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-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp16
1 files changed, 9 insertions, 7 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
index bdbb939148..e098112ba1 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp
@@ -4907,11 +4907,11 @@ int32_t CPDF_HintTables::CheckPage(int index, IFX_DownloadHints* pHints) {
if (index == nFirstAvailPage)
return IPDF_DataAvail::DataAvailable;
FX_DWORD dwLength = GetItemLength(index, m_szPageOffsetArray);
- if (!dwLength ||
- !m_pDataAvail->IsDataAvail(m_szPageOffsetArray[index], dwLength,
- pHints)) {
+ // If two pages have the same offset, it should be treated as an error.
+ if (!dwLength)
+ return IPDF_DataAvail::DataError;
+ if (!m_pDataAvail->IsDataAvail(m_szPageOffsetArray[index], dwLength, pHints))
return IPDF_DataAvail::DataNotAvailable;
- }
// Download data of shared objects in the page.
FX_DWORD offset = 0;
for (int i = 0; i < index; ++i) {
@@ -4920,7 +4920,7 @@ int32_t CPDF_HintTables::CheckPage(int index, IFX_DownloadHints* pHints) {
CPDF_Object* pFirstPageObj = m_pLinearizedDict->GetElementValue("O");
int nFirstPageObjNum = pFirstPageObj ? pFirstPageObj->GetInteger() : -1;
if (nFirstPageObjNum < 0)
- return FALSE; // TODO(thestig): Fix this and the return type.
+ return IPDF_DataAvail::DataError;
FX_DWORD dwIndex = 0;
FX_DWORD dwObjNum = 0;
for (int j = 0; j < m_dwNSharedObjsArray[index]; ++j) {
@@ -4933,8 +4933,10 @@ int32_t CPDF_HintTables::CheckPage(int index, IFX_DownloadHints* pHints) {
continue;
}
dwLength = GetItemLength(dwIndex, m_szSharedObjOffsetArray);
- if (!dwLength ||
- !m_pDataAvail->IsDataAvail(m_szSharedObjOffsetArray[dwIndex], dwLength,
+ // If two objects have the same offset, it should be treated as an error.
+ if (!dwLength)
+ return IPDF_DataAvail::DataError;
+ if (!m_pDataAvail->IsDataAvail(m_szSharedObjOffsetArray[dwIndex], dwLength,
pHints)) {
return IPDF_DataAvail::DataNotAvailable;
}