]> Creatis software - gdcm.git/blobdiff - src/gdcmDebug.h
ENH: Adding a deprecation mechanism to gdcm via two MACRO and two config options
[gdcm.git] / src / gdcmDebug.h
index 44660c097ae7a329a71c6641a394ce7da0807915..85eda8b3cae08ec08fdc3d24982d99946ff3af16 100644 (file)
@@ -3,8 +3,8 @@
   Program:   gdcm
   Module:    $RCSfile: gdcmDebug.h,v $
   Language:  C++
-  Date:      $Date: 2005/01/07 21:09:42 $
-  Version:   $Revision: 1.15 $
+  Date:      $Date: 2005/07/19 14:43:48 $
+  Version:   $Revision: 1.36 $
                                                                                 
   Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
   l'Image). All rights reserved. See Doc/License.txt or
 
 #include "gdcmCommon.h"
 
+#include <sstream>
+#include <fstream>
+#include <assert.h>
+#include <errno.h>
+
 namespace gdcm 
 {
 //-----------------------------------------------------------------------------
 
 /**
- * \ingroup Debug
  * \brief Debug is an object for debugging in program.
  * It has 2 debugging modes :
  *  - error : for bad library use, seriously wrong DICOM
  *  - debug : for information/debug messages
  *  - warning : for warning about DICOM quality (kosher)
+ *  - assert : design by contract implementation. A function should have 
+ *             proper input and proper output. 
+ *             (should not happen, not user controlled)
  * 
  * A debugging message is only show if the flag is on (DebugFlag)
- * This is static var and can be set at begining of code:
+ * This is static var and can be set at beginning of code:
  *         gdcm::Debug::SetDebugOn();
  */
 class GDCM_EXPORT Debug
 {
 public:
-   /// This is a global flag that controls whether any debug, warning
-   /// messages are displayed.
-   static int  GetDebugFlag ();
-   static void SetDebugFlag (int flag);
-   static void SetDebugOn  () { SetDebugFlag(1); };
-   static void SetDebugOff () { SetDebugFlag(0); };
+   Debug();
+   ~Debug();
+
+   /// \brief This is a global flag that controls whether any debug, warning
+   ///        messages are displayed.
+   static void SetDebugFlag (bool flag);
+   static bool GetDebugFlag ();
+   /// \brief Sets the Debug Flag to true
+   static void DebugOn  () { SetDebugFlag(true);  };
+   /// \brief Sets the Debug Flag to false
+   static void DebugOff () { SetDebugFlag(false); };
+
+   /// \brief This is a global flag that controls if debug are redirected
+   ///        to a file or not
+   static void SetDebugToFile (bool flag);
+   static bool GetDebugToFile ();
+   /// \brief Next debug messages will be sent in the debug file
+   static void DebugToFileOn  () { SetDebugToFile(true);  };
+   /// \brief Next debug messages will be sent in the standard output
+   static void DebugToFileOff () { SetDebugToFile(false); };
+
+   static void SetDebugFilename (std::string const &filename);
+
+   static std::ofstream &GetDebugFile ();
 };
 
 } // end namespace gdcm
@@ -60,6 +85,9 @@ public:
 #ifdef GDCM_COMPILER_HAS_FUNCTION
 // Handle particular case for GNU C++ which also defines __PRETTY_FUNCTION__
 // which is a lot nice in C++
+#ifdef __BORLANDC__
+#  define __FUNCTION__ __FUNC__
+#endif
 #ifdef __GNUC__
 #  define GDCM_FUNCTION __PRETTY_FUNCTION__
 #else
@@ -73,50 +101,68 @@ public:
  * \brief   Debug
  * @param msg message part
  */
-#define gdcmDebugMacro(msg)                                \
-{                                                          \
-   if( gdcm::Debug::GetDebugFlag() )                       \
-   {                                                       \
-   std::ostringstream osmacro;                             \
-   osmacro << "Debug: In " __FILE__ ", line " << __LINE__  \
-           << ", function " << GDCM_FUNCTION << '\n'       \
-           << msg << "\n\n";                               \
-   std::cerr << osmacro.str() << std::endl;                \
-   }                                                       \
+#ifdef NDEBUG
+#define gdcmDebugMacro(msg) {}
+#else
+#define gdcmDebugMacro(msg)                                 \
+{                                                           \
+   if( Debug::GetDebugFlag() )                              \
+   {                                                        \
+   std::ostringstream osmacro;                              \
+   osmacro << "Debug: In " __FILE__ ", line " << __LINE__   \
+           << ", function " << GDCM_FUNCTION << '\n'        \
+           << "Last system error was: " << strerror(errno)  \
+           << '\n' << msg << "\n\n";                        \
+   if( Debug::GetDebugToFile() )                            \
+      Debug::GetDebugFile() << osmacro.str() << std::endl;  \
+   else                                                     \
+      std::cerr << osmacro.str() << std::endl;              \
+   }                                                        \
 }
+#endif //NDEBUG
 
 /**
- * \brief   Verbose 
+ * \brief   Warning
  * @param msg message part
  */
-#define gdcmVerboseMacro(msg)                               \
+#ifdef NDEBUG
+#define gdcmWarningMacro(msg) {}
+#else
+#define gdcmWarningMacro(msg)                               \
 {                                                           \
-   if( gdcm::Debug::GetDebugFlag() )                        \
+   if( Debug::GetDebugFlag() )                              \
    {                                                        \
    std::ostringstream osmacro;                              \
-   osmacro << "Verbose: In " __FILE__ ", line " << __LINE__ \
+   osmacro << "Warning: In " __FILE__ ", line " << __LINE__ \
            << ", function " << GDCM_FUNCTION << "\n"        \
            << msg << "\n\n";                                \
-   std::cerr << osmacro.str() << std::endl;                 \
+   if( Debug::GetDebugToFile() )                            \
+      Debug::GetDebugFile() << osmacro.str() << std::endl;  \
+   else                                                     \
+      std::cerr << osmacro.str() << std::endl;              \
    }                                                        \
 }
+#endif //NDEBUG
 
 /**
  * \brief   Error 
  * @param msg second message part 
  */
-#define gdcmErrorMacro(msg)                               \
-{                                                         \
-   if( gdcm::Debug::GetDebugFlag() )                      \
-   {                                                      \
-   std::ostringstream osmacro;                            \
-   osmacro << "Error: In " __FILE__ ", line " << __LINE__ \
-           << ", function " << GDCM_FUNCTION << '\n'      \
-           << msg << "\n\n";                              \
-   std::cerr << osmacro.str() << std::endl;               \
-   exit(1);                                               \
-   }                                                      \
+#ifdef NDEBUG
+#define gdcmErrorMacro(msg) {}
+#else
+#define gdcmErrorMacro(msg)                                 \
+{                                                           \
+   std::ostringstream osmacro;                              \
+   osmacro << "Error: In " __FILE__ ", line " << __LINE__   \
+           << ", function " << GDCM_FUNCTION << '\n'        \
+           << msg << "\n\n";                                \
+   if( Debug::GetDebugToFile() )                            \
+      Debug::GetDebugFile() << osmacro.str() << std::endl;  \
+   else                                                     \
+      std::cerr << osmacro.str() << std::endl;              \
 }
+#endif //NDEBUG
 
 /**
  * \brief   Assert 
@@ -124,17 +170,72 @@ public:
  *        An easy solution to pass also a message is to do:
  *        gdcmAssertMacro( "my message" && 2 < 3 )
  */
-#define gdcmAssertMacro(arg)                               \
-{                                                          \
-   if( arg )                                               \
-   {                                                       \
-   std::ostringstream osmacro;                             \
-   osmacro << "Assert: In " __FILE__ ", line " << __LINE__ \
-           << ", function " << GDCM_FUNCTION               \
-           << "\n\n";                                      \
-   std::cerr << osmacro.str() << std::endl;                \
-   assert ( arg );                                         \
-   }                                                       \
+#ifdef NDEBUG
+#define gdcmAssertMacro(arg) {}
+#else
+#define gdcmAssertMacro(arg)                                \
+{                                                           \
+   if( !(arg) )                                             \
+   {                                                        \
+   std::ostringstream osmacro;                              \
+   osmacro << "Assert: In " __FILE__ ", line " << __LINE__  \
+           << ", function " << GDCM_FUNCTION                \
+           << "\n\n";                                       \
+   if( Debug::GetDebugToFile() )                            \
+      Debug::GetDebugFile() << osmacro.str() << std::endl;  \
+   else                                                     \
+      std::cerr << osmacro.str() << std::endl;              \
+   assert ( arg );                                          \
+   }                                                        \
 }
+#endif //NDEBUG
+
+//-----------------------------------------------------------------------------
+//
+// Define GDCM_LEGACY macro to mark legacy methods where they are
+// declared in their class.  Example usage:
+//
+//   // @deprecated Replaced by MyOtherMethod() as of gdcm 2.0.
+//   GDCM_LEGACY(void MyMethod());
+#if defined(GDCM_LEGACY_REMOVE)
+  // Remove legacy methods completely.
+# define GDCM_LEGACY(method)
+#elif defined(GDCM_LEGACY_SILENT)
+  // Provide legacy methods with no warnings.
+# define GDCM_LEGACY(method) method
+#else
+  // Setup compile-time warnings for uses of deprecated methods if
+  // possible on this compiler.
+# if defined(__GNUC__) && !defined(__INTEL_COMPILER) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#  define GDCM_LEGACY(method) method __attribute__((deprecated))
+# elif defined(_MSC_VER) && _MSC_VER >= 1300
+#  define GDCM_LEGACY(method) __declspec(deprecated) method
+# else
+#  define GDCM_LEGACY(method) method
+# endif
+#endif
+
+// Macros to create runtime deprecation warning messages in function
+// bodies.  Example usage:
+//
+//   void MyClass::MyOldMethod()
+//   {
+//     GDCM_LEGACY_BODY(MyClass::MyOldMethod, 2.0);
+//   }
+//
+//   void MyClass::MyMethod()
+//   {
+//     GDCM_LEGACY_REPLACED_BODY(MyClass::MyMethod, 5.0,
+//                               MyClass::MyOtherMethod);
+//   }
+#if defined(GDCM_LEGACY_REMOVE) || defined(GDCM_LEGACY_SILENT)
+# define GDCM_LEGACY_BODY(method, version)
+# define GDCM_LEGACY_REPLACED_BODY(method, version, replace)
+#else
+# define GDCM_LEGACY_BODY(method, version) \
+  gdcmWarningMacro(#method " was deprecated for gdcm" #version " and will be removed in a future version.")
+# define GDCM_LEGACY_REPLACED_BODY(method, version, replace) \
+  gdcmWarningMacro(#method " was deprecated for gdcm" #version " and will be removed in a future version.  Use " #replace " instead.")
+#endif
 
 #endif