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/* Manages interpreters for GDB, the GNU debugger.
Copyright (C) 2000-2019 Free Software Foundation, Inc.
Written by Jim Ingham <jingham@apple.com> of Apple Computer, 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 INTERPS_H
#define INTERPS_H
struct ui_out;
struct interp;
struct ui;
typedef struct interp *(*interp_factory_func) (const char *name);
/* Each interpreter kind (CLI, MI, etc.) registers itself with a call
to this function, passing along its name, and a pointer to a
function that creates a new instance of an interpreter with that
name. */
extern void interp_factory_register (const char *name,
interp_factory_func func);
extern struct gdb_exception interp_exec (struct interp *interp,
const char *command);
class interp
{
public:
explicit interp (const char *name);
virtual ~interp () = 0;
virtual void init (bool top_level)
{}
virtual void resume () = 0;
virtual void suspend () = 0;
virtual gdb_exception exec (const char *command) = 0;
/* Returns the ui_out currently used to collect results for this
interpreter. It can be a formatter for stdout, as is the case
for the console & mi outputs, or it might be a result
formatter. */
virtual ui_out *interp_ui_out () = 0;
/* Provides a hook for interpreters to do any additional
setup/cleanup that they might need when logging is enabled or
disabled. */
virtual void set_logging (ui_file_up logfile, bool logging_redirect) = 0;
/* Called before starting an event loop, to give the interpreter a
chance to e.g., print a prompt. */
virtual void pre_command_loop ()
{}
/* Returns true if this interpreter supports using the readline
library; false if it uses GDB's own simplified readline
emulation. */
virtual bool supports_command_editing ()
{ return false; }
const char *name () const
{
return m_name;
}
/* This is the name in "-i=" and "set interpreter". */
private:
char *m_name;
/* Interpreters are stored in a linked list, this is the next
one... */
public:
struct interp *next;
/* Has the init method been run? */
bool inited;
};
extern void interp_add (struct ui *ui, struct interp *interp);
/* Look up the interpreter for NAME, creating one if none exists yet.
If NAME is not a interpreter type previously registered with
interp_factory_register, return NULL; otherwise return a pointer to
the interpreter. */
extern struct interp *interp_lookup (struct ui *ui, const char *name);
/* Set the current UI's top level interpreter to the interpreter named
NAME. Throws an error if NAME is not a known interpreter or the
interpreter fails to initialize. */
extern void set_top_level_interpreter (const char *name);
/* Temporarily set the current interpreter, and reset it on
destruction. */
class scoped_restore_interp
{
public:
scoped_restore_interp (const char *name)
: m_interp (set_interp (name))
{
}
~scoped_restore_interp ()
{
set_interp (m_interp->name ());
}
scoped_restore_interp (const scoped_restore_interp &) = delete;
scoped_restore_interp &operator= (const scoped_restore_interp &) = delete;
private:
struct interp *set_interp (const char *name);
struct interp *m_interp;
};
extern int current_interp_named_p (const char *name);
/* Call this function to give the current interpreter an opportunity
to do any special handling of streams when logging is enabled or
disabled. LOGFILE is the stream for the log file when logging is
starting and is NULL when logging is ending. LOGGING_REDIRECT is
the value of the "set logging redirect" setting. If true, the
interpreter should configure the output streams to send output only
to the logfile. If false, the interpreter should configure the
output streams to send output to both the current output stream
(i.e., the terminal) and the log file. */
extern void current_interp_set_logging (ui_file_up logfile,
bool logging_redirect);
/* Returns the top-level interpreter. */
extern struct interp *top_level_interpreter (void);
/* Return the current UI's current interpreter. */
extern struct interp *current_interpreter (void);
extern struct interp *command_interp (void);
extern void clear_interpreter_hooks (void);
/* Returns true if INTERP supports using the readline library; false
if it uses GDB's own simplified form of readline. */
extern int interp_supports_command_editing (struct interp *interp);
/* Called before starting an event loop, to give the interpreter a
chance to e.g., print a prompt. */
extern void interp_pre_command_loop (struct interp *interp);
/* List the possible interpreters which could complete the given
text. */
extern void interpreter_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text,
const char *word);
/* well-known interpreters */
#define INTERP_CONSOLE "console"
#define INTERP_MI1 "mi1"
#define INTERP_MI2 "mi2"
#define INTERP_MI3 "mi3"
#define INTERP_MI "mi"
#define INTERP_TUI "tui"
#define INTERP_INSIGHT "insight"
#endif
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