ENH: writeFile - enable file creation at a specified time. Fixes #1096

src/OpenFOAM/db/functionObjects/writeFile/writeFile.C

@@ -84,18 +84,18 @@ Foam::fileName Foam::functionObjects::writeFile::baseTimeDir() const
 
 Foam::autoPtr<Foam::OFstream> Foam::functionObjects::writeFile::createFile
 (
-    const word& name
+    const word& name,
+    const scalar time
 ) const
 {
     autoPtr<OFstream> osPtr;
 
     if (Pstream::master() && writeToFile_)
     {
-        const scalar startTime = fileObr_.time().startTime().value();
+        const scalar userTime = fileObr_.time().timeToUserTime(time);
-        const scalar userStartTime = fileObr_.time().timeToUserTime(startTime);
+        const word timeName = Time::timeName(userTime);
-        const word startTimeName = Time::timeName(userStartTime);
 
-        fileName outputDir(baseFileDir()/prefix_/startTimeName);
+        fileName outputDir(baseFileDir()/prefix_/timeName);
 
         mkDir(outputDir);
 
@@ -105,7 +105,7 @@ Foam::autoPtr<Foam::OFstream> Foam::functionObjects::writeFile::createFile
         IFstream is(outputDir/(fName + ".dat"));
         if (is.good())
         {
-            fName = fName + "_" + startTimeName;
+            fName = fName + "_" + timeName;
         }
 
         osPtr.reset(new OFstream(outputDir/(fName + ".dat")));
@@ -123,6 +123,16 @@ Foam::autoPtr<Foam::OFstream> Foam::functionObjects::writeFile::createFile
 }
 
 
+Foam::autoPtr<Foam::OFstream> Foam::functionObjects::writeFile::createFile
+(
+    const word& name
+) const
+{
+    return createFile(name, startTime_);
+
+}
+
+
 void Foam::functionObjects::writeFile::resetFile(const word& fileName)
 {
     fileName_ = fileName;
@@ -153,7 +163,8 @@ Foam::functionObjects::writeFile::writeFile
     filePtr_(),
     writePrecision_(IOstream::defaultPrecision()),
     writeToFile_(true),
-    writtenHeader_(false)
+    writtenHeader_(false),
+    startTime_(obr.time().startTime().value())
 {}
 
 
@@ -171,7 +182,8 @@ Foam::functionObjects::writeFile::writeFile
     filePtr_(),
     writePrecision_(IOstream::defaultPrecision()),
     writeToFile_(true),
-    writtenHeader_(false)
+    writtenHeader_(false),
+    startTime_(obr.time().startTime().value())
 {
     read(dict);
 
@@ -182,12 +194,6 @@ Foam::functionObjects::writeFile::writeFile
 }
 
 
-// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
-
-Foam::functionObjects::writeFile::~writeFile()
-{}
-
-
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 bool Foam::functionObjects::writeFile::read(const dictionary& dict)

src/OpenFOAM/db/functionObjects/writeFile/writeFile.H

@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2012-2016 OpenFOAM Foundation
-     \\/     M anipulation  | Copyright (C) 2015-2016 OpenCFD Ltd.
+     \\/     M anipulation  | Copyright (C) 2015-2018 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -82,6 +82,9 @@ protected:
         //- Flag to identify whether the header has been written
         bool writtenHeader_;
 
+        //- Start time value
+        scalar startTime_;
+
 
     // Protected Member Functions
 
@@ -94,8 +97,18 @@ protected:
         //- Return the base directory for the current time value
         fileName baseTimeDir() const;
 
+        //- Return an autoPtr to a new file for a given time
+        virtual autoPtr<OFstream> createFile
+        (
+            const word& name,
+            const scalar time
+        ) const;
+
         //- Return an autoPtr to a new file
-        virtual autoPtr<OFstream> createFile(const word& name) const;
+        virtual autoPtr<OFstream> createFile
+        (
+            const word& name
+        ) const;
 
         //- Reset internal file pointer to new file with new name
         virtual void resetFile(const word& name);
@@ -142,7 +155,7 @@ public:
 
 
     //- Destructor
-    virtual ~writeFile();
+    virtual ~writeFile() = default;
 
 
     // Member Functions