a shared object group. Skipped.
hStream->SkipBits(16);
+
// Item 6: The least length of a shared object group in bytes.
FX_DWORD dwGroupLeastLen = hStream->GetBits(32);
+
// Item 7: The number of bits needed to represent the difference between the
// greatest and least length of a shared object group, in bytes.
FX_DWORD dwDeltaGroupLen = hStream->GetBits(16);
@@ -4554,6 +4829,7 @@ FX_BOOL CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
int nFirstPageObjNum = pFirstPageObj ? pFirstPageObj->GetInteger() : -1;
if (nFirstPageObjNum < 0)
return FALSE;
+
FX_DWORD dwPrevObjLen = 0;
FX_DWORD dwCurObjLen = 0;
FX_SAFE_DWORD required_bits = dwSharedObjTotal;
@@ -4567,6 +4843,7 @@ FX_BOOL CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
safeObjLen += dwGroupLeastLen;
if (!safeObjLen.IsValid())
return FALSE;
+
dwCurObjLen = safeObjLen.ValueOrDie();
if (i < m_nFirstPageSharedObjs) {
m_dwSharedObjNumArray.Add(nFirstPageObjNum + i);
@@ -4577,51 +4854,65 @@ FX_BOOL CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
safeObjNum += i - m_nFirstPageSharedObjs;
if (!safeObjNum.IsValid())
return FALSE;
+
m_dwSharedObjNumArray.Add(safeObjNum.ValueOrDie());
- if (i == m_nFirstPageSharedObjs)
+ if (i == m_nFirstPageSharedObjs) {
m_szSharedObjOffsetArray.push_back(
pdfium::base::checked_cast<int32_t>(dwFirstSharedObjLoc));
+ }
}
+
if (i != 0 && i != m_nFirstPageSharedObjs) {
FX_SAFE_INT32 safeLoc = pdfium::base::checked_cast<int32_t>(dwPrevObjLen);
safeLoc += m_szSharedObjOffsetArray[i - 1];
if (!safeLoc.IsValid())
return FALSE;
+
m_szSharedObjOffsetArray.push_back(safeLoc.ValueOrDie());
}
}
+
if (dwSharedObjTotal > 0) {
FX_SAFE_INT32 safeLoc = pdfium::base::checked_cast<int32_t>(dwCurObjLen);
safeLoc += m_szSharedObjOffsetArray[dwSharedObjTotal - 1];
if (!safeLoc.IsValid())
return FALSE;
+
m_szSharedObjOffsetArray.push_back(safeLoc.ValueOrDie());
}
+
hStream->ByteAlign();
if (hStream->BitsRemaining() < dwSharedObjTotal)
return FALSE;
+
hStream->SkipBits(dwSharedObjTotal);
hStream->ByteAlign();
return TRUE;
}
+
FX_BOOL CPDF_HintTables::GetPagePos(int index,
FX_FILESIZE& szPageStartPos,
FX_FILESIZE& szPageLength,
FX_DWORD& dwObjNum) {
if (!m_pLinearizedDict)
return FALSE;
+
szPageStartPos = m_szPageOffsetArray[index];
szPageLength = GetItemLength(index, m_szPageOffsetArray);
+
CPDF_Object* pFirstPageNum = m_pLinearizedDict->GetElementValue("P");
int nFirstPageNum = pFirstPageNum ? pFirstPageNum->GetInteger() : 0;
+
CPDF_Object* pFirstPageObjNum = m_pLinearizedDict->GetElementValue("O");
if (!pFirstPageObjNum)
return FALSE;
+
int nFirstPageObjNum = pFirstPageObjNum->GetInteger();
if (index == nFirstPageNum) {
dwObjNum = nFirstPageObjNum;
return TRUE;
}
+
// The object number of remaining pages starts from 1.
dwObjNum = 1;
for (int i = 0; i < index; ++i) {
@@ -4631,45 +4922,54 @@ FX_BOOL CPDF_HintTables::GetPagePos(int index,
}
return TRUE;
}
+
IPDF_DataAvail::DocAvailStatus CPDF_HintTables::CheckPage(
int index,
IFX_DownloadHints* pHints) {
if (!m_pLinearizedDict || !pHints)
return IPDF_DataAvail::DataError;
+
CPDF_Object* pFirstAvailPage = m_pLinearizedDict->GetElementValue("P");
int nFirstAvailPage = pFirstAvailPage ? pFirstAvailPage->GetInteger() : 0;
if (index == nFirstAvailPage)
return IPDF_DataAvail::DataAvailable;
+
FX_DWORD dwLength = GetItemLength(index, m_szPageOffsetArray);
// If two pages have the same offset, it should be treated as an error.
if (!dwLength)
return IPDF_DataAvail::DataError;
+
if (!m_pDataAvail->IsDataAvail(m_szPageOffsetArray[index], dwLength, pHints))
return IPDF_DataAvail::DataNotAvailable;
+
// Download data of shared objects in the page.
FX_DWORD offset = 0;
- for (int i = 0; i < index; ++i) {
+ for (int i = 0; i < index; ++i)
offset += m_dwNSharedObjsArray[i];
- }
+
CPDF_Object* pFirstPageObj = m_pLinearizedDict->GetElementValue("O");
int nFirstPageObjNum = pFirstPageObj ? pFirstPageObj->GetInteger() : -1;
if (nFirstPageObjNum < 0)
return IPDF_DataAvail::DataError;
+
FX_DWORD dwIndex = 0;
FX_DWORD dwObjNum = 0;
for (int j = 0; j < m_dwNSharedObjsArray[index]; ++j) {
dwIndex = m_dwIdentifierArray[offset + j];
if (dwIndex >= m_dwSharedObjNumArray.GetSize())
return IPDF_DataAvail::DataNotAvailable;
+
dwObjNum = m_dwSharedObjNumArray[dwIndex];
if (dwObjNum >= nFirstPageObjNum &&
dwObjNum < nFirstPageObjNum + m_nFirstPageSharedObjs) {
continue;
}
+
dwLength = GetItemLength(dwIndex, m_szSharedObjOffsetArray);
// If two objects have the same offset, it should be treated as an error.
if (!dwLength)
return IPDF_DataAvail::DataError;
+
if (!m_pDataAvail->IsDataAvail(m_szSharedObjOffsetArray[dwIndex], dwLength,
pHints)) {
return IPDF_DataAvail::DataNotAvailable;
@@ -4681,13 +4981,16 @@ IPDF_DataAvail::DocAvailStatus CPDF_HintTables::CheckPage(
FX_BOOL CPDF_HintTables::LoadHintStream(CPDF_Stream* pHintStream) {
if (!pHintStream || !m_pLinearizedDict)
return FALSE;
+
CPDF_Dictionary* pDict = pHintStream->GetDict();
CPDF_Object* pOffset = pDict ? pDict->GetElement("S") : nullptr;
if (!pOffset || !pOffset->IsNumber())
return FALSE;
+
int shared_hint_table_offset = pOffset->GetInteger();
CPDF_StreamAcc acc;
acc.LoadAllData(pHintStream);
+
FX_DWORD size = acc.GetSize();
// The header section of page offset hint table is 36 bytes.
// The header section of shared object hint table is 24 bytes.
@@ -4697,6 +5000,7 @@ FX_BOOL CPDF_HintTables::LoadHintStream(CPDF_Stream* pHintStream) {
size < shared_hint_table_offset) {
return FALSE;
}
+
CFX_BitStream bs;
bs.Init(acc.GetData(), size);
return ReadPageHintTable(&bs) &&
@@ -4707,22 +5011,29 @@ FX_BOOL CPDF_HintTables::LoadHintStream(CPDF_Stream* pHintStream) {
int CPDF_HintTables::ReadPrimaryHintStreamOffset() const {
if (!m_pLinearizedDict)
return -1;
+
CPDF_Array* pRange = m_pLinearizedDict->GetArrayBy("H");
if (!pRange)
return -1;
+
CPDF_Object* pStreamOffset = pRange->GetElementValue(0);
if (!pStreamOffset)
return -1;
+
return pStreamOffset->GetInteger();
}
+
int CPDF_HintTables::ReadPrimaryHintStreamLength() const {
if (!m_pLinearizedDict)
return -1;
+
CPDF_Array* pRange = m_pLinearizedDict->GetArrayBy("H");
if (!pRange)
return -1;
+
CPDF_Object* pStreamLen = pRange->GetElementValue(1);
if (!pStreamLen)
return -1;
+
return pStreamLen->GetInteger();
}