/* Output generating routines for GDB CLI.

   Copyright (C) 1999, 2000, 2002, 2003, 2005, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.

   Contributed by Cygnus Solutions.
   Written by Fernando Nasser for Cygnus.

   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/>.  */

#include "defs.h"
#include "ui-out.h"
#include "cli-out.h"
#include "gdb_string.h"
#include "gdb_assert.h"
#include "vec.h"

typedef struct cli_ui_out_data cli_out_data;


/* Prototypes for local functions */

static void cli_text (struct ui_out *uiout, const char *string);

static void field_separator (void);

static void out_field_fmt (struct ui_out *uiout, int fldno,
			   const char *fldname,
			   const char *format,...) ATTRIBUTE_PRINTF (4, 5);

/* These are the CLI output functions */

/* Mark beginning of a table */

static void
cli_table_begin (struct ui_out *uiout, int nbrofcols,
		 int nr_rows,
		 const char *tblid)
{
  cli_out_data *data = ui_out_data (uiout);

  if (nr_rows == 0)
    data->suppress_output = 1;
  else
    /* Only the table suppresses the output and, fortunately, a table
       is not a recursive data structure.  */
    gdb_assert (data->suppress_output == 0);
}

/* Mark beginning of a table body */

static void
cli_table_body (struct ui_out *uiout)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;
  /* first, close the table header line */
  cli_text (uiout, "\n");
}

/* Mark end of a table */

static void
cli_table_end (struct ui_out *uiout)
{
  cli_out_data *data = ui_out_data (uiout);

  data->suppress_output = 0;
}

/* Specify table header */

static void
cli_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
		  const char *col_name,
		  const char *colhdr)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;

  /* Always go through the function pointer (virtual function call).
     We may have been extended.  */
  uo_field_string (uiout, 0, width, alignment, 0, colhdr);
}

/* Mark beginning of a list */

static void
cli_begin (struct ui_out *uiout,
	   enum ui_out_type type,
	   int level,
	   const char *id)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;
}

/* Mark end of a list */

static void
cli_end (struct ui_out *uiout,
	 enum ui_out_type type,
	 int level)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;
}

/* output an int field */

static void
cli_field_int (struct ui_out *uiout, int fldno, int width,
	       enum ui_align alignment,
	       const char *fldname, int value)
{
  char buffer[20];	/* FIXME: how many chars long a %d can become? */
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;
  sprintf (buffer, "%d", value);

  /* Always go through the function pointer (virtual function call).
     We may have been extended.  */
  uo_field_string (uiout, fldno, width, alignment, fldname, buffer);
}

/* used to ommit a field */

static void
cli_field_skip (struct ui_out *uiout, int fldno, int width,
		enum ui_align alignment,
		const char *fldname)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;

  /* Always go through the function pointer (virtual function call).
     We may have been extended.  */
  uo_field_string (uiout, fldno, width, alignment, fldname, "");
}

/* other specific cli_field_* end up here so alignment and field
   separators are both handled by cli_field_string */

static void
cli_field_string (struct ui_out *uiout,
		  int fldno,
		  int width,
		  enum ui_align align,
		  const char *fldname,
		  const char *string)
{
  int before = 0;
  int after = 0;
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;

  if ((align != ui_noalign) && string)
    {
      before = width - strlen (string);
      if (before <= 0)
	before = 0;
      else
	{
	  if (align == ui_right)
	    after = 0;
	  else if (align == ui_left)
	    {
	      after = before;
	      before = 0;
	    }
	  else
	    /* ui_center */
	    {
	      after = before / 2;
	      before -= after;
	    }
	}
    }

  if (before)
    ui_out_spaces (uiout, before);
  if (string)
    out_field_fmt (uiout, fldno, fldname, "%s", string);
  if (after)
    ui_out_spaces (uiout, after);

  if (align != ui_noalign)
    field_separator ();
}

/* This is the only field function that does not align.  */

static void ATTRIBUTE_PRINTF (6, 0)
cli_field_fmt (struct ui_out *uiout, int fldno,
	       int width, enum ui_align align,
	       const char *fldname,
	       const char *format,
	       va_list args)
{
  cli_out_data *data = ui_out_data (uiout);
  struct ui_file *stream;

  if (data->suppress_output)
    return;

  stream = VEC_last (ui_filep, data->streams);
  vfprintf_filtered (stream, format, args);

  if (align != ui_noalign)
    field_separator ();
}

static void
cli_spaces (struct ui_out *uiout, int numspaces)
{
  cli_out_data *data = ui_out_data (uiout);
  struct ui_file *stream;

  if (data->suppress_output)
    return;

  stream = VEC_last (ui_filep, data->streams);
  print_spaces_filtered (numspaces, stream);
}

static void
cli_text (struct ui_out *uiout, const char *string)
{
  cli_out_data *data = ui_out_data (uiout);
  struct ui_file *stream;

  if (data->suppress_output)
    return;

  stream = VEC_last (ui_filep, data->streams);
  fputs_filtered (string, stream);
}

static void ATTRIBUTE_PRINTF (3, 0)
cli_message (struct ui_out *uiout, int verbosity,
	     const char *format, va_list args)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;

  if (ui_out_get_verblvl (uiout) >= verbosity)
    {
      struct ui_file *stream = VEC_last (ui_filep, data->streams);

      vfprintf_unfiltered (stream, format, args);
    }
}

static void
cli_wrap_hint (struct ui_out *uiout, char *identstring)
{
  cli_out_data *data = ui_out_data (uiout);

  if (data->suppress_output)
    return;
  wrap_here (identstring);
}

static void
cli_flush (struct ui_out *uiout)
{
  cli_out_data *data = ui_out_data (uiout);
  struct ui_file *stream = VEC_last (ui_filep, data->streams);

  gdb_flush (stream);
}

/* OUTSTREAM as non-NULL will push OUTSTREAM on the stack of output streams
   and make it therefore active.  OUTSTREAM as NULL will pop the last pushed
   output stream; it is an internal error if it does not exist.  */

static int
cli_redirect (struct ui_out *uiout, struct ui_file *outstream)
{
  cli_out_data *data = ui_out_data (uiout);

  if (outstream != NULL)
    VEC_safe_push (ui_filep, data->streams, outstream);
  else
    VEC_pop (ui_filep, data->streams);

  return 0;
}

/* local functions */

/* Like cli_field_fmt, but takes a variable number of args
   and makes a va_list and does not insert a separator.  */

/* VARARGS */
static void
out_field_fmt (struct ui_out *uiout, int fldno,
	       const char *fldname,
	       const char *format,...)
{
  cli_out_data *data = ui_out_data (uiout);
  struct ui_file *stream = VEC_last (ui_filep, data->streams);
  va_list args;

  va_start (args, format);
  vfprintf_filtered (stream, format, args);

  va_end (args);
}

/* Access to ui_out format private members.  */

static void
field_separator (void)
{
  cli_out_data *data = ui_out_data (current_uiout);
  struct ui_file *stream = VEC_last (ui_filep, data->streams);

  fputc_filtered (' ', stream);
}

/* This is the CLI ui-out implementation functions vector */

/* FIXME: This can be initialized dynamically after default is set to
   handle initial output in main.c */

struct ui_out_impl cli_ui_out_impl =
{
  cli_table_begin,
  cli_table_body,
  cli_table_end,
  cli_table_header,
  cli_begin,
  cli_end,
  cli_field_int,
  cli_field_skip,
  cli_field_string,
  cli_field_fmt,
  cli_spaces,
  cli_text,
  cli_message,
  cli_wrap_hint,
  cli_flush,
  cli_redirect,
  0, /* Does not need MI hacks (i.e. needs CLI hacks).  */
};

/* Constructor for a `cli_out_data' object.  */

void
cli_out_data_ctor (cli_out_data *self, struct ui_file *stream)
{
  gdb_assert (stream != NULL);

  self->streams = NULL;
  VEC_safe_push (ui_filep, self->streams, stream);

  self->suppress_output = 0;
}

/* Initialize private members at startup.  */

struct ui_out *
cli_out_new (struct ui_file *stream)
{
  int flags = ui_source_list;
  cli_out_data *data = XMALLOC (cli_out_data);

  cli_out_data_ctor (data, stream);
  return ui_out_new (&cli_ui_out_impl, data, flags);
}

struct ui_file *
cli_out_set_stream (struct ui_out *uiout, struct ui_file *stream)
{
  cli_out_data *data = ui_out_data (uiout);
  struct ui_file *old;
  
  old = VEC_pop (ui_filep, data->streams);
  VEC_quick_push (ui_filep, data->streams, stream);

  return old;
}
