/* Header file for GDB CLI command implementation library.
   Copyright (C) 2000-2024 Free Software Foundation, Inc.

   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_CLI_CLI_SCRIPT_H
#define GDB_CLI_CLI_SCRIPT_H

#include "compile/compile.h"
#include "gdbsupport/function-view.h"

struct ui_file;
struct cmd_list_element;

/* * Control types for commands.  */

enum misc_command_type
{
  ok_command,
  end_command,
  else_command,
  nop_command
};

enum command_control_type
{
  simple_control,
  break_control,
  continue_control,
  while_control,
  if_control,
  commands_control,
  python_control,
  compile_control,
  guile_control,
  while_stepping_control,
  define_control,
  document_control,
  invalid_control
};

struct command_line;

extern void free_command_lines (struct command_line **);

/* A deleter for command_line that calls free_command_lines.  */

struct command_lines_deleter
{
  void operator() (command_line *cmd_lines) const
  {
    free_command_lines (&cmd_lines);
  }
};

/* A reference-counted struct command_line.  */
typedef std::shared_ptr<command_line> counted_command_line;

/* A unique_ptr specialization for command_line.  */
typedef std::unique_ptr<command_line, command_lines_deleter> command_line_up;

/* * Structure for saved commands lines (for breakpoints, defined
   commands, etc).  */

struct command_line
{
  explicit command_line (command_control_type type_, char *line_ = nullptr)
    : line (line_),
      control_type (type_)
  {
    memset (&control_u, 0, sizeof (control_u));
  }

  DISABLE_COPY_AND_ASSIGN (command_line);

  struct command_line *next = nullptr;
  char *line;
  enum command_control_type control_type;
  union
    {
      struct
	{
	  enum compile_i_scope_types scope;
	  void *scope_data;
	}
      compile;
    }
  control_u;
  /* * For composite commands, the nested lists of commands.  For
     example, for "if" command this will contain the then branch and
     the else branch, if that is available.  */
  counted_command_line body_list_0;
  counted_command_line body_list_1;

private:

  friend void free_command_lines (struct command_line **);

  ~command_line ()
  {
    xfree (line);
  }
};

/* Prototype for a function to call to get one more input line.

   If the function needs to return a dynamically allocated string, it can place
   in the passed-in buffer, and return a pointer to it.  Otherwise, it can
   simply ignore it.  */

using read_next_line_ftype = gdb::function_view<const char * (std::string &)>;

extern counted_command_line read_command_lines
    (const char *, int, int, gdb::function_view<void (const char *)>);
extern counted_command_line read_command_lines_1
    (read_next_line_ftype, int, gdb::function_view<void (const char *)>);


/* Exported to cli/cli-cmds.c */

extern void script_from_file (FILE *stream, const char *file);

extern void show_user_1 (struct cmd_list_element *c,
			 const char *prefix,
			 const char *name,
			 struct ui_file *stream);

/* Execute the commands in CMDLINES.  */

extern void execute_control_commands (struct command_line *cmdlines,
				      int from_tty);

/* Run execute_control_commands for COMMANDS.  Capture its output into
   the returned string, do not display it to the screen.  BATCH_FLAG
   will be temporarily set to true.  When TERM_OUT is true the output is
   collected with terminal behavior (e.g. with styling).  When TERM_OUT is
   false raw output will be collected (e.g. no styling).  */

extern std::string execute_control_commands_to_string
    (struct command_line *commands, int from_tty, bool term_out);

/* Exported to gdb/breakpoint.c */

extern enum command_control_type
	execute_control_command (struct command_line *cmd,
				 int from_tty = 0);

extern enum command_control_type
	execute_control_command_untraced (struct command_line *cmd);

extern counted_command_line get_command_line (enum command_control_type,
					      const char *);

extern void print_command_lines (struct ui_out *,
				 struct command_line *, unsigned int);

/* Exported to gdb/infrun.c */

extern void execute_user_command (struct cmd_list_element *c, const char *args);

/* If we're in a user-defined command, replace any $argc/$argN
   reference found in LINE with the arguments that were passed to the
   command.  Otherwise, treat $argc/$argN as normal convenience
   variables.  */
extern std::string insert_user_defined_cmd_args (const char *line);

/* Exported to top.c */

extern void print_command_trace (const char *cmd, ...)
  ATTRIBUTE_PRINTF (1, 2);

/* Exported to event-top.c */

extern void reset_command_nest_depth (void);

/* Return true if A and B are identical.  Some commands carry around a
   'void *' compilation context, in this case this function doesn't try to
   validate if the context is actually the same or not, and will just
   return false indicating the commands have changed.  That is, a return
   value of true is a guarantee that the commands are equal, a return
   value of false means the commands are possibly different (and in most
   cases are different).  */

extern bool commands_equal (const command_line *a, const command_line *b);

#endif /* GDB_CLI_CLI_SCRIPT_H */