some more header inclusion reduction

Author: neheb

src/helper_functions.hpp

@@ -3,6 +3,7 @@
 #ifndef HELPER_FUNCTIONS_HPP
 #define HELPER_FUNCTIONS_HPP
 
+#include <cstdint>
 #include <memory>
 #include <string>
 

src/makernote_int.hpp

@@ -7,6 +7,8 @@
 // included header files
 #include "tags.hpp"
 
+#include <memory>
+
 // namespace extensions
 namespace Exiv2::Internal {
 class IoWrapper;

src/pentaxmn_int.cpp

@@ -8,6 +8,7 @@
 #include "image_int.hpp"
 #include "makernote_int.hpp"
 #include "tags.hpp"
+#include "tags_int.hpp"
 #include "types.hpp"
 #include "value.hpp"
 

src/pentaxmn_int.hpp

@@ -3,16 +3,16 @@
 #ifndef PENTAXMN_INT_HPP_
 #define PENTAXMN_INT_HPP_
 
-// *****************************************************************************
-// included header files
-#include "types.hpp"
-#include "value.hpp"
-
-#include "tags_int.hpp"
+#include <iosfwd>
 
 // *****************************************************************************
 // namespace extensions
-namespace Exiv2::Internal {
+namespace Exiv2 {
+struct TagInfo;
+class ExifData;
+class Value;
+
+namespace Internal {
 // *****************************************************************************
 // class definitions
 
@@ -52,6 +52,7 @@ class PentaxMakerNote {
   static const TagInfo tagInfo_[];
 };  // class PentaxMakerNote
 
-}  // namespace Exiv2::Internal
+}  // namespace Internal
+}  // namespace Exiv2
 
 #endif  // #ifndef PENTAXMN_INT_HPP_

src/tags_int.cpp

@@ -5,7 +5,6 @@
 
 #include "convert.hpp"
 #include "enforce.hpp"
-#include "error.hpp"
 #include "i18n.h"  // NLS support.
 
 #include "canonmn_int.hpp"

src/tags_int.hpp

@@ -5,11 +5,7 @@
 
 // *****************************************************************************
 // included header files
-#include "error.hpp"
 #include "tags.hpp"
-#include "types.hpp"
-
-#include <iosfwd>
 
 // *****************************************************************************
 // namespace extensions

src/tifffwd_int.hpp

@@ -8,7 +8,10 @@
 #include "tags.hpp"
 
 // + standard includes
+#include <memory>
 #include <stack>
+#include <string_view>
+#include <vector>
 
 // *****************************************************************************
 // Exiv2 namespace extensions