1 files changed, 63 insertions, 3 deletions
diff --git a/Master/texmf-dist/source/latex/hyperref/backref.dtx b/Master/texmf-dist/source/latex/hyperref/backref.dtx
index bb6cbdcd3d6..8a24e6d27dd 100644
--- a/Master/texmf-dist/source/latex/hyperref/backref.dtx
+++ b/Master/texmf-dist/source/latex/hyperref/backref.dtx
@@ -1,5 +1,5 @@
 % \iffalse
-%% File: backref.dtx Copyright (C) 1995-2005 David Carlisle, Sebastian Rahtz, Heiko Oberdiek
+%% File: backref.dtx Copyright (C) 1995-2009 David Carlisle, Sebastian Rahtz, Heiko Oberdiek
 %
 %% This file is part of the `Hyperref Bundle'.
 %% -------------------------------------------
@@ -22,9 +22,9 @@
 %<driver>\ProvidesFile{backref.drv}
 % \fi
 % \ProvidesFile{backref.dtx}
-  [2006/09/05 v1.28 Bibliographical back referencing]%
+  [2009/11/14 v1.29 Bibliographical back referencing]%
 %
-% \CheckSum{574}
+% \CheckSum{620}
 %
 % \iffalse
 %<*driver>
@@ -690,6 +690,66 @@
 }
 %    \end{macrocode}
 %    \end{macro}
+%
+% \subsection{Rerun warning}
+%
+%    The following code computes a MD5 sum and the file size of the
+%    |.brf| file at the begin and the end of the document and compares
+%    them. A rerun warning is given, if they do not match.
+%    This method requires pdf\TeX\ or Lua\TeX. The method fails,
+%    if the MD5 sum and the file size are the same for
+%    a changed |.brf| file (it's probably very seldom).
+%    \begin{macrocode}
+\RequirePackage{pdftexcmds}[2009/04/10]
+\begingroup
+  \xdef\BR@CheckSumBefore{%
+    \@ifundefined{pdf@filemdfivesum}{}{%
+      \pdf@filemdfivesum{\jobname.brf}%
+    }%
+    :%
+    \@ifundefined{pdf@filesize}{}{%
+      \pdf@filesize{\jobname.brf}%
+    }%
+  }%
+\endgroup
+\AtBeginDocument{%
+  \AtEndDocument{%
+    \clearpage
+    \if@filesw
+      \immediate\write\@mainaux{%
+        \string\csname\space BR@CheckEnd\string\endcsname
+      }%
+    \fi
+  }%
+%    \end{macrocode}
+%    \begin{macro}{\BR@CheckEnd}
+%    \begin{macrocode}
+  \def\BR@CheckEnd{%
+    \begingroup
+      \@ifundefined{tf@brf@open}{}{%
+        \immediate\closeout\tf@brf
+      }%
+      \edef\BR@CheckSumAfter{%
+        \@ifundefined{pdf@filemdfivesum}{}{%
+          \pdf@filemdfivesum{\jobname.brf}%
+        }%
+        :%
+        \@ifundefined{pdf@filesize}{}{%
+          \pdf@filesize{\jobname.brf}%
+        }%
+      }%
+      \ifx\BR@CheckSumBefore\BR@CheckSumAfter
+      \else
+        \PackageWarningNoLine{backref}{%
+          Rerun to get bibliographical references right%
+        }%
+      \fi
+    \endgroup
+  }%
+}
+%    \end{macrocode}
+%    \end{macro}
+%
 %    \begin{macrocode}
 %</package>
 %    \end{macrocode}