[1/3] Move py_ui_out to a new header

diff --git a/gdb/python/py-mi.c b/gdb/python/py-mi.c
index a7b4f4fa3cf..2b265ad80d6 100644
--- a/gdb/python/py-mi.c
+++ b/gdb/python/py-mi.c
@@ -19,142 +19,15 @@ 
 
 #include "defs.h"
 #include "python-internal.h"
+#include "py-uiout.h"
 #include "utils.h"
 #include "ui.h"
-#include "ui-out.h"
 #include "interps.h"
 #include "target.h"
 #include "mi/mi-parse.h"
 #include "mi/mi-console.h"
 #include "mi/mi-interp.h"
 
-/* A ui_out subclass that creates a Python object based on the data
-   that is passed in.  */
-
-class py_ui_out : public ui_out
-{
-public:
-
-  py_ui_out ()
-    : ui_out (fix_multi_location_breakpoint_output
-	      | fix_breakpoint_script_output)
-  {
-    do_begin (ui_out_type_tuple, nullptr);
-  }
-
-  bool can_emit_style_escape () const override
-  { return false; }
-
-  bool do_is_mi_like_p () const override
-  { return true; }
-
-  /* Return the Python object that was created.  If a Python error
-     occurred during the processing, set the Python error and return
-     nullptr.  */
-  PyObject *result ()
-  {
-    if (m_error.has_value ())
-      {
-	m_error->restore ();
-	return nullptr;
-      }
-    return current ().obj.release ();
-  }
-
-protected:
-
-  void do_progress_end () override { }
-  void do_progress_start () override { }
-  void do_progress_notify (const std::string &, const char *, double, double)
-    override
-  { }
-
-  void do_table_begin (int nbrofcols, int nr_rows, const char *tblid) override
-  {
-    do_begin (ui_out_type_list, tblid);
-  }
-  void do_table_body () override
-  { }
-  void do_table_end () override
-  {
-    do_end (ui_out_type_list);
-  }
-  void do_table_header (int width, ui_align align,
-			const std::string &col_name,
-			const std::string &col_hdr) override
-  { }
-
-  void do_begin (ui_out_type type, const char *id) override;
-  void do_end (ui_out_type type) override;
-
-  void do_field_signed (int fldno, int width, ui_align align,
-			const char *fldname, LONGEST value) override;
-  void do_field_unsigned (int fldno, int width, ui_align align,
-			  const char *fldname, ULONGEST value) override;
-
-  void do_field_skip (int fldno, int width, ui_align align,
-		      const char *fldname) override
-  { }
-
-  void do_field_string (int fldno, int width, ui_align align,
-			const char *fldname, const char *string,
-			const ui_file_style &style) override;
-  void do_field_fmt (int fldno, int width, ui_align align,
-		     const char *fldname, const ui_file_style &style,
-		     const char *format, va_list args) override
-    ATTRIBUTE_PRINTF (7, 0);
-
-  void do_spaces (int numspaces) override
-  { }
-
-  void do_text (const char *string) override
-  { }
-
-  void do_message (const ui_file_style &style,
-		   const char *format, va_list args)
-    override ATTRIBUTE_PRINTF (3,0)
-  { }
-
-  void do_wrap_hint (int indent) override
-  { }
-
-  void do_flush () override
-  { }
-
-  void do_redirect (struct ui_file *outstream) override
-  { }
-
-private:
-
-  /* When constructing Python objects, this class keeps a stack of
-     objects being constructed.  Each such object has this type.  */
-  struct object_desc
-  {
-    /* Name of the field (or empty for lists) that this object will
-       eventually become.  */
-    std::string field_name;
-    /* The object under construction.  */
-    gdbpy_ref<> obj;
-    /* The type of structure being created.  Note that tables are
-       treated as lists here.  */
-    ui_out_type type;
-  };
-
-  /* The stack of objects being created.  */
-  std::vector<object_desc> m_objects;
-
-  /* If an error occurred, this holds the exception information for
-     use by the 'release' method.  */
-  gdb::optional<gdbpy_err_fetch> m_error;
-
-  /* Return a reference to the object under construction.  */
-  object_desc &current ()
-  { return m_objects.back (); }
-
-  /* Add a new field to the current object under construction.  */
-  void add_field (const char *name, const gdbpy_ref<> &obj);
-};
-
 void
 py_ui_out::add_field (const char *name, const gdbpy_ref<> &obj)
 {
diff --git a/gdb/python/py-uiout.h b/gdb/python/py-uiout.h
new file mode 100644
index 00000000000..e9abf8ee5be
--- /dev/null
+++ b/gdb/python/py-uiout.h
@@ -0,0 +1,153 @@ 
+/* Python implementation of ui_out
+
+   Copyright (C) 2023 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef GDB_PYTHON_PY_UIOUT_H
+#define GDB_PYTHON_PY_UIOUT_H
+
+#include "python-internal.h"
+#include "ui-out.h"
+
+/* A ui_out subclass that creates a Python object based on the data
+   that is passed in.  */
+
+class py_ui_out : public ui_out
+{
+public:
+
+  py_ui_out ()
+    : ui_out (fix_multi_location_breakpoint_output
+	      | fix_breakpoint_script_output)
+  {
+    do_begin (ui_out_type_tuple, nullptr);
+  }
+
+  bool can_emit_style_escape () const override
+  { return false; }
+
+  bool do_is_mi_like_p () const override
+  { return true; }
+
+  /* Return the Python object that was created.  If a Python error
+     occurred during the processing, set the Python error and return
+     nullptr.  */
+  PyObject *result ()
+  {
+    if (m_error.has_value ())
+      {
+	m_error->restore ();
+	return nullptr;
+      }
+    return current ().obj.release ();
+  }
+
+protected:
+
+  void do_progress_end () override { }
+  void do_progress_start () override { }
+  void do_progress_notify (const std::string &, const char *, double, double)
+    override
+  { }
+
+  void do_table_begin (int nbrofcols, int nr_rows, const char *tblid) override
+  {
+    do_begin (ui_out_type_list, tblid);
+  }
+  void do_table_body () override
+  { }
+  void do_table_end () override
+  {
+    do_end (ui_out_type_list);
+  }
+  void do_table_header (int width, ui_align align,
+			const std::string &col_name,
+			const std::string &col_hdr) override
+  { }
+
+  void do_begin (ui_out_type type, const char *id) override;
+  void do_end (ui_out_type type) override;
+
+  void do_field_signed (int fldno, int width, ui_align align,
+			const char *fldname, LONGEST value) override;
+  void do_field_unsigned (int fldno, int width, ui_align align,
+			  const char *fldname, ULONGEST value) override;
+
+  void do_field_skip (int fldno, int width, ui_align align,
+		      const char *fldname) override
+  { }
+
+  void do_field_string (int fldno, int width, ui_align align,
+			const char *fldname, const char *string,
+			const ui_file_style &style) override;
+  void do_field_fmt (int fldno, int width, ui_align align,
+		     const char *fldname, const ui_file_style &style,
+		     const char *format, va_list args) override
+    ATTRIBUTE_PRINTF (7, 0);
+
+  void do_spaces (int numspaces) override
+  { }
+
+  void do_text (const char *string) override
+  { }
+
+  void do_message (const ui_file_style &style,
+		   const char *format, va_list args)
+    override ATTRIBUTE_PRINTF (3,0)
+  { }
+
+  void do_wrap_hint (int indent) override
+  { }
+
+  void do_flush () override
+  { }
+
+  void do_redirect (struct ui_file *outstream) override
+  { }
+
+private:
+
+  /* When constructing Python objects, this class keeps a stack of
+     objects being constructed.  Each such object has this type.  */
+  struct object_desc
+  {
+    /* Name of the field (or empty for lists) that this object will
+       eventually become.  */
+    std::string field_name;
+    /* The object under construction.  */
+    gdbpy_ref<> obj;
+    /* The type of structure being created.  Note that tables are
+       treated as lists here.  */
+    ui_out_type type;
+  };
+
+  /* The stack of objects being created.  */
+  std::vector<object_desc> m_objects;
+
+  /* If an error occurred, this holds the exception information for
+     use by the 'release' method.  */
+  gdb::optional<gdbpy_err_fetch> m_error;
+
+  /* Return a reference to the object under construction.  */
+  object_desc &current ()
+  { return m_objects.back (); }
+
+  /* Add a new field to the current object under construction.  */
+  void add_field (const char *name, const gdbpy_ref<> &obj);
+};
+
+#endif /* GDB_PYTHON_PY_UIOUT_H */