6 files changed, 9 insertions, 7 deletions
diff --git a/fpdfsdk/cpdfsdk_customaccess.cpp b/fpdfsdk/cpdfsdk_customaccess.cpp
index 0545ae44fa..9a16a873ae 100644
--- a/fpdfsdk/cpdfsdk_customaccess.cpp
+++ b/fpdfsdk/cpdfsdk_customaccess.cpp
@@ -9,6 +9,8 @@
 CPDFSDK_CustomAccess::CPDFSDK_CustomAccess(FPDF_FILEACCESS* pFileAccess)
     : m_FileAccess(*pFileAccess) {}
 
+CPDFSDK_CustomAccess::~CPDFSDK_CustomAccess() = default;
+
 FX_FILESIZE CPDFSDK_CustomAccess::GetSize() {
   return m_FileAccess.m_FileLen;
 }
diff --git a/fpdfsdk/cpdfsdk_customaccess.h b/fpdfsdk/cpdfsdk_customaccess.h
index dabbdf2b39..cc38eb88f4 100644
--- a/fpdfsdk/cpdfsdk_customaccess.h
+++ b/fpdfsdk/cpdfsdk_customaccess.h
@@ -21,6 +21,7 @@ class CPDFSDK_CustomAccess final : public IFX_SeekableReadStream {
 
  private:
   explicit CPDFSDK_CustomAccess(FPDF_FILEACCESS* pFileAccess);
+  ~CPDFSDK_CustomAccess() override;
 
   FPDF_FILEACCESS m_FileAccess;
 };
diff --git a/fpdfsdk/cpdfsdk_filewriteadapter.h b/fpdfsdk/cpdfsdk_filewriteadapter.h
index a5b4dc89f9..e452d1cc20 100644
--- a/fpdfsdk/cpdfsdk_filewriteadapter.h
+++ b/fpdfsdk/cpdfsdk_filewriteadapter.h
@@ -16,6 +16,7 @@ class CPDFSDK_FileWriteAdapter : public IFX_WriteStream {
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
 
+  // IFX_WriteStream:
   bool WriteBlock(const void* data, size_t size) override;
   bool WriteString(const ByteStringView& str) override;
 
diff --git a/fpdfsdk/cpdfsdk_helpers.cpp b/fpdfsdk/cpdfsdk_helpers.cpp
index 5498909c32..0836325263 100644
--- a/fpdfsdk/cpdfsdk_helpers.cpp
+++ b/fpdfsdk/cpdfsdk_helpers.cpp
@@ -43,8 +43,6 @@ class FPDF_FileHandlerContext : public IFX_SeekableStream {
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
 
-  ~FPDF_FileHandlerContext() override;
-
   // IFX_SeekableStream:
   FX_FILESIZE GetSize() override;
   bool IsEOF() override;
@@ -58,6 +56,7 @@ class FPDF_FileHandlerContext : public IFX_SeekableStream {
 
  protected:
   explicit FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS);
+  ~FPDF_FileHandlerContext() override;
 
   FPDF_FILEHANDLER* m_pFS;
   FX_FILESIZE m_nCurPos;
diff --git a/fpdfsdk/cpdfsdk_memoryaccess.h b/fpdfsdk/cpdfsdk_memoryaccess.h
index 9d5a365804..ed9c80acb5 100644
--- a/fpdfsdk/cpdfsdk_memoryaccess.h
+++ b/fpdfsdk/cpdfsdk_memoryaccess.h
@@ -14,13 +14,13 @@ class CPDFSDK_MemoryAccess final : public IFX_SeekableReadStream {
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
 
-  ~CPDFSDK_MemoryAccess() override;
-
+  // IFX_SeekableReadStream:
   FX_FILESIZE GetSize() override;
   bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override;
 
  private:
   CPDFSDK_MemoryAccess(const uint8_t* pBuf, FX_FILESIZE size);
+  ~CPDFSDK_MemoryAccess() override;
 
   const uint8_t* const m_pBuf;
   const FX_FILESIZE m_size;
diff --git a/fpdfsdk/fpdf_dataavail.cpp b/fpdfsdk/fpdf_dataavail.cpp
index 55d39a0d46..6f201d69f1 100644
--- a/fpdfsdk/fpdf_dataavail.cpp
+++ b/fpdfsdk/fpdf_dataavail.cpp
@@ -64,8 +64,6 @@ class FPDF_FileAccessContext : public IFX_SeekableReadStream {
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
 
-  ~FPDF_FileAccessContext() override {}
-
   void Set(FPDF_FILEACCESS* pFile) { m_pFileAccess = pFile; }
 
   // IFX_SeekableReadStream
@@ -73,11 +71,12 @@ class FPDF_FileAccessContext : public IFX_SeekableReadStream {
 
   bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
     return !!m_pFileAccess->m_GetBlock(m_pFileAccess->m_Param, offset,
-                                       (uint8_t*)buffer, size);
+                                       static_cast<uint8_t*>(buffer), size);
   }
 
  private:
   FPDF_FileAccessContext() : m_pFileAccess(nullptr) {}
+  ~FPDF_FileAccessContext() override = default;
 
   FPDF_FILEACCESS* m_pFileAccess;
 };