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-rw-r--r--core/fpdfapi/parser/cpdf_data_avail.cpp32
-rw-r--r--core/fpdfapi/parser/cpdf_data_avail.h8
-rw-r--r--core/fpdfapi/parser/cpdf_read_validator.cpp24
-rw-r--r--core/fpdfapi/parser/cpdf_read_validator.h6
4 files changed, 49 insertions, 21 deletions
diff --git a/core/fpdfapi/parser/cpdf_data_avail.cpp b/core/fpdfapi/parser/cpdf_data_avail.cpp
index 234a5a0b19..9d6b2f4bef 100644
--- a/core/fpdfapi/parser/cpdf_data_avail.cpp
+++ b/core/fpdfapi/parser/cpdf_data_avail.cpp
@@ -281,7 +281,7 @@ bool CPDF_DataAvail::CheckDocStatus(DownloadHints* pHints) {
case PDF_DATAAVAIL_LOADALLCROSSREF:
return LoadAllXref(pHints);
case PDF_DATAAVAIL_LOADALLFILE:
- return LoadAllFile(pHints);
+ return LoadAllFile();
case PDF_DATAAVAIL_ROOT:
return CheckRoot();
case PDF_DATAAVAIL_INFO:
@@ -298,7 +298,7 @@ bool CPDF_DataAvail::CheckDocStatus(DownloadHints* pHints) {
m_docStatus = PDF_DATAAVAIL_PAGE_LATERLOAD;
return true;
case PDF_DATAAVAIL_ERROR:
- return LoadAllFile(pHints);
+ return LoadAllFile();
case PDF_DATAAVAIL_PAGE_LATERLOAD:
m_docStatus = PDF_DATAAVAIL_PAGE;
default:
@@ -307,14 +307,14 @@ bool CPDF_DataAvail::CheckDocStatus(DownloadHints* pHints) {
}
}
-bool CPDF_DataAvail::CheckPageStatus(DownloadHints* pHints) {
+bool CPDF_DataAvail::CheckPageStatus() {
switch (m_docStatus) {
case PDF_DATAAVAIL_PAGETREE:
return CheckPages();
case PDF_DATAAVAIL_PAGE:
return CheckPage();
case PDF_DATAAVAIL_ERROR:
- return LoadAllFile(pHints);
+ return LoadAllFile();
default:
m_bPagesTreeLoad = true;
m_bPagesLoad = true;
@@ -322,13 +322,12 @@ bool CPDF_DataAvail::CheckPageStatus(DownloadHints* pHints) {
}
}
-bool CPDF_DataAvail::LoadAllFile(DownloadHints* pHints) {
- if (m_pFileAvail->IsDataAvail(0, (uint32_t)m_dwFileLen)) {
+bool CPDF_DataAvail::LoadAllFile() {
+ if (GetValidator()->IsWholeFileAvailable()) {
m_docStatus = PDF_DATAAVAIL_DONE;
return true;
}
-
- pHints->AddSegment(0, (uint32_t)m_dwFileLen);
+ GetValidator()->ScheduleDownloadWholeFile();
return false;
}
@@ -1001,7 +1000,7 @@ bool CPDF_DataAvail::CheckTrailer(DownloadHints* pHints) {
return true;
}
-bool CPDF_DataAvail::CheckPage(uint32_t dwPage, DownloadHints* pHints) {
+bool CPDF_DataAvail::CheckPage(uint32_t dwPage) {
while (true) {
switch (m_docStatus) {
case PDF_DATAAVAIL_PAGETREE:
@@ -1013,7 +1012,7 @@ bool CPDF_DataAvail::CheckPage(uint32_t dwPage, DownloadHints* pHints) {
return false;
break;
case PDF_DATAAVAIL_ERROR:
- return LoadAllFile(pHints);
+ return LoadAllFile();
default:
m_bPagesTreeLoad = true;
m_bPagesLoad = true;
@@ -1225,9 +1224,9 @@ bool CPDF_DataAvail::LoadDocPages() {
return false;
}
-bool CPDF_DataAvail::LoadPages(DownloadHints* pHints) {
+bool CPDF_DataAvail::LoadPages() {
while (!m_bPagesTreeLoad) {
- if (!CheckPageStatus(pHints))
+ if (!CheckPageStatus())
return false;
}
@@ -1359,22 +1358,21 @@ CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
}
if (!m_bMainXRefLoadedOK) {
- if (!LoadAllFile(pHints))
+ if (!LoadAllFile())
return DataNotAvailable;
m_pDocument->GetParser()->RebuildCrossRef();
ResetFirstCheck(dwPage);
return DataAvailable;
}
if (m_bTotalLoadPageTree) {
- if (!LoadPages(pHints))
+ if (!LoadPages())
return DataNotAvailable;
} else {
- if (!m_bCurPageDictLoadOK && !CheckPage(dwPage, pHints))
+ if (!m_bCurPageDictLoadOK && !CheckPage(dwPage))
return DataNotAvailable;
}
} else {
- if (!m_bTotalLoadPageTree && !m_bCurPageDictLoadOK &&
- !CheckPage(dwPage, pHints)) {
+ if (!m_bTotalLoadPageTree && !m_bCurPageDictLoadOK && !CheckPage(dwPage)) {
return DataNotAvailable;
}
}
diff --git a/core/fpdfapi/parser/cpdf_data_avail.h b/core/fpdfapi/parser/cpdf_data_avail.h
index e704e12900..57fcc96eb7 100644
--- a/core/fpdfapi/parser/cpdf_data_avail.h
+++ b/core/fpdfapi/parser/cpdf_data_avail.h
@@ -144,7 +144,7 @@ class CPDF_DataAvail final {
bool CheckAcroForm();
bool CheckAcroFormSubObject();
bool CheckTrailerAppend(DownloadHints* pHints);
- bool CheckPageStatus(DownloadHints* pHints);
+ bool CheckPageStatus();
bool IsLinearizedFile(uint8_t* pData, uint32_t dwLen);
void SetStartOffset(FX_FILESIZE dwOffset);
@@ -158,14 +158,14 @@ class CPDF_DataAvail final {
bool* pExistInFile);
bool GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages);
bool PreparePageItem();
- bool LoadPages(DownloadHints* pHints);
+ bool LoadPages();
bool LoadAllXref(DownloadHints* pHints);
- bool LoadAllFile(DownloadHints* pHints);
+ bool LoadAllFile();
DocAvailStatus CheckLinearizedData(DownloadHints* pHints);
bool CheckPageAnnots(uint32_t dwPage);
DocAvailStatus CheckLinearizedFirstPage(uint32_t dwPage);
- bool CheckPage(uint32_t dwPage, DownloadHints* pHints);
+ bool CheckPage(uint32_t dwPage);
bool LoadDocPages();
bool LoadDocPage(uint32_t dwPage);
bool CheckPageNode(const PageNode& pageNode,
diff --git a/core/fpdfapi/parser/cpdf_read_validator.cpp b/core/fpdfapi/parser/cpdf_read_validator.cpp
index be20f18f33..d01b3c61e6 100644
--- a/core/fpdfapi/parser/cpdf_read_validator.cpp
+++ b/core/fpdfapi/parser/cpdf_read_validator.cpp
@@ -84,6 +84,13 @@ FX_FILESIZE CPDF_ReadValidator::GetSize() {
}
void CPDF_ReadValidator::ScheduleDownload(FX_FILESIZE offset, size_t size) {
+ const FX_SAFE_UINT32 safe_size = size;
+ if (safe_size.IsValid())
+ ScheduleDataDownload(offset, safe_size.ValueOrDie());
+}
+
+void CPDF_ReadValidator::ScheduleDataDownload(FX_FILESIZE offset,
+ uint32_t size) {
if (!hints_ || size == 0)
return;
@@ -105,3 +112,20 @@ void CPDF_ReadValidator::ScheduleDownload(FX_FILESIZE offset, size_t size) {
}
hints_->AddSegment(start_segment_offset, segment_size.ValueOrDie());
}
+
+void CPDF_ReadValidator::ScheduleDownloadWholeFile() {
+ const FX_SAFE_UINT32 safe_size = GetSize();
+ if (safe_size.IsValid())
+ ScheduleDataDownload(0, safe_size.ValueOrDie());
+}
+
+bool CPDF_ReadValidator::IsDataRangeAvailable(FX_FILESIZE offset,
+ uint32_t size) const {
+ return !file_avail_ || file_avail_->IsDataAvail(offset, size);
+}
+
+bool CPDF_ReadValidator::IsWholeFileAvailable() {
+ const FX_SAFE_UINT32 safe_size = GetSize();
+ return safe_size.IsValid() ? IsDataRangeAvailable(0, safe_size.ValueOrDie())
+ : false;
+}
diff --git a/core/fpdfapi/parser/cpdf_read_validator.h b/core/fpdfapi/parser/cpdf_read_validator.h
index 9cc22c1ccc..106f6e437b 100644
--- a/core/fpdfapi/parser/cpdf_read_validator.h
+++ b/core/fpdfapi/parser/cpdf_read_validator.h
@@ -36,6 +36,12 @@ class CPDF_ReadValidator : public IFX_SeekableReadStream {
void ResetErrors();
+ bool IsDataRangeAvailable(FX_FILESIZE offset, uint32_t size) const;
+ bool IsWholeFileAvailable();
+
+ void ScheduleDataDownload(FX_FILESIZE offset, uint32_t size);
+ void ScheduleDownloadWholeFile();
+
// IFX_SeekableReadStream overrides:
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
FX_FILESIZE GetSize() override;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 20:00:46 +0000