Fix offset outside bounds of constant string warnings
BUG=380476
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1061013003
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index 7c3253f..c6383e5 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -627,13 +627,12 @@
}
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);
@@ -894,7 +893,6 @@
} else {
pObj->Release();
}
- bInUpdate = TRUE;
}
}
}
@@ -1400,10 +1398,10 @@
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) {
@@ -2158,8 +2156,6 @@
return pRet;
}
if (word == FX_BSTRC("<<")) {
- FX_FILESIZE saveDictOffset = m_Pos - 2;
- FX_DWORD dwDictSize = 0;
if (bTypeOnly) {
return (CPDF_Object*)PDFOBJ_DICTIONARY;
}
@@ -2179,11 +2175,9 @@
}
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;
}
@@ -2330,8 +2324,9 @@
if (m_WordBuffer[0] == ']') {
return pArray;
}
- if (pArray)
+ if (pArray) {
pArray->Release();
+ }
return NULL;
}
pArray->Add(pObj);
@@ -2356,8 +2351,9 @@
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(">>")) {
@@ -2373,8 +2369,9 @@
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)) {
@@ -2386,11 +2383,9 @@
}
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;
@@ -2406,8 +2401,9 @@
if (pStream) {
return pStream;
}
- if (pDict)
+ if (pDict) {
pDict->Release();
+ }
return NULL;
} else {
m_Pos = SavedPos;
@@ -2772,7 +2768,7 @@
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);
@@ -3789,7 +3785,7 @@
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);
@@ -3966,8 +3962,8 @@
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 {
@@ -3975,7 +3971,7 @@
m_Pos = xref_offset;
}
return TRUE;
- } else if (dwRet == -1) {
+ } else if (nRet == -1) {
m_docStatus = PDF_DATAAVAIL_ERROR;
}
return FALSE;
