X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fui-out.c;h=80845f4bcaa8d61ee3e7c202b645831a8b22e8da;hb=d043f8c867f85f1c36cc957da8204fe2907b3aea;hp=6e14d09921817ad4bd5a72aa69f30a297f4e5404;hpb=bee0189a82dcb04038b1c20d336e5825564f775c;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/ui-out.c b/gdb/ui-out.c
index 6e14d09921..80845f4bca 100644
--- a/gdb/ui-out.c
+++ b/gdb/ui-out.c
@@ -1,7 +1,6 @@
 /* Output generating routines for GDB.
 
-   Copyright 1999, 2000, 2001, 2002, 2004, 2005
-   Free Software Foundation, Inc.
+   Copyright (C) 1999-2019 Free Software Foundation, Inc.
 
    Contributed by Cygnus Solutions.
    Written by Fernando Nasser for Cygnus.
@@ -10,7 +9,7 @@
 
    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 2 of the License, or
+   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,
@@ -19,1096 +18,840 @@
    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, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
-#include "gdb_string.h"
 #include "expression.h"		/* For language.h */
 #include "language.h"
 #include "ui-out.h"
-#include "gdb_assert.h"
+#include "gdbsupport/format.h"
+#include "cli/cli-style.h"
+#include "diagnostics.h"
 
-/* table header structures */
+#include <vector>
+#include <memory>
+#include <string>
 
-struct ui_out_hdr
-  {
-    int colno;
-    int width;
-    int alignment;
-    char *col_name;
-    char *colhdr;
-    struct ui_out_hdr *next;
-  };
+namespace {
 
-/* Maintain a stack so that the info applicable to the inner most list
-   is always available.  Stack/nested level 0 is reserved for the
-   top-level result. */
+/* A header of a ui_out_table.  */
 
-enum { MAX_UI_OUT_LEVELS = 6 };
+class ui_out_hdr
+{
+ public:
 
-struct ui_out_level
+  explicit ui_out_hdr (int number, int min_width, ui_align alignment,
+		       const std::string &name, const std::string &header)
+  : m_number (number),
+    m_min_width (min_width),
+    m_alignment (alignment),
+    m_name (name),
+    m_header (header)
   {
-    /* Count each field; the first element is for non-list fields */
-    int field_count;
-    /* The type of this level. */
-    enum ui_out_type type;
-  };
+  }
 
-/* Tables are special.  Maintain a separate structure that tracks
-   their state.  At present an output can only contain a single table
-   but that restriction might eventually be lifted.  */
+  int number () const
+  {
+    return m_number;
+  }
 
-struct ui_out_table
-{
-  /* If on, a table is being generated.  */
-  int flag;
+  int min_width () const
+  {
+    return m_min_width;
+  }
 
-  /* If on, the body of a table is being generated.  If off, the table
-     header is being generated.  */
-  int body_flag;
+  ui_align alignment () const
+  {
+    return m_alignment;
+  }
 
-  /* The level at which each entry of the table is to be found.  A row
-     (a tuple) is made up of entries.  Consequently ENTRY_LEVEL is one
-     above that of the table.  */
-  int entry_level;
+  const std::string &header () const
+  {
+    return m_header;
+  }
 
-  /* Number of table columns (as specified in the table_begin call).  */
-  int columns;
+  const std::string &name () const
+  {
+    return m_name;
+  }
 
-  /* String identifying the table (as specified in the table_begin
-     call).  */
-  char *id;
+ private:
+
+  /* The number of the table column this header represents, 1-based.  */
+  int m_number;
 
-  /* Points to the first table header (if any).  */
-  struct ui_out_hdr *header_first;
+  /* Minimal column width in characters.  May or may not be applicable,
+     depending on the actual implementation of ui_out.  */
+  int m_min_width;
 
-  /* Points to the last table header (if any).  */
-  struct ui_out_hdr *header_last;
+  /* Alignment of the content in the column.  May or may not be applicable,
+     depending on the actual implementation of ui_out.  */
+  ui_align m_alignment;
 
-  /* Points to header of NEXT column to format.  */
-  struct ui_out_hdr *header_next;
+  /* Internal column name, used to internally refer to the column.  */
+  std::string m_name;
 
+  /* Printed header text of the column.  */
+  std::string m_header;
 };
 
+} // namespace
 
-/* The ui_out structure */
-/* Any change here requires a corresponding one in the initialization
-   of the default uiout, which is statically initialized */
+/* A level of nesting (either a list or a tuple) in a ui_out output.  */
 
-struct ui_out
+class ui_out_level
+{
+ public:
+
+  explicit ui_out_level (ui_out_type type)
+  : m_type (type),
+    m_field_count (0)
   {
-    int flags;
-    /* specific implementation of ui-out */
-    struct ui_out_impl *impl;
-    struct ui_out_data *data;
+  }
 
-    /* Sub structure tracking the ui-out depth.  */
-    int level;
-    struct ui_out_level levels[MAX_UI_OUT_LEVELS];
+  ui_out_type type () const
+  {
+    return m_type;
+  }
 
-    /* A table, if any.  At present only a single table is supported.  */
-    struct ui_out_table table;
-  };
+  int field_count () const
+  {
+    return m_field_count;
+  }
 
-/* The current (inner most) level. */
-static struct ui_out_level *
-current_level (struct ui_out *uiout)
-{
-  return &uiout->levels[uiout->level];
-}
+  void inc_field_count ()
+  {
+    m_field_count++;
+  }
 
-/* Create a new level, of TYPE.  Return the new level's index. */
-static int
-push_level (struct ui_out *uiout,
-	    enum ui_out_type type,
-	    const char *id)
-{
-  struct ui_out_level *current;
-  /* We had better not overflow the buffer. */
-  uiout->level++;
-  gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS);
-  current = current_level (uiout);
-  current->field_count = 0;
-  current->type = type;
-  return uiout->level;
-}
+ private:
 
-/* Discard the current level, return the discarded level's index.
-   TYPE is the type of the level being discarded. */
-static int
-pop_level (struct ui_out *uiout,
-	   enum ui_out_type type)
-{
-  /* We had better not underflow the buffer. */
-  gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS);
-  gdb_assert (current_level (uiout)->type == type);
-  uiout->level--;
-  return uiout->level + 1;
-}
+  /* The type of this level.  */
+  ui_out_type m_type;
 
-
-/* These are the default implementation functions */
-
-static void default_table_begin (struct ui_out *uiout, int nbrofcols,
-				 int nr_rows, const char *tblid);
-static void default_table_body (struct ui_out *uiout);
-static void default_table_end (struct ui_out *uiout);
-static void default_table_header (struct ui_out *uiout, int width,
-				  enum ui_align alig, const char *col_name,
-				  const char *colhdr);
-static void default_begin (struct ui_out *uiout,
-			   enum ui_out_type type,
-			   int level, const char *id);
-static void default_end (struct ui_out *uiout,
-			 enum ui_out_type type,
-			 int level);
-static void default_field_int (struct ui_out *uiout, int fldno, int width,
-			       enum ui_align alig,
-			       const char *fldname,
-			       int value);
-static void default_field_skip (struct ui_out *uiout, int fldno, int width,
-				enum ui_align alig,
-				const char *fldname);
-static void default_field_string (struct ui_out *uiout, int fldno, int width,
-				  enum ui_align align,
-				  const char *fldname,
-				  const char *string);
-static void default_field_fmt (struct ui_out *uiout, int fldno,
-			       int width, enum ui_align align,
-			       const char *fldname,
-			       const char *format,
-			       va_list args) ATTR_FORMAT (printf, 6, 0);
-static void default_spaces (struct ui_out *uiout, int numspaces);
-static void default_text (struct ui_out *uiout, const char *string);
-static void default_message (struct ui_out *uiout, int verbosity,
-			     const char *format,
-			     va_list args) ATTR_FORMAT (printf, 3, 0);
-static void default_wrap_hint (struct ui_out *uiout, char *identstring);
-static void default_flush (struct ui_out *uiout);
-
-/* This is the default ui-out implementation functions vector */
-
-struct ui_out_impl default_ui_out_impl =
-{
-  default_table_begin,
-  default_table_body,
-  default_table_end,
-  default_table_header,
-  default_begin,
-  default_end,
-  default_field_int,
-  default_field_skip,
-  default_field_string,
-  default_field_fmt,
-  default_spaces,
-  default_text,
-  default_message,
-  default_wrap_hint,
-  default_flush,
-  NULL,
-  0, /* Does not need MI hacks.  */
+  /* Count each field; the first element is for non-list fields.  */
+  int m_field_count;
 };
 
-/* The default ui_out */
+/* Tables are special.  Maintain a separate structure that tracks
+   their state.  At present an output can only contain a single table
+   but that restriction might eventually be lifted.  */
 
-struct ui_out def_uiout =
+class ui_out_table
 {
-  0,				/* flags */
-  &default_ui_out_impl,		/* impl */
-};
+ public:
 
-/* Pointer to current ui_out */
-/* FIXME: This should not be a global, but something passed down from main.c
-   or top.c */
-
-struct ui_out *uiout = &def_uiout;
-
-/* These are the interfaces to implementation functions */
-
-static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
-			    int nr_rows, const char *tblid);
-static void uo_table_body (struct ui_out *uiout);
-static void uo_table_end (struct ui_out *uiout);
-static void uo_table_header (struct ui_out *uiout, int width,
-			     enum ui_align align, const char *col_name,
-			     const char *colhdr);
-static void uo_begin (struct ui_out *uiout,
-		      enum ui_out_type type,
-		      int level, const char *id);
-static void uo_end (struct ui_out *uiout,
-		    enum ui_out_type type,
-		    int level);
-static void uo_field_int (struct ui_out *uiout, int fldno, int width,
-			  enum ui_align align, const char *fldname, int value);
-static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
-			   enum ui_align align, const char *fldname);
-static void uo_field_string (struct ui_out *uiout, int fldno, int width,
-			     enum ui_align align, const char *fldname,
-			     const char *string);
-static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
-			  enum ui_align align, const char *fldname,
-			  const char *format, va_list args)
-     ATTR_FORMAT (printf, 6, 0);
-static void uo_spaces (struct ui_out *uiout, int numspaces);
-static void uo_text (struct ui_out *uiout, const char *string);
-static void uo_message (struct ui_out *uiout, int verbosity,
-			const char *format, va_list args)
-     ATTR_FORMAT (printf, 3, 0);
-static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
-static void uo_flush (struct ui_out *uiout);
-static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream);
-
-/* Prototypes for local functions */
-
-extern void _initialize_ui_out (void);
-static void append_header_to_list (struct ui_out *uiout, int width,
-				   int alignment, const char *col_name,
-				   const char *colhdr);
-static int get_next_header (struct ui_out *uiout, int *colno, int *width,
-			    int *alignment, char **colhdr);
-static void clear_header_list (struct ui_out *uiout);
-static void verify_field (struct ui_out *uiout, int *fldno, int *width,
-			  int *align);
-
-/* exported functions (ui_out API) */
-
-/* Mark beginning of a table */
-
-static void
-ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
-		    int nr_rows,
-		    const char *tblid)
-{
-  if (uiout->table.flag)
-    internal_error (__FILE__, __LINE__,
-		    _("tables cannot be nested; table_begin found before \
-previous table_end."));
+  /* States (steps) of a table generation.  */
 
-  uiout->table.flag = 1;
-  uiout->table.body_flag = 0;
-  uiout->table.entry_level = uiout->level + 1;
-  uiout->table.columns = nbrofcols;
-  if (tblid != NULL)
-    uiout->table.id = xstrdup (tblid);
-  else
-    uiout->table.id = NULL;
-  clear_header_list (uiout);
-
-  uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id);
-}
-
-void
-ui_out_table_body (struct ui_out *uiout)
-{
-  if (!uiout->table.flag)
-    internal_error (__FILE__, __LINE__,
-		    _("table_body outside a table is not valid; it must be \
-after a table_begin and before a table_end."));
-  if (uiout->table.body_flag)
-    internal_error (__FILE__, __LINE__,
-		    _("extra table_body call not allowed; there must be \
-only one table_body after a table_begin and before a table_end."));
-  if (uiout->table.header_next->colno != uiout->table.columns)
-    internal_error (__FILE__, __LINE__,
-		    _("number of headers differ from number of table \
-columns."));
+  enum class state
+  {
+    /* We are generating the table headers.  */
+    HEADERS,
 
-  uiout->table.body_flag = 1;
-  uiout->table.header_next = uiout->table.header_first;
+    /* We are generating the table body.  */
+    BODY,
+  };
 
-  uo_table_body (uiout);
-}
+  explicit ui_out_table (int entry_level, int nr_cols, const std::string &id)
+  : m_state (state::HEADERS),
+    m_entry_level (entry_level),
+    m_nr_cols (nr_cols),
+    m_id (id)
+  {
+  }
 
-static void
-ui_out_table_end (struct ui_out *uiout)
-{
-  if (!uiout->table.flag)
-    internal_error (__FILE__, __LINE__,
-		    _("misplaced table_end or missing table_begin."));
+  /* Start building the body of the table.  */
 
-  uiout->table.entry_level = 0;
-  uiout->table.body_flag = 0;
-  uiout->table.flag = 0;
+  void start_body ();
 
-  uo_table_end (uiout);
+  /* Add a new header to the table.  */
 
-  if (uiout->table.id)
-    xfree (uiout->table.id);
-  clear_header_list (uiout);
-}
+  void append_header (int width, ui_align alignment,
+		      const std::string &col_name, const std::string &col_hdr);
 
-void
-ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
-		     const char *col_name,
-		     const char *colhdr)
-{
-  if (!uiout->table.flag || uiout->table.body_flag)
-    internal_error (__FILE__, __LINE__,
-		    _("table header must be specified after table_begin \
-and before table_body."));
+  void start_row ();
 
-  append_header_to_list (uiout, width, alignment, col_name, colhdr);
+  /* Extract the format information for the next header and advance
+     the header iterator.  Return false if there was no next header.  */
 
-  uo_table_header (uiout, width, alignment, col_name, colhdr);
-}
+  bool get_next_header (int *colno, int *width, ui_align *alignment,
+		       const char **col_hdr);
 
-static void
-do_cleanup_table_end (void *data)
-{
-  struct ui_out *ui_out = data;
+  bool query_field (int colno, int *width, int *alignment,
+		    const char **col_name) const;
 
-  ui_out_table_end (ui_out);
-}
+  state current_state () const;
 
-struct cleanup *
-make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols,
-                                     int nr_rows, const char *tblid)
-{
-  ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid);
-  return make_cleanup (do_cleanup_table_end, ui_out);
-}
+  int entry_level () const;
 
-void
-ui_out_begin (struct ui_out *uiout,
-	      enum ui_out_type type,
-	      const char *id)
-{
-  int new_level;
-  if (uiout->table.flag && !uiout->table.body_flag)
-    internal_error (__FILE__, __LINE__,
-		    _("table header or table_body expected; lists must be \
-specified after table_body."));
+ private:
 
-  /* Be careful to verify the ``field'' before the new tuple/list is
-     pushed onto the stack.  That way the containing list/table/row is
-     verified and not the newly created tuple/list.  This verification
-     is needed (at least) for the case where a table row entry
-     contains either a tuple/list.  For that case bookkeeping such as
-     updating the column count or advancing to the next heading still
-     needs to be performed.  */
-  {
-    int fldno;
-    int width;
-    int align;
-    verify_field (uiout, &fldno, &width, &align);
-  }
+  state m_state;
 
-  new_level = push_level (uiout, type, id);
+  /* The level at which each entry of the table is to be found.  A row
+     (a tuple) is made up of entries.  Consequently ENTRY_LEVEL is one
+     above that of the table.  */
+  int m_entry_level;
 
-  /* If the push puts us at the same level as a table row entry, we've
-     got a new table row.  Put the header pointer back to the start.  */
-  if (uiout->table.body_flag
-      && uiout->table.entry_level == new_level)
-    uiout->table.header_next = uiout->table.header_first;
+  /* Number of table columns (as specified in the table_begin call).  */
+  int m_nr_cols;
 
-  uo_begin (uiout, type, new_level, id);
-}
+  /* String identifying the table (as specified in the table_begin
+     call).  */
+  std::string m_id;
 
-void
-ui_out_end (struct ui_out *uiout,
-	    enum ui_out_type type)
-{
-  int old_level = pop_level (uiout, type);
-  uo_end (uiout, type, old_level);
-}
+  /* Pointers to the column headers.  */
+  std::vector<std::unique_ptr<ui_out_hdr>> m_headers;
 
-struct ui_out_end_cleanup_data
-{
-  struct ui_out *uiout;
-  enum ui_out_type type;
+  /* Iterator over the headers vector, used when printing successive fields.  */
+  std::vector<std::unique_ptr<ui_out_hdr>>::const_iterator m_headers_iterator;
 };
 
-static void
-do_cleanup_end (void *data)
-{
-  struct ui_out_end_cleanup_data *end_cleanup_data = data;
-  ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
-  xfree (end_cleanup_data);
-}
+/* See ui-out.h.  */
 
-static struct cleanup *
-make_cleanup_ui_out_end (struct ui_out *uiout,
-			 enum ui_out_type type)
+void ui_out_table::start_body ()
 {
-  struct ui_out_end_cleanup_data *end_cleanup_data;
-  end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data);
-  end_cleanup_data->uiout = uiout;
-  end_cleanup_data->type = type;
-  return make_cleanup (do_cleanup_end, end_cleanup_data);
-}
+  if (m_state != state::HEADERS)
+    internal_error (__FILE__, __LINE__,
+		    _("extra table_body call not allowed; there must be only "
+		      "one table_body after a table_begin and before a "
+		      "table_end."));
 
-struct cleanup *
-make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
-				     const char *id)
-{
-  ui_out_begin (uiout, ui_out_type_tuple, id);
-  return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
-}
+  /* Check if the number of defined headers matches the number of expected
+     columns.  */
+  if (m_headers.size () != m_nr_cols)
+    internal_error (__FILE__, __LINE__,
+		    _("number of headers differ from number of table "
+		      "columns."));
 
-struct cleanup *
-make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
-				    const char *id)
-{
-  ui_out_begin (uiout, ui_out_type_list, id);
-  return make_cleanup_ui_out_end (uiout, ui_out_type_list);
+  m_state = state::BODY;
+  m_headers_iterator = m_headers.begin ();
 }
 
-void
-ui_out_field_int (struct ui_out *uiout,
-		  const char *fldname,
-		  int value)
-{
-  int fldno;
-  int width;
-  int align;
-  struct ui_out_level *current = current_level (uiout);
+/* See ui-out.h.  */
 
-  verify_field (uiout, &fldno, &width, &align);
-
-  uo_field_int (uiout, fldno, width, align, fldname, value);
-}
-
-void
-ui_out_field_fmt_int (struct ui_out *uiout,
-                      int input_width,
-                      enum ui_align input_align,
-		      const char *fldname,
-		      int value)
+void ui_out_table::append_header (int width, ui_align alignment,
+				  const std::string &col_name,
+				  const std::string &col_hdr)
 {
-  int fldno;
-  int width;
-  int align;
-  struct ui_out_level *current = current_level (uiout);
+  if (m_state != state::HEADERS)
+    internal_error (__FILE__, __LINE__,
+		    _("table header must be specified after table_begin and "
+		      "before table_body."));
 
-  verify_field (uiout, &fldno, &width, &align);
+  std::unique_ptr<ui_out_hdr> header (new ui_out_hdr (m_headers.size () + 1,
+							width, alignment,
+							col_name, col_hdr));
 
-  uo_field_int (uiout, fldno, input_width, input_align, fldname, value);
+  m_headers.push_back (std::move (header));
 }
 
-void
-ui_out_field_core_addr (struct ui_out *uiout,
-			const char *fldname,
-			CORE_ADDR address)
-{
-  char addstr[20];
-
-  /* FIXME: cagney/2002-05-03: Need local_address_string() function
-     that returns the language localized string formatted to a width
-     based on TARGET_ADDR_BIT.  */
-  /* deprecated_print_address_numeric (address, 1, local_stream); */
-  if (TARGET_ADDR_BIT <= 32)
-    strcpy (addstr, hex_string_custom (address, 8));
-  else
-    strcpy (addstr, hex_string_custom (address, 16));
+/* See ui-out.h.  */
 
-  ui_out_field_string (uiout, fldname, addstr);
-}
-
-void
-ui_out_field_stream (struct ui_out *uiout,
-		     const char *fldname,
-		     struct ui_stream *buf)
+void ui_out_table::start_row ()
 {
-  long length;
-  char *buffer = ui_file_xstrdup (buf->stream, &length);
-  struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
-  if (length > 0)
-    ui_out_field_string (uiout, fldname, buffer);
-  else
-    ui_out_field_skip (uiout, fldname);
-  ui_file_rewind (buf->stream);
-  do_cleanups (old_cleanup);
+  m_headers_iterator = m_headers.begin ();
 }
 
-/* used to ommit a field */
+/* See ui-out.h.  */
 
-void
-ui_out_field_skip (struct ui_out *uiout,
-		   const char *fldname)
+bool ui_out_table::get_next_header (int *colno, int *width, ui_align *alignment,
+				    const char **col_hdr)
 {
-  int fldno;
-  int width;
-  int align;
+  /* There may be no headers at all or we may have used all columns.  */
+  if (m_headers_iterator == m_headers.end ())
+    return false;
 
-  verify_field (uiout, &fldno, &width, &align);
+  ui_out_hdr *hdr = m_headers_iterator->get ();
 
-  uo_field_skip (uiout, fldno, width, align, fldname);
-}
+  *colno = hdr->number ();
+  *width = hdr->min_width ();
+  *alignment = hdr->alignment ();
+  *col_hdr = hdr->header ().c_str ();
 
-void
-ui_out_field_string (struct ui_out *uiout,
-		     const char *fldname,
-		     const char *string)
-{
-  int fldno;
-  int width;
-  int align;
-
-  verify_field (uiout, &fldno, &width, &align);
+  /* Advance the header pointer to the next entry.  */
+  m_headers_iterator++;
 
-  uo_field_string (uiout, fldno, width, align, fldname, string);
+  return true;
 }
 
-/* VARARGS */
-void
-ui_out_field_fmt (struct ui_out *uiout,
-		  const char *fldname,
-		  const char *format, ...)
+/* See ui-out.h.  */
+
+bool ui_out_table::query_field (int colno, int *width, int *alignment,
+				const char **col_name) const
 {
-  va_list args;
-  int fldno;
-  int width;
-  int align;
+  /* Column numbers are 1-based, so convert to 0-based index.  */
+  int index = colno - 1;
 
-  /* will not align, but has to call anyway */
-  verify_field (uiout, &fldno, &width, &align);
+  if (index >= 0 && index < m_headers.size ())
+    {
+      ui_out_hdr *hdr = m_headers[index].get ();
 
-  va_start (args, format);
+      gdb_assert (colno == hdr->number ());
 
-  uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
+      *width = hdr->min_width ();
+      *alignment = hdr->alignment ();
+      *col_name = hdr->name ().c_str ();
 
-  va_end (args);
+      return true;
+    }
+  else
+    return false;
 }
 
-void
-ui_out_spaces (struct ui_out *uiout, int numspaces)
-{
-  uo_spaces (uiout, numspaces);
-}
+/* See ui-out.h.  */
 
-void
-ui_out_text (struct ui_out *uiout,
-	     const char *string)
+ui_out_table::state ui_out_table::current_state () const
 {
-  uo_text (uiout, string);
+  return m_state;
 }
 
-void
-ui_out_message (struct ui_out *uiout, int verbosity,
-		const char *format,...)
-{
-  va_list args;
-
-  va_start (args, format);
-
-  uo_message (uiout, verbosity, format, args);
-
-  va_end (args);
-}
+/* See ui-out.h.  */
 
-struct ui_stream *
-ui_out_stream_new (struct ui_out *uiout)
+int ui_out_table::entry_level () const
 {
-  struct ui_stream *tempbuf;
-
-  tempbuf = XMALLOC (struct ui_stream);
-  tempbuf->uiout = uiout;
-  tempbuf->stream = mem_fileopen ();
-  return tempbuf;
+  return m_entry_level;
 }
 
-void
-ui_out_stream_delete (struct ui_stream *buf)
+int
+ui_out::level () const
 {
-  ui_file_delete (buf->stream);
-  xfree (buf);
+  return m_levels.size ();
 }
 
-static void
-do_stream_delete (void *buf)
-{
-  ui_out_stream_delete (buf);
-}
+/* The current (inner most) level.  */
 
-struct cleanup *
-make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
+ui_out_level *
+ui_out::current_level () const
 {
-  return make_cleanup (do_stream_delete, buf);
+  return m_levels.back ().get ();
 }
 
-
+/* Create a new level, of TYPE.  */
 void
-ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
+ui_out::push_level (ui_out_type type)
 {
-  uo_wrap_hint (uiout, identstring);
+  std::unique_ptr<ui_out_level> level (new ui_out_level (type));
+
+  m_levels.push_back (std::move (level));
 }
 
+/* Discard the current level.  TYPE is the type of the level being
+   discarded.  */
 void
-ui_out_flush (struct ui_out *uiout)
+ui_out::pop_level (ui_out_type type)
 {
-  uo_flush (uiout);
-}
+  /* We had better not underflow the buffer.  */
+  gdb_assert (m_levels.size () > 0);
+  gdb_assert (current_level ()->type () == type);
 
-int
-ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream)
-{
-  return uo_redirect (uiout, outstream);
+  m_levels.pop_back ();
 }
 
-/* set the flags specified by the mask given */
-int
-ui_out_set_flags (struct ui_out *uiout, int mask)
+/* Mark beginning of a table.  */
+
+void
+ui_out::table_begin (int nr_cols, int nr_rows, const std::string &tblid)
 {
-  int oldflags = uiout->flags;
+  if (m_table_up != nullptr)
+    internal_error (__FILE__, __LINE__,
+		    _("tables cannot be nested; table_begin found before \
+previous table_end."));
 
-  uiout->flags |= mask;
+  m_table_up.reset (new ui_out_table (level () + 1, nr_cols, tblid));
 
-  return oldflags;
+  do_table_begin (nr_cols, nr_rows, tblid.c_str ());
 }
 
-/* clear the flags specified by the mask given */
-int
-ui_out_clear_flags (struct ui_out *uiout, int mask)
+void
+ui_out::table_header (int width, ui_align alignment,
+		      const std::string &col_name, const std::string &col_hdr)
 {
-  int oldflags = uiout->flags;
+  if (m_table_up == nullptr)
+    internal_error (__FILE__, __LINE__,
+		    _("table_header outside a table is not valid; it must be \
+after a table_begin and before a table_body."));
 
-  uiout->flags &= ~mask;
+  m_table_up->append_header (width, alignment, col_name, col_hdr);
 
-  return oldflags;
+  do_table_header (width, alignment, col_name, col_hdr);
 }
 
-/* test the flags against the mask given */
-int
-ui_out_test_flags (struct ui_out *uiout, int mask)
+void
+ui_out::table_body ()
 {
-  return (uiout->flags & mask);
-}
+  if (m_table_up == nullptr)
+    internal_error (__FILE__, __LINE__,
+		    _("table_body outside a table is not valid; it must be "
+		      "after a table_begin and before a table_end."));
 
-/* obtain the current verbosity level (as stablished by the
-   'set verbositylevel' command */
+  m_table_up->start_body ();
 
-int
-ui_out_get_verblvl (struct ui_out *uiout)
-{
-  /* FIXME: not implemented yet */
-  return 0;
+  do_table_body ();
 }
 
-#if 0
 void
-ui_out_result_begin (struct ui_out *uiout, char *class)
+ui_out::table_end ()
 {
-}
+  if (m_table_up == nullptr)
+    internal_error (__FILE__, __LINE__,
+		    _("misplaced table_end or missing table_begin."));
 
-void
-ui_out_result_end (struct ui_out *uiout)
-{
-}
+  do_table_end ();
 
-void
-ui_out_info_begin (struct ui_out *uiout, char *class)
-{
+  m_table_up = nullptr;
 }
 
 void
-ui_out_info_end (struct ui_out *uiout)
+ui_out::begin (ui_out_type type, const char *id)
 {
-}
+  /* Be careful to verify the ``field'' before the new tuple/list is
+     pushed onto the stack.  That way the containing list/table/row is
+     verified and not the newly created tuple/list.  This verification
+     is needed (at least) for the case where a table row entry
+     contains either a tuple/list.  For that case bookkeeping such as
+     updating the column count or advancing to the next heading still
+     needs to be performed.  */
+  {
+    int fldno;
+    int width;
+    ui_align align;
 
-void
-ui_out_notify_begin (struct ui_out *uiout, char *class)
-{
+    verify_field (&fldno, &width, &align);
+  }
+
+  push_level (type);
+
+  /* If the push puts us at the same level as a table row entry, we've
+     got a new table row.  Put the header pointer back to the start.  */
+  if (m_table_up != nullptr
+      && m_table_up->current_state () == ui_out_table::state::BODY
+      && m_table_up->entry_level () == level ())
+    m_table_up->start_row ();
+
+  do_begin (type, id);
 }
 
 void
-ui_out_notify_end (struct ui_out *uiout)
+ui_out::end (ui_out_type type)
 {
+  pop_level (type);
+
+  do_end (type);
 }
 
 void
-ui_out_error_begin (struct ui_out *uiout, char *class)
+ui_out::field_signed (const char *fldname, LONGEST value)
 {
+  int fldno;
+  int width;
+  ui_align align;
+
+  verify_field (&fldno, &width, &align);
+
+  do_field_signed (fldno, width, align, fldname, value);
 }
 
 void
-ui_out_error_end (struct ui_out *uiout)
+ui_out::field_fmt_signed (int input_width, ui_align input_align,
+			  const char *fldname, LONGEST value)
 {
+  int fldno;
+  int width;
+  ui_align align;
+
+  verify_field (&fldno, &width, &align);
+
+  do_field_signed (fldno, input_width, input_align, fldname, value);
 }
-#endif
 
-#if 0
+/* See ui-out.h.  */
+
 void
-gdb_error (ui_out * uiout, int severity, char *format,...)
+ui_out::field_unsigned (const char *fldname, ULONGEST value)
 {
-  va_list args;
+  int fldno;
+  int width;
+  ui_align align;
+
+  verify_field (&fldno, &width, &align);
+
+  do_field_unsigned (fldno, width, align, fldname, value);
 }
 
+/* Documented in ui-out.h.  */
+
 void
-gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
+ui_out::field_core_addr (const char *fldname, struct gdbarch *gdbarch,
+			 CORE_ADDR address)
 {
+  field_string (fldname, print_core_address (gdbarch, address),
+		address_style.style ());
 }
-#endif
 
-int
-ui_out_is_mi_like_p (struct ui_out *uiout)
+void
+ui_out::field_stream (const char *fldname, string_file &stream,
+		      const ui_file_style &style)
 {
-  return uiout->impl->is_mi_like_p;
+  if (!stream.empty ())
+    field_string (fldname, stream.c_str (), style);
+  else
+    field_skip (fldname);
+  stream.clear ();
 }
 
-/* default gdb-out hook functions */
+/* Used to omit a field.  */
 
-static void
-default_table_begin (struct ui_out *uiout, int nbrofcols,
-		     int nr_rows,
-		     const char *tblid)
+void
+ui_out::field_skip (const char *fldname)
 {
-}
+  int fldno;
+  int width;
+  ui_align align;
 
-static void
-default_table_body (struct ui_out *uiout)
-{
-}
+  verify_field (&fldno, &width, &align);
 
-static void
-default_table_end (struct ui_out *uiout)
-{
+  do_field_skip (fldno, width, align, fldname);
 }
 
-static void
-default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
-		      const char *col_name,
-		      const char *colhdr)
+void
+ui_out::field_string (const char *fldname, const char *string,
+		      const ui_file_style &style)
 {
-}
+  int fldno;
+  int width;
+  ui_align align;
 
-static void
-default_begin (struct ui_out *uiout,
-	       enum ui_out_type type,
-	       int level,
-	       const char *id)
-{
-}
+  verify_field (&fldno, &width, &align);
 
-static void
-default_end (struct ui_out *uiout,
-	     enum ui_out_type type,
-	     int level)
-{
+  do_field_string (fldno, width, align, fldname, string, style);
 }
 
-static void
-default_field_int (struct ui_out *uiout, int fldno, int width,
-		   enum ui_align align,
-		   const char *fldname, int value)
+void
+ui_out::field_string (const char *fldname, const std::string &string)
 {
+  field_string (fldname, string.c_str ());
 }
 
-static void
-default_field_skip (struct ui_out *uiout, int fldno, int width,
-		    enum ui_align align, const char *fldname)
+/* VARARGS */
+void
+ui_out::field_fmt (const char *fldname, const char *format, ...)
 {
-}
+  va_list args;
+  int fldno;
+  int width;
+  ui_align align;
 
-static void
-default_field_string (struct ui_out *uiout,
-		      int fldno,
-		      int width,
-		      enum ui_align align,
-		      const char *fldname,
-		      const char *string)
-{
-}
+  verify_field (&fldno, &width, &align);
 
-static void
-default_field_fmt (struct ui_out *uiout, int fldno, int width,
-		   enum ui_align align,
-		   const char *fldname,
-		   const char *format,
-		   va_list args)
-{
-}
+  va_start (args, format);
 
-static void
-default_spaces (struct ui_out *uiout, int numspaces)
-{
-}
+  do_field_fmt (fldno, width, align, fldname, ui_file_style (), format, args);
 
-static void
-default_text (struct ui_out *uiout, const char *string)
-{
+  va_end (args);
 }
 
-static void
-default_message (struct ui_out *uiout, int verbosity,
-		 const char *format,
-		 va_list args)
+void
+ui_out::field_fmt (const char *fldname, const ui_file_style &style,
+		   const char *format, ...)
 {
-}
+  va_list args;
+  int fldno;
+  int width;
+  ui_align align;
 
-static void
-default_wrap_hint (struct ui_out *uiout, char *identstring)
-{
-}
+  verify_field (&fldno, &width, &align);
 
-static void
-default_flush (struct ui_out *uiout)
-{
-}
+  va_start (args, format);
 
-/* Interface to the implementation functions */
+  do_field_fmt (fldno, width, align, fldname, style, format, args);
 
-void
-uo_table_begin (struct ui_out *uiout, int nbrofcols,
-		int nr_rows,
-		const char *tblid)
-{
-  if (!uiout->impl->table_begin)
-    return;
-  uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
+  va_end (args);
 }
 
 void
-uo_table_body (struct ui_out *uiout)
+ui_out::spaces (int numspaces)
 {
-  if (!uiout->impl->table_body)
-    return;
-  uiout->impl->table_body (uiout);
+  do_spaces (numspaces);
 }
 
 void
-uo_table_end (struct ui_out *uiout)
+ui_out::text (const char *string)
 {
-  if (!uiout->impl->table_end)
-    return;
-  uiout->impl->table_end (uiout);
+  do_text (string);
 }
 
 void
-uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
-		 const char *col_name,
-		 const char *colhdr)
+ui_out::call_do_message (const ui_file_style &style, const char *format,
+			 ...)
 {
-  if (!uiout->impl->table_header)
-    return;
-  uiout->impl->table_header (uiout, width, align, col_name, colhdr);
-}
+  va_list args;
 
-void
-uo_begin (struct ui_out *uiout,
-	  enum ui_out_type type,
-	  int level,
-	  const char *id)
-{
-  if (uiout->impl->begin == NULL)
-    return;
-  uiout->impl->begin (uiout, type, level, id);
-}
+  va_start (args, format);
 
-void
-uo_end (struct ui_out *uiout,
-	enum ui_out_type type,
-	int level)
-{
-  if (uiout->impl->end == NULL)
-    return;
-  uiout->impl->end (uiout, type, level);
-}
+  /* Since call_do_message is only used as a helper of vmessage, silence the
+     warning here once instead of at all call sites in vmessage, if we were
+     to put a "format" attribute on call_do_message.  */
+  DIAGNOSTIC_PUSH
+  DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
+  do_message (style, format, args);
+  DIAGNOSTIC_POP
 
-void
-uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
-	      const char *fldname,
-	      int value)
-{
-  if (!uiout->impl->field_int)
-    return;
-  uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
+  va_end (args);
 }
 
 void
-uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
-	       const char *fldname)
+ui_out::vmessage (const ui_file_style &in_style, const char *format,
+		  va_list args)
 {
-  if (!uiout->impl->field_skip)
-    return;
-  uiout->impl->field_skip (uiout, fldno, width, align, fldname);
-}
+  format_pieces fpieces (&format, true);
 
-void
-uo_field_string (struct ui_out *uiout, int fldno, int width,
-		 enum ui_align align,
-		 const char *fldname,
-		 const char *string)
-{
-  if (!uiout->impl->field_string)
-    return;
-  uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
-}
+  ui_file_style style = in_style;
 
-void
-uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
-	      const char *fldname,
-	      const char *format,
-	      va_list args)
-{
-  if (!uiout->impl->field_fmt)
-    return;
-  uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
+  for (auto &&piece : fpieces)
+    {
+      const char *current_substring = piece.string;
+
+      gdb_assert (piece.n_int_args >= 0 && piece.n_int_args <= 2);
+      int intvals[2] = { 0, 0 };
+      for (int i = 0; i < piece.n_int_args; ++i)
+	intvals[i] = va_arg (args, int);
+
+      /* The only ones we support for now.  */
+      gdb_assert (piece.n_int_args == 0
+		  || piece.argclass == string_arg
+		  || piece.argclass == int_arg
+		  || piece.argclass == long_arg);
+
+      switch (piece.argclass)
+	{
+	case string_arg:
+	  {
+	    const char *str = va_arg (args, const char *);
+	    switch (piece.n_int_args)
+	      {
+	      case 0:
+		call_do_message (style, current_substring, str);
+		break;
+	      case 1:
+		call_do_message (style, current_substring, intvals[0], str);
+		break;
+	      case 2:
+		call_do_message (style, current_substring,
+				 intvals[0], intvals[1], str);
+		break;
+	      }
+	  }
+	  break;
+	case wide_string_arg:
+	  gdb_assert_not_reached (_("wide_string_arg not supported in vmessage"));
+	  break;
+	case wide_char_arg:
+	  gdb_assert_not_reached (_("wide_char_arg not supported in vmessage"));
+	  break;
+	case long_long_arg:
+	  call_do_message (style, current_substring, va_arg (args, long long));
+	  break;
+	case int_arg:
+	  {
+	    int val = va_arg (args, int);
+	    switch (piece.n_int_args)
+	      {
+	      case 0:
+		call_do_message (style, current_substring, val);
+		break;
+	      case 1:
+		call_do_message (style, current_substring, intvals[0], val);
+		break;
+	      case 2:
+		call_do_message (style, current_substring,
+				 intvals[0], intvals[1], val);
+		break;
+	      }
+	  }
+	  break;
+	case long_arg:
+	  {
+	    long val = va_arg (args, long);
+	    switch (piece.n_int_args)
+	      {
+	      case 0:
+		call_do_message (style, current_substring, val);
+		break;
+	      case 1:
+		call_do_message (style, current_substring, intvals[0], val);
+		break;
+	      case 2:
+		call_do_message (style, current_substring,
+				 intvals[0], intvals[1], val);
+		break;
+	      }
+	  }
+	  break;
+	case size_t_arg:
+	  {
+	    size_t val = va_arg (args, size_t);
+	    switch (piece.n_int_args)
+	      {
+	      case 0:
+		call_do_message (style, current_substring, val);
+		break;
+	      case 1:
+		call_do_message (style, current_substring, intvals[0], val);
+		break;
+	      case 2:
+		call_do_message (style, current_substring,
+				 intvals[0], intvals[1], val);
+		break;
+	      }
+	  }
+	  break;
+	case double_arg:
+	  call_do_message (style, current_substring, va_arg (args, double));
+	  break;
+	case long_double_arg:
+	  gdb_assert_not_reached (_("long_double_arg not supported in vmessage"));
+	  break;
+	case dec32float_arg:
+	  gdb_assert_not_reached (_("dec32float_arg not supported in vmessage"));
+	  break;
+	case dec64float_arg:
+	  gdb_assert_not_reached (_("dec64float_arg not supported in vmessage"));
+	  break;
+	case dec128float_arg:
+	  gdb_assert_not_reached (_("dec128float_arg not supported in vmessage"));
+	  break;
+	case ptr_arg:
+	  switch (current_substring[2])
+	    {
+	    case 'F':
+	      {
+		gdb_assert (!test_flags (disallow_ui_out_field));
+		base_field_s *bf = va_arg (args, base_field_s *);
+		switch (bf->kind)
+		  {
+		  case field_kind::SIGNED:
+		    {
+		      auto *f = (signed_field_s *) bf;
+		      field_signed (f->name, f->val);
+		    }
+		    break;
+		  case field_kind::STRING:
+		    {
+		      auto *f = (string_field_s *) bf;
+		      field_string (f->name, f->str);
+		    }
+		    break;
+		  }
+	      }
+	      break;
+	    case 's':
+	      {
+		styled_string_s *ss = va_arg (args, styled_string_s *);
+		call_do_message (ss->style, "%s", ss->str);
+	      }
+	      break;
+	    case '[':
+	      style = *va_arg (args, const ui_file_style *);
+	      break;
+	    case ']':
+	      {
+		void *arg = va_arg (args, void *);
+		gdb_assert (arg == nullptr);
+
+		style = {};
+	      }
+	      break;
+	    default:
+	      call_do_message (style, current_substring, va_arg (args, void *));
+	      break;
+	    }
+	  break;
+	case literal_piece:
+	  /* Print a portion of the format string that has no
+	     directives.  Note that this will not include any ordinary
+	     %-specs, but it might include "%%".  That is why we use
+	     call_do_message here.  Also, we pass a dummy argument
+	     because some platforms have modified GCC to include
+	     -Wformat-security by default, which will warn here if
+	     there is no argument.  */
+	  call_do_message (style, current_substring, 0);
+	  break;
+	default:
+	  internal_error (__FILE__, __LINE__,
+			  _("failed internal consistency check"));
+	}
+    }
 }
 
 void
-uo_spaces (struct ui_out *uiout, int numspaces)
+ui_out::message (const char *format, ...)
 {
-  if (!uiout->impl->spaces)
-    return;
-  uiout->impl->spaces (uiout, numspaces);
-}
+  va_list args;
+  va_start (args, format);
 
-void
-uo_text (struct ui_out *uiout,
-	 const char *string)
-{
-  if (!uiout->impl->text)
-    return;
-  uiout->impl->text (uiout, string);
-}
+  vmessage (ui_file_style (), format, args);
 
-void
-uo_message (struct ui_out *uiout, int verbosity,
-	    const char *format,
-	    va_list args)
-{
-  if (!uiout->impl->message)
-    return;
-  uiout->impl->message (uiout, verbosity, format, args);
+  va_end (args);
 }
 
 void
-uo_wrap_hint (struct ui_out *uiout, char *identstring)
+ui_out::wrap_hint (const char *identstring)
 {
-  if (!uiout->impl->wrap_hint)
-    return;
-  uiout->impl->wrap_hint (uiout, identstring);
+  do_wrap_hint (identstring);
 }
 
 void
-uo_flush (struct ui_out *uiout)
-{
-  if (!uiout->impl->flush)
-    return;
-  uiout->impl->flush (uiout);
-}
-
-int
-uo_redirect (struct ui_out *uiout, struct ui_file *outstream)
+ui_out::flush ()
 {
-  if (!uiout->impl->redirect)
-    return -1;
-  uiout->impl->redirect (uiout, outstream);
-  return 0;
+  do_flush ();
 }
 
-/* local functions */
-
-/* list of column headers manipulation routines */
-
-static void
-clear_header_list (struct ui_out *uiout)
+void
+ui_out::redirect (ui_file *outstream)
 {
-  while (uiout->table.header_first != NULL)
-    {
-      uiout->table.header_next = uiout->table.header_first;
-      uiout->table.header_first = uiout->table.header_first->next;
-      if (uiout->table.header_next->colhdr != NULL)
-	xfree (uiout->table.header_next->colhdr);
-      xfree (uiout->table.header_next);
-    }
-  gdb_assert (uiout->table.header_first == NULL);
-  uiout->table.header_last = NULL;
-  uiout->table.header_next = NULL;
+  do_redirect (outstream);
 }
 
-static void
-append_header_to_list (struct ui_out *uiout,
-		       int width,
-		       int alignment,
-		       const char *col_name,
-		       const char *colhdr)
+/* Test the flags against the mask given.  */
+ui_out_flags
+ui_out::test_flags (ui_out_flags mask)
 {
-  struct ui_out_hdr *temphdr;
-
-  temphdr = XMALLOC (struct ui_out_hdr);
-  temphdr->width = width;
-  temphdr->alignment = alignment;
-  /* we have to copy the column title as the original may be an automatic */
-  if (colhdr != NULL)
-    temphdr->colhdr = xstrdup (colhdr);
-  else
-    temphdr->colhdr = NULL;
-  if (col_name != NULL)
-    temphdr->col_name = xstrdup (colhdr);
-  else
-    temphdr->col_name = xstrdup (colhdr);
-  temphdr->next = NULL;
-  if (uiout->table.header_first == NULL)
-    {
-      temphdr->colno = 1;
-      uiout->table.header_first = temphdr;
-      uiout->table.header_last = temphdr;
-    }
-  else
-    {
-      temphdr->colno = uiout->table.header_last->colno + 1;
-      uiout->table.header_last->next = temphdr;
-      uiout->table.header_last = temphdr;
-    }
-  uiout->table.header_next = uiout->table.header_last;
+  return m_flags & mask;
 }
 
-/* Extract the format information for the NEXT header and and advance
-   the header pointer.  Return 0 if there was no next header.  */
-
-static int
-get_next_header (struct ui_out *uiout,
-		 int *colno,
-		 int *width,
-		 int *alignment,
-		 char **colhdr)
+bool
+ui_out::is_mi_like_p () const
 {
-  /* There may be no headers at all or we may have used all columns.  */
-  if (uiout->table.header_next == NULL)
-    return 0;
-  *colno = uiout->table.header_next->colno;
-  *width = uiout->table.header_next->width;
-  *alignment = uiout->table.header_next->alignment;
-  *colhdr = uiout->table.header_next->colhdr;
-  /* Advance the header pointer to the next entry.  */
-  uiout->table.header_next = uiout->table.header_next->next;
-  return 1;
+  return do_is_mi_like_p ();
 }
 
-
 /* Verify that the field/tuple/list is correctly positioned.  Return
    the field number and corresponding alignment (if
    available/applicable).  */
 
-static void
-verify_field (struct ui_out *uiout, int *fldno, int *width, int *align)
+void
+ui_out::verify_field (int *fldno, int *width, ui_align *align)
 {
-  struct ui_out_level *current = current_level (uiout);
-  char *text;
+  ui_out_level *current = current_level ();
+  const char *text;
 
-  if (uiout->table.flag)
+  if (m_table_up != nullptr
+      && m_table_up->current_state () != ui_out_table::state::BODY)
     {
-      if (!uiout->table.body_flag)
-	internal_error (__FILE__, __LINE__,
-			_("table_body missing; table fields must be \
+      internal_error (__FILE__, __LINE__,
+		      _("table_body missing; table fields must be \
 specified after table_body and inside a list."));
-      /* NOTE: cagney/2001-12-08: There was a check here to ensure
-	 that this code was only executed when uiout->level was
-	 greater than zero.  That no longer applies - this code is run
-	 before each table row tuple is started and at that point the
-	 level is zero.  */
     }
 
-  current->field_count += 1;
+  current->inc_field_count ();
 
-  if (uiout->table.body_flag
-      && uiout->table.entry_level == uiout->level
-      && get_next_header (uiout, fldno, width, align, &text))
+  if (m_table_up != nullptr
+      && m_table_up->current_state () == ui_out_table::state::BODY
+      && m_table_up->entry_level () == level ()
+      && m_table_up->get_next_header (fldno, width, align, &text))
     {
-      if (*fldno != current->field_count)
+      if (*fldno != current->field_count ())
 	internal_error (__FILE__, __LINE__,
 			_("ui-out internal error in handling headers."));
     }
@@ -1116,51 +859,31 @@ specified after table_body and inside a list."));
     {
       *width = 0;
       *align = ui_noalign;
-      *fldno = current->field_count;
+      *fldno = current->field_count ();
     }
 }
 
+/* Access table field parameters.  */
 
-/* access to ui_out format private members */
-
-void
-ui_out_get_field_separator (struct ui_out *uiout)
+bool
+ui_out::query_table_field (int colno, int *width, int *alignment,
+			   const char **col_name)
 {
-}
-
-/* Access to ui-out members data */
+  if (m_table_up == nullptr)
+    return false;
 
-struct ui_out_data *
-ui_out_data (struct ui_out *uiout)
-{
-  return uiout->data;
+  return m_table_up->query_field (colno, width, alignment, col_name);
 }
 
-/* initalize private members at startup */
+/* The constructor.  */
 
-struct ui_out *
-ui_out_new (struct ui_out_impl *impl,
-	    struct ui_out_data *data,
-	    int flags)
+ui_out::ui_out (ui_out_flags flags)
+: m_flags (flags)
 {
-  struct ui_out *uiout = XMALLOC (struct ui_out);
-  uiout->data = data;
-  uiout->impl = impl;
-  uiout->flags = flags;
-  uiout->table.flag = 0;
-  uiout->table.body_flag = 0;
-  uiout->level = 0;
-  memset (uiout->levels, 0, sizeof (uiout->levels));
-  uiout->table.header_first = NULL;
-  uiout->table.header_last = NULL;
-  uiout->table.header_next = NULL;
-  return uiout;
+  /* Create the ui-out level #1, the default level.  */
+  push_level (ui_out_type_tuple);
 }
 
-/* standard gdb initialization hook */
-
-void
-_initialize_ui_out (void)
+ui_out::~ui_out ()
 {
-  /* nothing needs to be done */
 }