Reorganize upb file structure
This change moves almost everything in the `upb/` directory up one level, so
that for example `upb/upb/generated_code_support.h` becomes just
`upb/generated_code_support.h`. The only exceptions I made to this were that I
left `upb/cmake` and `upb/BUILD` where they are, mostly because that avoids
conflict with other files and the current locations seem reasonable for now.
The `python/` directory is a little bit of a challenge because we had to merge
the existing directory there with `upb/python/`. I made `upb/python/BUILD` into
the BUILD file for the merged directory, and it effectively loads the contents
of the other BUILD file via `python/build_targets.bzl`, but I plan to clean
this up soon.
PiperOrigin-RevId: 568651768
diff --git a/python/map.h b/python/map.h
new file mode 100644
index 0000000..6c2c47d
--- /dev/null
+++ b/python/map.h
@@ -0,0 +1,69 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef PYUPB_MAP_H__
+#define PYUPB_MAP_H__
+
+#include <stdbool.h>
+
+#include "python/python_api.h"
+#include "upb/reflection/def.h"
+
+// Creates a new repeated field stub for field `f` of message object `parent`.
+// Precondition: `parent` must be a stub.
+PyObject* PyUpb_MapContainer_NewStub(PyObject* parent, const upb_FieldDef* f,
+ PyObject* arena);
+
+// Returns a map object wrapping `map`, of field type `f`, which must be on
+// `arena`. If an existing wrapper object exists, it will be returned,
+// otherwise a new object will be created. The caller always owns a ref on the
+// returned value.
+PyObject* PyUpb_MapContainer_GetOrCreateWrapper(upb_Map* map,
+ const upb_FieldDef* f,
+ PyObject* arena);
+
+// Reifies a map stub to point to the concrete data in `map`.
+// If `map` is NULL, an appropriate empty map will be constructed.
+void PyUpb_MapContainer_Reify(PyObject* self, upb_Map* map);
+
+// Reifies this map object if it is not already reified.
+upb_Map* PyUpb_MapContainer_EnsureReified(PyObject* self);
+
+// Assigns `self[key] = val` for the map `self`.
+int PyUpb_MapContainer_AssignSubscript(PyObject* self, PyObject* key,
+ PyObject* val);
+
+// Invalidates any existing iterators for the map `obj`.
+void PyUpb_MapContainer_Invalidate(PyObject* obj);
+
+// Module-level init.
+bool PyUpb_Map_Init(PyObject* m);
+
+#endif // PYUPB_MAP_H__
