commit b342dcb419dd743aa357c917118a34f2670f0998
Author: Daniel Swanson <popcorn.tomato.dude@gmail.com>
Date:   Mon Jun 14 17:41:37 2021 -0500

    another helper

diff --git a/lttoolbox/input_file.cc b/lttoolbox/input_file.cc
index 64ab460..d12f6b8 100644
--- a/lttoolbox/input_file.cc
+++ b/lttoolbox/input_file.cc
@@ -63,6 +63,13 @@ InputFile::close()
   }
 }
 
+void
+InputFile::wrap(FILE* newinfile)
+{
+  close();
+  infile = newinfile;
+}
+
 void
 InputFile::internal_read()
 {
diff --git a/lttoolbox/input_file.h b/lttoolbox/input_file.h
index 5f8dce0..6426f7c 100644
--- a/lttoolbox/input_file.h
+++ b/lttoolbox/input_file.h
@@ -36,6 +36,7 @@ public:
   bool open(const char* fname = nullptr);
   void open_or_exit(const char* fname = nullptr);
   void close();
+  void wrap(FILE* newinfile);
   UChar32 get();
   UChar32 peek();
   void unget(UChar32 c);