Use unowned ptr in cpdf_stream_acc

Change-Id: Ide081e462c83a5a209a2e6462dd12b298993f36f
Reviewed-on: https://pdfium-review.googlesource.com/36850
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

3 files changed, 9 insertions, 8 deletions

diff --git a/core/fpdfapi/parser/cpdf_stream_acc.h b/core/fpdfapi/parser/cpdf_stream_acc.h
index 00bd353fcb..5d18723df5 100644
--- a/core/fpdfapi/parser/cpdf_stream_acc.h
+++ b/core/fpdfapi/parser/cpdf_stream_acc.h
@@ -37,7 +37,7 @@ class CPDF_StreamAcc : public Retainable {
     return pdfium::make_span(GetData(), GetSize());
   }
   ByteString GetImageDecoder() const { return m_ImageDecoder; }
-  const CPDF_Dictionary* GetImageParam() const { return m_pImageParam; }
+  const CPDF_Dictionary* GetImageParam() const { return m_pImageParam.Get(); }
   std::unique_ptr<uint8_t, FxFreeDeleter> DetachData();
 
  protected:
@@ -49,7 +49,7 @@ class CPDF_StreamAcc : public Retainable {
   uint32_t m_dwSize = 0;
   bool m_bNewBuf = false;
   ByteString m_ImageDecoder;
-  const CPDF_Dictionary* m_pImageParam = nullptr;
+  UnownedPtr<const CPDF_Dictionary> m_pImageParam;
   UnownedPtr<const CPDF_Stream> const m_pStream;
   uint8_t* m_pSrcData = nullptr;
 };
diff --git a/core/fpdfapi/parser/fpdf_parser_decode.cpp b/core/fpdfapi/parser/fpdf_parser_decode.cpp
index 0ca9b4eab2..82d84ab705 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode.cpp
+++ b/core/fpdfapi/parser/fpdf_parser_decode.cpp
@@ -339,7 +339,7 @@ bool PDF_DataDecode(const uint8_t* src_buf,
                     uint8_t** dest_buf,
                     uint32_t* dest_size,
                     ByteString* ImageEncoding,
-                    const CPDF_Dictionary** pImageParms) {
+                    UnownedPtr<const CPDF_Dictionary>* pImageParams) {
   const CPDF_Object* pDecoder =
       pDict ? pDict->GetDirectObjectFor("Filter") : nullptr;
   if (!pDecoder || (!pDecoder->IsArray() && !pDecoder->IsName()))
@@ -377,7 +377,7 @@ bool PDF_DataDecode(const uint8_t* src_buf,
         *ImageEncoding = "FlateDecode";
         *dest_buf = last_buf;
         *dest_size = last_size;
-        *pImageParms = pParam;
+        *pImageParams = pParam;
         return true;
       }
       offset = FPDFAPI_FlateOrLZWDecode(false, last_buf, last_size, pParam,
@@ -394,7 +394,7 @@ bool PDF_DataDecode(const uint8_t* src_buf,
         *ImageEncoding = "RunLengthDecode";
         *dest_buf = last_buf;
         *dest_size = last_size;
-        *pImageParms = pParam;
+        *pImageParams = pParam;
         return true;
       }
       offset = RunLengthDecode(last_buf, last_size, &new_buf, &new_size);
@@ -405,7 +405,7 @@ bool PDF_DataDecode(const uint8_t* src_buf,
       else if (decoder == "CCF")
         decoder = "CCITTFaxDecode";
       *ImageEncoding = std::move(decoder);
-      *pImageParms = pParam;
+      *pImageParams = pParam;
       *dest_buf = last_buf;
       *dest_size = last_size;
       return true;
@@ -420,7 +420,7 @@ bool PDF_DataDecode(const uint8_t* src_buf,
     last_size = new_size;
   }
   ImageEncoding->clear();
-  *pImageParms = nullptr;
+  *pImageParams = nullptr;
   *dest_buf = last_buf;
   *dest_size = last_size;
   return true;
diff --git a/core/fpdfapi/parser/fpdf_parser_decode.h b/core/fpdfapi/parser/fpdf_parser_decode.h
index c0f636a231..328fd474c6 100644
--- a/core/fpdfapi/parser/fpdf_parser_decode.h
+++ b/core/fpdfapi/parser/fpdf_parser_decode.h
@@ -10,6 +10,7 @@
 #include <memory>
 
 #include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/unowned_ptr.h"
 
 class CCodec_ScanlineDecoder;
 class CPDF_Dictionary;
@@ -80,6 +81,6 @@ bool PDF_DataDecode(const uint8_t* src_buf,
                     uint8_t** dest_buf,
                     uint32_t* dest_size,
                     ByteString* ImageEncoding,
-                    const CPDF_Dictionary** pImageParms);
+                    UnownedPtr<const CPDF_Dictionary>* pImageParms);
 
 #endif  // CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_