From af39491c04a7d80ca42376cd97ecae6663dadd1b Mon Sep 17 00:00:00 2001
From: Henry Weller <http://cfd.direct>
Date: Thu, 26 May 2016 21:43:16 +0100
Subject: [PATCH] fileName: Added recursive directory search function

    //- Recursively search the given directory for the file
    //  returning the path relative to the directory or
    //  fileName::null if not found
    fileName search(const word& file, const fileName& directory);
---
 .../primitives/strings/fileName/fileName.C    | 29 +++++++++++++++++++
 .../primitives/strings/fileName/fileName.H    |  6 ++++
 2 files changed, 35 insertions(+)

diff --git a/src/OpenFOAM/primitives/strings/fileName/fileName.C b/src/OpenFOAM/primitives/strings/fileName/fileName.C
index becb5db393..dfbe2d0de7 100644
--- a/src/OpenFOAM/primitives/strings/fileName/fileName.C
+++ b/src/OpenFOAM/primitives/strings/fileName/fileName.C
@@ -396,4 +396,33 @@ Foam::fileName Foam::operator/(const string& a, const string& b)
 }
 
 
+// * * * * * * * * * * * * * * * Global Functions  * * * * * * * * * * * * * //
+
+Foam::fileName Foam::search(const word& file, const fileName& directory)
+{
+    // Search the current directory for the file
+    fileNameList files(readDir(directory));
+    forAll(files, i)
+    {
+        if (files[i] == file)
+        {
+            return directory/file;
+        }
+    }
+
+    // If not found search each of the sub-directories
+    fileNameList dirs(readDir(directory, fileName::DIRECTORY));
+    forAll(dirs, i)
+    {
+        fileName path = search(file, directory/dirs[i]);
+        if (path != fileName::null)
+        {
+            return path;
+        }
+    }
+
+    return fileName::null;
+}
+
+
 // ************************************************************************* //
diff --git a/src/OpenFOAM/primitives/strings/fileName/fileName.H b/src/OpenFOAM/primitives/strings/fileName/fileName.H
index ee0d751fae..7b0c160bda 100644
--- a/src/OpenFOAM/primitives/strings/fileName/fileName.H
+++ b/src/OpenFOAM/primitives/strings/fileName/fileName.H
@@ -242,6 +242,12 @@ public:
 fileName operator/(const string&, const string&);
 
 
+//- Recursively search the given directory for the file
+//  returning the path relative to the directory or
+//  fileName::null if not found
+fileName search(const word& file, const fileName& directory);
+
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 } // End namespace Foam