SBFile::GetFile: convert SBFile back into python native files.

Summary:
This makes SBFile::GetFile public and adds a SWIG typemap to convert
the result back into a python native file.

If the underlying File itself came from a python file, it is returned
identically.   Otherwise a new python file object is created using
the file descriptor.

Reviewers: JDevlieghere, jasonmolenda, labath

Reviewed By: labath

Subscribers: lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D68737

llvm-svn: 374911

1 files changed, 16 insertions, 3 deletions

diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h b/lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h
index a26b64a..b794810 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h
@@ -638,7 +638,7 @@ public:
   void Reset(PyRefType type, PyObject *py_obj) override;
 
   ArgInfo GetNumArguments() const;
-  
+
   // If the callable is a Py_Class, then find the number of arguments
   // of the __init__ method.
   ArgInfo GetNumInitArguments() const;
@@ -658,7 +658,6 @@ public:
 class PythonFile : public PythonObject {
 public:
   PythonFile();
-  PythonFile(File &file, const char *mode);
   PythonFile(PyRefType type, PyObject *o);
 
   ~PythonFile() override;
@@ -668,7 +667,21 @@ public:
   using PythonObject::Reset;
 
   void Reset(PyRefType type, PyObject *py_obj) override;
-  void Reset(File &file, const char *mode);
+
+  static llvm::Expected<PythonFile> FromFile(File &file,
+                                             const char *mode = nullptr);
+
+  // FIXME delete this after FILE* typemaps are deleted
+  // and ScriptInterpreterPython is fixed
+  PythonFile(File &file, const char *mode = nullptr) {
+    auto f = FromFile(file, mode);
+    if (f)
+      *this = std::move(f.get());
+    else {
+      Reset();
+      llvm::consumeError(f.takeError());
+    }
+  }
 
   lldb::FileUP GetUnderlyingFile() const;