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authorJUN FANG <jun_fang@foxitsoftware.com>2015-04-15 12:00:53 -0700
committerJUN FANG <jun_fang@foxitsoftware.com>2015-04-15 12:08:38 -0700
commitc7a3f3c0e2652130cf62f0a937dd21f15d19882f (patch)
treed6ba9f9872b923738310df35513ac032bed7ea21 /core/src
parenta76c52e7327cd9ea19598fce640b6c841951b6dd (diff)
downloadpdfium-c7a3f3c0e2652130cf62f0a937dd21f15d19882f.tar.xz
Merge to XFA: Fix offset outside bounds of constant string warnings
BUG=380476 R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1061013003
Diffstat (limited to 'core/src')
-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp42
1 files changed, 19 insertions, 23 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 792846ea34..b45e23467f 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -631,13 +631,12 @@ FX_BOOL CPDF_Parser::RebuildCrossRef()
}
FX_INT32 status = 0;
FX_INT32 inside_index = 0;
- FX_DWORD objnum, gennum;
+ FX_DWORD objnum = 0, gennum = 0;
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 start_pos = 0, start_pos1 = 0;
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);
@@ -898,7 +897,6 @@ FX_BOOL CPDF_Parser::RebuildCrossRef()
} else {
pObj->Release();
}
- bInUpdate = TRUE;
}
}
}
@@ -1404,10 +1402,10 @@ CPDF_Object* CPDF_Parser::ParseIndirectObjectAt(CPDF_IndirectObjects* pObjList,
return NULL;
}
CPDF_Object* pObj = m_Syntax.GetObject(pObjList, objnum, parser_gennum, pContext);
- FX_FILESIZE endOffset = m_Syntax.SavePos();
+ m_Syntax.SavePos();
CFX_ByteString bsWord = m_Syntax.GetKeyword();
if (bsWord == FX_BSTRC("endobj")) {
- endOffset = m_Syntax.SavePos();
+ m_Syntax.SavePos();
}
m_Syntax.RestorePos(SavedPos);
if (pObj) {
@@ -2162,8 +2160,6 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, FX_DWO
return pRet;
}
if (word == FX_BSTRC("<<")) {
- FX_FILESIZE saveDictOffset = m_Pos - 2;
- FX_DWORD dwDictSize = 0;
if (bTypeOnly) {
return (CPDF_Object*)PDFOBJ_DICTIONARY;
}
@@ -2183,11 +2179,9 @@ CPDF_Object* CPDF_SyntaxParser::GetObject(CPDF_IndirectObjects* pObjList, FX_DWO
}
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;
}
@@ -2334,8 +2328,9 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(CPDF_IndirectObjects* pObjList
if (m_WordBuffer[0] == ']') {
return pArray;
}
- if (pArray)
+ if (pArray) {
pArray->Release();
+ }
return NULL;
}
pArray->Add(pObj);
@@ -2360,8 +2355,9 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(CPDF_IndirectObjects* pObjList
FX_FILESIZE SavedPos = m_Pos;
CFX_ByteString key = GetNextWord(bIsNumber);
if (key.IsEmpty()) {
- if (pDict)
+ if (pDict) {
pDict->Release();
+ }
return NULL;
}
if (key == FX_BSTRC(">>")) {
@@ -2377,8 +2373,9 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(CPDF_IndirectObjects* pObjList
key = PDF_NameDecode(key);
CPDF_Object* pObj = GetObject(pObjList, objnum, gennum);
if (pObj == NULL) {
- if (pDict)
+ if (pDict) {
pDict->Release();
+ }
FX_BYTE ch;
while (1) {
if (!GetNextChar(ch)) {
@@ -2390,11 +2387,9 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(CPDF_IndirectObjects* pObjList
}
return NULL;
}
- if (key.GetLength() == 1) {
- pDict->SetAt(CFX_ByteStringC(key.c_str() + 1, key.GetLength() - 1), pObj);
- } else {
+ if (key.GetLength() > 1) {
pDict->AddValue(CFX_ByteStringC(key.c_str() + 1, key.GetLength() - 1), pObj);
- }
+ }
}
if (pContext) {
pContext->m_DictEnd = m_Pos;
@@ -2410,8 +2405,9 @@ CPDF_Object* CPDF_SyntaxParser::GetObjectByStrict(CPDF_IndirectObjects* pObjList
if (pStream) {
return pStream;
}
- if (pDict)
+ if (pDict) {
pDict->Release();
+ }
return NULL;
} else {
m_Pos = SavedPos;
@@ -2776,7 +2772,7 @@ protected:
FX_BOOL CheckPageStatus(IFX_DownloadHints* pHints);
FX_BOOL CheckAllCrossRefStream(IFX_DownloadHints *pHints);
- FX_DWORD CheckCrossRefStream(IFX_DownloadHints *pHints, FX_FILESIZE &xref_offset);
+ FX_INT32 CheckCrossRefStream(IFX_DownloadHints *pHints, FX_FILESIZE &xref_offset);
FX_BOOL IsLinearizedFile(FX_LPBYTE pData, FX_DWORD dwLen);
void SetStartOffset(FX_FILESIZE dwOffset);
FX_BOOL GetNextToken(CFX_ByteString &token);
@@ -3793,7 +3789,7 @@ FX_BOOL CPDF_DataAvail::CheckEnd(IFX_DownloadHints* pHints)
pHints->AddSegment(req_pos, dwSize);
return FALSE;
}
-FX_DWORD CPDF_DataAvail::CheckCrossRefStream(IFX_DownloadHints* pHints, FX_FILESIZE &xref_offset)
+FX_INT32 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);
@@ -3970,8 +3966,8 @@ FX_BOOL CPDF_DataAvail::CheckCrossRefItem(IFX_DownloadHints *pHints)
FX_BOOL CPDF_DataAvail::CheckAllCrossRefStream(IFX_DownloadHints *pHints)
{
FX_FILESIZE xref_offset = 0;
- FX_DWORD dwRet = CheckCrossRefStream(pHints, xref_offset);
- if (dwRet == 1) {
+ FX_INT32 nRet = CheckCrossRefStream(pHints, xref_offset);
+ if (nRet == 1) {
if (!xref_offset) {
m_docStatus = PDF_DATAAVAIL_LOADALLCRSOSSREF;
} else {
@@ -3979,7 +3975,7 @@ FX_BOOL CPDF_DataAvail::CheckAllCrossRefStream(IFX_DownloadHints *pHints)
m_Pos = xref_offset;
}
return TRUE;
- } else if (dwRet == -1) {
+ } else if (nRet == -1) {
m_docStatus = PDF_DATAAVAIL_ERROR;
}
return FALSE;