From 61f28aea36ae33e72d78e517030b8907061ca585 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Wed, 23 Mar 2022 14:44:50 -0400
Subject: [PATCH] add "rewind()" member function to Text and Potential file
 reader classes

---
 src/potential_file_reader.cpp | 7 +++++++
 src/potential_file_reader.h   | 1 +
 src/text_file_reader.cpp      | 7 +++++++
 src/text_file_reader.h        | 1 +
 4 files changed, 16 insertions(+)

diff --git a/src/potential_file_reader.cpp b/src/potential_file_reader.cpp
index bb723d0e82..f134892501 100644
--- a/src/potential_file_reader.cpp
+++ b/src/potential_file_reader.cpp
@@ -92,6 +92,13 @@ void PotentialFileReader::ignore_comments(bool value)
   reader->ignore_comments = value;
 }
 
+/** Reset file to the beginning */
+
+void PotentialFileReader::rewind()
+{
+  reader->rewind();
+}
+
 /** Read a line but ignore its content */
 
 void PotentialFileReader::skip_line()
diff --git a/src/potential_file_reader.h b/src/potential_file_reader.h
index e7484a96ac..466419b676 100644
--- a/src/potential_file_reader.h
+++ b/src/potential_file_reader.h
@@ -43,6 +43,7 @@ class PotentialFileReader : protected Pointers {
 
   void ignore_comments(bool value);
 
+  void rewind();
   void skip_line();
   char *next_line(int nparams = 0);
   void next_dvector(double *list, int n);
diff --git a/src/text_file_reader.cpp b/src/text_file_reader.cpp
index ab1c81efb1..317b44e36e 100644
--- a/src/text_file_reader.cpp
+++ b/src/text_file_reader.cpp
@@ -82,6 +82,13 @@ TextFileReader::~TextFileReader()
   if (closefp) fclose(fp);
 }
 
+/** Reset file to the beginning */
+
+void TextFileReader::rewind()
+{
+  ::rewind(fp);
+}
+
 /** Read the next line and ignore it */
 
 void TextFileReader::skip_line()
diff --git a/src/text_file_reader.h b/src/text_file_reader.h
index e5a743580f..30ec9351be 100644
--- a/src/text_file_reader.h
+++ b/src/text_file_reader.h
@@ -38,6 +38,7 @@ class TextFileReader {
 
   ~TextFileReader();
 
+  void rewind();
   void skip_line();
   char *next_line(int nparams = 0);