From 73ffe236853b05b8f2d0adc84c522259fc30590e Mon Sep 17 00:00:00 2001
From: bangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Mon, 7 Oct 2013 13:28:39 +0000
Subject: [PATCH] Search first for the file with its complete given name. I.e.,
 if someone searches for <mesh.vtk> with additional suffix <.vtk>, then still
 find the file if it exists before trying <mesh.vtk.vtk>.

git-svn-id: https://svn.dealii.org/trunk@31162 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/source/base/path_search.cc | 50 +++++++++++++++++++++---------
 1 file changed, 36 insertions(+), 14 deletions(-)

diff --git a/deal.II/source/base/path_search.cc b/deal.II/source/base/path_search.cc
index 6d3e0a5eef..4f0faa9b8c 100644
--- a/deal.II/source/base/path_search.cc
+++ b/deal.II/source/base/path_search.cc
@@ -124,22 +124,44 @@ PathSearch::find (const std::string &filename,
             << my_path_list.size() << " directories "
             << std::endl;
 
-  // Try to open file
+  // Try to open file in the various directories we have
   for (path = my_path_list.begin(); path != endp; ++path)
     {
-      real_name = *path + filename + suffix;
-      if (debug > 1)
-        deallog << "PathSearch[" << cls << "] trying "
-                << real_name << std::endl;
-      FILE *fp = fopen(real_name.c_str(), open_mode);
-      if (fp != 0)
-        {
-          if (debug > 0)
-            deallog << "PathSearch[" << cls << "] opened "
-                    << real_name << std::endl;
-          fclose(fp);
-          return real_name;
-        }
+      // see if the file exists as given, i.e., with
+      // the whole filename specified, including (possibly)
+      // the suffix
+      {
+	real_name = *path + filename;
+	if (debug > 1)
+	  deallog << "PathSearch[" << cls << "] trying "
+		  << real_name << std::endl;
+	FILE *fp = fopen(real_name.c_str(), open_mode);
+	if (fp != 0)
+	  {
+	    if (debug > 0)
+	      deallog << "PathSearch[" << cls << "] opened "
+		      << real_name << std::endl;
+	    fclose(fp);
+	    return real_name;
+	  }
+      }
+
+      // try again with the suffix appended
+      {
+	real_name = *path + filename + suffix;
+	if (debug > 1)
+	  deallog << "PathSearch[" << cls << "] trying "
+		  << real_name << std::endl;
+	FILE *fp = fopen(real_name.c_str(), open_mode);
+	if (fp != 0)
+	  {
+	    if (debug > 0)
+	      deallog << "PathSearch[" << cls << "] opened "
+		      << real_name << std::endl;
+	    fclose(fp);
+	    return real_name;
+	  }
+      }
     }
   AssertThrow(false, ExcFileNotFound(filename, cls));
   return std::string("");
-- 
2.39.5