diff options
Diffstat (limited to 'core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp')
| -rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp | 4378 |
1 files changed, 4378 insertions, 0 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp new file mode 100644 index 0000000000..b3e587a2a0 --- /dev/null +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp @@ -0,0 +1,4378 @@ +// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "../../../include/fpdfapi/fpdf_parser.h"
+#include "../../../include/fpdfapi/fpdf_module.h"
+#include "../../../include/fpdfapi/fpdf_page.h"
+#include "../fpdf_page/pageint.h"
+#include <limits.h>
+#define _PARSER_OBJECT_LEVLE_ 64
+extern const FX_LPCSTR _PDF_CharType;
+FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict)
+{
+ CPDF_Object* pType = pDict->GetElementValue(FX_BSTRC("Type"));
+ if (!pType) {
+ pType = pDict->GetElementValue(FX_BSTRC("FT"));
+ if (!pType) {
+ return FALSE;
+ }
+ }
+ if (pType->GetString() == FX_BSTRC("Sig")) {
+ return TRUE;
+ }
+ return FALSE;
+}
+static FX_INT32 _CompareDWord(const void* p1, const void* p2)
+{
+ return (*(FX_DWORD*)p1) - (*(FX_DWORD*)p2);
+}
+static int _CompareFileSize(const void* p1, const void* p2)
+{
+ FX_FILESIZE ret = (*(FX_FILESIZE*)p1) - (*(FX_FILESIZE*)p2);
+ if (ret > 0) {
+ return 1;
+ }
+ if (ret < 0) {
+ return -1;
+ }
+ return 0;
+}
+CPDF_Parser::CPDF_Parser()
+{
+ m_pDocument = NULL;
+ m_pTrailer = NULL;
+ m_pEncryptDict = NULL;
+ m_pSecurityHandler = NULL;
+ m_pLinearized = NULL;
+ m_dwFirstPageNo = 0;
+ m_dwXrefStartObjNum = 0;
+ m_bOwnFileRead = TRUE;
+ m_bForceUseSecurityHandler = FALSE;
+}
+CPDF_Parser::~CPDF_Parser()
+{
+ CloseParser(FALSE);
+}
+FX_DWORD CPDF_Parser::GetLastObjNum()
+{
+ FX_DWORD dwSize = m_CrossRef.GetSize();
+ return dwSize ? dwSize - 1 : 0;
+}
+void CPDF_Parser::SetEncryptDictionary(CPDF_Dictionary* pDict)
+{
+ m_pEncryptDict = pDict;
+}
+void CPDF_Parser::CloseParser(FX_BOOL bReParse)
+{
+ m_bVersionUpdated = FALSE;
+ if (m_pDocument && !bReParse) {
+ delete m_pDocument;
+ m_pDocument = NULL;
+ }
+ if (m_pTrailer) {
+ m_pTrailer->Release();
+ m_pTrailer = NULL;
+ }
+ ReleaseEncryptHandler();
+ SetEncryptDictionary(NULL);
+ if (m_bOwnFileRead && m_Syntax.m_pFileAccess != NULL) {
+ m_Syntax.m_pFileAccess->Release();
+ m_Syntax.m_pFileAccess = NULL;
+ }
+ FX_POSITION pos = m_ObjectStreamMap.GetStartPosition();
+ while (pos) {
+ FX_LPVOID objnum;
+ CPDF_StreamAcc* pStream;
+ m_ObjectStreamMap.GetNextAssoc(pos, objnum, (void*&)pStream);
+ delete pStream;
+ }
+ m_ObjectStreamMap.RemoveAll();
+ m_SortedOffset.RemoveAll();
+ m_CrossRef.RemoveAll();
+ m_V5Type.RemoveAll();
+ m_ObjVersion.RemoveAll();
+ FX_INT32 iLen = m_Trailers.GetSize();
+ for (FX_INT32 i = 0; i < iLen; ++i) {
+ m_Trailers.GetAt(i)->Release();
+ }
+ m_Trailers.RemoveAll();
+ if (m_pLinearized) {
+ m_pLinearized->Release();
+ m_pLinearized = NULL;
+ }
+}
+static FX_INT32 GetHeaderOffset(IFX_FileRead* pFile)
+{
+ FX_DWORD tag = FXDWORD_FROM_LSBFIRST(0x46445025);
+ FX_BYTE buf[4];
+ FX_INT32 offset = 0;
+ while (1) {
+ if (!pFile->ReadBlock(buf, offset, 4)) {
+ return -1;
+ }
+ if (*(FX_DWORD*)buf == tag) {
+ return offset;
+ }
+ offset ++;
+ if (offset > 1024) {
+ return -1;
+ }
+ }
+ return -1;
+}
+FX_DWORD CPDF_Parser::StartParse(FX_LPCSTR filename, FX_BOOL bReParse)
+{
+ IFX_FileRead* pFileAccess = FX_CreateFileRead(filename);
+ if (!pFileAccess) {
+ return PDFPARSE_ERROR_FILE;
+ }
+ return StartParse(pFileAccess, bReParse);
+}
+FX_DWORD CPDF_Parser::StartParse(FX_LPCWSTR filename, FX_BOOL bReParse)
+{
+ IFX_FileRead* pFileAccess = FX_CreateFileRead(filename);
+ if (!pFileAccess) {
+ return PDFPARSE_ERROR_FILE;
+ }
+ return StartParse(pFileAccess, bReParse);
+}
+CPDF_SecurityHandler* FPDF_CreateStandardSecurityHandler();
+CPDF_SecurityHandler* FPDF_CreatePubKeyHandler(void*);
+FX_DWORD CPDF_Parser::StartParse(IFX_FileRead* pFileAccess, FX_BOOL bReParse, FX_BOOL bOwnFileRead)
+{
+ CloseParser(bReParse);
+ m_bXRefStream = FALSE;
+ m_LastXRefOffset = 0;
+ m_bOwnFileRead = bOwnFileRead;
+ FX_INT32 offset = GetHeaderOffset(pFileAccess);
+ if (offset == -1) {
+ if (bOwnFileRead && pFileAccess) {
+ pFileAccess->Release();
+ }
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ m_Syntax.InitParser(pFileAccess, offset);
+ FX_BYTE ch;
+ m_Syntax.GetCharAt(5, ch);
+ m_FileVersion = (ch - '0') * 10;
+ m_Syntax.GetCharAt(7, ch);
+ m_FileVersion += ch - '0';
+ m_Syntax.RestorePos(m_Syntax.m_FileLen - m_Syntax.m_HeaderOffset - 9);
+ if (!bReParse) {
+ m_pDocument = FX_NEW CPDF_Document(this);
+ }
+ FX_BOOL bXRefRebuilt = FALSE;
+ if (m_Syntax.SearchWord(FX_BSTRC("startxref"), TRUE, FALSE, 4096)) {
+ FX_FILESIZE startxref_offset = m_Syntax.SavePos();
+ FX_LPVOID pResult = FXSYS_bsearch(&startxref_offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(startxref_offset);
+ }
+ m_Syntax.GetKeyword();
+ FX_BOOL bNumber;
+ CFX_ByteString xrefpos_str = m_Syntax.GetNextWord(bNumber);
+ if (!bNumber) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ m_LastXRefOffset = (FX_FILESIZE)FXSYS_atoi64(xrefpos_str);
+ if (!LoadAllCrossRefV4(m_LastXRefOffset) && !LoadAllCrossRefV5(m_LastXRefOffset)) {
+ if (!RebuildCrossRef()) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ bXRefRebuilt = TRUE;
+ m_LastXRefOffset = 0;
+ }
+ } else {
+ if (!RebuildCrossRef()) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ bXRefRebuilt = TRUE;
+ }
+ FX_DWORD dwRet = SetEncryptHandler();
+ if (dwRet != PDFPARSE_ERROR_SUCCESS) {
+ return dwRet;
+ }
+ m_pDocument->LoadDoc();
+ if (m_pDocument->GetRoot() == NULL || m_pDocument->GetPageCount() == 0) {
+ if (bXRefRebuilt) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ ReleaseEncryptHandler();
+ if (!RebuildCrossRef()) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ dwRet = SetEncryptHandler();
+ if (dwRet != PDFPARSE_ERROR_SUCCESS) {
+ return dwRet;
+ }
+ m_pDocument->LoadDoc();
+ if (m_pDocument->GetRoot() == NULL) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ }
+ FXSYS_qsort(m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ FX_DWORD RootObjNum = GetRootObjNum();
+ if (RootObjNum == 0) {
+ ReleaseEncryptHandler();
+ RebuildCrossRef();
+ RootObjNum = GetRootObjNum();
+ if (RootObjNum == 0) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ dwRet = SetEncryptHandler();
+ if (dwRet != PDFPARSE_ERROR_SUCCESS) {
+ return dwRet;
+ }
+ }
+ if (m_pSecurityHandler && !m_pSecurityHandler->IsMetadataEncrypted()) {
+ CPDF_Reference* pMetadata = (CPDF_Reference*)m_pDocument->GetRoot()->GetElement(FX_BSTRC("Metadata"));
+ if (pMetadata && pMetadata->GetType() == PDFOBJ_REFERENCE) {
+ m_Syntax.m_MetadataObjnum = pMetadata->GetRefObjNum();
+ }
+ }
+ return PDFPARSE_ERROR_SUCCESS;
+}
+FX_DWORD CPDF_Parser::SetEncryptHandler()
+{
+ ReleaseEncryptHandler();
+ SetEncryptDictionary(NULL);
+ if (m_pTrailer == NULL) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ CPDF_Object* pEncryptObj = m_pTrailer->GetElement(FX_BSTRC("Encrypt"));
+ if (pEncryptObj) {
+ if (pEncryptObj->GetType() == PDFOBJ_DICTIONARY) {
+ SetEncryptDictionary((CPDF_Dictionary*)pEncryptObj);
+ } else if (pEncryptObj->GetType() == PDFOBJ_REFERENCE) {
+ pEncryptObj = m_pDocument->GetIndirectObject(((CPDF_Reference*)pEncryptObj)->GetRefObjNum());
+ if (pEncryptObj) {
+ SetEncryptDictionary(pEncryptObj->GetDict());
+ }
+ }
+ }
+ if (m_bForceUseSecurityHandler) {
+ FX_DWORD err = PDFPARSE_ERROR_HANDLER;
+ if (m_pSecurityHandler == NULL) {
+ return PDFPARSE_ERROR_HANDLER;
+ }
+ if (!m_pSecurityHandler->OnInit(this, m_pEncryptDict)) {
+ return err;
+ }
+ CPDF_CryptoHandler* pCryptoHandler = m_pSecurityHandler->CreateCryptoHandler();
+ if (!pCryptoHandler->Init(m_pEncryptDict, m_pSecurityHandler)) {
+ delete pCryptoHandler;
+ pCryptoHandler = NULL;
+ return PDFPARSE_ERROR_HANDLER;
+ }
+ m_Syntax.SetEncrypt(pCryptoHandler);
+ } else if (m_pEncryptDict) {
+ CFX_ByteString filter = m_pEncryptDict->GetString(FX_BSTRC("Filter"));
+ CPDF_SecurityHandler* pSecurityHandler = NULL;
+ FX_DWORD err = PDFPARSE_ERROR_HANDLER;
+ if (filter == FX_BSTRC("Standard")) {
+ pSecurityHandler = FPDF_CreateStandardSecurityHandler();
+ err = PDFPARSE_ERROR_PASSWORD;
+ }
+ if (pSecurityHandler == NULL) {
+ return PDFPARSE_ERROR_HANDLER;
+ }
+ if (!pSecurityHandler->OnInit(this, m_pEncryptDict)) {
+ delete pSecurityHandler;
+ pSecurityHandler = NULL;
+ return err;
+ }
+ m_pSecurityHandler = pSecurityHandler;
+ CPDF_CryptoHandler* pCryptoHandler = pSecurityHandler->CreateCryptoHandler();
+ if (!pCryptoHandler->Init(m_pEncryptDict, m_pSecurityHandler)) {
+ delete pCryptoHandler;
+ pCryptoHandler = NULL;
+ return PDFPARSE_ERROR_HANDLER;
+ }
+ m_Syntax.SetEncrypt(pCryptoHandler);
+ }
+ return PDFPARSE_ERROR_SUCCESS;
+}
+void CPDF_Parser::ReleaseEncryptHandler()
+{
+ if (m_Syntax.m_pCryptoHandler) {
+ delete m_Syntax.m_pCryptoHandler;
+ m_Syntax.m_pCryptoHandler = NULL;
+ }
+ if (m_pSecurityHandler && !m_bForceUseSecurityHandler) {
+ delete m_pSecurityHandler;
+ m_pSecurityHandler = NULL;
+ }
+}
+FX_FILESIZE CPDF_Parser::GetObjectOffset(FX_DWORD objnum)
+{
+ if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) {
+ return 0;
+ }
+ if (m_V5Type[objnum] == 1) {
+ return m_CrossRef[objnum];
+ }
+ if (m_V5Type[objnum] == 2) {
+ return m_CrossRef[(FX_INT32)m_CrossRef[objnum]];
+ }
+ return 0;
+}
+static FX_INT32 GetDirectInteger(CPDF_Dictionary* pDict, FX_BSTR key)
+{
+ CPDF_Object* pObj = pDict->GetElement(key);
+ if (pObj == NULL) {
+ return 0;
+ }
+ if (pObj->GetType() == PDFOBJ_NUMBER) {
+ return ((CPDF_Number*)pObj)->GetInteger();
+ }
+ return 0;
+}
+static FX_BOOL CheckDirectType(CPDF_Dictionary* pDict, FX_BSTR key, FX_INT32 iType)
+{
+ CPDF_Object* pObj = pDict->GetElement(key);
+ if (!pObj) {
+ return TRUE;
+ }
+ return pObj->GetType() == iType;
+}
+FX_BOOL CPDF_Parser::LoadAllCrossRefV4(FX_FILESIZE xrefpos)
+{
+ if (!LoadCrossRefV4(xrefpos, 0, TRUE, FALSE)) {
+ return FALSE;
+ }
+ m_pTrailer = LoadTrailerV4();
+ if (m_pTrailer == NULL) {
+ return FALSE;
+ }
+ FX_INT32 xrefsize = GetDirectInteger(m_pTrailer, FX_BSTRC("Size"));
+ if (xrefsize <= 0 || xrefsize > (1 << 20)) {
+ return FALSE;
+ }
+ m_CrossRef.SetSize(xrefsize);
+ m_V5Type.SetSize(xrefsize);
+ CFX_FileSizeArray CrossRefList, XRefStreamList;
+ CrossRefList.Add(xrefpos);
+ XRefStreamList.Add(GetDirectInteger(m_pTrailer, FX_BSTRC("XRefStm")));
+ if (!CheckDirectType(m_pTrailer, FX_BSTRC("Prev"), PDFOBJ_NUMBER)) {
+ return FALSE;
+ }
+ FX_FILESIZE newxrefpos = GetDirectInteger(m_pTrailer, FX_BSTRC("Prev"));
+ if (newxrefpos == xrefpos) {
+ return FALSE;
+ }
+ xrefpos = newxrefpos;
+ while (xrefpos) {
+ CrossRefList.InsertAt(0, xrefpos);
+ LoadCrossRefV4(xrefpos, 0, TRUE, FALSE);
+ CPDF_Dictionary* pDict = LoadTrailerV4();
+ if (pDict == NULL) {
+ return FALSE;
+ }
+ if (!CheckDirectType(pDict, FX_BSTRC("Prev"), PDFOBJ_NUMBER)) {
+ pDict->Release();
+ return FALSE;
+ }
+ newxrefpos = GetDirectInteger(pDict, FX_BSTRC("Prev"));
+ if (newxrefpos == xrefpos) {
+ pDict->Release();
+ return FALSE;
+ }
+ xrefpos = newxrefpos;
+ XRefStreamList.InsertAt(0, pDict->GetInteger(FX_BSTRC("XRefStm")));
+ m_Trailers.Add(pDict);
+ }
+ for (FX_INT32 i = 0; i < CrossRefList.GetSize(); i ++)
+ if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE, i == 0)) {
+ return FALSE;
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV4(FX_FILESIZE xrefpos, FX_DWORD dwObjCount)
+{
+ if (!LoadLinearizedCrossRefV4(xrefpos, dwObjCount)) {
+ return FALSE;
+ }
+ m_pTrailer = LoadTrailerV4();
+ if (m_pTrailer == NULL) {
+ return FALSE;
+ }
+ FX_INT32 xrefsize = GetDirectInteger(m_pTrailer, FX_BSTRC("Size"));
+ if (xrefsize == 0) {
+ return FALSE;
+ }
+ CFX_FileSizeArray CrossRefList, XRefStreamList;
+ CrossRefList.Add(xrefpos);
+ XRefStreamList.Add(GetDirectInteger(m_pTrailer, FX_BSTRC("XRefStm")));
+ xrefpos = GetDirectInteger(m_pTrailer, FX_BSTRC("Prev"));
+ while (xrefpos) {
+ CrossRefList.InsertAt(0, xrefpos);
+ LoadCrossRefV4(xrefpos, 0, TRUE, FALSE);
+ CPDF_Dictionary* pDict = LoadTrailerV4();
+ if (pDict == NULL) {
+ return FALSE;
+ }
+ xrefpos = GetDirectInteger(pDict, FX_BSTRC("Prev"));
+ XRefStreamList.InsertAt(0, pDict->GetInteger(FX_BSTRC("XRefStm")));
+ m_Trailers.Add(pDict);
+ }
+ for (FX_INT32 i = 1; i < CrossRefList.GetSize(); i ++)
+ if (!LoadCrossRefV4(CrossRefList[i], XRefStreamList[i], FALSE, i == 0)) {
+ 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);
+ FX_LPVOID pResult = FXSYS_bsearch(&pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(pos);
+ }
+ FX_DWORD start_objnum = 0;
+ FX_DWORD count = dwObjCount;
+ FX_FILESIZE SavedPos = m_Syntax.SavePos();
+ FX_INT32 recordsize = 20;
+ char* pBuf = FX_Alloc(char, 1024 * recordsize + 1);
+ pBuf[1024 * recordsize] = '\0';
+ FX_INT32 nBlocks = count / 1024 + 1;
+ for (FX_INT32 block = 0; block < nBlocks; block ++) {
+ FX_INT32 block_size = block == nBlocks - 1 ? count % 1024 : 1024;
+ FX_DWORD dwReadSize = block_size * recordsize;
+ if ((FX_FILESIZE)(dwStartPos + dwReadSize) > m_Syntax.m_FileLen) {
+ FX_Free(pBuf);
+ return FALSE;
+ }
+ if (!m_Syntax.ReadBlock((FX_LPBYTE)pBuf, dwReadSize)) {
+ FX_Free(pBuf);
+ return FALSE;
+ }
+ for (FX_INT32 i = 0; i < block_size; i ++) {
+ FX_DWORD objnum = start_objnum + block * 1024 + i;
+ char* pEntry = pBuf + i * recordsize;
+ if (pEntry[17] == 'f') {
+ m_CrossRef.SetAtGrow(objnum, 0);
+ m_V5Type.SetAtGrow(objnum, 0);
+ } else {
+ FX_INT32 offset = FXSYS_atoi(pEntry);
+ if (offset == 0) {
+ for (FX_INT32 c = 0; c < 10; c ++) {
+ if (pEntry[c] < '0' || pEntry[c] > '9') {
+ FX_Free(pBuf);
+ return FALSE;
+ }
+ }
+ }
+ m_CrossRef.SetAtGrow(objnum, offset);
+ FX_INT32 version = FXSYS_atoi(pEntry + 11);
+ if (version >= 1) {
+ m_bVersionUpdated = TRUE;
+ }
+ m_ObjVersion.SetAtGrow(objnum, version);
+ if (m_CrossRef[objnum] < m_Syntax.m_FileLen) {
+ FX_LPVOID pResult = FXSYS_bsearch(&m_CrossRef[objnum], m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(m_CrossRef[objnum]);
+ }
+ }
+ m_V5Type.SetAtGrow(objnum, 1);
+ }
+ }
+ }
+ FX_Free(pBuf);
+ m_Syntax.RestorePos(SavedPos + count * recordsize);
+ return TRUE;
+}
+FX_BOOL CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos, FX_FILESIZE streampos, FX_BOOL bSkip, FX_BOOL bFirst)
+{
+ m_Syntax.RestorePos(pos);
+ if (m_Syntax.GetKeyword() != FX_BSTRC("xref")) {
+ return FALSE;
+ }
+ FX_LPVOID pResult = FXSYS_bsearch(&pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(pos);
+ }
+ if (streampos) {
+ FX_LPVOID pResult = FXSYS_bsearch(&streampos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(streampos);
+ }
+ }
+ while (1) {
+ FX_FILESIZE SavedPos = m_Syntax.SavePos();
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber);
+ if (word.IsEmpty()) {
+ return FALSE;
+ }
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ break;
+ }
+ FX_DWORD start_objnum = FXSYS_atoi(word);
+ if (start_objnum >= (1 << 20)) {
+ return FALSE;
+ }
+ FX_DWORD count = m_Syntax.GetDirectNum();
+ m_Syntax.ToNextWord();
+ SavedPos = m_Syntax.SavePos();
+ FX_BOOL bFirstItem = FALSE;
+ FX_INT32 recordsize = 20;
+ if (bFirst) {
+ bFirstItem = TRUE;
+ }
+ m_dwXrefStartObjNum = start_objnum;
+ if (!bSkip) {
+ char* pBuf = FX_Alloc(char, 1024 * recordsize + 1);
+ pBuf[1024 * recordsize] = '\0';
+ FX_INT32 nBlocks = count / 1024 + 1;
+ FX_BOOL bFirstBlock = TRUE;
+ for (FX_INT32 block = 0; block < nBlocks; block ++) {
+ FX_INT32 block_size = block == nBlocks - 1 ? count % 1024 : 1024;
+ m_Syntax.ReadBlock((FX_LPBYTE)pBuf, block_size * recordsize);
+ for (FX_INT32 i = 0; i < block_size; i ++) {
+ FX_DWORD objnum = start_objnum + block * 1024 + i;
+ char* pEntry = pBuf + i * recordsize;
+ if (pEntry[17] == 'f') {
+ if (bFirstItem) {
+ objnum = 0;
+ bFirstItem = FALSE;
+ }
+ if (bFirstBlock) {
+ FX_FILESIZE offset = (FX_FILESIZE)FXSYS_atoi64(pEntry);
+ FX_INT32 version = FXSYS_atoi(pEntry + 11);
+ if (offset == 0 && version == 65535 && start_objnum != 0) {
+ start_objnum--;
+ objnum = 0;
+ }
+ }
+ m_CrossRef.SetAtGrow(objnum, 0);
+ m_V5Type.SetAtGrow(objnum, 0);
+ } else {
+ FX_FILESIZE offset = (FX_FILESIZE)FXSYS_atoi64(pEntry);
+ if (offset == 0) {
+ for (FX_INT32 c = 0; c < 10; c ++) {
+ if (pEntry[c] < '0' || pEntry[c] > '9') {
+ FX_Free(pBuf);
+ return FALSE;
+ }
+ }
+ }
+ m_CrossRef.SetAtGrow(objnum, offset);
+ FX_INT32 version = FXSYS_atoi(pEntry + 11);
+ if (version >= 1) {
+ m_bVersionUpdated = TRUE;
+ }
+ m_ObjVersion.SetAtGrow(objnum, version);
+ if (m_CrossRef[objnum] < m_Syntax.m_FileLen) {
+ FX_LPVOID pResult = FXSYS_bsearch(&m_CrossRef[objnum], m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(m_CrossRef[objnum]);
+ }
+ }
+ m_V5Type.SetAtGrow(objnum, 1);
+ }
+ if (bFirstBlock) {
+ bFirstBlock = FALSE;
+ }
+ }
+ }
+ FX_Free(pBuf);
+ }
+ m_Syntax.RestorePos(SavedPos + count * recordsize);
+ }
+ if (streampos)
+ if (!LoadCrossRefV5(streampos, streampos, FALSE)) {
+ return FALSE;
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_Parser::LoadAllCrossRefV5(FX_FILESIZE xrefpos)
+{
+ if (!LoadCrossRefV5(xrefpos, xrefpos, TRUE)) {
+ return FALSE;
+ }
+ while (xrefpos)
+ if (!LoadCrossRefV5(xrefpos, xrefpos, FALSE)) {
+ return FALSE;
+ }
+ m_ObjectStreamMap.InitHashTable(101, FALSE);
+ m_bXRefStream = TRUE;
+ return TRUE;
+}
+FX_BOOL CPDF_Parser::RebuildCrossRef()
+{
+ m_CrossRef.RemoveAll();
+ m_V5Type.RemoveAll();
+ m_SortedOffset.RemoveAll();
+ m_ObjVersion.RemoveAll();
+ if (m_pTrailer) {
+ m_pTrailer->Release();
+ m_pTrailer = NULL;
+ }
+ FX_INT32 status = 0;
+ FX_INT32 inside_index = 0;
+ FX_DWORD objnum, gennum;
+ FX_INT32 depth = 0;
+ FX_LPBYTE buffer = FX_Alloc(FX_BYTE, 4096);
+ FX_FILESIZE pos = m_Syntax.m_HeaderOffset;
+ FX_FILESIZE start_pos, start_pos1;
+ FX_FILESIZE last_obj = -1, last_xref = -1, last_trailer = -1;
+ FX_BOOL bInUpdate = FALSE;
+ while (pos < m_Syntax.m_FileLen) {
+ FX_BOOL bOverFlow = FALSE;
+ FX_DWORD size = (FX_DWORD)(m_Syntax.m_FileLen - pos);
+ if (size > 4096) {
+ size = 4096;
+ }
+ if (!m_Syntax.m_pFileAccess->ReadBlock(buffer, pos, size)) {
+ break;
+ }
+ for (FX_DWORD i = 0; i < size; i ++) {
+ FX_BYTE byte = buffer[i];
+ FX_LPBYTE pData = buffer + i;
+ switch (status) {
+ case 0:
+ if (_PDF_CharType[byte] == 'W') {
+ status = 1;
+ }
+ if (byte <= '9' && byte >= '0') {
+ --i;
+ status = 1;
+ }
+ if (byte == '%') {
+ inside_index = 0;
+ status = 9;
+ }
+ if (byte == '(') {
+ status = 10;
+ depth = 1;
+ }
+ if (byte == '<') {
+ inside_index = 1;
+ status = 11;
+ }
+ if (byte == '\\') {
+ status = 13;
+ }
+ if (byte == 't') {
+ status = 7;
+ inside_index = 1;
+ }
+ break;
+ case 1:
+ if (_PDF_CharType[byte] == 'W') {
+ break;
+ } else if (byte <= '9' && byte >= '0') {
+ start_pos = pos + i;
+ status = 2;
+ objnum = byte - '0';
+ } else if (byte == 't') {
+ status = 7;
+ inside_index = 1;
+ } else if (byte == 'x') {
+ status = 8;
+ inside_index = 1;
+ } else {
+ --i;
+ status = 0;
+ }
+ break;
+ case 2:
+ if (byte <= '9' && byte >= '0') {
+ objnum = objnum * 10 + byte - '0';
+ break;
+ } else if (_PDF_CharType[byte] == 'W') {
+ status = 3;
+ } else {
+ --i;
+ status = 14;
+ inside_index = 0;
+ }
+ break;
+ case 3:
+ if (byte <= '9' && byte >= '0') {
+ start_pos1 = pos + i;
+ status = 4;
+ gennum = byte - '0';
+ } else if (_PDF_CharType[byte] == 'W') {
+ break;
+ } else if (byte == 't') {
+ status = 7;
+ inside_index = 1;
+ } else {
+ --i;
+ status = 0;
+ }
+ break;
+ case 4:
+ if (byte <= '9' && byte >= '0') {
+ gennum = gennum * 10 + byte - '0';
+ break;
+ } else if (_PDF_CharType[byte] == 'W') {
+ status = 5;
+ } else {
+ --i;
+ status = 0;
+ }
+ break;
+ case 5:
+ if (byte == 'o') {
+ status = 6;
+ inside_index = 1;
+ } else if (_PDF_CharType[byte] == 'W') {
+ break;
+ } else if (byte <= '9' && byte >= '0') {
+ objnum = gennum;
+ gennum = byte - '0';
+ start_pos = start_pos1;
+ start_pos1 = pos + i;
+ status = 4;
+ } else if (byte == 't') {
+ status = 7;
+ inside_index = 1;
+ } else {
+ --i;
+ status = 0;
+ }
+ break;
+ case 6:
+ switch (inside_index) {
+ case 1:
+ if (byte != 'b') {
+ --i;
+ status = 0;
+ } else {
+ inside_index ++;
+ }
+ break;
+ case 2:
+ if (byte != 'j') {
+ --i;
+ status = 0;
+ } else {
+ inside_index ++;
+ }
+ break;
+ case 3:
+ if (_PDF_CharType[byte] == 'W' || _PDF_CharType[byte] == 'D') {
+ if (objnum > 0x1000000) {
+ status = 0;
+ break;
+ }
+ FX_FILESIZE obj_pos = start_pos - m_Syntax.m_HeaderOffset;
+ last_obj = start_pos;
+ FX_LPVOID pResult = FXSYS_bsearch(&obj_pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(obj_pos);
+ }
+ FX_FILESIZE obj_end = 0;
+ CPDF_Object *pObject = ParseIndirectObjectAtByStrict(m_pDocument, obj_pos, objnum, NULL, &obj_end);
+ if (pObject) {
+ int iType = pObject->GetType();
+ if (iType == PDFOBJ_STREAM) {
+ CPDF_Stream* pStream = (CPDF_Stream*)pObject;
+ CPDF_Dictionary* pDict = pStream->GetDict();
+ if (pDict) {
+ if (pDict->KeyExist(FX_BSTRC("Type"))) {
+ CFX_ByteString bsValue = pDict->GetString(FX_BSTRC("Type"));
+ if (bsValue == FX_BSTRC("XRef") && pDict->KeyExist(FX_BSTRC("Size"))) {
+ CPDF_Object* pRoot = pDict->GetElement(FX_BSTRC("Root"));
+ if (pRoot && pRoot->GetDict() && pRoot->GetDict()->GetElement(FX_BSTRC("Pages"))) {
+ if (m_pTrailer) {
+ m_pTrailer->Release();
+ }
+ m_pTrailer = (CPDF_Dictionary*)pDict->Clone();
+ }
+ }
+ }
+ }
+ }
+ }
+ FX_FILESIZE offset = 0;
+ m_Syntax.RestorePos(obj_pos);
+ offset = m_Syntax.FindTag(FX_BSTRC("obj"), 0);
+ if (offset == -1) {
+ offset = 0;
+ } else {
+ offset += 3;
+ }
+ FX_FILESIZE nLen = obj_end - obj_pos - offset;
+ if ((FX_DWORD)nLen > size - i) {
+ pos = obj_end + m_Syntax.m_HeaderOffset;
+ bOverFlow = TRUE;
+ } else {
+ i += (FX_DWORD)nLen;
+ }
+ if (m_CrossRef.GetSize() > (FX_INT32)objnum && m_CrossRef[objnum]) {
+ if (pObject) {
+ FX_DWORD oldgen = m_ObjVersion.GetAt(objnum);
+ m_CrossRef[objnum] = obj_pos;
+ m_ObjVersion.SetAt(objnum, (FX_SHORT)gennum);
+ if (oldgen != gennum) {
+ m_bVersionUpdated = TRUE;
+ }
+ }
+ } else {
+ m_CrossRef.SetAtGrow(objnum, obj_pos);
+ m_V5Type.SetAtGrow(objnum, 1);
+ m_ObjVersion.SetAtGrow(objnum, (FX_SHORT)gennum);
+ }
+ if (pObject) {
+ pObject->Release();
+ }
+ }
+ --i;
+ status = 0;
+ break;
+ }
+ break;
+ case 7:
+ if (inside_index == 7) {
+ if (_PDF_CharType[byte] == 'W' || _PDF_CharType[byte] == 'D') {
+ last_trailer = pos + i - 7;
+ m_Syntax.RestorePos(pos + i - m_Syntax.m_HeaderOffset);
+ CPDF_Object* pObj = m_Syntax.GetObject(m_pDocument, 0, 0, 0);
+ if (pObj) {
+ if (pObj->GetType() != PDFOBJ_DICTIONARY && pObj->GetType() != PDFOBJ_STREAM) {
+ pObj->Release();
+ } else {
+ CPDF_Dictionary* pTrailer = NULL;
+ if (pObj->GetType() == PDFOBJ_STREAM) {
+ pTrailer = ((CPDF_Stream*)pObj)->GetDict();
+ } else {
+ pTrailer = (CPDF_Dictionary*)pObj;
+ }
+ if (pTrailer) {
+ if (m_pTrailer) {
+ CPDF_Object* pRoot = pTrailer->GetElement(FX_BSTRC("Root"));
+ if (pRoot == NULL || (pRoot->GetType() == PDFOBJ_REFERENCE &&
+ (FX_DWORD)m_CrossRef.GetSize() > ((CPDF_Reference*)pRoot)->GetRefObjNum() &&
+ m_CrossRef.GetAt(((CPDF_Reference*)pRoot)->GetRefObjNum()) != 0)) {
+ FX_POSITION pos = pTrailer->GetStartPos();
+ while (pos) {
+ CFX_ByteString key;
+ CPDF_Object* pObj = pTrailer->GetNextElement(pos, key);
+ m_pTrailer->SetAt(key, pObj->Clone(), m_pDocument);
+ }
+ pObj->Release();
+ } else {
+ pObj->Release();
+ }
+ } else {
+ if (pObj->GetType() == PDFOBJ_STREAM) {
+ m_pTrailer = (CPDF_Dictionary*)pTrailer->Clone();
+ pObj->Release();
+ } else {
+ m_pTrailer = pTrailer;
+ }
+ FX_FILESIZE dwSavePos = m_Syntax.SavePos();
+ CFX_ByteString strWord = m_Syntax.GetKeyword();
+ if (!strWord.Compare(FX_BSTRC("startxref"))) {
+ FX_BOOL bNumber = FALSE;
+ CFX_ByteString bsOffset = m_Syntax.GetNextWord(bNumber);
+ if (bNumber) {
+ m_LastXRefOffset = FXSYS_atoi(bsOffset);
+ }
+ }
+ m_Syntax.RestorePos(dwSavePos);
+ }
+ } else {
+ pObj->Release();
+ }
+ bInUpdate = TRUE;
+ }
+ }
+ }
+ --i;
+ status = 0;
+ } else if (byte == "trailer"[inside_index]) {
+ inside_index ++;
+ } else {
+ --i;
+ status = 0;
+ }
+ break;
+ case 8:
+ if (inside_index == 4) {
+ last_xref = pos + i - 4;
+ status = 1;
+ } else if (byte == "xref"[inside_index]) {
+ inside_index ++;
+ } else {
+ --i;
+ status = 0;
+ }
+ break;
+ case 9:
+ if (byte == '\r' || byte == '\n') {
+ status = 0;
+ }
+ break;
+ case 10:
+ if (byte == ')') {
+ if (depth > 0) {
+ depth--;
+ }
+ } else if (byte == '(') {
+ depth++;
+ }
+ if (!depth) {
+ status = 0;
+ }
+ break;
+ case 11:
+ if (byte == '<' && inside_index == 1) {
+ status = 12;
+ } else if (byte == '>') {
+ status = 0;
+ }
+ inside_index = 0;
+ break;
+ case 12:
+ --i;
+ status = 0;
+ break;
+ case 13:
+ if (_PDF_CharType[byte] == 'D' || _PDF_CharType[byte] == 'W') {
+ --i;
+ status = 0;
+ }
+ break;
+ case 14:
+ if (_PDF_CharType[byte] == 'W') {
+ status = 0;
+ } else if (byte == '%' || byte == '(' || byte == '<' || byte == '\\') {
+ status = 0;
+ --i;
+ } else if (inside_index == 6) {
+ status = 0;
+ --i;
+ } else if (byte == "endobj"[inside_index]) {
+ inside_index++;
+ }
+ break;
+ }
+ if (bOverFlow) {
+ size = 0;
+ break;
+ }
+ }
+ pos += size;
+ }
+ if (last_xref != -1 && last_xref > last_obj) {
+ last_trailer = last_xref;
+ } else if (last_trailer == -1 || last_xref < last_obj) {
+ last_trailer = m_Syntax.m_FileLen;
+ }
+ FX_FILESIZE offset = last_trailer - m_Syntax.m_HeaderOffset;
+ FX_LPVOID pResult = FXSYS_bsearch(&offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(offset);
+ }
+ FX_Free(buffer);
+ return TRUE;
+}
+static FX_DWORD _GetVarInt(FX_LPCBYTE p, FX_INT32 n)
+{
+ FX_DWORD result = 0;
+ for (FX_INT32 i = 0; i < n; i ++) {
+ result = result * 256 + p[i];
+ }
+ return result;
+}
+FX_BOOL CPDF_Parser::LoadCrossRefV5(FX_FILESIZE pos, FX_FILESIZE& prev, FX_BOOL bMainXRef)
+{
+ CPDF_Stream* pStream = (CPDF_Stream*)ParseIndirectObjectAt(m_pDocument, pos, 0, NULL);
+ if (!pStream) {
+ return FALSE;
+ }
+ if (m_pDocument) {
+ m_pDocument->InsertIndirectObject(pStream->m_ObjNum, pStream);
+ }
+ if (pStream->GetType() != PDFOBJ_STREAM) {
+ return FALSE;
+ }
+ prev = pStream->GetDict()->GetInteger(FX_BSTRC("Prev"));
+ FX_INT32 size = pStream->GetDict()->GetInteger(FX_BSTRC("Size"));
+ if (size < 0) {
+ pStream->Release();
+ return FALSE;
+ }
+ if (bMainXRef) {
+ m_pTrailer = (CPDF_Dictionary*)pStream->GetDict()->Clone();
+ m_CrossRef.SetSize(size);
+ if (m_V5Type.SetSize(size)) {
+ FXSYS_memset32(m_V5Type.GetData(), 0, size);
+ }
+ } else {
+ m_Trailers.Add((CPDF_Dictionary*)pStream->GetDict()->Clone());
+ }
+ CFX_DWordArray IndexArray, WidthArray;
+ FX_DWORD nSegs = 0;
+ CPDF_Array* pArray = pStream->GetDict()->GetArray(FX_BSTRC("Index"));
+ if (pArray == NULL) {
+ IndexArray.Add(0);
+ IndexArray.Add(size);
+ nSegs = 1;
+ } else {
+ for (FX_DWORD i = 0; i < pArray->GetCount(); i ++) {
+ IndexArray.Add(pArray->GetInteger(i));
+ }
+ nSegs = pArray->GetCount() / 2;
+ }
+ pArray = pStream->GetDict()->GetArray(FX_BSTRC("W"));
+ if (pArray == NULL) {
+ pStream->Release();
+ return FALSE;
+ }
+ FX_DWORD totalwidth = 0;
+ FX_DWORD i;
+ for (i = 0; i < pArray->GetCount(); i ++) {
+ WidthArray.Add(pArray->GetInteger(i));
+ if (totalwidth + WidthArray[i] < totalwidth) {
+ pStream->Release();
+ return FALSE;
+ }
+ totalwidth += WidthArray[i];
+ }
+ if (totalwidth == 0 || WidthArray.GetSize() < 3) {
+ pStream->Release();
+ return FALSE;
+ }
+ CPDF_StreamAcc acc;
+ acc.LoadAllData(pStream);
+ FX_LPCBYTE pData = acc.GetData();
+ FX_DWORD dwTotalSize = acc.GetSize();
+ FX_DWORD segindex = 0;
+ for (i = 0; i < nSegs; i ++) {
+ FX_INT32 startnum = IndexArray[i * 2];
+ if (startnum < 0) {
+ continue;
+ }
+ m_dwXrefStartObjNum = startnum;
+ FX_DWORD count = IndexArray[i * 2 + 1];
+ if (segindex + count < segindex || segindex + count == 0 ||
+ (FX_DWORD)totalwidth >= UINT_MAX / (segindex + count) || (segindex + count) * (FX_DWORD)totalwidth > dwTotalSize) {
+ continue;
+ }
+ FX_LPCBYTE segstart = pData + segindex * (FX_DWORD)totalwidth;
+ if ((FX_DWORD)startnum + count < (FX_DWORD)startnum ||
+ (FX_DWORD)startnum + count > (FX_DWORD)m_V5Type.GetSize()) {
+ continue;
+ }
+ for (FX_DWORD j = 0; j < count; j ++) {
+ FX_INT32 type = 1;
+ FX_LPCBYTE entrystart = segstart + j * totalwidth;
+ if (WidthArray[0]) {
+ type = _GetVarInt(entrystart, WidthArray[0]);
+ }
+ if (m_V5Type[startnum + j] == 255) {
+ FX_FILESIZE offset = _GetVarInt(entrystart + WidthArray[0], WidthArray[1]);
+ m_CrossRef[startnum + j] = offset;
+ FX_LPVOID pResult = FXSYS_bsearch(&offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(offset);
+ }
+ continue;
+ }
+ if (m_V5Type[startnum + j]) {
+ continue;
+ }
+ m_V5Type[startnum + j] = type;
+ if (type == 0) {
+ m_CrossRef[startnum + j] = 0;
+ } else {
+ FX_FILESIZE offset = _GetVarInt(entrystart + WidthArray[0], WidthArray[1]);
+ m_CrossRef[startnum + j] = offset;
+ if (type == 1) {
+ FX_LPVOID pResult = FXSYS_bsearch(&offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_SortedOffset.Add(offset);
+ }
+ } else {
+ if (offset < 0 || offset >= m_V5Type.GetSize()) {
+ pStream->Release();
+ return FALSE;
+ }
+ m_V5Type[offset] = 255;
+ }
+ }
+ }
+ segindex += count;
+ }
+ pStream->Release();
+ return TRUE;
+}
+CPDF_Array* CPDF_Parser::GetIDArray()
+{
+ CPDF_Object* pID = m_pTrailer->GetElement(FX_BSTRC("ID"));
+ if (pID == NULL) {
+ return NULL;
+ }
+ if (pID->GetType() == PDFOBJ_REFERENCE) {
+ pID = ParseIndirectObject(NULL, ((CPDF_Reference*)pID)->GetRefObjNum());
+ m_pTrailer->SetAt(FX_BSTRC("ID"), pID);
+ }
+ if (pID == NULL || pID->GetType() != PDFOBJ_ARRAY) {
+ return NULL;
+ }
+ return (CPDF_Array*)pID;
+}
+FX_DWORD CPDF_Parser::GetRootObjNum()
+{
+ CPDF_Reference* pRef = (CPDF_Reference*)m_pTrailer->GetElement(FX_BSTRC("Root"));
+ if (pRef == NULL || pRef->GetType() != PDFOBJ_REFERENCE) {
+ return 0;
+ }
+ return pRef->GetRefObjNum();
+}
+FX_DWORD CPDF_Parser::GetInfoObjNum()
+{
+ CPDF_Reference* pRef = (CPDF_Reference*)m_pTrailer->GetElement(FX_BSTRC("Info"));
+ if (pRef == NULL || pRef->GetType() != PDFOBJ_REFERENCE) {
+ return 0;
+ }
+ return pRef->GetRefObjNum();
+}
+FX_BOOL CPDF_Parser::IsFormStream(FX_DWORD objnum, FX_BOOL& bForm)
+{
+ bForm = FALSE;
+ if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) {
+ return TRUE;
+ }
+ if (m_V5Type[objnum] == 0) {
+ return TRUE;
+ }
+ if (m_V5Type[objnum] == 2) {
+ return TRUE;
+ }
+ FX_FILESIZE pos = m_CrossRef[objnum];
+ FX_LPVOID pResult = FXSYS_bsearch(&pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ return TRUE;
+ }
+ if ((FX_FILESIZE*)pResult - (FX_FILESIZE*)m_SortedOffset.GetData() == m_SortedOffset.GetSize() - 1) {
+ return FALSE;
+ }
+ FX_FILESIZE size = ((FX_FILESIZE*)pResult)[1] - pos;
+ FX_FILESIZE SavedPos = m_Syntax.SavePos();
+ m_Syntax.RestorePos(pos);
+ bForm = m_Syntax.SearchMultiWord(FX_BSTRC("/Form\0stream"), TRUE, size) == 0;
+ m_Syntax.RestorePos(SavedPos);
+ return TRUE;
+}
+CPDF_Object* CPDF_Parser::ParseIndirectObject(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, PARSE_CONTEXT* pContext)
+{
+ if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) {
+ return NULL;
+ }
+ if (m_V5Type[objnum] == 1 || m_V5Type[objnum] == 255) {
+ FX_FILESIZE pos = m_CrossRef[objnum];
+ if (pos <= 0) {
+ return NULL;
+ }
+ return ParseIndirectObjectAt(pObjList, pos, objnum, pContext);
+ }
+ if (m_V5Type[objnum] == 2) {
+ CPDF_StreamAcc* pObjStream = GetObjectStream((FX_DWORD)m_CrossRef[objnum]);
+ if (pObjStream == NULL) {
+ return NULL;
+ }
+ FX_INT32 n = pObjStream->GetDict()->GetInteger(FX_BSTRC("N"));
+ FX_INT32 offset = pObjStream->GetDict()->GetInteger(FX_BSTRC("First"));
+ CPDF_SyntaxParser syntax;
+ CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream((FX_LPBYTE)pObjStream->GetData(), (size_t)pObjStream->GetSize(), FALSE));
+ syntax.InitParser((IFX_FileStream*)file, 0);
+ CPDF_Object* pRet = NULL;
+ while (n) {
+ FX_DWORD thisnum = syntax.GetDirectNum();
+ FX_DWORD thisoff = syntax.GetDirectNum();
+ if (thisnum == objnum) {
+ syntax.RestorePos(offset + thisoff);
+ pRet = syntax.GetObject(pObjList, 0, 0, 0, pContext);
+ break;
+ }
+ n --;
+ }
+ return pRet;
+ }
+ return NULL;
+}
+CPDF_StreamAcc* CPDF_Parser::GetObjectStream(FX_DWORD objnum)
+{
+ CPDF_StreamAcc* pStreamAcc = NULL;
+ if (m_ObjectStreamMap.Lookup((void*)(FX_UINTPTR)objnum, (void*&)pStreamAcc)) {
+ return pStreamAcc;
+ }
+ const CPDF_Stream* pStream = (CPDF_Stream*)m_pDocument->GetIndirectObject(objnum);
+ if (pStream == NULL || pStream->GetType() != PDFOBJ_STREAM) {
+ return NULL;
+ }
+ pStreamAcc = FX_NEW CPDF_StreamAcc;
+ pStreamAcc->LoadAllData(pStream);
+ m_ObjectStreamMap.SetAt((void*)(FX_UINTPTR)objnum, pStreamAcc);
+ return pStreamAcc;
+}
+FX_FILESIZE CPDF_Parser::GetObjectSize(FX_DWORD objnum)
+{
+ if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) {
+ return 0;
+ }
+ if (m_V5Type[objnum] == 2) {
+ objnum = (FX_DWORD)m_CrossRef[objnum];
+ }
+ if (m_V5Type[objnum] == 1 || m_V5Type[objnum] == 255) {
+ FX_FILESIZE offset = m_CrossRef[objnum];
+ if (offset == 0) {
+ return 0;
+ }
+ FX_LPVOID pResult = FXSYS_bsearch(&offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ return 0;
+ }
+ if ((FX_FILESIZE*)pResult - (FX_FILESIZE*)m_SortedOffset.GetData() == m_SortedOffset.GetSize() - 1) {
+ return 0;
+ }
+ return ((FX_FILESIZE*)pResult)[1] - offset;
+ }
+ return 0;
+}
+void CPDF_Parser::GetIndirectBinary(FX_DWORD objnum, FX_LPBYTE& pBuffer, FX_DWORD& size)
+{
+ pBuffer = NULL;
+ size = 0;
+ if (objnum >= (FX_DWORD)m_CrossRef.GetSize()) {
+ return;
+ }
+ if (m_V5Type[objnum] == 2) {
+ CPDF_StreamAcc* pObjStream = GetObjectStream((FX_DWORD)m_CrossRef[objnum]);
+ if (pObjStream == NULL) {
+ return;
+ }
+ FX_INT32 n = pObjStream->GetDict()->GetInteger(FX_BSTRC("N"));
+ FX_INT32 offset = pObjStream->GetDict()->GetInteger(FX_BSTRC("First"));
+ CPDF_SyntaxParser syntax;
+ FX_LPCBYTE pData = pObjStream->GetData();
+ FX_DWORD totalsize = pObjStream->GetSize();
+ CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream((FX_LPBYTE)pData, (size_t)totalsize, FALSE));
+ syntax.InitParser((IFX_FileStream*)file, 0);
+ while (n) {
+ FX_DWORD thisnum = syntax.GetDirectNum();
+ FX_DWORD thisoff = syntax.GetDirectNum();
+ if (thisnum == objnum) {
+ if (n == 1) {
+ size = totalsize - (thisoff + offset);
+ } else {
+ FX_DWORD nextnum = syntax.GetDirectNum();
+ FX_DWORD nextoff = syntax.GetDirectNum();
+ size = nextoff - thisoff;
+ }
+ pBuffer = FX_Alloc(FX_BYTE, size);
+ FXSYS_memcpy32(pBuffer, pData + thisoff + offset, size);
+ return;
+ }
+ n --;
+ }
+ return;
+ }
+ if (m_V5Type[objnum] == 1) {
+ FX_FILESIZE pos = m_CrossRef[objnum];
+ if (pos == 0) {
+ return;
+ }
+ FX_FILESIZE SavedPos = m_Syntax.SavePos();
+ m_Syntax.RestorePos(pos);
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ return;
+ }
+ FX_DWORD real_objnum = FXSYS_atoi(word);
+ if (real_objnum && real_objnum != objnum) {
+ m_Syntax.RestorePos(SavedPos);
+ return;
+ }
+ word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ return;
+ }
+ if (m_Syntax.GetKeyword() != FX_BSTRC("obj")) {
+ m_Syntax.RestorePos(SavedPos);
+ return;
+ }
+ FX_LPVOID pResult = FXSYS_bsearch(&pos, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ m_Syntax.RestorePos(SavedPos);
+ return;
+ }
+ FX_FILESIZE nextoff = ((FX_FILESIZE*)pResult)[1];
+ FX_BOOL bNextOffValid = FALSE;
+ if (nextoff != pos) {
+ m_Syntax.RestorePos(nextoff);
+ word = m_Syntax.GetNextWord(bIsNumber);
+ if (word == FX_BSTRC("xref")) {
+ bNextOffValid = TRUE;
+ } else if (bIsNumber) {
+ word = m_Syntax.GetNextWord(bIsNumber);
+ if (bIsNumber && m_Syntax.GetKeyword() == FX_BSTRC("obj")) {
+ bNextOffValid = TRUE;
+ }
+ }
+ }
+ if (!bNextOffValid) {
+ m_Syntax.RestorePos(pos);
+ while (1) {
+ if (m_Syntax.GetKeyword() == FX_BSTRC("endobj")) {
+ break;
+ }
+ if (m_Syntax.SavePos() == m_Syntax.m_FileLen) {
+ break;
+ }
+ }
+ nextoff = m_Syntax.SavePos();
+ }
+ size = (FX_DWORD)(nextoff - pos);
+ pBuffer = FX_Alloc(FX_BYTE, size);
+ m_Syntax.RestorePos(pos);
+ m_Syntax.ReadBlock(pBuffer, size);
+ m_Syntax.RestorePos(SavedPos);
+ }
+}
+CPDF_Object* CPDF_Parser::ParseIndirectObjectAt(CPDF_IndirectObjects* pObjList, FX_FILESIZE pos, FX_DWORD objnum,
+ PARSE_CONTEXT* pContext)
+{
+ FX_FILESIZE SavedPos = m_Syntax.SavePos();
+ m_Syntax.RestorePos(pos);
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ FX_FILESIZE objOffset = m_Syntax.SavePos();
+ objOffset -= word.GetLength();
+ FX_DWORD real_objnum = FXSYS_atoi(word);
+ if (objnum && real_objnum != objnum) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ FX_DWORD gennum = FXSYS_atoi(word);
+ if (m_Syntax.GetKeyword() != FX_BSTRC("obj")) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ CPDF_Object* pObj = m_Syntax.GetObject(pObjList, objnum, gennum, 0, pContext);
+ FX_FILESIZE endOffset = m_Syntax.SavePos();
+ CFX_ByteString bsWord = m_Syntax.GetKeyword();
+ if (bsWord == FX_BSTRC("endobj")) {
+ endOffset = m_Syntax.SavePos();
+ }
+ FX_DWORD objSize = endOffset - objOffset;
+ m_Syntax.RestorePos(SavedPos);
+ if (pObj && !objnum) {
+ pObj->m_ObjNum = real_objnum;
+ }
+ return pObj;
+}
+CPDF_Object* CPDF_Parser::ParseIndirectObjectAtByStrict(CPDF_IndirectObjects* pObjList, FX_FILESIZE pos, FX_DWORD objnum,
+ struct PARSE_CONTEXT* pContext, FX_FILESIZE *pResultPos)
+{
+ FX_FILESIZE SavedPos = m_Syntax.SavePos();
+ m_Syntax.RestorePos(pos);
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ FX_DWORD real_objnum = FXSYS_atoi(word);
+ if (objnum && real_objnum != objnum) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ FX_DWORD gennum = FXSYS_atoi(word);
+ if (m_Syntax.GetKeyword() != FX_BSTRC("obj")) {
+ m_Syntax.RestorePos(SavedPos);
+ return NULL;
+ }
+ CPDF_Object* pObj = m_Syntax.GetObjectByStrict(pObjList, objnum, gennum, 0, pContext);
+ if (pResultPos) {
+ *pResultPos = m_Syntax.m_Pos;
+ }
+ m_Syntax.RestorePos(SavedPos);
+ return pObj;
+}
+CPDF_Dictionary* CPDF_Parser::LoadTrailerV4()
+{
+ if (m_Syntax.GetKeyword() != FX_BSTRC("trailer")) {
+ return NULL;
+ }
+ CPDF_Object* pObj = m_Syntax.GetObject(m_pDocument, 0, 0, 0);
+ if (pObj == NULL || pObj->GetType() != PDFOBJ_DICTIONARY) {
+ if (pObj) {
+ pObj->Release();
+ }
+ return NULL;
+ }
+ return (CPDF_Dictionary*)pObj;
+}
+FX_DWORD CPDF_Parser::GetPermissions(FX_BOOL bCheckRevision)
+{
+ if (m_pSecurityHandler == NULL) {
+ return (FX_DWORD) - 1;
+ }
+ FX_DWORD dwPermission = m_pSecurityHandler->GetPermissions();
+ if (m_pEncryptDict && m_pEncryptDict->GetString(FX_BSTRC("Filter")) == FX_BSTRC("Standard")) {
+ dwPermission &= 0xFFFFFFFC;
+ dwPermission |= 0xFFFFF0C0;
+ if(bCheckRevision && m_pEncryptDict->GetInteger(FX_BSTRC("R")) == 2) {
+ dwPermission &= 0xFFFFF0FF;
+ }
+ }
+ return dwPermission;
+}
+FX_BOOL CPDF_Parser::IsOwner()
+{
+ return m_pSecurityHandler == NULL ? TRUE : m_pSecurityHandler->IsOwner();
+}
+void CPDF_Parser::SetSecurityHandler(CPDF_SecurityHandler* pSecurityHandler, FX_BOOL bForced)
+{
+ ASSERT(m_pSecurityHandler == NULL);
+ if (m_pSecurityHandler && !m_bForceUseSecurityHandler) {
+ delete m_pSecurityHandler;
+ m_pSecurityHandler = NULL;
+ }
+ m_bForceUseSecurityHandler = bForced;
+ m_pSecurityHandler = pSecurityHandler;
+ if (m_bForceUseSecurityHandler) {
+ return;
+ }
+ m_Syntax.m_pCryptoHandler = pSecurityHandler->CreateCryptoHandler();
+ m_Syntax.m_pCryptoHandler->Init(NULL, pSecurityHandler);
+}
+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();
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ return FALSE;
+ }
+ FX_DWORD objnum = FXSYS_atoi(word);
+ word = m_Syntax.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ return FALSE;
+ }
+ FX_DWORD gennum = FXSYS_atoi(word);
+ if (m_Syntax.GetKeyword() != FX_BSTRC("obj")) {
+ m_Syntax.RestorePos(SavedPos);
+ return FALSE;
+ }
+ m_pLinearized = m_Syntax.GetObject(NULL, objnum, gennum, 0);
+ if (!m_pLinearized) {
+ return FALSE;
+ }
+ if (m_pLinearized->GetDict()->GetElement(FX_BSTRC("Linearized"))) {
+ m_Syntax.GetNextWord(bIsNumber);
+ CPDF_Object *pLen = m_pLinearized->GetDict()->GetElement(FX_BSTRC("L"));
+ if (!pLen) {
+ m_pLinearized->Release();
+ return FALSE;
+ }
+ if (pLen->GetInteger() != (int)pFileAccess->GetSize()) {
+ return FALSE;
+ }
+ CPDF_Object *pNo = m_pLinearized->GetDict()->GetElement(FX_BSTRC("P"));
+ if (pNo && pNo->GetType() == PDFOBJ_NUMBER) {
+ m_dwFirstPageNo = pNo->GetInteger();
+ }
+ CPDF_Object *pTable = m_pLinearized->GetDict()->GetElement(FX_BSTRC("T"));
+ if (pTable && pTable->GetType() == PDFOBJ_NUMBER) {
+ m_LastXRefOffset = pTable->GetInteger();
+ }
+ return TRUE;
+ }
+ m_pLinearized->Release();
+ m_pLinearized = NULL;
+ return FALSE;
+}
+FX_DWORD CPDF_Parser::StartAsynParse(IFX_FileRead* pFileAccess, FX_BOOL bReParse, FX_BOOL bOwnFileRead)
+{
+ CloseParser(bReParse);
+ m_bXRefStream = FALSE;
+ m_LastXRefOffset = 0;
+ m_bOwnFileRead = bOwnFileRead;
+ FX_INT32 offset = GetHeaderOffset(pFileAccess);
+ if (offset == -1) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ if (!IsLinearizedFile(pFileAccess, offset)) {
+ m_Syntax.m_pFileAccess = NULL;
+ return StartParse(pFileAccess, bReParse, bOwnFileRead);
+ }
+ if (!bReParse) {
+ m_pDocument = FX_NEW CPDF_Document(this);
+ }
+ FX_FILESIZE dwFirstXRefOffset = m_Syntax.SavePos();
+ FX_BOOL bXRefRebuilt = FALSE;
+ FX_BOOL bLoadV4 = FALSE;
+ if (!(bLoadV4 = LoadCrossRefV4(dwFirstXRefOffset, 0, FALSE, FALSE)) && !LoadCrossRefV5(dwFirstXRefOffset, dwFirstXRefOffset, TRUE)) {
+ if (!RebuildCrossRef()) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ bXRefRebuilt = TRUE;
+ m_LastXRefOffset = 0;
+ }
+ if (bLoadV4) {
+ m_pTrailer = LoadTrailerV4();
+ if (m_pTrailer == NULL) {
+ return FALSE;
+ }
+ FX_INT32 xrefsize = GetDirectInteger(m_pTrailer, FX_BSTRC("Size"));
+ if (xrefsize == 0) {
+ return FALSE;
+ }
+ m_CrossRef.SetSize(xrefsize);
+ m_V5Type.SetSize(xrefsize);
+ }
+ FX_DWORD dwRet = SetEncryptHandler();
+ if (dwRet != PDFPARSE_ERROR_SUCCESS) {
+ return dwRet;
+ }
+ m_pDocument->LoadAsynDoc(m_pLinearized->GetDict());
+ if (m_pDocument->GetRoot() == NULL || m_pDocument->GetPageCount() == 0) {
+ if (bXRefRebuilt) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ ReleaseEncryptHandler();
+ if (!RebuildCrossRef()) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ dwRet = SetEncryptHandler();
+ if (dwRet != PDFPARSE_ERROR_SUCCESS) {
+ return dwRet;
+ }
+ m_pDocument->LoadAsynDoc(m_pLinearized->GetDict());
+ if (m_pDocument->GetRoot() == NULL) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ }
+ FXSYS_qsort(m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ FX_DWORD RootObjNum = GetRootObjNum();
+ if (RootObjNum == 0) {
+ ReleaseEncryptHandler();
+ RebuildCrossRef();
+ RootObjNum = GetRootObjNum();
+ if (RootObjNum == 0) {
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ dwRet = SetEncryptHandler();
+ if (dwRet != PDFPARSE_ERROR_SUCCESS) {
+ return dwRet;
+ }
+ }
+ if (m_pSecurityHandler && m_pSecurityHandler->IsMetadataEncrypted()) {
+ CPDF_Reference* pMetadata = (CPDF_Reference*)m_pDocument->GetRoot()->GetElement(FX_BSTRC("Metadata"));
+ if (pMetadata && pMetadata->GetType() == PDFOBJ_REFERENCE) {
+ m_Syntax.m_MetadataObjnum = pMetadata->GetRefObjNum();
+ }
+ }
+ return PDFPARSE_ERROR_SUCCESS;
+}
+FX_BOOL CPDF_Parser::LoadLinearizedAllCrossRefV5(FX_FILESIZE xrefpos)
+{
+ if (!LoadCrossRefV5(xrefpos, xrefpos, FALSE)) {
+ return FALSE;
+ }
+ while (xrefpos)
+ if (!LoadCrossRefV5(xrefpos, xrefpos, FALSE)) {
+ return FALSE;
+ }
+ m_ObjectStreamMap.InitHashTable(101, FALSE);
+ m_bXRefStream = TRUE;
+ return TRUE;
+}
+FX_DWORD CPDF_Parser::LoadLinearizedMainXRefTable()
+{
+ FX_DWORD dwSaveMetadataObjnum = m_Syntax.m_MetadataObjnum;
+ m_Syntax.m_MetadataObjnum = 0;
+ if (m_pTrailer) {
+ m_pTrailer->Release();
+ m_pTrailer = NULL;
+ }
+ m_Syntax.RestorePos(m_LastXRefOffset - m_Syntax.m_HeaderOffset);
+ FX_FILESIZE dwSavedPos = m_Syntax.SavePos();
+ FX_BYTE ch = 0;
+ FX_DWORD dwCount = 0;
+ m_Syntax.GetNextChar(ch);
+ FX_INT32 type = _PDF_CharType[ch];
+ while (type == 'W') {
+ ++dwCount;
+ if (m_Syntax.m_FileLen >= (FX_FILESIZE)(m_Syntax.SavePos() + m_Syntax.m_HeaderOffset)) {
+ break;
+ }
+ m_Syntax.GetNextChar(ch);
+ type = _PDF_CharType[ch];
+ }
+ m_LastXRefOffset += dwCount;
+ FX_POSITION pos = m_ObjectStreamMap.GetStartPosition();
+ while (pos) {
+ FX_LPVOID objnum;
+ CPDF_StreamAcc* pStream;
+ m_ObjectStreamMap.GetNextAssoc(pos, objnum, (void*&)pStream);
+ delete pStream;
+ }
+ m_ObjectStreamMap.RemoveAll();
+ if (!LoadLinearizedAllCrossRefV4(m_LastXRefOffset, m_dwXrefStartObjNum) && !LoadLinearizedAllCrossRefV5(m_LastXRefOffset)) {
+ m_LastXRefOffset = 0;
+ m_Syntax.m_MetadataObjnum = dwSaveMetadataObjnum;
+ return PDFPARSE_ERROR_FORMAT;
+ }
+ FXSYS_qsort(m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_DWORD), _CompareDWord);
+ m_Syntax.m_MetadataObjnum = dwSaveMetadataObjnum;
+ return PDFPARSE_ERROR_SUCCESS;
+}
+CPDF_SyntaxParser::CPDF_SyntaxParser()
+{
+ m_pFileAccess = NULL;
+ m_pCryptoHandler = NULL;
+ m_pFileBuf = NULL;
+ m_BufSize = CPDF_ModuleMgr::Get()->m_FileBufSize;
+ m_pFileBuf = NULL;
+ m_MetadataObjnum = 0;
+ m_dwWordPos = 0;
+#if defined(_FPDFAPI_MINI_)
+ m_bFileStream = TRUE;
+#else
+ m_bFileStream = FALSE;
+#endif
+}
+CPDF_SyntaxParser::~CPDF_SyntaxParser()
+{
+ if (m_pFileBuf) {
+ FX_Free(m_pFileBuf);
+ }
+}
+FX_BOOL CPDF_SyntaxParser::GetCharAt(FX_FILESIZE pos, FX_BYTE& ch)
+{
+ FX_FILESIZE save_pos = m_Pos;
+ m_Pos = pos;
+ FX_BOOL ret = GetNextChar(ch);
+ m_Pos = save_pos;
+ return ret;
+}
+FX_BOOL CPDF_SyntaxParser::GetNextChar(FX_BYTE& ch)
+{
+ FX_FILESIZE pos = m_Pos + m_HeaderOffset;
+ 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) {
+ 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;
+ read_size = (FX_DWORD)m_FileLen;
+ } else {
+ read_pos = m_FileLen - 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, FX_BYTE& ch)
+{
+ pos += m_HeaderOffset;
+ 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) {
+ read_pos = 0;
+ } 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) {
+ read_pos = 0;
+ read_size = (FX_DWORD)m_FileLen;
+ } else {
+ read_pos = m_FileLen - 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(FX_LPBYTE pBuf, FX_DWORD size)
+{
+ if (!m_pFileAccess->ReadBlock(pBuf, m_Pos + m_HeaderOffset, size)) {
+ return FALSE;
+ }
+ m_Pos += size;
+ return TRUE;
+}
+#define MAX_WORD_BUFFER 256
+void CPDF_SyntaxParser::GetNextWord()
+{
+ m_WordSize = 0;
+ m_bIsNumber = TRUE;
+ FX_BYTE ch;
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ FX_BYTE type = _PDF_CharType[ch];
+ while (1) {
+ while (type == 'W') {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ type = _PDF_CharType[ch];
+ }
+ if (ch != '%') {
+ break;
+ }
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ if (ch == '\r' || ch == '\n') {
+ break;
+ }
+ }
+ type = _PDF_CharType[ch];
+ }
+ if (type == 'D') {
+ m_bIsNumber = FALSE;
+ m_WordBuffer[m_WordSize++] = ch;
+ if (ch == '/') {
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ type = _PDF_CharType[ch];
+ if (type != 'R' && type != 'N') {
+ m_Pos --;
+ return;
+ }
+ if (m_WordSize < MAX_WORD_BUFFER) {
+ m_WordBuffer[m_WordSize++] = ch;
+ }
+ }
+ } else if (ch == '<') {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ if (ch == '<') {
+ m_WordBuffer[m_WordSize++] = ch;
+ } else {
+ m_Pos --;
+ }
+ } else if (ch == '>') {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ if (ch == '>') {
+ m_WordBuffer[m_WordSize++] = ch;
+ } else {
+ m_Pos --;
+ }
+ }
+ return;
+ }
+ while (1) {
+ if (m_WordSize < MAX_WORD_BUFFER) {
+ m_WordBuffer[m_WordSize++] = ch;
+ }
+ if (type != 'N') {
+ m_bIsNumber = FALSE;
+ }
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ type = _PDF_CharType[ch];
+ if (type == 'D' || type == 'W') {
+ m_Pos --;
+ break;
+ }
+ }
+}
+CFX_ByteString CPDF_SyntaxParser::ReadString()
+{
+ FX_BYTE ch;
+ if (!GetNextChar(ch)) {
+ return CFX_ByteString();
+ }
+ CFX_ByteTextBuf buf;
+ FX_INT32 parlevel = 0;
+ FX_INT32 status = 0, iEscCode = 0;
+ while (1) {
+ switch (status) {
+ case 0:
+ if (ch == ')') {
+ if (parlevel == 0) {
+ return buf.GetByteString();
+ }
+ parlevel --;
+ buf.AppendChar(')');
+ } else if (ch == '(') {
+ parlevel ++;
+ buf.AppendChar('(');
+ } else if (ch == '\\') {
+ status = 1;
+ } else {
+ buf.AppendChar(ch);
+ }
+ break;
+ case 1:
+ if (ch >= '0' && ch <= '7') {
+ iEscCode = ch - '0';
+ status = 2;
+ break;
+ }
+ if (ch == 'n') {
+ buf.AppendChar('\n');
+ } else if (ch == 'r') {
+ buf.AppendChar('\r');
+ } else if (ch == 't') {
+ buf.AppendChar('\t');
+ } else if (ch == 'b') {
+ buf.AppendChar('\b');
+ } else if (ch == 'f') {
+ buf.AppendChar('\f');
+ } else if (ch == '\r') {
+ status = 4;
+ break;
+ } else if (ch == '\n') {
+ } else {
+ buf.AppendChar(ch);
+ }
+ status = 0;
+ break;
+ case 2:
+ if (ch >= '0' && ch <= '7') {
+ iEscCode = iEscCode * 8 + ch - '0';
+ status = 3;
+ } else {
+ buf.AppendChar(iEscCode);
+ status = 0;
+ continue;
+ }
+ break;
+ case 3:
+ if (ch >= '0' && ch <= '7') {
+ iEscCode = iEscCode * 8 + ch - '0';
+ buf.AppendChar(iEscCode);
+ status = 0;
+ } else {
+ buf.AppendChar(iEscCode);
+ status = 0;
+ continue;
+ }
+ break;
+ case 4:
+ status = 0;
+ if (ch != '\n') {
+ continue;
+ }
+ break;
+ }
+ if (!GetNextChar(ch)) {
+ break;
+ }
+ }
+ GetNextChar(ch);
+ return buf.GetByteString();
+}
+CFX_ByteString CPDF_SyntaxParser::ReadHexString()
+{
+ FX_BYTE ch;
+ if (!GetNextChar(ch)) {
+ return CFX_ByteString();
+ }
+ CFX_BinaryBuf buf;
+ FX_BOOL bFirst = TRUE;
+ FX_BYTE code = 0;
+ while (1) {
+ if (ch == '>') {
+ break;
+ }
+ if (ch >= '0' && ch <= '9') {
+ if (bFirst) {
+ code = (ch - '0') * 16;
+ } else {
+ code += ch - '0';
+ buf.AppendByte((FX_BYTE)code);
+ }
+ bFirst = !bFirst;
+ } else if (ch >= 'A' && ch <= 'F') {
+ if (bFirst) {
+ code = (ch - 'A' + 10) * 16;
+ } else {
+ code += ch - 'A' + 10;
+ buf.AppendByte((FX_BYTE)code);
+ }
+ bFirst = !bFirst;
+ } else if (ch >= 'a' && ch <= 'f') {
+ if (bFirst) {
+ code = (ch - 'a' + 10) * 16;
+ } else {
+ code += ch - 'a' + 10;
+ buf.AppendByte((FX_BYTE)code);
+ }
+ bFirst = !bFirst;
+ }
+ if (!GetNextChar(ch)) {
+ break;
+ }
+ }
+ if (!bFirst) {
+ buf.AppendByte((FX_BYTE)code);
+ }
+ return buf.GetByteString();
+}
+void CPDF_SyntaxParser::ToNextLine()
+{
+ FX_BYTE ch;
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ if (ch == '\n') {
+ return;
+ }
+ if (ch == '\r') {
+ GetNextChar(ch);
+ if (ch == '\n') {
+ return;
+ } else {
+ m_Pos --;
+ return;
+ }
+ }
+ }
+}
+void CPDF_SyntaxParser::ToNextWord()
+{
+ FX_BYTE ch;
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ FX_BYTE type = _PDF_CharType[ch];
+ while (1) {
+ while (type == 'W') {
+ m_dwWordPos = m_Pos;
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ type = _PDF_CharType[ch];
+ }
+ if (ch != '%') {
+ break;
+ }
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ if (ch == '\r' || ch == '\n') {
+ break;
+ }
+ }
+ type = _PDF_CharType[ch];
+ }
+ m_Pos --;
+}
+CFX_ByteString CPDF_SyntaxParser::GetNextWord(FX_BOOL& bIsNumber)
+{
+ GetNextWord();
+ bIsNumber = m_bIsNumber;
+ return CFX_ByteString((FX_LPCSTR)m_WordBuffer, m_WordSize);
+}
+CFX_ByteString CPDF_SyntaxParser::GetKeyword()
+{
+ GetNextWord();
+ return CFX_ByteString((FX_LPCSTR)m_WordBuffer, m_WordSize);
+}
+CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, FX_DWORD gennum, FX_INT32 level, PARSE_CONTEXT* pContext, FX_BOOL bDecrypt)
+{
+ if (level > _PARSER_OBJECT_LEVLE_) {
+ return NULL;
+ }
+ FX_FILESIZE SavedPos = m_Pos;
+ FX_BOOL bTypeOnly = pContext && (pContext->m_Flags & PDFPARSE_TYPEONLY);
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = GetNextWord(bIsNumber);
+ CPDF_Object* pRet = NULL;
+ if (word.GetLength() == 0) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_INVALID;
+ }
+ return NULL;
+ }
+ FX_FILESIZE wordOffset = m_Pos - word.GetLength();
+ if (bIsNumber) {
+ FX_FILESIZE SavedPos = m_Pos;
+ CFX_ByteString nextword = GetNextWord(bIsNumber);
+ if (bIsNumber) {
+ CFX_ByteString nextword2 = GetNextWord(bIsNumber);
+ if (nextword2 == FX_BSTRC("R")) {
+ FX_DWORD objnum = FXSYS_atoi(word);
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_REFERENCE;
+ }
+ pRet = CPDF_Reference::Create(pObjList, objnum);
+ return pRet;
+ } else {
+ m_Pos = SavedPos;
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NUMBER;
+ }
+ pRet = CPDF_Number::Create(word);
+ return pRet;
+ }
+ } else {
+ m_Pos = SavedPos;
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NUMBER;
+ }
+ pRet = CPDF_Number::Create(word);
+ return pRet;
+ }
+ }
+ if (word == FX_BSTRC("true") || word == FX_BSTRC("false")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_BOOLEAN;
+ }
+ pRet = CPDF_Boolean::Create(word == FX_BSTRC("true"));
+ return pRet;
+ }
+ if (word == FX_BSTRC("null")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NULL;
+ }
+ pRet = CPDF_Null::Create();
+ return pRet;
+ }
+ if (word == FX_BSTRC("(")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_STRING;
+ }
+ FX_FILESIZE SavedPos = m_Pos - 1;
+ CFX_ByteString str = ReadString();
+ if (m_pCryptoHandler && bDecrypt) {
+ m_pCryptoHandler->Decrypt(objnum, gennum, str);
+ }
+ pRet = CPDF_String::Create(str, FALSE);
+ return pRet;
+ }
+ if (word == FX_BSTRC("<")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_STRING;
+ }
+ FX_FILESIZE SavedPos = m_Pos - 1;
+ CFX_ByteString str = ReadHexString();
+ if (m_pCryptoHandler && bDecrypt) {
+ m_pCryptoHandler->Decrypt(objnum, gennum, str);
+ }
+ pRet = CPDF_String::Create(str, TRUE);
+ return pRet;
+ }
+ if (word == FX_BSTRC("[")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_ARRAY;
+ }
+ CPDF_Array* pArray = CPDF_Array::Create();
+ FX_FILESIZE firstPos = m_Pos - 1;
+ while (1) {
+ FX_FILESIZE SavedPos = m_Pos;
+ CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, level + 1);
+ if (pObj == NULL) {
+ return pArray;
+ }
+ pArray->Add(pObj);
+ }
+ }
+ if (word[0] == '/') {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NAME;
+ }
+ pRet = CPDF_Name::Create(PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)));
+ return pRet;
+ }
+ if (word == FX_BSTRC("<<")) {
+ FX_FILESIZE saveDictOffset = m_Pos - 2;
+ FX_DWORD dwDictSize = 0;
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_DICTIONARY;
+ }
+ if (pContext) {
+ pContext->m_DictStart = SavedPos;
+ }
+ CPDF_Dictionary* pDict = CPDF_Dictionary::Create();
+ FX_INT32 nKeys = 0;
+ FX_FILESIZE dwSignValuePos = 0;
+ while (1) {
+ FX_BOOL bIsNumber;
+ CFX_ByteString key = GetNextWord(bIsNumber);
+ if (key.IsEmpty()) {
+ pDict->Release();
+ return NULL;
+ }
+ FX_FILESIZE SavedPos = m_Pos - key.GetLength();
+ if (key == FX_BSTRC(">>")) {
+ dwDictSize = m_Pos - saveDictOffset;
+ break;
+ }
+ if (key == FX_BSTRC("endobj")) {
+ dwDictSize = m_Pos - 6 - saveDictOffset;
+ m_Pos = SavedPos;
+ break;
+ }
+ if (key[0] != '/') {
+ continue;
+ }
+ nKeys ++;
+ key = PDF_NameDecode(key);
+ if (key == FX_BSTRC("/Contents")) {
+ dwSignValuePos = m_Pos;
+ }
+ CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, level + 1);
+ if (pObj == NULL) {
+ continue;
+ }
+ if (key.GetLength() == 1) {
+ pDict->SetAt(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
+ } else {
+ if (nKeys < 32) {
+ pDict->SetAt(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
+ } else {
+ pDict->AddValue(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
+ }
+ }
+ }
+ if (IsSignatureDict(pDict)) {
+ FX_FILESIZE dwSavePos = m_Pos;
+ m_Pos = dwSignValuePos;
+ CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, level + 1, NULL, FALSE);
+ pDict->SetAt(FX_BSTRC("Contents"), pObj);
+ m_Pos = dwSavePos;
+ }
+ if (pContext) {
+ pContext->m_DictEnd = m_Pos;
+ if (pContext->m_Flags & PDFPARSE_NOSTREAM) {
+ return pDict;
+ }
+ }
+ FX_FILESIZE SavedPos = m_Pos;
+ FX_BOOL bIsNumber;
+ CFX_ByteString nextword = GetNextWord(bIsNumber);
+ if (nextword == FX_BSTRC("stream")) {
+ CPDF_Stream* pStream = ReadStream(pDict, pContext, objnum, gennum);
+ if (pStream) {
+ return pStream;
+ }
+ pDict->Release();
+ return NULL;
+ } else {
+ m_Pos = SavedPos;
+ return pDict;
+ }
+ }
+ if (word == FX_BSTRC(">>")) {
+ m_Pos = SavedPos;
+ return NULL;
+ }
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_INVALID;
+ }
+ return NULL;
+}
+CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, FX_DWORD gennum,
+ FX_INT32 level, struct PARSE_CONTEXT* pContext)
+{
+ if (level > _PARSER_OBJECT_LEVLE_) {
+ return NULL;
+ }
+ FX_FILESIZE SavedPos = m_Pos;
+ FX_BOOL bTypeOnly = pContext && (pContext->m_Flags & PDFPARSE_TYPEONLY);
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = GetNextWord(bIsNumber);
+ if (word.GetLength() == 0) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_INVALID;
+ }
+ return NULL;
+ }
+ if (bIsNumber) {
+ FX_FILESIZE SavedPos = m_Pos;
+ CFX_ByteString nextword = GetNextWord(bIsNumber);
+ if (bIsNumber) {
+ CFX_ByteString nextword2 = GetNextWord(bIsNumber);
+ if (nextword2 == FX_BSTRC("R")) {
+ FX_DWORD objnum = FXSYS_atoi(word);
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_REFERENCE;
+ }
+ return CPDF_Reference::Create(pObjList, objnum);
+ } else {
+ m_Pos = SavedPos;
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NUMBER;
+ }
+ return CPDF_Number::Create(word);
+ }
+ } else {
+ m_Pos = SavedPos;
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NUMBER;
+ }
+ return CPDF_Number::Create(word);
+ }
+ }
+ if (word == FX_BSTRC("true") || word == FX_BSTRC("false")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_BOOLEAN;
+ }
+ return CPDF_Boolean::Create(word == FX_BSTRC("true"));
+ }
+ if (word == FX_BSTRC("null")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NULL;
+ }
+ return CPDF_Null::Create();
+ }
+ if (word == FX_BSTRC("(")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_STRING;
+ }
+ CFX_ByteString str = ReadString();
+ if (m_pCryptoHandler) {
+ m_pCryptoHandler->Decrypt(objnum, gennum, str);
+ }
+ return CPDF_String::Create(str, FALSE);
+ }
+ if (word == FX_BSTRC("<")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_STRING;
+ }
+ CFX_ByteString str = ReadHexString();
+ if (m_pCryptoHandler) {
+ m_pCryptoHandler->Decrypt(objnum, gennum, str);
+ }
+ return CPDF_String::Create(str, TRUE);
+ }
+ if (word == FX_BSTRC("[")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_ARRAY;
+ }
+ CPDF_Array* pArray = CPDF_Array::Create();
+ while (1) {
+ CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, level + 1);
+ if (pObj == NULL) {
+ if (m_WordBuffer[0] == ']') {
+ return pArray;
+ }
+ pArray->Release();
+ return NULL;
+ }
+ pArray->Add(pObj);
+ }
+ }
+ if (word[0] == '/') {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_NAME;
+ }
+ return CPDF_Name::Create(PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)));
+ }
+ if (word == FX_BSTRC("<<")) {
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_DICTIONARY;
+ }
+ if (pContext) {
+ pContext->m_DictStart = SavedPos;
+ }
+ CPDF_Dictionary* pDict = CPDF_Dictionary::Create();
+ while (1) {
+ FX_BOOL bIsNumber;
+ FX_FILESIZE SavedPos = m_Pos;
+ CFX_ByteString key = GetNextWord(bIsNumber);
+ if (key.IsEmpty()) {
+ pDict->Release();
+ return NULL;
+ }
+ if (key == FX_BSTRC(">>")) {
+ break;
+ }
+ if (key == FX_BSTRC("endobj")) {
+ m_Pos = SavedPos;
+ break;
+ }
+ if (key[0] != '/') {
+ continue;
+ }
+ key = PDF_NameDecode(key);
+ CPDF_Object* pObj = GetObject(pObjList, objnum, gennum, level + 1);
+ if (pObj == NULL) {
+ pDict->Release();
+ FX_BYTE ch;
+ while (1) {
+ if (!GetNextChar(ch)) {
+ break;
+ }
+ if (ch == 0x0A || ch == 0x0D) {
+ break;
+ }
+ }
+ return NULL;
+ }
+ if (key.GetLength() == 1) {
+ pDict->SetAt(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
+ } else {
+ pDict->AddValue(CFX_ByteStringC(((FX_LPCSTR)key) + 1, key.GetLength() - 1), pObj);
+ }
+ }
+ if (pContext) {
+ pContext->m_DictEnd = m_Pos;
+ if (pContext->m_Flags & PDFPARSE_NOSTREAM) {
+ return pDict;
+ }
+ }
+ FX_FILESIZE SavedPos = m_Pos;
+ FX_BOOL bIsNumber;
+ CFX_ByteString nextword = GetNextWord(bIsNumber);
+ if (nextword == FX_BSTRC("stream")) {
+ CPDF_Stream* pStream = ReadStream(pDict, pContext, objnum, gennum);
+ if (pStream) {
+ return pStream;
+ }
+ pDict->Release();
+ return NULL;
+ } else {
+ m_Pos = SavedPos;
+ return pDict;
+ }
+ }
+ if (word == FX_BSTRC(">>")) {
+ m_Pos = SavedPos;
+ return NULL;
+ }
+ if (bTypeOnly) {
+ return (CPDF_Object*)PDFOBJ_INVALID;
+ }
+ return NULL;
+}
+CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict, PARSE_CONTEXT* pContext,
+ FX_DWORD objnum, FX_DWORD gennum)
+{
+ CPDF_Object* pLenObj = pDict->GetElement(FX_BSTRC("Length"));
+ FX_DWORD len = 0;
+ if (pLenObj && (pLenObj->GetType() != PDFOBJ_REFERENCE ||
+ (((CPDF_Reference*)pLenObj)->GetObjList() != NULL) &&
+ ((CPDF_Reference*)pLenObj)->GetRefObjNum() != objnum)) {
+ FX_FILESIZE pos = m_Pos;
+ if (pLenObj) {
+ len = pLenObj->GetInteger();
+ }
+ m_Pos = pos;
+ if (len > 0x40000000) {
+ return NULL;
+ }
+ }
+ ToNextLine();
+ FX_FILESIZE StreamStartPos = m_Pos;
+ if (pContext) {
+ pContext->m_DataStart = m_Pos;
+ }
+ m_Pos += len;
+ CPDF_CryptoHandler* pCryptoHandler = objnum == (FX_DWORD)m_MetadataObjnum ? NULL : m_pCryptoHandler;
+ if (pCryptoHandler == NULL) {
+ FX_FILESIZE SavedPos = m_Pos;
+ GetNextWord();
+ if (m_WordSize < 9 || FXSYS_memcmp32(m_WordBuffer, "endstream", 9)) {
+ m_Pos = StreamStartPos;
+ FX_FILESIZE offset = FindTag(FX_BSTRC("endstream"), 0);
+ if (offset >= 0) {
+ FX_FILESIZE curPos = m_Pos;
+ m_Pos = StreamStartPos;
+ FX_FILESIZE endobjOffset = FindTag(FX_BSTRC("endobj"), 0);
+ if (endobjOffset < offset && endobjOffset >= 0) {
+ offset = endobjOffset;
+ } else {
+ m_Pos = curPos;
+ }
+ FX_BYTE byte1, byte2;
+ GetCharAt(StreamStartPos + offset - 1, byte1);
+ GetCharAt(StreamStartPos + offset - 2, byte2);
+ if (byte1 == 0x0a && byte2 == 0x0d) {
+ len -= 2;
+ } else if (byte1 == 0x0a || byte1 == 0x0d) {
+ len --;
+ }
+ len = (FX_DWORD)offset;
+ pDict->SetAtInteger(FX_BSTRC("Length"), len);
+ } else {
+ m_Pos = StreamStartPos;
+ if (FindTag(FX_BSTRC("endobj"), 0) < 0) {
+ return NULL;
+ }
+ }
+ }
+ }
+ m_Pos = StreamStartPos;
+ CPDF_Stream* pStream;
+#if defined(_FPDFAPI_MINI_) && !defined(_FXCORE_FEATURE_ALL_)
+ pStream = FX_NEW CPDF_Stream(m_pFileAccess, pCryptoHandler, m_HeaderOffset + m_Pos, len, pDict, gennum);
+ m_Pos += len;
+#else
+ FX_LPBYTE pData = FX_Alloc(FX_BYTE, len);
+ if (!pData) {
+ return NULL;
+ }
+ ReadBlock(pData, len);
+ if (pCryptoHandler) {
+ CFX_BinaryBuf dest_buf;
+ dest_buf.EstimateSize(pCryptoHandler->DecryptGetSize(len));
+ FX_LPVOID 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();
+ }
+ pStream = FX_NEW CPDF_Stream(pData, len, pDict);
+#endif
+ if (pContext) {
+ pContext->m_DataEnd = pContext->m_DataStart + len;
+ }
+ StreamStartPos = m_Pos;
+ GetNextWord();
+ if (m_WordSize == 6 && 0 == FXSYS_memcmp32(m_WordBuffer, "endobj", 6)) {
+ m_Pos = StreamStartPos;
+ }
+ return pStream;
+}
+void CPDF_SyntaxParser::InitParser(IFX_FileRead* pFileAccess, FX_DWORD HeaderOffset)
+{
+ if (m_pFileBuf) {
+ FX_Free(m_pFileBuf);
+ m_pFileBuf = NULL;
+ }
+ m_pFileBuf = FX_Alloc(FX_BYTE, m_BufSize);
+ m_HeaderOffset = HeaderOffset;
+ m_FileLen = pFileAccess->GetSize();
+ m_Pos = 0;
+ m_pFileAccess = pFileAccess;
+ m_BufOffset = 0;
+ pFileAccess->ReadBlock(m_pFileBuf, 0, (size_t)((FX_FILESIZE)m_BufSize > m_FileLen ? m_FileLen : m_BufSize));
+}
+FX_INT32 CPDF_SyntaxParser::GetDirectNum()
+{
+ GetNextWord();
+ if (!m_bIsNumber) {
+ return 0;
+ }
+ m_WordBuffer[m_WordSize] = 0;
+ return FXSYS_atoi((FX_LPCSTR)m_WordBuffer);
+}
+FX_BOOL CPDF_SyntaxParser::IsWholeWord(FX_FILESIZE startpos, FX_FILESIZE limit, FX_LPCBYTE tag, FX_DWORD taglen)
+{
+ FX_BYTE type = _PDF_CharType[tag[0]];
+ FX_BOOL bCheckLeft = type != 'D' && type != 'W';
+ type = _PDF_CharType[tag[taglen - 1]];
+ FX_BOOL bCheckRight = type != 'D' || type != 'W';
+ FX_BYTE ch;
+ if (bCheckRight && startpos + (FX_INT32)taglen <= limit && GetCharAt(startpos + (FX_INT32)taglen, ch)) {
+ FX_BYTE type = _PDF_CharType[ch];
+ if (type == 'N' || type == 'R') {
+ return FALSE;
+ }
+ }
+ if (bCheckLeft && startpos > 0 && GetCharAt(startpos - 1, ch)) {
+ FX_BYTE type = _PDF_CharType[ch];
+ if (type == 'N' || type == 'R') {
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_SyntaxParser::SearchWord(FX_BSTR tag, FX_BOOL bWholeWord, FX_BOOL bForward, FX_FILESIZE limit)
+{
+ FX_INT32 taglen = tag.GetLength();
+ if (taglen == 0) {
+ return FALSE;
+ }
+ FX_FILESIZE pos = m_Pos;
+ FX_INT32 offset = 0;
+ if (!bForward) {
+ offset = taglen - 1;
+ }
+ FX_LPCBYTE tag_data = tag;
+ FX_BYTE byte;
+ while (1) {
+ if (bForward) {
+ if (limit) {
+ if (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)) {
+ return FALSE;
+ }
+ }
+ if (byte == tag_data[offset]) {
+ if (bForward) {
+ offset ++;
+ if (offset < taglen) {
+ pos ++;
+ continue;
+ }
+ } else {
+ offset --;
+ if (offset >= 0) {
+ pos --;
+ continue;
+ }
+ }
+ FX_FILESIZE startpos = bForward ? pos - taglen + 1 : pos;
+ if (!bWholeWord || IsWholeWord(startpos, limit, tag, taglen)) {
+ m_Pos = startpos;
+ return TRUE;
+ }
+ }
+ if (bForward) {
+ offset = byte == tag_data[0] ? 1 : 0;
+ pos ++;
+ } else {
+ offset = byte == tag_data[taglen - 1] ? taglen - 2 : taglen - 1;
+ pos --;
+ }
+ if (pos < 0) {
+ return FALSE;
+ }
+ }
+ return FALSE;
+}
+struct _SearchTagRecord {
+ FX_LPCBYTE m_pTag;
+ FX_DWORD m_Len;
+ FX_DWORD m_Offset;
+};
+FX_INT32 CPDF_SyntaxParser::SearchMultiWord(FX_BSTR tags, FX_BOOL bWholeWord, FX_FILESIZE limit)
+{
+ FX_INT32 ntags = 1, i;
+ for (i = 0; i < tags.GetLength(); i ++)
+ if (tags[i] == 0) {
+ ntags ++;
+ }
+ _SearchTagRecord* pPatterns = FX_Alloc(_SearchTagRecord, ntags);
+ FX_DWORD start = 0, itag = 0, max_len = 0;
+ for (i = 0; i <= tags.GetLength(); i ++) {
+ if (tags[i] == 0) {
+ FX_DWORD len = i - start;
+ if (len > max_len) {
+ max_len = len;
+ }
+ pPatterns[itag].m_pTag = tags.GetPtr() + start;
+ pPatterns[itag].m_Len = len;
+ pPatterns[itag].m_Offset = 0;
+ start = i + 1;
+ itag ++;
+ }
+ }
+ FX_FILESIZE pos = m_Pos;
+ FX_BYTE byte;
+ GetCharAt(pos++, byte);
+ FX_INT32 found = -1;
+ while (1) {
+ for (i = 0; i < ntags; i ++) {
+ if (pPatterns[i].m_pTag[pPatterns[i].m_Offset] == byte) {
+ pPatterns[i].m_Offset ++;
+ if (pPatterns[i].m_Offset == pPatterns[i].m_Len) {
+ if (!bWholeWord || IsWholeWord(pos - pPatterns[i].m_Len, limit, pPatterns[i].m_pTag, pPatterns[i].m_Len)) {
+ found = i;
+ goto end;
+ } else {
+ if (pPatterns[i].m_pTag[0] == byte) {
+ pPatterns[i].m_Offset = 1;
+ } else {
+ pPatterns[i].m_Offset = 0;
+ }
+ }
+ }
+ } else {
+ if (pPatterns[i].m_pTag[0] == byte) {
+ pPatterns[i].m_Offset = 1;
+ } else {
+ pPatterns[i].m_Offset = 0;
+ }
+ }
+ }
+ if (limit && pos >= m_Pos + limit) {
+ goto end;
+ }
+ if (!GetCharAt(pos, byte)) {
+ goto end;
+ }
+ pos ++;
+ }
+end:
+ FX_Free(pPatterns);
+ return found;
+}
+FX_FILESIZE CPDF_SyntaxParser::FindTag(FX_BSTR tag, FX_FILESIZE limit)
+{
+ FX_INT32 taglen = tag.GetLength();
+ FX_INT32 match = 0;
+ limit += m_Pos;
+ FX_FILESIZE startpos = m_Pos;
+ while (1) {
+ FX_BYTE ch;
+ if (!GetNextChar(ch)) {
+ return -1;
+ }
+ if (ch == tag[match]) {
+ match ++;
+ if (match == taglen) {
+ return m_Pos - startpos - taglen;
+ }
+ } else {
+ match = ch == tag[0] ? 1 : 0;
+ }
+ if (limit && m_Pos == limit) {
+ return -1;
+ }
+ }
+ return -1;
+}
+void CPDF_SyntaxParser::GetBinary(FX_BYTE* buffer, FX_DWORD size)
+{
+ FX_DWORD offset = 0;
+ FX_BYTE ch;
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return;
+ }
+ buffer[offset++] = ch;
+ if (offset == size) {
+ break;
+ }
+ }
+}
+CPDF_DataAvail::CPDF_DataAvail(IFX_FileAvail* pFileAvail, IFX_FileRead* pFileRead)
+{
+ m_pFileAvail = pFileAvail;
+ m_pFileRead = pFileRead;
+ m_Pos = 0;
+ m_dwFileLen = 0;
+ if (m_pFileRead) {
+ m_dwFileLen = (FX_DWORD)m_pFileRead->GetSize();
+ }
+ m_dwCurrentOffset = 0;
+ m_WordSize = 0;
+ m_dwXRefOffset = 0;
+ m_bufferOffset = 0;
+ m_dwFirstPageNo = 0;
+ m_bufferSize = 0;
+ m_PagesObjNum = 0;
+ m_dwCurrentXRefSteam = 0;
+ m_dwAcroFormObjNum = 0;
+ m_dwInfoObjNum = 0;
+ m_pDocument = 0;
+ m_dwEncryptObjNum = 0;
+ m_dwPrevXRefOffset = 0;
+ m_dwLastXRefOffset = 0;
+ m_bDocAvail = FALSE;
+ m_bMainXRefLoad = FALSE;
+ m_bDocAvail = FALSE;
+ m_bLinearized = FALSE;
+ m_bPagesLoad = FALSE;
+ m_bPagesTreeLoad = FALSE;
+ m_bMainXRefLoadedOK = FALSE;
+ m_bAnnotsLoad = FALSE;
+ m_bHaveAcroForm = FALSE;
+ m_bAcroFormLoad = FALSE;
+ m_bPageLoadedOK = FALSE;
+ m_bNeedDownLoadResource = FALSE;
+ m_bLinearizedFormParamLoad = FALSE;
+ m_pLinearized = NULL;
+ m_pRoot = NULL;
+ m_pTrailer = NULL;
+ m_pCurrentParser = NULL;
+ m_pAcroForm = NULL;
+ m_pPageDict = NULL;
+ m_pPageResource = NULL;
+ m_pageMapCheckState = NULL;
+ m_docStatus = PDF_DATAAVAIL_HEADER;
+ m_parser.m_bOwnFileRead = FALSE;
+ m_bTotalLoadPageTree = FALSE;
+ m_bCurPageDictLoadOK = FALSE;
+ m_bLinearedDataOK = FALSE;
+ m_pagesLoadState = NULL;
+}
+CPDF_DataAvail::~CPDF_DataAvail()
+{
+ if (m_pLinearized) {
+ m_pLinearized->Release();
+ }
+ if (m_pRoot) {
+ m_pRoot->Release();
+ }
+ if (m_pTrailer) {
+ m_pTrailer->Release();
+ }
+ if (m_pageMapCheckState) {
+ delete m_pageMapCheckState;
+ }
+ if (m_pagesLoadState) {
+ delete m_pagesLoadState;
+ }
+ FX_INT32 i = 0;
+ FX_INT32 iSize = m_arrayAcroforms.GetSize();
+ for (i = 0; i < iSize; ++i) {
+ ((CPDF_Object *)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 = (CPDF_Parser *)(m_pDocument->GetParser());
+ if (pParser == NULL) {
+ return 0;
+ }
+ if (objnum >= (FX_DWORD)pParser->m_CrossRef.GetSize()) {
+ return 0;
+ }
+ if (pParser->m_V5Type[objnum] == 2) {
+ objnum = (FX_DWORD)pParser->m_CrossRef[objnum];
+ }
+ if (pParser->m_V5Type[objnum] == 1 || pParser->m_V5Type[objnum] == 255) {
+ offset = pParser->m_CrossRef[objnum];
+ if (offset == 0) {
+ return 0;
+ }
+ FX_LPVOID pResult = FXSYS_bsearch(&offset, pParser->m_SortedOffset.GetData(), pParser->m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ if (pResult == NULL) {
+ return 0;
+ }
+ if ((FX_FILESIZE*)pResult - (FX_FILESIZE*)pParser->m_SortedOffset.GetData() == pParser->m_SortedOffset.GetSize() - 1) {
+ return 0;
+ }
+ return (FX_DWORD)(((FX_FILESIZE*)pResult)[1] - offset);
+ }
+ return 0;
+}
+FX_BOOL CPDF_DataAvail::IsObjectsAvail(CFX_PtrArray& obj_array, FX_BOOL bParsePage, IFX_DownloadHints* pHints, CFX_PtrArray &ret_array)
+{
+ if (!obj_array.GetSize()) {
+ return TRUE;
+ }
+ FX_DWORD count = 0;
+ CFX_PtrArray new_obj_array;
+ FX_INT32 i = 0;
+ for (i = 0; i < obj_array.GetSize(); i++) {
+ CPDF_Object *pObj = (CPDF_Object *)obj_array[i];
+ if (!pObj) {
+ continue;
+ }
+ FX_INT32 type = pObj->GetType();
+ switch (type) {
+ case PDFOBJ_ARRAY: {
+ CPDF_Array *pArray = pObj->GetArray();
+ for (FX_DWORD k = 0; k < pArray->GetCount(); k++) {
+ new_obj_array.Add(pArray->GetElement(k));
+ }
+ }
+ break;
+ case PDFOBJ_STREAM:
+ pObj = pObj->GetDict();
+ case PDFOBJ_DICTIONARY: {
+ CPDF_Dictionary *pDict = pObj->GetDict();
+ if (pDict->GetString("Type") == "Page" && !bParsePage) {
+ continue;
+ }
+ FX_POSITION pos = pDict->GetStartPos();
+ while (pos) {
+ CPDF_Object *value;
+ CFX_ByteString key;
+ value = pDict->GetNextElement(pos, key);
+ if (key != "Parent") {
+ new_obj_array.Add(value);
+ }
+ }
+ }
+ break;
+ case PDFOBJ_REFERENCE: {
+ CPDF_Reference *pRef = (CPDF_Reference*)pObj;
+ FX_DWORD dwNum = pRef->GetRefObjNum();
+ FX_FILESIZE offset;
+ FX_DWORD size = GetObjectSize(pRef->GetRefObjNum(), offset);
+ if (!size) {
+ break;
+ }
+ size = (FX_DWORD)((FX_FILESIZE)(offset + size + 512) > m_dwFileLen ? m_dwFileLen - offset : size + 512);
+ if (!m_pFileAvail->IsDataAvail(offset, size)) {
+ pHints->AddSegment(offset, size);
+ ret_array.Add(pObj);
+ count++;
+ } else if (!m_objnum_array.Find(dwNum)) {
+ m_objnum_array.AddObjNum(dwNum);
+ CPDF_Object *pReferred = m_pDocument->GetIndirectObject(pRef->GetRefObjNum(), NULL);
+ if (pReferred) {
+ new_obj_array.Add(pReferred);
+ }
+ }
+ }
+ break;
+ }
+ }
+ if (count > 0) {
+ FX_INT32 iSize = new_obj_array.GetSize();
+ for (i = 0; i < iSize; ++i) {
+ CPDF_Object *pObj = (CPDF_Object *)new_obj_array[i];
+ FX_INT32 type = pObj->GetType();
+ if (type == PDFOBJ_REFERENCE) {
+ CPDF_Reference *pRef = (CPDF_Reference *)pObj;
+ FX_DWORD dwNum = pRef->GetRefObjNum();
+ if (!m_objnum_array.Find(dwNum)) {
+ ret_array.Add(pObj);
+ }
+ } else {
+ ret_array.Add(pObj);
+ }
+ }
+ return FALSE;
+ }
+ obj_array.RemoveAll();
+ obj_array.Append(new_obj_array);
+ return IsObjectsAvail(obj_array, FALSE, pHints, ret_array);
+}
+FX_BOOL CPDF_DataAvail::IsDocAvail(IFX_DownloadHints* pHints)
+{
+ if (!m_dwFileLen && m_pFileRead) {
+ m_dwFileLen = (FX_DWORD)m_pFileRead->GetSize();
+ if (!m_dwFileLen) {
+ return TRUE;
+ }
+ }
+ while (!m_bDocAvail) {
+ if (!CheckDocStatus(pHints)) {
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckAcroFormSubObject(IFX_DownloadHints* pHints)
+{
+ if (!m_objs_array.GetSize()) {
+ m_objs_array.RemoveAll();
+ m_objnum_array.RemoveAll();
+ CFX_PtrArray obj_array;
+ obj_array.Append(m_arrayAcroforms);
+ FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
+ if (bRet) {
+ m_objs_array.RemoveAll();
+ }
+ return bRet;
+ } else {
+ CFX_PtrArray new_objs_array;
+ FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
+ if (bRet) {
+ FX_INT32 iSize = m_arrayAcroforms.GetSize();
+ for (FX_INT32 i = 0; i < iSize; ++i) {
+ ((CPDF_Object *)m_arrayAcroforms.GetAt(i))->Release();
+ }
+ m_arrayAcroforms.RemoveAll();
+ } else {
+ m_objs_array.RemoveAll();
+ m_objs_array.Append(new_objs_array);
+ }
+ return bRet;
+ }
+}
+FX_BOOL CPDF_DataAvail::CheckAcroForm(IFX_DownloadHints* pHints)
+{
+ FX_BOOL bExist = FALSE;
+ m_pAcroForm = GetObject(m_dwAcroFormObjNum, pHints, &bExist);
+ if (!bExist) {
+ m_docStatus = PDF_DATAAVAIL_PAGETREE;
+ return TRUE;
+ }
+ if (!m_pAcroForm) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ 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:
+ return CheckHeader(pHints);
+ case PDF_DATAAVAIL_FIRSTPAGE:
+ case PDF_DATAAVAIL_FIRSTPAGE_PREPARE:
+ return CheckFirstPage(pHints);
+ case PDF_DATAAVAIL_END:
+ return CheckEnd(pHints);
+ case PDF_DATAAVAIL_CROSSREF:
+ return CheckCrossRef(pHints);
+ case PDF_DATAAVAIL_CROSSREF_ITEM:
+ return CheckCrossRefItem(pHints);
+ case PDF_DATAAVAIL_CROSSREF_STREAM:
+ return CheckAllCrossRefStream(pHints);
+ case PDF_DATAAVAIL_TRAILER:
+ return CheckTrailer(pHints);
+ case PDF_DATAAVAIL_TRAILER_APPEND:
+ return CheckTrailerAppend(pHints);
+ case PDF_DATAAVAIL_LOADALLCRSOSSREF:
+ return LoadAllXref(pHints);
+ case PDF_DATAAVAIL_LOADALLFILE:
+ return LoadAllFile(pHints);
+ case PDF_DATAAVAIL_ROOT:
+ return CheckRoot(pHints);
+ case PDF_DATAAVAIL_INFO:
+ return CheckInfo(pHints);
+ case PDF_DATAAVAIL_ACROFORM:
+ return CheckAcroForm(pHints);
+ case PDF_DATAAVAIL_PAGETREE:
+ if (m_bTotalLoadPageTree) {
+ return CheckPages(pHints);
+ } else {
+ return LoadDocPages(pHints);
+ }
+ case PDF_DATAAVAIL_PAGE:
+ if (m_bTotalLoadPageTree) {
+ return CheckPage(pHints);
+ } else {
+ m_docStatus = PDF_DATAAVAIL_PAGE_LATERLOAD;
+ return TRUE;
+ }
+ case PDF_DATAAVAIL_ERROR:
+ return LoadAllFile(pHints);
+ case PDF_DATAAVAIL_PAGE_LATERLOAD:
+ m_docStatus = PDF_DATAAVAIL_PAGE;
+ default:
+ m_bDocAvail = TRUE;
+ return TRUE;
+ }
+}
+FX_BOOL CPDF_DataAvail::CheckPageStatus(IFX_DownloadHints* pHints)
+{
+ switch (m_docStatus) {
+ case PDF_DATAAVAIL_PAGETREE:
+ return CheckPages(pHints);
+ case PDF_DATAAVAIL_PAGE:
+ return CheckPage(pHints);
+ case PDF_DATAAVAIL_ERROR:
+ return LoadAllFile(pHints);
+ default:
+ m_bPagesTreeLoad = TRUE;
+ m_bPagesLoad = TRUE;
+ 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;
+ if (!m_parser.LoadAllCrossRefV4(m_dwLastXRefOffset) && !m_parser.LoadAllCrossRefV5(m_dwLastXRefOffset)) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return FALSE;
+ }
+ FXSYS_qsort(m_parser.m_SortedOffset.GetData(), m_parser.m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), _CompareFileSize);
+ 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)
+{
+ CPDF_Object *pRet = NULL;
+ if (pExistInFile) {
+ *pExistInFile = TRUE;
+ }
+ if (m_pDocument == NULL) {
+ FX_FILESIZE offset = m_parser.GetObjectOffset(objnum);
+ if (offset < 0) {
+ *pExistInFile = FALSE;
+ return NULL;
+ }
+ FX_DWORD size = (FX_DWORD)m_parser.GetObjectSize(objnum);
+ size = (FX_DWORD)(((FX_FILESIZE)(offset + size + 512)) > m_dwFileLen ? m_dwFileLen - offset : size + 512);
+ if (!m_pFileAvail->IsDataAvail(offset, size)) {
+ pHints->AddSegment(offset, size);
+ return NULL;
+ }
+ pRet = m_parser.ParseIndirectObject(NULL, objnum);
+ if (!pRet && pExistInFile) {
+ *pExistInFile = FALSE;
+ }
+ return pRet;
+ }
+ FX_FILESIZE offset;
+ FX_DWORD size = GetObjectSize(objnum, offset);
+ size = (FX_DWORD)((FX_FILESIZE)(offset + size + 512) > m_dwFileLen ? m_dwFileLen - offset : size + 512);
+ if (!m_pFileAvail->IsDataAvail(offset, size)) {
+ pHints->AddSegment(offset, size);
+ return NULL;
+ }
+ CPDF_Parser *pParser = (CPDF_Parser *)(m_pDocument->GetParser());
+ pRet = pParser->ParseIndirectObject(NULL, objnum, NULL);
+ if (!pRet && pExistInFile) {
+ *pExistInFile = FALSE;
+ }
+ return pRet;
+}
+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;
+ }
+ return TRUE;
+ }
+ if (!pInfo) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ if (m_Pos == m_dwFileLen) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ }
+ return FALSE;
+ }
+ if (pInfo) {
+ pInfo->Release();
+ }
+ if (m_bHaveAcroForm) {
+ m_docStatus = PDF_DATAAVAIL_ACROFORM;
+ } else {
+ m_docStatus = PDF_DATAAVAIL_PAGETREE;
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckRoot(IFX_DownloadHints* pHints)
+{
+ FX_BOOL bExist = FALSE;
+ m_pRoot = GetObject(m_dwRootObjNum, pHints, &bExist);
+ if (!bExist) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ if (!m_pRoot) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ return FALSE;
+ }
+ CPDF_Reference* pRef = (CPDF_Reference*)m_pRoot->GetDict()->GetElement(FX_BSTRC("Pages"));
+ if (pRef == NULL || pRef->GetType() != PDFOBJ_REFERENCE) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ m_PagesObjNum = pRef->GetRefObjNum();
+ CPDF_Reference* pAcroFormRef = (CPDF_Reference*)m_pRoot->GetDict()->GetElement(FX_BSTRC("AcroForm"));
+ if (pAcroFormRef && pAcroFormRef->GetType() == PDFOBJ_REFERENCE) {
+ m_bHaveAcroForm = TRUE;
+ m_dwAcroFormObjNum = pAcroFormRef->GetRefObjNum();
+ }
+ if (m_dwInfoObjNum) {
+ m_docStatus = PDF_DATAAVAIL_INFO;
+ } else {
+ if (m_bHaveAcroForm) {
+ m_docStatus = PDF_DATAAVAIL_ACROFORM;
+ } else {
+ m_docStatus = PDF_DATAAVAIL_PAGETREE;
+ }
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::PreparePageItem()
+{
+ CPDF_Dictionary *pRoot = m_pDocument->GetRoot();
+ CPDF_Reference* pRef = (CPDF_Reference*)pRoot->GetElement(FX_BSTRC("Pages"));
+ if (pRef == NULL || pRef->GetType() != PDFOBJ_REFERENCE) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ m_PagesObjNum = pRef->GetRefObjNum();
+ m_pCurrentParser = (CPDF_Parser *)m_pDocument->GetParser();
+ m_docStatus = PDF_DATAAVAIL_PAGETREE;
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::IsFirstCheck(int iPage)
+{
+ if (NULL == m_pageMapCheckState) {
+ m_pageMapCheckState = FX_NEW CFX_CMapDWordToDWord();
+ }
+ FX_DWORD dwValue = 0;
+ if (!m_pageMapCheckState->Lookup(iPage, dwValue)) {
+ m_pageMapCheckState->SetAt(iPage, 1);
+ return TRUE;
+ }
+ if (dwValue != 0) {
+ return FALSE;
+ }
+ m_pageMapCheckState->SetAt(iPage, 1);
+ return TRUE;
+}
+void CPDF_DataAvail::ResetFirstCheck(int iPage)
+{
+ if (NULL == m_pageMapCheckState) {
+ m_pageMapCheckState = FX_NEW CFX_CMapDWordToDWord();
+ }
+ FX_DWORD dwValue = 1;
+ if (!m_pageMapCheckState->Lookup(iPage, dwValue)) {
+ return;
+ }
+ m_pageMapCheckState->SetAt(iPage, 0);
+}
+FX_BOOL CPDF_DataAvail::CheckPage(IFX_DownloadHints* pHints)
+{
+ FX_DWORD i = 0;
+ FX_DWORD iLen = m_PageObjList.GetSize();
+ CFX_DWordArray UnavailObjList;
+ for (; i < iLen; ++i) {
+ FX_DWORD dwPageObjNum = m_PageObjList.GetAt(i);
+ FX_BOOL bExist = FALSE;
+ CPDF_Object *pObj = GetObject(dwPageObjNum, pHints, &bExist);
+ if (!pObj) {
+ if (bExist) {
+ UnavailObjList.Add(dwPageObjNum);
+ }
+ continue;
+ }
+ if (pObj->GetType() == PDFOBJ_ARRAY) {
+ CPDF_Array *pArray = pObj->GetArray();
+ if (pArray) {
+ FX_INT32 iSize = pArray->GetCount();
+ CPDF_Object *pItem = NULL;
+ for (FX_INT32 j = 0; j < iSize; ++j) {
+ pItem = pArray->GetElement(j);
+ if (pItem && pItem->GetType() == PDFOBJ_REFERENCE) {
+ UnavailObjList.Add(((CPDF_Reference *)pItem)->GetRefObjNum());
+ }
+ }
+ }
+ }
+ if (pObj->GetType() != PDFOBJ_DICTIONARY) {
+ pObj->Release();
+ continue;
+ }
+ CFX_ByteString type = pObj->GetDict()->GetString(FX_BSTRC("Type"));
+ if (type == FX_BSTRC("Pages")) {
+ m_PagesArray.Add(pObj);
+ continue;
+ }
+ pObj->Release();
+ }
+ m_PageObjList.RemoveAll();
+ if (UnavailObjList.GetSize()) {
+ m_PageObjList.Append(UnavailObjList);
+ return FALSE;
+ }
+ i = 0;
+ iLen = m_PagesArray.GetSize();
+ for (; i < iLen; ++i) {
+ CPDF_Object *pPages = (CPDF_Object *)m_PagesArray.GetAt(i);
+ if (!pPages) {
+ continue;
+ }
+ if (!GetPageKids(m_pCurrentParser, pPages)) {
+ pPages->Release();
+ while (i++ < iLen) {
+ pPages = (CPDF_Object *)m_PagesArray.GetAt(i);
+ pPages->Release();
+ }
+ m_PagesArray.RemoveAll();
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ pPages->Release();
+ }
+ m_PagesArray.RemoveAll();
+ if (!m_PageObjList.GetSize()) {
+ m_docStatus = PDF_DATAAVAIL_DONE;
+ return TRUE;
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::GetPageKids(CPDF_Parser *pParser, CPDF_Object *pPages)
+{
+ if (!pParser) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ CPDF_Object *pKids = pPages->GetDict()->GetElement(FX_BSTRC("Kids"));
+ if (!pKids) {
+ return TRUE;
+ }
+ switch (pKids->GetType()) {
+ case PDFOBJ_REFERENCE: {
+ CPDF_Reference *pKid = (CPDF_Reference *)pKids;
+ m_PageObjList.Add(pKid->GetRefObjNum());
+ }
+ break;
+ case PDFOBJ_ARRAY: {
+ CPDF_Array *pKidsArray = (CPDF_Array *)pKids;
+ for (FX_DWORD i = 0; i < pKidsArray->GetCount(); ++i) {
+ CPDF_Reference *pKid = (CPDF_Reference *)pKidsArray->GetElement(i);
+ m_PageObjList.Add(pKid->GetRefObjNum());
+ }
+ }
+ break;
+ default:
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckPages(IFX_DownloadHints* pHints)
+{
+ FX_BOOL bExist = FALSE;
+ CPDF_Object *pPages = GetObject(m_PagesObjNum, pHints, &bExist);
+ if (!bExist) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ if (!pPages) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ return FALSE;
+ }
+ FX_BOOL bNeedLoad = 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) {
+ req_size = (FX_DWORD)m_dwFileLen;
+ }
+ if (m_pFileAvail->IsDataAvail(0, req_size)) {
+ FX_BYTE 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) {
+ return FALSE;
+ }
+ m_docStatus = PDF_DATAAVAIL_END;
+ }
+ return TRUE;
+ }
+ pHints->AddSegment(0, req_size);
+ return FALSE;
+}
+FX_BOOL CPDF_DataAvail::CheckFirstPage(IFX_DownloadHints *pHints)
+{
+ FX_DWORD dwFirstPageEndOffset = 0;
+ CPDF_Object *pEndOffSet = m_pLinearized->GetDict()->GetElement(FX_BSTRC("E"));
+ if (!pEndOffSet) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ CPDF_Object *pXRefOffset = m_pLinearized->GetDict()->GetElement(FX_BSTRC("T"));
+ if (!pXRefOffset) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ CPDF_Object *pFileLen = m_pLinearized->GetDict()->GetElement(FX_BSTRC("L"));
+ if (!pFileLen) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ FX_BOOL bNeedDownLoad = FALSE;
+ if (pEndOffSet->GetType() == PDFOBJ_NUMBER) {
+ FX_DWORD dwEnd = pEndOffSet->GetInteger();
+ dwEnd += 512;
+ if ((FX_FILESIZE)dwEnd > m_dwFileLen) {
+ dwEnd = (FX_DWORD)m_dwFileLen;
+ }
+ FX_INT32 iStartPos = (FX_INT32)(m_dwFileLen > 1024 ? 1024 : m_dwFileLen);
+ FX_INT32 iSize = dwEnd > 1024 ? dwEnd - 1024 : 0;
+ if (!m_pFileAvail->IsDataAvail(iStartPos, iSize)) {
+ pHints->AddSegment(iStartPos, iSize);
+ bNeedDownLoad = TRUE;
+ }
+ }
+ m_dwLastXRefOffset = 0;
+ FX_FILESIZE dwFileLen = 0;
+ if (pXRefOffset->GetType() == PDFOBJ_NUMBER) {
+ m_dwLastXRefOffset = pXRefOffset->GetInteger();
+ }
+ if (pFileLen->GetType() == PDFOBJ_NUMBER) {
+ dwFileLen = pFileLen->GetInteger();
+ }
+ if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset, (FX_DWORD)(dwFileLen - m_dwLastXRefOffset))) {
+ if (m_docStatus == PDF_DATAAVAIL_FIRSTPAGE) {
+ FX_DWORD dwSize = (FX_DWORD)(dwFileLen - m_dwLastXRefOffset);
+ FX_FILESIZE offset = m_dwLastXRefOffset;
+ if (dwSize < 512 && dwFileLen > 512) {
+ dwSize = 512;
+ offset = dwFileLen - 512;
+ }
+ pHints->AddSegment(offset, dwSize);
+ }
+ } else {
+ m_docStatus = PDF_DATAAVAIL_FIRSTPAGE_PREPARE;
+ }
+ if (!bNeedDownLoad && m_docStatus == PDF_DATAAVAIL_FIRSTPAGE_PREPARE) {
+ m_docStatus = PDF_DATAAVAIL_DONE;
+ return TRUE;
+ }
+ m_docStatus = PDF_DATAAVAIL_FIRSTPAGE_PREPARE;
+ return FALSE;
+}
+CPDF_Object * CPDF_DataAvail::ParseIndirectObjectAt(FX_FILESIZE pos, FX_DWORD objnum)
+{
+ FX_FILESIZE SavedPos = m_syntaxParser.SavePos();
+ m_syntaxParser.RestorePos(pos);
+ FX_BOOL bIsNumber;
+ CFX_ByteString word = m_syntaxParser.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ return NULL;
+ }
+ FX_DWORD real_objnum = FXSYS_atoi(word);
+ if (objnum && real_objnum != objnum) {
+ return NULL;
+ }
+ word = m_syntaxParser.GetNextWord(bIsNumber);
+ if (!bIsNumber) {
+ return NULL;
+ }
+ FX_DWORD gennum = FXSYS_atoi(word);
+ if (m_syntaxParser.GetKeyword() != FX_BSTRC("obj")) {
+ m_syntaxParser.RestorePos(SavedPos);
+ return NULL;
+ }
+ CPDF_Object* pObj = m_syntaxParser.GetObject(NULL, objnum, gennum, 0);
+ m_syntaxParser.RestorePos(SavedPos);
+ return pObj;
+}
+FX_INT32 CPDF_DataAvail::IsLinearizedPDF()
+{
+ FX_DWORD req_size = 1024;
+ if (!m_pFileAvail->IsDataAvail(0, req_size)) {
+ return PDF_UNKNOW_LINEARIZED;
+ }
+ if (!m_pFileRead) {
+ return PDF_NOT_LINEARIZED;
+ }
+ FX_FILESIZE dwSize = m_pFileRead->GetSize();
+ if (dwSize < (FX_FILESIZE)req_size) {
+ return PDF_UNKNOW_LINEARIZED;
+ }
+ FX_BYTE buffer[1024];
+ m_pFileRead->ReadBlock(buffer, 0, req_size);
+ if (IsLinearizedFile(buffer, req_size)) {
+ return PDF_IS_LINEARIZED;
+ }
+ return PDF_NOT_LINEARIZED;
+}
+FX_BOOL CPDF_DataAvail::IsLinearizedFile(FX_LPBYTE pData, FX_DWORD dwLen)
+{
+ CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream(pData, (size_t)dwLen, FALSE));
+ FX_INT32 offset = GetHeaderOffset((IFX_FileStream*)file);
+ if (offset == -1) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ m_dwHeaderOffset = offset;
+ m_syntaxParser.InitParser((IFX_FileStream*)file, offset);
+ m_syntaxParser.RestorePos(m_syntaxParser.m_HeaderOffset + 9);
+ FX_BOOL bNumber = FALSE;
+ FX_FILESIZE dwSavePos = m_syntaxParser.SavePos();
+ CFX_ByteString wordObjNum = m_syntaxParser.GetNextWord(bNumber);
+ if (!bNumber) {
+ return FALSE;
+ }
+ FX_DWORD objnum = FXSYS_atoi(wordObjNum);
+ if (m_pLinearized) {
+ m_pLinearized->Release();
+ m_pLinearized = NULL;
+ }
+ m_pLinearized = ParseIndirectObjectAt(m_syntaxParser.m_HeaderOffset + 9, objnum);
+ if (!m_pLinearized) {
+ return FALSE;
+ }
+ if (m_pLinearized->GetDict()->GetElement(FX_BSTRC("Linearized"))) {
+ CPDF_Object *pLen = m_pLinearized->GetDict()->GetElement(FX_BSTRC("L"));
+ if (!pLen) {
+ return FALSE;
+ }
+ if ((FX_FILESIZE)pLen->GetInteger() != m_pFileRead->GetSize()) {
+ return FALSE;
+ }
+ m_bLinearized = TRUE;
+ CPDF_Object *pNo = m_pLinearized->GetDict()->GetElement(FX_BSTRC("P"));
+ if (pNo && pNo->GetType() == PDFOBJ_NUMBER) {
+ m_dwFirstPageNo = pNo->GetInteger();
+ }
+ return TRUE;
+ }
+ 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)) {
+ FX_BYTE buffer[1024];
+ m_pFileRead->ReadBlock(buffer, req_pos, dwSize);
+ CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream(buffer, (size_t)dwSize, FALSE));
+ m_syntaxParser.InitParser((IFX_FileStream*)file, 0);
+ m_syntaxParser.RestorePos(dwSize - 1);
+ if (m_syntaxParser.SearchWord(FX_BSTRC("startxref"), TRUE, FALSE, dwSize)) {
+ FX_BOOL bNumber;
+ m_syntaxParser.GetNextWord(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;
+ } else {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ }
+ pHints->AddSegment(req_pos, dwSize);
+ return FALSE;
+}
+FX_DWORD 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)) {
+ FX_INT32 iSize = (FX_INT32)(m_Pos + req_size - m_dwCurrentXRefSteam);
+ CFX_BinaryBuf buf(iSize);
+ FX_LPBYTE pBuf = buf.GetBuffer();
+ m_pFileRead->ReadBlock(pBuf, m_dwCurrentXRefSteam, iSize);
+ CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE));
+ m_parser.m_Syntax.InitParser((IFX_FileStream*)file, 0);
+ FX_BOOL bNumber = FALSE;
+ FX_FILESIZE dwSavePos = m_parser.m_Syntax.SavePos();
+ CFX_ByteString objnum = m_parser.m_Syntax.GetNextWord(bNumber);
+ if (!bNumber) {
+ return -1;
+ }
+ FX_DWORD objNum = FXSYS_atoi(objnum);
+ CPDF_Object *pObj = m_parser.ParseIndirectObjectAt(NULL, 0, objNum, NULL);
+ if (!pObj) {
+ m_Pos += m_parser.m_Syntax.SavePos();
+ return 0;
+ }
+ CPDF_Object *pName = pObj->GetDict()->GetElement(FX_BSTRC("Type"));
+ if (pName && pName->GetType() == PDFOBJ_NAME) {
+ if (pName->GetString() == FX_BSTRC("XRef")) {
+ m_Pos += m_parser.m_Syntax.SavePos();
+ xref_offset = pObj->GetDict()->GetInteger(FX_BSTRC("Prev"));
+ pObj->Release();
+ return 1;
+ } else {
+ pObj->Release();
+ return -1;
+ }
+ }
+ pObj->Release();
+ return -1;
+ }
+ pHints->AddSegment(m_Pos, req_size);
+ return 0;
+}
+inline void CPDF_DataAvail::SetStartOffset(FX_FILESIZE dwOffset)
+{
+ m_Pos = dwOffset;
+}
+#define MAX_WORD_BUFFER 256
+FX_BOOL CPDF_DataAvail::GetNextToken(CFX_ByteString &token)
+{
+ m_WordSize = 0;
+ FX_BYTE ch;
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ FX_BYTE type = _PDF_CharType[ch];
+ while (1) {
+ while (type == 'W') {
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ type = _PDF_CharType[ch];
+ }
+ if (ch != '%') {
+ break;
+ }
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ if (ch == '\r' || ch == '\n') {
+ break;
+ }
+ }
+ type = _PDF_CharType[ch];
+ }
+ if (type == 'D') {
+ m_WordBuffer[m_WordSize++] = ch;
+ if (ch == '/') {
+ while (1) {
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ type = _PDF_CharType[ch];
+ if (type != 'R' && type != 'N') {
+ m_Pos --;
+ CFX_ByteString ret(m_WordBuffer, m_WordSize);
+ token = ret;
+ return TRUE;
+ }
+ if (m_WordSize < MAX_WORD_BUFFER) {
+ m_WordBuffer[m_WordSize++] = ch;
+ }
+ }
+ } else if (ch == '<') {
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ if (ch == '<') {
+ m_WordBuffer[m_WordSize++] = ch;
+ } else {
+ m_Pos --;
+ }
+ } else if (ch == '>') {
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ if (ch == '>') {
+ m_WordBuffer[m_WordSize++] = ch;
+ } else {
+ m_Pos --;
+ }
+ }
+ CFX_ByteString ret(m_WordBuffer, m_WordSize);
+ token = ret;
+ return TRUE;
+ }
+ while (1) {
+ if (m_WordSize < MAX_WORD_BUFFER) {
+ m_WordBuffer[m_WordSize++] = ch;
+ }
+ if (!GetNextChar(ch)) {
+ return FALSE;
+ }
+ type = _PDF_CharType[ch];
+ if (type == 'D' || type == 'W') {
+ m_Pos --;
+ break;
+ }
+ }
+ CFX_ByteString ret(m_WordBuffer, m_WordSize);
+ token = ret;
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::GetNextChar(FX_BYTE &ch)
+{
+ FX_FILESIZE pos = m_Pos;
+ 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) {
+ read_size = (FX_DWORD)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)) {
+ return FALSE;
+ }
+ m_bufferOffset = read_pos;
+ m_bufferSize = read_size;
+ }
+ ch = m_bufferData[pos - m_bufferOffset];
+ m_Pos ++;
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckCrossRefItem(IFX_DownloadHints *pHints)
+{
+ FX_INT32 iSize = 0;
+ CFX_ByteString token;
+ while (1) {
+ if (!GetNextToken(token)) {
+ iSize = (FX_INT32)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
+ pHints->AddSegment(m_Pos, iSize);
+ return FALSE;
+ }
+ if (token == "trailer") {
+ m_dwTrailerOffset = m_Pos;
+ m_docStatus = PDF_DATAAVAIL_TRAILER;
+ return TRUE;
+ }
+ }
+}
+FX_BOOL CPDF_DataAvail::CheckAllCrossRefStream(IFX_DownloadHints *pHints)
+{
+ FX_FILESIZE xref_offset = 0;
+ FX_DWORD dwRet = CheckCrossRefStream(pHints, xref_offset);
+ if (dwRet == 1) {
+ if (!xref_offset) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLCRSOSSREF;
+ } else {
+ m_dwCurrentXRefSteam = xref_offset;
+ m_Pos = xref_offset;
+ }
+ return TRUE;
+ } else if (dwRet == -1) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ }
+ return FALSE;
+}
+FX_BOOL CPDF_DataAvail::CheckCrossRef(IFX_DownloadHints* pHints)
+{
+ FX_FILESIZE dwSavePos = m_Pos;
+ FX_INT32 iSize = 0;
+ CFX_ByteString token;
+ if (!GetNextToken(token)) {
+ iSize = (FX_INT32)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
+ pHints->AddSegment(m_Pos, iSize);
+ return FALSE;
+ }
+ if (token == "xref") {
+ m_CrossOffset.InsertAt(0, m_dwXRefOffset);
+ while (1) {
+ if (!GetNextToken(token)) {
+ iSize = (FX_INT32)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
+ pHints->AddSegment(m_Pos, iSize);
+ m_docStatus = PDF_DATAAVAIL_CROSSREF_ITEM;
+ return FALSE;
+ }
+ if (token == "trailer") {
+ m_dwTrailerOffset = m_Pos;
+ m_docStatus = PDF_DATAAVAIL_TRAILER;
+ return TRUE;
+ }
+ }
+ } else {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ return TRUE;
+ }
+ return FALSE;
+}
+FX_BOOL CPDF_DataAvail::CheckTrailerAppend(IFX_DownloadHints* pHints)
+{
+ if (m_Pos < m_dwFileLen) {
+ FX_FILESIZE dwAppendPos = m_Pos + m_syntaxParser.SavePos();
+ FX_INT32 iSize = (FX_INT32)(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;
+ } else {
+ m_docStatus = PDF_DATAAVAIL_LOADALLCRSOSSREF;
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckTrailer(IFX_DownloadHints* pHints)
+{
+ FX_INT32 iTrailerSize = (FX_INT32)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
+ if (m_pFileAvail->IsDataAvail(m_Pos, iTrailerSize)) {
+ FX_INT32 iSize = (FX_INT32)(m_Pos + iTrailerSize - m_dwTrailerOffset);
+ CFX_BinaryBuf buf(iSize);
+ FX_LPBYTE pBuf = buf.GetBuffer();
+ if (!pBuf) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ if (!m_pFileRead->ReadBlock(pBuf, m_dwTrailerOffset, iSize)) {
+ return FALSE;
+ }
+ CFX_SmartPointer<IFX_FileStream> file(FX_CreateMemoryStream(pBuf, (size_t)iSize, FALSE));
+ m_syntaxParser.InitParser((IFX_FileStream*)file, 0);
+ CPDF_Object *pTrailer = m_syntaxParser.GetObject(NULL, 0, 0, 0);
+ if (!pTrailer) {
+ m_Pos += m_syntaxParser.SavePos();
+ pHints->AddSegment(m_Pos, iTrailerSize);
+ return FALSE;
+ }
+ CPDF_Dictionary *pTrailerDict = pTrailer->GetDict();
+ if (pTrailerDict) {
+ CPDF_Object *pEncrypt = pTrailerDict->GetElement("Encrypt");
+ if (pEncrypt && pEncrypt->GetType() == PDFOBJ_REFERENCE) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ pTrailer->Release();
+ return TRUE;
+ }
+ }
+ FX_DWORD xrefpos = GetDirectInteger(pTrailer->GetDict(), FX_BSTRC("Prev"));
+ if (xrefpos) {
+ m_dwPrevXRefOffset = GetDirectInteger(pTrailer->GetDict(), FX_BSTRC("XRefStm"));
+ pTrailer->Release();
+ if (m_dwPrevXRefOffset) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ } else {
+ m_dwPrevXRefOffset = xrefpos;
+ if (m_dwPrevXRefOffset >= m_dwFileLen) {
+ m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+ } else {
+ SetStartOffset(m_dwPrevXRefOffset);
+ m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
+ }
+ }
+ return TRUE;
+ } else {
+ m_dwPrevXRefOffset = 0;
+ m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
+ pTrailer->Release();
+ }
+ return TRUE;
+ }
+ pHints->AddSegment(m_Pos, iTrailerSize);
+ return FALSE;
+}
+FX_BOOL CPDF_DataAvail::CheckPage(FX_INT32 iPage, IFX_DownloadHints* pHints)
+{
+ while (TRUE) {
+ switch (m_docStatus) {
+ case PDF_DATAAVAIL_PAGETREE:
+ if (!LoadDocPages(pHints)) {
+ return FALSE;
+ }
+ break;
+ case PDF_DATAAVAIL_PAGE:
+ if (!LoadDocPage(iPage, pHints)) {
+ return FALSE;
+ }
+ break;
+ case PDF_DATAAVAIL_ERROR:
+ return LoadAllFile(pHints);
+ default:
+ m_bPagesTreeLoad = TRUE;
+ m_bPagesLoad = TRUE;
+ m_bCurPageDictLoadOK = TRUE;
+ m_docStatus = PDF_DATAAVAIL_PAGE;
+ return TRUE;
+ }
+ }
+}
+FX_BOOL CPDF_DataAvail::CheckArrayPageNode(FX_DWORD dwPageNo, CPDF_PageNode *pPageNode, IFX_DownloadHints* pHints)
+{
+ FX_BOOL bExist = FALSE;
+ CPDF_Object *pPages = GetObject(dwPageNo, pHints, &bExist);
+ if (!bExist) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ if (!pPages) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ return FALSE;
+ }
+ if (pPages->GetType() != PDFOBJ_ARRAY) {
+ pPages->Release();
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ pPageNode->m_type = PDF_PAGENODE_PAGES;
+ CPDF_Array* pArray = (CPDF_Array*)pPages;
+ for (FX_DWORD i = 0; i < pArray->GetCount(); ++i) {
+ CPDF_Object *pKid = (CPDF_Object *)pArray->GetElement(i);
+ if (!pKid || pKid->GetType() != PDFOBJ_REFERENCE) {
+ continue;
+ }
+ CPDF_PageNode *pNode = FX_NEW CPDF_PageNode();
+ pPageNode->m_childNode.Add(pNode);
+ pNode->m_dwPageNo = ((CPDF_Reference*)pKid)->GetRefObjNum();
+ }
+ pPages->Release();
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckUnkownPageNode(FX_DWORD dwPageNo, CPDF_PageNode *pPageNode, IFX_DownloadHints* pHints)
+{
+ FX_BOOL bExist = FALSE;
+ CPDF_Object *pPage = GetObject(dwPageNo, pHints, &bExist);
+ if (!bExist) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ if (!pPage) {
+ if (m_docStatus == PDF_DATAAVAIL_ERROR) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ return FALSE;
+ }
+ if (pPage->GetType() == PDFOBJ_ARRAY) {
+ pPageNode->m_dwPageNo = dwPageNo;
+ pPageNode->m_type = PDF_PAGENODE_ARRAY;
+ pPage->Release();
+ return TRUE;
+ }
+ if (pPage->GetType() != PDFOBJ_DICTIONARY) {
+ pPage->Release();
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ pPageNode->m_dwPageNo = dwPageNo;
+ CFX_ByteString type = pPage->GetDict()->GetString(FX_BSTRC("Type"));
+ if (type == FX_BSTRC("Pages")) {
+ pPageNode->m_type = PDF_PAGENODE_PAGES;
+ CPDF_Object *pKids = pPage->GetDict()->GetElement(FX_BSTRC("Kids"));
+ if (!pKids) {
+ m_docStatus = PDF_DATAAVAIL_PAGE;
+ return TRUE;
+ }
+ switch (pKids->GetType()) {
+ case PDFOBJ_REFERENCE: {
+ CPDF_Reference *pKid = (CPDF_Reference *)pKids;
+ CPDF_PageNode *pNode = FX_NEW CPDF_PageNode();
+ pPageNode->m_childNode.Add(pNode);
+ pNode->m_dwPageNo = pKid->GetRefObjNum();
+ }
+ break;
+ case PDFOBJ_ARRAY: {
+ CPDF_Array *pKidsArray = (CPDF_Array *)pKids;
+ for (FX_DWORD i = 0; i < pKidsArray->GetCount(); ++i) {
+ CPDF_Object *pKid = (CPDF_Object *)pKidsArray->GetElement(i);
+ if (!pKid || pKid->GetType() != PDFOBJ_REFERENCE) {
+ continue;
+ }
+ CPDF_PageNode *pNode = FX_NEW CPDF_PageNode();
+ pPageNode->m_childNode.Add(pNode);
+ pNode->m_dwPageNo = ((CPDF_Reference*)pKid)->GetRefObjNum();
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ } else if (type == FX_BSTRC("Page")) {
+ pPageNode->m_type = PDF_PAGENODE_PAGE;
+ } else {
+ pPage->Release();
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ pPage->Release();
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckPageNode(CPDF_PageNode &pageNodes, FX_INT32 iPage, FX_INT32 &iCount, IFX_DownloadHints* pHints)
+{
+ FX_INT32 iSize = pageNodes.m_childNode.GetSize();
+ if (!iSize) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ for (FX_INT32 i = 0; i < iSize; ++i) {
+ CPDF_PageNode *pNode = (CPDF_PageNode*)pageNodes.m_childNode.GetAt(i);
+ if (!pNode) {
+ continue;
+ }
+ switch (pNode->m_type) {
+ case PDF_PAGENODE_UNKOWN:
+ if (!CheckUnkownPageNode(pNode->m_dwPageNo, pNode, pHints)) {
+ return FALSE;
+ }
+ --i;
+ break;
+ case PDF_PAGENODE_PAGE:
+ iCount++;
+ 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)) {
+ return FALSE;
+ }
+ break;
+ case PDF_PAGENODE_ARRAY:
+ if (!CheckArrayPageNode(pNode->m_dwPageNo, pNode, pHints)) {
+ return FALSE;
+ }
+ --i;
+ break;
+ }
+ if (iPage == iCount) {
+ m_docStatus = PDF_DATAAVAIL_DONE;
+ return TRUE;
+ }
+ }
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::LoadDocPage(FX_INT32 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;
+ return TRUE;
+ }
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return TRUE;
+ }
+ FX_INT32 iCount = -1;
+ return CheckPageNode(m_pageNodes, iPage, iCount, pHints);
+}
+FX_BOOL CPDF_DataAvail::CheckPageCount(IFX_DownloadHints* pHints)
+{
+ FX_BOOL bExist = FALSE;
+ CPDF_Object *pPages = GetObject(m_PagesObjNum, pHints, &bExist);
+ if (!bExist) {
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ if (!pPages) {
+ return FALSE;
+ }
+ CPDF_Dictionary* pPagesDict = pPages->GetDict();
+ if (!pPagesDict) {
+ pPages->Release();
+ m_docStatus = PDF_DATAAVAIL_ERROR;
+ return FALSE;
+ }
+ if (!pPagesDict->KeyExist(FX_BSTRC("Kids"))) {
+ pPages->Release();
+ return TRUE;
+ }
+ int count = pPagesDict->GetInteger(FX_BSTRC("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)) {
+ return FALSE;
+ }
+ if (CheckPageCount(pHints)) {
+ m_docStatus = PDF_DATAAVAIL_PAGE;
+ return TRUE;
+ } else {
+ m_bTotalLoadPageTree = TRUE;
+ }
+ return FALSE;
+}
+FX_BOOL CPDF_DataAvail::LoadPages(IFX_DownloadHints* pHints)
+{
+ while (!m_bPagesTreeLoad) {
+ if (!CheckPageStatus(pHints)) {
+ return FALSE;
+ }
+ }
+ if (m_bPagesLoad) {
+ return TRUE;
+ }
+ m_pDocument->LoadPages();
+ return FALSE;
+}
+FX_BOOL CPDF_DataAvail::CheckLinearizedData(IFX_DownloadHints* pHints)
+{
+ if (m_bLinearedDataOK) {
+ return TRUE;
+ }
+ if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset, (FX_DWORD)(m_dwFileLen - m_dwLastXRefOffset))) {
+ pHints->AddSegment(m_dwLastXRefOffset, (FX_DWORD)(m_dwFileLen - m_dwLastXRefOffset));
+ return FALSE;
+ }
+ FX_DWORD dwRet = 0;
+ if (!m_bMainXRefLoad) {
+ dwRet = ((CPDF_Parser *)m_pDocument->GetParser())->LoadLinearizedMainXRefTable();
+ if (dwRet == PDFPARSE_ERROR_SUCCESS) {
+ if (!PreparePageItem()) {
+ return FALSE;
+ }
+ m_bMainXRefLoadedOK = TRUE;
+ }
+ m_bMainXRefLoad = TRUE;
+ }
+ m_bLinearedDataOK = TRUE;
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckPageAnnots(FX_INT32 iPage, IFX_DownloadHints* pHints)
+{
+ if (!m_objs_array.GetSize()) {
+ m_objs_array.RemoveAll();
+ m_objnum_array.RemoveAll();
+ CPDF_Dictionary *pPageDict = m_pDocument->GetPage(iPage);
+ if (!pPageDict) {
+ return TRUE;
+ }
+ CPDF_Object *pAnnots = pPageDict->GetElement(FX_BSTRC("Annots"));
+ if (!pAnnots) {
+ return TRUE;
+ }
+ CFX_PtrArray obj_array;
+ obj_array.Add(pAnnots);
+ FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
+ if (bRet) {
+ m_objs_array.RemoveAll();
+ }
+ return bRet;
+ } else {
+ CFX_PtrArray 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);
+ }
+ return bRet;
+ }
+}
+FX_BOOL CPDF_DataAvail::CheckLinearizedFirstPage(FX_INT32 iPage, IFX_DownloadHints* pHints)
+{
+ if (!m_bAnnotsLoad) {
+ if (!CheckPageAnnots(iPage, pHints)) {
+ return FALSE;
+ }
+ m_bAnnotsLoad = TRUE;
+ }
+ if (m_bAnnotsLoad)
+ if (!CheckLinearizedData(pHints)) {
+ return FALSE;
+ }
+ m_bPageLoadedOK = FALSE;
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::HaveResourceAncestor(CPDF_Dictionary *pDict)
+{
+ CPDF_Object *pParent = pDict->GetElement("Parent");
+ if (!pParent) {
+ return FALSE;
+ }
+ CPDF_Dictionary *pParentDict = pParent->GetDict();
+ if (!pParentDict) {
+ return FALSE;
+ }
+ CPDF_Object *pRet = pParentDict->GetElement("Resource");
+ if (pRet) {
+ m_pPageResource = pRet;
+ return TRUE;
+ } else {
+ return HaveResourceAncestor(pParentDict);
+ }
+}
+FX_BOOL CPDF_DataAvail::IsPageAvail(FX_INT32 iPage, IFX_DownloadHints* pHints)
+{
+ if (!m_pDocument) {
+ return FALSE;
+ }
+ if (IsFirstCheck(iPage)) {
+ m_bCurPageDictLoadOK = FALSE;
+ m_bPageLoadedOK = FALSE;
+ m_bAnnotsLoad = FALSE;
+ m_bNeedDownLoadResource = FALSE;
+ m_objs_array.RemoveAll();
+ m_objnum_array.RemoveAll();
+ }
+ if (m_pagesLoadState == NULL) {
+ m_pagesLoadState = FX_NEW CFX_CMapDWordToDWord();
+ }
+ FX_DWORD dwPageLoad = 0;
+ if (m_pagesLoadState->Lookup(iPage, dwPageLoad) && dwPageLoad != 0) {
+ return TRUE;
+ }
+ if (m_bLinearized) {
+ if ((FX_DWORD)iPage == m_dwFirstPageNo) {
+ m_pagesLoadState->SetAt(iPage, TRUE);
+ return TRUE;
+ }
+ if (!CheckLinearizedData(pHints)) {
+ return FALSE;
+ }
+ if (m_bMainXRefLoadedOK) {
+ if (m_bTotalLoadPageTree) {
+ if (!LoadPages(pHints)) {
+ return FALSE;
+ }
+ } else {
+ if (!m_bCurPageDictLoadOK && !CheckPage(iPage, pHints)) {
+ return FALSE;
+ }
+ }
+ } else {
+ if (!LoadAllFile(pHints)) {
+ return FALSE;
+ }
+ ((CPDF_Parser *)m_pDocument->GetParser())->RebuildCrossRef();
+ ResetFirstCheck(iPage);
+ return TRUE;
+ }
+ } else {
+ if (!m_bTotalLoadPageTree) {
+ if (!m_bCurPageDictLoadOK && !CheckPage(iPage, pHints)) {
+ return FALSE;
+ }
+ }
+ }
+ if (m_bHaveAcroForm && !m_bAcroFormLoad) {
+ if (!CheckAcroFormSubObject(pHints)) {
+ return FALSE;
+ }
+ m_bAcroFormLoad = TRUE;
+ }
+ if (!m_bPageLoadedOK) {
+ if (!m_objs_array.GetSize()) {
+ m_objs_array.RemoveAll();
+ m_objnum_array.RemoveAll();
+ m_pPageDict = m_pDocument->GetPage(iPage);
+ if (!m_pPageDict) {
+ ResetFirstCheck(iPage);
+ return TRUE;
+ }
+ CFX_PtrArray obj_array;
+ obj_array.Add(m_pPageDict);
+ FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
+ if (bRet) {
+ m_objs_array.RemoveAll();
+ m_bPageLoadedOK = TRUE;
+ } else {
+ return bRet;
+ }
+ } else {
+ CFX_PtrArray new_objs_array;
+ FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
+ m_objs_array.RemoveAll();
+ if (bRet) {
+ m_bPageLoadedOK = TRUE;
+ } else {
+ m_objs_array.Append(new_objs_array);
+ return bRet;
+ }
+ }
+ }
+ if (m_bPageLoadedOK) {
+ if (!m_bAnnotsLoad) {
+ if (!CheckPageAnnots(iPage, pHints)) {
+ return FALSE;
+ }
+ m_bAnnotsLoad = TRUE;
+ }
+ }
+ if (m_pPageDict && !m_bNeedDownLoadResource) {
+ CPDF_Object *pRes = m_pPageDict->GetElement("Resource");
+ if (!pRes) {
+ m_bNeedDownLoadResource = HaveResourceAncestor(m_pPageDict);
+ }
+ m_bNeedDownLoadResource = FALSE;
+ }
+ if (m_bNeedDownLoadResource) {
+ FX_BOOL bRet = CheckResources(pHints);
+ if (!bRet) {
+ return FALSE;
+ }
+ m_bNeedDownLoadResource = FALSE;
+ }
+ m_bPageLoadedOK = FALSE;
+ m_bAnnotsLoad = FALSE;
+ m_bCurPageDictLoadOK = FALSE;
+ ResetFirstCheck(iPage);
+ m_pagesLoadState->SetAt(iPage, TRUE);
+ return TRUE;
+}
+FX_BOOL CPDF_DataAvail::CheckResources(IFX_DownloadHints* pHints)
+{
+ if (!m_objs_array.GetSize()) {
+ m_objs_array.RemoveAll();
+ CFX_PtrArray obj_array;
+ obj_array.Add(m_pPageResource);
+ FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
+ if (bRet) {
+ m_objs_array.RemoveAll();
+ }
+ return bRet;
+ } else {
+ CFX_PtrArray 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);
+ }
+ return bRet;
+ }
+}
+void CPDF_DataAvail::GetLinearizedMainXRefInfo(FX_FILESIZE *pPos, FX_DWORD *pSize)
+{
+ if (pPos) {
+ *pPos = m_dwLastXRefOffset;
+ }
+ if (pSize) {
+ *pSize = (FX_DWORD)(m_dwFileLen - m_dwLastXRefOffset);
+ }
+}
+FX_INT32 CPDF_DataAvail::IsFormAvail(IFX_DownloadHints *pHints)
+{
+ if (!m_pDocument) {
+ return PDFFORM_AVAIL;
+ }
+ if (!m_bLinearizedFormParamLoad) {
+ CPDF_Dictionary *pRoot = m_pDocument->GetRoot();
+ if (!pRoot) {
+ return PDFFORM_AVAIL;
+ }
+ CPDF_Object *pAcroForm = pRoot->GetElement(FX_BSTRC("AcroForm"));
+ if (!pAcroForm) {
+ return PDFFORM_NOTEXIST;
+ }
+ if (!m_bMainXRefLoad && !CheckLinearizedData(pHints)) {
+ return PDFFORM_NOTAVAIL;
+ }
+ if (!m_objs_array.GetSize()) {
+ m_objs_array.Add(pAcroForm->GetDict());
+ }
+ m_bLinearizedFormParamLoad = TRUE;
+ }
+ CFX_PtrArray 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);
+ return PDFFORM_NOTAVAIL;
+ }
+ return PDFFORM_AVAIL;
+}
+void CPDF_SortObjNumArray::AddObjNum(FX_DWORD dwObjNum)
+{
+ FX_INT32 iNext = 0;
+ if (BinarySearch(dwObjNum, iNext)) {
+ return;
+ }
+ m_number_array.InsertAt(iNext, dwObjNum);
+}
+FX_BOOL CPDF_SortObjNumArray::Find(FX_DWORD dwObjNum)
+{
+ FX_INT32 iNext = 0;
+ return BinarySearch(dwObjNum, iNext);
+}
+FX_BOOL CPDF_SortObjNumArray::BinarySearch(FX_DWORD value, FX_INT32 &iNext)
+{
+ FX_INT32 iLen = m_number_array.GetSize();
+ FX_INT32 iLow = 0;
+ FX_INT32 iHigh = iLen - 1;
+ FX_INT32 iMid = 0;
+ while (iLow <= iHigh) {
+ iMid = (iLow + iHigh) / 2;
+ FX_DWORD tt = m_number_array.GetAt(iMid);
+ if (m_number_array.GetAt(iMid) == value) {
+ iNext = iMid;
+ return TRUE;
+ } else if (m_number_array.GetAt(iMid) > value) {
+ iHigh = iMid - 1;
+ } else if (m_number_array.GetAt(iMid) < value) {
+ iLow = iMid + 1;
+ }
+ }
+ iNext = iLow;
+ return FALSE;
+}
+CPDF_PageNode::~CPDF_PageNode()
+{
+ FX_INT32 iSize = m_childNode.GetSize();
+ for (FX_INT32 i = 0; i < iSize; ++i) {
+ CPDF_PageNode *pNode = (CPDF_PageNode*)m_childNode[i];
+ if (pNode) {
+ delete pNode;
+ }
+ }
+ m_childNode.RemoveAll();
+}
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