Mark non-ABI symbols in exported class with QPDF_DLL_PRIVATE

TODO

@@ -30,31 +30,17 @@ Misc
   encryption dictionary normally.
 * Have a warn in QPDF that passes its variable arguments onto QPDFExc
   so you don't have to do warn(QPDFExc(...))
+* Nice to have:
+  * Split qpdf.test into multiple tests
+  * Rework tests so that nothing is written into the source directory.
+  * Ideally then the entire build could be done with a read-only
+    source tree.
 
 Soon: Break ground on "Document-level work"
 
 cmake
 =====
 
-* DLL.h
-  * The effect of QPDF_DLL_CLASS is to export everything in the class,
-    not just the vtable. On MSVC, we don't need this as the vtable
-    gets exported automatically when needed. With gcc, we need it to
-    export typeinfo and vtable. Whenever QPDF_DLL_CLASS is defined,
-    also define QPDF_DLL_LOCAL to __attribute__
-    ((visibility("hidden"))). Then add QPDF_DLL_LOCAL to everything in
-    QPDF_DLL_CLASS that is not marked with QPDF_DLL. The effect is
-    that, with MSVC, only methods are marked QPDF_DLL are public
-    because QPDF_DLL_CLASS is empty. For gcc, only methods marked
-    QPDF_DLL are public because QPDF_DLL_LOCAL makes the other things
-    private. See https://gcc.gnu.org/wiki/Visibility. Make sure this
-    is documented.
-  * Update "CODING RULES" in "README-maintainer" - search for QPDF_DLL
-* Nice to have:
-  * Split qpdf.test into multiple tests
-  * Rework tests so that nothing is written into the source directory.
-  * Ideally then the entire build could be done with a read-only
-    source tree.
 * pikepdf
   * https://github.com/pikepdf/pikepdf/pull/315 -- setup.py + docs
   * https://github.com/pikepdf/pikepdf/pull/316 -- setup.py only

include/qpdf/ClosedFileInputSource.hh

@@ -68,7 +68,9 @@ class QPDF_DLL_CLASS ClosedFileInputSource: public InputSource
     ClosedFileInputSource(ClosedFileInputSource const&) = delete;
     ClosedFileInputSource& operator=(ClosedFileInputSource const&) = delete;
 
+    QPDF_DLL_PRIVATE
     void before();
+    QPDF_DLL_PRIVATE
     void after();
 
     class QPDF_DLL_PRIVATE Members

include/qpdf/InputSource.hh

@@ -104,7 +104,7 @@ class QPDF_DLL_CLASS InputSource
     qpdf_offset_t last_offset;
 
   private:
-    class Members
+    class QPDF_DLL_PRIVATE Members
     {
         friend class InputSource;
 

include/qpdf/Pl_DCT.hh

@@ -70,7 +70,9 @@ class QPDF_DLL_CLASS Pl_DCT: public Pipeline
     virtual void finish();
 
   private:
+    QPDF_DLL_PRIVATE
     void compress(void* cinfo, Buffer*);
+    QPDF_DLL_PRIVATE
     void decompress(void* cinfo, Buffer*);
 
     enum action_e { a_compress, a_decompress };

include/qpdf/Pl_Flate.hh

@@ -30,7 +30,6 @@ class QPDF_DLL_CLASS Pl_Flate: public Pipeline
 {
   public:
     static unsigned int const def_bufsize = 65536;
-    static int compression_level;
 
     enum action_e { a_inflate, a_deflate };
 
@@ -61,10 +60,16 @@ class QPDF_DLL_CLASS Pl_Flate: public Pipeline
     void setWarnCallback(std::function<void(char const*, int)> callback);
 
   private:
+    QPDF_DLL_PRIVATE
     void handleData(unsigned char* data, size_t len, int flush);
+    QPDF_DLL_PRIVATE
     void checkError(char const* prefix, int error_code);
+    QPDF_DLL_PRIVATE
     void warn(char const*, int error_code);
 
+    QPDF_DLL_PRIVATE
+    static int compression_level;
+
     class QPDF_DLL_PRIVATE Members
     {
         friend class Pl_Flate;

include/qpdf/Pl_RunLength.hh

@@ -40,8 +40,11 @@ class QPDF_DLL_CLASS Pl_RunLength: public Pipeline
     virtual void finish();
 
   private:
+    QPDF_DLL_PRIVATE
     void encode(unsigned char* data, size_t len);
+    QPDF_DLL_PRIVATE
     void decode(unsigned char* data, size_t len);
+    QPDF_DLL_PRIVATE
     void flush_encode();
 
     enum state_e { st_top, st_copying, st_run };

include/qpdf/QPDFExc.hh

@@ -66,6 +66,7 @@ class QPDF_DLL_CLASS QPDFExc: public std::runtime_error
     std::string const& getMessageDetail() const;
 
   private:
+    QPDF_DLL_PRIVATE
     static std::string createWhat(
         std::string const& filename,
         std::string const& object,

include/qpdf/QPDFObject.hh

@@ -32,7 +32,7 @@
 class QPDF;
 class QPDFObjectHandle;
 
-class QPDF_DLL_CLASS QPDFObject
+class QPDFObject
 {
   public:
     QPDFObject();

include/qpdf/QPDFObjectHandle.hh

@@ -204,6 +204,7 @@ class QPDFObjectHandle
         void writeToken(QPDFTokenizer::Token const&);
 
       private:
+        QPDF_DLL_PRIVATE
         void setPipeline(Pipeline*);
 
         Pipeline* pipeline;

include/qpdf/QPDFSystemError.hh

@@ -47,6 +47,7 @@ class QPDF_DLL_CLASS QPDFSystemError: public std::runtime_error
     int getErrno() const;
 
   private:
+    QPDF_DLL_PRIVATE
     static std::string
     createWhat(std::string const& description, int system_errno);
 

include/qpdf/RandomDataProvider.hh

@@ -34,9 +34,8 @@ class QPDF_DLL_CLASS RandomDataProvider
     virtual void provideRandomData(unsigned char* data, size_t len) = 0;
 
   protected:
-    RandomDataProvider()
-    {
-    }
+    QPDF_DLL_PRIVATE
+    RandomDataProvider() = default;
 
   private:
     RandomDataProvider(RandomDataProvider const&) = delete;

qpdf/sizes.cc

@@ -33,7 +33,6 @@
 #include <qpdf/QPDFNameTreeObjectHelper.hh>
 #include <qpdf/QPDFNumberTreeObjectHelper.hh>
 #include <qpdf/QPDFObjGen.hh>
-#include <qpdf/QPDFObject.hh>
 #include <qpdf/QPDFObjectHandle.hh>
 #include <qpdf/QPDFOutlineDocumentHelper.hh>
 #include <qpdf/QPDFOutlineObjectHelper.hh>
@@ -50,10 +49,6 @@
 #define ignore_class(cls)
 #define print_size(cls) std::cout << #cls << " " << sizeof(cls) << std::endl
 
-// This is public because of QPDF_DLL_CLASS on InputSource
-// -------
-ignore_class(InputSource::Members);
-
 // These are not classes
 // -------
 ignore_class(QUtil);
@@ -105,7 +100,6 @@ main()
     print_size(QPDFNumberTreeObjectHelper);
     print_size(QPDFNumberTreeObjectHelper::iterator);
     print_size(QPDFObjGen);
-    print_size(QPDFObject);
     print_size(QPDFObjectHandle);
     print_size(QPDFObjectHandle::ParserCallbacks);
     print_size(QPDFObjectHandle::QPDFArrayItems);