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/* CLI Definitions for GDB, the GNU debugger.

   Copyright (c) 2002, 2003, 2007, 2008, 2009, 2010

   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/>.  */

#include "defs.h"

#include "interps.h"

#include "wrapper.h"

#include "event-top.h"

#include "ui-out.h"

#include "cli-out.h"

#include "top.h"                /* for "execute_command" */

#include "gdb_string.h"

#include "exceptions.h"

struct ui_out *cli_uiout;

/* These are the ui_out and the interpreter for the console interpreter.  */

/* Longjmp-safe wrapper for "execute_command".  */

static struct gdb_exception safe_execute_command (struct ui_out *uiout,

                                                  char *command, int from_tty);

struct captured_execute_command_args

{

  char *command;

  int from_tty;

};

/* These implement the cli out interpreter: */

static void *

cli_interpreter_init (int top_level)

{

  return NULL;

}

static int

cli_interpreter_resume (void *data)

{

  struct ui_file *stream;

  /*sync_execution = 1; */

  /* gdb_setup_readline will change gdb_stdout.  If the CLI was previously

     writing to gdb_stdout, then set it to the new gdb_stdout afterwards.  */

  stream = cli_out_set_stream (cli_uiout, gdb_stdout);

  if (stream != gdb_stdout)

    {

      cli_out_set_stream (cli_uiout, stream);

      stream = NULL;

    }

  gdb_setup_readline ();

  if (stream != NULL)

    cli_out_set_stream (cli_uiout, gdb_stdout);

  return 1;

}

static int

cli_interpreter_suspend (void *data)

{

  gdb_disable_readline ();

  return 1;

}

/* Don't display the prompt if we are set quiet.  */

static int

cli_interpreter_display_prompt_p (void *data)

{

  if (interp_quiet_p (NULL))

    return 0;

  else

    return 1;

}

static struct gdb_exception

cli_interpreter_exec (void *data, const char *command_str)

{

  struct ui_file *old_stream;

  struct gdb_exception result;

  /* FIXME: cagney/2003-02-01: Need to const char *propogate

     safe_execute_command.  */

  char *str = strcpy (alloca (strlen (command_str) + 1), command_str);

  /* gdb_stdout could change between the time cli_uiout was initialized

     and now. Since we're probably using a different interpreter which has

     a new ui_file for gdb_stdout, use that one instead of the default.

     It is important that it gets reset everytime, since the user could

     set gdb to use a different interpreter.  */

  old_stream = cli_out_set_stream (cli_uiout, gdb_stdout);

  result = safe_execute_command (cli_uiout, str, 1);

  cli_out_set_stream (cli_uiout, old_stream);

  return result;

}

static void

do_captured_execute_command (struct ui_out *uiout, void *data)

{

  struct captured_execute_command_args *args =

    (struct captured_execute_command_args *) data;

  execute_command (args->command, args->from_tty);

}

static struct gdb_exception

safe_execute_command (struct ui_out *uiout, char *command, int from_tty)

{

  struct gdb_exception e;

  struct captured_execute_command_args args;

  args.command = command;

  args.from_tty = from_tty;

  e = catch_exception (uiout, do_captured_execute_command, &args,

                       RETURN_MASK_ALL);

  /* FIXME: cagney/2005-01-13: This shouldn't be needed.  Instead the

     caller should print the exception.  */

  exception_print (gdb_stderr, e);

  return e;

}

/* Standard gdb initialization hook.  */

extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */

void

_initialize_cli_interp (void)

{

  static const struct interp_procs procs = {

    cli_interpreter_init,       /* init_proc */

    cli_interpreter_resume,     /* resume_proc */

    cli_interpreter_suspend,    /* suspend_proc */

    cli_interpreter_exec,       /* exec_proc */

    cli_interpreter_display_prompt_p    /* prompt_proc_p */

  };

  struct interp *cli_interp;

  /* Create a default uiout builder for the CLI.  */

  cli_uiout = cli_out_new (gdb_stdout);

  cli_interp = interp_new (INTERP_CONSOLE, NULL, cli_uiout, &procs);

  interp_add (cli_interp);

}