version.hpp File Reference

Precompiler define and a function to test the Exiv2 version. References: Similar versioning defines are used in KDE, GTK and other libraries. See http://apr.apache.org/versioning.html for accompanying guidelines. More...

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Namespaces

namespace  Exiv2

Defines

#define EXIV2_MAJOR_VERSION   (0)
 Exiv2 MAJOR version number of the library used at compile-time.
#define EXIV2_MINOR_VERSION   (16)
 Exiv2 MINOR version number of the library used at compile-time.
#define EXIV2_PATCH_VERSION   (0)
 Exiv2 PATCH version number of the library used at compile-time.
#define EXIV2_MAKE_VERSION(major, minor, patch)   (((major) << 16) | ((minor) << 8) | (patch))
 Make an integer version number for comparison from a major, minor and a patch version number.
#define EXIV2_VERSION   EXIV2_MAKE_VERSION(EXIV2_MAJOR_VERSION,EXIV2_MINOR_VERSION,EXIV2_PATCH_VERSION)
 The Exiv2 version number of the library used at compile-time as an integer number for easy comparison.
#define EXIV2_CHECK_VERSION(major, minor, patch)   ( Exiv2::versionNumber() >= EXIV2_MAKE_VERSION(major,minor,patch) )
 Deprecated version check macro. Do not use.
#define EXIV2_TEST_VERSION(major, minor, patch)   ( EXIV2_VERSION >= EXIV2_MAKE_VERSION(major,minor,patch) )
 Macro to test the version of the available Exiv2 library at compile-time. Return true if it is the same as or newer than the passed-in version.

Functions

int Exiv2::versionNumber ()
 Return the version of Exiv2 available at runtime as an integer.
const char * Exiv2::version ()
 Return the version of Exiv2 available at runtime as a string.
bool Exiv2::testVersion (int major, int minor, int patch)
 Test the version of the available Exiv2 library at runtime. Return true if it is the same as or newer than the passed-in version.

Detailed Description

Precompiler define and a function to test the Exiv2 version. References: Similar versioning defines are used in KDE, GTK and other libraries. See http://apr.apache.org/versioning.html for accompanying guidelines.

Version:
Rev
1366
Author:
Andreas Huggel (ahu) ahuggel@gmx.net
Date:
31-May-06, ahu: created

Define Documentation

#define EXIV2_CHECK_VERSION ( major,
minor,
patch   )     ( Exiv2::versionNumber() >= EXIV2_MAKE_VERSION(major,minor,patch) )

Deprecated version check macro. Do not use.

This macro has flaws and only remains for backward compatibility. Use EXIV2_TEST_VERSION and testVersion() instead.

#define EXIV2_TEST_VERSION ( major,
minor,
patch   )     ( EXIV2_VERSION >= EXIV2_MAKE_VERSION(major,minor,patch) )

Macro to test the version of the available Exiv2 library at compile-time. Return true if it is the same as or newer than the passed-in version.

Versions are denoted using a triplet of integers: MAJOR.MINOR.PATCH .

 Don't include the <exiv2/version.hpp> file directly, it is included by
 <exiv2/types.hpp>. Early Exiv2 versions didn't have version.hpp and the macros.

  #include <exiv2/types.hpp>
  
 Make sure an EXIV2_TEST_VERSION macro exists:
  
  #ifdef EXIV2_VERSION
  # ifndef EXIV2_TEST_VERSION
  # define EXIV2_TEST_VERSION(major,minor,patch) \
      ( EXIV2_VERSION >= EXIV2_MAKE_VERSION(major,minor,patch) )
  # endif
  #else
  # define EXIV2_TEST_VERSION(major,minor,patch) (false)
  #endif
  
  std::cout << "Compiled with Exiv2 version " << EXV_PACKAGE_VERSION << "\n"
            << "Runtime Exiv2 version is    " << Exiv2::version()    << "\n";
  
 Test the Exiv2 version available at runtime but compile the if-clause only if
 the compile-time version is at least 0.15. Earlier versions didn't have a
 testVersion() function:
  
  #if EXIV2_TEST_VERSION(0,15,0)
  if (Exiv2::testVersion(0,13,0)) {
      std::cout << "Available Exiv2 version is equal to or greater than 0.13\n";
  }
  else {
      std::cout << "Installed Exiv2 version is less than 0.13\n";
  }
  #else
  std::cout << "Compile-time Exiv2 version doesn't have Exiv2::testVersion()\n";
  #endif


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